Friday, December 4, 2009

Star - Delta (Wye) conversion of resistances.












This is something that is not taught in many coaching classes. It is enough to know the formulas or equations required to perform these conversions. Will help a lot in simplifying difficult circuits in Current electricity.

Thursday, November 5, 2009

"The Secret of Understanding and Using the Power of Beliefs for Your Success"

To understand the mind, we can divide it into two parts: conscious mind and sub-conscious mind. We use conscious mind when we knowingly think or do something. Some function like working of our heart is not under conscious control. It is the power of the sub-conscious mind that makes our heart beat about 72 times per minute regularly for up to 100 years.

Beliefs and your subconscious mind

Psychologists have found that we can consciously be aware of only 7 + 2 items at a time. But our sub-conscious mind can be aware of a large number of items at a time. For example, at any time, the sub-conscious is aware of many body functions including blood pressure, heart beats, body temperature, chemical balances, blood flow, taking care of emergencies, etc.

The subconscious mind is not under our conscious control. The sub-conscious mind functions on the basis of information stored in it.
This is the basis of mind programming. Mind programming means that if we can put information in a person's subconscious mind, then we can modify that person's behavior.

The main difficulty is the conscious mind, which does not let us put information in the sub-conscious mind. Actually the conscious mind analyses the information, and discards all that it considers false or non-useful. For example, someone who is not confident, says to himself "I am confident". The conscious mind analyses this sentence and decides that this sentence is false. And it does not put this information into the sub-conscious mind.

Power of Beliefs

A belief is an idea that we accept to be true. It can be a fact, a guiding principle, an opinion, or a faith in someone or something. We can have faith in our teacher or doctor, in the value of being honest or good, in the value of exercise for good health, in our ability to succeed, or in the value of reading newspapers, magazines, and books.

A belief can be conscious or subconscious. Conscious beliefs mean that we know that we believe something. Subconscious belief means that we do not even know that we believe something.

An example of subconscious belief is that we accept to be true what we see on the TV, what we hear on the radio, and what we read in the newspapers.

Beliefs are powerful. Here are a few examples that illustrate how beliefs affect performance.

Elephant and rope

When an elephant is a small baby elephant, it is tied with a big strong chain. It tries hard to escape from the chain, but it can not escape. As the elephant grows, the trainers replace the big strong chain by small rope. Surprisingly, the elephant still remains tied to the rope. It probably thinks "There is no point trying ... I know ... I have tried before and failed ... I am tied with the rope ... I can not escape".

How some new world records were created

In the first half of this century, athletes and trainers believed that human body could not run a mile in 4 minutes. Then, in May 1954, one runner ran a mile in less than 4 minutes. In June of the same year, another person did it again. Since then, hundreds of people have run a mile in less than 4 minutes. It shows that the belief in impossibility was in the mind only.

In weight-lifting it was believed that 500 pounds was the limit for the human body. Many could lift 499, but none 500 or more. Then the trainers fooled a Soviet weight lifter Vasily Alexeev: the actual weight was 501.5 pounds but they told it was only 499. Vasily Alexeev lifted the weight. Once the belief was broken, many other weight-lifters were able to lift more than 500 pounds.

The magic of sugar tablets

The magic of sugar tablets (also called the placebo effect) is well known to the medical doctors. In some placebo studies, patients were given sugar tablets that contained no medicine. But they were told that they were getting some powerful medicine. Many people got cured by sugar tablets. They got well just by believing that they were getting some real medicine. This example shows how the mind affects your body.

Students get high marks because of teachers belief

In one study, educational researchers divided students of equal IQ into two groups. Teachers were told that one group had a high IQ and should get high marks. The other had a low IQ and should get low marks. What do you think was the result? The group which teachers expected to get high marks, really got high marks. The other group got low marks

Saturday, September 12, 2009

Overcoming the Habit of Postponing Actions (Procrastination)


When do we procrastinate actions?

When do we postpone important things that we know we need to do for our success?

It is when we are not sure of success. It is when we are in doubt. Or, it is when the work is boring or unpleasant.

If you have been postponing something for long, look back to find out what is the reason. Once you know the reason, make a decision to do it now / today / this week, without any further delay. Make a commitment to yourself. Make a promise to yourself to finally do it. That is all it takes

Wednesday, September 2, 2009

Differential Equations For Dummies

This plain-English guide explores the many applications of this mathematical tool and shows how differential equations can help us understand the world around us. Differential Equations For Dummies is the perfect companion for a college differential equations course and is an ideal supplemental resource for other calculus classes as well as science and engineering courses. It offers step-by-step techniques, practical tips, numerous exercises, and clear, concise examples to help readers improve their differential equation-solving skills and boost their test scores.


Discover how to:

Classify differential equations

Solve with integrating factors

Work with coefficients

Use handy theorems

Download!


