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Search Results: 1 - 10 of 198513 matches for " N. Arjun "
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An Intuitive Procedure for Converting PDA to CFG, by Construction of Single State PDA
Arjun Bhardwaj,N. S. Narayanaswamy
Computer Science , 2014,
Abstract: We present here the proof for an alternative procedure to convert a Push Down Automata (PDA) into a Context Free Grammar (CFG). The procedure involves intermediate conversion to a single state PDA. In view of the authors, this conversion is conceptually intuitive and can serve as a teaching aid for the relevant topics.
The Method of Finite Difference Regression  [PDF]
Arjun Banerjee
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.81005
Abstract: In this paper I present a novel polynomial regression method called Finite Difference Regression for a uniformly sampled sequence of noisy data points that determines the order of the best fitting polynomial and provides estimates of its coefficients. Unlike classical least-squares polynomial regression methods in the case where the order of the best fitting polynomial is unknown and must be determined from the R2 value of the fit, I show how the t-test from statistics can be combined with the method of finite differences to yield a more sensitive and objective measure of the order of the best fitting polynomial. Furthermore, it is shown how these finite differences used in the determination of the order, can be reemployed to produce excellent estimates of the coefficients of the best fitting polynomial. I show that not only are these coefficients unbiased and consistent, but also that the asymptotic properties of the fit get better with increasing degrees of the fitting polynomial.
Obedient Robot with Tamil Mother Tongue
N. Raju,N. Arjun,S. Manoj,K. Kabilan
Journal of Artificial Intelligence , 2013,
Abstract: In real time it is difficult to access certain places by humans. So, it is better to use a robot that can be controlled from a remote location using voice commands. Our project is to develop a voice based system that works with respect to the commands given in Run time. We are developing a Robot that is controlled by voice commands. The words are recognized using MATLAB. The voice commands include forward, reverse, left turn, right turn etc. After recognizing the words the commands are transmitted to an 8051Microcontroller based system through RF module and RS232 interface. The 8051 is, respectively programmed to control the motor connected to the robot. This project involves both signal processing and communication. The word recognition part is implemented by extracting the formants feature of the speech signals and the values are listed in an excel sheet database. Then, k-Nearest neighbor algorithm based classifier is used to compare the run time input voice with the database. The classifier output gives the word to which the voice command corresponds .The serial communication part involves the transmitting of data with respect to the command detected through an RF module working at 434 MHZ frequency. The data received at the receiver side is decoded and an 8051 based system is used for controlling the motors of the robot.
International Journal on Computer Science and Engineering , 2012,
Abstract: The application of this project is to help the user keep track of his investments and manage his portfolio anytime, anywhere. A system of this sort finds its applications in trading, keeping track of the user's/company's cumulative profit/loss from multiple investments in stocks, mutual funds or fixed income, helping the user keep an eye on the market fluctuations in real-time and aid in financial decision-making even when a user is on the move. The highly interactive and rich Interface of the application is both convenient and inviting to the user, while abstracting the underlying live fetching of data, manipulation and storage. Finally, the techniques will beimplemented on standard available hardware without compromising on performance. It takes advantage of Android, the most successful and popular endeavors of Google till date thus offering great potential in a huge market.
Isolation and characterization of stigmast-5-en-3β-ol (β-sitosterol) from the leaves of Hygrophila spinosa T. Anders
Arjun Patra,S. Jha,P.N. Murthy,,Manik
International Journal of Pharma Sciences and Research , 2010,
Abstract: Purpose: Hygrophila spinosa T. Anders (Acanthaceae) commonly known as ‘Talmakhana’ in Hindi contains a number of phytoconstituents viz. alkaloids, phytosterols, glycosides, amino acids, proteins, phenolic acids, enzymes, vitamins, sugars, minerals, flavonoids, gums & ucilage, terpenoids etc. The objective of the present study was to isolate and characterize phytoconstituents(s) from the chloroform extract of Hygrophila spinosa leaves. Methods: Chloroform extract was subjected to column chromatography and eluted with solvent mixtures of increasing polarity, composed of petroleum ether, benzene and chloroform to isolate phytoconstituents. The structure of the isolated compound was established on the basis of elemental analysis and spectroscopic evidences (IR, UV, 1HNMR, 13CNMR, MS). Results: A sterol, stigmast-5-en-3β-ol was isolated from the chloroform extract of the leaves of the plant. The yield of the compound was 0.0046% w/w, m.p. 136- 1380C, λmax in EtOH: 206 nm, Rf value 0.72 in Toluene: Ether: Cyclohexane (5:2:1). Conclusions: Hygrophila spinosa contains β-sitosterol which may be responsible for various pharmacological activities of the plant.
