Snyk helps you find, fix and monitor known vulnerabilities in Node.js npm, Ruby and Java dependencies, both on an ad hoc basis and as part of your CI (Build) system.
Documentation
Full documentation is available on snyk.io
Table Of Contents:
Installation
- Install the Snyk utility using
npm install -g snyk
. - Once installed you will need to authenticate with your Snyk account:
snyk auth
For more detail on how to authenticate take a look at the CLI authentication section of the Snyk documentation.
CLI
snyk [options] [command] [package]
Run snyk --help
to get a quick overview of all commands or for full details on the CLI read the snyk.io CLI docs.
The package argument is optional. If no package is given, Snyk will run the command against the current working directory allowing you test you non-public applications.
Features
- Find known vulnerabilities by running
snyk test
on a project either as a one off or as part of your CI process. - Fix vulnerabilities using
snyk wizard
andsnyk protect
.snyk wizard
walks you through finding and fixing known vulnerabilities in your project. Remediation options include configuring your policy file to update, auto patch and ignore vulnerabilities. (npm only)snyk protect
your code from vulnerabilities by applying patches and optionally suppressing specific vulnerabilities.
- Alert
snyk monitor
records the state of dependencies and any vulnerabilities on snyk.io so you can be alerted when new vulnerabilities or updates/patches are disclosed that affect your repositories. - Prevent new vulnerable dependencies from being added to your project by running
snyk test
as part of your CI to fail tests when vulnerable Node.js or Ruby dependencies are added.
Build
If using this package from the repo directly, you'll need to first build the custom lodash by running:
npm run build
This will create a dist
directory with the minimal lodash file.
When using the package via npm, the build is not needed as the dist
directory is already included in the npm package.
Docker
Snyk is also provided as a set of Docker images that carry the runtime environment of each package manager. For example, the npm image will carry all of the needed setup to run npm install
on the currently running container. Currently there are images for npm, Ruby, Maven, Gradle and SBT.
The images can perform snyk test
by default on the specified project which is mounted to the container as a read/write volume, and snyk monitor
if the MONITOR
environment variable is set when running the docker container. When running snyk monitor
with the GENERATE_REPORT
environment variable set, an HTML file called snyk-report.html
and a CSS file called snyk-report.css
will be generated. The image also writes a file called snyk-res.json
for internal use and snyk-error.log
for errors that we can look at if something goes wrong.
The following environment variables can be used when running the container on docker:
SNYK_TOKEN
- Snyk API token, obtained from https://snyk.io/account.USER_ID
- [OPTIONAL] Current user ID on the host machine. If not provided will take the user ID of the currently running user inside the container. This is used for CI builds such as Jenkins where we are running with a non-privileged user and want to allow the user to access the mounted project folder.MONITOR
- [OPTIONAL] If set, tells the image that we want to runsnyk monitor
after runningsnyk test
.PROJECT_FOLDER
- [OPTIONAL] If set, this will cd to the directory inside the mounted project dir to run snyk inside it.ENV_FLAGS
- [OPTIONAL] additional environment parameters to pass tosnyk test
when running the container.
Docker images are tagged according to the package manager runtime they include, the package manager version and snyk version. The general format of tags is [snyk-version]-[package-manager]-[package-manager-version] or just [package-manager]-[package-manager-version] if we want to use the latest version of snyk. Please see available tags to see the available options.
[snyk-version] - The version of snyk that is installed in the image, if version is omitted it will use the latest version.
[package-manager] - One of the available package managers (e.g: npm, mvn, gradle, etc...).
[package-manager-version] - The version of the package manager that is installed inside the image.
Please see the following examples on how to run Snyk inside docker:
NodeJS (npm)
We will need to mount the project root folder when running the image so that Snyk can access the code within the container. The host project folder will be mounted to /project
on the container and will be used to read the dependencies file and write results for CI builds. Here's an example of running snyk test
and snyk monitor
in the image (with the latest version of Snyk) for npm:
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
snyk/snyk-cli:npm test --org=my-org-name
RubyGems
We will need to mount the project root folder when running the image so that Snyk can access the code within the container. The host project folder will be mounted to /project
on the container and will be used to read the dependencies file and write results for CI builds. Here's an example of running snyk test
and snyk monitor
in the image (with the latest version of Snyk) for RubyGems:
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
snyk/snyk-cli:rubygems test --org=my-org-name
Maven 3.5.2
We will need to mount the project root folder when running the image so that Snyk can access the code within the container and mount the local .m2 and .ivy2 folders. The host project folder will be mounted to /project
on the container and will be used to read the dependencies file and write results for CI builds. Here's an example of running snyk test
and snyk monitor
in the image (with the latest version of Snyk) for Maven:
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
-v "/home/user/.m2:/home/node/.m2"
-v "/home/user/.ivy2:/home/node/.ivy2"
snyk/snyk-cli:mvn-3.5.2 test --org=my-org-name
SBT 0.13.16 / SBT 1.0.4
We will need to mount the project root folder when running the image so that Snyk can access the code within the container and mount the local .m2 and .ivy2 folders. The host project folder will be mounted to /project
on the container and will be used to read the dependencies file and write results for CI builds. Here are examples of running snyk test
and snyk monitor
in the image (with the latest version of Snyk) for SBT:
NOTE: the dependency-tree
module is required for snyk
to process Scala projects. Use version 0.8.2 for SBT 0.13.16 and version 0.9.0 for version SBT 1.0.4.
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
-v "/home/user/.m2:/home/node/.m2"
-v "/home/user/.ivy2:/home/node/.ivy2"
snyk/snyk-cli:sbt-0.13.16 test --org=my-org-name
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
-v "/home/user/.m2:/home/node/.m2"
-v "/home/user/.ivy2:/home/node/.ivy2"
snyk/snyk-cli:sbt-1.0.4 test --org=my-org-name
Gradle 2.8 / Gradle 4.4
We will need to mount the project root folder when running the image so that Snyk can access the code within the container and mount the local .m2 and .ivy2 folders. The host project folder will be mounted to /project
on the container and will be used to read the dependencies file and write results for CI builds. Here's an example of running snyk test
and snyk monitor
in the image (with the latest version of Snyk) for Gradle:
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
-v "/home/user/.m2:/home/node/.m2"
-v "/home/user/.ivy2:/home/node/.ivy2"
snyk/snyk-cli:gradle-2.8 test --org=my-org-name
docker run -it
-e "SNYK_TOKEN=<TOKEN>"
-e "USER_ID=1234"
-e "MONITOR=true"
-v "<PROJECT_DIRECTORY>:/project"
-v "/home/user/.m2:/home/node/.m2"
-v "/home/user/.ivy2:/home/node/.ivy2"
snyk/snyk-cli:gradle-4.4 test --org=my-org-name
Badge
Once you’re vulnerability-free, you can put a badge on your README showing your package has no known security holes. This will show your users you care about security, and tell them that they should care too.
If there are no vulnerabilities, this is indicated by a green badge.
If vulnerabilities have been found, the red badge will show the number of vulnerabilities.
Get the badge by copying the relevant snippet below and replacing "name" with the name of your package.
HTML:
<img src="https://snyk.io/package/npm/name/badge.svg" alt="Known Vulnerabilities" data-canonical-src="https://snyk.io/package/npm/name" style="max-width:100%;">
Markdown:
[![Known Vulnerabilities](https://snyk.io/package/npm/name/badge.svg)](https://snyk.io/package/npm/name)


Uploads segment documents to AWS X-Ray. The X-Ray SDK generates segment documents and sends them to the X-Ray daemon, which uploads them in batches. A segment document can be a completed segment, an in-progress segment, or an array of subsegments.
See also: AWS API Documentation
put-trace-segments
--trace-segment-documents <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
--trace-segment-documents (list)
A JSON document defining one or more segments or subsegments. Segments must include the following fields.
Required Segment Document Fields
- name - The name of the service that handled the request.
- id - A 64-bit identifier for the segment, unique among segments in the same trace, in 16 hexadecimal digits.
- trace_id - A unique identifier that connects all segments and subsegments originating from a single client request.
- start_time - Time the segment or subsegment was created, in floating point seconds in epoch time, accurate to milliseconds. For example,<PHONE_NUMBER>.010 or 1.480615200010E9 .
- end_time - Time the segment or subsegment was closed. For example,<PHONE_NUMBER>.090 or 1.480615200090E9 . Specify either an end_time or in_progress .
- in_progress - Set to true instead of specifying an end_time to record that a segment has been started, but is not complete. Send an in progress segment when your application receives a request that will take a long time to serve, to trace the fact that the request was received. When the response is sent, send the complete segment to overwrite the in-progress segment.
A trace_id consists of three numbers separated by hyphens. For example, 1-58406520-a006649127e371903a2de979. This includes:
Trace ID Format
- The version number, i.e. 1 .
- The time of the original request, in Unix epoch time, in 8 hexadecimal digits. For example, 10:00AM December 2nd, 2016 PST in epoch time is<PHONE_NUMBER> seconds, or 58406520 in hexadecimal.
- A 96-bit identifier for the trace, globally unique, in 24 hexadecimal digits.
Syntax:
"string" "string" ...
--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.
--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.
UnprocessedTraceSegments -> (list)
Segments that failed processing.
(structure)
Information about a segment that failed processing.
Id -> (string)
The segment's ID.ErrorCode -> (string)
The error that caused processing to fail.Message -> (string)
The error message.


