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The module is a lab assignment to help you better understand the very basics of Microsoft Visual Basic queues.

Introduction

This lab module will help you become familiar with the basics of queues in Microsoft Visual Basic. The exercises are written assuming you are using Visual Basic 2005 and the .NET Framework version 2.0 (or later). Some older versions will work the same, but you may need to figure out some differences. It should work with newer version also.

Module prerequisites

You should complete the Visual Basic Threads and Semaphores lab before this one.

Labratory

Part 1

  • In this part you will just put some items on a queue and then take them off and print them.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue.
  • In the Form1_Load method put the following objects on the queue:
  1. The string "Hello"
  2. The string "World"
  3. The number 23
  4. The string "Twenty Three"
  • Now make a for loop that iterates using the Count property of the queue.
  • Inside the loop, dequeue items from the queue and print them to the console.
  • Run your program and record the results.

Part 2

  • In this part you will create two threads where one thread will write to a queue and the other will take the items off and print them. No synchronization will be done in this part. The reading thread will need to keep checking to see if there is anything on the queue.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue. Use the synchronized queue.
  • Make two threads in the Form1 class and start them up in the Form1_Load method.
  • In the method for the first thread:
  1. make a counter variable
  2. make a loop that loops forever
  3. in the loop increment the counter
  4. in the loop put the counter value on the queue
  • In the method for the second thread:
  1. make a loop that loops forever
  2. in the loop make an if statement that checks the count property of the queue
  3. if the count value is not zero, take an element off the queue and print it
  4. if the count value is zero, print a statement that says there was nothing on the queue
  • Run your program and record the results.

Part 3

  • In this part you will create two threads where one thread will write to a queue and the other will take the items off and print them. Synchronization will be done in this part. The reading thread will wait until there is something on the queue then take all the elements off and print them. The writing thread will signal the reading thread when it puts something on the queue.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue. Use the synchronized queue.
  • In the Form1 class make an AutoResetEvent event variable that will be used to synchronize the two threads.
  • Make two threads in the Form1 class and start them up in the Form1_Load method.
  • In the method for the first thread:
  1. make a counter variable
  2. make a loop that loops forever
  3. in the loop: increment the counter, put the counter value on the queue, print a statement telling what was written, signal the AutoResetEvent event with the Set method
  • In the method for the second thread:
  1. make a loop that loops forever
  2. in the loop print a statement saying that the task is about to wait
  3. have the thread wait for the AutoResetEvent event by calling the WaitOne method
  4. after the WaitOne call, make another while loop that keeps removing items from the queue as long as the count is greater than zero
  5. print the value of the element taken off the queue to the console
  • Run your program and record the results.

Part 4

  • This uses the code from the previous part.
  • After writing the value to the queue, have the first thread sleep for 100 ms using the command
Thread.Sleep(100)
  • Run your program and record the results.

Questions & Answers

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Ti dsp/bios lab. OpenStax CNX. Sep 03, 2013 Download for free at http://cnx.org/content/col11265/1.8
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