VOLUME 4, ISSUE 12, DECEMBER 2017

Abstract: We show the emergence of surface Non-Hermitian boundary terms that appear in an extended form of the quantum Ehrenfest theorem and are crucial in the calculation of optical matrix elements that govern the Optical Transitions in semiconductors, e.g. solar cells. Their inevitable existence, strongly related to the boundary conditions of a given quantum mechanical problem, is far-reaching in the sense that they play a dramatic role in the dynamics of solar absorption and the corresponding optical transitions that follow. Processes like optical transitions in localized and delocalized states and probabilities of intermolecular transitions can be investigated through this generalized off-diagonal Ehrenfest theorem, employed in the present work in the form of various physical examples. As a byproduct, an explicit demonstration of bulk-boundary correspondence is shown, as the extended Ehrenfest theorem can be separated into bulk and surface contributions, each behaving separately from the other, but at the end collaborating to give the correct time-derivative of the desired optical element. An additional use is speculated in the case of topological materials.

Keywords: Non-Hermiticity, Ehrenfest Theorem, Optical transitions, solar cells.

Abstract: Viscoelastic materials are largely used as a means to provide damping to structures, thus mitigating resonant vibration responses. The demand for silent machine operation in any of the organization is prime need in today's environmentally conscious world. Now a days,the vibration causes rapid wear of machine parts such as bearings and gears. Most common causes of machine vibration is wear,looseness,misalignment /shaft runout,imbalance then need of the day is producing noiseless and vibration free devices. Unwanted vibrations may cause loosening of parts from the machine. Because of improper design or material distribution, the wheels of locomotive can leave the track due to excessive vibration which results in accident or heavy loss. Sometimes because of heavy vibrations proper readings of instrument cannot be taken. Also some time machine will be destroys but some time vibration can be used for useful purposes such as vibration testing equipment's, vibratory conveyors, hoppers, and comparators. Vibration is found to be very fruitful in mechanical workshops such as improving the efficiency of machining, casting, forging and welding techniques. The transfer of noise can also be reduced by decoupling the components in such a way that the noise path is interrupted. This can be achieved by adding noise reducing treatments to the structure such as elastic elements, masses, local shielding or damping layers. In the present investigation, the use of viscoelastic damping layers as a noise reducing measure in rotating machinery is considered. Here in this investigation the result obtained will give frequency value in random manner and the use of testing hypothesis will show us that vibrations are really reduced or not.

Keywords: Fast Fourier Transform analyser( FFT), T-TEST(Statistical Test), Viscoelastic Material, Vibration.

Abstract: The current health care landscape desired efficiency and patient satisfaction for optimal performance .The outpatient of most clinics in developing countries are faced with plethora of issues. These include: overtime for doctors and nurses during clinic sessions ,long waiting time for patients, and peak workloads for counter personnel. The quality of health care delivery has been threaten by overtime and peak work load. This paper focuses on developing a system to improve upon the efficiency and quality of delivering a web based appointment system to reduce waiting time. In this paper, a patient appointment and scheduling system is designed using Angular JS for the frontend, Ajax framework for handling client-server request and Sqlite3 and MYSQL for the backend.

Keywords:

Keywords: Patient, Appointment, Scheduling, Angular JS.

Abstract: Surfactants are the compounds which reduce the surface tension between two liquids or between solid and liquid such as detergents, emulsions, wetting agents etc.There are different types of surfactants such as anionic, cationic, zwitterionic, non-ionic. Aionic Surfactants such as sulfate, phosphate, sulfonate and carboxylates. Alkyl sulfates includes Sodium Dodecyl Sulfate(SDS), Sodium Lauryl Sufate(SLS) etc.Anionic surfactants are potentially dangerous environmental pollutants due to their high-volume use in laundry and cleaning products ,they are omnipresent water contaminants . The aim of the research work is to investigate the optimized conditions for removal of anionic surfactants from domestic waste water using acidified saw dust. The initial concentration of anionic surfactants in domestic waste water is 20 ppm. After the sample is treated with acidified sawdust the anionic surfactants concentration is estimated by solvent extraction by using as solvent and Acridine orange as indicator and at 467 nm in UVSpectrophotometr.The optimum conditions for removal of anionic surfactants were Time of 90min, Adsorbent dosage of 5%(W/V), pH-7 and at 25?C temperature obtained. From the obtained optimal conditions, the removal efficiency was 70% and it was improved to 90% using chemically Acidified sawdust.Column Chromatography and their kinetics were also studied. In Column,Chromatographic studies the sample is feed to column in batch process. For every 10 min the sample is collected and concentration of Anionic Surfactants is estimated by solvent extraction method the maximum % Removal of Anionic Surfactants is obtained at 45min of 90%, and their kinetics were estimated pseudo second order is best for the process the correlation coefficient is 0.99.