Would you like to delete /{{active.path}}? This will delete the article "{{active.title}}" and all associated data


When a subclass inherits from a superclass, it also inherits its methods; however, it can also override the superclass methods (as well as declare and implement new ones). Consider the following Sports class:
class Sports{
String getName(){
return "Generic Sports";
}
void getNumberOfTeamMembers(){
System.out.println( "Each team has n players in " + getName() );
}
}
Next, we create a Soccer class that inherits from the Sports class. We can override the getName method and return a different, subclass-specific string:
class Soccer extends Sports{
@Override
String getName(){
return "Soccer Class";
}
}
Note: When overriding a method, you should precede it with the @Override
annotation. The parameter(s) and return type of an overridden method must be exactly the same as those of the method inherited from the supertype.
Task
Complete the code in your editor by writing an overridden getNumberOfTeamMembers method that prints the same statement as the superclass' getNumberOfTeamMembers method, except that it replaces $n$ with $11$ (the number of players on a Soccer team).
Output Format
When executed, your completed code should print the following:
Generic Sports
Each team has n players in Generic Sports
Soccer Class
Each team has 11 players in Soccer Class


Create new exercise
You cannot edit the original date submitted because you can only do one exercise at a time!
Name:
Repetitions:
Weight:
Units:
{% if exercise.lbs %}
Pounds
Kilograms
{% else %}
Pounds
Kilograms
{% endif %} Date:


AFAAN NAQVI
DevBootcamp RockDoves 2016 Cohort Member
Energy Engineer at Arup
m.<PHONE_NUMBER>
WHERE I'M FROM
I grew up in Karachi, Pakistan, a city with an estimated population of 23 million. Karachi was my home through high-school after which I left Pakistan for undergraduate studies.
My parents still live in Karachi, and I visit them every year.
EDUCATIONAL EXPERIENCE
I attended middle and high school in Karachi, before heading to Montreal for an undergraduate degree in Mechanical Engineering at McGill University. After many hot and humid summers in Karachi, the freezing Montreal winters took some adjusting to!
I then completed a Masters degree in Engineering Management at Rochester Institute of Technology in upstate New York, before moving to San Francisco for my job at Arup. I have since completed a masters module course in Smart Cities at Imperial College London.
INTERESTS AND HOBBIES
I like to dream small. My interests include spending time with my wife and our friends, playing and coaching soccer, playing and listening to music, and eating simple food.
SOMETHING QUIRKY
I never really progressed from chocloate milk to coffee, so please don't be embarrased to be seen with me if we "go for a coffee" once on-site and I order a frozen, milky, something!


PSALMS 4
A psalm written by David for the choir director; a psalm to be accompanied by people playing stringed instruments
1 God, answer me when I pray to you.
You are the one who shows people that I am right to trust in you.
You rescued me when I was in great trouble.
Act mercifully toward me and listen to me while I pray.
2 How long will you people shame me instead of honoring me?
You people love to falsely accuse me.
3 All those who honor Yahweh—
he has chosen them to belong to him.
Yahweh will listen to me when I pray to him.
4 You should be afraid of Yahweh, but do not allow your fear to cause you to sin.
While you lie on your bed,
silently examine what you are thinking in your inner being.
5 Also, offer to Yahweh the proper sacrifices
and continue trusting in him.
6 Some people ask, "Will somone please bring good things to us?"
But I say, "Yahweh, continue to act kindly toward us.
7 You have caused me to be very happy;
I am happier than people who have harvested a great amount of grain and grapes.
8 It is in peace and security that I will lie down at night and sleep soundly
because I know that it is only you, Yahweh, who will keep me safe."


Hi,Guys! Do you know what is "Sahring Economy"?
The Friday night, We are pleased and honored to announce that we invited two British expert, Finn and Rob, to talk about "How dose the sharing economy change our life." welcome,Everyone!!!
reference: What is Sharing Economy?
The schedule:-
opening:
- How do you pronounce Uber, is it Uber or Uber?
- Do you know Uber? How does it work?
- Have you ever use Uber? What is your experience?
- What do you think about uber?
-
Main topic:
- What is sharing economy?
- What do you think about it?
- What make "Sharing economy" pop out?
- What will change because of sharing economy?
- Will this activity connect people?
- Provide some idea with sharing economy? eg:Justpark.
-
Did you do your homework?
- When you was doing your homework, What did you find?
- What kind of culture can create this kind of idea?
- Is this going to happen in Taiwan?
- Why does this kind of idea always come from other country?
- dessert: Q&A with Finn and Rob.


--- layout: default title coderit: Home ---
codeRIT is a community of students who like to make things. We empower all RIT students, especially newcomers, with the tools and knowledge necessary to become successful makers.
Learn something new.
Join a community of makers.
Give back to the RIT community.
If you would like to be a part of RIT's history, we could use your help. Join one of our committees and help create something great!
Get Involved


You can use the /whisper command in Slack to share information via one-time URL's (enable whisper in slack via the "add to slack" icon on the top right of the page). If you have already authorized whisper, just go to your slack team and invoke /whisper. For example:
/whisper hello world
This will issue a slash command to whisper.ws, which will generate a one-time URL for you and share it back with the channel:
Anyone in the channel (we recommend this mostly for 1:1 communication) will then be able to click on the URL to view the secret you typed (in this case "hello world"). Once it has been viewed, the URL will be automatically expired and content deleted from our servers.


What is a CMS?
Content
File-based Content
(Non-CMS solution)
html files in folders
No reuse
Limited search and filtering
Database Driven Content
Drupal CMS solution
Like a spreadsheet
Columns and Rows
[spreadsheet example]
Advantages
Reusability
Fine level of control
Structured
Management
Empowered Content Creators
Workflow & Moderation
System
Components Aligned for a Common Goal
Enabling you to communicate quickly & efficiently with a minimum of effort.


Usage
@includes.advertisement()
Installing an SDK
Latest Stable
Install the latest stable version of your SDK of choice
(say, Java JDK) by running the following command:
$ sdk install java
You will see something like the following output:
Downloading: java @javaVersion
In progress...
######################################################################## 100.0%
Installing: java @javaVersion
Done installing!
Now you will be prompted if you want this version to be set as
default.
Do you want java @javaVersion to be set as default? (Y/n):
Answering yes (or hitting enter) will ensure that all
subsequent shells opened will have this version of the SDK in use by default.
Setting java @javaVersion as default.
Specific Version
Need a specific version of an SDK? Simply qualify the
version you require:
$ sdk install scala @scalaVersion
All subsequent steps same as above.
Install Local Version(s)
Using a snapshot version? Already have a local installation? Setup a local version by specifying the path to the local installation:
$ sdk install groovy 3.0.0-SNAPSHOT /path/to/groovy-3.0.0-SNAPSHOT
$ sdk install java 17-zulu /Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home
Note that the local version name (3.0.0-SNAPSHOT and
17-zulu in the examples above) must be a unique name
which is not already in the list of available version names.
Remove Version
Remove an installed version.
$ sdk uninstall scala @scalaVersion
Note that removing a local version will not remove the local installation.
List Candidates
To get a listing of available Candidates:
$ sdk list
This will render a searchable alphabetic list with name, current stable default
version, website URL, description and easy install command for each Candidate.
The output is piped to less
so standard keyboard shortcuts may be
used with q
to exit.
================================================================================
Available Candidates
================================================================================
q-quit /-search down
j-down ?-search up
k-up h-help
--------------------------------------------------------------------------------
...
--------------------------------------------------------------------------------
Java (@javaVersion) https://projects.eclipse.org/projects/adoptium.temurin/
Java Platform, Standard Edition (or Java SE) is a widely used platform for
development and deployment of portable code for desktop and server environments.
Java SE uses the object-oriented Java programming language. It is part of the
Java software-platform family. Java SE defines a wide range of general-purpose
APIs – such as Java APIs for the Java Class Library – and also includes the Java
Language Specification and the Java Virtual Machine Specification.
$ sdk install java
--------------------------------------------------------------------------------
...
List Versions
To get a listing of Candidate Versions:
$ sdk list groovy
This will result in a list view showing the available, local, installed and
current versions of the SDK.
================================================================================
Available Groovy Versions
================================================================================
> * 2.4.4 2.3.1 2.0.8 1.8.3
2.4.3 2.3.0 2.0.7 1.8.2
2.4.2 2.2.2 2.0.6 1.8.1
2.4.1 2.2.1 2.0.5 1.8.0
2.4.0 2.2.0 2.0.4 1.7.9
2.3.9 2.1.9 2.0.3 1.7.8
2.3.8 2.1.8 2.0.2 1.7.7
2.3.7 2.1.7 2.0.1 1.7.6
2.3.6 2.1.6 2.0.0 1.7.5
2.3.5 2.1.5 1.8.9 1.7.4
2.3.4 2.1.4 1.8.8 1.7.3
2.3.3 2.1.3 1.8.7 1.7.2
2.3.2 2.1.2 1.8.6 1.7.11
2.3.11 2.1.1 1.8.5 1.7.10
2.3.10 2.1.0 1.8.4 1.7.1
================================================================================
+ - local version
* - installed
> - currently in use
================================================================================
Use Version
Choose to use a given version in the current terminal:
$ sdk use scala @scalaVersion
It is important to realise that this will switch the candidate version for
the current shell only. To make this change permanent, use the default command instead.
Default Version
Chose to make a given version the default:
$ sdk default scala @scalaVersion
This will ensure that all subsequent shells will start with version @scalaVersion in
use.
Current Version(s)
To see what is currently in use for a Candidate:
$ sdk current java
Using java version @javaVersion
To see what is currently in use for all Candidates:
$ sdk current
Using:
groovy: @groovyVersion
java: @javaVersion
scala: @scalaVersion
Env Command
Want to switch to a specific JDK or SDK every time you visit a project?
This can be achieved through an .sdkmanrc
file in the base
directory of your project. This file can be generated automatically by
issuing the following command:
$ sdk env init
A config file with the following content has now been created in the
current directory:
# Enable auto-env through the sdkman_auto_env config
# Add key=value pairs of SDKs to use below
java=@javaVersion
The file is pre-populated with the current JDK version in use, but can
contain as many key-value pairs of supported SDKs as needed.
To switch to the configuration present in your .sdkmanrc
file,
simply issue the following command:
sdk env
You should see output that looks something like this:
Using java version @javaVersion in this shell.
Your path has now also been updated to use any of these SDKs in your current shell.
When leaving a project, you may want to reset the SDKs to their default version.
This can be achieved by entering:
$ sdk env clear
Restored java version to @javaVersion (default)
After checking out a new project, you may be missing some SDKs specified in the project's
.sdkmanrc
file. To install these missing SDKs, just type:
$ sdk env install
Downloading: java @javaVersion
In progress...
######################################################################## 100,0%
Repackaging Java @javaVersion...
Done repackaging...
Installing: java @javaVersion
Done installing!
Do you want to switch SDK versions automatically when you cd
into a
directory? This can be done by setting the sdkman_auto_env=true
in
the SDKMAN configuration.
Note that this will also reset any project-specific SDKs to their default version
when leaving the directory.
Upgrade Version(s)
To see what is currently out of date for a Candidate on your system:
$ sdk upgrade springboot
Upgrade:
springboot (1.2.4.RELEASE, 1.2.3.RELEASE < @springbootVersion)
To see what is outdated for all Candidates:
$ sdk upgrade
Upgrade:
gradle (2.3, 1.11, 2.4, 2.5 < @gradleVersion)
grails (2.5.1 < @grailsVersion)
springboot (1.2.4.RELEASE, 1.2.3.RELEASE < @springbootVersion
SDKMAN! Version
Display the current script and native versions of SDKMAN!:
$ sdk version
SDKMAN!
script: 5.7.0
native: 0.1.3
Offline Mode
Initially called Aeroplane Mode, this allows SDKMAN! to function
when working offline. It has a parameter that can be passed
toenable or disable the offline mode.
$ sdk offline enable
Forced offline mode enabled.
$ sdk offline disable
Online mode re-enabled!
When operating in offline mode, most commands will still work
even though they will operate in a scaled down capacity. An example is the list
command, which will only display the currently installed and active version(s):
$ sdk list groovy
------------------------------------------------------------
Offline Mode: only showing installed groovy versions
------------------------------------------------------------
> 2.4.4
* 2.4.3
------------------------------------------------------------
* - installed
> - currently in use
------------------------------------------------------------
The offline mode will also be disabled/enabled automatically when the internet
becomes available/unavailable. Naturally, commands that require internet
connectivity will not function but give a warning.
Self-Update
Installs a new version of SDKMAN! if available.
$ sdk selfupdate
If no new version is available an appropriate message will be displayed.
Re-installation may be forced by passing the force parameter to the command:
$ sdk selfupdate force
Automatic daily checks for new versions of SDKMAN! will also be performed on the
behalf of the user.
Update
Periodically SDKMAN! requires a refresh to become aware of new (or removed)
candidates.
When candidate metadata has potentially grown stale, a warning is displayed
with instruction
on how to update. By simply running the following command, the candidate
cache will be refreshed and new candidates will become available for
installation:
WARNING: SDKMAN is out-of-date and requires an update.
$ sdk update
Adding new candidates(s): kotlin
Flush
It should rarely be necessary to flush SDKMAN!'s local state.
The flush command helps with this, so you don't need to delete any directories.
Manually deleting directories like
the .sdkman/tmp
directory will break SDKMAN! Always use
the flush
command instead!
$ sdk flush
Home
When using SDKMAN in scripts, it is often useful to get the absolute
path of where an SDK resides (similar to how the java_home
command works on macOS). For this we have the home
command.
$ sdk home java @javaVersion
/home/myuser/.sdkman/candidates/java/@javaVersion
Help
You can get basic help by running the following command:
$ sdk help
This should render a useful top-level help page. You can add qualifier to this command to get help about a specific sub-command.
$ sdk help install
Configuration
Configuration can be found in the ~/.sdkman/etc/config
file. To edit the
configuration, the sdk config
command may be issued to edit this file
in the system editor. The following configurations are available:
# make sdkman non-interactive, preferred for CI environments
sdkman_auto_answer=true|false
# check for newer versions and prompt for update
sdkman_selfupdate_feature=true|false
# disables SSL certificate verification
# https://github.com/sdkman/sdkman-cli/issues/327
# HERE BE DRAGONS....
sdkman_insecure_ssl=true|false
# configure curl timeouts
sdkman_curl_connect_timeout=5
sdkman_curl_continue=true
sdkman_curl_max_time=10
# subscribe to the beta channel
sdkman_beta_channel=true|false
# enable verbose debugging
sdkman_debug_mode=true|false
# enable colour mode
sdkman_colour_enable=true|false
# enable automatic env
sdkman_auto_env=true|false
# enable rosetta2 compatibility for apple silicon
sdkman_rosetta2_compatible=true|false
# enable bash or zsh auto-completion
sdkman_auto_complete=true|false


