Week 7: Authoring Websites, Considering Audience
Note that there are a few changes for this week: (1) No additional readings; see in-class announcements for how to handle instigators this week (2) We're going to circle back around to coding/writing A2, since Laura has extended that due date to 10/20.
Readings
- No additional readings, though we will revisit some of the ideas from week 4:
Week 8: Case Study, Data at CSU; Locative Media
This week we'll explore some of the hidden audiences of our content through looking first at locative media, then a case study of how your online data is used at CSU.
Readings
- Amidon, et. al's Copyright, Content, and Control (You need not read this entire site -- instead, we'll divide and conquer with group assignments that we determined in class in week 7)
- Consult this page for reading group assignments
- Your Apps Know Where You Were Last Night, and They’re Not Keeping It Secret and the follow up article Uncovering What Your Phone Knows, both from the NYTimes.
Week 9: Futurology
This week, we'll speculate about the future: both for future assignments in this course (Assignments 3 & 4) and for the ways in which emerging technologies will affect composition in digital environments.
Readings
- Re-vist: Amidon, et. al's Copyright, Content, and Control
- Group readings from our in-class activity:Group Discussion's Short Readings on Futurology
- Also read the assignment sheets for A3 & A4 (linked above under the "Assignments" tab)
Week 10: Going Viral
This week we'll continue our conversations about how ideas circulate online by looking at Viral Content.
Readings
- DeVoss and Ridolfo “Composing for Recomposition: Rhetorical Velocity & Delivery”
- Gries “Mapping Obama Hope”
- Getting Likes, Going Viral [PDF see Canvas]
- (Review/Skim) Cotter “Playing the Visibility Game” [PDF see Canvas]
Week 11 Conferences
We will not meet in class during week 11; instead, you'll sign up for a conference to discuss your plans for A3/A4. If you plan to work with a partner, be sure to sign up for a time when you can both meet together with me. Pay attention to the conference location, as some TTh conferences do not meet in my usual office.
Keep in mind that A3 is due on Sunday, November 10th. Use the extra time this week to work towards completing this major assignment. Protip: a good portion of your conference preparation can be used in your A3 -- self-plagiarize at will! :) Don't hesitate to reach out with any questions.
- Sign Up Sheet for Conference Times
- Complete Conference Preparation (50 pts) and submit before your scheduled conference time.
- If you need to change your conference time, or if there are no remaining slots that fit your schedule get in touch ASAP; I may be able to work something out, but cannot guarantee it as we're working with many folks' logistics and schedules.
Readings & Resources
- Assignment Sheet for A3
- Assignment Sheet for A4
- Examples of Long Form Texts
- MLA Style Guide for Annotations
Week 12: Synthesizing Evidence for A4
Note that Assignment 3 (Research Proposal & Annotated bib) is due on Wednesday 11/13 by midnight. Your main goal for this week is to continue your research & planning for A3/A4.
Instigators for this week might focus on a few areas areas:
- Option: A look back at the examples or readings so far -- what connections or themes have emerged for your across the readings and ideas we've been exploring in class so far? What's a week that you perhaps missed creating an instigator for, that you'd like to go back to?
- Option: Use the Examples of Long Form Texts to discuss what you're seeing as commonalities across this genre.


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This tutorial is for Processing's Python Mode. If you see any errors or have comments, please let us know. This tutorial is adapted from the book, Learning Processing, by Daniel Shiffman, published by Morgan Kaufmann Publishers, Copyright © 2008 Elsevier Inc. All rights reserved.
A digital image is nothing more than data -- numbers indicating variations of red, green, and blue at a particular location on a grid of pixels. Most of the time, we view these pixels as miniature rectangles sandwiched together on a computer screen. With a little creative thinking and some lower level manipulation of pixels with code, however, we can display that information in a myriad of ways. This tutorial is dedicated to breaking out of simple shape drawing in Processing and using images (and their pixels) as the building blocks of Processing graphics. Getting started with images.
Hopefully, you are comfortable with the idea of data types. You probably specify them often -- a float variable "speed", an int "x", etc. These are all primitive data types, bits sitting in the computer's memory ready for our use. Though perhaps a bit trickier, you hopefully also use objects, complex data types that store multiple pieces of data (along with functionality) -- a "Ball" class, for example, might include floating point variables for location, size, and speed as well as methods to move, display itself, and so on.
def setup(): global img size(320,240) # Make a new instance of a PImage by loading an image file # Declaring a variable of type PImage img = loadImage("mysummervacation.jpg") def draw(): global img background(0); # Draw the image to the screen at coordinate (0,0) image(img,0,0)
Using an instance of a PImage object is no different than using a user-defined class.
We declare a variable img and assign a newly created instance of the PImage class to it by calling the . loadImage() takes one argument, a String indicating a file name, and loads the that file into memory. loadImage() looks for image files stored in your Processing sketch's "data" folder.
In the above example, it may seem a bit peculiar that we never called a "constructor" to instantiate the PImage object, saying "PImage()". After all, in most object-related examples, a constructor is a must for producing an object instance. mySpaceship = Spaceship(); myFlower = Flower(25);
img = loadImage("file.jpg");
In fact, the loadImage() function performs the work of a constructor, returning a brand new instance of a PImage object generated from the specified filename. We can think of it as the PImage constructor for loading images from a file. For creating a blank image, the createImage() function is used.
# Create a blank image, 200x200 pixels with RGB color img = createImage(200,200,RGB)
image(img,10,20,90,60) Your very first image processing filter
When displaying an image, you might like to alter its appearance. Perhaps you would like the image to appear darker, transparent, blue-ish, etc. This type of simple image filtering is achieved with Processing's tint() function. tint() is essentially the image equivalent of shape's fill(), setting the color and alpha transparency for displaying an image on screen. An image, nevertheless, is not usually all one color. The arguments for tint() simply specify how much of a given color to use for every pixel of that image, as well as how transparent those pixels should appear.
sunflower = loadImage("sunflower.jpg") dog = loadImage("dog.jpg") background(dog)
# The image retains its original state. tint(255) image(sunflower,0,0) # The image appears darker. tint(100) image(sunflower,0,0)
# The image is at 50% opacity. tint(255,127) image(sunflower,0,0)
# None of its red, most of its green, and all of its blue. tint(0,200,255) image(sunflower,0,0)
# The image is tinted red and transparent. tint(255,0,0,100) image(sunflower,0,0) Pixels, pixels, and more pixels
If you've just begun using Processing you may have mistakenly thought that the only offered means for drawing to the screen is through a function call. "Draw a line between these points" or "Fill an ellipse with red" or "load this JPG image and place it on the screen here." But somewhere, somehow, someone had to write code that translates these function calls into setting the individual pixels on the screen to reflect the requested shape. A line doesn't appear because we say line(), it appears because we color all the pixels along a linear path between two points. Fortunately, we don't have to manage this lower-level-pixel-setting on a day-to-day basis. We have the developers of Processing (and Java) to thank for the many drawing functions that take care of this business.
