Electrical machines like DC motors, brushless DC motors, permanent magnet DC motors are being controlled with power electronics converters. The control has become precise with invention of Micro Controllers and power devices like IGBT, Power MOSFET. In this paper the attempt is made to simulate a speed control of separately excited DC motor with PID and fuzzy controllers. The aim of development of this paper is towards providing efficient method to control speed of DC motor using analog Controller. With the availability of MATLAB/SIMULINK, Fuzzy Controller for comprehensive study of modeling analysis and speed control design methods has been demonstrated.

Due to inadequate understanding in physics, mathematicians have made misleading erroneous claims in general relativity that result in awarding three times the Fields Medal in 1982 to S. T. Yau, and 1990 to E. Witten, and the 2011 Shaw Prize to D. Christodoulou. It is pointed out that they failed to discover that there are no bounded dynamic solutions for the Einstein equation as Gullstrand suspected. Thus, the existence of bounded dynamic solutions was implicitly, but incorrectly assumed. This error currently prevents the necessary rectification of general relativity that leads to the unification of gravitation and electromagnetism. Also, similar errors have been made by D. Hilbert and M. Atiyah.

In this paper, equivalent conditions for various generalized inverses of a con-s-k-EPr matrix to be con-s-k-EPr are determined. Generalized inverses belonging to the sets A{1,2}, A{1,2,3} and A{1,2,4} of a con-s-k-EPr matrix A are characterized.

This paper represents the difference between conventional process and modified process in pyrolysis technology. In this experiment it was tried to lessen the fuel cost and energy consumption using a parabolic solar collector, some side glasses and some magnifying glasses to concentrate sun beams and magnify the solar intensity for heating up the opaque reactor. The energy consumption in the conventional process was obtained as 9900000 J. The energy consumption obtained in case of modified pyrolysis process using solar energy was 7290000 J. Hence, the energy consumption was lessened by modified process by 26% than the conventional process. Here physical analysis of obtained oil has also been shown to determine the possibility of using it in diesel engine.

The controversy over the relationship between the financial and real economic sphere was ambiguous. Many studies showed a positive relationship between these two spheres whereas others presented the perfectly opposed thesis. On the basis of data relating to 11 MENA countries, observed during the period 1995-2011 and by using the GMM method of the dynamic panel, the result showed that there is a positive relation between the financial development and economic growth. This relationship and more intense for the role of the MENA financial system.

In this paper, I suggest a cognitive perspective on teaching English vocabulary as a foreign language in Iran. The discussion about vocabulary and its teaching and learning is one of the main issues in EFL / ESL teaching and learning research. The present study is going to survey some different ways for teaching English vocabularies. This paper refers to cognitive linguistic approaches to linguistic categories as research methodology. Thus, the aim of this study is to see if cognitive concepts played any significant role in word guessing. In recent years, the concept of linguistic categories has been used to account for the polysemous nature of individual words, morphemes, parts of speech, and even intonation patterns (Littlemore, 2009, P. 41). Based on cognitive linguistics (henceforth CL) various concepts of a word activate within a radial category, and those concepts are related through processes like categorization, prototype, metonymy, metaphor.

Cardiovascular diseases are the most common cause of death and disability in both developed and developing countries. This is attributed to the stress, high incidence of hypertension and the steep rise in the metabolic parameters like blood sugars, cholesterol. Studies on the prevalence of these risk factors especially in the younger age group are warranted to study the trend and to institute guidelines for periodicity of monitoring and management. Justifying the need for routine health screening for cardiometabolic risks in young urban asymptomatic healthy individuals is the main aim of our study. Primary prevention seeks to prevent new onset atherosclerotic cardiovascular diseases (ASCVD).

Petroleum oil which is limited due to its reserve capacity is the prime source of fuel in the world as well as Bangladesh. The concerning depletion rate of Petroleum oil leads to go for alternative fuels. T. bellirica (bahera) biodiesel is a sustainable alternative fuel and is eco-friendly though the extraction is costly. Biomass is collected from Bangladeshi forest and oil is extracted from kernel containing of about 40% oil. The oil is extracted by the solvent extraction process using soxhlet apparatus. It has been found that the oil contains free fatty acid of about 0.87% which is turned into biodiesel by the transesterificationl by reacting methanol with lipid oil in the presence of base catalyst sodium hydroxide. The physiochemical properties of Bahera Methyl Ester (BME) biodiesel are investigated with the various experimental processes. The different physiochemical properties include density, kinematic viscosity, cetane number, calorific value, flash and fire point, cloud point, pour point, acid value, elemental analysis and boiling range. The results show that all properties are compatible with standard values of other biodiesels. The investigation of different performance parameters such as efficiency, BSFC, the temperature variation of the exhaust gas were observed for further competence of T. bellirica biodiesel. All those investigation stands T. bellirica as a potential source of biodiesel.

In the last few years UAVs systems have become relevant for many military applications including non military security work such as surveillance of pipelines. An autonomous UAVis often preferred for those missions that are dull, dirty or dangerous for manned aircraft. It has the ability to hover and it has free band GPS direction and tilt sensors for smooth navigation. There is no person on board to control the aircraft. Due to the advancement in satellite receiver tracking systems, an integrated system employing latest tracking techniques using satellite Receiver in the form of GPS is integrated with this vehicle. The data of GPS is transferred to the vehicle wirelessly with the help of Zigbee transceiver module. The GPS has made navigation systems practical for a number of land-vehicle navigation applications. In this paper we have devised an algorithm and hardware implementation scheme to transfer the GPS values from the PAV to the ground station wirelessly to control its aerial navigation.

A compact single feed rectangular microstrip patch antenna using dielectric substrate 4.2, loss tangent .0012 and having substrate height of 1.6 is used. The compact antenna of dimension (14mm X 18.6mm X 1.6mm) is used and analyzed on MoM based simulating software IE3D. A probe of different radius has been taken to improve the Bandwidth of the proposed structure. Simulation results show that antenna can realize wide band characteristics and single band of 4.148 GHz (impedance bandwidth of 76.53%) has been achieved.