Our Experience with Autologous Bone Marrow Stem Cell Application in Dilated Cardiomyopathy
Mukund K,Keerthi N,Arjun K.Nambiar,Jayakrishnan AG
Journal of Stem Cells and Regenerative Medicine , 2009,
Abstract: Background - Use of autologous bone marrow stem cell is a newly evolving treatment modality for end stage cardiac failure as reported in the literature. We report our experience with two patients with dilated cardiomyopathy who underwent this treatment after failure of maximal conventional therapy. Methods - A 29 year old Male patient with history of orthopnea and PND, with a diagnosis of dilated cardiomyopathy and echocardiographic evidence of severe LV dysfunction was referred for further treatment. His echo on admission showed EF of 17% and no other abnormal findings except elevated bilirubin levels. He was in NYHA functional class IV. He received intracoronary injection of autologous bone marrow stem cells in January 2009. 254X106 cells were injected with a CD34+ of 0.20%. His clinical condition stabilized and he was discharged home. He received a second injection of 22X106 in vitro expanded stem cells with a CD34+ of 0.72% in Aug 2009. He is now in NYHA class II-III with EF 24%. A 31year old Male patient with history of increasing shortness of breath, severe over the past 3-4 days was admitted for evaluation and treatment. His echo on admission showed EF of 20% and was in NYHA functional class IV. Coronary angiogram was normal and he was stabilized on maximal anti failure measures. He received intracoronary autologous bone marrow stem cell injection of 56X106 with a CD34+ of 0.53% in August 2009. His clinical condition stabilized over the next 10 days and he was discharged home. Conclusions - In our experience of two cases of dilated cardiomyopathy, safety of intracoronary injection of autologous bone marrow stem cells both isolated and in vitro expanded has been proven in both the cases with efficacy proven in one of the cases. Long term follow-up of these two cases and inclusion of more number of similar cases where all available conventional therapies have not resulted in significant improvement for such studies are planned.
Some new approaches to infinite divisibility
Theofanis Sapatinas,Damodar N. Shanbhag,Arjun K. Gupta
Mathematics , 2011,
Abstract: Using an approach based, amongst other things, on Proposition 1 of Kaluza (1928), Goldie (1967) and, using a different approach based especially on zeros of polynomials, Steutel (1967) have proved that each nondegenerate distribution function (d.f.) $F$ (on $\RR$, the real line), satisfying $F(0-) = 0$ and $F(x) = F(0) + (1-F(0)) G(x)$, $x > 0$, where $G$ is the d.f. corresponding to a mixture of exponential distributions, is infinitely divisible. Indeed, Proposition 1 of Kaluza (1928) implies that any nondegenerate discrete probability distribution ${p_x: x= 0,1, ...}$ that is log-convex or, in particular, completely monotone, is compound geometric, and, hence, infinitely divisible. Steutel (1970), Shanbhag & Sreehari (1977) and Steutel & van Harn (2004, Chapter VI) have given certain extensions or variations of one or more of these results. Following a modified version of the C.R. Rao et al. (2009, Section 4) approach based on the Wiener-Hopf factorization, we establish some further results of significance to the literature on infinite divisibility.