def setup(): size(200, 200) # Before we deal with pixels loadPixels() changePixels() def changePixels(): # Loop through every pixel for i in xrange(len(pixels)): # Pick a random number, 0 to 255 rand = random(255) # Create a grayscale color based on random number c = color(rand) # Set pixel at that location to random color pixels[i] = c # When we are finished dealing with pixels updatePixels()
In the above example, because the colors are set randomly, we didn't have to worry about where the pixels are onscreen as we access them, since we are simply setting all the pixels with no regard to their relative location. However, in many image processing applications, the XY location of the pixels themselves is crucial information. A simple example of this might be, set every even column of pixels to white and every odd to black. How could you do this with a one dimensional pixel array? How do you know what column or row any given pixel is in?
Example: Setting Pixels according to their 2D location def setup(): size(200,200) loadPixels() changePixels() def changePixels(): # Loop through every pixel column for x in xrange(width): # Loop through every pixel row for y in xrange(height): # Use the formula to find the 1D location loc = x + y * width; if (x % 2 == 0): # If we are an even column pixels[loc] = color(255) else: # If we are an odd column pixels[loc] = color(0) updatePixels() Intro To Image Processing
The previous section looked at examples that set pixel values according to an arbitrary calculation. We will now look at how we might set pixels according those found in an existing PImage object. Here is some pseudo-code.
img = createImage(320,240,RGB) # Make a PImage object print(img.width) # Yields 320 print(img.height) # Yields 240 img.pixels[0] = color(255,0,0) # Sets the first pixel of the image to red
# Display a 200x200 pixel image, pixel by pixel. def setup(): global img size(200, 200) img = loadImage("sunflower.jpg") def draw(): loadPixels() # Since we are going to access the image's pixels too img.loadPixels() for y in xrange(height): for x in xrange(width): loc = x + y*width # The functions red(), green(), and blue() pull out the # 3 color components from a pixel. r = red(img.pixels[loc]) g = green(img.pixels[loc]) b = blue(img.pixels[loc]) # Image Processing would go here # If we were to change the RGB values, we would do it here, # before setting the pixel in the display window. # Set the display pixel to the image pixel pixels[loc] = color(r,g,b) updatePixels()
imageLoc = x + y*img.width displayLoc = x + y*width Our second image filter, making our own "tint"
Just a few paragraphs ago, we were enjoying a relaxing coding session, colorizing images and adding alpha transparency with the friendly tint()method. For basic filtering, this method did the trick. The pixel by pixel method, however, will allow us to develop custom algorithms for mathematically altering the colors of an image. Consider brightness -- brighter colors have higher values for their red, green, and blue components. It follows naturally that we can alter the brightness of an image by increasing or decreasing the color components of each pixel. In the next example, we dynamically increase or decrease those values based on the mouse's horizontal location. (Note, the next two examples include only the image processing loop itself, the rest of the code is assumed.)
for x in xrange(img.width): for y in xrange(img.height): # Calculate the 1D pixel location loc = x + y*img.width # Get the R,G,B values from image r = red(img.pixels[loc]) g = green(img.pixels[loc]) b = blue(img.pixels[loc]) # Change brightness according to the mouse here adjustBrightness = (float(mouseX) / width) * 8.0 r *= adjustBrightness g *= adjustBrightness b *= adjustBrightness # Constrain RGB to between 0-255 r = constrain(r,0,255) g = constrain(g,0,255) b = constrain(b,0,255) # Make a new color and set pixel in the window c = color(r,g,b) pixels[loc] = c
Example: Adjusting image brightness based on pixel location for x in xrange(img.width): for y in xrange(img.height): # Calculate the 1D pixel location loc = x + y*img.width # Get the R,G,B values from image r = red(img.pixels[loc]) g = green(img.pixels[loc]) b = blue(img.pixels[loc]) # Calculate an amount to change brightness # based on proximity to the mouse distance = dist(x,y,mouseX,mouseY) adjustBrightness = (50-distance)/50 r *= adjustBrightness g *= adjustBrightness b *= adjustBrightness # Constrain RGB to between 0-255 r = constrain(r,0,255) g = constrain(g,0,255) b = constrain(b,0,255) # Make a new color and set pixel in the window c = color(r,g,b) pixels[loc] = c Writing to another PImage object's pixels
All of our image processing examples have read every pixel from a source image and written a new pixel to the Processing window directly. However, it's often more convenient to write the new pixels to a destination image (that you then display using the image() function). We'll demonstrate this technique while looking at another simple pixel operation: threshold.
Example: Brightness Threshold def setup(): global source, destination size(200, 200) source = loadImage("sunflower.jpg") # The destination image is created as a blank image the same size as the source. destination = createImage(source.width, source.height, RGB) def draw(): threshold = 127 # We are going to look at both image's pixels source.loadPixels() destination.loadPixels() for x in xrange(source.width): for y in xrange(source.height): loc = x + y*source.width # Test the brightness against the threshold if (brightness(source.pixels[loc]) > threshold): destination.pixels[loc] = color(255) # White else: destination.pixels[loc] = color(0) # Black # We changed the pixels in destination destination.updatePixels() # Display the destination image(destination,0,0)
// Draw the image image(img,0,0) # Filter the window with a threshold effect # 0.5 means threshold is 50% brightness filter(THRESHOLD,0.5) Level II: Pixel Group Processing
In previous examples, we've seen a one-to-one relationship between source pixels and destination pixels. To increase an image's brightness, we take one pixel from the source image, increase the RGB values, and display one pixel in the output window. In order to perform more advanced image processing functions, we must move beyond the one-to-one pixel paradigm into pixel group processing.
