31 August 2009 - The Ministry of Health of Egypt has reported 2 new confirmed human case of avian influenza A(H5N1).
The first case is a 2 year-old female from Menofyia Governorate. Her symptoms started on 23 August. She was admitted to a fever hospital on 26 August, where she received oseltamivir treatment. The patient is in a stable condition.
The second case is an 14 year-old female from Damitta Governorate. Her symptoms started on 21 August. She was admitted to a fever hospital on 23 August, where she received oseltamivir treatment, and is in a stable condition.
Investigations into the source of infection indicated that both cases had close contact with dead and/or sick poultry.
The cases were confirmed by the Egyptian Central Public Health Laboratories.
Of the 85 cases confirmed to date in Egypt, 27 have been fatal.


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import logging
import traceback
[docs]class base_config_generator(object):
"""
The config generator determines how new configurations are sampled. This can take very different levels of
complexity, from random sampling to the construction of complex empirical prediction models for promising
configurations.
"""
def __init__(self, logger=None):
"""
Parameters
----------
directory: string
where the results are logged
logger: hpbandster.utils.result_logger_v??
the logger to store the data, defaults to v1
overwrite: bool
whether or not existing data will be overwritten
logger: logging.logger
for some debug output
"""
if logger is None:
self.logger=logging.getLogger('hpbandster')
else:
self.logger=logger
[docs] def get_config(self, budget):
"""
function to sample a new configuration
This function is called inside Hyperband to query a new configuration
Parameters
----------
budget: float
the budget for which this configuration is scheduled
returns: (config, info_dict)
must return a valid configuration and a (possibly empty) info dict
"""
raise NotImplementedError('This function needs to be overwritten in %s.'%(self.__class__.__name__))
[docs] def new_result(self, job, update_model=True):
"""
registers finished runs
Every time a run has finished, this function should be called
to register it with the result logger. If overwritten, make
sure to call this method from the base class to ensure proper
logging.
Parameters
----------
job: instance of hpbandster.distributed.dispatcher.Job
contains all necessary information about the job
update_model: boolean
determines whether a model inside the config_generator should be updated
"""
if not job.exception is None:
self.logger.warning("job {} failed with exception\n{}".format(job.id, job.exception))


This guide discusses how to read and write files from/to the device's local storage.
Reading and writing files — data in the form of plain text, JSON, XML, a local SQLite database, etc. — is essential to app development. There are countless cases when your app may need to read and/or write a file, but here are a few common instances:
Save/load user settings or other statistics.
Save the "app state" to a file and read it in a future session, so the user can return to exactly the same place where they left off, even if the app has exited.
Generate a local HTML file and load it in a native Web view.
Load data from a file that has been downloaded from a remote server and use that data in the app.
The system.pathForFile()
function is the foundation of all file operations in Corona. Lua requires the entire path of a file when reading and writing, but mobile operating systems such as iOS obscure the file system via "sandboxing." This makes it difficult to determine exactly where the file resides. Fortunately, Corona has simplified this with the system.pathForFile()
function (reference). This API returns a path that is compatible with Lua's file I/O functions.
system.pathForFile( filename [, baseDirectory] )
The baseDirectory
argument is an optional constant that corresponds to the base directory where the file is located. If not specified, the default is system.ResourceDirectory. See the System Directories section below for more information.
In the context of this guide, "writing" is synonymous with "saving" since you might need to generate new files as well as write to existing files.
Here's a basic example of how to write data to a file:
local saveData = "My app state data"
local path = system.pathForFile( "myfile.txt", system.DocumentsDirectory )
local file = io.open( path, "w" )
file:write( saveData )
io.close( file )
file = nil
system.pathForFile()
— this returns the path for the file to write, myfile.txt
. Also, note that the base directory is set to system.DocumentsDirectory
. This is important because, for security reasons, you can not write/save data to system.ResourceDirectory
.
io.open()
— this function opens the file for writing (or reading). It returns a new file handle, set to file
. The second argument, "w"
, corresponds to the "mode" that the file will be opened in. This dictates what you'll be doing with the file. In this case, "w"
indicates write and tells Corona to create (write) a new file, or overwrite the file if it already exists. For a complete list of I/O modes, see the io.open() documentation.
file:write()
— assuming the file is opened in write-compatible mode, the file:write()
method will write the specified string to the file handle. In this example, the contents of the saveData
variable are written to the specified file.
io.close()
— whenever you perform file operations and you're finished with the file handle, do not forget to call io.close()
. This method closes the file handle and ends the I/O process.
To read a file, just get the file path, open the I/O in read mode, and set the contents to a variable.
local path = system.pathForFile( "myfile.txt", system.DocumentsDirectory )
local file = io.open( path, "r" )
local savedData = file:read( "*a" )
io.close( file )
file = nil
system.pathForFile()
— once again, you'll need the path to the file that you want to read from. When reading files, you can specify any of the four system directories (see System Directories below). For example, if you include/bundle data files as part of your app, you can read these files from system.ResourceDirectory
.
io.open()
— this function opens the file and returns the file handle, set to file
in this example. This time, the second argument must be set to "r"
which corresponds to the read mode. For a complete list of I/O modes, see the io.open() documentation.
file:read()
— assuming the file is opened in read-compatible mode, the file:read()
method will read the contents of the file and set it to the variable savedData
. The argument for the read function specifies the format of the procedure. If you want to read the entire contents of the file (newline characters preserved), use "*a"
as in this example. Other formats are explained in the object:read() documentation.
io.close()
— as emphasized above, whenever you perform file operations and you're finished with the file handle, call io.close()
to close the file handle and end the I/O process.
Another common task when reading data is to process each line of a file and use it for some purpose. For example, if you have a text file representing a list of products along with a price for each, you can loop through the file by lines and output or parse each line (product) individually.
The file:lines()
function, in conjunction with a for
loop, accomplishes this:
local path = system.pathForFile( "myfile.txt", system.DocumentsDirectory )
local file = io.open( path, "r" )
for line in file:lines() do
print( line )
end
io.close( file )
file = nil
This process will return the next line on each iteration and continue until no more lines are available. Each line can be used in its entirety or parsed into smaller elements using string patterns. See the String Manipulation guide for details.
As noted above, system.pathForFile()
requires a baseDirectory
argument if you want to access a directory aside from the default system.ResourceDirectory
.
Here are all four available system directory constants for reading/writing:
| Directory | Permissions | Description | ||
|---|---|---|---|---|
system.ResourceDirectory
|
read |
This directory refers to the core project directory which is the same location as the main.lua file. This is the default base directory for system.pathForFile() .
|
||
system.DocumentsDirectory
|
read/write | This directory is intended for files that the app cannot regenerate on its own, for example user-specific data, "app state" data, or anything that the app generates post-installation. Files in this directory will persist for the lifetime of the app — that is, until the app is explicitly removed from the device. On iOS, files in this location are backed up by syncing unless you specify otherwise (see notes below). | ||
system.TemporaryDirectory
|
read/write | This directory is intended for single-session data. Files written to this location will generally persist as long as the app is running, but the operating system reserves the right to delete this data at any time. Thus, do not place important data in this directory. | ||
system.CachesDirectory
|
read/write |
Files in system.CachesDirectory tend to have a longer lifespan than those in system.TemporaryDirectory , but this is not reliable and you shouldn't place important data in this directory. On iOS, files in this location are not backed up by syncing.
|
On Android devices, there is no literal system.ResourceDirectory
because all resource files reside inside a compressed APK file. See Android File Restrictions below for more information.
In the Corona Simulator, equivalents of system.DocumentsDirectory
and system.TemporaryDirectory
are located in a sandboxed folder for each application. You can view these directories and the files within by selecting File → Show Project Sandbox in the Simulator.
On iOS and Mac OS X, the native.setSync()
API can be used to set the iCloud automatic backup flag for files in system.DocumentsDirectory
. See native.setSync() for more information.
When accessing system.ResourceDirectory
via system.pathForFile()
, setting the filename
parameter to nil
will return the directory path without checking if the file exists.
If you need to check for the presence of a file, examine Testing if Files Exist in the next section.
Subfolders can be added to system.DocumentsDirectory
and system.TemporaryDirectory
using the Lua File System (LFS).
Here's how to create an images
folder within system.DocumentsDirectory
.
local lfs = require( "lfs" )
--get raw path to documents directory
local docs_path = system.pathForFile( "", system.DocumentsDirectory )
--change current working directory
local success = lfs.chdir( docs_path ) --returns 'true' on success
local new_folder_path
local dname = "images"
if ( success ) then
lfs.mkdir( dname )
new_folder_path = lfs.currentdir() .. "/" .. dname
end
You can access files in a subfolder in two ways, depending on what you want to do with the file. If you want to display an image or play a sound from the subfolder, concatenate the subfolder name with the file name and then supply the base directory. For example, if you want to display the cat.png
file in the images
subfolder, do the following:
local catImage = display.newImage( "images/cat.png", system.DocumentsDirectory, 0, 0 )
Note that you don't use system.pathForFile()
in API calls that require a baseDirectory
parameter, for example display.newImage()
, display.newImageRect()
, audio.loadSound()
, etc.
If you want to access a file in a subfolder for reading or writing, do the following:
local path = system.pathForFile( "images/readme.txt", system.DocumentsDirectory )
local file = io.open( path )
If the file doesn't exist, it returns nil
— this leads to the next topic.
The following function can be used to test if a file exists in a folder or subfolder. Just remember to append the subfolder name to the file name before calling this function.
function doesFileExist( fname, path )
local results = false
local filePath = system.pathForFile( fname, path )
--filePath will be 'nil' if file doesn't exist and the path is 'system.ResourceDirectory'
if ( filePath ) then
filePath = io.open( filePath, "r" )
end
if ( filePath ) then
print( "File found: " .. fname )
--clean up file handles
filePath:close()
results = true
else
print( "File does not exist: " .. fname )
end
return results
end
--check for file in 'system.DocumentsDirectory'
local results = doesFileExist( "images/cat.png", system.DocumentsDirectory )
--check for file in 'system.ResourceDirectory'
local results = doesFileExist( "images/cat.png" )
The following function copies a file from one folder to another. This is useful if you need to copy a file bundled in system.ResourceDirectory
to system.DocumentsDirectory
. Note that you must create the destination subfolder before using this function.
function copyFile( srcName, srcPath, dstName, dstPath, overwrite )
local results = false
local srcPath = doesFileExist( srcName, srcPath )
if ( srcPath == false ) then
return nil -- nil = source file not found
end
--check to see if destination file already exists
if not ( overwrite ) then
if ( fileLib.doesFileExist( dstName, dstPath ) ) then
return 1 -- 1 = file already exists (don't overwrite)
end
end
--copy the source file to the destination file
local rfilePath = system.pathForFile( srcName, srcPath )
local wfilePath = system.pathForFile( dstName, dstPath )
local rfh = io.open( rfilePath, "rb" )
local wfh = io.open( wfilePath, "wb" )
if not ( wfh ) then
print( "writeFileName open error!" )
return false
else
--read the file from 'system.ResourceDirectory' and write to the destination directory
local data = rfh:read( "*a" )
if not ( data ) then
print( "read error!" )
return false
else
if not ( wfh:write( data ) ) then
print( "write error!" )
return false
end
end
end
results = 2 -- 2 = file copied successfully!
--clean up file handles
rfh:close()
wfh:close()
return results
end
--copy 'readme.txt' from the 'system.ResourceDirectory' to 'system.DocumentsDirectory'.
copyFile( "readme.txt", nil, "readme.txt", system.DocumentsDirectory, true )
File access in Corona is based on the underlining operating system which varies by platform. On iOS devices, you can access files in all of the directories described above. On Android, however, there is no literal system.ResourceDirectory
because all resource files reside inside a compressed APK file.
Corona allows direct loading of images and audio files using the appropriate APIs, but it has limited access to resource files on Android using the file I/O APIs. Specifically, the following types can not be read from the resources directory: .html
, .htm
., .3gp
, .m4v
, .mp4
, .png
, .jpg
, and .ttf
.
Because of this limitation, if you have files of these types bundled in the core directory that you need to copy to another directory, you must change the file name so it can be accessed by the file I/O APIs. For example, if you want to move cat.png
from the resource directory to the documents directory, it must be renamed cat.png.txt
to be copied.
Here's how to copy cat.png
to the documents directory on Android, assuming it's stored as cat.png.txt
. This technique works for all platforms, so if you make it work for Android, it will work everywhere.
copyFile( "cat.png.txt", nil, "cat.png", system.DocumentsDirectory, true )
local catImage = display.newImage( "cat.png", system.DocumentsDirectory, 0, 100 )


