Friday, December 28, 2012

Important bookmark: excavate your knowledge through us. Part-2

We are again here with new important technical information websites only for my readers......
http://www.uandistar.org/
http://www.radartutorial.eu
http://www.radartutorial.eu
http://www.electronics-tutorials.ws
http://www.citycollegiate.com

there are more to come stay update.............

Monday, September 3, 2012

When should you do MBA ? Directly after B.tech or Work and then ?

Many people in India and other places wonder when should they get MBA ? Some think : why waste and year, just get it right after B.Tech or any Bachelors degree. What is the correct decision ? I was one of those who used to always think like that : ” I should not waste time and get it right away”. But, luckily things did not work out and it is a very good thing I did not do it right away. I feel the importance when I am in classes discussing with fellow class mates

When should you ideally do MBA ?

Ideally, you should at least work for 3 to 4 years and then start MBA.

What difference does it make ?

Work experience makes a huge difference. I can not explain how important it is. Many concepts related to leadership, organization management, change management need work experience. You will not make much out of those classes if you do not have experience. For instance, the question would be: how did you deal with your team ? what conflicts did you encounter as a team manager or member. Think about it, if you have not worked, how would you know ? So, it is very much needed to have work experience.

What point in your career should you do MBA ?

Ideally, MBA is recommended when you want to move into any leadership roles or you started a leadership role and need help to do well. The Golden rule is, you have to work for few years before doing MBA.

What to do in the first 3 years of work ?

Well, if you are a business major you are fine. If not, it is a good idea to start preparing for MBA in year 2 by doing foundation classes and cracking your GMAT.

In fact, most of the top ranked business schools require a work experience of 5 years or more. They know the importance of it. It is good to be a over achiever, but not ideal to get the most of your education.

Saturday, July 14, 2012

How to calculate the subnet number

number of total subnet created=2^x;x=like in class c we have 24 network bits in class c
a/c to class c it should be 192.168.5.139/24
255.255.255.00000000
but insted of this we have
128 64 32 16 8 4 2 1
1 1 1

that is we have 192.168.5.139/27
11111111.11111111.1111111.10001010
with 3 extra bits

anyway now you have to do conversion (in you head). Memorize this
128 = 1
192 = 2
224 = 3
240 = 4
248 = 5
252 = 6
254 = 7
255 = 8
this will lead to 255.255.255.224
2^3rd power = 8 bits available for network portion.
8-3=5 bits are left for host portion.
As for calculating your network numbers
I had 5 of those here. 2^5 = 32. So every 32'nd number is my new network.
0, 32, 64, 96, 128, 160, 192, and 224.

Friday, May 11, 2012

Aim Is Not A Subject

Dear,
"Na jane kis raah par chal diya,jo behta hi le gya" hi readers, i got admitted to school little early, at the age of 3 year,i was very taciturn and dont wann to live the home even for the 1 hour ,but the days passed and a schedule was build up in my subconscious mind that i have to spend my life by going to the school.In first class also called as learning stage, i remember we learn "shabd kosh" and "alphabets".As i grew younger,i got admitted to higher class,and new things comes and what was my job is to learn them all,as that time there is a spoon feeding stage so teacher focus on adding learning abity in the students.this was fine till 8th std. ,but as i got the admission in 9th class,there was no stage left behind and we repeate the same procedure of learning the things, the problems results in 11th std when we were told to select the secince or maths,but at that time we say"btana yar kya lena chahiye".
You dont know but the day you enter the 9th class was your precious year of thinking your future aim,during the 11th std. you were so confused to decide this.And the same problem arises when you were sitting in an interview you make plastic aim infront of the pannel, there you may get succede but not in future life.Believe me its not your fault, its your school fault.If there would be proper session regarding your goal, your aim in life starting from school days there will be less unemployment and one field of education is not so rushed,as everyone have different thoughts.
"sab bhed chall main chley ja rahey hai"
there will not be such type of slogan if your school education pattern include "Aim" as an important subject.
We are only responsible for those websites or pump-lets which says "12vi ke bad kya krey,hummarey pass aye or paye safalta ka sadhan" why we have covered our eyes,why we cant even see that we are so stupid that we ourself give birth to unemploynent.There is not any purpose left behind ,we become slaves,my question from all of you is that "Are you really enjoying your work and if no ,the person responsible for that is only you"
Please help me to recommend this idea to education department of India,so that your child will not suffer from this situation.