loc = x + y*img.width pix = img.pixels[loc]
leftLoc = (x-1) + y*img.width leftPix = img.pixels[leftLoc]
diff = abs(brightness(pix) - brightness(leftPix)) pixels[loc] = color(diff)
# Since we are looking at left neighbors # We skip the first column for x in xrange(width): for y in xrange(height): # Pixel location and color loc = x + y*img.width pix = img.pixels[loc] # Pixel to the left location and color leftLoc = (x-1) + y*img.width leftPix = img.pixels[leftLoc] # New color is difference between pixel and left neighbor diff = abs(brightness(pix) - brightness(leftPix)) pixels[loc] = color(diff)
Sharpen: -1 -1 -1 -1 9 -1 -1 -1 -1 Blur: 1/9 1/9 1/9 1/9 1/9 1/9 1/9 1/9 1/9
w = 80 # It's possible to perform a convolution # the image with different matrices matrix = [ [ -1, -1, -1 ], [ -1, 9, -1 ], [ -1, -1, -1 ] ] def setup(): global img size(200, 200) frameRate(30) img = loadImage("sunflower.jpg") def draw(): # We're only going to process a portion of the image # so let's set the whole image as the background first image(img,0,0) # Where is the small rectangle we will process xstart = constrain(mouseX-w/2,0,img.width) ystart = constrain(mouseY-w/2,0,img.height) xend = constrain(mouseX+w/2,0,img.width) yend = constrain(mouseY+w/2,0,img.height) matrixsize = 3 loadPixels() # Begin our loop for every pixel for x in xrange(xstart,xend): for y in xrange(ystart,yend): # Each pixel location (x,y) gets passed into a function called convolution() # which returns a new color value to be displayed. c = convolution(x,y,matrix,matrixsize,img) loc = x + y*img.width pixels[loc] = c updatePixels() stroke(0) noFill() rect(xstart,ystart,w,w) def convolution(x, y, matrix, matrixsize, img): rtotal = 0.0 gtotal = 0.0 btotal = 0.0 offset = matrixsize / 2 # Loop through convolution matrix for i in xrange(matrixsize): for j in xrange(matrixsize): # What pixel are we testing xloc = x+i-offset yloc = y+j-offset loc = xloc + img.width*yloc # Make sure we have not walked off the edge of the pixel array loc = constrain(loc,0,len(img.pixels)-1) # Calculate the convolution # We sum all the neighboring pixels multiplied by the convolution matrix values. rtotal += (red(img.pixels[loc]) * matrix[i][j]) gtotal += (green(img.pixels[loc]) * matrix[i][j]) btotal += (blue(img.pixels[loc]) * matrix[i][j]) # Make sure RGB is within range rtotal = constrain(rtotal,0,255) gtotal = constrain(gtotal,0,255) btotal = constrain(btotal,0,255) # Return the resulting color return color(rtotal,gtotal,btotal) Visualizing the Image
You may be thinking: "Gosh, this is all very interesting, but seriously, when I want to blur an image or change its brightness, do I really need to write code?  Indeed, what we have achieved here is an merely an introductory understanding of what highly skilled programmers at Adobe do. The power of Processing, however, is the potential for real-time, interactive graphics applications. There is no need for us to live within the confines of "pixel point" and "pixel group" processing.
Example: "Pointillism" pointillize = 16 def setup(): global img size(200,200) img = loadImage("sunflower.jpg") background(0) smooth() def draw(): global img, pointillize # Pick a random point x = int(random(img.width)) y = int(random(img.height)) loc = x + y*img.width # Look up the RGB color in the source image loadPixels() r = red(img.pixels[loc]) g = green(img.pixels[loc]) b = blue(img.pixels[loc]) noStroke() # Draw an ellipse at that location with that color fill(r,g,b,100) ellipse(x,y,pointillize,pointillize)
Example: 2D image mapped to 3D cellsize = 2 # Dimensions of each cell in the grid def setup(): global img, cols, rows, cellsize size(200, 200, P3D) img = loadImage("sunflower.jpg") # Load the source image cols = width/cellsize # Calculate number of columns rows = height/cellsize # Calculate number of rows def draw(): global img, cols, rows, cellsize background(0) loadPixels() # Begin loop for columns for i in xrange(cols): # Begin loop for rows for j in range(rows): x = i*cellsize + cellsize/2 # x position y = j*cellsize + cellsize/2 # y position loc = x + y*width # Pixel array location c = img.pixels[loc] # Grab the color # Calculate a z position as a function of mouseX and pixel brightness z = (mouseX/(float(width))) * brightness(img.pixels[loc]) - 100.0 # Translate to the location, set fill and stroke, and draw the rect pushMatrix() translate(x,y,z) fill(c) noStroke() rectMode(CENTER) rect(0,0,cellsize,cellsize) popMatrix()
This tutorial is for Python Mode of Processing version 2+. If you see any errors or have comments, please let us know. This tutorial is from the book, Learning Processing, by Daniel Shiffman, published by Morgan Kaufmann Publishers, Copyright © 2008 Elsevier Inc. All rights reserved. |


I am Rithwik Kukunuri, a junior Computer Science undergraduate at IIT Gandhinagar, India. Since august 2018, I have been working as an undergraduate research student under Prof. Nipun Batra, Assistant Professor, IIT Gandhinagar.
I am interested in machine learning, deep learning and their applications. My dream is to use machine learning to make huge a impact on the world.


Mailboxes
An Akka Mailbox holds the messages that are destined for an Actor. Normally each Actor has its own mailbox, but with for example a BalancingPool all routees will share a single mailbox instance.
Mailbox Selection
Requiring a Message Queue Type for an Actor
It is possible to require a certain type of message queue for a certain type of actor by having that actor implement the parameterized interface RequiresMessageQueue. Here is an example:
import akka.dispatch.BoundedMessageQueueSemantics;
import akka.dispatch.RequiresMessageQueue;
public class MyBoundedUntypedActor extends MyUntypedActor
implements RequiresMessageQueue<BoundedMessageQueueSemantics> {
}
The type parameter to the RequiresMessageQueue interface needs to be mapped to a mailbox in configuration like this:
bounded-mailbox {
mailbox-type = "akka.dispatch.BoundedMailbox"
mailbox-capacity = 1000
mailbox-push-timeout-time = 10s
}
akka.actor.mailbox.requirements {
"akka.dispatch.BoundedMessageQueueSemantics" = bounded-mailbox
}
Now every time you create an actor of type MyBoundedUntypedActor it will try to get a bounded mailbox. If the actor has a different mailbox configured in deployment, either directly or via a dispatcher with a specified mailbox type, then that will override this mapping.
Note
The type of the queue in the mailbox created for an actor will be checked against the required type in the interface and if the queue doesn't implement the required type then actor creation will fail.
Requiring a Message Queue Type for a Dispatcher
A dispatcher may also have a requirement for the mailbox type used by the actors running on it. An example is the BalancingDispatcher which requires a message queue that is thread-safe for multiple concurrent consumers. Such a requirement is formulated within the dispatcher configuration section like this:
my-dispatcher {
mailbox-requirement = org.example.MyInterface
}
The given requirement names a class or interface which will then be ensured to be a supertype of the message queue’s implementation. In case of a conflict—e.g. if the actor requires a mailbox type which does not satisfy this requirement—then actor creation will fail.
How the Mailbox Type is Selected
When an actor is created, the ActorRefProvider first determines the dispatcher which will execute it. Then the mailbox is determined as follows:
- If the actor’s deployment configuration section contains a mailbox key then that names a configuration section describing the mailbox type to be used.