Landslide Hazard Mapping of Nagadhunga-Naubise Section of the Tribhuvan Highway in Nepal with GIS Application  [PDF]
Arjun Raj Pandey, Farzad Shahbodaghlou
Journal of Geographic Information System (JGIS) , 2014, DOI: 10.4236/jgis.2014.66059
Abstract: The aim of this project was to prepare and study a hazard map of Nagadhunga-Naubise section of the Tribhuvan highway. This section lies in the Middle Mountain region of Nepal. For the preparation of the hazard map of the corridor three steps, initial study, field investigation, and data analysis and presentation were carried out. In the initial study, the collection of available data and review of the literature were done. The base map was then prepared from the topographical map. In the field investigation step, all information and maps prepared earlier in the initial study were verified by field check. In the final step, prepared and verified data were then analyzed for the hazard mapping. Topography (gradient, slope shape and slope aspect), geology, drainage and land-use were considered to be the major influencing factors in the slope stability. Pre-assigned hazard rating method was used for hazard mapping of the study area. The area was divided into equal facets. Then ratings of responsible factors to the hazard were assigned to each facet and overlaid based upon a predetermined rating scheme. Total estimated hazard was the sum of these ratings for each overlay. Hazard map was prepared by using three categories as low hazard, medium hazard and high hazard. The Geographic Information System (GIS) was the main tool for the data input, analysis, and preparing of the final hazard map. The hazard map showed the areas of different hazard potential classes of; “low” with 32% portion, “Medium” with 51%, and “high” with 17% portion.
Student performance and their perception of a patient-oriented problem-solving approach with audiovisual aids in teaching pathology: a comparison with traditional lectures
Arjun Singh
Advances in Medical Education and Practice , 2011, DOI: http://dx.doi.org/10.2147/AMEP.S15251
Abstract: udent performance and their perception of a patient-oriented problem-solving approach with audiovisual aids in teaching pathology: a comparison with traditional lectures Original Research (3316) Total Article Views Authors: Arjun Singh Published Date December 2010 Volume 2011:2 Pages 9 - 15 DOI: http://dx.doi.org/10.2147/AMEP.S15251 Arjun Singh Department of Pathology, Sri Venkateshwara Medical College Hospital and Research Centre, Pondicherry, India Purpose: We use different methods to train our undergraduates. The patient-oriented problem-solving (POPS) system is an innovative teaching–learning method that imparts knowledge, enhances intrinsic motivation, promotes self learning, encourages clinical reasoning, and develops long-lasting memory. The aim of this study was to develop POPS in teaching pathology, assess its effectiveness, and assess students’ preference for POPS over didactic lectures. Method: One hundred fifty second-year MBBS students were divided into two groups: A and B. Group A was taught by POPS while group B was taught by traditional lectures. Pre- and post-test numerical scores of both groups were evaluated and compared. Students then completed a self-structured feedback questionnaire for analysis. Results: The mean (SD) difference in pre- and post-test scores of groups A and B was 15.98 (3.18) and 7.79 (2.52), respectively. The significance of the difference between scores of group A and group B teaching methods was 16.62 (P < 0.0001), as determined by the z-test. Improvement in post-test performance of group A was significantly greater than of group B, demonstrating the effectiveness of POPS. Students responded that POPS facilitates self-learning, helps in understanding topics, creates interest, and is a scientific approach to teaching. Feedback response on POPS was strong in 57.52% of students, moderate in 35.67%, and negative in only 6.81%, showing that 93.19% students favored POPS over simple lectures. Conclusion: It is not feasible to enforce the PBL method of teaching throughout the entire curriculum; However, POPS can be incorporated along with audiovisual aids to break the monotony of dialectic lectures and as alternative to PBL.
Large transient states in quantum field theory
Berera, Arjun
High Energy Physics - Phenomenology , 2007, DOI: 10.1016/j.nuclphysa.2007.05.009
Abstract: A study is made of the scattering of two large composite projectiles, such as heavy ions, which are initially prepared in a pure quantum state. It is shown that the quantum field theoretic evolution equation for this system, under certain conditions, goes over in form to the master equation of classical statistical mechanics. Thus, the statistical mechanical description of heavy ion collision is viewed as an implied outcome of the Correspondence Principle, which states that in the limit of large quantum number, quantum dynamics goes over to classical dynamics. This hypothesis is explored within the master equation transcription with particular focus on the quark-gluon formation scenario.
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