Keywords:

Keywords: Surfactants, Optimization, Acidified sawdust, Column Chromatography, Kinetics.

Abstract: The municipal solid waste landfill in Bahrain (Askar landfill) reached its end use capacity by 2016; however it's still operating and receiving municipal wastes. This research aims to find out an alternative site for the existing landfill to be used during the current period and for near future. Five landfill alternatives located next to Askar, and eleven decision criteria have been proposed. The study applies two analytical approaches to establish the best landfill. The adopted approaches are Fuzzy Set analysis and Analytical Hierarchal Process analysis; both approaches are based on multi-criteria decision. The results for both methodologies are almost the same as the ranking of the five alternatives for both methodologies are similar with slight difference in landfill positions 3 and 4, where the best alternative is found to be landfill (3), which is located below the existing landfill at Askar.

Keywords: Landfill site, Municipal Solid Waste, Multi-Criteria Analysis, Fuzzy Set Analysis, and Analytical Hierarchal Process.

Abstract: The paper begins with a brief account of classical theory of radiation and its failure to explain black body radiation. It is followed by the introduction of Quantum Theory of radiation by Max Planck. The dual nature of matter by de Broglie has been extensively dealt with. The uncertainty principle of Heisenberg has been critically discussed by many eminent authors who finally concluded it as one of the unavoidable mysteries of nature. As a picture speaks thousand words and as face is the index of the mind, the author has added pictures of eminent physicists at appropriate places. The subject matter of the paper will form a good text for any graduate students of Physics.

Keywords: Classical theory, Dual nature, Photon, Planck's constant, Quantum Theory, Schrodinger equation, Ultraviolet catastrophe, Uncertainty principle, Wave mechanics.

Abstract: Teaching and learning indigenous languages using technology has been a very poorly addressed topic, there are only a few tools that exist in this regard, despite the efforts that have been made to preserve and strengthen the Mayan culture, mainly in the State of Yucatan, Mexico. This paper describes the development of an educational software designed to assist in the learning of the Mayan language in an autodidact and interactive way, through a mobile application that incorporates text, image and audio, with vocabulary, grammar and pronunciation activities. The objective of this work is to describe a methodology to develop educational mobile applications incorporating an element of gamification: history. With this new tool is intended to teach Mayan as a second language at an early age, since humans beings acquire their most significant and transcendent knowledge during childhood.

Keywords: Educational Software, Mayan Language, Mobile Application, Gamification.

Abstract: Automotive industry uses stainless steels for place where needed corrosion resistance and magnesium alloys to reduce weight of chassis. High mechanical properties of these materials are reasons for preference however low formability of these materials in the ambient temperature creates manufacturing problems. In this study, enhancement of bending ability of a stainless steel and a magnesium alloy by local heating was investigated. The specimens were bent in V-bending die by using a servo-press at room temperature. Load and deformation rate were determined during forming process. Final shapes were measured by Coordinate Measuring Machine (CMM). Same procedures were conducted with locally heating (heating the region of deformation) and the results were compared with cold forming. It was observed that locally heating the bending area was adequate to give form the workpiece and this result was verified with finite element modelling.

Keywords: Locally Heating, Formability, Stainless Steel, Magnesium Alloy, Finite Element Modelling.

Abstract: In this paper we introduced a new approach to solve fractional order Riccati differential equation that called Adomian Decomposition Method- Restrictive Padé (ADM-RP) which is anew fast and efficient method that approximate the series solution given by ADM to a fraction function called Restrictive Padé approximation using mathematica package the solution by ADM-RP gives better solution.

Keywords: ADM- Restrictive Padé- Fractional Differential Equation- Riccati Differential Equation

Abstract: The objective of this research is to experimentally investigate the performance and drying kinetics of turmeric under three different conditions: solar drying with a solar air collector (SAC) in mixed mode, solar drying without a SAC in direct mode, and open sun drying. The study aims to evaluate the moisture reduction and drying time required for each condition. The experimental results demonstrate that a moisture reduction from 86% to 4% (wet basis) can be achieved within 8 hours using a solar dryer with a SAC. The Wang and Singh model exhibited the best fit for the thin-layer drying kinetics, showing the highest coefficient of determination (R2) value and the lowest chi-square (χ2) and root mean square error (RMSE) values. The model constant was determined through regression analysis. Comparing the drying performance, it was observed that drying turmeric in a solar dryer with a SAC resulted in effective drying time and better overall dryer performance compared to drying without the use of a SAC. This research contributes to understanding the drying behavior and performance of turmeric under different drying conditions. The findings highlight the advantages of solar drying with a SAC in terms of drying time and efficiency, offering a sustainable solution for turmeric drying in the region.

Keywords: Turmeric; NER; Direct mode; Mixed mode; Thin layer drying; Solar air collector.