- If the actor’s Props contains a mailbox selection—i.e. withMailbox was called on it—then that names a configuration section describing the mailbox type to be used.
- If the dispatcher’s configuration section contains a mailbox-type key the same section will be used to configure the mailbox type.
- If the actor requires a mailbox type as described above then the mapping for that requirement will be used to determine the mailbox type to be used; if that fails then the dispatcher’s requirement—if any—will be tried instead.
- If the dispatcher requires a mailbox type as described above then the mapping for that requirement will be used to determine the mailbox type to be used.
- The default mailbox akka.actor.default-mailbox will be used.
Default Mailbox
When the mailbox is not specified as described above the default mailbox is used. By default it is an unbounded mailbox, which is backed by a java.util.concurrent.ConcurrentLinkedQueue.
SingleConsumerOnlyUnboundedMailbox is an even more efficient mailbox, and it can be used as the default mailbox, but it cannot be used with a BalancingDispatcher.
Configuration of SingleConsumerOnlyUnboundedMailbox as default mailbox:
akka.actor.default-mailbox {
mailbox-type = "akka.dispatch.SingleConsumerOnlyUnboundedMailbox"
}
Which Configuration is passed to the Mailbox Type
Each mailbox type is implemented by a class which extends MailboxType and takes two constructor arguments: a ActorSystem.Settings object and a Config section. The latter is computed by obtaining the named configuration section from the actor system’s configuration, overriding its id key with the configuration path of the mailbox type and adding a fall-back to the default mailbox configuration section.
Builtin Mailbox Implementations
Akka comes shipped with a number of mailbox implementations:
UnboundedMailbox (default)
- The default mailbox
- Backed by a java.util.concurrent.ConcurrentLinkedQueue
- Blocking: No
- Bounded: No
- Configuration name: "unbounded" or "akka.dispatch.UnboundedMailbox"
SingleConsumerOnlyUnboundedMailbox
This queue may or may not be faster than the default one depending on your use-case—be sure to benchmark properly!
- Backed by a Multiple-Producer Single-Consumer queue, cannot be used with BalancingDispatcher
- Blocking: No
- Bounded: No
- Configuration name: "akka.dispatch.SingleConsumerOnlyUnboundedMailbox"
NonBlockingBoundedMailbox
- Backed by a very efficient Multiple-Producer Single-Consumer queue
- Blocking: No (discards overflowing messages into deadLetters)
- Bounded: Yes
- Configuration name: "akka.dispatch.NonBlockingBoundedMailbox"
UnboundedControlAwareMailbox
- Delivers messages that extend akka.dispatch.ControlMessage with higher priority
- Backed by two java.util.concurrent.ConcurrentLinkedQueue
- Blocking: No
- Bounded: No
- Configuration name: "akka.dispatch.UnboundedControlAwareMailbox"
UnboundedPriorityMailbox
- Backed by a java.util.concurrent.PriorityBlockingQueue
- Delivery order for messages of equal priority is undefined - contrast with the UnboundedStablePriorityMailbox
- Blocking: No
- Bounded: No
- Configuration name: "akka.dispatch.UnboundedPriorityMailbox"
UnboundedStablePriorityMailbox
- Backed by a java.util.concurrent.PriorityBlockingQueue wrapped in an akka.util.PriorityQueueStabilizer
- FIFO order is preserved for messages of equal priority - contrast with the UnboundedPriorityMailbox
- Blocking: No
- Bounded: No
- Configuration name: "akka.dispatch.UnboundedStablePriorityMailbox"
Other bounded mailbox implementations which will block the sender if the capacity is reached and configured with non-zero mailbox-push-timeout-time.
Note
The following mailboxes should only be used with zero mailbox-push-timeout-time.
- BoundedMailbox
- Backed by a java.util.concurrent.LinkedBlockingQueue
- Blocking: Yes if used with non-zero mailbox-push-timeout-time, otherwise No
- Bounded: Yes
- Configuration name: "bounded" or "akka.dispatch.BoundedMailbox"
- BoundedPriorityMailbox
- Backed by a java.util.PriorityQueue wrapped in an akka.util.BoundedBlockingQueue
- Delivery order for messages of equal priority is undefined - contrast with the BoundedStablePriorityMailbox
- Blocking: Yes if used with non-zero mailbox-push-timeout-time, otherwise No
- Bounded: Yes
- Configuration name: "akka.dispatch.BoundedPriorityMailbox"
- BoundedStablePriorityMailbox
- Backed by a java.util.PriorityQueue wrapped in an akka.util.PriorityQueueStabilizer and an akka.util.BoundedBlockingQueue
- FIFO order is preserved for messages of equal priority - contrast with the BoundedPriorityMailbox
- Blocking: Yes if used with non-zero mailbox-push-timeout-time, otherwise No
- Bounded: Yes
- Configuration name: "akka.dispatch.BoundedStablePriorityMailbox"
- BoundedControlAwareMailbox
- Delivers messages that extend akka.dispatch.ControlMessage with higher priority
- Backed by two java.util.concurrent.ConcurrentLinkedQueue and blocking on enqueue if capacity has been reached
- Blocking: Yes if used with non-zero mailbox-push-timeout-time, otherwise No
- Bounded: Yes
- Configuration name: "akka.dispatch.BoundedControlAwareMailbox"
Mailbox configuration examples
PriorityMailbox
How to create a PriorityMailbox:
public class MyPrioMailbox extends UnboundedStablePriorityMailbox {
// needed for reflective instantiation
public MyPrioMailbox(ActorSystem.Settings settings, Config config) {
// Create a new PriorityGenerator, lower prio means more important
super(new PriorityGenerator() {
@Override
public int gen(Object message) {
if (message.equals("highpriority"))
return 0; // 'highpriority messages should be treated first if possible
else if (message.equals("lowpriority"))
return 2; // 'lowpriority messages should be treated last if possible
else if (message.equals(PoisonPill.getInstance()))
return 3; // PoisonPill when no other left
else
return 1; // By default they go between high and low prio
}
});
}
}
And then add it to the configuration:
prio-dispatcher {
mailbox-type = "docs.dispatcher.DispatcherDocSpec$MyPrioMailbox"
//Other dispatcher configuration goes here
}
And then an example on how you would use it:
class Demo extends UntypedActor {
LoggingAdapter log = Logging.getLogger(getContext().system(), this);
{
for (Object msg : new Object[] { "lowpriority", "lowpriority",
"highpriority", "pigdog", "pigdog2", "pigdog3", "highpriority",
PoisonPill.getInstance() }) {
getSelf().tell(msg, getSelf());
}
}
public void onReceive(Object message) {
log.info(message.toString());
}
}
// We create a new Actor that just prints out what it processes
ActorRef myActor = system.actorOf(Props.create(Demo.class, this)
.withDispatcher("prio-dispatcher"));
/*
Logs:
'highpriority
'highpriority
'pigdog
'pigdog2
'pigdog3
'lowpriority
'lowpriority
*/
It is also possible to configure a mailbox type directly like this:
prio-mailbox {
mailbox-type = "docs.dispatcher.DispatcherDocSpec$MyPrioMailbox"
//Other mailbox configuration goes here
}
akka.actor.deployment {
/priomailboxactor {
mailbox = prio-mailbox
}
}
And then use it either from deployment like this:
ActorRef myActor =
system.actorOf(Props.create(MyUntypedActor.class),
"priomailboxactor");
Or code like this:
ActorRef myActor =
system.actorOf(Props.create(MyUntypedActor.class)
.withMailbox("prio-mailbox"));
ControlAwareMailbox
A ControlAwareMailbox can be very useful if an actor needs to be able to receive control messages immediately no matter how many other messages are already in its mailbox.
