Create options
Creates a WGPU adapter
Creates a WGPU context
Creates a WGPU device
Creates a WGPU swapchain
Called in case of an device error
The error message
Resolves the texture format of the swapchain
Update the swapchain texture
Create the renderer
Destroy this Object
Calls each of the listeners registered for a given event.
Return an array listing the events for which the emitter has registered listeners.
Flushes all pending operations such as buffer copies
The WGPU adapter
The rendering surface to render into TODO: allow other targets such as FBOs
The WGPU canvas context
The WGPU device
The height of the rendering surface
The queue commander
The WGPU swapchain
The texture format of the swapchain
The swapchain texture
The width of the rendering surface
Return the number of listeners listening to a given event.
Return the listeners registered for a given event.
Add a listener for a given event.
Add a one-time listener for a given event.
Process the uniform update queue
The uniform queue to process
Remove all listeners, or those of the specified event.
Remove the listeners of a given event.
Render a frame
The frame to render
Resize the renderer
The destination width after resize
The destination height after resize
Generated using TypeDoc


{% extends "base.html" %}
{% load static %}
{% block title %}
Leading Web Application Development Company | CraftTechSolution, Kenya
{% endblock %}
{% block navbar %}
{% include "navbar.html" %}
{% endblock %}
{% block slideshow %}
{% include "slideshow.html" %}
{% endblock %}
{% block content %}
We develop Mobile Apps for all platforms.Our apps cuts accross all sectors of economy. Need an app developed to solve a problem for your organisation?
Craft Tech Solution brings you the benefit of over 3 years experience. We know exactly what is required, and when it needs to be done. We observe the latest market trends and give you the best up-to-date solution.
We help you make money because of our professionally designed websites that are search-engine optimised (SEO-friendly).
The best part is we deliver high quality work at very highly favourable prices. Contact us by our live chat system and you will find that prices are truly affordable


quazLayout
quazLayout is an example layout for general webpages.
Using PHP, it has support for a multi-level menu on the left
for navigation. It is used in several of the coder's websites,
including www.TheLogicalHairs.com
The CSS file has some classes for laying out pictures in articles.
In this article we have a picture using the class "article-pic-left"


Topping options- Extra cheese, Pepperoni, veggies, mushrooms, pepper, chicken
Total cost of the order:


{% extends "base.html" %} {% block title %}Terms of Service{% endblock %} {% block description %}This page describes terms of TLDRify service{% endblock %} {% block content %}
This agreement (the "Agreement") is entered into by and between you ("you") and TLDRify, ("TLDRify" or "we") regarding your use of the tldrify.com service (the "Service"). By the using the Service you are entering into this agreement with TLDRify and indicating that you agree to be bound by these terms and conditions. If you do not agree with these terms and conditions as stated, you may not use the Service.
THE INFORMATION CONTAINED IN THIS WEBSITE IS FOR GENERAL INFORMATION PURPOSES ONLY. THE INFORMATION IS PROVIDED BY THE SERVICE AND WHILE WE ENDEAVOUR TO KEEP THE INFORMATION UP TO DATE AND CORRECT, WE MAKE NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, ABOUT THE COMPLETENESS, ACCURACY, RELIABILITY, SUITABILITY OR AVAILABILITY WITH RESPECT TO THE WEBSITE OR THE INFORMATION, PRODUCTS, SERVICES, OR RELATED GRAPHICS CONTAINED ON THE WEBSITE FOR ANY PURPOSE.
IN NO EVENT WILL WE BE LIABLE FOR ANY LOSS OR DAMAGE INCLUDING WITHOUT LIMITATION, INDIRECT OR CONSEQUENTIAL LOSS OR DAMAGE, OR ANY LOSS OR DAMAGE WHATSOEVER ARISING FROM LOSS OF DATA OR PROFITS ARISING OUT OF, OR IN CONNECTION WITH, THE USE OF THIS WEBSITE.
 WE HAVE NO CONTROL OVER THE NATURE, CONTENT AND AVAILABILITY OF THOSE SITES. THE INCLUSION OF ANY LINKS DOES NOT NECESSARILY IMPLY A RECOMMENDATION OR ENDORSE THE VIEWS EXPRESSED WITHIN THEM.
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The service provided by TLDRify may be used for lawful purposes only. Transmission, storage or presentation of any information, data or material in violation of any United States federal, state or city law is prohibited. This includes, but is not limited to: copyrighted material, material we judge to be threatening or obscene, or material protected by trade secret and other statute. The subscriber agrees to indemnify and hold harmless TLDRify from any claims resulting from the use of service which damages the subscriber or any other party.
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The content displayed by the Service may come from external Websites, which are not under our responsibility. The Service may display content that some people find objectionable, inappropriate, or offensive. TLDRify takes no responsibility for the content type of any site displayed or otherwise linked to by the Service.


Click the menu button in the header to toggle the menu
Click the menu button in the header to toggle the menu
Collapsed menu items demo
Click the menu button in the header to toggle the menu
Collapsible lists demo
Click the menu button in the header to toggle the menu
Nested lists demo
All your favorites from aarkvarks to zebras.
Fresh colors from the magic rainbow.
Everything from cars to planes.


