Showing papers by "Sir Padampat Singhania University published in 2012"

Advanced perturbation and observation (P&O) based maximum power point tracking (MPPT) of a solar photo-voltaic system

Abstract: In this paper, a novel algorithm based MPPT has been suggested for extracting maximum possible power from PV module. The proposed algorithm for controlling the MPPT is based upon the mostly used Perturb and Observe (P&O) method. Along with the proposed algorithm, different existing algorithms have been compared in terms of their tracking speed and implementation complexity. The solar module characteristics (I-V and P-V) have been simulated in MATLAB. The simulation results for various parameters of boost converter have also been obtained. In this paper, we discuss the results of our study of an improved maximum power point tracker (MPPT) of a PV system. The proposed MPPT algorithm is based on the incremental perturbation and observation (IP&O) strategy in which the perturbation steps have been increased to get closer to the maximum power point with minimum possible oscillations. The PV power system, using the proposed MPPT, will be able to optimally track maximum power points with minimum possible oscillation around maximum power points (MPPs). Consequently the light to electricity conversion efficiency can be improved significantly.

Accelerating Bianchi Type-V Cosmology with Perfect Fluid and Heat Flow in Saez-Ballester Theory

Abstract: In this paper we discuss the law of variation of scale factor $a = (t^{k}e^{t})^{\frac{1}{n}}$ which yields a time-dependent deceleration parameter (DP) representing a new class of models that generate a transition of universe from the early decelerated phase to the recent accelerating phase. Exact solutions of Einstein's modified field equations with perfect fluid and heat conduction are obtained within the framework of Saez-Ballester scalar-tensor theory of gravitation and the model is found to be in good agreement with recent observations. We find, for n = 3, k = 1, the present value of DP in derived model as q_0 = -0.67 which is very near to the observed value of DP at present epoch. We find that the time-dependent DP is sensible for the present day Universe and give an earmark description of evolution of universe. Some physical and geometric properties of the models are also discussed.

Effects of target polarization and postcollision interaction on the electron-impact single ionization of Ne(2p), Ar(3p), and Na(3s) atoms

Abstract: We report the perpendicular plane ionization results of ($e$, 2$e$) triple-differential cross sections for the Ne(2$p$) and Ar(3$p$) atoms at the incident electron energies ranging from 5 to 50 eV above ionization potential for neon atoms and from 2 to 50 eV above ionization potential for the argon atoms. The present investigation has been done in the modified distorted wave Born approximation and it has been observed that postcollision interaction and polarization of target are important in the perpendicular plane ionization of atoms. We also present the results of triple-differential cross section for the doubly symmetric coplanar ionization of Na(3$s$) atoms at the incident electron energy ranging from 6 to 60 eV above ionization potential. Thus we are able to see the effects of target polarization and postcollision interaction in coplanar as well as the perpendicular plane geometrical conditions. The results of our calculations for the Ne(2$p$) and Ar(3$p$) have been compared with the very recent measurements of Nixon et al. [K. L. Nixon, A. J. Murray, and C. Kaiser, J. Phys. B 43, 085202 (2010)] and the results of coplanar ionization of Na(3$s$) have been compared with the experimental data of Murray [A. J. Murray, Phys. Rev. A 72, 062711 (2005)]. It is observed that there are certain discrepancies between theoretical and experimental results which indicate that further theoretical efforts are required to understand the cross section trends of neon, argon, and sodium atoms. The cross section in the perpendicular plane ionization exhibits complex variations as a function of incident energy and target.

A Study of Corporate Web Reporting Practices in India

Abstract: This study was conducted to know the extent of web reporting practices in the Indian corporate sector and inter-sector comparison of web reporting practices. A sample of 50 companies from different sectors was covered for this purpose. The analysis of results of the study shows that about 80% of the sample companies provided mandatory and voluntary information. The banking sector provided financial information to a greater extent compared to the other sectors. Balance sheet and profit and loss account have been provided in a majority of the cases, and only a few companies provided the director’s report and auditor’s report. Most of the companies provided information about the company profile, company history, company products and services, etc. and did not give any relevant information from the user’s point of view. Results show that the Indian companies have started using the Internet as a medium for reporting. Though the percentage of companies giving information for investor’s use is not very high, there are chances of an increasing trend in the Indian corporate sector. The percentage of Indian companies reporting via Internet is low compared to other advanced countries, but will gain importance in the future. The paper suggests that greater stress should be given to providing up-to-date financial information and to including full annual report while presenting information on websites. Awareness should be created among various users regarding corporate web reporting, and users’ perception should be kept in mind while providing web disclosures.