WITNESS LIST County Affairs Committee May 5, 1999-8:00A HB 799 For: Dahill, John (Dallas County Commissioners Court) Pardue, Craig (Dallas County) Against: Rushing, Allan (Self and Tax Assessor Collectors Association) HB 3781 For: Allison, Jim (County Judges & Commissioners Association of Texas) HB 3845 For: Frost, Ford J. (Self) Huddleston, Mark (Self and Chambers County Commissioners Court) Jamison, J. R. (Self) Powers, Bill (Texas Farm Bureau) Randolph, Robert R. (Coastal Sugar Producers Coop.) On: Combs, Susan (TDA - Texas Department of Agriculture) SB 336 For: Riester, Eric (Bexar County) SB 338 For: Riester, Eric (Bexar County) SB 339 For: Mixon, Carl (Self and Bexar County Commissioners Court) On: Jacobi, John A. (Texas Department of Health)


MSP investigating fatal car crash in Freetown
by Manoella MacedoFREETOWN, Mass. - State Police troopers are investigating a car crash that killed at least one person on Thursday night.
Troopers responded to reports of a crash at around 8:40 p.m. on Route 24 northbound south of Exit 10 in Freetown.
At the scene, officials found three vehicles had been involved with multiple injuries. One of those injuries was considered life-threatening.
Freetown firefighters and EMS responded to the scene, only to determine the person with the life-threatening injuries had died on scene.
Authorities continue to investigate this incident.
No further details have been released at this time.
This is a developing story. Stay with Boston 25 News for the latest details as soon as they become available.


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This is a simple example of how elements can be found on the page and how annotations can be drawn.
1) Note that annotations above the staves are written into the ABC notation using the syntax "^text".
2) Note that room is created for annotations below the staves by creating a w: line and then setting its fill to none on the stylesheet.
3) Note that the notes are retrieved by their unique class and their position is retrieved. When the music is changed, this will automatically move the drawn lines to the right place.
Note that \ is a character which must be escaped in JavaScript.


Hello, I am MSR Dinesh, a Final year undergraduate student from Indian Institute of Technology, Bhubaneswar with major in Electronics and Communication Engineering. I have good Machine Learning,Deep Learning and Data science skills. I also gave good prgramming,Data Structures and Algorithmic knowledge.
E-Summit is the the annual entrepreneural conclave of IIT Bhubaneswar.It hosts a gamut of activities like worksops,competions and various talks by eminent industrialists and entrpreneurs. My role of being Core head of Sponsorhip team is to contact various gold,silver and diamond sponsors to sponsor the event and maintain all the formalities concerned
As a Sponsorship core Team member of E-Summit,IIT Bhubaneswar, I dealt with some of the Silver and Associate sponsors of the Event. Apart from sponsorship and Marketing relations, I have also been involved in various management and volunteering activities during the Event. As a part of the the volunteering activities, I hosted an event called "Stock Wars" which is an inter College competition for engineering students based on knowledge of stock market and investment
I was a part of core team member of Wissenare, the annual techno-management fest of IIT Bhubaneswar and served as the event Co-coordinator for the following events named Electrical Colloquia,Electrade,Biz Quiz,Tech Quiz. My role is to make sure that the events are organized properly.
I was a part of hostel council of our college, which has the duty to make the hostels a better place to live in. I served as one of the Mess Secretaries of Transit Hostel NISER for one year, communicating with the caterer, trying to solve issues faced by the students and foresee that the food served is hygiene and up to the mark.
GPA: 8.14
IPE SCORE: 977,MAINS MARKS: 269,ADVANCED RANK: 3683,AP-EAMCET RANK: 264,TS-EAMCET RANK: 535
GPA:9.8
1.Introduction to Electronics
2.Signals and Systems
3.Digital Electronics
4.Analog Communication
5.Micro-Proccesors and Micro-Controllers
6.Digital Communication
7.Electro-Magnetic waves and Radiating Systems
1.Machine learning on Coursera by Stanford University
2.Deep learning Speacialization on Coursera by Deeplearning.ai
3.Completed 16/22 courses on Data Scientist track on DataCamp
4.Mit OpenSource introduction to Algorithms and DataStructures
5.Succesful Negotiation:Essential skills and strategies on Coursera by University of Michigan
1.Digital thermometer using 8051 microcontroller in which LM35 sensor is used for measuring the surrounding temperature and take smart decision accordingly on interfaced Outputs.
2.Applied various machine learning algorithms like neural networks,SVM, Random forests on MNIST data set for Hand- written Digit recognition and tested their accuracies.
3.Predicted housing prices in various areas in NewYork by taking performing various pre-processing techniques like label encoding,data cleaning and applying machine learning algorithms.
Satellite Image Segmentation: The aim of the project is to segment the satellite images into various pre-defined classes like housing,vegetation,barren land etc., I have taken up this project to participate in the competition "The eye in the sky" at Inter-IIT-Tech meet 2018.


Tangcheng Middle School / Huajian Group Shanghai Architectural Design & Research Institute
- Curated by 韩爽 - HAN Shuang
- 1 minute
Elementary & Middle School · Shanghai, China
- version="1.0" encoding="UTF-8"? Architects: Huajian Group Shanghai Architectural Design & Research Institute
- AreaArea of this architecture projectArea: 22763.0 m2
- version="1.0" encoding="UTF-8"?YearCompletion year of this architecture project Year: 2019
- version="1.0" encoding="UTF-8"?PhotographsPhotographs: ACF domain graph vision
- Lead Architects Chang Su, Chunhui Tan, Lei Zuo
- Project Director Jianping Yuan
- Design Team Huajian Group Shanghai Architectural Design & Research Institute Co., Ltd.
- Architecture Design Chang Su, Chunhui Tan, Yifei Shen, Lei Zuo, Huan Jin, Yue Wu
- Clients Shanghai Pudong Tangcheng Investment Development Co., Ltd.
- Engineering Yunian Lu, Zuo Bao, Jinwei Li, Jianqiang Hou
- Electromechanical Hailiang Wang, Liguo Ma, Liu Liu, Min Zhao, Haishan Zhou, Hong Gan, Boli Yang
- Landscape Yu Zhou, Yuzhou Liu
- BIM Jun Su, Wanping Wang, Fanfan Wu, Guangxiang Zhu, Qin Li, Wen Liu, Shuyun Wu
- Consultants Shanghai Greenland Construction (Group) Co., Ltd.
- Green Building and Sponge City Special Feng Xu, Jianing Pan, Yan Yan, Jun Zhao, Bin Sun, Weiwei Shen, Liang Yu
More Specs Less Specs
Text description provided by the architects. Shanghai Tang Town Junior High School is located between Tanglong road and Yupan North road, Pudong, Shanghai. The school holds up 32 classes and consists of academic building, dormitory, offices, multi-purpose rooms and etc. The architects designed various communal spaces throughout the school and attempted to create an open campus environment.
As the modern education evolves, an open and diversified campus environment becomes encouraged. Therefore, the campus provides numerous communal space for teachers and students to rest, think and communicate.
The central courtyard, formed by the academic building in the north-south end and the offices in the east-west end, is designed as the most active space on campus. It is connected to the playground under the platform on the west side of the academic building. Moreover, there are abundant landscape facilities, such as the rain garden and sponge city displays for students to get in touch with the nature, and the delicate plant design also increases the campus’ visual attractiveness.
Besides, there are plenteous communal spaces inside the academic building connected between each floor. These spaces encourage students to interact with others and break the boundary among different class. Furthermore, they provide a platform for them to communicate and exchange ideas.
The horizontal lines on the building façade creates a sense of visual pureness, and the interaction of different building masses presents an appealing change of sunlight and shadow.