Friday, May 4, 2012

My college days

Tuesday, May 1, 2012

I have a time do you?

I was four year old when i first come to see the a fat man running on the wall and suddenly jumps in into the hollow pipe ,eat fresh vegetable and jump across the wall , i was fascinated to see that , i came home and tell that i too wann to go for playing these games but my mumma says that no!!!!! its just a wastage of time. tomorrow i go for the dinner in our campus restaurant and i saw there is a chain of these devices,many people were not in the verge of getting the food instead were busy in playing games on there so called multimedia touch phone.I suddenly realize the momentum of the advancement of technology, an instent came into my mind "kya hoga jab we have kids"???? i was totally mesmerized by the conjuncture.i saw the people as usuall not shouting for there chapati instead they are busy in getting the maximum scores. how fun???

does it really seems to be good "agar mere pass bhi ye gadget hota kya mai bhi esa hi kar rha hota??? i dont know but the view was so bizarre that hardly anyone noticing how much they had eaten the food .Now a days we even dont bother to talk about the fun taht we have during our first year of degree.I think we need to understand the fact that we have to be more precise on the human relationship rather to marry the angry birds.

Friday, April 27, 2012

jab we met with A2C Skills

A2C Skills!!!! A name which has profound meaning, but if you understand it , it will make your memories above worth. It is a corporate training, IT service provider, Documentation and Recruitment company. With more than 100 clients across India.

27apr,2012 it was the day when I really comes to know about the company in real terms .There was the recruitment drive for the various position including Technical writer,API writer, Software Application Developer, Web Developer, Technical Recruiter, Instructional Designer . We were waiting for the interview,a man Amit whom I met there an unknown guy , to share his experience regarding the company presentation session ,he told me that it was something different ,he was mesmerized for the moment!!!, because earlier, he was confused in selecting his job profile, but then he told me that the way they come out through the ppt was something like everybody thinks and i.e. `what the company want of me’???? and probably he got the solution as a web developer. I was watching him and the man, he was so into the talk that I cant even blink my eye, he was enjoying the atmosphere we are sharing, So at that time i feel that the thing that I missed, was really a thought boosting, motivating and way finding.

There were some more sitting around , looking into their resume ,waiting for their turn, and four students who were sitting silently ,I go across them and ask not to be so worry, lets share what you have learn in ppt session. One of the girl sitting at corner sofa told me that there is a 3 month training period and 1 year bond, with 2.5L CTC ,quite fascinating ,and other told that they will go through via online project , no separated platform will be provided.
And i concluded that ,it is a first company which not only amplify their needs but also our interpersonal and technical skills too ,So I can suggest that company has very good present/ future scope, and I, wish to be a part of such an esteemed organization where you will see your own soul and knowledge, and the way how to implement that in a right manner.

Wednesday, March 21, 2012

How to crack job fare

How to get success in job Fare?
Dear friend first of all you should set up the following parameter.

just think what you want to do after 10 year weather you wann to join the
software industry of wann to move to hardware part.

Focusing on that particular abstarct you can decide which type of jobs you can apply and where the hard work is need.
This is for sure if you think of sliding to a particular way the work itself pay you for your hard work.

We are all engineering students and the companies which comes to every college are infosys and TCS in my campus infosys was the company which came for the recruitment and some of all were selected in the process but what about those who cant make it ??????
The big question which comes to everyone mind is that what we should do now?????? i too experiance so much of it .
I dont loose the hope i was like the neophyte but on the otherhand i was also helpless i was alone dont have the contacts with my senior at all, this was very difficult for me to choose the right path.
I start attending job fare and attended about tens to teweles but nothing comes out ya i got the xeperiance but at my night sleep i think only that i was the unemployed.

Look friend you cant be a millianior in one night or a day , dont comes under the pressure that your other friends are placed , its fact we waste our lots of time thinking that our fellow are placed and we still in miseary, nothing comes out of it .

There are some tips that i wann to share with you :

1) whenever you go for the job interview always check about the company profile.

2) first step when you enter the job fair: search for the interviewer his name and linkedin it, its a professional site most of the well known employer have the account in it and check weather he or she belongs to the company you are applying for.

3) Reach in time most important.

4) Always make friends of that particular college whenever you go for fair.

