Indian research publications and abstracts.

[Skull and Bones]

As i proposed earlier, this is a thread dedicated to published Indian scientific research papers, articles and abstracts.

I request Moderators to make it a sticky.

Thanks

 

[Skull and Bones]

IISc professor devises means to avert Air Crashes

Algorithm can detect and destroy a target

Bangalore: Mid-air collisions are disastrous. Potential collisions are chilling. Developing technologies that sense an oncoming collision are vital to save lives and aerospace scientist Radhakant Padhi of IISc has done precisely that.

Padhi has developed a technology that can prevent mid-air collisions of manned and unmanned UAVs and potentially those of commercial aircraft too. Padhi’s technology, known as the MPSP algorithm, is a series of pre-installed instructions which can detect and destroy a target. “Mission-specific instructions are fed into a flight device that ensures that an aerospace vehicle reaches its destination even if it deviates from the pre-defined path. The algorithm acts as the virtual brain of a flight vehicle.”

As UAVs fly at a low altitude, they tend to collide with low-lying objects and even other flying UAVs. “An algorithm had to be worked out that could detect and avoid these objects and other UAVs. The algorithm is a set of instructions and computations that enables this. It is an intelligent system that enables guidance and control,” Padhi explained.

Padhi’s algorithm which has features of smart intelligence can be used in aircraft that are also conventional. The devices with the algorithm/instructions would identify objects flying towards or in the path of the aircraft by detecting their presence and enabling preventive action. The advance detection is a crucial function of the algorithm based on mathematical predictive models.
Padhi who started work on the algorithm while doing his ME in aerospace at the IISc, in 1996, gave it a conclusive form while working on advanced missile technology at the Research Centre Imarat, DRDO. He developed an advanced version of the MPSP algorithm while working on one of the missile guidance problems in 2005.

Padhi, currently working as an associate professor at the department of aerospace engineering at IISc, has specialised in fields such as intelligent control using neural networks, development of efficient numerical algorithms for advanced guidance and control design, guidance and control system design for short/long-range missiles, guidance and control system design for launch vehicles and advanced nonlinear control system design for modern aircraft.

Padhi, who has now received a funding of $80,000 from the Air Force Research Lab, US, to develop collision avoidance algorithms for UAVs, shot to fame in the US after preparing a paper on the technology. Avoiding mid-air collisions being a top priority, the paper attracted global attention.

Padhi has already completed related work in this field with a Rs 15 lakh-project for a South Korean University to design advanced control technology for a challenging supersonic air-breathing engine through a local company in Bangalore.

FIELD TRIALS DRDO will conduct field trials of a defence shield over Indian airspace A shield can intercept and destroy any incoming ballistic missile DRDO will use Padhi’s technology in the trials. A flight test of the anti-missile system will be undertaken again in June to build ballistic missile defence (BMD) shield against incoming medium- or long-range missiles

http://alumni.iisc.ernet.in/pdfs/padhi1.pdf

Link to MPSP introduction

http://www.ijicic.org/07-253-1.pdf

 

[Skull and Bones]

Hydrogen engine: research and development (R&D) programmes in Indian Institute of Technology (IIT), Delhi


Abstract

Active research in the development of hydrogen-fuelled low-emission engines is being pursued at the Engines and Unconventional Fuels Laboratory of the Indian Institute of Technology (IIT), for a period of close to two decades. This paper highlights the significant pursuits and attainments of the research and development (R&D) activities carried out in IIT, Delhi on hydrogen-operated engines. Both spark ignition (SI) and compression ignition engine test rigs have been developed and instrumented for the use of hydrogen fuel. Several existing petroleum-fuelled engine configurations have been modified by taking care to observe that the converted system does not need substantial hardware modifications. Various fuel induction techniques have been experimentally evaluated keeping in view the temperamental combustion characteristic of this fuel. Curative and preventive steps have been adopted and suitable retrofits and subsystems have been installed at the appropriate locations to preclude the possibility of any undesirable combustion phenomena such as backfire, knocking and rapid rate of pressure rise. Performance, emission and combustion characteristics of the systems have been determined. It has been observed that an appropriately designed timed manifold injection system can overcome the problem of backfire in a hydrogen engine. NOx emission level from a hydrogen-operated SI engine can be drastically reduced by way of lean engine operation.

Test rig.

ScienceDirect.com - International Journal of Hydrogen Energy - Hydrogen engine: research and development (R&D) programmes in Indian Institute of Technology (IIT), Delhi

 

[Skull and Bones]

Review of hypersonic research investigations in IISc shock tunnel (HST1)


Abstract

Real gas effects dominate the hypersonic flow fields encountered by modern day hypersonic space vehicles. Measurement of aerodynamic data for the design applications of such aerospace vehicles calls for special kinds of wind tunnels capable of faithfully simulating real gas effects. A shock tunnel is an established facility commonly used along with special instrumentation for acquiring the data for this purpose within a short time period. The hypersonic shock tunnel (HST1), established at the Indian Institute of Science (IISc) in the early 1970s, has been extensively used to measure the aerodynamic data of various bodies of interest at hypersonic Mach numbers in the range 4 to 13. Details of some important measurements made during the period 1975–1995 along with the performance capabilities of the HST1 are presented in this review. In view of the re-emergence of interest in hypersonics across the globe in recent times, the present review highlights the suitability of the hypersonic shock tunnel at the IISc for future space application studies in India.

Review of hypersonic research investigations in IISc shock tunnel (HST1) - Springer

 

[Skull and Bones]

@KRAIT, check this.

Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor

The recent discovery of graphene has led to many advances in two-dimensional physics and devices. The graphene devices fabricated so far have relied on SiO2 back gating. Electrochemical top gating is widely used for polymer transistors, and has also been successfully applied to carbon nanotubes. Here we demonstrate a top-gated graphene transistor that is able to reach doping levels of up to 5×1013 cm−2, which is much higher than those previously reported. Such high doping levels are possible because the nanometre-thick Debye layer in the solid polymer electrolyte gate provides a much higher gate capacitance than the commonly used SiO2 back gate, which is usually about 300 nm thick. In situ Raman measurements monitor the doping. The G peak stiffens and sharpens for both electron and hole doping, but the 2D peak shows a different response to holes and electrons. The ratio of the intensities of the G and 2D peaks shows a strong dependence on doping, making it a sensitive parameter to monitor the doping.

http://www.nature.com/nnano/journal/v3/n4/full/nnano.2008.67.html

Indian research houses seems to have been showing some interest in Nanoelectronics research. Only if i had that kind of brain to get into IIT or IISC.

Nanotechnology is a new technology which is generating a lot of interest among academicians, practitioners and scientists. Critical research is being carried out in this area all over the world. Governments are creating policy initiatives to promote developments in the nanoscale science and technology developments. Private investment is also seeing a rising trend. Large number of academic institutions and national laboratories has set up research centers that are working on the multiple applications of nanotechnology. Wide ranges of applications are claimed for nanotechnology. This consists of materials, chemicals, textiles, semiconductors, to wonder drug delivery systems and diagnostics. Nanotechnology is considered to be a next big wave of technology after information technology and biotechnology. In fact, nanotechnology holds the promise of advances that exceed those achieved in recent decades in computers and biotechnology. Much interest in nanotechnology also could be because of the fact that enormous monetary benefits are expected from nanotechnology based products. According to NSF, revenues from nanotechnology could touch $1 trillion by 2015. However much of the benefits are projected ones. Realizing claimed benefits require successful development of nanoscience and nanotechnology research efforts. That is the journey of invention to innovation has to be completed. For this to happen the technology has to flow from laboratory to market. Nanoscience and nanotechnology research efforts have to come out in the form of new products, new processes, and new platforms. India has also started its Nanoscience and Nanotechnology development program in under its 10th Five Year Plan and funds worth Rs. One billion have been allocated for Nanoscience and Nanotechnology Research and Development. The aim of the paper is to assess Nanoscience and Nanotechnology initiatives in India. We propose a conceptual model derived from the resource based view of the innovat- ion. We have developed a structured questionnaire to measure the constructs in the conceptual model. Responses have been collected from 115 scientists and engineers working in the field of Nanoscience and Nanotechnology. The responses have been analyzed further by using Principal Component Analysis, Cluster Analysis and Regression Analysis.

IEEE Xplore - Assessment of nanoscience and nanotechnology initiatives in India

 

[Mech]

Hi guys, a humble request from a person working in a similar academic setting. Please take it off. Please discontinue this.

Regards,
@KRAIT @Skull and Bones

 

[KRAIT]

@Mech Actually we are not posting entire articles by wrong methods. Abstracts and few complete papers are available on Internet.

Complete papers won't be published. I have my papers too. I won't mind if someone post my paper's abstract. But if someone buy it and then post it here, that will be wrong.

 

[Skull and Bones]

@Mech

All the posts are public bro, any one can see it by simple keyword search in Google and Microsoft Academics. I'm just putting it in a single thread.

I'll delete the posts if anyone has any problems with it.

 

[KRAIT]

@Mech All the posts are public bro, any one can see it by simple keyword search in Google and Microsoft Academics. I'm just putting it in a single thread. I'll delete the posts if anyone has any problems with it.

Lets make a rule. Only Abstracts. Even not putting Working Papers.

Full papers which are available on arxiv.org. etc. paste the abstract and link. That's it.

 

[Mech]

@KRAIT and @Skull and Bones

You may not realize it, but there is an immense risk of giving insight to people who aren't looking for it in the first place. I realize what your'e trying to do and i like it, I really do. But the reality we live in must also be taken into account. As the thread grows perhaps someone might get careless....someone might consider copy pasting thesis documents off their professor's computer on this thread for the sake of earning rep. Newbies in defense sectors might post some stuff off their work materiel.

I am asking you because i've seen it happen before.

My sincere advise is to take it down. Its not necessary.

 

[Skull and Bones]

Lets make a rule. Only Abstracts. Even not putting Working Papers.

Full papers which are available on arxiv.org. etc. paste the abstract and link. That's it.

Okay, only abstract and introduction will be posted.

Few links on full works removed, swapped by restricted links.

 

[KRAIT]

@Skull and Bones Buddy, this point of @Mech is valid.

What say ? I agree with this that if even one such incident happens, it will cause problem for the author who submits it for publication and the journal declare his paper as plagiarism.

 

[Skull and Bones]

@Skull and Bones Buddy, this point of @Mech is valid.

What say ? I agree with this that if even one such incident happens, it will cause problem for the author who submits it for publication and the journal declare his paper as plagiarism.

I don't think one can move much further with just abstract, isn't it?

And if one's looking for citations on his/her area of interest, he can get easily. A thread will have marginal effect on it. Anyay, it's your wish brothers, i'll stop posting.

 

[KRAIT]

@Skull and Bones Naa, keep it. I just wanted your input about the issue. We should keep it on Defense related.

 

[danger007]

nice thread...