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| make_style {crayon} | R Documentation |
Create a style, or a style function, or both. This function is intended for those who wish to use 256 ANSI colors, instead of the more widely supported eight colors.
make_style(..., bg = FALSE, grey = FALSE, colors = num_colors())
... |
The style to create. See details and examples below. |
bg |
Whether the color applies to the background. |
grey |
Whether to specifically create a grey color. This flag is included because ANSI 256 has a finer color scale for greys than the usual 0:5 scale for R, G and B components. It is only used for RGB color specifications (either numerically or via a hexa string) and is ignored on eigth color ANSI terminals. |
colors |
Number of colors, detected automatically by default. |
The crayon package comes with predefined styles (see
styles()
for a list) and functions for the basic eight-color
ANSI standard (red
, blue
, etc., see crayon).
There are no predefined styles or style functions for the 256 color
ANSI mode, however, because we simply did not want to create that
many styles and functions. Instead, make_style()
can be
used to create a style (or a style function, or both).
There are two ways to use this function:
If its first argument is not named, then it returns a function that can be used to color strings.
If its first argument is named, then it also creates a
style with the given name. This style can be used in
style()
. One can still use the return value
of the function, to create a style function.
The style (the code... argument) can be anything of the following:
An R color name, see colors()
.
A 6- or 8-digit hexa color string, e.g. #ff0000
means
red. Transparency (alpha channel) values are ignored.
A one-column matrix with three rows for the red, green
and blue channels, as returned by col2rgb
(in the base
grDevices package).
make_style()
detects the number of colors to use
automatically (this can be overridden using the colors
argument). If the number of colors is less than 256 (detected or given),
then it falls back to the color in the ANSI eight color mode that
is closest to the specified (RGB or R) color.
See the examples below.
A function that can be used to color strings.
Other styles:
drop_style()
## Create a style function without creating a style pink <- make_style("pink") bgMaroon <- make_style(rgb(0.93, 0.19, 0.65), bg = TRUE) cat(bgMaroon(pink("I am pink if your terminal wants it, too.\n"))) ## Create a new style for pink and maroon background make_style(pink = "pink") make_style(bgMaroon = rgb(0.93, 0.19, 0.65), bg = TRUE) "pink" %in% names(styles()) "bgMaroon" %in% names(styles()) cat(style("I am pink, too!\n", "pink", bg = "bgMaroon"))


Body found in Nevada desert is that of missing Pennsylvania woman
by The Associated PressBETHEL PARK, Pa. — Authorities in have confirmed a body found last month in a Nevada desert is that of a Pennsylvania woman who disappeared in September.
Officials in Nevada on Thursday announced dental records were used to identify 33-year-old Jamie Feden.
Police in Pennsylvania have charged her boyfriend, 39-year-old John Chapman of Oakland, Maryland, with kidnapping. They also say he confessed to killing her.
Chapman allegedly told police the couple drove to Nevada and he took Fedon into the desert about 170 miles north of Las Vegas. Police say he told them he bound her to a sign post and placed duct tape over her nose and mouth until she suffocated.
Her body reportedly was found Oct. 5 by a Las Vegas man who was on an excursion with his son and a friend when they stopped to stretch their legs near the site.
Chapman remains held in the Allegheny County Jail pending extradition to Nevada, where he faces a murder charge.
It’s not known if Chapman has a lawyer.


{% extends "two_factor/_base_focus.html" %} {% load i18n %} {% block content %}
{% blocktrans %}The page you requested, enforces users to verify using two-factor authentication for security reasons. You need to enable these security features in order to access this page.{% endblocktrans %}
{% blocktrans %}Two-factor authentication is not enabled for your account. Enable two-factor authentication for enhanced account security.{% endblocktrans %}
{% trans "Go back" %} {% trans "Enable Two-Factor Authentication" %}
{% endblock %}


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Created by
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on Feb 14, 2016
Feel free to add useful links here.
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--- layout: page title: Lean Prover Zulip Chat Archive permalink: archive/113489newmembers/11734reversingneq.html ---
If I have h : ¬(a=b)
, what's the canonical name for ¬(b=a)
?
ne.symm h
If h
is literally a ne
you can use projection notation


class Timer implements TimerInterface
Methods
| __construct(Clock $clock, $interval, $callback, $periodic = false, $iterations = INF, $data = null) | ||
| Clock | getClock() | |
| getInterval() | ||
| getCallback() | ||
| setData($data) | ||
| getData() | ||
|
decrementIterations()
Removes an iteration. |
||
|
getIterations()
Returns remaining iterations. |
||
| isPeriodic() | ||
| isActive() | ||
| cancel() |
Details
at line 24
public
__construct(Clock $clock, $interval, $callback, $periodic = false, $iterations = INF, $data = null)
at line 45
public Clock
getClock()
at line 53
public
getInterval()
at line 61
public
getCallback()
at line 69
public
setData($data)
at line 77
public
getData()
at line 85
public
decrementIterations()
Removes an iteration.
at line 93
public
getIterations()
Returns remaining iterations.