chaos
Contents
3.8. chaos#
3.8.1. Normal forms of Hopf bifurcations#
pitchfork: $\(\dot{x} = \lambda x - x^3\)$
subcritical pitchfork: \(\dot{x} = \lambda x + x^3\)
saddle node (turning point): \(\dot{x} = \lambda - x^2\)
transcritical: \(\dot{x} = \lambda x - x^2\)
3.8.2. important figs#
period-doubling (flip bifurcation) \(f = \mu x (1-x) (f = \mu sin (\pi x) \) is similiar)
inverse tangent bifurcation - unstable and stable P-3 orbits coalesce, move slightly off bisector and becomes chaotic
pendulum
energy surface - trajectories run around the surface, not down it
Conservative systems: 6.5
study Hamiltonian p. 187-188
Pendulum: 6.7
dynamics - study of things that evolve with time
chaos - deterministic, aperiodic, sensitive, long-term prediction impossible
phase space - has coordinates \(x_1,...,x_n\)
phase portrait - variable x-axis, derivative y-axis
bifurcation diagram - parameter x-axis, steady state y-axis
draw separate graphs for these
first check - look for fixed points
for 1-D, if f’ \(<\) 0 then stable
stable f.p. = all possible ICs in a.s.b.f.n. result in trajectories that remain in a.s.b.f.n. for all time
asymptotically stable f.p. - stable and approaches f.p. as \(t\ra\infty\)
hyperbolic f.p. - eigenvals aren’t strictly imaginary
bifurcation point of f.p. - point where num solutions change or phase portraits change significantly
globally stable - stable from any ICs
autonomous = f is a function of x, not t
we can always make a system autonomous by having \(x_n\) = t, so \(\dot{x_n}\) = 1
dimension = number of 1st order ODEs, dimension of phase-space
existence and uniqueness thm: if \(\dot{x}\) and \(\dot{x}'\) are continuous, then there is some unique solution
linearization - used to find stability of f.p.s
- \[\begin{split} \dot{x} = f(x) &\\ \text{define }\delta x = (x-\bar{x}) \\ \dot{\delta x} = \frac{d}{dt}(x-\bar{x}) = \dot{x} = f(x) = f(\bar{x}+\delta x) \\ \dot{\delta x} =\cancelto{0}{f(\bar{x})} + \delta x f'(\bar{x}) + \cancelto{\text{0 by HGT iff f'!=0}}{O(x^2)} \\ \dot{\delta x} = \delta x f'(\bar{x}) \to \text{ now solve FOLDE} \\ \end{split}\]
solving Hopf: use polar to get \(\dot{\rho}, \dot{\theta}\)
multiply one thing by cos, one by sin, then add
\( \rho = \sqrt{x_1^2 + x_2^2} \\ \theta = tan^{-1}(\frac{x_2}{x_1})\)
Hysterisis curve - S-shaped curve of fixed branches - ruler getting larger - snap bifurcation - both axes are parameters
3.8.3. Systems of Linear ODEs#
solutions are of the form \(\underbar{x}(t) = \underbar{C}_1e^{\alpha_1 t} + \underbar{C}_2e^{\alpha_2 t}\)
Eigenspaces: \(E^S\) (stable), \(E^U\) (unstable), \(E^C\) (center - real part) - plot eigenvectors
how to solve these systems?
solve eigenvectors
positive real part - goes out
negative real part - goes in
bifurcation requires 0 as eigenvalue
has imaginary component: spiral / focus
purely imaginary - center = stable, but not a.s.
finite velocity = \(\frac{dRe(\alpha)}{d\lambda}\)
change coordinates to polar
for \(\lambda \geq 0\), solution is a stable L.C. (from either direction spirals into a circular orbit)
attracting - any trajectory that starts within \(\delta\) of \(\bar{\underbar{x}}\) evolves to \(\bar{\underbar{x}}\) as t \(\to \infty\) (it doesn’t have to remain within \(\delta\) at all times
stable (Lyapanov stable) - any trajectory that starts within \(\delta\) remains within \(\varepsilon\) for all time (\(\varepsilon\) is chosen first)
asymptotically stable - attracting and stable
hyperbolic f.p. - iff all eigenvals of the linearization of the nds about the f.p. have nonzero real parts \
3.8.4. Discrete Nonlinear Dynamical Systems#
functional iteration: \(x_{n+m} = f^m(x_n)\) (apply f m times)
fixed point: \(f(x^*)=x^*\)
f.p. stable if \(\|\frac{df}{dx}(x^*)\|<1\), unstable if \(>\) 1
check n-orbit by checking nth derivative: \(\frac{df^n}{dx}(x_i^*) = \prod_{i=1}^{n-1} \frac{df}{dx}(x_i^*)\)
period-doubling bifurcations
self-stability - orbit for which the stability-determining derivative is zero. This means that the max of the map and the point at which the max occurs are in the orbit.
type I intermittency - exhibited by inverse tangent bifurcation
Feigenbaum sequence - period-doubling path to chaos, keep increasing parameter until period is chaotic
\begin{center} \begin{tabular}{ | m{4cm} | m{4cm} | } \hline \multicolumn{2}{|c|}{3D Attractors} \ \hline Type of Attractor & Sign of Exponents \ \hline Fixed Point & (-, -, -)\ Limit Cycle & (0, -, -) \ Torus & (0, 0, -) \ Strange Attractor & (+, 0, -) \ \hline \end{tabular} \end{center}
homoclinic orbit - connects unstable manifold of saddle point to its own stable manifold
e.g. trajectory that starts and ends at the same fixed point
manifolds are denoted by a W (ex. \(W^S\) is the stable manifold)
heteroclinic orbit - connects unstable manifold of fp to stable manifold of another fp \
3.8.5. Conservative Systems#
\(F(x) = -\frac{dV}{dx}\) (by defn.)
\(m\ddot{x}+\frac{dV}{dx}=0\), multiply by \(\dot{x} \to \frac{d}{dt}[\frac{1}{2}m\dot{x}^2+V(x)]=0\)
so total energy \(E=\frac{1}{2}m\dot{x}^2+V(x)\)
motion of pendulum: \(\frac{d^2\theta}{dt^2}+\frac{g}{L}sin\theta=0\)
nondimensionalize with \(\omega=\sqrt{g/L}, \tau=\omega t \to \ddot{\theta}+sin\theta =0\)
can multiply this by \(\dot{\theta}\)
\(\omega\)-limit \(t \to \infty\)
\(\alpha\)-limit \(t \to -\infty\)
libration - small orbit surrounding center
system: \(\dot{\theta}=\nu\), \(\dot{\nu} = -sin\theta\)
<IP_ADDRESS>. Hamiltonian Dynamical System#
\(\dot{\underbar{x}}=\frac{\partial H}{\partial y}(\underbar{x},\underbar{y})\) , \(\dot{\underbar{y}}=-\frac{\partial H}{\partial x}(\underbar{x},\underbar{y})\) for some function H called the Hamiltonian
we can only have centers (minima in the potential) and saddle points (maxima)
separatrix - orbit that separates trapped and passing orbits
Poincare Benderson Thm - can’t have chaos in a 2D system
3.8.6. Ref#
\(\frac{\partial}{\partial x}(f_1 * f_2 * f_3) = \frac{\partial f_1}{\partial x} f_2 f_3 + \frac{\partial f_2}{\partial x} f_1 f_3 + \frac{\partial f_3}{\partial x} f_1 f_2\)
\(e^{\mu it} = cos(\mu t)+ isin(\mu t)\)
\(x = A e^{(\lambda + i)t} + B e^{(\lambda - i)t} \implies x = (A' sin(t) + B' cos(t)) e^{\lambda t} \) If we have \(\dot{x_1},\dot{x_2}\) then we can get \(x_2(x_1) with \frac{dx_1}{dx_2} = \frac{\dot{x_1}}{\dot{x_2}}\)
3.8.7. Benard Convection#
The Navier-Stokes Equations
Position
Differential element in configuration space
Time
3.8.8. Lorenz equations#
Lorenz was studying hurricanes
ODEs for 3 coefficients in larger system (others are pretty small
use stream functions
Navier-Stokes PDEs - conservation of momentum - derive these equations as project?
no-flow steady-state \(T(y) = T_B + (T_T-T_B)y\)
Lorenz (ODE’s): x,y,z are coefficients in Fourier expansion, not dimensions $\(\dot{x}(t) = -\sigma x+ \sigma y\)\( \)\(\dot{y}(t) = (\rho_o)x - y - xz\)\( \)\(\dot{z}(t) = -bz + xy\)$
\(p_o\) - proportional to size of system
b - aspect ration - related to height:width
Navier-Stokes
independent variables
Position (vector)
Time (scalar)
dependent variables
Density (scalar)
fixed points
\(b>0, \rho_0 > 0, \sigma>0\) - let b,\(\sigma\) be fixed
fixed point \((\bar{x},\bar{y},\bar{z})\) is constant
equations
\(\dot{\bar{x}}(t) = 0 = -\sigma \bar{x}+ \sigma \bar{y}\)
\(\dot{\bar{y}}(t) = 0 = (\rho_o) \bar{x} - \bar{y} - \bar{x}\bar{z}\)
\(\dot{z}(t) = 0 = -b\bar{z} + \bar{x}\bar{y}\)
doing some algebra we get
\(FP_0, \forall \rho_o\)
\(\bar{x} = 0\)
\(\bar{y} = 0\)
\(\bar{z} = 0\)
\(FP_+, \rho_o \geq 1\)
\(\bar{x} = +\sqrt{b (\rho_o-1)} \)
\(\bar{y} = +\sqrt{b (\rho_o-1)}\)
\(\bar{z} = \rho_o-1\)
\(FP_-, \rho_o \geq 1\)
\(\bar{x} = -\sqrt{b (\rho_o-1)} \)
\(\bar{y} = -\sqrt{b (\rho_o-1)}\)
\(\bar{z} = \rho_o-1\)
these equations have symmetry
replace \((x(t),y(t),z(t))\) by \((-x(t),-y(t)),z(t)) \to\) we get back the original equations
\( M= \begin{bmatrix} 1 & 2 & 3 & 4 & 5 \newline 3 & 4 & 5 & 6 & 7 \end{bmatrix} \)
3.8.9. Linearization of Lorenz Equations about FPs \(\bar{\underline{x}}\)#
\(\frac{d}{dt}\delta x(t) = \frac{\partial f}{\partial x}|_ \bar{\underline{x}}= -\sigma\)
\(\frac{d}{dt}\delta y(t) = \frac{\partial f_2}{\partial x}|_ \bar{\underline{x}}*\delta x(t) + \frac{\partial f_2}{\partial y}|_ \bar{\underline{x}}*\delta y(t) + \frac{\partial f_2}{\partial z}|_ \bar{\underline{x}}*\delta z(t) +...\) (higher order derivatives)
\( = (r-\bar{z})*\delta x(t) + -1*\delta y(t) + -\bar{x}*\delta z(t) + \delta x \delta z\)
do the same thing for \(\delta z(t)\)


Miguel Echeverria
My name is Miguel Echeverria and this is my first portfolio.
I am a 3rd year student at California State University, Long Beach. I major in Computer Science and minor in Cyber Security Applications.
Here are some of the projects that I have worked on for class! Click on each picture to see the GitHub Repository for each project.
Solitare Prime
upDate
Dungeon Crawler (I used Minecraft Dungeons as a placeholder)
Follow me on LinkedIn! Click on the logo to view my profile!
Checkout my work on GitHub! Click on the Octo Cat to view my profile!
One of my favorite places to photograph are Beaches! This is a picture of Laguna Beach, but I have yet to take my own photo!
One of my favorite things to do is streaming various games


QA Coordinator Guide
Role
The QA coordinator is ultimately responsible for making sure that quality assurance (QA) processes are occurring during each release window, and for other project related tasks.
The QA Coordinator has the following duties:
Establish and manage QA process, technologies, and methods
- Manage CI infrastructure
- Create and expand automated testing infrastructure
- Ensure committers are following testing procedures
Ensure codebase stability
- Cleanup obsolete branches
- Help with merge issues
- Setup and manage automated distributable builds
- Code cleanup
Organize community/committers
- Remain active on list
- Organize Technical meeting
- Encourage additional committers to join the project
- Manage crowdin translators - ensure join requests are dealt with
- Handle (security issue reports)[security.md], and notifications once handled
- Occasionally purge non-active committers, moving them to the emeritus list in the main pom, and removing their permissions in JIRA
Expand documentation
- Ensure documentation is build and published
- Expand documentation, and/or organize volunteer documentation tasks


App
Home
Blog
About
What is CSCI?
Why join?
Testimonials
Team
Staff&Volunteers
Board of Directors
Sponsors
FAQ
Contact
Hello, world!


BYU Header Tests
Header displays with no title
Header renders different tags in site-title slot
Testing
Testing
Testing
Header renders nested link in site-title slot
Components Demo Site
Header renders title and breadcrumb
College of Fine Arts and Communication
Components Demo Site
Header renders title and multiple breadcrubms
College of Fine Arts and Communication
School of Music
Components Demo Site
Header renders title and subtitle
Components Demo Site
Example Sub-Title
Header renders breadcrumbs, subtitle, and title
College of Fine Arts and Communication
School of Music
Components Demo Site
Example Sub-Title
Header renders just search
Testing
Header renders just action button
Components Demo Site
Apply
Header renders just user info
Components Demo Site
Sign In
Sign Out
Header renders search and action button
Components Demo Site
Apply
Header renders search and user info
Components Demo Site
Sign In
Sign Out
Header renders action button and user info
Components Demo Site
Apply
Sign In
Sign Out
Header renders action button, user info, and search
Components Demo Site
Apply
Sign In
Sign Out
Action button, user info, and search order doesn't matter
If all the above tests passed, then this test passed.


See some of your favorite characters from Hebrew school in a light you've never seen them—the grand King Ahaseurus, our heroes Queen Esther and Mordecai, and of course the notorious Haman!
Read here.Grab some Hamantaschen and listen to a track rich with deception, love, and bravery. All music and lyrics are written by Leonard Diamond and arranged by Frank Lindquist.
Listen now.Dr. Leonard Diamond is an accomplished psychiatrist, talented playwright, and loving father of four, grandfather of eleven, and great grandfather to ten beautiful children.
See more.


Ticket Registration
select Source-destination
{{rout.source}}-{{rout.destination}}
select ship
{{shi.shipname}}
Passenger Name
Passenger Age
Select Gender
Male
Female
Contact number


Home Page
arabelle hou
home
experience
about
blog
Hello! I am a software engineer currently working in Seattle, WA.


Home
Favorite Things
Hobbies and Interests
Interactive
Map It
Feedback
Contact
We Value Your Feedback!
Name and Email:
Name,Email
Feedback About This Portfolio:
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Submit
Previous Comments:


Rupee settles 28 paise down at 70.97 against US dollar
At the interbank foreign exchange market, the rupee opened at 70.80 and fell to 71.01 against the US dollar intra-day. The local unit finally settled at 70.97, down 28 paise over its previous closing.
by PTISnapping its three-session winning streak, the Indian rupee declined 28 paise on November 6 to close at 70.97 against the US dollar. However, weakening of the US dollar vis-a-vis other currencies overseas and easing crude oil prices restricted the fall, forex brokers said.
At the interbank foreign exchange market, the rupee opened at 70.80 and fell to 71.01 against the US dollar intra-day. The local unit finally settled at 70.97, down 28 paise over its previous closing.
The Indian rupee had closed at 70.69 against the US dollar on November 5.Special Thursday Expiry on 10th 7th Nov
Early Closure to The Great Diwali Discount. Last Chance to get Moneycontrol PRO for a year @ Rs. 289/- only
Coupon code: DIWALI


Content will expire after leaving the page. Make sure to copy it or mark it down somewhere before leaving the page.