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4.1 : An Overview
Some History
While you will never need to know this for an exam, it's important to know the origins of boolean algebra. Boolean algebra was named for George Boole. George Boole is a man who is long dead now that has lots of impacts on the field of computing. He wrote a fancy paper called An Investigation into the Laws of Thought. To summarize, the paper focused on how the brain uses a series of true and false statements in combination to make decisions. Boolean algebra is the computation of these combinations of statements.
In English
Before we start doing boolean algebra, we should probably start with learning about basic boolean expressions. A boolean statement is a statement that is either true or false. "It is raining today" is a good example. If it is raining, the statement is true. If it is not raining, the statement is false. Computers really like boolean statements. If we recall, computers evaluate binary. Binary has only two values, 0 and 1. Booleans also only have two values, false and true. This means we can really think of two states, On and Off, True and False, 1 and 0. This means 0, false and off all correspond to the same state while 1, true and on all correspond to the same state.
In Math
While boolean algebra started as a thought process, there are a lot of applications. The applications we focus on in computer science are mathematical. This includes basic algebra, set theory and circuits. This guide will mostly focus on circuits. However, I will talk about other applications where applicable.
Practice Problems
Evaluate this boolean statement. Seven is an odd number.
Evaluate this boolean statement. B is the first letter of the alphabet.


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| Name | Total Lines | Lines of Code | Total Coverage | Code Coverage |
|---|---|---|---|---|
| AppController/lib/pbserver.rb | 142 | 70 | 59.86%
|
25.71%
|
Code reported as executed by Ruby looks like this...and this: this line is also marked as covered.Lines considered as run by rcov, but not reported by Ruby, look like this,and this: these lines were inferred by rcov (using simple heuristics).Finally, here's a line marked as not executed.
1 #!/usr/bin/ruby -w |
2 |
3 |
4 $:.unshift File.join(File.dirname(__FILE__)) |
5 require 'helperfunctions' |
6 |
7 |
8 # To support the Google App Engine Datastore API in a way that is |
9 # database-agnostic, App Engine applications store and retrieve data |
10 # via the PBServer. The server inherits this name from the storage |
11 # format of requests in the Datastore API: Protocol Buffers. |
12 module PbServer |
13 |
14 |
15 # As PBServers are single-threaded, we run more than one and put |
16 # nginx in front of it to load balance requests. This constant |
17 # indicates how many PBServers should be run on each node. |
18 NUM_PBSERVERS = 3 |
19 |
20 |
21 # The first port that should be used to host PBServers. |
22 STARTING_PORT = 4000 |
23 |
24 |
25 # The port that we should run nginx on, to load balance requests to the |
26 # various PBServers running on this node. |
27 PROXY_PORT = 3999 |
28 |
29 |
30 # The port that nginx should be listening to for non-encrypted requests to |
31 # the PBServers. |
32 LISTEN_PORT_NO_SSL = 8888 |
33 |
34 |
35 # The port that nginx should be listening to for encrypted requests to the |
36 # PBServers. |
37 LISTEN_PORT_WITH_SSL = 8443 |
38 |
39 |
40 # A list of databases that we cannot spawn multiple PBServers for and stick |
41 # nginx in front of, usually because they have locks or other database state |
42 # stored in memory. |
43 DBS_NEEDING_ONE_PBSERVER = ["mysql"] |
44 |
45 |
46 # A list of databases that we have native (not database agnostic) support for |
47 # within AppScale. |
48 DBS_WITH_NATIVE_PBSERVER = ["mysql"] |
49 |
50 # A list of databases that use the version 2 of database query support. |
51 # The second version has secondary index support. |
52 DBS_WITH_V2_PBSERVER = ['cassandra', 'hypertable', "hbase"] |
53 |
54 # The name that nginx should use as the identifier for the PBServer when it |
55 # we write its configuration files. |
56 NAME = "as_pbserver" |
57 |
58 |
59 # Starts a Protocol Buffer Server on this machine. We don't want to monitor |
60 # it ourselves, so just tell god to start it and watch it. |
61 def self.start(master_ip, db_local_ip, my_ip, table, zklocations) |
62 pbserver = self.get_executable_name(table) |
63 ports = self.get_server_ports(table) |
64 |
65 env_vars = { |
66 'APPSCALE_HOME' => APPSCALE_HOME, |
67 "MASTER_IP" => master_ip, |
68 "LOCAL_DB_IP" => db_local_ip |
69 } |
70 |
71 if DBS_WITH_V2_PBSERVER.include?(table) |
72 ports.each { |port| |
73 start_cmd = "/usr/bin/python2.6 #{pbserver} -p #{port} " + |
74 "--no_encryption --type #{table} -z \'#{zklocations}\' " |
75 # stop command doesn't work, relies on terminate.rb |
76 stop_cmd = "pkill -9 datastore_server" |
77 GodInterface.start(:pbserver, start_cmd, stop_cmd, port, env_vars) |
78 } |
79 else |
80 ports.each { |port| |
81 start_cmd = "/usr/bin/python2.6 #{pbserver} -p #{port} " + |
82 "--no_encryption --type #{table} -z \'#{zklocations}\' " |
83 "--no_encryption --type #{table} -z \'#{zklocations}\' " + |
84 "-s #{HelperFunctions.get_secret()} -a #{my_ip} --key" |
85 # stop command doesn work, relies on terminate.rb |
86 stop_cmd = "pkill -9 appscale_server" |
87 GodInterface.start(:pbserver, start_cmd, stop_cmd, port, env_vars) |
88 } |
89 end |
90 end |
91 |
92 |
93 # Stops the Protocol Buffer Server running on this machine. Since it's |
94 # managed by god, just tell god to shut it down. |
95 def self.stop(table) |
96 GodInterface.stop(:pbserver) |
97 end |
98 |
99 |
100 # Restarts the Protocol Buffer Server on this machine by doing a hard |
101 # stop (killing it) and starting it. |
102 def self.restart(master_ip, my_ip, table, zklocations) |
103 self.stop() |
104 self.start(master_ip, my_ip, table, zklocations) |
105 end |
106 |
107 |
108 # Returns a list of ports that should be used to host PBServers. |
109 def self.get_server_ports(table) |
110 if DBS_NEEDING_ONE_PBSERVER.include?(table) |
111 num_pbservers = 1 |
112 else |
113 num_pbservers = NUM_PBSERVERS |
114 end |
115 |
116 server_ports = [] |
117 num_pbservers.times { |i| |
118 server_ports << STARTING_PORT + i |
119 } |
120 return server_ports |
121 end |
122 |
123 |
124 def self.is_running(my_ip) |
125 `curl http://#{my_ip}:#{PROXY_PORT}` |
126 end |
127 |
128 |
129 # Since we have two different versions of the Protocol Buffer Server |
130 # (one that's database agnostic and one that's native to the DB), return |
131 # the right version for the database selected. |
132 def self.get_executable_name(table) |
133 if DBS_WITH_NATIVE_PBSERVER.include?(table) |
134 return "#{APPSCALE_HOME}/AppDB/appscale_server_#{table}.py" |
135 elsif DBS_WITH_V2_PBSERVER.include?(table) |
136 return "#{APPSCALE_HOME}/AppDB/datastore_server.py" |
137 else |
138 return "#{APPSCALE_HOME}/AppDB/appscale_server.py" |
139 end |
140 end |
141 end |
142 |
Generated on Tue Nov 27 14:27:59 -0800 2012 with rcov 1.0.0


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In an ever expanding world of information and data, things can get quite hairy. We have all these places to input data, but have you ever wondered how it is stored? Let me fill you in on what I have recently learned through my time playing with computers and their different programming languanges. Today, we will specifically use the languange, Ruby, to help bring the point across. After reading this blog, you will hopefully come away having a baseline knowledge on arrays and hashes. Shall we begin?!
What is an array?
An array is simply a collection of objects, which can be anything from a string, integer or boolean(true or false). There is no limit to how much you can store in an array, but today we will limit our array to 3-4 items. You see, in Ruby, it is quite easy to declare an array. Lets make it an empty one
any_name_array = []
Did you see what we did there? In order to declare an empty array, all you must do is set the array name (in this case, any_name_array
equal to []
. I am sure you are itching to see what an array with actual stuff in it looks like so I will do that now.
non_empty_array = [1, "some random string", true ]
We now have an array with 3 objects inside of it, a number 1, a string that says "some random string", and a boolean value which happens to be true. So now we have an array with items with it, but I am sure you are wondering what is the point of this. Think of it like a box with items with it. Someone puts items in a box, so they can later open that box and grab/use the item stored. In Ruby, to access that item all one must do is use the index method, as followed
non_empty_array[0]
=> this grabs the first item stored, the number 1
non_empty_array[1]
=> this grabs the second item stored, the string "some random string"
non_empty_array[2]
=> this grabs the third item stored, the boolean value "true".
In most programming languanges, the indexes (numbers in the []), start at 0 and not 1. So the first item was declared with non_empty_array[0]
You are probably wondering what were to happen if you typed the index 4. Well since there is not a 4th item in the array, than Ruby will just spit back a nil
back at you to tell you you don't have anything in there. However, we can add items to the array using the .push
method on the array like so:
non_empty_array.push("4th item")
So now, if we try to access the 4th item, which is at the 3rd indexed postion, ruby will spit back at us the item, which happens to be called "4th item"
This is just an introduction to what can be done with arrays. The following is a great reference for other things you can do with arrays:
RUBY-DOC.ORG:ARRAYS
Now it is time to look at hashes!
What is a hash?
A hash is a collection of objects, just like an array! The difference with arrays is that the indexes of a hash are not represented with those integer values we just talked about above. Hashes instead use a key, which can by a number or string! The following will be an example of a hash with 5 key-values.
favorites = {
:fruit => 'mango',
:animal =>'T-rex',
:sport => 'basketball',
:movie => 'Ocean Eleven',
:team => 'Oakland Raiders',
}
So we just declared a hash named favorites. Can you note any of the differences between this hash and the any_name_array
we made above (besides the content)? Well, first, when we declare an a hashs we use the curly braces {}, while for an array we use the squar braces []. Since we said that hashes use keys instead of integer indices, the hash looks a little more complicated than arrays, doesn't it? This is just a small price to pay, but easily well worth it, since now we can call on the values without having to count their indices. Secondly, you should not the : and the =>. The : defines the key, and the => points that key to a valur. So if were wondering what my favorite fruit was we can do it like so
favorite[:fruit] => mango
This is just a small introduction to hashes and arrays. Please bear with me, as I am still a novice when it comes to the Ruby languange. As I learn more about hashes and arrays, I will come back and add to this blog as I go. In the meantime, I hope you came away with some knowledge about hashes and arrays. Oh yeah, I forgot, but here is another reference source for more information about hashes!
RUBY-DOC.ORG:HASHES
Until next time, cheers!