It can be configured like this:
control-aware-dispatcher {
mailbox-type = "akka.dispatch.UnboundedControlAwareMailbox"
//Other dispatcher configuration goes here
}
Control messages need to extend the ControlMessage trait:
public class MyControlMessage implements ControlMessage {}
And then an example on how you would use it:
class Demo extends UntypedActor {
LoggingAdapter log = Logging.getLogger(getContext().system(), this);
{
for (Object msg : new Object[] { "foo", "bar", new MyControlMessage(),
PoisonPill.getInstance() }) {
getSelf().tell(msg, getSelf());
}
}
public void onReceive(Object message) {
log.info(message.toString());
}
}
// We create a new Actor that just prints out what it processes
ActorRef myActor = system.actorOf(Props.create(Demo.class, this)
.withDispatcher("control-aware-dispatcher"));
/*
Logs:
'MyControlMessage
'foo
'bar
*/
Creating your own Mailbox type
An example is worth a thousand quacks:
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.dispatch.Envelope;
import akka.dispatch.MailboxType;
import akka.dispatch.MessageQueue;
import akka.dispatch.ProducesMessageQueue;
import com.typesafe.config.Config;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.Queue;
import scala.Option;
public class MyUnboundedJMailbox implements MailboxType,
ProducesMessageQueue<MyUnboundedJMailbox.MyMessageQueue> {
// This is the MessageQueue implementation
public static class MyMessageQueue implements MessageQueue,
MyUnboundedJMessageQueueSemantics {
private final Queue<Envelope> queue =
new ConcurrentLinkedQueue<Envelope>();
// these must be implemented; queue used as example
public void enqueue(ActorRef receiver, Envelope handle) {
queue.offer(handle);
}
public Envelope dequeue() { return queue.poll(); }
public int numberOfMessages() { return queue.size(); }
public boolean hasMessages() { return !queue.isEmpty(); }
public void cleanUp(ActorRef owner, MessageQueue deadLetters) {
for (Envelope handle: queue) {
deadLetters.enqueue(owner, handle);
}
}
}
// This constructor signature must exist, it will be called by Akka
public MyUnboundedJMailbox(ActorSystem.Settings settings, Config config) {
// put your initialization code here
}
// The create method is called to create the MessageQueue
public MessageQueue create(Option<ActorRef> owner, Option<ActorSystem> system) {
return new MyMessageQueue();
}
}
// Marker interface used for mailbox requirements mapping
public interface MyUnboundedJMessageQueueSemantics {
}
And then you just specify the FQCN of your MailboxType as the value of the "mailbox-type" in the dispatcher configuration, or the mailbox configuration.
Note
Make sure to include a constructor which takes akka.actor.ActorSystem.Settings and com.typesafe.config.Config arguments, as this constructor is invoked reflectively to construct your mailbox type. The config passed in as second argument is that section from the configuration which describes the dispatcher or mailbox setting using this mailbox type; the mailbox type will be instantiated once for each dispatcher or mailbox setting using it.
You can also use the mailbox as a requirement on the dispatcher like this:
custom-dispatcher {
mailbox-requirement =
"docs.dispatcher.MyUnboundedJMessageQueueSemantics"
}
akka.actor.mailbox.requirements {
"docs.dispatcher.MyUnboundedJMessageQueueSemantics" =
custom-dispatcher-mailbox
}
custom-dispatcher-mailbox {
mailbox-type = "docs.dispatcher.MyUnboundedJMailbox"
}
Or by defining the requirement on your actor class like this:
public class MySpecialActor extends UntypedActor implements
RequiresMessageQueue<MyUnboundedJMessageQueueSemantics> {
// ...
}
Special Semantics of system.actorOf
In order to make system.actorOf both synchronous and non-blocking while keeping the return type ActorRef (and the semantics that the returned ref is fully functional), special handling takes place for this case. Behind the scenes, a hollow kind of actor reference is constructed, which is sent to the system’s guardian actor who actually creates the actor and its context and puts those inside the reference. Until that has happened, messages sent to the ActorRef will be queued locally, and only upon swapping the real filling in will they be transferred into the real mailbox. Thus,
final Props props = ...
// this actor uses MyCustomMailbox, which is assumed to be a singleton
system.actorOf(props.withDispatcher("myCustomMailbox").tell("bang", sender);
assert(MyCustomMailbox.getInstance().getLastEnqueued().equals("bang"));
will probably fail; you will have to allow for some time to pass and retry the check à la TestKit.awaitCond.
Contents


Yi collaborates with stakeholders and users to transform ideas into great user experience.
Yi designs intuitive UI and interaction. Yi's a minimalist who believes that less is more.
Yi prototypes via Html/Css/JS, iOS, Tessel. Yi programs in production level code quality and unit test.
Yi currently work at top ecommerce site as a Full stack engineer which gives him expertise in it.
Yi got his Master degree from SJSU HCI & Human Factor program. Yi studied knowledge of HCI, User Research, Usability, Accessibility and Interaction Design.
Yi practiced UX/UI design practice at companies like Netapp, Rockyou, Agilone, Parc. Learned UX and product design from user and business.
Yi focused on Front end engineer and joined Walmartlabs to help build the next gen walmart.com search and browse experience. Learned and practiced production standard coding skills.


Enter Other Trip Details
{{ errors }}
{% csrf_token %}
Trip Start Date
{% csrf_token %}
Trip End Date
{% csrf_token %}
Number of Adults
{% csrf_token %}
Number of Children
{% csrf_token %}
Budget
Low
Moderate
High
{% csrf_token %}
Transport type
By own Car
Travel's Car
Travel's Bus
{% csrf_token %}
Places type to visit
Beach
Shopping
Historical
Tracking
Religious
Relaxing
Don't want to continue?