Across: 5. Well known for spraying foam at you and me (6) 8. Old Greek left in place by chief (8) 9. Shingle from here? (7) 10. Had to endow (5) 11. Disturb Hilton art event (9) 13. Coffee gives energy to push in, thus (8) 14. Extra material needed for guests (6) 17. Has chopped wood (3) 19. Best spinner (3) 20. Most recent trial in US city (6) 23. Is that man a creature of the night? A monster! (8) 26. Leaked out after broken seams are put together (9) 28. Washed duck in shed (5) 29. Whisky rub may be in favour (7) 30. Infant toddles round Open University water feature (8) 31. Behind one grave (6) Down: 1. Resist having to stand after work (6) 2. Run and spit out vegetables! (7) 3. Preserve 500 cooked meals for festival (9) 4. Smells money within two seconds (6) 5. Admirer may be desperate to leave dance (8) 6. Left in a lot of compost (5) 7. Push north after sunset, understood? (8) 12. Rank argument! (3) 15. Advantage of being foreman? (5 4) 16. Piles of his tiny particles (8) 18. Bob turns pig-headed! (8) 21. Five leading characters lose CD in Lincoln (3) 22. Elton bursts on to pitch (3 4) 24. Light man played onside (6) 25. Concealing a beating! (6) 27. Nest for one year back in Ireland (5)


This module was created in response to: https://github.com/Vernacular-ai/dialogy/issues/9 we will ship functions to assist normalization of ASR output, we will refer to these as Utterances.
from typing import Any, List
import pytest
from dialogy import constants as const
from dialogy.preprocess.text.normalize_utterance import is_list_of_string, normalize
TEST_STRING = "hello world"
EXPECTED_OUTPUT = [TEST_STRING]
@pytest.mark.parametrize(
"utterance,expected",
[
([[{"transcript": TEST_STRING}]], EXPECTED_OUTPUT),
([{"transcript": TEST_STRING}], EXPECTED_OUTPUT),
([TEST_STRING], EXPECTED_OUTPUT),
(TEST_STRING, EXPECTED_OUTPUT),
],
)
def test_normalize_utterance(utterance: Any, expected: List[str]) -> None:
output = normalize(utterance)
assert output == expected
@pytest.mark.parametrize(
"utterance",
[
1,
[[{"teapot": TEST_STRING}]],
[{"teapot": TEST_STRING}],
[1, 2],
None,
],
)
def test_cant_normalize_utterance(utterance: Any) -> None:
with pytest.raises(TypeError):
_ = normalize(utterance)
@pytest.mark.parametrize(
"utterance,expected",
[
([[{"teapot": TEST_STRING}]], False),
([{"teapot": TEST_STRING}], False),
([1, 2], False),
(1, False),
(None, False),
],
)
def test_is_list_of_string(utterance: Any, expected: bool) -> None:
output = is_list_of_string(utterance)
assert output == expected


Don't let them get their way anymore!”


Show extra HTML elements based on changes in form elements. Useful in HTML prototyping.
This pattern shows HTML elements based on selection of a radio button or check box.
The "link" is made through a data attribute (data-show
) and the ID of the radio button/checkbox.
Note: you have to apply the initial state manually (add your hide
classes to the elements that should be hidden).
Try it!
This is data field 4
This is data field 5
This is data field 6
This pattern shows a linked box when an <option>
is selected
You selected red.
Use data-open-element
and data-element-to-be-opened
attributes with the same values to show a hidden HTML element.
| Header | Header | Header | Header |
|---|---|---|---|
| Data | Data | Data | Data |
| Data | Data | Data | Data |
| Data | Data | Data | Data |
©2013, Wolf's Little Store - Free to use under the MIT license.


This is a demo for project release workflow
This workflow will keep your releases organized.
This is a feature.


Type in passphrase to start memorizing:
You'll get notified when it's time to try again.
Press space when you are ready
If you haven't memorized your passphrase, don't close this window without writing it down first. This program won't save it for you.
Passphrases is a tool that helps you generate high-entropy passphrases and memorize them using a technique called spaced repetition.
Passphrases is open source software, released under the MIT license | source code
Passphrases does not collect any information or do anything over the Internet


Description: It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opp osed to using 'Content here, content here', making it look like readable English. Many des


Eyob Tamir
Hello Everyone!
My name is Eyob. I am originally from Ethiopia and moved to the USA in mid 2015.
Before I migrate to the USA I worked as sales and IT person in Ethiopia, Me and my wife are parents to a sweet three years girl and a one year old boy. Currently am working as independent truck owner. Mostly I do my job in the state of Washington and Oregon.
Place to visit
- England
- Russia
- China
- Greece
- Egypt
- Jaimca
- France
- Germany
- Spain
- South Africa


One ordered (<ol>) and one unordered (<ul>) HTML list:
More "Try it Yourself" examples below.
The <li> tag defines a list item.
The <li> tag is used in ordered lists, unordered lists , and in menu lists .
| Attribute | Value | Description |
|---|---|---|
| type | 1 A a I i disc square circle |
Specifies which kind of bullet point will be used |
| value | number | Specifies the value of a list item. The following list items will increment from that number (only for <ol> lists) |


Vince's Views
Review: Ye Shou Xing Jing (a.k.a. Beast Cops) Dir: Gordon Chan with Dante Lam Starring Michael Wong, Anthony Wong, Kathy Chow, and Sam Lee Chan.
Reviewed by Vince Yim
Proving that North American filmmakers can easily learn much from overseas film markets, director Gordon Chan (best known for a few Jackie Chan films including Thunderbolt) and first timer Dante Lam put together an entertaining package about the meeting of two cops running amok in Triad infested Hong Kong.  One of the main characters, Cheung, is played by Michael Wong, best known for his role in the John Woo's Once a Thief telefilm (and more recently, Knock Off…ugh). Cheung is a straight-laced cop who is imported to the police force in an anti-triad squad. Playing off of him is Tung, played by Anthony Wong, known for the villain role in John Woo's Hard-Boiled. Tung is the opposite of Cheung, the rogue cop that keeps a liaison with the Triads, leaving the open question of who's really in charge. The odd man out is Sam (played by Sam Lee Chan). Best described as the Hong Kong equivalent of Spud from Trainspotting, he is a young cop with weird hair, funny looking glasses, and odd attitudes towards sex (ie: appropriate condom substitutes). While a fun character that guarantees a few laughs during his screen time, he is ultimately a throwaway character. Unfortunately, this plays with the entire nature of the entire film. The film is trying to be too much in too short of a span of time (either that, or too much time is wasted to properly define the film). The film takes on a documentary style (reminiscent of Cops), interviewing each character. Then, the two main characters go off to the underground scene of nightclubs and take drugs and stuff (Cheung mistakes them for Chinese herbs). After some comic scenes where Cheung stumbles around in a drug-induced stupor, he falls in love with the Triad leader's girlfriend (played by Kathy Chow). Much later in the film we have Tung taking a handful of uppers and going on a suicide run to kill the new Triad leader. Sequences are set up in an almost haphazard fashion, with some elements left completely in the dust.  While the filmmakers could have easily used this as a character development device, it is instantly forgotten as Cheung graces the screen. Quickly jumping in transition from documentary to comedy to romance to Romero-esque horror, these sequences are well constructed by themselves. But as a whole, they ultimately fail to achieve balance. Documentary style interviews were an interesting insight into the character's lives, but ultimately feel out of place in the film. The scene where Tung takes on a demonic appearance after a machete fight with Triads is darkly comic and fun to watch, but out of context with the rest of the film (although it does justify the English title, Beast Cops). Stylistically, this film is incredible. Slow motion tracking reminiscent of John Woo's Hard-Boiled, strobe and handheld camera effects reminiscent of Wong Kar-Wai's Chungking Express, brilliant colours, and nice art direction make for a nice scenes. Unfortunately, they do not always make for a great film. While a fun film, it is not a great film. Still, it is worthy of a look if you can get a hold of it.
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Before Change
set_req = self.gateway.const.SetReq
brightness = self._brightness
if ATTR_BRIGHTNESS in kwargs and \
kwargs[ATTR_BRIGHTNESS] != self._brightness:
brightness = kwargs[ATTR_BRIGHTNESS]
percent = round(100 * brightness / 255)
self.gateway.set_child_value(
self.node_id, self.child_id, set_req.V_DIMMER, percent)
if self.gateway.optimistic:
// optimistically assume that light has changed state
self._brightness = brightness
self.update_ha_state()
After Change
set_req = self.gateway.const.SetReq
brightness = self._brightness
if ATTR_BRIGHTNESS not in kwargs or \
kwargs[ATTR_BRIGHTNESS] == self._brightness or \
set_req.V_DIMMER not in self._values:
return
brightness = kwargs[ATTR_BRIGHTNESS]
percent = round(100 * brightness / 255)
self.gateway.set_child_value(
self.node_id, self.child_id, set_req.V_DIMMER, percent)
if self.gateway.optimistic:
// optimistically assume that light has changed state
self._brightness = brightness
self._values[set_req.V_DIMMER] = percent
self.update_ha_state()
def _turn_on_rgb_and_w(self, hex_template, **kwargs):
Turn on RGB or RGBW child device.