|
VirtualSCADA
1.0
VirtualSCADA Senior Design Project
|
Public Member Functions | |
| __construct ($environment, $debug) | |
| init () | |
| __clone () | |
| boot () | |
| terminate (Request $request, Response $response) | |
| shutdown () | |
| handle (Request $request, $type=HttpKernelInterface::MASTER_REQUEST, $catch=true) | |
| getBundles () | |
| isClassInActiveBundle ($class) | |
| getBundle ($name, $first=true) | |
| locateResource ($name, $dir=null, $first=true) | |
| getName () | |
| getEnvironment () | |
| isDebug () | |
| getRootDir () | |
| getContainer () | |
| loadClassCache ($name= 'classes', $extension= '.php') | |
| setClassCache (array $classes) | |
| getStartTime () | |
| getCacheDir () | |
| getLogDir () | |
| getCharset () | |
| serialize () | |
| unserialize ($data) | |
| Public Member Functions inherited from KernelInterface | |
| registerBundles () | |
| registerContainerConfiguration (LoaderInterface $loader) | |
Static Public Member Functions | |
| static | stripComments ($source) |
Data Fields | |
| const | VERSION = '2.6.6' |
| const | VERSION_ID = '20606' |
| const | MAJOR_VERSION = '2' |
| const | MINOR_VERSION = '6' |
| const | RELEASE_VERSION = '6' |
| const | EXTRA_VERSION = '' |
| Data Fields inherited from HttpKernelInterface | |
| const | MASTER_REQUEST = 1 |
| const | SUB_REQUEST = 2 |
Protected Member Functions | |
| getHttpKernel () | |
| doLoadClassCache ($name, $extension) | |
| initializeBundles () | |
| getContainerClass () | |
| getContainerBaseClass () | |
| initializeContainer () | |
| getKernelParameters () | |
| getEnvParameters () | |
| buildContainer () | |
| prepareContainer (ContainerBuilder $container) | |
| getContainerBuilder () | |
| dumpContainer (ConfigCache $cache, ContainerBuilder $container, $class, $baseClass) | |
| getContainerLoader (ContainerInterface $container) | |
Protected Attributes | |
| $bundles = array() | |
| $bundleMap | |
| $container | |
| $rootDir | |
| $environment | |
| $debug | |
| $booted = false | |
| $name | |
| $startTime | |
| $loadClassCache | |
The Kernel is the heart of the Symfony system.
It manages an environment made of bundles.
Definition at line 46 of file Kernel.php.
| __construct | ( | $environment, | |
| $debug | |||
| ) |
Constructor.
| string | $environment | The environment |
| bool | $debug | Whether to enable debugging or not |
Definition at line 78 of file Kernel.php.
| __clone | ( | ) |
Definition at line 99 of file Kernel.php.
| boot | ( | ) |
|
protected |
Builds the service container.
Definition at line 604 of file Kernel.php.
|
protected |
Definition at line 428 of file Kernel.php.
|
protected |
Dumps the service container to PHP code in the cache.
| ConfigCache | $cache | The config cache |
| ContainerBuilder | $container | The service container |
| string | $class | The name of the class to generate |
| string | $baseClass | The name of the container's base class |
Definition at line 680 of file Kernel.php.
| getBundle | ( | $name, | |
$first = true |
|||
| ) |
{Returns a bundle and optionally its descendants by its name.
| string | $name | Bundle name |
| bool | $first | Whether to return the first bundle only or together with its descendants |
Implements KernelInterface.
Definition at line 232 of file Kernel.php.
| getBundles | ( | ) |
{Gets the registered bundle instances.
Implements KernelInterface.
Definition at line 204 of file Kernel.php.
| getCacheDir | ( | ) |
{Gets the cache directory.
Implements KernelInterface.
Definition at line 403 of file Kernel.php.
| getCharset | ( | ) |
{Gets the charset of the application.
Implements KernelInterface.
Definition at line 423 of file Kernel.php.
| getContainer | ( | ) |
{Gets the current container.
Implements KernelInterface.
Definition at line 358 of file Kernel.php.
|
protected |
Gets the container's base class.
All names except Container must be fully qualified.
Definition at line 516 of file Kernel.php.
|
protected |
Gets a new ContainerBuilder instance used to build the service container.
Definition at line 661 of file Kernel.php.
|
protected |
Gets the container class.
Definition at line 504 of file Kernel.php.
|
protected |
Returns a loader for the container.
| ContainerInterface | $container | The service container |
Definition at line 704 of file Kernel.php.
| getEnvironment | ( | ) |
{Gets the environment.
Implements KernelInterface.
Definition at line 323 of file Kernel.php.
|
protected |
Gets the environment parameters.
Only the parameters starting with "SYMFONY__" are considered.
Definition at line 585 of file Kernel.php.
|
protected |
|
protected |
Returns the kernel parameters.
Definition at line 555 of file Kernel.php.
| getLogDir | ( | ) |
{Gets the log directory.
Implements KernelInterface.
Definition at line 413 of file Kernel.php.
| getName | ( | ) |
{Gets the name of the kernel.
Implements KernelInterface.
Definition at line 309 of file Kernel.php.
| getRootDir | ( | ) |
{Gets the application root dir.
Implements KernelInterface.
Definition at line 343 of file Kernel.php.
| getStartTime | ( | ) |
{Gets the request start time (not available if debug is disabled).
Implements KernelInterface.
Definition at line 393 of file Kernel.php.
| handle | ( | Request | $request, |
$type = HttpKernelInterface::MASTER_REQUEST , |
|||
$catch = true |
|||
| ) |
| init | ( | ) |
Definition at line 95 of file Kernel.php.
|
protected |
Initializes the data structures related to the bundle management.
Definition at line 446 of file Kernel.php.
|
protected |
Initializes the service container.
The cached version of the service container is used when fresh, otherwise the container is built.
Definition at line 527 of file Kernel.php.
| isClassInActiveBundle | ( | $class | ) |
{Checks if a given class name belongs to an active bundle.
| string | $class | A class name |
Implements KernelInterface.
Definition at line 216 of file Kernel.php.
| isDebug | ( | ) |
{Checks if debug mode is enabled.
Implements KernelInterface.
Definition at line 333 of file Kernel.php.
| loadClassCache | ( | $name = 'classes' , |
|
$extension = '.php' |
|||
| ) |
Loads the PHP class cache.
This methods only registers the fact that you want to load the cache classes. The cache will actually only be loaded when the Kernel is booted.
That optimization is mainly useful when using the HttpCache class in which case the class cache is not loaded if the Response is in the cache.
| string | $name | The cache name prefix |
| string | $extension | File extension of the resulting file |
Definition at line 375 of file Kernel.php.
| locateResource | ( | $name, | |
$dir = null , |
|||
$first = true |
|||
| ) |
Returns the file path for a given resource.A Resource can be a file or a directory.The resource name must follow the following pattern:
<EMAIL_ADDRESS>BundleName is the name of the bundle and the remaining part is the relative path in the bundle.If $dir is passed, and the first segment of the path is "Resources", this method will look for a file named:
$dir/<BundleName>/path/without/Resourcesbefore looking in the bundle resource folder.
| string | $name | A resource name to locate |
| string | $dir | A directory where to look for the resource first |
| bool | $first | Whether to return the first path or paths for all matching bundles |
Implements KernelInterface.
Definition at line 250 of file Kernel.php.
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protected |
Prepares the ContainerBuilder before it is compiled.
| ContainerBuilder | $container | A ContainerBuilder instance |
Definition at line 635 of file Kernel.php.
| serialize | ( | ) |
Definition at line 774 of file Kernel.php.
| setClassCache | ( | array | $classes | ) |
Used internally.
Definition at line 383 of file Kernel.php.
| shutdown | ( | ) |
{Shutdowns the kernel.This method is mainly useful when doing functional testing.}
Implements KernelInterface.
Definition at line 159 of file Kernel.php.
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static |
| unserialize | ( | $data | ) |
Definition at line 779 of file Kernel.php.
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protected |
Definition at line 58 of file Kernel.php.
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| const EXTRA_VERSION = '' |
Definition at line 68 of file Kernel.php.
| const MAJOR_VERSION = '2' |
Definition at line 65 of file Kernel.php.
| const MINOR_VERSION = '6' |
Definition at line 66 of file Kernel.php.
| const RELEASE_VERSION = '6' |
Definition at line 67 of file Kernel.php.
| const VERSION = '2.6.6' |
Definition at line 63 of file Kernel.php.
| const VERSION_ID = '20606' |
Definition at line 64 of file Kernel.php.


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Where the Head of School/Area or nominee has a conflict of interest with the proposed research, e.g. an investigator on the project, a member of the research group, or a personal relationship to any member of the research team, this Declaration is to be completed by the Deputy Head).
I declare that:
- I am satisfied that the research proposal is ready for submission for ethics approval.
- The resources to undertake this project are available.
- The researchers have the skill and expertise to undertake this project appropriately.
|


This Scatter chart shows sample financial data. It looks like it does because there are many datapoints.
This goes in the documents header:<script src="RGraph.common.core.js"></script> <script src="RGraph.scatter.js"></script>Put this where you want the chart to show up:
<canvas id="cvs" width="600" height="200"> [No canvas support] </canvas>This is the code that generates the chart - it should be placed AFTER the canvas tag(s):


Ok, so the show goes live in a little over 2 hours. The show formally starts at 11am EST and typically runs until 1pm.
What is Sounds of Steem?
Every Saturday I put together a team of Steemians to showcase some of their work, creativity, and help the audience get to know another batch of Steemians.
The second Saturday of every month is dedicated to Sounds of Steem, where I work with @isaria and @krystle to put together a group of highly talented musicians to play music live for the community. These folks are singers and song writers and represent high quality music.
If you’re like me you get sick of all the low quality, highly repetitive, vapid music that’s available on the radio. It’s just a million iterations of shitty love stories played over and over again. What I love about this community is that real content actually makes it through. You can feel actual human emotion. You can hear a story that’s touching, has meaning, and reflects how people are coping with the world around us.
Comedian Bo Burnham has a pretty funny song about just how crappy mainstream music is-
Anyway, the music here is not only good, but at times draw droppingly good. I encourage you all to join us and hear these very gifted performers share their craft with us.
Logistics
Show starts at 11am today. I’ll put on a few songs prior to that starting around 10:30 to let the guests get sound checked and tweak discord. You can join us by hopping into the Peace, Abundance, and Liberty Network.
If you’re brand new please follow the instructions that are DMed to you to register your Discord and Steem account.
If you’re returning or after you’ve registered please go to https://discord.gg/BS8WTzM if you’d like to chat with the hosts, performers and audience.
Go here- https://discord.gg/pGHjVtc if you’d like to listen to the show in Discord
Go to mspwaves.com/listen if you’d like to listen on Twitch
if you’re going to be live on air please do a sound check in here: https://discord.gg/hesUJmg
Witness project
Just a reminder that this is part of my ongoing witness project. I’m here to help build community. The Sounds of Steem concert series is a way to support the music community on Steem and help attract a larger audience for the music and a broader set of artists looking to perform and get paid for their work. It’s within the framework of the Minnow Support Project housed in the Peace, Abundance, and Liberty Network Discord channel, which is now home to 15,000 Steemians.
If you value having the community gathering spot of PALnet, appreciate the support minnows get through MSP, or like the radio shows coming from msp-waves to grow the community as a whole please consider voting for my Witness if you haven’t already (6,000 of you have, so thank you for that!).
This page is synchronized from the post: ‘Sounds of Steem Volume 2 just a few hours away! Live on MSP-Waves’


