Daily Archives: December 24, 2020

  Discuss in detail how the mechanical and magnetic properties of nanomaterials vary with particle size.

1.       Explain with a suitable example, the synthesis of nanostructured materials employing self-assembly, self-organisation and template-based methods.

2.       Discuss in detail how the mechanical and magnetic properties of nanomaterials vary with particle size.

3.       Describe a technique to synthesise nanophase materials. Discuss their applications in various fields.

4.       Why do nanostructured particles find potential applications?

5.       What is meant by surface induced effect?

6.       How are nanostructured particles used for health applications?

7.       What is the relation between properties and applications of nanoparticles?

Describe with a neat sketch how the nanoparticles are prepared employing the top-down methods, namely, milling and lithography.

1.       Describe with a neat sketch how the nanoparticles are prepared employing the top-down methods, namely, milling and lithography.

2.        Explain with a suitable diagram, the synthesis of nanostructured materials using PVD and also reveal the applications by comparing with PECVD.

3.       What is meant by MBE? Explain with a neat sketch the principle, working and synthesis of nanoparticles using MBE, MOVPE and LPE.

4.        How is chemical method different from physical method of synthesis of nanoparticles? Explain the synthesis of nanoparticles using colloids and sol-gel method.

Has inflation increased or decreased since the end of 2002?

1. Figure 8 reports the inflation rate from 1960 to 2002. As this chapter states, inflation continues to be a major a factor in economic policy. Go to ftp://ftp.bls .gov/pub/special.requests/cpi/cpiai.txt. Move data into Excel using the method described at the end of Chapter2. Delete all but the first and last column (date and annual CPI). Graph this data and compare it to Figure 8.

 

a. Has inflation increased or decreased since the end of 2002?

b. When was inflation at its highest?

c. When was inflation at its lowest?

d. Have we ever had a period of deflation? If so, when?

e. Have we ever had a period of hyperinflation? If so,

when?

How would your prediction differ in Problem 13 if the new Keynesian model provides a more accurate description of the economy?

1.How would your prediction differ in Problem 13 if the new Keynesian model provides a more accurate description of the economy? What if the traditional model provides the most realistic description of the economy? 2. If, in a surprise victory, a new administration is elected

 

to office that the public believes will pursue inflationary policy, predict what might happen to the level of output and inflation even before the new administration comes into power. Would your prediction differ depending on which of the three models—traditional, new classical, and new Keynesian—you believed in?

Draw a new diagram that reflects this arrangement and describe the hypothetical phone conversation.

1. What is the major function of the network access layer? 2. What tasks are performed by the transport layer? 3. What is a protocol? 4. What is a protocol architecture? 5. What is TCP/IP? 6. What is the purpose of the Sockets interface? 7. a. The French and Chinese prime ministers need to come to an agreement by telephone, but neither speaks the other’s language. Further, neither has on hand a

 

translator that can translate to the language of the other. However, both prime

ministers have English translators on their staffs. Draw a diagram similar to

Figure 17.8 to depict the situation, and describe the interaction at each layer.

b. Now suppose that the Chinese prime minister’s translator can translate only into

Japanese and that the….

Discuss the advantages and the disadvantages of using a fixed value for the retransmission timer.

1. In order to be able retransmit lost packets, TFTP must keep a copy of the data it sends. How many packets of data must TFTP keep at a time to implement this retransmission mechanism?

 

2. TFTP, like most protocols, will never send an error packet in response to an error packet it receives.Why?

3. We have seen that in order to deal with lost packets,TFTP implements a timeout-andretransmit scheme, by setting a retransmission timer when it transmits a packet to the remote host. Most TFTP implementations set this timer to a fixed value of about 5 seconds. Discuss the advantages and the disadvantages of using a fixed value for the retransmission timer.

o complete the coding for the client and then run the server program in one command window and the client program in each of two further command windows (so that there are two clients communicating with the server at the same time).

This exercise converts the above files into a simple email server and email

 

client respectively. The server conversion has been done for you and is

contained in file EmailServer.java, a printed version of which appears on the

following pages for ease of reference. Some of the code for the client has also

been provided for you and is held in file EmailClient.java, a printed version

of which is also provided. You are to complete the coding for the client and

then run the server program in one command window and the client program

in each of two further command windows (so that there are two clients

communicating with the server at the same time). The details of this

simplified client-server application are given below.

• The server recognises only….

Examine this code and make the necessary additions in the places indicated by the commented lines.

1.If you haven’t already done so, compile and run the server program

 

DayTimeServer and its associated client, GetRemoteTime, from Section 2.3. 2.4 Program Echo is similar to program TCPEchoClient from Section 2.2.1, but

has a GUI front-end similar to that of program GetRemoteTime from Section

2. It provides an implementation of the echo protocol (on port 7). This

implementation sends one-line messages to a server and uses the following

components:

• a text field for input of messages (in addition to the text field for input

of host name);

• a text area for the (cumulative) echoed responses from the server;

• a button to close the connection to the host.

Some of the code for this program has been provided for you in file

Echo.java, a printed copy of which appears at the end of this….

Implement the same electronic chatroom application that you did for exercise

1.Implement the same electronic chatroom application that you did for exercise

 

2. above, but this time using Java's non-blocking I/O on the server. You may

very well be able to make use of your original client program, but have the

client close its socket only after it has received (and displayed) its own 'Bye'

message sent back from the server. You can also now get rid of the code

dealing with any NoSuchElementException.

At the server end, you will probably find it useful to maintain two Vectors,

the first of these holding references to all SocketChannels of newly-connected

clients for which no data has been processed and the second holding

references to instances/objects of class ChatUser. Each instance of this class

should hold references to the SocketChannel and chatname (a String)

associated with an….

write a Java program that uses a while loop to read values from the above text file and displays then in a table under the headings

1. Using a text editor or wordprocessor, create a text file holding a series of

 

surnames and payroll numbers (at least five of each). For example:

Smith

123456

Jones

987654

Jenkins

555555

Now write a Java program that uses a while loop to read values from the above

text file and displays then in a table under the headings 'Surname' and 'Payroll

No.'. (Don't be too concerned about precise alignment of the columns.)

2. Take a copy of the above program, rename the class and modify the appropriate

line so that the program accepts input from the standard input stream (i.e., using

a Scanner around the standard input stream, System.in). Then use redirection to

feed the values from your payroll text file into your program (displaying the

contents as before).