VisDA Challenge
Aeroplane
Bicycle
Bus
Car
Horse
Knife
Motorcycle
Person
Plant
Skateboard
Train
Truck


Eurozone Preliminary CPI arrives at +1.0% YoY in Nov vs. +0.9% expected - EUR/USD unfazed
by Dhwani Mehta- Eurozone Prelim CPI rises to 1.0% in Nov vs. +0.7% last.
- EUR/USD stays unfazed above 1.1000
According to Eurostat’s flash reading of Eurozone CPI report, the annual reading came in at +1.0% in November, beating expectations of +0.9% and up from +0.7% previous.
Meanwhile, the core figure arrived at +1.3% in the reported month when compared to +1.2% expectations and +1.1% previous.
Separately, the Eurozone Unemployment Rate for October stood at 7.5% vs. 7.5% expected and 7.5% last.
Key Details (via Eurostat):
“Looking at the main components of euro area inflation, food, alcohol & tobacco is expected to have the highest annual rate in November (2.0%, compared with 1.5% in October), followed by services (1.9%, compared with 1.5% in October), non-energy industrial goods (0.4%, compared with 0.3% in October) and energy (-3.2%, compared with -3.1% in October).”
The Eurozone inflation report comes a day after the German Prelim CPI data was released, which showed that the German consumer price inflation accelerated by 1.2% YoY but remained well below the European Central Bank’s (ECB) rate target of just under 2 percent for the Eurozone as a whole.
Meanwhile, the common currency ignored the better-than-expected Eurozone CPI report for November, with EUR/USD keeping its range play intact just ahead of the 1.10 handle, as the bears await fresh catalysts for a fresh leg towards 1.0950/30 levels.


Passing custom type between the script and the host is a particular case of the "type sharing" pattern. The script and the host applications can pass run-time objects in both directions.
Because the script and the host need to pass (or access) objects of a custom type between each other this type has to be implemented in the common (shared) assembly.
Strictly speaking this scenario is not different to the described in the previous section ("Passing well-known type...") at all. In the "well-known" scenario the shared assembly were registered in GAC whereas for the "custom type" the shared assembly is just a local assembly.
Hosting the script engine with a shared local assembly is very simple from deployment point of view as no registration in GAC is required. Thus, deployment approach is just a simple XCOPY distribution. However, it introduces the following constraint when using some IDEs.
The same shared assembly that was used to compile the host application has to be loaded in all involved AppDomains at run-time.
The above statement sounds obvious, but some IDEs (e.g. VS7.1/8.0) load the copies of the referenced assemblies at run-time. Therefore some extra attention might be required. The problem may arise because the shared assembly for the script will be always loaded from the same directory where the script is, but IDE may force the host application to load a different copy of dll.
A simple way to overcome this problem is described in Image Processor tutorial . In this tutorial the host application is implemented in a single file which can be either compiled into executable (VS7.1 IDE) or executed as a script. In the both cases assembly confusion is avoided (even when using the same codebase).
As virtually there is no difference between passing/accessing the "well-known" and custom types all code samples from the previous topic are applicable. The only difference is that for the "custom type" examples the translators.dll would not be registered in GAC.
Simplified Hosting Model from another hand is a specific implementation of the "type sharing" pattern. When executing the script from the host application (according these simplified model) all the types implemented in the host assembly and in any of the dependency assemblies are automatically available/accessible from the script.
Simplified Hosting Model can be activated by setting CSScriptLibrary.CSScript.ShareHostRefAssemblies to true and it is active by default. In practice it means that you can access from the script even any public type implemented in the host without any extra effort. T
Reference | Tutorial (Image Processor)


Introduction
Arduinos and Raspberry Pis are in many ways complimentary technologies. Both have a large maker community, and are rooted in open source technology.
The Arduino excels as a dedicated processor, performing a single task. The Arduino's wide variety of low-level analogue and digital input and output has enabled its use in many physical computing projects.
By contrast, the Raspberry Pi has orders of magnitude more processing power than an Arduino. However, it's multi-tasking nature limits its use in real-time applications, and may be overkill in some simple situations. The Pi has a greater variety of high-level IO capabilities, such as Ethernet and HDMI, enabling it to be used more like an ordinary computer. However, the Pi lacks any analogue input, and has limited analogue output (in the form of a sound card.)
Using the Pi and Arduino together can provide the best of both devices, extending the range of projects which can be attempted. We will focus on interconnecting the Pi and Arduino over the I²C (or I2C) bus, a widely supported standard.
Setting up I²C
The hardware setup is covered in several sub-tutorials:
- Power Control: It is possible to control from software whether the Arduinos are turned on or off. This can be useful for prototyping, as the Arduinos may be automatically power cycled if an error occurs over the I²C bus. This is an optional feature, however, and is not required.
- Level Shifting: The Pi operates at +3.3 V logic levels, whilst the Arduino operates at +5 V. It is therefore necessary to build a level shifting circuit for I²C to enable the devices to communicate. Some people have reported success without level shifting. However, this involves operating both the Arduino and Pi outside of their specifications, so is not a recommended configuration. In particular, the +5 V output from the Arduino could damage the Pi.
- I2C Tutorial: This explains the basics of the I²C protocol, and how to configure it on the Pi. Note: if you use a breadboard to produce a breakout of the I²C bus, as described in the tutorial, then the output of the level shifting circuit should be connected to the rails, not the SDA and SCL pins directly.
A complete circuit (including the power control and level shifting circuit), with an Arduino attached, is pictured for illustration.
The above tutorials are enough to get I²C communication entirely up and running. If you feel comfortable programming the Raspberry Pi to be an I²C master and the Arduino's to be slaves, then you can stop reading! Otherwise, you may find it helpful to adapt the code I have produced below.
Using I²C
Example code for Arduino and Pi I2C communication is available on GitHub for download as a ZIP file.
The code for the Raspberry Pi configures it as an I²C master. It then periodically:
- Scans for slaves connected on the bus
- For each slave detected, sends "?" to request a list of variables that can be retrieved
- For each slave, sends the name of each variable to request its value.
- Displays in the console all values received, and logs (in a CSV format) to a file.
The code for the Arduino configures it as a slave. There is a configuration option to specify the address, which must be unique. There are also configuration options to specify the variables to publish.
Raspberry Pi
First download and extract the software by typing in a terminal:
$ wget http://github.com/AdamGleave/ArduinoPiI2C/archive/master.zip $ unzip master.zip
Note you may see a slightly different output to the example above, depending on what other files you have. The software should be extracted into a directory called "ArduinoPiI2C-Master". You can confirm this by typing:
$ ls ArduinoPiI2C-master Desktop master.zip ocr_pi.png Pi python_games test wiringPi
The code for the Raspberry Pi is stored in the subdirectory ArduinoPiI2C-master/Pi:
$ cd ArduinoPiI2C-master/Pi/ $ ls config.yaml i2cpoll.py
There are a number of configuration options stored in config.yaml. This file includes comments explaining the meaning of each parameter. The defaults should be suitable for most applications, however it may be necessary to change two parameters:
- enabled in section powerCtl. The default is to enable power cycling when there is an error on the I²C bus. This should be changed to false if you have not built the power control circuit.
- pin in section powerCtl. The default is BCM pin 7. You will need to change it if you use a different pin to the one used in the power control tutorial. If you have disabled power control, there is no need to change it.
- device-id in section i2c. The default is correct for the Raspberry Pi Model B revision 2 and Raspberry Pi Model A, but must be changed to 0 on the Raspberry Pi Model B revision 1.
Once you have changed these, and any other options you want, you are ready to run the program. It requires a library called PyYAML to read the configuration file. This can be installed on Raspbian by typing:
$ sudo apt-get install python-setuptools $ sudo easy_install pip $ sudo pip install pyyaml
Now run the program by typing:
$ cd ArduinoPiI2C-master/Pi/ $ sudo python i2cpoll.py
This will output to the console a few messages briefly describing the startup. On my system, with one Arduino connected, I see:
Opened I2C bus #1 I will list all connected I2C devices and attached sensors, and tell you whenever this changes. ***** Address 42: Device connected, with sensors: SENSOR1 SENSOR2 Address 42: SENSOR1 = 1934.00000 SENSOR2 = Running for >1 s
The program will continue to scan for new devices, and poll all detected devices. All values read will be logged to a file called Sensors.csv. For example, the log after letting the program run for around half a minute is:
$ cat Sensors.csv 2013-08-22T13:35:36.693525+00:00,SENSOR1,1934.00000 2013-08-22T13:35:36.693525+00:00,SENSOR2,Running for >1 s 2013-08-22T13:35:46.748915+00:00,SENSOR1,11743.00000 2013-08-22T13:35:46.748915+00:00,SENSOR2,Running for >1 s 2013-08-22T13:35:56.813942+00:00,SENSOR1,21554.00000 2013-08-22T13:35:56.813942+00:00,SENSOR2,Running for >1 s 2013-08-22T13:36:06.878950+00:00,SENSOR1,31359.00000
To stop the program, type Ctrl-C.
Arduino
Download the code from GitHub. Extract the ZIP file, and open the file Arduino/Arduino.ino in the Arduino IDE.
You should paste your code in the first section (displayed above). Rename setup and loop to your_setup and your_loop.
your_setup should not include any code initialising serial output (e.g. a Serial.begin call), or any setup related to I²C. This is handled in the function setup, which is called before your_setup. You can still use serial functions, such as Serial.println, as usual.
For each value you wish to make available via I²C, your_loop needs to update the value of a global variable: of type float, int, or char * (string).
Exporting Strings
There is a slight subtlety with making a string available over I²C. If you're only interested in exporting numeric values (float's and int's), this can be safely ignored!
Responding to requests from the Pi is interrupt driven. your_loop can stop executing at any time, with control transferred to the I²C-handling code requestEvent(). This code will send the value of the variable requested, and does not know if your_loop() has finished updating the value or not.
Floating point and integer variables update atomically. That is, assigning a new value to a variable has either completed, or not started. Modifying a character array, however, is not atomic. When an update is interrupted it is possible for, say, only the first half of the character array had been updated.
The simplest way to avoid this is to always use constant strings, as in the example code. If this is not possible for your application, then an alternative is to use malloc() to allocate new memory for your character array. Modify this new character array, without changing the value of the global variable. When the update has finished, modify the value of the global variable to point to the new character array. Then call free() on the old character array. (A similar approach is possible using two statically allocated character arrays.)
Once you have finished modifying your code, the only thing left is to modify the configuration. Scroll down to the section marked CONFIGURATION. Find the line, #define I2C_ADDRESS 42. Change 42 to any address between 8 and 119, not used by any other I²C device connected.
Finally, configure your variables by modifying the list sensor sensors[]:
sensor sensors[] = { {"SENSOR1", FLOAT, &sensorVal1}, {"SENSOR2", STRING, &sensorVal2}, //{"SENSOR3", FLOAT, &sensorVal3}, //{"SENSOR4", FLOAT, &sensorVal4}, //{"SENSOR5", STRING, &sensorVal5}, };
The comments above the list give a detailed explanation of the format.
Once you have completed the configuration, compile the code and send it to the Arduino. It should be automatically detected by the software running on the Pi, once it is connected.