5) Take experiance of interview including BPO or Sales definitely add to you some quality.
6) Be active and appear in all interview.
7) Always keep updated copy of your resume.
8) learn languages like c c++ java and most of it improve your english.
to be continued....................................

Friday, March 16, 2012

PPT Dril

Presentation Templet's For You

Hi friends its been seen that now a days the the art of expressing the work is going to be modern, people start using the modern technology ,and we too start opting that what we called it a power-point PPT .
Everyone is aware of that and implement it for exposure,but the content they want to deliver was not in structured way it should be like the way it is start being processed.
The resign behind the lack of attention to your work is never get interpretive until it is not well structured.
So you must watch the templet's and analysis your mistakes.

http://www.mediafire.com/?d639oib38foinc1

Wednesday, February 29, 2012

Cognitive Radio for emergency and public safety applications/wireless medical networks.

Cognitive radio, which is also referred to as dynamic spectrum access technology or agile radios that automatically find and access un-used spectrum across different networks (licensed and un-licensed including the features of optimization and adaption) can be beneficial when all source of the communication are affected. Currently some companies are working on implementation of

cognitive radios that will work on TV broadcasting bands in order to use the white space that is not of any use in the frequency spectrum of the TV transmission channel, such type of developments are expected to bring beneficial methodologies and solutions to the problems of public safety and emergency case communications, especially related to interoperability issues[2]. However, wide range of opportunities introduced by the awareness, learning and intelligence features of cognitive radios necessitate the reassessment of opportunities to the public safety and emergency case communications from a more complementary aspect. One aspect can be the development of applications that will lead to communicate, locate and reach victims who are stuck in harassed condition one of them may be psychosocial risks of cardiovascular disease we integrated on-the-body sensors with mobile therapies for "just-in-time" stress management. Breathing visualizations and cognitive reappraisal cues appeared on the cell phone when a wireless ECG detected deviations from an individuals' baseline heart rate variability. Reactions from participants validated this concept and highlighted the need for a broader array of therapies and applications that could be shared within relationships and communities. Now this strategy can be made marvelous if we think of implementing an [4] intelligent software agent whose work is to output the data in audio signal so that the use of the device became more easy. [1]

As we see above a how with the help of cognitive radio the woman can check her mood ,the mechanism behind the whole process is that the woman fixes A wireless ECG detector on her body near heart which detects changes in stress levels as measured by deviations in heart rate variability and triggers mobile therapies and as a result she get the result in the audio form. This audio output methodology can be implement on various aspect of our day to day life and during the emergency and public safety applications like in forest fire, hurricane etc. This is like, we are communicating with a device and it is replying what we desire. This can may be consider as a substitute for the apple ‘siri’ but we can’t incorporate it completely as it is not possible to have a data connection everywhere. Adding voice channels to the cognitive radio revolutionaries the whole concept and reform it into an intelligent device. So in this paper we will study how the voice option helps the cognitive radio in order to excavating from the problems of the public safety.

References:

[1] Margaret Morris, Farzin Guilak :Mobile Heart Health: Project Highlight

In Pervasive Computing, IEEE ,PP.57- 61 Date of Current Version : 17 April 2009.

[2] Ali Gorcin Huseyin Arslan : Public Safety and Emergency Case Communications

in: New Frontiers in Dynamic Spectrum Access Networks, 2008. DySPAN 2008. 3rd IEEE Symposium Cognitive Radio,PP 01-10 Date of Current Version : 24 October 2008.

[3] SDR form ,Approved Document SDRF-06-P-0009-V1.0.0 10 September 2008.

[4] Bradbury, D. , Software servants - [IT software]

in: Engineering & Technology PP 58-59 Date of Current Version : 14 July 2009.

Wednesday, February 15, 2012

Download Dictionary To Electronics Free

http://www.mediafire.com/?lgs3spmycsgp8cw

Tuesday, February 14, 2012

Remote Procedure Call (RPC) - Session Layer protocol

Remote Procedure Call (RPC) is a protocol which works in session layer of OSI model and in the Application Layer of TCP/IP model. It is useful in developing network applications which need services from a remote computer in the network. With the help of Remote Procedure Call the programmer need not worry about the complex structure of OSI layer.