/* This file is part of Ext JS 4 Copyright (c) 2011 Sencha Inc Contact: http://www.sencha.com/contact Commercial Usage Licensees holding valid commercial licenses may use this file in accordance with the Commercial Software License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Sencha. If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact. */ /** * Tracks what records are currently selected in a databound component. * * This is an abstract class and is not meant to be directly used. Databound UI widgets such as * {@link Ext.grid.Panel Grid} and {@link Ext.tree.Panel Tree} should subclass Ext.selection.Model * and provide a way to binding to the component. * * The abstract methods `onSelectChange` and `onLastFocusChanged` should be implemented in these * subclasses to update the UI widget. */ Ext.define('Ext.selection.Model', { extend: 'Ext.util.Observable', alternateClassName: 'Ext.AbstractSelectionModel', requires: ['Ext.data.StoreManager'], // lastSelected /** * @cfg {String} mode * Mode of selection. Valid values are: * * - **SINGLE** - Only allows selecting one item at a time. Use {@link #allowDeselect} to allow * deselecting that item. This is the default. * - **SIMPLE** - Allows simple selection of multiple items one-by-one. Each click in grid will either * select or deselect an item. * - **MULTI** - Allows complex selection of multiple items using Ctrl and Shift keys. */ /** * @cfg {Boolean} allowDeselect * Allow users to deselect a record in a DataView, List or Grid. * Only applicable when the {@link #mode} is 'SINGLE'. */ allowDeselect: false, /** * @property {Ext.util.MixedCollection} selected * A MixedCollection that maintains all of the currently selected records. Read-only. */ selected: null, /** * Prune records when they are removed from the store from the selection. * This is a private flag. For an example of its usage, take a look at * Ext.selection.TreeModel. * @private */ pruneRemoved: true, constructor: function(cfg) { var me = this; cfg = cfg || {}; Ext.apply(me, cfg); me.addEvents( /** * @event * Fired after a selection change has occurred * @param {Ext.selection.Model} this * @param {Ext.data.Model[]} selected The selected records */ 'selectionchange' ); me.modes = { SINGLE: true, SIMPLE: true, MULTI: true }; // sets this.selectionMode me.setSelectionMode(cfg.mode || me.mode); // maintains the currently selected records. me.selected = Ext.create('Ext.util.MixedCollection'); me.callParent(arguments); }, // binds the store to the selModel. bind : function(store, initial){ var me = this; if(!initial && me.store){ if(store !== me.store && me.store.autoDestroy){ me.store.destroyStore(); }else{ me.store.un("add", me.onStoreAdd, me); me.store.un("clear", me.onStoreClear, me); me.store.un("remove", me.onStoreRemove, me); me.store.un("update", me.onStoreUpdate, me); } } if(store){ store = Ext.data.StoreManager.lookup(store); store.on({ add: me.onStoreAdd, clear: me.onStoreClear, remove: me.onStoreRemove, update: me.onStoreUpdate, scope: me }); } me.store = store; if(store && !initial) { me.refresh(); } }, /** * Selects all records in the view. * @param {Boolean} suppressEvent True to suppress any select events */ selectAll: function(suppressEvent) { var me = this, selections = me.store.getRange(), i = 0, len = selections.length, start = me.getSelection().length; me.bulkChange = true; for (; i < len; i++) { me.doSelect(selections[i], true, suppressEvent); } delete me.bulkChange; // fire selection change only if the number of selections differs me.maybeFireSelectionChange(me.getSelection().length !== start); }, /** * Deselects all records in the view. * @param {Boolean} suppressEvent True to suppress any deselect events */ deselectAll: function(suppressEvent) { var me = this, selections = me.getSelection(), i = 0, len = selections.length, start = me.getSelection().length; me.bulkChange = true; for (; i < len; i++) { me.doDeselect(selections[i], suppressEvent); } delete me.bulkChange; // fire selection change only if the number of selections differs me.maybeFireSelectionChange(me.getSelection().length !== start); }, // Provides differentiation of logic between MULTI, SIMPLE and SINGLE // selection modes. Requires that an event be passed so that we can know // if user held ctrl or shift. selectWithEvent: function(record, e, keepExisting) { var me = this; switch (me.selectionMode) { case 'MULTI': if (e.ctrlKey && me.isSelected(record)) { me.doDeselect(record, false); } else if (e.shiftKey && me.lastFocused) { me.selectRange(me.lastFocused, record, e.ctrlKey); } else if (e.ctrlKey) { me.doSelect(record, true, false); } else if (me.isSelected(record) && !e.shiftKey && !e.ctrlKey && me.selected.getCount() > 1) { me.doSelect(record, keepExisting, false); } else { me.doSelect(record, false); } break; case 'SIMPLE': if (me.isSelected(record)) { me.doDeselect(record); } else { me.doSelect(record, true); } break; case 'SINGLE': // if allowDeselect is on and this record isSelected, deselect it if (me.allowDeselect && me.isSelected(record)) { me.doDeselect(record); // select the record and do NOT maintain existing selections } else { me.doSelect(record, false); } break; } }, /** * Selects a range of rows if the selection model {@link #isLocked is not locked}. * All rows in between startRow and endRow are also selected. * @param {Ext.data.Model/Number} startRow The record or index of the first row in the range * @param {Ext.data.Model/Number} endRow The record or index of the last row in the range * @param {Boolean} [keepExisting] True to retain existing selections */ selectRange : function(startRow, endRow, keepExisting, dir){ var me = this, store = me.store, selectedCount = 0, i, tmp, dontDeselect, records = []; if (me.isLocked()){ return; } if (!keepExisting) { me.deselectAll(true); } if (!Ext.isNumber(startRow)) { startRow = store.indexOf(startRow); } if (!Ext.isNumber(endRow)) { endRow = store.indexOf(endRow); } // swap values if (startRow > endRow){ tmp = endRow; endRow = startRow; startRow = tmp; } for (i = startRow; i <= endRow; i++) { if (me.isSelected(store.getAt(i))) { selectedCount++; } } if (!dir) { dontDeselect = -1; } else { dontDeselect = (dir == 'up') ? startRow : endRow; } for (i = startRow; i <= endRow; i++){ if (selectedCount == (endRow - startRow + 1)) { if (i != dontDeselect) { me.doDeselect(i, true); } } else { records.push(store.getAt(i)); } } me.doMultiSelect(records, true); }, /** * Selects a record instance by record instance or index. * @param {Ext.data.Model[]/Number} records An array of records or an index * @param {Boolean} [keepExisting] True to retain existing selections * @param {Boolean} [suppressEvent] Set to true to not fire a select event */ select: function(records, keepExisting, suppressEvent) { // Automatically selecting eg store.first() or store.last() will pass undefined, so that must just return; if (Ext.isDefined(records)) { this.doSelect(records, keepExisting, suppressEvent); } }, /** * Deselects a record instance by record instance or index. * @param {Ext.data.Model[]/Number} records An array of records or an index * @param {Boolean} [suppressEvent] Set to true to not fire a deselect event */ deselect: function(records, suppressEvent) { this.doDeselect(records, suppressEvent); }, doSelect: function(records, keepExisting, suppressEvent) { var me = this, record; if (me.locked) { return; } if (typeof records === "number") { records = [me.store.getAt(records)]; } if (me.selectionMode == "SINGLE" && records) { record = records.length ? records[0] : records; me.doSingleSelect(record, suppressEvent); } else { me.doMultiSelect(records, keepExisting, suppressEvent); } }, doMultiSelect: function(records, keepExisting, suppressEvent) { var me = this, selected = me.selected, change = false, i = 0, len, record; if (me.locked) { return; } records = !Ext.isArray(records) ? [records] : records; len = records.length; if (!keepExisting && selected.getCount() > 0) { if (me.doDeselect(me.getSelection(), suppressEvent) === false) { return; } // TODO - coalesce the selectionchange event in deselect w/the one below... } function commit () { selected.add(record); change = true; } for (; i < len; i++) { record = records[i]; if (keepExisting && me.isSelected(record)) { continue; } me.lastSelected = record; me.onSelectChange(record, true, suppressEvent, commit); } me.setLastFocused(record, suppressEvent); // fire selchange if there was a change and there is no suppressEvent flag me.maybeFireSelectionChange(change && !suppressEvent); }, // records can be an index, a record or an array of records doDeselect: function(records, suppressEvent) { var me = this, selected = me.selected, i = 0, len, record, attempted = 0, accepted = 0; if (me.locked) { return false; } if (typeof records === "number") { records = [me.store.getAt(records)]; } else if (!Ext.isArray(records)) { records = [records]; } function commit () { ++accepted; selected.remove(record); } len = records.length; for (; i < len; i++) { record = records[i]; if (me.isSelected(record)) { if (me.lastSelected == record) { me.lastSelected = selected.last(); } ++attempted; me.onSelectChange(record, false, suppressEvent, commit); } } // fire selchange if there was a change and there is no suppressEvent flag me.maybeFireSelectionChange(accepted > 0 && !suppressEvent); return accepted === attempted; }, doSingleSelect: function(record, suppressEvent) { var me = this, changed = false, selected = me.selected; if (me.locked) { return; } // already selected. // should we also check beforeselect? if (me.isSelected(record)) { return; } function commit () { me.bulkChange = true; if (selected.getCount() > 0 && me.doDeselect(me.lastSelected, suppressEvent) === false) { delete me.bulkChange; return false; } delete me.bulkChange; selected.add(record); me.lastSelected = record; changed = true; } me.onSelectChange(record, true, suppressEvent, commit); if (changed) { if (!suppressEvent) { me.setLastFocused(record); } me.maybeFireSelectionChange(!suppressEvent); } }, /** * Sets a record as the last focused record. This does NOT mean * that the record has been selected. * @param {Ext.data.Model} record */ setLastFocused: function(record, supressFocus) { var me = this, recordBeforeLast = me.lastFocused; me.lastFocused = record; me.onLastFocusChanged(recordBeforeLast, record, supressFocus); }, /** * Determines if this record is currently focused. * @param {Ext.data.Model} record */ isFocused: function(record) { return record === this.getLastFocused(); }, // fire selection change as long as true is not passed // into maybeFireSelectionChange maybeFireSelectionChange: function(fireEvent) { var me = this; if (fireEvent && !me.bulkChange) { me.fireEvent('selectionchange', me, me.getSelection()); } }, /** * Returns the last selected record. */ getLastSelected: function() { return this.lastSelected; }, getLastFocused: function() { return this.lastFocused; }, /** * Returns an array of the currently selected records. * @return {Ext.data.Model[]} The selected records */ getSelection: function() { return this.selected.getRange(); }, /** * Returns the current selectionMode. * @return {String} The selectionMode: 'SINGLE', 'MULTI' or 'SIMPLE'. */ getSelectionMode: function() { return this.selectionMode; }, /** * Sets the current selectionMode. * @param {String} selModel 'SINGLE', 'MULTI' or 'SIMPLE'. */ setSelectionMode: function(selMode) { selMode = selMode ? selMode.toUpperCase() : 'SINGLE'; // set to mode specified unless it doesnt exist, in that case // use single. this.selectionMode = this.modes[selMode] ? selMode : 'SINGLE'; }, /** * Returns true if the selections are locked. * @return {Boolean} */ isLocked: function() { return this.locked; }, /** * Locks the current selection and disables any changes from happening to the selection. * @param {Boolean} locked True to lock, false to unlock. */ setLocked: function(locked) { this.locked = !!locked; }, /** * Returns true if the specified row is selected. * @param {Ext.data.Model/Number} record The record or index of the record to check * @return {Boolean} */ isSelected: function(record) { record = Ext.isNumber(record) ? this.store.getAt(record) : record; return this.selected.indexOf(record) !== -1; }, /** * Returns true if there are any a selected records. * @return {Boolean} */ hasSelection: function() { return this.selected.getCount() > 0; }, refresh: function() { var me = this, toBeSelected = [], oldSelections = me.getSelection(), len = oldSelections.length, selection, change, i = 0, lastFocused = this.getLastFocused(); // check to make sure that there are no records // missing after the refresh was triggered, prune // them from what is to be selected if so for (; i < len; i++) { selection = oldSelections[i]; if (!this.pruneRemoved || me.store.indexOf(selection) !== -1) { toBeSelected.push(selection); } } // there was a change from the old selected and // the new selection if (me.selected.getCount() != toBeSelected.length) { change = true; } me.clearSelections(); if (me.store.indexOf(lastFocused) !== -1) { // restore the last focus but supress restoring focus this.setLastFocused(lastFocused, true); } if (toBeSelected.length) { // perform the selection again me.doSelect(toBeSelected, false, true); } me.maybeFireSelectionChange(change); }, /** * A fast reset of the selections without firing events, updating the ui, etc. * For private usage only. * @private */ clearSelections: function() { // reset the entire selection to nothing this.selected.clear(); this.lastSelected = null; this.setLastFocused(null); }, // when a record is added to a store onStoreAdd: function() { }, // when a store is cleared remove all selections // (if there were any) onStoreClear: function() { if (this.selected.getCount > 0) { this.clearSelections(); this.maybeFireSelectionChange(true); } }, // prune records from the SelectionModel if // they were selected at the time they were // removed. onStoreRemove: function(store, record) { var me = this, selected = me.selected; if (me.locked || !me.pruneRemoved) { return; } if (selected.remove(record)) { if (me.lastSelected == record) { me.lastSelected = null; } if (me.getLastFocused() == record) { me.setLastFocused(null); } me.maybeFireSelectionChange(true); } }, /** * Returns the count of selected records. * @return {Number} The number of selected records */ getCount: function() { return this.selected.getCount(); }, // cleanup. destroy: function() { }, // if records are updated onStoreUpdate: function() { }, // @abstract onSelectChange: function(record, isSelected, suppressEvent) { }, // @abstract onLastFocusChanged: function(oldFocused, newFocused) { }, // @abstract onEditorKey: function(field, e) { }, // @abstract bindComponent: function(cmp) { } });