What is it?
Coding conventions are a set of guidelines for a specific programming
language that recommend programming style, practices, and methods for
each aspect of a program written in that language.
When we learn a new language, we usually begin to code in a specific style.
In most cases, we’ll write in a style that we want, not one that has been
suggested to us. But once we start to code using a particular style, like
a spoken language dialect, it will become second nature — we’ll use that
style in everything we create. Such a style might include the conventions
we use to name variables and functions ($userName, $username or $user_name
for example), and how we comment our work. Any style should ensure that we
can read our code easily.
It is not that hard to read some small peace of code, but when we get to
the large collaborated projects - no standards makes this code unreadable
for everybody.
Following coding standards makes our code readable for other developers
which is important when you work in team. And it makes it easier to
understand what is going on in the code after some time.
Indenting and Whitespace
Indentation is not a requirement of most programming languages, where it is used as secondary notation. Rather, programmers indent to better convey he structure of their programs to human readers. In particular, indentation is used to show the relationship between control flow constructs such as conditions or loops and code contained within and outside them.
There are several widly used options for indentetion: 2 spaces, 4 spaces and tab. But I would suggest to use 2 spaces, since it won't bring your line far to the right if you have a lot of levels, and will stay same for all editors and systems.
Besides indentation - we should separate different blocks with empty lines. So space should be between functions, classes etc. Also it's nice to separate blocks inside one function.
function some_funct() {
return TRUE;
}
function main() {
$test = some_funct();
if ($test) {
for ($i = 0; $i < 10; $i++) {
if ($check = some_funct()) {
$result[] = $i * 2;
}
else {
$result[] = $i * 3;
}
}
}
return $result;
}
function some_funct() {
return TRUE;
}
function main() {
$test = some_funct();
if ($test) {
for ($i = 0; $i < 10; $i++) {
if ($check = some_funct()) {
$result[] = $i * 2;
}
else {
$result[] = $i * 3;
}
}
}
return $result;
}
function some_funct() {
return TRUE;
}
function main() {
$test = some_funct();
if ($test) {
for ($i = 0; $i < 10; $i++) {
if ($check = some_funct()) {
$result[] = $i * 2;
}
else {
$result[] = $i * 3;
}
}
}
return $result;
}
Operators
All binary operators (operators that come between two values), such as +, -, =, !=, ==, >, etc. should have a space before and after the operator, for readability.
$a=($b+$c/2)!=$d;
$a = ($b + $c / 2) != $d;
String Concatenations
Always use a space between the dot and the concatenated parts to improve readability.
When you concatenate simple variables, you can use double quotes and add the variable inside; otherwise, use single quotes.
When using the concatenating assignment operator ('.='), use a space on each side as with the assignment operator.
$string='Foo'.$bar;
$string.='Foo'.'bar';
$string = 'Foo' . $bar;
$string = 'foo' . 'bar';
$string = "Foo $bar";
$string .= 'Foo';
$string .= $bar;
$string .= baz();
Quotes
PHP doesn't have strict rules about which quotes to use, like for example JAVA.
If you are following for example Drupal coding standards - we should use
single quotes. There are 2 exceptions:
1. Deliberate in-line variable interpolation.
2. Translated strings where one can avoid escaping single quotes by enclosing the string in double quotes.
$foo = 'Hello, world!';
$bar = "Hello, $name!";
$val = "Hello, it's nice to meet you!";
// Instead of 'Hello, it\'s nice to meet you!'
Casting
Put a space between the (type) and the $variable in a cast:
(int) $mynumber
Control Structures
Control statements should have one space between the control keyword and
opening parenthesis, to distinguish them from function calls.
Always use curly braces even in situations where they are technically
optional. Having them increases readability and decreases the likelihood
of logic errors being introduced when new lines are added. The opening
curly should be on the same line as the opening statement, preceded by
one space. The closing curly should be on a line by itself and indented to
the same level as the opening statement.
if (condition1 || condition2) {
action1;
}
elseif (condition3 && condition4) {
action2;
}
else {
defaultaction;
}
switch ($val) {
case 'foo':
action1;
break;
case 'bar':
action2;
break;
default:
defaultaction;
}
<?php if (!empty($item)): ?>

<?php print $item; ?>

<?php endif; ?>
<?php foreach ($items as $item): ?>

<?php print $item; ?>

<?php endforeach; ?>
Line length and wrapping
if ($something['with']['something']['else']['in']['here'] == mymodule_check_something($whatever['else'])) {
...
}
if (isset($something['what']['ever']) && $something['what']['ever'] > $infinite && user_access('galaxy')) {
...
}
// Non-obvious conditions of low complexity are also acceptable, but should
// always be documented, explaining WHY a particular check is done.
if (preg_match('@(/|\\)(\.\.|~)@', $target) && strpos($target_dir, $repository) !== 0) {
return FALSE;
}
Line length and wrapping
Control structure conditions should also NOT attempt to win the Most Compact Condition In Least Lines Of Code Award™:
// DON'T DO THIS!
if ((isset($key) && !empty($user->uid) && $key == $user->uid) ||
(isset($user->cache) ? $user->cache : '') == ip_address() ||
isset($value) && $value >= time())) {
...
}
Instead, it is recommended practice to split out and prepare the conditions separately, which also permits documenting the underlying reasons for the conditions:
// Key is only valid if it matches the current user's ID, as otherwise other
// users could access any user's things.
$is_valid_user = (isset($key) && !empty($user->uid) && $key == $user->uid);
// IP must match the cache to prevent session spoofing.
$is_valid_cache = (isset($user->cache) ? $user->cache == ip_address() : FALSE);
// Alternatively, if the request query parameter is in the future, then it
// is always valid, because the galaxy will implode and collapse anyway.
$is_valid_query = $is_valid_cache || (isset($value) && $value >= time());
if ($is_valid_user || $is_valid_query) {
...
}
Function Calls
Functions should be called with no spaces between the function name, the opening parenthesis, and the first parameter; spaces between commas and each parameter, and no space between the last parameter, the closing parenthesis, and the semicolon. Here's an example:
$var = foo($bar, $baz, $quux);
Function Declarations
Arguments with default values go at the end of the argument list. Always attempt to return a meaningful value from a function if one is appropriate.
function funstuff_system($field, $flag = TRUE) {
if ($flag) {
$system['description'] = t("This module inserts funny text into posts randomly.");
}
return $system[$field];
}
Arrays
Arrays should be formatted with a space separating each element (after the comma), and spaces around the => key association operator, if applicable:
$some_array = array('hello', 'world', 'foo' => 'bar');
Note that if the line declaring an array spans longer than 80 characters (often the case with form and menu declarations), each element should be broken into its own line, and indented one level:
$form['title'] = array(
'#type' => 'textfield',
'#title' => t('Title'),
'#size' => 60,
'#maxlength' => 128,
);
$form['title'] = array(
'#type' => 'textfield',
'#title' => t( 'Title' ),
'#size' => 60,
'#maxlength' => 128,
);
Note the comma at the end of the last array element; This is not a typo! It helps prevent parsing errors if another element is placed at the end of the list later.
Naming Conventions
Functions should be named using lowercase, and words should be separated with an underscore. Don’t abbreviate names un-necessarily; let the code be unambiguous and self-documenting.
Variables should be named using lowercase, and words should be separated either with uppercase characters or with an underscore. Be consistent; do not mix camelCase and snake_case variable naming inside a file.
function some_name($some_variable) {
...
}
Constants should always be all-uppercase, with underscores to separate words. (This includes pre-defined PHP constants like TRUE, FALSE, and NULL.)
define('DOING_AJAX', TRUE);
Comments and Documentation
/**
* Small description.
*
* Longer description can go here, if necessary.
*
* @param string $name
* User name.
* @param int $age
* User's age.
* @param bool $married
* (Optional) Defines user's marital status.
* Default to FALSE - not married.
*
* @return bool
* Returns TRUE if all went fine.
*/
function some_user_function($name, $age, $married = FALSE) {
// Check user is adult.
if ($age < LEGAL_ADULT) {
// @todo Show othe image.
}
}