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MASS-BUG(1) MASS-BUG(1) NAME mass-bug - mass-file a bug report against a list of packages SYNOPSIS mass-bug [options] --subject="bug subject" template package-list DESCRIPTION mass-bug assists in filing a mass bug report in the Debian BTS on a set of packages. For each package in the package-list file (which should list one package per line together with an optional version number separated from the package name by an underscore), it fills out the template, adds BTS pseudo-headers, and either displays or sends the bug report. Warning: Some care has been taken to avoid unpleasant and common mistakes, but this is still a power tool that can generate massive amounts of bug report mails. Use it with care, and read the documentation in the Developer's Reference about mass filing of bug reports first. TEMPLATE The template file is the body of the message that will be sent for each bug report, excluding the BTS pseudo-headers. In the template, #PACKAGE# is replaced with the name of the package. If a version was specified for the package, #VERSION# will be replaced by that version. The components of the version number may be specified using #EPOCH#, #UPSTREAM_VERSION# and #REVISION#. #EPOCH# includes the trailing colon and #REVISION# the leading dash so that #EPOCH#UPSTREAM_VERSION##REVISION# is always the same as #VERSION#. Note that text in the template will be automatically word-wrapped to 70 columns, up to the start of a signature (indicated by '--Â ' at the start of a line on its own). This is another reason to avoid including BTS pseudo-headers in your template. OPTIONS mass-bug examines the devscripts configuration files as described below. Command line options override the configuration file settings, though. --severity=(wishlist|minor|normal|important|serious|grave|critical) Specify the severity with which bugs should be filed. Default is normal. --display Fill out the templates for each package and display them all for verification. This is the default behavior. --send Actually send the bug reports. --subject="bug subject" Specify the subject of the bug report. The subject will be automatically prefixed with the name of the package that the bug is filed against. --tags Set the BTS pseudo-header for tags. --user Set the BTS pseudo-header for a usertags' user. --usertags Set the BTS pseudo-header for usertags. --source Specify that package names refer to source packages rather than binary packages. --sendmail=SENDMAILCMD Specify the sendmail command. The command will be split on white space and will not be passed to a shell. Default is /usr/sbin/sendmail. --no-wrap Do not wrap the template to lines of 70 characters. --no-conf, --noconf Do not read any configuration files. This can only be used as the first option given on the command-line. --help Provide a usage message. --version Display version information. ENVIRONMENT DEBEMAIL and EMAIL can be set in the environment to control the email address that the bugs are sent from. CONFIGURATION VARIABLES The two configuration files /etc/devscripts.conf and ~/.devscripts are sourced by a shell in that order to set configuration variables. Command line options can be used to override configuration file settings. Environment variable settings are ignored for this purpose. The currently recognised variables are: BTS_SENDMAIL_COMMAND If this is set, specifies a sendmail command to use instead of /usr/sbin/sendmail. Same as the --sendmail command line option. COPYRIGHT This program is Copyright (C) 2006 by Joey Hess<EMAIL_ADDRESS>It is licensed under the terms of the GPL, either version 2 of the License, or (at your option) any later version. AUTHOR Joey Hess<EMAIL_ADDRESS>Debian Utilities 2013-12-23 MASS-BUG(1)


BAPS Controller
The BAPS Controller is a hardware device that allows switch boxes to be connected to control certain BAPS functions.
- BAPS Paddle
The BAPS Paddle is a small hand-held box which can be set to control a variety of functions.
- BAPS Fader/Button start
This will interface to the desk to enable automatic fader and button starts. This functionality is not yet complete.
- BAPS AudioWall Keypad
The AudioWall keypad will have a matrix of 20 buttons on it in order to control the 20 corresponding buttons on the AudioWall. This functionality is not yet complete.


Nursery Rhymes
humpty Dumpty
Baa Baa Black Sheep
A B C D E F G
Incy WIncy SPider
Old McDonald had a farm
cbeebies - Justin
cbeebeis - Justin House
Number Jacks
Player