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Job in Error State moved before qdel was called
A failed job was moved back from the cluster before qdel was called or a resubmit was attempted.
Details
| Id: | 05a8f2bb1c825244dcb42cd02ab8221a48938530 |
| Type: | bugfix |
| Creation time: | 2010-11-16 14:17 |
| Creator: | Mathew Topper<EMAIL_ADDRESS>|
| Release: | 0.2 (released 2011-02-09) |
| Component: | sshsge.py |
| Status: | closed : fixed |
| In progress: | 2 weeks |
Issue log
| 2011-02-09 11:44 | Mathew Topper<EMAIL_ADDRESS>| |
| Have completed a sucessful test so I assume it is working ok with the new system now. | ||
| 2011-02-08 16:17 | Mathew Topper<EMAIL_ADDRESS>| |
| Had an issue with hitting the recursion limit when waiting for the job to start so have turned check_status into an infinite while loop with exits. There is still some recursion with jobs restarting but not infinite any more. Unfortunately the grid engine is balls, so I can't test how the code is handling completed jobs. | ||
| 2011-02-07 15:40 | Mathew Topper<EMAIL_ADDRESS>| |
| Have changed the control system now to look for actual output from qsub anf qacct rather than just a non responce from qsub. As long as the job was not deleted then qacct should record statistics for jobs that have left the queue. If qstat is not giving an answer and qacct is also not giving an answer then something has gone wrong and the job should be resubmitted. I've put some controls of the number of times a job should resubmit in this case, so it doesn't just keep flogging a dead horse. | ||
| 2011-01-31 16:19 | Mathew Topper<EMAIL_ADDRESS>| |
| OK, so the issue here is uncontrolled restarting of the queue which will cause all sorts of problems (i.e. completely lose the job). I think the best way around this is to keep trying to start a job until files are generated. I don't know how this effects the restarting process. | ||
| 2010-11-24 09:38 | Mathew Topper<EMAIL_ADDRESS>| |
| Just waiting for the issue to reoccur and hope that the logging picks it up! | ||
| 2010-11-24 09:37 | Mathew Topper<EMAIL_ADDRESS>| |
| Problem reoccurred of a job ending up in the error state but not being deleted and possibly resubmitted before being returned. Bringing this one back to life. | ||
| 2010-11-23 12:08 | Mathew Topper<EMAIL_ADDRESS>| |
| In the last run a job went into error state and was resubmitted successfully so I'm going to close this one. | ||
| 2010-11-23 10:43 | Mathew Topper<EMAIL_ADDRESS>| |
| I think the adjustments to sshsge.py have sorted it out, but as I can't force a job into the error state, I am going to stop this issue until another example can be found. One concern is that it may not report what has happened unless a better logging system is implemented. | ||
| 2010-11-16 15:38 | Mathew Topper<EMAIL_ADDRESS>| |
| Ok, so the problem is in SSHSGE.wait. There was the interval in between the check for the Eqw state and the /dev/null test. I'm not sure what that test looks like for an Eqw type job. I can't seem to make a job to go into this state, which is annoying so I've issued a command to check the reason for the issue if it does happen. | ||
| 2010-11-16 14:19 | Mathew Topper<EMAIL_ADDRESS>| |
| I was wondering how to test for this, but I guess a script with an error state would be one way, although I don't know if it would create the behaviour seen by the job failing. | ||
| 2010-11-16 14:18 | Mathew Topper<EMAIL_ADDRESS>| |
| 2010-11-16 14:17 | Mathew Topper<EMAIL_ADDRESS>| |


Python¶
Python is a free and open-source computer programming language. It’s one of the most popular in the world and praised by its supporters as clear and easy to read.
That makes it ideal for beginners and is partly why it’s been adopted by professionals in many fields, ranging from engineering and web development to journalism and music.
You can check if Python is already installed on your computer by visiting your command line and entering the following:
python --version
You should see something like this after you hit enter:
Python 2.7.13
If not, you’ll need to install Python on your system.
Windows¶
Here’s how to do so on Windows:
- Verify Python is not already installed with the command above.
- Download the Python 2.7 installer from python.org <http://python.org>.
- Run the installer, and make sure to check the “Add python.exe to Path” setting is checked.
- Verify that Python has been installed.
Mac OSX¶
If you’re using Mac OSX, it’s more likely that Python is already installed. Here’s how to find out what version you have.
You’ll start going to your terminal.
- Go to your Terminal.
- Type the
python --version
command described at the top of the page.


#include <index_manager.h>
Data Fields | |
| Byte2_t | Lsiz |
| length of marker segment excluding the marker | |
| Byte2_t | Rsiz |
| capabilities that a decoder needs | |
| Byte4_t | Xsiz |
| width of the reference grid | |
| Byte4_t | Ysiz |
| height of the reference grid | |
| Byte4_t | XOsiz |
| horizontal offset from the origin of the reference grid to the left side of the image area | |
| Byte4_t | YOsiz |
| vertical offset from the origin of the reference grid to the top side of the image area | |
| Byte4_t | XTsiz |
| width of one reference tile with respect to the reference grid | |
| Byte4_t | YTsiz |
| height of one reference tile with respect to the reference grid | |
| Byte4_t | XTOsiz |
| horizontal offset from the origin of the reference grid to the left side of the first tile | |
| Byte4_t | YTOsiz |
| vertical offset from the origin of the reference grid to the top side of the first tile | |
| Byte4_t | XTnum |
| number of tiles in horizontal direction | |
| Byte4_t | YTnum |
| number of tiles in vertical direction | |
| Byte2_t | Csiz |
| number of the components in the image | |
| Byte_t | Ssiz [3] |
| precision (depth) in bits and sign of the component samples | |
| Byte_t | XRsiz [3] |
| horizontal separation of a sample of component with respect to the reference grid | |
| Byte_t | YRsiz [3] |
| vertical separation of a sample of component with respect to the reference grid |
|
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number of the components in the image
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length of marker segment excluding the marker
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capabilities that a decoder needs
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precision (depth) in bits and sign of the component samples
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horizontal offset from the origin of the reference grid to the left side of the image area
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horizontal separation of a sample of component with respect to the reference grid
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|
width of the reference grid
|
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|
number of tiles in horizontal direction
|
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|
horizontal offset from the origin of the reference grid to the left side of the first tile
|
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|
width of one reference tile with respect to the reference grid
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vertical offset from the origin of the reference grid to the top side of the image area
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vertical separation of a sample of component with respect to the reference grid
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height of the reference grid
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number of tiles in vertical direction
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vertical offset from the origin of the reference grid to the top side of the first tile
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height of one reference tile with respect to the reference grid
|