Analyzing Trends and Profitability Vis-À-Vis Working Capital Management (WCM): A Study of Select Information Technology (IT) Organizations in India

Abstract: In the prevalent business milieu, where the companies are fighting tooth and nail to gain market pie, managing financial resources is the Hobson's choice for continued existence. Working capital management is an integral component of corporate strategy for managing overall financial resources. However, the appropriateness of working capital management is rooted to its potency to Institute trade-off between liquidity and profitability. The IT industry in India has ousted the growth pattern of other sectors and is witnessing a relatively steep growth rate. Moreover, the industry is equally growing in size with the incorporation of new companies day after day. Consequently, the companies are caught in pincers due to the burgeoning competition outwardly, and financial resources restrain within. A plethora of research works in the related area has been so far undertaken in the manufacturing sector; however, the service industry is largely ignored. Thus, this study makes an attempt to analyze the size, composition and trends in working capital employed by select Indian IT companies. The study employs correlogram analysis of time series data for ten years corresponding to WC of each select IT company. The analysis estimates an increased requirement of WC in the future for IT companies in India. In addition, the study investigates the significance of relationship between profitability and working capital employed by the select IT companies. The value of Pearson Correlation coefficient corresponding to each company signifies a positive relationship between WC and Profitability largely.

Ethical Challenges in Accounting: an Indian Case

Abstract: Accountant working in the private or public sector companies must remain impartial and loyal to ethical guidelines when reviewing a company or individuals financial records for reporting purposes. People are expecting a lot from the professional community and the quality of the complex services provided by the accounting profession have confidence. Of The information provided by accountants should significantly efficient, reliable, genuine and disinterested, then not only should be qualified accountants and professional competence are But also enjoys a high degree of honesty and integrity, professionalism and professional reputation is their most important assets. The Moral Accounting for Professional Accountants And those who rely on accounting services is very important. Businesses rely heavily on accounting ethics, whether they're aware of it or not. Unless investors, creditors and managers can be reasonably confident that the financial record keeping practices of their accounting professionals are honest, straightforward and consistent with industry standards, it is unlikely they can trust their records' accuracy. From Enron, and Satyam, it appears that corporate accounting fraud is a major problem that is increasing both in its frequency and severity. Research evidence has shown that growing number of frauds have undermined the integrity of financial reports, contributed to substantial economic losses, and eroded investors’ confidence regarding the usefulness and reliability of financial statements.

Multiclass classifier designing by Modified Crossover and Point Mutation technique using genetic programming

Abstract: A Multiclass classifier is an approach for designing classifiers for an m-class (m>=2) problem using genetic programming (GP) In this paper we proposed two methods named Modified Crossover Method and a Point Mutation method In Point Mutation technique we are generating the two child from single parent and selecting the one child on the basis of fitness and also applying the elitism on the child so that the mutation operation does not reduce the fitness of the individual and in Stepwise Crossover we select the two child for the next generation on the basis of size, depth and fitness along with elitism on each step from the six child which is generated during crossover To demonstrate our approach we have designed a Multiclass Classifier using GP by taking few benchmark datasets The results obtained show that by applying Modified crossover together with Point Mutation improves the performance of the classifier

Effect of Temperature on Gate Leakage Current in P4 and P3 SRAM Cells at Deep Sub-micron CMOS Technology

Abstract: The explosive growth of battery operated semiconductor devices has made low-power design a priority in recent years. The effect of temperature on the leakage currents is coming as a future challenge in the high density CMOS based portable mobile multimedia rich applications. In this paper the standby leakage power analysis at different operating temperature for the Conventional 6T SRAM, P3 SRAM and P4 SRAM cell has been carried out. It has been observed that for 6T SRAM there is an increase in standby leakage power with increase in temperature and the gate leakage current is found to be reduced with temperature variations, but this effect of temperature variation is found to be significantly lowered in P3 and P4 SRAM cells due to p-MOS stacking. The design simulation has been performed on CMOS deep sub-micron technology node, 45nm, at VDD=0.7V and 0.8V, for n-MOS and p-MOS threshold voltages as 0.24V and 0.224V, respectively on temperature range from -250C to +1250C.