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Your favourite game!!
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In week 8 we are going to learn about Computer-controlled machining. In week 6 we learn about the addictive manufacturing process where we make
the product by adding the layers of the materials layer by layer. Week 8 is introducing the second manufacturing process which is the Material removing process,
in which components are made by removing unwanted materials, metal removing processes are relatively fast.
Week 8's Assignment was to Make something Big using the CNC.
CNC machining is a manufacturing process in which pre-programmed computer software dictates the movement of factory tools and machinery. The process can be used to control a range of complex machinery, from grinders and lathes to mills and routers. With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts.
 I cho0se Planetary gear because I want to know how I can use different parameters to make perfect rotating pairs of gears. Gears have so many parameters and they should be accurate in the process of making to have working gears.
A planetary gearbox is a gearbox with the input shaft and the output shaft aligned. A planetary gearbox is used to transfer the largest torque in the most compact form. Click here to know different types of gears.
Law of gearing
The angular velocity ratio of all gears of a meshed gear system must remain constant also the common normal at the point of contact must pass through the pitch point.
If w1 and w2 are the angular velocities and D1 and D2 are Diameters of two gears meshed together then w1/w2 = D2/d1 should satisfy. Pitch point - the point of contact of the pitch
lines of two gears or of a rack and pinion when in the mesh.Click here to know in details about gear types and Terminology.
Basically, Every parameter is connected to each other and that’s why we don’t have to keep track of every parameter, instead we need only values of Module of gear, Gear ration, pitch diameter,
Pitch circle, Backlash, Diametral pith.
Module of gear
The module of gear determines the size of the teeth in the gear.
The module of gear determines the size of the teeth in the gear.
"Module" is the unit of size that indicates how big or small a gear is. It is the ratio of the reference diameter of the gear divided by the number of teeth.
Thus, m=D/Z.
D is the Reference diameter of gear(Pith Diameter).
Zis the number of Teeth.
It describes the relationship between the pitch diameter and the Number of teeth on the gear. For meshing of Two gears Modules of two gears should be same , otherwise law of gearing will not satisfy.
reference Diameter(pitch Diameter)
It is equal to the circumference divided by
Circumference the number of teeth.
Circumference Pitch = Circumference(pi* D(Pith Diameter)) / Number of teeth.
It defines the distance between two points of adjacent teeth located at the same location on each teeth. Click here to know more.
Pitch circle
An imaginary circle passing through the teeth of a gearwheel, concentric with the gearwheel, and having a radius that would enable it to be in contact with a similar circle around a mating gearwheel.
Gear Ratio
Gear Ratio expresses the relationship between a Driving Gear (the gear connected to the input power source, such as a motor) and a Driven Gear (the gear connected to the output, such as a wheel or mechanism) in a system.
Gear ratio is a very important parameter that determines the Applications of the gears, Output speed, Number of Teeth in individual gears.
Click Here To know more about gear ratio.
Backlash
Backlash, a clearance between mating gear teeth, is built into speed reducers to let the gears mesh without binding and to provide space for a film of lubricating oil between the teeth. This prevents overheating and tooth damage.
Diametral Pitch
It is defined as the number of teeth per inch of the diameter of the pitch circle of gear.
I started designing gears in AutoCAD, since I was going to use 3rd party softwareto design the gears I was just focusing on the pitch diameter only.
I want to make parametric relations between the circles because I was intended to make one prototype first.
Pitch circles of planetary gear
I started with pitch circles because it makes it easy to predict mesh between the gears.
Multi-ring gear
I wanted to try this concept, I was not sure working of it, but I created one sketch anyway. For making these types of designs you should have knowledge of Constrains and Array polar command(Click here). visit Week3 To know about parametric designs.
Paramtric relation
The reason I want to design in parametric is, I can do much faster iterations on my design, I was working with it first time and I know In prototyping I will have some kerfing problems. I was also not sure
about dimensional tolerance in CNC in the real model, I thought it will take many experiments.
I set dimensions of the pitch circle the way it will give gear reduction of 3, in which the output shaft will rotate one-third of the input shaft.
Image below describes the Gear ratio/ gear reduction relations between the radius of sun gear (s) and the Ring gear (r). Here I am repeatedly talking about gear reduction because Planetary gear is known to reduce the output
shaft speed to increase the torque in drive applications in a compact size, we can also increase the speed to third by taking input as a ring here.
Parameters
This picture shows the parametric relation between gears and ring, my main parameter here is Sun gear Diameter.
Here I kept sun gear Diameter 60 mm for the prototype. It changes the planet and ring gear diameter accordingly. a is the Diameter for Shafts or Wooden dowels (On Axle).
Parametric
You can understand it better below. the original file can be downloaded here.
After Finalizing my parameters I have to design the cad model for the proper way of understanding in joining and frame of Gear assembly. Since it was a critical and time-consuming part to make my own teeth design I decided to take the
help of software or plugins.
I found good web pages and software which can help in gear design.
All links are great for gear design but I choose the FM gear plugin for fusion360, reasons were they have some design limits or their full versions are paid or they do not support internal gear type. fusion360 has also a Plugin for gear but only supports spur gears not internal.
FM gear plugins
So, I used to plug in for the fusion360 " FM gears" for generating gears. To run the script go to the "Add-ins and script" infusion 360 and ad FM gears, Then open the FM gears from create menu.
Parameters
These are the parameter You can give on the FM module, Everything else will be controlled by the inter-relations of parameters then. I kept the Unit system to standard Metric because I am not familiar with the
English parameter.
Pressure angle: I kept the pressure angle 20 degree here. there are three standard pressure angles 14.5, 20.25.
Pressure angle: Pressure angle in relation to gear teeth, also known as the angle of obliquity, is the angle between the tooth face and the gear wheel tangent. It is more precisely the angle at a pitch point between the line of pressure (which is normal to the tooth surface) and the plane tangent to the pitch surface. The pressure angle gives the direction normal to the tooth profile.
Lower the pressure angle higher will be power transmission( in terms of pressure angle). But higher pressure angle will give good loading ability(Torque) and increase the stress as well.
Since I have an application of torque and I did not want my teeth to break I kept it to 20 degrees.
Here module will take control of the number of teeth, the higher the module laser the number of teeth. but I should be kept at an optimum value to have smooth power transmission. I kept Module: 2.
Sun gear
Starting importing gears.
Ring gear
Inner ring
There is one judged here. I wanted to have teeth both sides of the ring but FM gear has not to feature like that so I made a different outer ring of which inner diameter less big than the outer diameter of the inner ring.
Second Ring
Combine Tool
Then I used a combined tool to join both bodies.
Combining Two gears
Setting up three gears
Multiple rings
I was told multi-ring gear will be very difficult for This time limit, because not every gear can be free in designing some of them needs to be fixed with the frame itself. Since I had a hard time visualizing the mechanism in this design I decided to go for the first stage. so I went for only one stage Planetary gear.
Renders
I render it anyway by hoping I will try it one day. You can download original files from Here.
Making DFX files from the Fusion
Another reason I want to work on fusion is I can directly export the DXF file from the sketch itself. We can export the .DXF format from the sketch.
Import it to Autocad for cutting.
I have to make one prototype before going to CNC. you can see the laser cutting procedure on week4. the original file can be downloaded here.
output
I am using MDF 3 mm for prototyping.
Power = 55%
Speed = 15 mm/s
In laser cutting, kerfing is going to be sure. I got a difference of 2 mm in teeth spacing since I got stuck in pitch diameter I assume it would be 0.5 mm for each gear and component pith diameter(Increased ) In laser cutting kerfing is going to be sure. I got a difference of 2 mm in teeth spacing since I got stuck in pitch diameter I assume it would be 0.5 mm for each gear and component pith diameter(Increased Diameter by 0.5 mm).
Second try
It came out perfect. now I can work on full gear assembly. Then I made an axle for planetary gear, it will help to get output.
Nylon Screws
I was going to use nylon screws for my output and input shafts and replacement of dowels for prototyping.
since I know which pitch diameter will be good for me I went for a framework of gear, big help from my friend Samiul Hoque for clearing my concept about
gear frame, I have to decide which gear I am going to fix and I fixed my ring gear with frame.
go to Week3 here to know about
fusion360 tools. Original file can be downloaded here.
laser cutting
I was using my labs recycle materials, since my MDF sheet was finished I had to do my work on Acrylic.
Finalizing Perfect diameter
I have to make 3 prototype cuts for my design.
First one :
I gave dimensions same as mdf sheet to test. (0.5 mm additional).
Sun gear : 60.5 mm
planet gear : 30.5 mm
Ring gear : 119.5 mm
I knew it might work because it was designed for MDF but I want to know how much it loses. I found it was spacing 1.5 mm on one side. for the component that I directly added 1 mm in sun and planet and decrease the same from the ring.
second one :
(1 mm additional)
Sun gear : 61 mm
planet gear : 31 mm
Ring gear : 119 mm
And it was a bad idea, now Ring gear, now Ring gear was small for sun and planet to assemble, I hardly placed planet in assembly but it will surely break if I try to force it in more then a few times. so my two models fail. but I found one solution though. I Checked if I took sun and planet of version 1 and ring of version 2 I was giving perfect result. not too tight not too loose.
Third one :
Sun gear : 60.5 mm
planet gear : 30.5 mm
Ring gear : 119 mm
It worked, I was marking every version so did not get confuse on them. Then I made three sets of dimensions of last one to glue them and made one frame to support the ring gear.
Gluing gears with chloroform
I was never good at joining the stuff, here my friend Maharshi Solanki is helping me to glue the gears properly. Nice making Making experience though.
Clearance
I also build an axle to support the planetary gear. I gave them some of the clearance which waste cuts and dummy rings. I also place bearings between the Shaft (Nylon screws) and Planet gears.
Working mechanism
It was so nice to gear working, it was not possible without the help of Maharshi and Samiul.
final assembly
My prototype was ready I can work on my CNC design.
Things I learned
I get to learn during prototype making, it clear my idea halfway I also found which things I should take care of in my final design for example.
After analyzing the Prototype I started working on my CNC model.
For CNC models I wanted to use these materials efficiently, and instead of two axles back and forth of the gear assembly, I decided to use only one axle. it will definitely help me save the material and I can use it for
another CNC work.
dowels
So if I wanted to use one axle, I need to use taper dowels in which, Wedge Action will help to Fix the Bearings with the help of Friction. Click here to know about Wedge Action. My dowels have varying Diameter from 18 to 21 mm.
Creating CNC Files
After fixing my dowel Dimensions around 20 mm (in the center), I started designing for the Main gear files for CNC cut. My CNC file is also parametric. so I can have good flexibility in design changes. Below are the
Parameters and the relations I gave on Desing. the design procedure is the same as I explained in prototype file. Here I used pitch circles as references , according to it I am going to generate gear profiles.
I want to cut the output disk later, if sun and ring gear will work perfectly after assembly and able to load after I will cut it, reason I put disk there is to make sure of some space.
Parameters
Below are independent parameters
Outer Diameter of ring gear : ring1
Clearance : c. Clearance I gave from the original size is 30 mm from one size.
Width of the material sheet : widthouter
Length of the material sheet : lengthouter
parametric GIF
So as I decided both the frame and the planet gear assembly will change accordingly.
Deciding the inner diameter for Planet gears
So for planet gears, I have to decide the inner diameter, I have a bearing diameter(outer) of 47 mm so I have to check which inner diameter of the planet gear will be good. since I have to check for the holder also I did
some experiment cuts to know which dimensions will be good for assembly, since Dowels are tapers, I can't have an exact idea which dimension will work properly.
So I cut some and found the exact one, I generated a code file on partworks 3.5.
For now, I made some conclusions about inner diameters.
Inner diameter of Ring gear : 47.5 mm
Diameter for the Holders : 19.5 mm
Design in Fusion-360
After knowing the pitch diameter I generated a gear profile on fusion-360. The process of generating the gear profile is the same as I mentioned above in prototyping. after generating profiles
and manual
check on the cad I generated DXF files for each type of gear.
Here I didn't generate the inner diameter of gears, that part I can do in Autodesk after generating .DXF files.
Back to autodesk
After then I arranged profiles according to the sheet. The reason I pit small holes around profiles is for screws, I noticed in CNC we spent much time in mounting the sheet and it is a tedious job, sometimes we need to
mount screws in between the sheets. but the main problem is screws can be in way of our toolpath and we never know exactly how far it is from the main tool path, I saw some screws are cut from the tool so far.
So the solution I came with is to use Pockets. I was going to cut Pockets in a sheet of 1 or 2 mm and place the screws there. so I can have a perfect location where can I put the screws and the main
advantage is if I have to change the location of the profile I will know where to put the new profile exactly.
One can Download the CNC bed file from the sidebar.
using Reusable sheets
In the lab, I found we have one sheet which I can use for my sun, ring and axle and it will help me to know about cutting clearance, if I have to give the component the kerf or not. so I went
to cut these three profiles. after making these cutting files separate I went for a cut on CNC.
I uploaded files in .dxf 2004 version.
Partworks is a software solution for cutting and creating different shapes in CNC. Partworks can help to generate 3d patterns with profiles, Pockets, Drills. with the
partworks-3D user can able to do 2.5D cut or 3D milling.
Click here to see 3d milling in Partworks 3D in Week 10. Click here to know more about partworks.
partworks
In part works before importing the sketch, we have to give Bad size - cutting sheet size. to do that click create a new file.
bad size
There is a small issue between our CNC and partworks software, they have a different orientation. Axis orientation differs by 90 degree anticlockwise.
In our CNC,
X axis - Width : 1200 mm
Y axis - Length : 2400 mm
But since axis orientation is different in CNC and the partworks I have to interchange the values of Width and Length because they are differ by 90 degrees anticlock.
In Partworks
X axis - Lenth : 2400 mm
Y axis - Width: 1200 mm
Material thickness : 12 mm
Units : mm , Units should be the same with the software you exported files, otherwise it will scale up or scale down according to mm and inch scale.
Tools
create vectors: for test cut on the CNC, one can directly create profiles for cut
Edit vectors : It is used to modify the curves, the bottom part of the section is for joining curves, suppose curves are not joined, it will join the curves if a curve is not joined machine will cut that line and arc as an individual curve and it may cause problems.
Align objects : it will align objects
Layers : It can help to orient the design files and separate two types of different operations.
Import files to partworks
Toolpaths
Click on the Toolpath on the side to generate toolpath.
Select tool
I used a 3 mm endmill milling bit for cutting.
Pass Depth : Pass depth determines how many phases you want to cut the material.
If I Put directly 12 mm here, it will go straight 12 mm down. it is not advisable because the tool will face very high forces than, so I decided to give 3 mm passes. each time tool will go 3 mm down after completing one cutting cycle and my material will be cut in 4 phases (12/3).
Spindle speed: it determines the RPM of the Spindle.
Feed rate: it determines the Feeding Force applied to the material.
Plunge Rate: Plunge rate is the speed at which the router bit is driven down into the material when starting a cut. if is too High it will break the tool or make a crack on the surface of the material.