He guys,
I received my fresh bought nanodeRF last week and yesterday I decide to build it. So I prepared my desk, bought nice 0.5mm soldering tin and build it in about 2 hours with the excelent step-by-step buildguide without any problem.
I did some testing with my multimeter and get nice clean readings back. 3.30v and 5.1v at all the places. So I put on the IC's and hook it up to the FTDI cable. But now the pain begins..
I suspected an blink from the red LED onboard..but it didn't.. So I started the IDE suite and tried to upload an simple test sketch. But I'm receiving an connection error like this(click on thumbnail):
So thats not good.
So I disconnected the nanodeRF and started some more testing with my multimeter.
- At the Atmel 328 I found an nice 3.30v on the input vcc side (pin7) and also at the REF pins (20&22) an nice 3.30v
- At the RM12B chip also good 3.30v Readings (messured on the IC pins)
- The ethernetchip ENC28J60 gives also an 3.30 reading at pin 7
- When I connect an LAN cable..the leds on the magjack also light-up..geen and some blinking of the yellow signal led..
- I double checked that the extra 10uF cap is on the right pins 2&6
- I checked all the resistors with my multimeter and color-codings from the buildguide.
- I received 6x 10K resistor and not 7 so I put one from my own into the board near the reset switch)
I did also made an test on the leds voltage. there it's not 2V but only 0.88v! with the negative pin on pin 13 of the 74HCT125 IC so thats why the don't light up.. So I checked the 270R resistors..and the where fine.. and when I measured the voltage from the FTDI ground pin with those resistors.. and it's 3.30v. The 74HCT125 also gets an normal 3.30v at pin 2 and 7.. But it don't get an signal from the atmel chip? can I measure that somehow without an scope?
Can somebody help me with debugging this thing? I'm "new" to arduino but I know the basics of electronics and measurements.. I put an album with more detail photo's online at:
http://img62.imageshack.us/slideshow/webplayer.php?id=nanodesolderingdon...
http://imageshack.us/g/62/nanodesolderingdone.jpg/
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Imageshack does not work for me - I cannot read the error messages. Can you copy and paste the messages as text into your post, or attach a good screenshot (.png ?) to your post.
(Click "File attachments" and when you have uploaded the picture, remember to click "List" to make the attachment visible ).
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
It's a default error no sync: (get it on win7 arduino IDE and also on ubuntu IDE), set the board to an arduino ONE and confirmed the right COM port at windows.
and I also attached 2 fotos of the board.
To get it clear, i don't get any "alive" signal from the Atmel mega328. and the led's are off (except those on the ethernet magjack) but al the voltage readings are OK..
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Do you have a 5 V FTDI adapter? (The 3.3 V version does not work).
It is possible that you do not have a bootloader. Glyn Hudson says that all those bought from the OpenEnergyMonitor shop have a bootloader loaded and tested, but no test sketch is loaded. I had the same problem. I cannot remember the details now, however I loaded the bootloader and then I could load a test sketch.
There are more possible causes here: http://www.ladyada.net/learn/arduino/help.html
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
mmmm no default sketch loaded, so I can't aspect an blinking green or red led by default . I decided to buy an new FTDI adapter (The one that I own is a 2 euro FTDI converter from china,ebay and I don't own an other arduino so I can't check if it's faulty or not..) from the jeelabs shop its one with the FT232R chip on it, that's the identical chip as on an arduino UNO.
I hope to receive it in a couple of days. (jeelabs is also a Dutch company so....) and will test my NanodeRF with that again.
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Have you tried to load the bootloader? The one loaded by the shop is the Arduino Optiboot bootloader..
Have you looked in the Arduino IDE Help => Troubleshooting?
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Finaly after a lot of google-ing and testing I found the solution, it's stupid but the ebay "made in china" FTDI adapter with the CP2102 chipset. (thats the same chipset as on the nanodeshop FTDI adapter) has an wrong PCB label on it!
The RXD header is the TXD and likewise the TXD is the RXD on the adapter. very very frustrating! found the solution thanks so this guys weblog: http://whatididwas.blogspot.nl/2011/12/cp2102-usb-to-rs232-for-arduino-c...
So I run my first sketch test to blink the 2 leds and YES it works fine!
next step: test my sensingshield onto the nanodeRF with an CT sensor.
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Excellent detective work there. I don't think I would ever have found that via this thread.
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
I've made some pictures from the faulty adapter and a simple drawing:
So you have to make an extra header pin on the J3 DTR hole for getting a working RESET pin. Because the RST pin isn't resetting your arduino but it's resetting the CP2102 USB chip!.
and the RXD pin is not RXD but TXD and visa versa.
Re: NanodeRF not responding after build (soldering) job. (SOLVED = faulty ebay USB UART adapter)
Thank you for posting that. I think the moral of the tale is - buy from here http://shop.openenergymonitor.com/programmer-usb-to-uart/


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LOCK
Section: SQL Commands (7)Updated: 2012-08-14
Index Return to Main Contents
NAME
LOCK - lock a tableSYNOPSIS
LOCK [ TABLE ] [ ONLY ] name [, ...] [ IN lockmode MODE ] [ NOWAIT ] where lockmode is one of: ACCESS SHARE | ROW SHARE | ROW EXCLUSIVE | SHARE UPDATE EXCLUSIVE | SHARE | SHARE ROW EXCLUSIVE | EXCLUSIVE | ACCESS EXCLUSIVE
DESCRIPTION
LOCK TABLE obtains a table-level lock, waiting if necessary for any conflicting locks to be released. If NOWAIT is specified, LOCK TABLE does not wait to acquire the desired lock: if it cannot be acquired immediately, the command is aborted and an error is emitted. Once obtained, the lock is held for the remainder of the current transaction. (There is no UNLOCK TABLE command; locks are always released at transaction end.)
When acquiring locks automatically for commands that reference tables, PostgreSQL always uses the least restrictive lock mode possible. LOCK TABLE provides for cases when you might need more restrictive locking. For example, suppose an application runs a transaction at the Read Committed isolation level and needs to ensure that data in a table remains stable for the duration of the transaction. To achieve this you could obtain SHARE lock mode over the table before querying. This will prevent concurrent data changes and ensure subsequent reads of the table see a stable view of committed data, because SHARE lock mode conflicts with the ROW EXCLUSIVE lock acquired by writers, and your LOCK TABLE name IN SHARE MODE statement will wait until any concurrent holders of ROW EXCLUSIVE mode locks commit or roll back. Thus, once you obtain the lock, there are no uncommitted writes outstanding; furthermore none can begin until you release the lock.
To achieve a similar effect when running a transaction at the Serializable isolation level, you have to execute the LOCK TABLE statement before executing any SELECT or data modification statement. A serializable transaction's view of data will be frozen when its first SELECT or data modification statement begins. A LOCK TABLE later in the transaction will still prevent concurrent writes --- but it won't ensure that what the transaction reads corresponds to the latest committed values.
If a transaction of this sort is going to change the data in the table, then it should use SHARE ROW EXCLUSIVE lock mode instead of SHARE mode. This ensures that only one transaction of this type runs at a time. Without this, a deadlock is possible: two transactions might both acquire SHARE mode, and then be unable to also acquire ROW EXCLUSIVE mode to actually perform their updates. (Note that a transaction's own locks never conflict, so a transaction can acquire ROW EXCLUSIVE mode when it holds SHARE mode --- but not if anyone else holds SHARE mode.) To avoid deadlocks, make sure all transactions acquire locks on the same objects in the same order, and if multiple lock modes are involved for a single object, then transactions should always acquire the most restrictive mode first.
More information about the lock modes and locking strategies can be found in in the documentation.
PARAMETERS
- name
-
The name (optionally schema-qualified) of an existing table to
lock. If ONLY is specified, only that table is
locked. If ONLY is not specified, the table and all
its descendant tables (if any) are locked.
The command LOCK TABLE a, b; is equivalent to LOCK TABLE a; LOCK TABLE b;. The tables are locked one-by-one in the order specified in the LOCK TABLE command.
- lockmode
-
The lock mode specifies which locks this lock conflicts with.
Lock modes are described in in the documentation.
If no lock mode is specified, then ACCESS EXCLUSIVE, the most restrictive mode, is used.
- NOWAIT
- Specifies that LOCK TABLE should not wait for any conflicting locks to be released: if the specified lock(s) cannot be acquired immediately without waiting, the transaction is aborted.
NOTES
LOCK TABLE ... IN ACCESS SHARE MODE requires SELECT privileges on the target table. All other forms of LOCK require at least one of UPDATE, DELETE, or TRUNCATE privileges.
LOCK TABLE is useless outside a transaction block: the lock would remain held only to the completion of the statement. Therefore PostgreSQL reports an error if LOCK is used outside a transaction block. Use BEGIN [begin(7)] and COMMIT [commit(7)] (or ROLLBACK [rollback(7)]) to define a transaction block.
LOCK TABLE only deals with table-level locks, and so the mode names involving ROW are all misnomers. These mode names should generally be read as indicating the intention of the user to acquire row-level locks within the locked table. Also, ROW EXCLUSIVE mode is a sharable table lock. Keep in mind that all the lock modes have identical semantics so far as LOCK TABLE is concerned, differing only in the rules about which modes conflict with which. For information on how to acquire an actual row-level lock, see in the documentation and the FOR UPDATE/FOR SHARE Clause [select(7)] in the SELECT reference documentation.
EXAMPLES
Obtain a SHARE lock on a primary key table when going to perform inserts into a foreign key table:
BEGIN WORK; LOCK TABLE films IN SHARE MODE; SELECT id FROM films WHERE name = 'Star Wars: Episode I - The Phantom Menace'; -- Do ROLLBACK if record was not returned INSERT INTO films_user_comments VALUES (_id_, 'GREAT! I was waiting for it for so long!'); COMMIT WORK;
Take a SHARE ROW EXCLUSIVE lock on a primary key table when going to perform a delete operation:
BEGIN WORK; LOCK TABLE films IN SHARE ROW EXCLUSIVE MODE; DELETE FROM films_user_comments WHERE id IN (SELECT id FROM films WHERE rating < 5); DELETE FROM films WHERE rating < 5; COMMIT WORK;
COMPATIBILITY
There is no LOCK TABLE in the SQL standard, which instead uses SET TRANSACTION to specify concurrency levels on transactions. PostgreSQL supports that too; see SET TRANSACTION [set_transaction(7)] for details.
Except for ACCESS SHARE, ACCESS EXCLUSIVE, and SHARE UPDATE EXCLUSIVE lock modes, the PostgreSQL lock modes and the LOCK TABLE syntax are compatible with those present in Oracle.
Index
This document was created by man2html, using the manual pages.
Time: 05:34:15 GMT, December 24, 2015


US aircraft carrier strike group sails through Strait of Hormuz
by ReutersThe US aircraft carrier strike group Abraham Lincoln sailed through the vital Strait of Hormuz on Tuesday, US officials told Reuters, amid simmering tensions between Iran and the United States. Related Stories
Tensions in the Gulf have risen since attacks on oil tankers this summer, including off the UAE coast, and a major assault on energy facilities in Saudi Arabia.
Washington has blamed Iran, which has denied being behind the attacks on global energy infrastructure.
The commander overseeing US naval forces in the Middle East told Reuters in May that he would send an aircraft carrier through the Strait of Hormuz if needed.
In a statement on Tuesday, the Navy said the Lincoln transited through the Strait into the Gulf.
About a fifth of the world's oil passes through the Strait of Hormuz.
The United States has deployed thousands of additional military forces in the Middle East, including bombers and air defence personnel, to act as a deterrent against what Washington says is provocative Iranian behaviour.