WORKING OF REMOTE PROCEDURE CALL

1. RPC is working as a client server model

2. RPC uses different Authentication methods to validate the client request.

3. RPC protocol is independent of transport layer protocols.

4. RPC reuests can use both UDP and TCP but prefer UDP format

In RPC the client issues requests for certain services from server through the network.A client is a computer or process that accesses the services or resources of another process or computer on the network. A server is a computer that provides services and resources, and that implements network services.In short the requesting program is a client and the service-providing program is the server. According to the results of RPC authentication server may reject or accept the request.

Thursday, February 2, 2012

555 and 556 Timer Circuits

555 Timer Circuits

Introduction

Example circuit symbol (above)Actual pin arrangements (below)

There is more information about
555 timers and their circuits on the
Electronics in Meccano website.

The 8-pin 555 timer must be one of the most useful ICs ever made and it is used in many projects. With just a few external components it can be used to build many circuits, not all of them involve timing!

A popular version is the NE555 and this is suitable in most cases where a '555 timer' is specified. The 556 is a dual version of the 555 housed in a 14-pin package, the two timers (A and B) share the same power supply pins. The circuit diagrams on this page show a 555, but they could all be adapted to use one half of a 556.

Low power versions of the 555 are made, such as the ICM7555, but these should only be used when specified (to increase battery life) because their maximum output current of about 20mA (with a 9V supply) is too low for many standard 555 circuits. The ICM7555 has the same pin arrangement as a standard 555.

The circuit symbol for a 555 (and 556) is a box with the pins arranged to suit the circuit diagram: for example 555 pin 8 at the top for the +Vs supply, 555 pin 3 output on the right. Usually just the pin numbers are used and they are not labelled with their function.

The 555 and 556 can be used with a supply voltage (Vs) in the range 4.5 to 15V (18V absolute maximum).

Standard 555 and 556 ICs create a significant 'glitch' on the supply when their output changes state. This is rarely a problem in simple circuits with no other ICs, but in more complex circuits a smoothing capacitor (eg 100µF) should be connected across the +Vs and 0V supply near the 555 or 556.

The input and output pin functions are described briefly below and there are fuller explanations covering the various circuits:

Astable - producing a square wave
Monostable - producing a single pulse when triggered
Bistable - a simple memory which can be set and reset
Buffer - an inverting buffer (Schmitt trigger)

Datasheets are available from:

Inputs of 555/556

Trigger input: when < ¹/₃ Vs ('active low') this makes the output high (+Vs). It monitors the discharging of the timing capacitor in an astable circuit. It has a high input impedance > 2M

Threshold input: when > ²/₃ Vs ('active high') this makes the output low (0V)*. It monitors the charging of the timing capacitor in astable and monostable circuits. It has a high input impedance > 10M

.
* providing the trigger input is > ¹/₃ Vs, otherwise the trigger input will override the threshold input and hold the output high (+Vs).

Reset input: when less than about 0.7V ('active low') this makes the output low (0V), overriding other inputs. When not required it should be connected to +Vs. It has an input impedance of about 10k

Control input: this can be used to adjust the threshold voltage which is set internally to be ²/₃ Vs. Usually this function is not required and the control input is connected to 0V with a 0.01µF capacitor to eliminate electrical noise. It can be left unconnected if noise is not a problem.

The discharge pin is not an input, but it is listed here for convenience. It is connected to 0V when the timer output is low and is used to discharge the timing capacitor in astable and monostable circuits.

connecting a loudspeaker to 555 and 556 outputs

Output of 555/556

The output of a standard 555 or 556 can sink and source up to 200mA. This is more than most ICs and it is sufficient to supply many output transducers directly, including LEDs (with a resistor in series), low current lamps, piezo transducers, loudspeakers (with a capacitor in series), relay coils (with diode protection) and some motors (with diode protection). The output voltage does not quite reach 0V and +Vs, especially if a large current is flowing.

To switch larger currents you can connect a transistor.

The ability to both sink and source current means that two devices can be connected to the output so that one is on when the output is low and the other is on when the output is high. The top diagram shows two LEDs connected in this way. This arrangement is used in the Level Crossing project to make the red LEDs flash alternately.

Loudspeakers

A loudspeaker (minimum resistance 64

) may be connected to the output of a 555 or 556 astable circuit but a capacitor (about 100µF) must be connected in series. The output is equivalent to a steady DC of about ½Vs combined with a square wave AC (audio) signal. The capacitor blocks the DC, but allows the AC to pass as explained in capacitor coupling.