SAVE toolpath
I SAVE THIS FILE ON Shopbot (Inch) format.
On Shopbot software - spindle routine
After generating the Toolpath now its time for cutting operation. After opening the SHopbot it is good practice to level up the machine for a while and Run the Spindle worm up command. it will Re-circulate
the oil
on the Spindle assembly.
Then Import Tool path file.
Keypad
On the Control box, there is a Keypad box which can be used to move the spindle in 3 axis to set up origin. After setting up the origin click the zero axis button to make that point origin.
Emergency Switch
Setting up Milling Bit
Setting up the 3 mm bit on the Spindle. First Chuck is fixed on collet then collet is mounted on the spindle. After that bit is inserted on the chuck and tightened.
Cutting
Post processing
So accidentally I gave Tabs on teeth profile, and in some gear cut depth was not enough so I have to do some post process.
fixing Bearings
Now it was time to check the inner diameter again, and it was perfect Bearing fit perfectly
Axle
Assembley
Before going for outer ring gear I want to check manually if I Need to give more clearance to teeth or not, I had to take many iterations in the Laser prototype that's why I wanted to be sure. for that tab error, I cut more 3 gear so I can have better motion.
Ring Gear making
After checking that tolerance is good enough I went for cut ring gears and frames.
Toolpath making procedure is the same but this time I tried a 6 mm drilling bit. I want to try it for increasing cutting speed.
Feed rate : 1.5 inch / s
RPM: 14000 rpmAnd I messed up!
2 flute spiral bit
I thought this is because of speed so I reduced it but no help from that, I think the tool diameter is too much for the teeth profile and that's what it burning the sheet by slowing down at edges. Then I tried 2 flute spiral bit
3 mm
bit.
After that, I reduce the feed rate to 4.5 inch /sec and it was perfect!
Frames
These are my frames for ring gear which will hold the ring gear in assembly. I gave an I mm pocket in the inner diameter of the frame so planet gears can rotate freely.
Ready to assemble
Starting from Frames
I had different options in Fabrications
Could use Buiscuit joinery by making slots in frame
Use of glue for permanent fix
Use of Nails for Fast assembly and disassembly
Using biscuit type joinery: it would be good if I could use Biscuit type joinery and I intended to do that, but two frames should be concentric for that if not they will misalign and I will not able to fit my planetary assembly. I needed something which is good to change the joints position if frames can't align.
Using Glue: Glue would be a permanent solution, if I kept little bit misalignment it cants be fixable.
Use of nails: for my case, it was a solution, I could realign if there's some error in misalignment, it is easy to add and remove also. ao I choose nails.
Fixing secong Frame
Using araldite glue
Since friction force was not sufficient enough to move the sun gears, so I used Araldite glue.
FUll assembly
First try full assembly
Oops !!! Sun gear is not able to hold its place in a vertical position, it was my design fault I think, I should have to take care of back support in sun gears, I tried it on the Horizontal position Anyway.
Sub assembly working
I was very happy it was quite smooth but I don't know where it is h=giving problems! even the sub-assembly of planet gear and ring gear was quite smooth but when I integrate them it became too tight to rotate and sun gear can t handle that thrust for a long time. But it was rotating though, below is the video.
Full assembly Second try
But I enjoyed it from the start to the end! The end results were not as quiet as expected though but it helped me to develop some maker skills to use different tools and though how you can do things step by step! At this movement, Our
Two
instructers and the whole team were helping me to make this thing work for me! It was a very good experience, appreciated !
In computer cutting group work we as a group was going to try a different speed and feed rate on MDF and Plywood so we can have a conclusion in which speed and feed are giving better surface finish.
my role was to handle the machining process in group work, I and Samiul were trying different speeds and feed on the materials and checking cutting behaviors! Click here to redirect on the group Website.
As I mentioned above CNC week was amazing from start to end. it gave me a feeling of being a maker which was one of the main reasons I wanted to Do fab academy!
In CNC week I learned much more about laser cutting moving assembly, Partworks software, Shopbot and very much new to me how to assemble things. The last was not
perfect though. Still, a week was great!


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layout: archive
author_profile: true
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CI-0129: Artificial Intelligence
In this class we will discuss several topics of Artificial Intelligence, including search and path finding, logic, and an introduction to machine learning. Details
about the class can be found in the syllabus (**Updated** on 13/4/2020)


Power measurement: Time domain [dBm]: 3.00 Frequency domain [dBm]: 3.00 Error [%] = 3.58e-05
Published with MATLAB® R2018a


NAVY Shore Geospatial Energy Module
Integrated With Existing NAVY Capabilities
Integrated With Existing NAVY Capabilities
ArcGIS Server 10.1
Oracle 11g
ASP.NET (web services)
Apache Flex (front-end)
amCharts
Crystal Reports Runtime
Sphinx (Help Documentation)
4 week development sprints
2 week promotion sprints
Jira + Agile (Project Tracking)
Stash (Git)
Spiceworks (Help Tickets)
Slack (Internal Communication)
50,000 facilities tracked monthly since 2005
(50,000 facilities x 12 months) x 10 years = 6 Million Records Analyzed Monthly
Oh, That's All?
The data is compiled monthly from 5 disparate business systems througout the Navy. We receive exports of the source data in various formats like .txt, .xls, .csv, and .html
iNFADS | 500k : Monthly Real Property
(Who occupies, who pays the bill, category codes)
CIRCUITS | 1.5mil : Monthly Commodity Usage
(mbtu's - electricity, steam, water, gas, & fuel)
DUERS | 15k : Quarterly Energy Reporting
(Measures progress toward Sec. of Navy Goals)
GOALS | 35k: Semi-Annual Benchmark Establishment (Highlights areas for improvement)
CIP | 1.5mil : Monthly GIS (Common Installation Picture Boundaries and Building Footprints)
We get daily temperature information for over 400 sites in the US. We calculate historic averages and degree days to help managers plan for changes in consumption.
How do we effectively communicate all of this data to our users?
Commanding Officers
Energy Managers
Building Managers
Stakeholders
Navy Civilians & Contractors
Over 30 different interactive charts display pre-defined analysis of consumption filtered from a single facility to the entire Navy


Just from knowing about the concept of Neuroplasticity and how our brain works is enough to change people’s outlook on the brain and intelligence. It has helped students do better in school and help people recover from mental/physical ailments.
Knowing that my brain is malleable and can improve through practice can be quite beneficial.
Practice whenever possible, put information into my own words if possible and reminding myself that the brain is malleable and not predetermined.
A growth mindset is having an understanding that it is possible to overcome obstacles when learning a new skill by having persistence and determination. It is relevant to learning as it is more beneficial to learning compared to a fixed mindset where fixed mindsets can influence our development of skills and learning in a bad way.
The fact that it is possible to improve/learn better simply by shifting your mindset is quite amazing to me. It has changed my outlook on learning and wish to implement it more in my everyday life.
I can integrate growth mindset by reminding myself each day that I am here to learn along with others doing the same task. I will also ask others for help if I’m stuck in something too.
Neuroplasticity works by having brain neural networks connect and fire together, by practicing tasks/material often and rewriting information into words I can understand they can become more thick and hardy thus allowing information to be remembered. Growth Mindset is having a mentality dedicated to learning. Being resilient in the face of obstacles with determination. Using words like “not yet” rather than “I can’t” is a method to keep a Growth Mindset. I’ve implemented these 2 concepts at the start of Bootcamp and have helped very much at keeping me going even when things became difficult.


The following is a list of compile dependencies for this project. These dependencies are required to compile and run the application:
| GroupId | ArtifactId | Version | Type | License |
|---|---|---|---|---|
| org.apache.ant | ant | 1.9.0 | jar | The Apache Software License, Version 2.0 |
The following is a list of runtime dependencies for this project. These dependencies are required to run the application:
| GroupId | ArtifactId | Version | Type | License |
|---|---|---|---|---|
| com.typesafe.sbt | sbt-launcher | 0.13.6 | jar | BSD-style |
The following is a list of provided dependencies for this project. These dependencies are required to compile the application, but should be provided by default when using the library:
| GroupId | ArtifactId | Version | Type | License |
|---|---|---|---|---|
| org.apache.maven | maven-plugin-api | 2.2.1 | jar | The Apache Software License, Version 2.0 |
| org.apache.maven.plugin-tools | maven-plugin-annotations | 3.3 | jar | Apache License, Version 2.0 |
The following is a list of transitive dependencies for this project. Transitive dependencies are the dependencies of the project dependencies.
The following is a list of compile dependencies for this project. These dependencies are required to compile and run the application:
| GroupId | ArtifactId | Version | Type | License |
|---|---|---|---|---|
| org.apache.ant | ant-launcher | 1.9.0 | jar | The Apache Software License, Version 2.0 |
The following is a list of provided dependencies for this project. These dependencies are required to compile the application, but should be provided by default when using the library:
| GroupId | ArtifactId | Version | Type | License |
|---|---|---|---|---|
| org.apache.maven | maven-artifact | 3.0 | jar | The Apache Software License, Version 2.0 |
| org.codehaus.plexus | plexus-utils | 2.0.4 | jar | The Apache Software License, Version 2.0 |
BSD-style: sbt-launcher
Apache License, Version 2.0: Maven Plugin Tools Java 5 Annotations
The Apache Software License, Version 2.0: Apache Ant Core, Apache Ant Launcher, Maven Artifact, Maven Plugin API, Plexus Common Utilities, SBT Runner Maven Plugin
| Filename | Size | Entries | Classes | Packages | JDK Rev | Debug |
|---|---|---|---|---|---|---|
| sbt-launcher-0.13.6.jar | 1.16 MB | 1,146 | 1,121 | 62 | 1.6 | debug |
| ant-1.9.0.jar | 1.92 MB | 1,195 | 1,116 | 60 | 1.5 | debug |
| ant-launcher-1.9.0.jar | 18.06 kB | 14 | 5 | 1 | 1.5 | debug |
| maven-artifact-3.0.jar | 50.69 kB | 57 | 32 | 11 | 1.5 | debug |
| maven-plugin-api-2.2.1.jar | 12.08 kB | 23 | 8 | 2 | 1.5 | debug |
| maven-plugin-annotations-3.3.jar | 13.71 kB | 22 | 7 | 1 | 1.5 | debug |
| plexus-utils-2.0.4.jar | 216.93 kB | 119 | 94 | 9 | 1.3 | debug |
| Total | Size | Entries | Classes | Packages | JDK Rev | Debug |
| 7 | 3.38 MB | 2,576 | 2,383 | 146 | 1.6 | 7 |
| compile: 2 | compile: 1.93 MB | compile: 1,209 | compile: 1,121 | compile: 61 | - | compile: 2 |
| runtime: 1 | runtime: 1.16 MB | runtime: 1,146 | runtime: 1,121 | runtime: 62 | - | runtime: 1 |
| provided: 4 | provided: 293.42 kB | provided: 221 | provided: 141 | provided: 23 | - | provided: 4 |
| Repo ID | URL | Release | Snapshot |
|---|---|---|---|
| apache.snapshots | http://repository.apache.org/snapshots | - | Yes |
| sonatype-nexus-snapshots | https://oss.sonatype.org/content/repositories/snapshots | - | Yes |
| central | https://repo.maven.apache.org/maven2 | Yes | - |
Repository locations for each of the Dependencies.