Monday, August 31, 2009

Ranchi paan vendor’s sons crack IIT-JEE

Their ranks in the IIT-JEE may not secure them a seat in one of the IITs, but that’s not the most significant part of their story. Born to poor parents, for Vicky (20) and Vivek (19) it’s their grit and determination, coupled with their father’s support, that helped them crack the Joint Entrance Examination. They have made their mother Rita and father Binod Verma, owner of a paan shop at Kutchery Chowk here, proud. The brothers recall how they studied in the flickering light of a lantern, after helping their father in the shop during the day.

Members of the Kahar (OBC) community, Vicky and Vivek have secured 6,649 and 5,160 rank respectively in the all-India merit list. “Our father has a caste certificate. But we do not want to get into an IIT through reservation quota,” says Vivek. In the quota list,Vicky and Vivek are placed at 902 and 832 rank, respectively.“My father was a drop-out. Hence, he wanted us to study and we did not let him down,” says Vicky as he talks about his father, a matriculate. “Our school was 5 km away; we either cycled or walked,” adds Vivek.


They secured more than 85 per cent marks in their class XII examination. “They were very naughty,” says Talat Shamin, their teacher at Guru Nanak School. “But both of them were studious and since they managed their time well, they excelled in all the subjects.”

Though Binod’s income was limited, he always encouraged his sons to study. “He never hesitated to borrow money to buy us books or arrange for a tutor for us,” says Vivek.

Thursday, August 27, 2009

Look beyond the IITs

It is the dream of all engineering aspirants to get admission to the Indian Institutes of Technology (IITs) but very few actually make the cut. If you fail to clear the exam, take heart; there is no need to get into just any engineering college. A bouquet of technology institutes offer courses that are in much demand. The starting salaries might not be as high as those IITians get, but with a bachelor of technology (BTech) degree from these institutes, you’ll be set on a career path to rival that of any IITian.

Abhijit Mukherjee, senior professor, S.N. Bose National Centre for Basic Sciences, Calcutta, agrees. Mukherjee, who was a professor at IIT Kanpur for years, believes that for a large number of students from the urban middle class, life after school is all about getting into the IITs.


“But they — as well as their parents — are simply not aware that institutes such as the Indian School of Mines University (ISMU) in Dhanbad are as good as the IITs. Besides, in recent times, they have introduced a lot of fresh job-oriented courses,” he says. “I wish parents would take an informed decision while choosing educational institutes.”

Choices galore

Just like the ISMU, a handful of other institutes offer coveted BTech degrees in subjects as varied as mining and petroleum engineering, leather technology, plastics technology, dairy technology and aerospace engineering. Institutes such as the Indian Institutes of Information Technology (IIIT) in Allahabad, Gwalior and Hyderabad also offer courses in such popular subjects as information technology, computer science, and electronics and communications engineering.

“Students presume that only the IITs have the best infrastructure,” says S. Sugumar, chief manager (technical), Central Leather Research Institute (CLRI), Chennai. “Also, the high salary offered to IIT graduates during campus recruitment makes students presume that there is nothing beyond the IITs,” he adds. But the institutes that offer specialised courses have state-of-the-art infrastructure and fully equipped laboratories to train students in their respective disciplines.

Institution speak

Take the National Institute of Pharmaceutical Education and Research (Niper), Chandigarh. It offers postgraduate degrees in pharmaceutical sciences to students with a science background. Besides the master of technology (MTech) and master of pharmacology (MPharm) courses, Niper also offers an MBA in pharmacology and a PhD in various disciplines. “Students at Niper are recruited by the pharmaceutical industry, intellectual property rights firms and consultancy agencies,” says P. Ramarao, director, Niper.

“There is a need to look at alternatives beyond the IITs,” says Uma Shankar Tiwary of IIIT, Allahabad, which offers a BTech degree in information technology and electronics and communications engineering. According to him, it is the lack of technical higher education institutions in India that leave students with little choice.

Some institutions have realised the need to expand beyond their specialised disciplines. ISMU was set up in 1926 on the pattern of the Royal School of Mines, London, to teach mining engineering and applied geology to students and thus provide manpower to the minerals industry. “Our institution has now become a full-fledged university offering courses in mechanical, environmental, computer and industrial engineering, apart from integrated MSc and management programmes,” says Kampan Mukherjee, dean, academics, ISMU.

“Very few youngsters are aware that there is a huge demand for skilled professionals in the booming space industry,” says B.N. Suresh, director of the Indian Institute of Space Science and Technology (IIST), Thiruvananthapuram. “To address the talent crunch at the Indian Space Research Organisation (Isro), the IIST was set up in 2007,” he adds.

Mukherjee laments that because of sheer ignorance even brilliant students ignore these institutes and opt for private institutes. “Some of the private institutes are really shady, with poor infrastructure and only a handful of permanent faculty members. Most of the government-run technology institutes, on the other hand, have a proven track record. Moreover, many of the old institutes like the ISMU have been revamped recently,” he adds.

Admissions to these institutions are based on various parameters like the joint entrance examination, interview and group discussion (for management programmes). While the ISMU and IIST recruit students through the IIT joint entrance examination (IIT-JEE), institutions such as Niper and Cental Institute of Plastics Engineering and Technology (Cipet) conduct their own entrance exams.