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure do
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During this 8 weeks of learning how to code, I have heard the word "Recursion" again and again. However, maybe its becasue of the complexity of this topic, I havn't yet offcially encountered it in programming. Thus this week, out of curiosity, I've decided to do some research and understand the idea of recursion in the programming language.
Recursive programming is the process of progressively reducing a problem in to easier to solve versions of itself. It is a lot like a mathmetical function. Except it calls a function from within that same function.
Every recursive function tends to: - take a list to process, or some other structure, or problem domain - deal with the current point/step - call itself on the remainder(s)/subdomain(s) - combine or use the results of the subdomain work
Let's take the real world 'operation' of cutting up a pizza. You've taken the pizza out of the oven and in order to serve it up you have to cut it in half, then cut those halves in half, then again cut those resultant halves in half. The operation of cutting the pizza you performing again and again until you've got the result you want (the number of slices). Let's say that an uncut pizza is a slice itself.
def cut_pizza(existing_slices, desired_slices) if existing_slices != desired_slices # we don't have enough slices yet to feed everyone, so # we're cutting the pizza slices, thus doubling their number new_slices = existing_slices * 2 # and this here is the recursive call cut_pizza(new_slices, desired_slices) else # we have the desired number of slices, so we return # here instead of continuing to recurse return existing_slices end end pizza = 1 # a whole pizza, 'one slice' cut_pizza(pizza, 8) # => we'll get 8
So the real world operation is cutting a pizza, and the recursion is doing the same thing over and over until you have what you want. Other tasks you'll find that can use recursive functions include:
- Calculating compound interest over a number of months.
- Looking for a file on a file system
It's simply programming mechanics, a way of cleverly removing duplication.


| Attribut | Type | Description | Info |
|---|---|---|---|
| beginDate/endDate | dateObject / momentObject | Define the begin and the end of the event | |
| name | String | Define the name of the events | The name will appear at begin of event and begin of all week |
| color | String (#hexColor) | Define the color of the event | Per default: #0061ff (blue) |


HTML5, CSS3, jQuery, Bootstrap, Node.js, Angular.js
Recent Course Information
This course provides both ‘theory’, e.g., web design and e-commerce and ‘practice’, e.g., HyperText Markup Language (HTML), Cascading Style Sheets (CSS), and JavaScript to train students to create web pages. Students will develop web pages with current technologies and practices. In addition, hands-on practice, website case projects, and web research are emphasized in this class.
Topics: HTML basics, CSS and CSS3, visual elements and graphics, web design principles, page layout, mobile design, tables and forms, multimedia, e-commerce, web promotion, JavaScript and jQuery.
Project
Develop a functional website based on the instructions. The grading rubrics include the structure and design of pages, accessibility and usability, group presentation, and techniques used in the project.


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I am a software product manager and data scientist at the Air Quality Management District, a government agency that monitors air quality in the Bay Area. I love working with data and creating user friendly web apps and data visualizations for government employees to complete their work. I am driven by a fascination with intuitive interfaces and design. In my spare time, I host a web series called Common Sense TV that discusses current affairs and contemporary media and entertainment. I also ocassionally fiddle with creating wearable technology (a dress I worked on was exhibited in New York Fashion Week) and have previously launched a mobile fashion app called Stylematic as well as a citizen journalism app called Newsfly.


Butterfly Life Cycle
Stage 1:The Egg
Eggs are laid on plants by the adult female butterfly. These plants will then become the food for the
hatching caterpillars.
Eggs can be laid from spring, summer or fall. This depends on the species of butterfly. Females lay a lot of
eggs at once so that at least some of them survive.
Butterfly eggs can be very small.
Stage 2:The Caterpillar
The next stage is the larva. This is also called a caterpillar if the insect is a butterfly or a moth.
The job of the caterpillar is to eat and eat and eat. As the caterpillar grows it splits its skin and sheds
it about 4 or 5 times. Food eaten at this time is stored and used later as an adult.
Caterpillars can grow 100 times their size during this stage. For example, a monarch butterfly egg is the
size of a pinhead and the caterpillar that hatches from this tiny egg isn't much bigger. But it will grow up
to 2 inches long in several weeks.
Stage 3:The Pupa
When the caterpillar is full grown and stops eating, it becomes a pupa. The pupa of butterflies is also
called a chrysalis.
Depending on the species, the pupa may suspended under a branch, hidden in leaves or buried underground. The
pupa of many moths is protected inside a coccoon of silk.
This stage can last from a few weeks, a month or even longer. Some species have a pupal stage that lasts for
two years.
It may look like nothing is going on but big changes are happening inside. Special cells that were present
in the larva are now growing rapidly. They will become the legs, wings, eyes and other parts of the adult
butterfly. Many of the original larva cells will provide energy for these growing adult cells.
Stage 4:The Butterfly
The adult stage is what most people think of when they think of butterflies. They look very different from
the larva. The caterpillar has a few tiny eyes, stubby legs and very short antennae. The adults have long
legs, long antennae, and compound eyes. They can also fly by using their large and colorful wings. The one
thing they can't do is grow.
The caterpillar's job was to eat. The adult's job is to mate and lay eggs. Some species of adult butterflies
get energy by feeding on nectar from flowers but many species don't feed at all.
Flying comes in handy. The adult female can easily fly from place to place to find the right plant for its
eggs. This is important because caterpillars can't travel far.
Most adult butterflies live only one or two weeks, but some species hibernate during the winter and may live
several months.
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Simple math with Angular:
5 * 7 = {{5*7}}
There is no JavaScript involved. Just HTML. The code looks like this:


|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object org.apache.ws.jaxme.sqls.impl.PartsImpl
public abstract class PartsImpl
| Constructor Summary | |
|---|---|
protected |
PartsImpl(Statement pStatement)
|
| Method Summary | |
|---|---|
protected void |
add(java.lang.Object o)
|
void |
addPart()
Inserts a NULL value. |
void |
addPart(boolean pBoolean)
Inserts a boolean value, which will be inserted as the word TRUE , or FALSE , respectively. |
void |
addPart(byte pByte)
Inserts a byte value, which will be inserted without quotes. |
void |
addPart(Case pCase)
Inserts a "case foo when x then a when y then b else c end" clause. |
void |
addPart(ColumnReference pColumn)
Inserts a column reference. |
void |
addPart(ColumnReference[] pColumns)
Inserts a set of column references. |
void |
addPart(double pDouble)
Inserts a double value, which will be inserted without quotes. |
void |
addPart(Expression pExpression)
Inserts an arithmetic expression. |
void |
addPart(float pFloat)
Inserts a float value, which will be inserted without quotes. |
void |
addPart(Function pFunction)
Inserts a function. |
void |
addPart(int pInt)
Inserts an int value, which will be inserted without quotes. |
void |
addPart(long pLong)
Inserts a long value, which will be inserted without quotes. |
void |
addPart(SelectStatement pStatement)
Inserts a subselect. |
void |
addPart(short pShort)
Inserts a short value, which will be inserted without quotes. |
void |
addPart(java.lang.String pString)
Inserts a String. |
void |
addPart(Value pValue)
Inserts a constant value. |
void |
addPlaceholder()
Inserts a placeholder. |
void |
addRawSQLPart(java.lang.String pRawSQL)
Inserts raw SQL code. |
Expression |
createDIFFERENCE()
Creates an arithmetic difference. |
Expression |
createPRODUCT()
Creates an arithmetic product. |
Expression |
createQUOTIENT()
Creates an arithmetic quotient. |
Expression |
createSUM()
Creates an arithmetic sum. |
int |
getNumParts()
Returns the number of parts. |
java.util.Iterator |
getParts()
Returns an Iterator to the parts that have been added. |
Statement |
getStatement()
Returns the statement, to which the part belongs. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface org.apache.ws.jaxme.sqls.Parts |
|---|
getMaximumParts, getMinimumParts |
| Constructor Detail |
|---|
protected PartsImpl(Statement pStatement)
| Method Detail |
|---|
protected void add(java.lang.Object o)
public Statement getStatement()
public void addPart(Value pValue)
Parts
Inserts a constant value.
addPart
in interface Parts
public void addPart(ColumnReference pColumn)
Parts
Inserts a column reference.
addPart
in interface Parts
public void addPart(ColumnReference[] pColumns)
Parts
Inserts a set of column references.
addPart
in interface Parts
public void addPart(SelectStatement pStatement)
Parts
Inserts a subselect.
addPart
in interface Parts
public void addPart(java.lang.String pString)
Parts
Inserts a String. The String will be properly escaped.
addPart
in interface Parts
public void addPart()
Parts
Inserts a NULL value.
addPart
in interface Parts
public void addPart(byte pByte)
Parts
Inserts a byte value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(int pInt)
Parts
Inserts an int value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(long pLong)
Parts
Inserts a long value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(short pShort)
Parts
Inserts a short value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(float pFloat)
Parts
Inserts a float value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(double pDouble)
Parts
Inserts a double value, which will be inserted without quotes.
addPart
in interface Parts
public void addPart(boolean pBoolean)
Parts
Inserts a boolean value, which will be inserted as the word
TRUE
, or FALSE
, respectively.
addPart
in interface Parts
public void addPart(Function pFunction)
Parts
Inserts a function.
addPart
in interface Parts
public void addPart(Expression pExpression)
Parts
addPart
in interface Parts
public void addPlaceholder()
Parts
Inserts a placeholder.
addPlaceholder
in interface Parts
public void addRawSQLPart(java.lang.String pRawSQL)
Inserts raw SQL code.
addRawSQLPart
in interface Parts
public int getNumParts()
Parts
Returns the number of parts.
getNumParts
in interface Parts
public java.util.Iterator getParts()
Parts
Returns an Iterator to the parts that have been added.
getParts
in interface Parts
public void addPart(Case pCase)
Parts
addPart
in interface Parts
public Expression createSUM()
Parts
createSUM
in interface Parts
public Expression createPRODUCT()
Parts
createPRODUCT
in interface Parts
public Expression createDIFFERENCE()
Parts
createDIFFERENCE
in interface Parts
public Expression createQUOTIENT()
Parts
createQUOTIENT
in interface Parts
|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |


Element Environments
New environment
New Environment
Create new environment for element {{element_name}} {{#element_alias}} ({{.}}){{/element_alias}}
Environment
Environment Name
Select the environment you want to add.
Description
Optional environment description.
Add environment
Cancel
Upload new environment
Edit environment