24/08/2018
Setor Sudoeste
Animais
Meio ambiente
He was charismatic, magnetic, electric and everybody knew it.
When he walked in every woman's head turned, everyone stood up to talk to him.
He was like this hybrid, this mix of a man who couldn't contain himself.


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How to use the Feathers SpinnerList
component
The SpinnerList
class extends the List
component to allow the user to change the selected item by scrolling. Typically, the selected item is positioned in the center of the list, and it may be visually highlighted in some way. A SpinnerList
will often loop infinitely, repeating its items as the user scrolls.
The Basics
First, let's create a SpinnerList
control and add it to the display list:
var list:SpinnerList = new SpinnerList();
this.addChild( list );
Similar to a List
, we can pass an IListCollection
implementation, such as ArrayCollection
or VectorCollection
, to the dataProvider
property:
list.dataProvider = new ArrayCollection(
[
{ text: "Milk", thumbnail: textureAtlas.getTexture( "milk" ) },
{ text: "Eggs", thumbnail: textureAtlas.getTexture( "eggs" ) },
{ text: "Bread", thumbnail: textureAtlas.getTexture( "bread" ) },
{ text: "Chicken", thumbnail: textureAtlas.getTexture( "chicken" ) },
]);
We'll set up the label and icon in the item renderer the same way too:
list.itemRendererFactory = function():IListItemRenderer
{
var itemRenderer:DefaultListItemRenderer = new DefaultListItemRenderer();
itemRenderer.labelField = "text";
itemRenderer.iconSourceField = "thumbnail";
return itemRenderer;
};
We can listen for selection changes with Event.CHANGE
:
list.addEventListener( Event.CHANGE, list_changeHandler );
Likewise, we can use the selectedIndex
and selectedItem
properties:
list.selectedIndex = 3;
trace( list.selectedItem.text ); //Chicken
One way that SpinnerList
behaves differently is that selection may not be disabled. A regular List
may be used to display read-only content without selection, but the purpose of SpinnerList
is to select an item. If you attempt to set the isSelectable
property to false
, a runtime error will be thrown.
Skinning a SpinnerList
A spinner list provides a number of properties to customize its appearance. For full details about what skin and style properties are available, see the SpinnerList
API reference. We'll look at a few of the most common properties below.
Highlight the selected item
We can add a display object above the selected item to visually highlight it. For instance, we might display a border with a transparency in the center that reveals the selected item. In the following example, we pass in a starling.display.Image
to the selectionOverlaySkin
property, but the skin may be any Starling display object:
list.selectionOverlaySkin = new Image( texture );
This skin will be displayed in the center of the list, positioned either horizontally or vertically, depending on which way the list may be scrolled.


Pembina Pipeline deal with Kinder Morgan cleared by Competition Bureau
CALGARY — Pembina Pipeline Corp. says the Canadian Competition Bureau has signed off on its $4.3-billion deal to buy assets from Kinder Morgan Inc.
by Canadian PressCALGARY — Pembina Pipeline Corp. says the Canadian Competition Bureau has signed off on its $4.3-billion deal to buy assets from Kinder Morgan Inc.
The Calgary-based company says the receipt of the "no-action letter" from the bureau clears the final regulatory hurdle for the deal to go through.
Pembina announced in August that it would buy Kinder Morgan Canada Ltd. and the U.S. portion of the Cochin pipeline system.
Along with the 110,000-barrel-a-day Cochin pipeline, which runs from Fort Saskatchewan, Alta. to Chicago, the deal also includes an Edmonton storage and terminal business and Vancouver Wharves, a bulk storage and export-import business.
Kinder Morgan Canada was spun off from its American parent in mid-2017 to raise money to build the Trans Mountain pipeline expansion but it sold the pipeline and its expansion project to the federal government for $4.5 billion last summer.
Pembina, which is offering shares worth $2.3 billion along with $2.05 billion in cash for the assets, expects the deal to close in December after a vote by shareholders.
This report by The Canadian Press was first published Nov. 20, 2019.
Companies in this story: (TSX:PPL, TSX:KML)
The Canadian Press


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Ederson back in Manchester City side for Chelsea clash
by BeSoccerManchester City lost away to Liverpool without injured goalkeeper Ederson, but he is back for Saturday's home game against Chelsea.
Ederson is back in the Manchester City side to face Chelsea in the Premier League on Saturday.
The goalkeeper missed City's last game, a 3-1 defeat at Liverpool that left the champions nine points behind Jurgen Klopp's Reds in the Premier League table.
Ederson was withdrawn during a Champions League draw with Atalanta this month due to a thigh injury, with Kyle Walker ending the game in goal after Claudio Bravo was sent off.
The Brazil international has, as expected, been passed fit for a crunch clash with Chelsea, with Frank Lampard's side having won six straight Premier League games to move up to third in the league, above City.
Bernardo Silva is out after being banned for one game for his controversial tweet about team-mate Benjamin Mendy, while Raheem Sterling starts after being dropped for England's 7-0 win over Montenegro during the international break following an incident with Liverpool defender Joe Gomez.
David Silva also returns to midfield, having been an unused substitute against Liverpool, while Riyad Mahrez starts alongside Sterling and Sergio Aguero.
Featured links
- The latest football transfers news and rumours
- Luis Enrique returns to Spain national team
- Mourinho replaces Pochettino at Tottenham
- Wales, golf, Madrid... in that order
Joao Cancelo, John Stones, Fernandinho and Mendy line up in defence.
Chelsea make two changes from a victory over Crystal Palace as they aim to win eight consecutive away games in all competitions for the first time in their history.
Jorginho replaces Mason Mount in midfield and Cesar Azpilicueta comes in for Reece James at full-back.


Anyone who ever read John Campbell's "Astounding" or "Analog" magazines, or admired a painting by Frank Kelly Freas will recognize what has been accomplished in the film version of "Battlefield Earth." This is real science fiction on an epic scale. The heroes have to use their brains. The villains take too much for granted.
Some of the reviews I've seen appearing are by critics who take too much for granted. It is painfully obvious when a reviewer hasn't bothered to see the film he lambastes. One reviewer was babbling about robots and puppets. What movie is that, hmmm?
Look, H.G. Wells was a Socialist. But you don't have to be a Socialist to enjoy "The War of the Worlds"! C.S. Lewis was a Christian. But you don't have to be a Christian to enjoy the Narnia books!
The point should be obvious. L. Ron Hubbard was a great science fiction writer. "Battlefield Earth" is one of his best stories. Roger Christian has made a fine film and if there are any hidden messages, it is that kids should read books.
John Travolta plays the most sarcastic villain in the history of motion pictures. That alone would justify seeing the film but there is much more. Barry Pepper, Kim Coates, Christian Tessier and the rest of the freedom fighters make you believe that the human race will never be defeated. On the other side, Forest Whitaker provides a superb foil for Travolta's character. Between the two of them we experience the Satanic side of bureaucracy.
When I saw this film at its Hollywood premiere, I paid close attention to the kids in the audience. They don't have any agendas. They just want to have a good time. They could tell the good guys from the bad guys. They loved the action and explosions and here's the most important part: they didn't run to the concession stand during the dialog scenes.
I'd like to see someone try and convince them that they didn't really enjoy the movie.
Brad Linaweaver
Sent via Deja.com http://www.deja.com/ Before you buy.
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Related links: index of all rec.arts.movies.reviews reviews