Piezo transducers may be connected directly to the output and do not require a capacitor in series.

Relay coils and other inductive loads

Like all ICs, the 555 and 556 must be protected from the brief high voltage 'spike' produced when an inductive load such as a relay coil is switched off. The standardprotection diode must be connected 'backwards' across the the relay coil as shown in the diagram.

However, the 555 and 556 require an extra diode connected in series with the coil to ensure that a small 'glitch' cannot be fed back into the IC. Without this extra diode monostable circuits may re-trigger themselves as the coil is switched off! The coil current passes through the extra diode so it must be a 1N4001 or similar rectifier diode capable of passing the current, a signal diode such as a 1N4148 is usually not suitable.

Monday, January 30, 2012

Important bookmark: excavate your knowledge through us.

Bookmarks bar

Bulls Eye - CAT, GRE, MAT, MBA Coaching Institute
DMRC Recruitment 2012 – Online Apply for 815 Various Vacancies | FreeJobAlert.com
GPL Online Test Pattern for HCL
Ted Landphair’s America
Listen to English - learn English! - The podcast website for people learning English
The Business – Podcasts | Macmillan Business
English language resources and information for English learners.
Articles in Easy, Understandable English for ESL Learners
Aptitude Questions and Answers - IndiaBIX
Comprehensive list of Search Engines - The Search Engine List
Album : Judaa By : AMRINDER GILL - Play or Download Punjabi Music - WWW.SARKAARI.COM
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Chemistry - Videos - Knol Book - a collection by Narayana Rao

Monday, December 19, 2011

Notch Filter

What is a Notch Filter?

Problem:
What is a Notch Filter?

Solution:
A Notch filter is a filter that passes all frequencies except those in a stop band centered on a center frequency. A closely related Knowledgebase item discusses the concept of the Q of a filter. This Knowledgebase item focuses on high Q notch filters - the type that eliminate a single frequency or narrow band of frequencies. A closely related type of filter - a band reject filter, is discussed in a separate knowledgebase item. The amplitude response of a notch filter is flat at all frequencies except for the stop band on either side of the the center frequency. The standard reference points for the roll-offs on each side of the stop band are the points where the amplitude has decreased by 3 dB, to 70.7% of its original amplitude.

The -3 dB points and -20 dB points are determined by the size of the stop band in relation to the center frequency, in other words the Q of the filter. The Q knowledgebase item will have additional information, but it is hard to talk about the roll-off points of a notch filter without defining the Q, which is the center frequency divided by the bandwidth. In the case of the figure below:

The -3 dB points are at about 1 kHz and 100 kHz for a Q of 0.1 and a center frequency of 10 kHz. At one tenth the bandwidth, approximately 600 Hz and 1.6 kHz, the amplitude is down 20 dB.
The -3 dB points are at about 600 Hz and 1.6 kHz for a Q of 1 and a center frequency of 10 kHz. The -20 dB points, however, are not marked because they are so close to the center frequency.
The response of the bandpass filter with a Q of ten is also shown. The -3 dB points, however, are not marked because they are so close to the center frequency - the same place as the -20 dB for a Q of 1.
So - what is the ultimate limit? Does this mean that any Q is possible? Unfortunately, no. At very high Q values, the response of the circuit will begin to have overshoot and undershoot that will destroy the integrity of the notch. The frequency that was supposed to be rejected may actually be amplified.

The phase response of a notch filter shows the greatest rate of change at the center frequency. The rate of change becomes more rapid as the Q of the filter increases.

The group delay of a notch filter is greatest at the center frequency, and becomes longer as the Q of the filter increases.

A common misconception of notch filter design: Many people think that the higher the Q, the deeper the notch. This is not true. The depth of the notch depends on the matching of components. The Q affects only the location of the -3 dB points, the stop band bandwidth. If the diagram above showed Q values of 0.01 and 0.001, the - 3 dB points would move outward, and the diagram would show a characteristic -20 dB per decade slope until the vicinity of the center frequency. Near the center frequency, the response would curve downward to the center frequency. A first order band rejection frequency would be created, but the response would only be first order with a sharp notch at the center frequency. This is not very useful, the designer would be far better off designing a band reject filter.