Andre Weiner, Fabian Gabriel, Darshan Thummar, Richard Semaan
TU Braunschweig, Institute of Fluid
Mechanics
CFD
ML
primary data: scalar/vector fields, boundary fields, integral values
# log.rhoPimpleFoam Courant Number mean: 0.020065182 max: 0.77497916 deltaT = 6.4813615e-07 Time = 1.22219e-06 PIMPLE: iteration 1 diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 DILUPBiCGStab: Solving for Ux, Initial residual = 0.0034181127, Final residual = 6.0056507e-05, No Iterations 1 DILUPBiCGStab: Solving for Uy, Initial residual = 0.0052004883, Final residual = 0.00012352706, No Iterations 1 DILUPBiCGStab: Solving for e, Initial residual = 0.06200185, Final residual = 0.0014223046, No Iterations 1 limitTemperature limitT Lower limited 0 (0%) of cells limitTemperature limitT Upper limited 0 (0%) of cells limitTemperature limitT Unlimited Tmax 329.54945 Unlimited Tmin 280.90821
Checking geometry... ... Mesh has 2 solution (non-empty) directions (1 1 0) All edges aligned with or perpendicular to non-empty directions. Boundary openness (1.4469362e-19 3.3639901e-21 -2.058499e-13) OK. Max cell openness = 2.4668495e-16 OK. Max aspect ratio = 3.0216602 OK. Minimum face area = 7.0705331e-08. Maximum face area = 0.00033983685. Face area magnitudes OK. Min volume = 1.2975842e-10. Max volume = 6.2366859e-07. Total volume = 0.0017254212. Cell volumes OK. Mesh non-orthogonality Max: 60.489216 average: 4.0292071 Non-orthogonality check OK. Face pyramids OK. Max skewness = 1.1453509 OK. Coupled point location match (average 0) OK.
secondary data: log files, input dictionaries, mesh quality metrics, ...
Example: creating a surrogate or reduced-order model based on numerical data.
Example: creating a space and time dependent boundary condition based on numerical or experimental data.
Example: creating closure models based on numerical data.
Example: active flow control or shape optimization.
Creating a mapping from features to labels based on examples.
Finding patterns in unlabeled data.
Create an intelligent agent that learns to map states to actions such that cumulative rewards are maximized.
$\rightarrow$ mathematical, physical, numerical modeling
A single-phase simulation approach to compute the mass transfer at rising bubbles
micro reactor
size: millimeter
source: SPP 1740
prediction of
bubble column reactor
size: meter
source: R. M. Raimundo, ENI
$d_b=1~mm$ water/oxygen at room temperature
$\delta_h/\delta_c$ typically 10 ... 100
feasible simulations up to $Pe\approx 10000$ (3D, HPC)
Why we might be interested in a simplified simulation approach:
1. Two-phase flow simulation (Volume-of-Fluid)
2. Parametrization of shape and interfacial velocity
3. Geometry generation and export (STL format)
4. Single phase mesh
5. Flow solution
6. Species transport
Two-phase velocity field (left half) versus single-phase velocity field (right half); speed-up of 20-40x with 120x finer mesh at surface.
Mesh motion and zoom view of concentration boundary layer for $Re=569$ and $Sc=100$.
Global Sherwood number $Sh$ for two different mesh resolutions (3250 and 6500 cells/diameter). ~7h, serial, 2.4 GHz.
Modal analysis of transonic shock buffets on a NACA0012 airfoil
Slice of local Mach number $Ma$, 3D, $\alpha=4^\circ$.
Things we might be interested in:
Definition of data matrices:
$$ \mathbf{X} = \left[ \begin{array}{cccc} | & | & & | \\ \mathbf{x}_1 & \mathbf{x}_2 & ... & \mathbf{x}_{N-1} \\ | & | & & | \\ \end{array}\right],\quad \mathbf{X}^\prime = \left[ \begin{array}{cccc} | & | & & | \\ \mathbf{x}_2 & \mathbf{x}_3 & ... & \mathbf{x}_{N} \\ | & | & & | \\ \end{array}\right] $$
$\mathbf{x}_n$ - state vector snapshot at timestep $n$
$$ \mathbf{x}_{n+1} = \mathbf{Ax}_n $$
$\mathbf{A}\in \mathbb{C}^{M\times M}$ - best-fit linear operator
How to compute $\mathbf{A}$?
$$ \underbrace{[\mathbf{x}_2, ..., \mathbf{x}_N]}_{\mathbf{X}^\prime} = A \underbrace{[\mathbf{x}_1, ..., \mathbf{x}_{N-1}]}_{\mathbf{X}} $$
$$ \mathbf{X}^\prime = \mathbf{AX} \rightarrow A\approx \mathbf{X}^\prime\mathbf{X}^{-1} = \mathbf{X}^\prime\mathbf{V\Sigma}^{-1}\mathbf{U}^T $$
best-fit (least squares) linear operator
Use of eigen-decomposition $\mathbf{A} = \mathbf{\Phi\Lambda\Phi}^{-1}$:
$$ \mathbf{x}_N = \mathbf{\Phi\Lambda}^{N-1}\mathbf{\Phi}^{-1} \mathbf{x}_1 $$
DMD spectrum for 2D and 3D datasets/simulations; $\bar{f}=2\pi c f/U_\infty$.
Real parts of DMD buffet mode and first harmonic; $u$ and $v$ are the velocity components.
DMD mode at approx. $20f_{buffet}$, $u$-component.
Active control of the flow past a cylinder
https://github.com/darshan315/flow_past_cylinder_by_DRL
https://github.com/FabianGabriel/Active_flow_control_past_cylinder_using_DRL
Flow past a circular cylinder at $Re=100$.
Things we might be interested in:
Can we reduce drag and lift forces?
Proximal policy optimization (PPO) workflow (GAE - generalized advantage estimate).
Policy networks outputs parameters of probability density function.
reward at time $t$
$$ R_t = r_0 - \left( r_1 c_D + r_2 |c_L| + r_3 |\dot{\theta}| + r_4 |\ddot{\theta}| \right) $$
long-term consequences
$$ G_t = \sum\limits_{l=0}^{N_t-t} \gamma^l R_{t+l} $$
learning what to expect in a given state - value function loss
$$ L_V = \frac{1}{N_\tau N_t} \sum\limits_{\tau = 1}^{N_\tau}\sum\limits_{t = 1}^{N_t} \left( V(s_t^\tau) - G_t^\tau \right)^2 $$
Was the selected action a good one?
$$\delta_t = R_t + \gamma V(s_{t+1}) - V(s_t) $$ $$ A_t^{GAE} = \sum\limits_{l=0}^{N_t-t} (\gamma \lambda)^l \delta_{t+l} $$
make good actions more likely - policy objective function
$$ J_\pi = \frac{1}{N_\tau N_t} \sum\limits_{\tau = 1}^{N_\tau}\sum\limits_{t = 1}^{N_t} \left( \frac{\pi(a_t|s_t)}{\pi^{old}(a_t|s_t)} A^{GAE,\tau}_t\right) $$
Python/PyTorch
Implementation follows closely chapter 12 of Miguel Morales's Grokking Deep Reinforcement Learning
C++/OpenFOAM/PyTorch
Comparison of uncontrolled, open-loop controlled, and closed-loop controlled drag.
Angular velocity for open and closed-loop control.
Variable inlet velocity/Reynolds number $Re(t) = 250 + 150\mathrm{sin}(\pi t)$
Drag coefficient for transient inlet velocity: uncontrolled and controlled.
Where to go from here:


Charts
Other charts
Statistics of requests
French (http, sql, spring, jsp)
German (http, sql, spring, jsp)
Portuguese (sql, system information)
Http errors and logs of errors
Current requests
System informations
Threads
Caches of data (ehcache)
Jobs (quartz)
Http sessions
Memory histogram
MBeans
Processes
Drill-down (and ejb/spring/guice/services components)
Zoom on chart
Mysql process
Oracle long requests
Pdf
Online help


Economics: nurturing bubble markets.
Magic The Gathering always lives in a bubble.
Cards can be sold for tens to hundreds of dollars.
Magic stakeholders have understood that this kind of bubble can burst.
They have:
- analysed bubbles of the same type
- implemented strategies to entertain the bubble:
- print boosters depending on the market booster price, to make booster price constant
- create a second, demand generating market: “pro-league”. In “pro-league”, only new cards can be played
- market researche on what type of card design/features is liked
- differentiate reeditions from old editions to avoid “sad investors”
Note:
This strategy is not specific to Magic. The “banlist” in Yu-Gi-Oh TCG is a good example of bubble entertainment.
Konami controls both offer and demand.
Actionable:
Building this kind of market is financially very interesting.
As a consumer, avoid these kinds of market at all costs.


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This page demostrates the page content loading via ajax. To try it please click on the sidebar menu items.
NOTE: This sample does not work if you opened the page directly from the browser since ajax calls require to receive the response from a web server.


My name's Atheer Musa. I'm a 23 year old graduate, completing a degree in Electronic Engineering with Management from Kings College University.
Whether it’s building Augmented reality projects, coding away at a hackathon or hosting a weekly radio show about it, my life always finds itself revolving around technology! One thing I enjoy doing most is diving in headfirst and taking on new challenges, learning new skills ranging from iOS development and Unity to (very) recently HTML, CSS and Javascript!
As I embark on the next stage of my life and begin building a career in technology in this uncertain world, I believe it's more important than ever to keep that feeling of wonder and look to the future!
There are three statements about me below. Two of them are true but one of them is a lie! Select the one you think is a lie and click submit:


Apigee Collections Sample App
This app show the basics of working with collections using the Apigee JavaScript SDK. Click each button to execute an API call and see its response. For this app to work properly you must execute the calls sequentially.
To view the code and more detailed comments on how this app operates, open js/index.js.
- Create an empty 'books' collection
This creates an empty collection to hold entities of type 'book'
Create - Add entities to the collection
Now we add some books by Hemmingway. This will add a single book entity then add an array of book entities.
Add - Retrieve the first 10 entities
By default, we return 10 entities but you can request more. This will retrieve the first 10 book entities in our collection.
Retrieve - Retrieve the next page of entities
Since the first retrieve returned just the first 10 entities, we'll use the 'cursor' from the response to get the next 10.
Retrieve Next - Delete some entities
Last, we delete some entities from the collection. This will delete the first 5 entities in the collection and delete just the entity with the title 'For Whom the Bell Tolls'
Delete


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Since the content of Development Tool's tags are going to be replaced, it can be useful to initiate their content to setup a default value for the tags in case they fail to load.


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