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Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s
It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages


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small-thumbnail: http://readux.library.emory.edu/books/emory:b5j2m/pages/emory:p74hn/mini-thumbnail/
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title: Page 35
number: 35
---
{% raw %}MY CONVERSION".{% endraw %}
{% raw %}31{% endraw %}
{% raw %}except what I had heard from my mother, on the{% endraw %}
{% raw %}responsibility of all to a Supreme Being. This was{% endraw %}
{% raw %}Heb. ii. 9, the first text of the Bible to which I had{% endraw %}
{% raw %}ever listened, knowing it to be such. I have never{% endraw %}
{% raw %}forgotten it, and scarcely a day has passed since, in{% endraw %}
{% raw %}which I have not recalled it, and the sermon that{% endraw %}
{% raw %}was preached from it.{% endraw %}
{% raw %}The divine character of Jesus Christ, His tender{% endraw %}
{% raw %}love for mankind, His forgiving spirit, His compas¬{% endraw %}
{% raw %}sion for the outcast and despised, His cruel cruci¬{% endraw %}
{% raw %}fixion and glorious ascension, were all depicted, and{% endraw %}
{% raw %}some of the points were dwelt on with great power;{% endraw %}
{% raw %}great, at least, to me, who then heard of these things{% endraw %}
{% raw %}for the first time in my life. Again and again did{% endraw %}
{% raw %}the preacher reiterate the words "for every man."{% endraw %}
{% raw %}These glad tidings, this salvation, were not for the{% endraw %}
{% raw %}benefit of a select few only.  Oh, the blessedness and sweetness of{% endraw %}
{% raw %}feeling that I was loved ! I would have died that{% endraw %}
{% raw %}moment with joy, and I kept repeating to myself,{% endraw %}
{% raw %}"The compassionate Saviour about whom I have heard{% endraw %}
{% raw %}' loves me,' ' He looks down in compassion from{% endraw %}
{% raw %}heaven on me,' ' He died to save my soul,' and{% endraw %}
{% raw %}' He'll welcome me to the skies.'" I was transported{% endraw %}
{% raw %}with delicious joy. I seemed to see a glorious being,{% endraw %}
{% raw %}in a cloud of splendour, smiling down from on high.{% endraw %}


Orleans UniversalSilo An opinionated, batteries-included, set of templates and libraries to enable you to easily start developing applications with Microsoft Orleans.
Australians toss aside privacy concerns in rush to sign up for virus tracking phone app Contact tracing app a hit across the Tasman.
The Best Medium-Hard Data Analyst SQL Interview Questions By Zachary Thomas<EMAIL_ADDRESS>Twitter, LinkedIn)
How to sell a B2B product by Calvin French-Owen Lately, a bunch of early stage founders have emailed me to ask for go-to-market (GTM) advice. They have a real product, it solves a real problem for their handful of customers…
How does a .NET profiler work? Before doing cool stuff with your .NET profiler, we should understand a few principles
How assembly language loops work More 6502: https://eater.net/6502 Support these videos on Patreon: https://www.patreon.com/beneater or https://eater.net/support for other ways to support. ------------------ Social media: Website: https://www.eater.net Twitter: https://twitter.c...
Ubuntu 20.04 LTS’ snap obsession has snapped me off of it Once lauded for its sane defaults, the latest Ubuntu release has usability issues.
How We Created a Realtime Patient Monitoring System With Go and Vue in 3 days A Pandemic started In the last November in 2019, we heard about the first case of unknown deadly diseases from China. Now everyone knows it as Covid-19 Now it seems to change our lives forever. The virus is deadly and it is highly contagious. Still, we kn...
Awk in 20 Minutes Awk is a tiny programming language and a command line tool. It's particularly appropriate for log parsing on servers, mostly because Awk will operate on files, usually structured in lines of human-readable text.
Complexity Has to Live Somewhere We try to get rid of the complexity, control it, and seek simplicity. I think framing things that way is misguided. Complexity has to live somewhere. Embrace it
Reducing allocations using Span<T> and Memory<T> I decided to look at the RabbitMQ .NET Client source code to make improvements. During that exploration I saw opportunities to reduce memory allocations.


The Unpack object is used to remove the entities from incoming EntityContainers.
Entities are unpacked one by one from the EntityContainer in the same order as they were packed. The time to unpack each entity is specified by the ServiceTime keyword. The received EntityContainer is destroyed once it has been unpacked.


{% extends "agency_list.html" %}
{% block stops-search-url %}{% url 'nc:stops-search' %}{% endblock %}
{% block home-url %}{% url "nc:home" %}{% endblock home-url %}
{% block help-text %}
Enter an agency name into the search field above to review data on the
race/ethnic composition demographics of people stopped, searched, and subjected
to force in the course of traffic stops in a given jurisdiction. Data is
available for most North Carolina departments and officers serving populations
greater than 10,000. North Carolina law requires all such agencies to report
their data on a monthly basis to the NC Department of Justice; however, some
datasets are incomplete or remain unreported. Where data sets are incomplete
or missing from the website, it is because they have not been reported to
the state agency from which the site derives its records. Open Data Policing
does not have access to, nor does it publish, the names of officers, drivers,
or passengers involved in traffic stops.
{% endblock help-text %}
{% block agency-link %}{% url "nc:agency-detail" agency.pk %}{% endblock agency-link %}


--- layout: post title: Oriflame Nature Coconut & Ricemilk Nourishing Hair Mask tags: - Oriflame status: publish type: post published: true meta: _edit_last: '2' _aioseop_keywords: Oriflame Nature Coconut & Ricemilk Nourishing Hair Mask review _aioseop_title: Oriflame Nature Coconut & Ricemilk Nourishing Hair Mask review _yoast_wpseo_linkdex: '0' _thumbnail_id: '4620' _yoast_wpseo_focuskw: '' _yoast_wpseo_title: '' _yoast_wpseo_metadesc: '' _yoast_wpseo_metakeywords: '' _yoast_wpseo_meta-robots-noindex: '0' _yoast_wpseo_meta-robots-nofollow: '0' _yoast_wpseo_meta-robots-adv: none _yoast_wpseo_sitemap-include: ! '-' _yoast_wpseo_sitemap-prio: ! '-' _yoast_wpseo_canonical: '' _yoast_wpseo_redirect: '' ---
Monday is going smooth, since I know tomorrow is a holiday.. and I decide to finish the book about Netaji tomorrow.  Not that I have beautiful locks, in fact you can assume just the opposite of it. So whenever I see some quick fix for my hair, I just need to pick them up and thus I picked up the Oriflame Hair Mask just for the sole reason it has coconut.