Welcome to LAMP STACK
Created a custom image from PHP base with apache installed.
Pages (HTML)
Style Sheets (CSS)
Computer Code (JavaScript)
Live Data (Files and Databases)


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I’m back in full book-writing mode, now working with Mugunth Kumar, who is brilliant. Go check out his stuff. Hopefully we’ll have something published and in all your hands by the end of the year. The book has taken up most of my writing time, so the blog will continue to be a bit quiet, but sometimes I like to answer a Stackoverflow question a bit more fully than I can there.
Today’s question is about laying out text without CTFramesetter
. We’re going to take a whirlwind tour through some CoreText code to demonstrate this. It’s not quite what the OP was asking about, but it shows some techniques and I had it handy. I’ll be writing a whole chapter on Core Text soon.
The goal of this project was to make “pinch” view. It lays out text in a view, and where ever you touch, the text is pinched towards that point. It’s not meant to be really useful. Everything is done in drawRect:
, which is ok in this case, since we only draw when we’re dirty, and when we’re dirty we have to redraw everything anyway. But in many cases, you’d want to do these calculations elsewhere, and only do final drawing in drawRect:
.
We start with some basic view layout, and loop until we run out of text or run out of vertical space in the view.
- (void)drawRect:(CGRect)rect {
[... Basic view setup and drawing the border ...]
// Work out the geometry
CGRect insetBounds = CGRectInset([self bounds], 40.0, 40.0);
CGPoint textPosition = CGPointMake(floor(CGRectGetMinX(insetBounds)),
floor(CGRectGetMaxY(insetBounds)));
CGFloat boundsWidth = CGRectGetWidth(insetBounds);
// Calculate the lines
CFIndex start = 0;
NSUInteger length = CFAttributedStringGetLength(attributedString);
while (start < length && textPosition.y > insetBounds.origin.y)
{
Now we ask the typesetter to break off a line for us.
CTTypesetterRef typesetter = self.typesetter;
CFIndex count = CTTypesetterSuggestLineBreak(typesetter, start, boundsWidth);
CTLineRef line = CTTypesetterCreateLine(typesetter, CFRangeMake(start, count));
And decide whether to full-justify it or not based on whether it’s at least 85% of a line:
CGFloat ascent;
CGFloat descent;
CGFloat leading;
double lineWidth = CTLineGetTypographicBounds(line, &ascent, &descent, &leading);
// Full-justify if the text isn't too short.
if ((lineWidth / boundsWidth) > 0.85)
{
CTLineRef justifiedLine = CTLineCreateJustifiedLine(line, 1.0, boundsWidth);
CFRelease(line);
line = justifiedLine;
}
Now we start pulling off one CTRun
at a time. A run is a series of glyphs within a line that share the same formatting. In our case, we should generally just have one run per line. This is a good point to explain the difference between a glyph and character. A character represents a unit of information. A glyph represents a unit of drawing. In the vast majority of cases in English, these two are identical, but there a few exceptions even in English called ligatures. The most famous is “fi” which in some fonts is drawn as a single glyph. Open TextEdit. Choose Lucida Grande 36 point font. Type “fi” and see for yourself how it’s drawn. Compare it to “ft” if you think it’s just drawing the “f” too wide. The joining is on purpose.
So the thing to keep in mind is that there can be a different number of glyphs than characters. High-level Core Text objects work in characters. Low-level objects work in glyphs. There are functions to convert character indexes into glyph indexes and vice versa. So, let’s back to the code. We’re going to move the Core Graphics text pointer and start looping through our CTRun
objects:
// Move us forward to the baseline
textPosition.y -= ceil(ascent);
CGContextSetTextPosition(context, textPosition.x, textPosition.y);
// Get the CTRun list
CFArrayRef glyphRuns = CTLineGetGlyphRuns(line);
CFIndex runCount = CFArrayGetCount(glyphRuns);
// Saving for later in case we need to use the actual transform. It's faster
// to just add the translate (see below).
// CGAffineTransform textTransform = CGContextGetTextMatrix(context);
// CGAffineTransform inverseTextTransform = CGAffineTransformInvert(textTransform);
for (CFIndex runIndex = 0; runIndex < runCount; ++runIndex)
{
Now we have our run, and we’re going to work out the font so we can draw it. By definition, the entire run will have the same font and other attributes. Note that the code only handles font changes. It won’t handle decorations like underline (remember: bold is a font, underline is a decoration). You’d need to add more code if you wanted that.
CTRunRef run = CFArrayGetValueAtIndex(glyphRuns, runIndex);
CTFontRef runFont = CFDictionaryGetValue(CTRunGetAttributes(run),
kCTFontAttributeName);
// FIXME: We could optimize this by caching fonts we know we use.
CGFontRef cgFont = CTFontCopyGraphicsFont(runFont, NULL);
CGContextSetFont(context, cgFont);
CGContextSetFontSize(context, CTFontGetSize(runFont));
CFRelease(cgFont);
Now we’re going to pull out all the glyphs so we can lay them out one at a time. CTRun
has one of those annoying Get...Ptr
constructs that are common in Core frameworks. CTRunGetPositionsPtr()
will very quickly return you the internal pointer to the glyphs locations. But it might fail if the CTRun
hasn’t calculating them yet. If that happens, then you have to call CTRunGetPositions()
and hand it a buffer to copy into. To handle this, I keep around a buffer that I realloc()
to the largest size I need. This almost never comes up because CTRunGetPositionsPtr()
almost always returns a result.
Note the comment about being “slightly dangerous.” I’m grabbing the internal location data structures and modifying them. This works out because we are the only user of this CTRun
, but these are really immutable structures. If two CTRun
objects are created from the same data, then Apple is free to return us two pointers to the same object. So it’s within the specs that we’re actually modifying data that some other part of the program is using for a different layout. That’s pretty unlikely, but it’s worth keeping in mind. My early tests of this on a first-generation iPad suggested that this optimization was noticeable in Instruments. On the other hand, I hadn’t applied some other optimizations yet (like reusing positionsBuffer
), so it may be practical to get better safety and performance here. I’ll have to profile further.
CFIndex glyphCount = CTRunGetGlyphCount(run);
// This is slightly dangerous. We're getting a pointer to the internal
// data, and yes, we're modifying it. But it avoids copying the memory
// in most cases, which can get expensive.
CGPoint *positions = (CGPoint*)CTRunGetPositionsPtr(run);
if (positions == NULL)
{
size_t positionsBufferSize = sizeof(CGPoint) * glyphCount;
if (malloc_size(positionsBuffer) < positionsBufferSize)
{
positionsBuffer = realloc(positionsBuffer, positionsBufferSize);
}
CTRunGetPositions(run, kRangeZero, positionsBuffer);
positions = positionsBuffer;
}
// This one is less dangerous since we don't modify it, and we keep the const
// to remind ourselves that it's not to be modified lightly.
const CGGlyph *glyphs = CTRunGetGlyphsPtr(run);
if (glyphs == NULL)
{
size_t glyphsBufferSize = sizeof(CGGlyph) * glyphCount;
if (malloc_size(glyphsBuffer) < glyphsBufferSize)
{
glyphsBuffer = realloc(glyphsBuffer, glyphsBufferSize);
}
CTRunGetGlyphs(run, kRangeZero, (CGGlyph*)glyphs);
glyphs = glyphsBuffer;
}
Now we move around the characters with a little trig. I originally coded this using CGAffineTransforms
, but doing the math by hand turned out to be much faster.
// Squeeze the text towards the touch-point
if (touchIsActive)
{
for (CFIndex glyphIndex = 0; glyphIndex < glyphCount; ++glyphIndex)
{
// Text space -> user space
// Saving the transform in case we ever want it, but just applying
// the translation by hand is faster.
// CGPoint viewPosition = CGPointApplyAffineTransform(positions[glyphIndex], textTransform);
CGPoint viewPosition = positions[glyphIndex];
viewPosition.x += textPosition.x;
viewPosition.y += textPosition.y;
CGFloat r = sqrtf(hypotf(viewPosition.x - touchPoint.x,
viewPosition.y - touchPoint.y)) / 4;
CGFloat theta = atan2f(viewPosition.y - touchPoint.y,
viewPosition.x - touchPoint.x);
CGFloat g = 10;
viewPosition.x -= floorf(cosf(theta) * r * g);
viewPosition.y -= floor(sinf(theta) * r * g);
// User space -> text space
// Note that this is modifying an internal data structure of the CTRun.
// positions[glyphIndex] = CGPointApplyAffineTransform(viewPosition, inverseTextTransform);
viewPosition.x -= textPosition.x;
viewPosition.y -= textPosition.y;
positions[glyphIndex] = viewPosition;
}
}
Finally, finally, we draw the glyphs and move down a line. We move down by adding the previous-calculated descent, leading and then +1. The “+1” was added because it matches up with how CTFramesetter lays out. Otherwise the descenders of one line exactly touch the ascenders of the next line.
CGContextShowGlyphsAtPositions(context, glyphs, positions, glyphCount);
}
// Move the index beyond the line break.
start += count;
textPosition.y -= ceilf(descent + leading + 1); // +1 matches best to CTFramesetter's behavior
CFRelease(line);
}
free(positionsBuffer);
free(glyphsBuffer);
}
So there you have it. It’s a whirlwind tour showing how to lay glyphs out one-by-one. Attached is an example project showing it in real life.