CLRI admits students through an entrance examination conducted by Anna University and admission to the IIITs is through the All India Engineering Entrance Examination (AIEEE).

Placement & perks

Alkesh Patel, a 27-year-old postgraduate in intelligence systems from IIIT, Allahabad, works as a product manager for the news and entertainment portal rediff.com. “My work involves automating processes, aggregating news and studying the latest development in my sector,” says Patel, who feels that the high stress level is the only disadvantage of his job. According to him, an MTech graduate can earn up to Rs 10 lakh per annum at entry level while a mid-level position commands Rs 12 lakh to Rs 15 lakh per annum and a senior person can aim for Rs 25 lakh per annum.

Students opting for undergraduate mining courses find employment at Indian and foreign companies and the average salary ranges between Rs 7 lakh and Rs 8 lakh per annum. “The salary that a postgraduate from Niper earns at the beginning of his career ranges from Rs 2 lakh per annum to Rs 12.5 lakh per annum,” says Ramarao.

CLRI graduates are paid on a par with those in the IT industry and the salary ranges between Rs 3 lakh and Rs 7 lakh. “Leading leather and chemical companies like Clariant, TFL (German manufacturing company) and BASF (German chemical firm) recruit our students,” says Chandra Shekhar, head, education training department, CLRI.

Students can even diversify and join allied industries. “I have partially deviated from my career path but nevertheless I am involved with my subject from a global perspective,” says Viswanad Bhomi, a senior business analyst at E-Value Serve, a knowledge process outsourcing (KPO) firm in Gurgaon, who joined the firm after completing PhD in pharmacology from Niper.

LEARNING HUBS

National Dairy Research Institute
The main campus is in Karnal, Haryana, with two regional centres in Bangalore and Kalyani, West Bengal www.ndri.res.in

Central Leather Research Institute, Chennai
Founded in 1948, CLRI is a central hub in the leather sector with work area spanning academic programmes to testing, research and designing leather products
www.clri.org

Indian School of Mines University, Dhanbad
This institution of international acclaim offers a host of programmes such as BTech, MTech, MSc Tech, MBA, MPhil and PhD www.ismdhanbad.ac.in

Central Institute of Plastics Engineering and Technology, Chennai
Established in 1968, Cipet offers doctoral, postgraduate, graduate, and diploma programmes in plastics technology www.cipet.gov.in

Indian Institute of Space Science and Technology, Thiruvananthapuram
IIST offers BTech courses in avionics and aerospace engineering and physical sciences. It offers MTech in softcomputing, RF and microwave communications, and applied and adaptive optics www.iist.ac.in

Tuesday, August 25, 2009

Class 12 marks may become critical for IIT admission

Times of India:Marks scored in the Class XII board examinations are likely to become a key determining factor in addition to the performance in the nerve-wracking Joint Entrance Examination (JEE) for admission into the prestigious Indian Institutes of Technology (IITs) by 2011
In a couple of months, a pan-IIT committee constituted by the union human resources development (HRD) ministry to suggest reforms to the JEE is expected to submit its report recommending ways and means to factor in the marks scored by students in higher secondary examinations while preparing the IIT merit list. A meeting of all IIT directors and JEE representatives held in Chennai over the weekend discussed the proposed changes.


The proposal comes amidst widespread concern among top academicians over the current IIT admission system which is entirely dependant on JEE scores and ignores academic performances in board exams. The inherent weakness of such a system is that the IITs have been able to largely attract only students who have been "conditioned for the JEE" by high profile coaching centres in Kota and Hyderabad. Such students who lack "raw intelligence", as described by IIT Madras director M S Ananth in the past, are sometimes at sea after entering the campus.

"We hope to devise a methodology to compute a normalised class XII cut-off eligibility score for each educational board (CBSE, ICSE, and State Boards). If it is approved, only students who have scored this cut-off mark would become eligible to appear for the JEE and consecutively for admission," IIT Madras deputy director V G Idichandy, who is heading the committee, said on Monday. The present eligibility norm of an aggregate score of 60% in Class XII determined by the IIT standing council, as opposed to 85% recommended by a JEE review committee four years ago, is considered too low a benchmark.

"We are collecting data on Class XII results of the past four to five years from different boards in all states to base our recommendation on. Much will depend on how we compute an acceptable method to normalise the marks scored in different boards. You have nearly 40 boards of education in India," Professor Idichandy said.

However, the more difficult part will be to convince authorities of all the boards to declare Class XII results within a specified timeframe every academic year.

"This will be crucial for us as we have to base the JEE on the Class XII results. I personally think that this is where a common school board, at least at the level of higher secondary education, which has been proposed by the HRD minister Kapil Sibal, will be of help in determining any all-India merit list," he contended.

Idichandy acknowledged that the JEE cannot be abolished "but we want to give as much importance as possible, for the performance of students at the school level" in the IIT admissions.
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