I am a coconut freak... I hoard coconut sweets, piña colada yum yum...
Price: Rs. 249 for 150ml My Experience: The thing that stands out the most is the yummy coconut smell, which I absolutely adore... a big thumbs up for that. But as a mask its not a magic product, it a regular hair mask which does its work quietly, while I enjoy the coconut :P This cannot be used as conditioner, as its not a 2 minute mask.  Leaved my hair soft and does not weigh them down. I had been using the Dove hair mask before this and was quite pleased with it.I would recommend this product only to those who love coconut smell, else its just the regular hair mask.
Just one wish not only for Oriflame but for everyone(Dove, Loreal etc etc) ... provide us with a pump packing... a tub packaging is seriously not good when you have to dig in and it leaves behind certain drops of water...pretty please :cute face:
Happy Gandhi Jayanti to everyone!!!


Deuteronomy 2:16
So it came to pass, when all the men of war were consumed and dead from among the people,


Troubleshooting
What are the main features of TextNotes?
TextNotes is a note extension with various useful features:
- Storing notes in the permanent storage of a browser
- Showing titles of notes in flat tree control
- Maintaining notes : add, delete, drag&drop, context menu
- Trashbin for deleted notes
- Changing TextArea size
- Keyboard support
- Hyperclick on URLs, supporting foreground and background tabs
- Supporting display modes : dark, light, auto
- Saving and loading data
- Creating notes from webpages
- Synchronization among multiple local instances
Return to top
Which permissions does TextNotes need and why?
| Permission | Description |
| storage | Local storage area |
| unlimitedStorage | Unlimited storage for heavy users |
| contextMenus | Using context menu |
| activeTab | Launching TextNotes and using context menu |
| notifications | Showing TextNotes notifications |
Return to top
How to launch TextNotes?
TextNotes can run in a tab or in a popup window. You can launch it various ways.
Tab:
- Click on TextNotes icon on toolbar.
- Click on TextNotes item in context menu if no text selection.
- Press Ctrl+Alt+O keys. It is configurable in Manage Extension Shortcuts
Popup window:
- Press Ctrl and Click on TextNotes icon on toolbar.
- Press Ctrl+Alt+P keys. It is configurable in Manage Extension Shortcuts
And TextNotes will be launched on a background tab if you click on
Add Selected Text to TextNotes in context
menu after text selection and there is no running TextNotes in any window.
Return to top
Is there keyboard support?
Tree control has focus :
| Key(s) | Action |
| Ins | New Note |
| Ctrl+Ins | New Separator |
| Del | Delete the current note |
| Up Arrow | Show the previous note |
| Down Arrow | Show the next note |
| Tab | Jump to TextArea |
TextArea has focus :
| Key(s) | Action |
| Tab | Print tab |
| Shift+Tab | Jump to Tree control |
Return to top
How to use hyperclick?
Mouse cursor on
TextArea:
| Mouse + Key(s) | Action |
| Ctrl + Long Click (CapsLock Off) | Open link in a new foreground tab |
| Ctrl + Long Click (CapsLock On) | Open link in a new background tab |
How does it work?
-
Ctrl+MouseDown
TextNotes selects the link around the cursor in the same line.
-
Ctrl+MouseUp
TextNotes opens the selected text as a link.
After pressing
Ctrl+MouseDown you have to wait a moment (~100ms) so that link can be selected.
Do not move the mouse after pressing
Ctrl+MouseDown!
Supported protocol names :
http, https, ftp
Return to top
How to change display mode?
You can set display modes via the
Preferences menu item (top-right corner):
Auto means that display mode comes from your operating system.
Return to top
How to create notes from webpages?
You can create notes from webpages into TextNotes via context menu. Texts can be added
as new notes or can be added into the top note.
Steps:
- Select any text on a page
- Open context menu (right click)
- New menu item appeared : Add Selected Text to TextNotes
- Click on it → new note has been created containing selected text
OR
- Right click on it → selected text has been added into the top note.
- Notification appeared about the action if it was successful.
Return to top
Can I save and load data?
You can save and load your notes via the
Preferences menu item (top-right corner):
TextNotes supports two kinds of file formats :
- Compressed files with a .tn extension
- Readable plain text files with a .txt extension
You can save and load data using either kind.
The format of the plain text file is public so you can feed TextNotes with data files that you created.
Details :
Can TextNotes load data files created by users?
Return to top
Where does TextNotes store the data?
TextNotes stores data on your local machine in permanent storage for WebExtensions.
It is theoretically unlimited.
Details :
Firefox Local Storage [↷]
These data cannot directly be read by users.
Return to top
Is TextNotes reliable?
Yes, TextNotes is reliable if you use it in the proper way.
TextNotes stores the data in its own storage but this storage cannot be read by users.
You have to consider the value of your data and use some backup fitting the importance of your data.
You may face the following errors:
Some program error occurs and TextNotes destroys your data.
It is a fact that there is no program without error. It can be a minor or a major error.
In the worst case scenario all of your data will be lost.
Firefox does not launch the TextNotes WebExtension.
It is possible that Firefox does not launch TextNotes anymore.
This error may come from Firefox or it could be a new release of TextNotes does not run on a
certain version of Firefox.
This kind of error was observed in May 2019 when
all Firefox add-ons stopped working for many days[↷].
Troubleshooting :
TextNotes does not start or the toolbar icon has disappeared.
Firefox does not start.
It is possible that Firefox does not start anymore and of course TextNotes cannot be launched.
Troubleshooting :
TextNotes does not start or the toolbar icon disappeared.
If you are lucky, your data are fine.
Your storage device does not work anymore.
This is probably the worst situation. If you are lucky you can copy some important files.
All of your data will most probably be lost.
Your computer does not work anymore.
If you are lucky, your local storage (
HDD, SDD) can be used in another computer and your data
can be restored. In any event all of your data will be lost.
After considering the importance of your data you can decide what is the best level of protection for you:
Backup levels:
| Level | Storage Place |
| 0. | No backup |
| 1. | Internal storage device - SDD, HDD |
| 2. | External storage device(s) - pendrive |
| 3. | Cloud drive - Google, IBM, Amazon |
Make backups regularly or as often as possible!
Return to top
Is it safe to store my passwords in TextNotes?
No, not at all.
You should not store your passwords or confidential information in TextNotes because
TextNotes does not encrypt your notes and the storage area is not encrypted either.
If you want to store passwords just use a password manager.
Return to top
Does anybody maintain the TextNotes WebExtension?
Yes, TextNotes follows the new versions of Firefox. Besides manual testing,
there are automated tests covering all of the features of TextNotes.
TextNotes is regularly tested manually and by automated tests on :
- Windows and Linux operating systems.