--- layout: post esbma_id: 1768 title: Time and Space Tradeoffs in Version Control Storage date: 2009-04-28 13:00:00 ---
Storage is one of the most difficult challenges for a version control system. For every file, we must store every version that has ever existed. The logical size of a version control repository never shrinks. It just keeps growing and growing, and every old version needs to remain available.
So, what is the best way to store every version of everything?
As we look for the right scheme, let's remember three things we consider to be important:
In this blog entry I will report the results of some exploration I've been doing. I am experimenting with different ways of storing the full history of one source code file. In this case, the file comes from the source code for SourceGear Vault. It has been regularly edited for almost seven years. There are 508 versions of this file.
As I describe the various things I have tried, a running theme will be the classic tradeoff of space vs. speed. In physics, we know that matter and energy are interchangeable. In computer science, we know that time and space are interchangeable. Usually, we can find a way to make things faster by using more space, or make things smaller by taking more time.
As I said, I'll be storing 508 versions of the same file. It's a C# source code file. For each attempt, I will report two things:
Before we get started, a few caveats:
OK, how should we store these 508 versions of the file?
As a first attempt, let's just store them. No compression or funky encoding. Each of the 508 versions will be stored in full and uncompressed form.
This is the starting point, even if it is not very practical.
Size: 112,643 KB
Time: 2.5 s
#ifdef DIGRESSION
Yes, dear reader, I admit that this file is far too long.
You can do the math. If the archive takes 112 MB and there are 508 versions, then each one is 230 KB. That's pretty big for a source code file.
Actually, it's worse than you think. The 230 KB figure is just the average. The first version of the file is around 90 KB. The latest version is over 400 KB.
In our defense, I'd like to point out that this piece of code needs to stay compatible with .NET 1.1, so the entire class must be in a single file. However, I'd still have to answer to the charge of "First Degree Failure to Refactor". Fine. I'll have my attorney contact you to plead out on a lesser charge. I'm thinking maybe "Third Degree Contributing to the Delinquency of an Intern", or something like that.
#endif
This "full and uncompressed" format uses an awful lot of space, but it is also the fastest. We will find ways of making this smaller, but all of those ways will be slower.
The relevant questions are:
Some solutions will allow us to make this a lot smaller and only a little slower. Those are interesting. Other possibilities will be only a little smaller but a lot slower. Those are not so interesting.
OK, for our next idea, let's just compress every version with zlib.
Size: 22,516 KB
Time: 4.0 sec
The results of this idea are surprisingly impressive. The archive is over 80% smaller, and only about 60% slower. That's darn good, considering that I didn't have to be terribly clever.
This tradeoff is probably worth it. In fact, it establishes a new baseline that might be tough to beat.
How do we get better than this?
Instead of just compressing every file independently, we could store things as deltas. Think of a delta as simply the difference between one version and the next.
Compression with zlib takes one standalone thing and makes an equivalent standalone thing which is smaller.
In contrast, a delta is a representation of the differences between two files. Suppose that somebody takes file X and makes a few changes to it, resulting in file Y. With a delta algorithm, we could calculate the delta between X and Y, and call it D. Then, instead of storing Y, we can store D.
The nice thing here is that D will be approximately the size of the edits, regardless of the size of the two files. If X was a 100 MB file and Y was the same file with an extra 50 bytes appended to the end, then D will be somewhere around 50 bytes,
A delta is a concept which might be implemented in a lot of different ways. In my case, the delta algorithm I am using is VCDIFF, which is described in RFC 3284. We have our own implementation of VCDIFF. Other implementations include xdelta and open-vcdiff.
The important thing to remember about deltas for storage is that you must have the reference item. D is a representation of Y, but only if you have X handy. X is the reference.
OK, it should be obvious that this concept can be helpful in storing a repository, but how do we set things up?
As a first attempt, let's store all 508 versions as a big chain of deltas. Every version is stored as a delta against the version just before it. Version 1 is the reference, and is the only version that is not stored as a delta.
Size: 7,682 KB
Time: Way too long to wait
Wow -- this is really small. It's over 93% smaller than the full/uncompressed form. It'll be hard to find a general purpose approach that is smaller than this.
But good grief this is slow. Fetching version 508 takes an eternity, because first you have to construct a temporary version of 507. And to construct version 507, you first have to construct a temporary version of 506. And so on.
Let's try something else. The problem with the chaining case above is that retrieving version 508 requires us to go all the way back to version 1, which is incredibly inefficient. Instead, let's insert "key frames" every 10 versions. We borrow this idea from the video world where compressed video streams store every frame as a delta, but every 10 seconds they insert a full, uncompressed frame of video.
By using key frames with chaining deltas, we can cut the time required to fetch the average version of the file. For example, with a key frame every 10 versions, we get most of the benefits of chaining, but in the worst case, we only need 9 delta operations to retrieve any version.
Size: 18,024 KB
Time: 41.0 sec
This is better, but still not very good. The compression here isn't much better than zlib, and the perf is still a lot worse. Compared to zlib, we don't want to pay a 10x speed penalty just to get 20% better compression.
All the key frames are stored as full and uncompressed files, and they're taking up a lot of space. Maybe we should zlib those key frames?
Size: 9,092 KB
Time: 42.7 sec
Now at least the compression is starting to look interesting. This is less than half the size of the zlib case, and 91.9% smaller than the full form, which is a level of compression that is probably worth the trouble. But the overall perf is still quite slow. In fact, it's even slower here than plain chaining with key frames, because we have to un-zlib the key frame.
The big problem here is that chains of deltas are killing our performance. Chained deltas can be used to make things very small because each delta matches up nicely with one set of user edits. But chained deltas are slow because we need multiple operations to retrieve a given file.
Another approach would be to use each reference for more than one delta. I call this the flower approach. With a flower, we deltify a line of versions by picking one version (say, the first one) and using it as the reference to make all the others into deltas.
Flower deltas should be much faster, since any file can be reconstructed with just one undeltify operation.
So let's try to flower all 508 versions using version 1 as the reference for all of them.
Size: 35,851 KB
Time: 10.9 sec
As expected, the performance here is much better.
But the overall space savings is lousy. Only version 2 was based directly on version 1. Every version after that has less and less in common with version 1, so the delta algorithm can't draw as much stuff from the reference.
This particular approach isn't going to win. Plain zlib is both smaller and faster.
Maybe we should try the flower concept with key frames?
Like before, every 10 frames go together as a group. But instead of chaining, we're going to run each group as a flower. The first version in the group will serve as the reference for the other 9. We can reasonably assume that the deltification of frame 10 won't be as good as frame 2, but hopefully 10 and 1 still have enough in common to be worthwhile.
Size: 18,648 KB
Time: 12.2 sec
Wow. This looks a lot better than chaining. The space used is about 17% smaller than zlib, but instead of being 10 times slower, it's only 3 times slower.
Of course, we can use the same trick we tried before. Let's zlib all those key frames.
 It's less than half the size of zlib. The perf still a lot slower than zlib, but at only about 3X slower, the tradeoff is the best we've seen so far.
OK. So we've made a lot of progress on saving space, but 3X slower than zlib still seems like a high price to pay. Do we really want to make that trade? Do we have to?
Let's look at the patterns for how this data is going to be accessed.
I've been reporting the total time required to fetch all 508 versions of the file. However, this benchmark doesn't reflect real usage very well at all. In practice, the recent stuff gets retrieved a LOT more often than the older stuff. Most of the time, developers are updating their working copy to whatever is latest.
As a rough guess, I'm going to say that version 508 gets retrieved twice as often as 507, which gets retrieved twice as often as 506, and so on. A timing test based on that assumption gives us results something like this:
Full 1.1 sec
Zlib 1.7 sec
One big flower 4.0 sec
Flower with key frames 5.1 sec
Chain with key frames 24.5 sec
Not too surprising.
In the spirit of optimizing performance for the most common operations, why not keep all the more recent versions in a faster form? We could still use something more aggressive for the older stuff, but we can probably get a nice performance boost if we just refuse to use deltification for the most recent 10 versions of the file.
But how should we store those 10 versions? In full format? Or zlib? This is an arbitrary choice with a clear tradeoff. For now, I choose zlib. If we wanted a little more speed at the expense of using a little more space, we could just keep those 10 versions in full form.
By choosing zlib for the most recent 10 revisions, now my "get the recent stuff" benchmark runs in 1.7 seconds no matter what scheme I use.
But we still care about performance for the case where somebody fetches an older version, even if that fetch doesn't happen as often. That's the point of version control storage. Every version has to be available. And when somebody does fetch version 495, we want our version control system to still be reasonably fast.
Since the more recent versions are retrieved more often, obviously, our chains are all going the wrong direction. If we had them go the other way, then retrieval would get slower as the versions get older instead of as the versions get newer.
But this approach doesn't lend itself well to the way version control repositories naturally grow in the wild. In these tests, I have mostly ignored the issues of constructing each storage scheme. I've already got all 508 versions, so I'm just fiddling around with different schemes of storing them all, comparing size and retrieval time.
In practice, those 508 versions happened one at a time, in order. If we're going to store the versions with backward chains, then each time we commit a new version of the file, we're going to need to re-encode something that was previously stored. This makes the commit operation slower. It is also a questionable idea from the perspective of data integrity. The safest way to maintain data is to not touch it after it has been written. Once it's there, leave it alone.
One case where we might want to be a bit more liberal toward rewriting data is in a "pack" operation, such as the one Git has. It wouldn't be terribly crazy to consider a standalone pack operation in a DVCS to be better than rewriting data for each commit, for several reasons:
Anyway, a pack operation would allow us to use storage schemes that do not work well on the fly, incrementally updating as each version comes in.
This plot makes it easier to see which schemes are better than others.
In my experimentation, I actually did a lot more schemes. For example, instead of key frames every 10 versions, I also tried every 5, 15 and 20. However, all those extra data points really cluttered the graph. So I only included the most important ones here.
Intuitively, the schemes which are closer to the origin are better. This graph makes it easy to see that "zlib" and "flowers" are probably the two most interesting options I have discussed here.


Kudlow Feeds Optimism That a China Trade Deal Is Within Reach 15 Nov 2019, 12:00 by Brendan Murray Bookmark(Bloomberg) --


Gutfeld on the impeachment circus
by Greg GutfeldPrepare to get your minds blown with eye-popping testimony!
Congratulations, Rep. Adam Schiff, D-Calif., you found something that made the Mueller hearing look sexy.
A witness who witnesses nothing. Hearsay based on hearsay. A bloated spectacle designed to turn a phone call into a crime.
REP. ANDY BIGGS: TRUMP IMPEACHMENT HEARINGS PROVE THAT 'WHISTLEBLOWER' MUST APPEAR AND TESTIFY
If only we could see this coming.
I guess they all got the same email from CNN President Jeff Zucker.
So the guilty verdict comes first, which brings us to this lame show trial. It’s aimed at ginning up public fears about the next “worst thing ever” that never happens, because this is never about what Trump has done. It’s about what he “could” do.

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But for a horror movie to be good, we have to believe it’s at least possible. And not already know how it’s going to end.
Actually, this is worse than a horror film. It's porn for Democrats. Remember their safe words?
"This sounds like a quid pro quo directed by the president," said CNN's Wolf Blitzer. "Very clear quid pro quo," said MSNBC's Lawrence O'Donnell. Many other television hosts and guests said the same thing.
No, you dopes. That’s called leverage. Using it on behalf of your country is Trump’s job, especially when he couldn’t trust anyone else to do it. Every day we heard of people trying to stop him, so what do you expect?
And how could we have a presidential candidate whose son is beholden to Ukraine and China? If Trump hadn’t investigated, that would have been impeachable.
Trump broke no laws. He may bend the rules a bit, but only because he has to do it, since the media and Democrats write the rulebook.
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That’s why this impeachment spectacle is just a repeat of the collusion spectacle. A mysterious source triggers a massive investigation that goes nowhere. We've seen it. We've done it. We've paid for it.
Skip it and show up next November. Give these clowns a hearing they'll never forget.
Adapted from Greg Gutfeld’s monologue on “The Five” on Nov. 13, 2019.


Mod migrations and version comparison functions.
local migration = require("__flib__.migration")
| format_version(version[, format="%02d"]) | Normalize version strings for easy comparison. |
| is_newer_version(old_version, current_version[, format=%02d]) | Check if current_version is newer than old_version. |
| run(old_version, migrations[, format="%02d"]) | Run migrations against the given version. |
| on_config_changed(event_data, migrations[, mod_name]) | Determine if migrations need to be run for this mod, then run them if needed. |
| MigrationsTable |
Normalize version strings for easy comparison.
Parameters: Returns: Usage:
migration.format_version("1.10.1234", "%04d")
migration.format_version("3", "%02d")
Check if current_version is newer than old_version.
Parameters: Returns:
Run migrations against the given version.
Parameters:
Determine if migrations need to be run for this mod, then run them if needed.
Parameters:
-- In on_configuration_changed:
if migration.on_config_changed(e, migrations) then
-- run generic (non-init) migrations
rebuild_prototype_data()
else
-- run post-init setup
unlock_recipes_for_cheating_forces()
end
Dictionary string –> function. Each string is a version number, and each value is a function that will be run for that version.
{
["1.0.1"] = function()
global.foo = nil
for _, player_table in pairs(global.players) do
player_table.bar = "Lorem ipsum"
end
end,
["1.1.0"] = function()
global.foo = "bar"
end
}