Detected best pool shot:
Detection result:
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Remark
Note that this work currently assumes the entire pool table is in the image.
Upload another photo


PhenologyMMS 1.4 is a software program designed to simulate the phenological development of certain crops. Phenology is the sequence or timing of developmental stages or events and is essential to understanding crop development and growth . Many users and farmers in particular need this information as many management decisions are based on the growth stage of the crop. This helps to enhance economic crop yields and at the same time maintain environmental quality. For example, as water for agriculture becomes increasingly more limited it will be critical to know the developmental stage the crop is at so the grower knows when the best times are to apply water. Simulation models and decision support tools also benefit by having crop simulation models which predict the timing of growth stages .
Plant development is orderly and predictable, (Rickman and Klepper, 1995; McMaster, 2005) and the plant’s genetics determines the sequence of the growth stage events (Distelfeld et al., 2009; Moragues and McMaster, 2012). Environmental conditions also influence the plant’s development rate and includes such things as temperature, water availability, nutrients, photoperiod , etc. (White et al., 2008). Temperature has been used most frequently to predict the timing of developmental events and often uses some measurement of thermal time . Another very important influence on crop development is water availability, however many models do not include this impact on development. “Confounding the problem of variable phenological responses to water deficits is that for most crops the complete developmental sequence of the shoot apex has not been completely summarized and quantified or correlated with readily observable developmental stages.”(McMaster et al., 2013).
PhenologyMMS 1.4 employs temperature as thermal time and water stress to predict the development of the crop and the timing of phenological growth stages.
Install PhenologyMMS 1.4 to begin using the model.
Links to: Install PhenologyMMS 1.4


RT @zoevkay: @1337807 Code in space!! This is the person I chose as mentor...unsure if I made the best or worst choice #rubyonales http://t…
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Welcome to the Google Code-In Blog Planet
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Recent news: Mr. Roboto
Summary:
- The prototype arm is FINISHED
- We'll be working on machining parts for the chassis in the lab on Thursday and Friday from 12:30pm-5:00pm and 2:00pm-5:00pm respectively.
- The final Autumn quarter arm meeting is this Friday at the same place and same time (5:00pm in MEB 238). We'll be focusing on the hand and scientific stations.
About us
DUBotics is a multi-disciplinary engineering group that draws students from the University of Washington to participate in constructing robots for several international competitions. Most recently, the team has been participating in the University Rover Challenge and has to date competed in one year of the competition, submitting our first entry: The Cerberus Rover.
The team is divided into different subgroups that have work delegated to them by their individual group leaders, all of which are overseen by the team leaders. Currently, anyone regardless of major or intended major is open to join the team as most of the skills needed to participate can be learned on site.


Methods with too many statements may be confusing and are a good sign that refactoring is necessary.
The following statements are not counted:
for
loop initialization statements, that is, int i = ...
within a for(int i = ...;...)
statementfor
loop update statements, that is, i += 2
within a for(int i = ...;...; i += 2)
statementUse the Maximum statements per method field to specify the maximum allowed number of statements in a method.


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| Item Name | Current Price | Future Price |
|---|---|---|
| Green Bean | $0.79 | - |
| Corn | $1.50 | $1.20 |
| Bread | $1.25 | $0.75 |
| Thyme | $1.25 | $0.75 |
| Cream | $1.25 | $0.75 |
| Pickle | $1.25 | $0.75 |
| Bread Butter | $1.25 | $0.75 |
| Bread Loaf | $1.25 | $0.75 |
| Bread Big | $1.25 | $0.75 |
| Bread Small | $1.25 | $0.75 |
| UPC # | Item Name | Projected Units |
% Lift |
|---|---|---|---|
| 1432 | Big Bread | 400 | 20.0% |
| 3532 | Little Bread | 354 | 15.0% |
| 9343 | Giant Bread | 343 | 20.0% |
| UPC # | Item Name | Projected Units |
% Lift |
|---|---|---|---|
| 1432 | Grape Jam | 400 | 12.5% |
| 3532 | Cherry Jam | 354 | 14.5% |
| 9343 | Blueberry Jam | 343 | 11.0% |


PhD Courses
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{{ phd_courses.0.computation_chemistry|safe }}
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{% extends "layout.html" %} {% block content %}
Earlier this year, several of us from the DC2 community (Harlan Harris, Marck Vaisman, and Sean Murphy) conducted a web-based survey of Data Scientists, with the goal of better understanding the varieties of people, skills, and experiences that fall under this rather broad buzzword. We have analyzed the results from over 250 respondents, and are excited to share some initial findings here!
The first task in the survey was to rank a set of 21 skill categories. We used the technique of non-negative matrix factorization to find five underlying dimensions of variation among the rankings. We found that Data Scientists have skills that tend to be associated together, and by grouping those skills, we can provide people with a useful shorthand. Here are the skills groups, with category names that we think clarify what we as Data Scientists bring to the table:
Clearly not everyone who is strong in some aspects of these categories will be expert in every area. But, as a general rule, these skill groups co-occur. Equally important, a Data Scientist who may have skills in Machine Learning and Big Data may have little expertise in Surveys or Front-End Programming.
We performed a similar NMF analysis on a series of self-evaluation questions near the end of the survey. Respondents gave “Completely Agree” to “Completely Disagree” responses to statements that started with “I think of myself as a(n)…” We view the Self-Identification groups that fell out of the NMF analysis as being critical to clarifying the diverse backgrounds and interests of Data Scientists. Here are how the responses to these questions grouped, along with category names that we feel are useful:
Many people responded to many of these self-ID questions positively, but the analysis shows underlying dimensions of variation that can inform peoples’ career paths and interests. Even more fascinating, the two groupings we identified, skills and self-ID, correlate in ways that we think are highly valuable to Data Scientists and organizations that need our skills. The below graph shows how survey participants, labeled by their primary (by strongest factor loading) skill group and their primary self-ID group, arrange themselves in a cross-tabulation table (click to see larger).
As we further dive into these results, we will be stressing the point that our data shows substantial variation in skills and interests among Data Scientists. The field is quite diverse, and a Data Creative who can build an amazing Javascript tool to visualize data from a set of disparate sources may be very different from a Data Businessperson who starts a data-related business or a Data Researcher who uses advanced mathematical tools to bring insight to organizations or a Data Engineer who integrates enterprise databases with predictive or optimization systems.
If you want even more information, check out Harlan's presentation at Data Gotham, available via YouTube. If you have any specific questions that we might be able to answer as we further explore the data, please email us!
harlan [@] datacommunitydc.orgHarlan D. Harris is a Senior Data Scientist at Kaplan Test Prep, the Co-Founder and Co-Organizer of the Data Science DC Meetup, and the Co-Founder and President of Data Community DC, Inc. He has a PhD in Computer Science (Machine Learning) from the University of Illinois at Urbana-Champaign and worked as a researcher in several Psychology departments before turning to industry.
Marck Vaisman is the Principal Data Scientist at DataXtract, LLC where he helps clients ranging from startups to Fortune 500 firms with all kinds of data science projects. His professional experience spans the management consulting, telecommunications, Internet, and technology industries. He is the co-founder of Data Community DC, an organization focused on building the Washington DC area data community and promoting data and statistical sciences by running meetup and other events. He has an MBA from Vanderbilt University and a B.S. in Mechanical Engineering from Boston University.
Sean Patrick Murphy, with degrees in mathematics, electrical engineering, and biomedical engineering and an MBA from Oxford University, has served as a senior scientist at the Johns Hopkins Applied Physics Laboratory for the past ten years. Previously, he served as the Chief Data Scientist at WiserTogether, a series A funded health care analytics firm, and the Director of Research at Manhattan Prep, a boutique graduate educational company. He was also the co-founder and CEO of a big data-focused startup: CloudSpree.


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Ramaphosa roasted after ‘tone-deaf’ Eskom letter
The president visited Medupi for the first time, calling it a ‘fitting symbol of the importance of our state-owned enterprises’.
by Daniel FriedmanPresident Cyril Ramaphosa, 22 August 2019. Picture: Gallo Images
This week’s edition of President Cyril Ramaphosa’s weekly letters to the nation, “From the Desk of the President”, has left a bitter taste in the mouth of many, based on the reactions on social media.
In the letter, Ramaphosa calls power station Medupi “a fitting symbol of the importance of our state-owned enterprises”.
“Despite the depth of current challenges, none of our SOEs is lost. They can all be saved. But it will take extraordinary effort and, in some cases, tough decisions,” the president writes.
Harsh criticism online came from people including journalists Ferial Haffajee, Ray Mahlaka, and Erin Bates, political analyst Daniel Silke, and activist Zackie Achmat.
Both Mahlaka and Bates described the president’s letter as “tone-deaf”.
“The number one citizen gloating about a serially late and budget-blowing Medupi Power Station. Gloating about a looting scheme,” Mahlaka tweeted.
“No mention of how his administration plans to yank the country out of darkness in the interim. So tone-deaf [and] out of touch with reality,” he added.
As part of a long thread, Bates responded to the president calling Medupi a fitting symbol of SA state-owned enterprises.
“Medupi is, in another argument, a ‘fitting symbol’ of poor governance and mega-projects.
“Construction began 12 years ago, the plant is still incomplete and earlier this year, [Eskom’s] Jabu Mabuza said the final cost is anticipated to be R18 billion”.
Later in the thread, she asks: “Was the desk of the president well-lit while he was writing? Meanwhile [load shedding] is ongoing and doesn’t get so much as a mention.”
According to Haffajee: “Medupi is a ‘fitting symbol’ Fo sho. Late. Expensive. Strike prone. Effed up.”
“We want to know what is wrong with [Eskom] now and how it will be fixed Mr President,” tweeted Achmat.
“You don’t need to worry about the delivery of most expensive useless and corrupt present. Father Christmas will place under a tree. He will bring Medupi one day.”
Silke, meanwhile, reacted to Ramaphosa saying in the letter that he was struck by Medupi’s “massive size”.
“What would strike one about [Medupi] is precisely how massive it is – a massively over-budget, non-performing installation massively damaging the [SA economy] – that’s how massive it is,” he tweeted.
Several Twitter users also reacted to Ramaphosa saying it was his first visit to Medupi, questioning why he hadn’t visited before as deputy president, president, or as the person appointed by former president Jacob Zuma to oversee the turnaround of three state-owned enterprises, including Eskom, in 2014.
Read the president’s letter here.