- The previous, the current and the next versions of Firefox.
- The current version of Firefox ESR
Take a look at a
test report of TextNotes.
[↷]
If a bug is found, it will be fixed and released immediately!
Return to top
Can I see the source code of TextNotes?
Yes, it is open source.
You can find it here :
TextNotes
[↷]
Return to top
Can TextNotes load data files created by users?
Yes, the format is public :
unitSeparator = 0x1f // US
delimiter = "\n"${unitSeparator}
1:TextNotes 0.1
2:${delimiter}<SomeText> // ignored
3:${delimiter}<SomeText> // ignored
4:${delimiter}<SomeText> // ignored
After the 4th line, this pattern repeats:
${delimiter}("ITEM" | "SEPARATOR" | "TRASHBIN")"\n"
<Any text without ${unitSeparator}>
Some extra rules:
- You need to have exactly one "TRASHBIN"
- "SEPARATOR" and "TRASHBIN" should not contain any text
Example:
TextNotes 0.1
############################
# DO NOT MODIFY THIS FILE! #
############################
ITEM
Example note
SEPARATOR
TRASHBIN
ITEM
Note in trash
Return to top
Are there bugs in TextNotes?
There are 2 known minor bugs:
- Browser gets stuck for a very short moment
Sometimes when you write some text
in TextArea, characters do not immediately appear but there is some delay. You feel that your browser
always gets stuck for a very short moment and CPU works a bit more. If you restart TextNotes, the bug should
disappear.
- In textarea undo does not work after pressing tab key.
In TextArea the tab key usage removes the undo/redo history.
Return to top
What to do if I need a new feature?
If you need a new feature just
send the developer an email
[↷]. If it is a minor thing, it can be in the next release.
In any event, the state of TextNotes is in "feature freeze" at this time. An advanced
TextNotes2 is being
developed which may contain your feature if it does not fit the current TextNotes.
Please be patient. It is just a hobby project!
Return to top
What to do if I found a bug?
If you found a bug, please
send the developer an email
[↷]. The mail should contain the environmental information ( e.g.
operating system,
version of Firefox and
TextNotes) where you use TextNotes and a description of the bug you have found.
Try to write down the steps involved in how you can reproduce it. If it is a major bug, it will be fixed at once.
The first release of TextNotes was in September 2017 and since then there has been no report about any major
software bug.
Return to top
How can I contribute to the TextNotes project?
If you are satisfied with TextNotes, please make a donation to support it. Thank you!
TextNotes project is looking for volunteer testers to check features and to hunt bugs. If you are interested in it
send the developer an email
[↷]
Return to top
TextNotes does not start or the toolbar icon has disappeared
If you have some basic computer skills, you can attempt to solve problems yourself.
If not, you should ask a professional to help you.
Many things can cause these problems including software or hardware bugs.
Before doing anything, make a backup of your Firefox profile(s) if it is possible:
It is possible that this profile backup can give you one more chance to get your data back.
And now go through the list and try to find your case.
- General issue with Firefox
Check on the internet if there is any global problem with Firefox.
This kind of error was observed in May 2019 when
all Firefox add-ons stopped working for many days[↷].
If you have this kind of error, do not try to reinstall Firefox or TextNotes. Just wait for the fix.
It should come soon.
- Disk is full or went wrong
Check if your disk has free space and whether it is still healthy. If it has some problem, Firefox might not run
properly.
- Firefox has just been upgraded
Although the next versions of Firefox are always tested with TextNotes before releasing it, it is possible
that there is some fatal error meaning TextNotes cannot work anymore with new versions of Firefox.
There are 2 things you can do:
- Wait for the new version of TextNotes which fixes the bug.
If it is a major bug, it will be fixed at once.
- Downgrade your Firefox
Do this at your own risk :
Install an older version of Firefox[↷] and then TextNotes
should work again.
- TextNotes has just been upgraded
Although the new versions of TextNotes are always tested with the current version of Firefox, it is possible
that there is some fatal error meaning the new version of TextNotes cannot work anymore.
In this case you will have to wait for the fix. It will be available shortly.
Return to top
By mistake I selected all text in TextArea
and everything has disappeared after
pressing a button.
TextArea has an undo/redo feature that you can use in this case.
| Key(s) | Action |
| Ctrl+z | Undo |
| Ctrl+y | Redo |
Return to top


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Recent magna cum laude graduate of American University's Kogod School of business. Experienced in research and passionate about entrepreneurship and using data to solve problems.
Conducting research to prepare for and analyze opportunities for a new UN-backed initiative to promote education in countries with high illiteracy rates.
Teaching weekly microeconomics classes with up to 100 students in attendance. Privately tutored for free to ensure success of driven students.
Coordinated in-person, telephone, and email communications with a 100% response rate within 24 hours.
Executed the planning and operation of large events and weddings in an unpredictable environment.
Analyzed environmental policies and translated materials into Arabic for international outreach.
GPA: 3.89
Scored 42 in the International Baccalaureate. Acheived the highest IB scores in Year 12 and 13. GCSE program completed with 5 As and 6A*.
I enjoy exercise and being outside. I love long-distance running and swimming.
I also enjoy creative pursuits including making music, photography, and filming short videos.
Have any questions or want to connect with me? Feel free to send a message and I will get back to you within 48 hours.
Austin, TX 78757, USA
2023676338
ythomure@gmail.com


Basically an Atom is : A basic building block of matter
But what does an atom "look like"? how does it behave? what is it composition? You'll learn about this in subsequent modules. This module was just to remind you of what you've learnt before
Basically an Atom is : A basic building block of matter
But what does an atom "look like"? how does it behave? what is it composition? You'll learn about this in subsequent modules. This module was just to remind you of what you've learnt before
A model is A simplified representation used to explain the working of some real world object or system
So basically a model need not be exactly like the object it explains it just needs to explain the real world object consistently. An example of a model would be using stones to teach a child how to calculate sums of money. The stones are not exactly money but can be used to represent money thus making it easy for the child to sum up amounts of money. The child can easily add up stones and count. Hence the stones are models of a real world object—money.
In physics, we can't always comprehend all the workings nature hence we use models— things we can easily visualize to explain them. the models need not have a true resemblance of the real world object, They just need to explain them consistently
He proposed that the atom is:
Thus Thomson's model explains why the atom could contain negative charge and still remain electrically neutral.
Below is a visualization of thomsons modelIn view of this other theories/models had to be developed in other to explain new experimental discoveries. In the next module we will discuss one of this models.
| Particle | Mass | Charge |
|---|---|---|
| Electron | 9.11×10-31Kg | -1.62×10-19C |
| Proton | 1.673×10-27Kg | +1.62×10-19C |
| Neutron | 1.675×10-27Kg | 0 C |