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Volume 5 Issue 4 (April 2018)

S.No. Title & Authors Page No View
1

Title : Production processes in Brewery Plant

Authors : Er. Bikash Poudel

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The paper presents the detail production process, activities involved for the production of quality beer, findings and analysis of those steps involved along with lab test of beer in one of the renowned brewery plant in Nepal. All those process and steps need to meet the specific criteria for the quality beer. The data are collected from direct observation, interviews with brew masters and detail study and observation of the processes involved in one of the top brewery plant in Nepal. Brewing, and pasteurization are the main steps involved in the production of brewery. Brewing  involves milling, mashing, lautering, boiling, cooling, fermentation and conditioning Cleaning-In-Process (CIP) and bottle washing involve before brewing. The work  resulted in finding of the following:

• The main cause of less production of beer bottles is frequent malfunctioning of leveling machine since it is not in good working condition. Whole bottling process is disturbed due to poor working of leveling machine.

• The percentage of caustic in bottle washing water is 2.77%  measuring at the end of bottling process.(at the end of the day) but the requirement if 3.3%.

• Effectiveness of the filler machine is 99.9%.

• The specific gravity of beer is 1.015

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2

Title : Rotordynamic Instability Control For Floating-Ring Bearing Supported Turbo-Shaft By Angled Oil-Injection Feedholes

Authors : Daniel Tamunodukobipi, Yong Bok Lee

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Rotordynamic instability is a performance defect common with floating-ring bearing (FRB) supported turbo-shaft. Contemporary solutions are hinged on structural modifications, which technology is saturated. Alternatively, this work presents the test-results for the effects of different feed-angles (Φ=0°−60°) on FRB rotordynamic stability behaviors across 6.0−30 krpm. The results indicate that the whirl frequency, orbit-size and sub-synchronous amplitudes are mitigated, particularly for large injection-angles. The pockets of pressure along the circumference minimize the asymmetries of pressure-fields, reduce destabilizing forces and enhance damping. However, supply-pressure must be optimized higher back-pressure at feedholes’ exits. Thus, it is concluded that angled-feedhole significantly improves FRB rotordynamic stability in high-performance turbo-systems.

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3

Title : Improved Design of Air Flow for a Two Stroke Internal Combustion Engine without Scavenging Problems to Promote Cleaner Combustion

Authors : Hari Prakash V, Madhan Gopal M M, Antony Prasanth A

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This Research Paper has successfully deleted on Author’s Request.

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4

Title : Acoustic and Flow Noise Characteristics of Duct with Expanded Part and Some Holes

Authors : Kunihiko Ishihara

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Noise from an air conditioning duct of a rail vehicle is annoying for passengers especially when the rail vehicle is in a resting state. Then the noise reduction is very important from the point of view of keeping the car room comfortable and is one of the differentiating techniques. This paper described experimental results of flow noise characteristics. The air conditioning duct has some holes to ventilate the car room. I have studied the acoustic characteristics of the flow noise of the straight duct and the bending duct previously. In this study, the flow noise characteristics generated from the air conditioning duct have been studied experimentally by using the duct with expanded part and four holes. As a result, it was clarified that the noise increasing due to expanding is about 10dB and the effect of the absorbent is 3dB ~4dB in the existing of the flow.

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5

Title : An Electromagnetic Fixed-Wing UAV Launch System Based on Long Primary Double Side Linear Induction Motor

Authors : Oussama Zemaiche

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This paper describes the basic design and simulation using ANSYS Maxwell of double side long primary linear induction motor for fix wing Unmanned Aerial Vehicle (UAV). Choices of the basic structure and dimensions are presented and the motor has been designed with an emphasis on easy assembly, high thrust, high efficiency and high power factor. The results of the simulation on ANSYS Maxwell software will be revealed and discussed. In addition, the advantages of the linear induction motor are lower losses, simple control and simpler cooling.

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6

Title : Research on a Strong Tracking GPS/SINS Deeply Integrated AUKF Filtering Method

Authors : Lin Han, Shuai Chen, Longjiang Fan

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Aiming at characteristics of Ballistic missile, the GPS/SINS deeply integrated navigation algorithm based on Strong Tracking Adaptive Unscented Kalman Filter (STAUKF) in the Launch inertial coordinates is studied in this paper. The algorithm is based on the thought of fading, by introducing suboptimal multiple fading matrix into UKF filter, perform real-time adjustment on the error covariance of predicted state adaptively, so as to achieve strong tracking of the rapidly changing state. Ballistic trajectory simulation results show that suboptimal multiple fading matrix were introduced into UKF can make better use of prior information and it has stronger tracking ability for highly maneuvering targets. The improved algorithm ensures the original UKF filtering algorithm accuracy, at the same time, the system error is shown to converge in a shorter period of time.

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7

Title : The Game Strategy of Sustainable Development of P2P Internet Loan

Authors : Zhong Ling

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P2P network lending is a new type of Internet finance model for individuals and small and micro enterprises borrowing money. It is different from traditional bank lending and has the characteristics of high flexibility and ease of application. The phenomenon of default and fraudulent operation of P2P online loans in actual financial activities has aroused great concern from the society and the government. For the sustainable development of the emerging Internet financial model, this article based on the P2P network loan model, introduced the asset breach protection measures—insurance system, P2P platform registered margin system, government central bank supervision system, and established a mathematical model to obtain the optimal game strategy.

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8

Title : Ab initio and spectroscopic study of dimethylbenzyl radicals in a corona excited supersonic expansion

Authors : Chang soon Huh

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We report the spectroscopic and ab initio and spectroscopic evidence of the 2, 3- and 2, 6-dimethylbenzyl radical in corona excitation. The electronically hot but jet-cooled 2, 3- and 2,6-dimethylbenzyl radical has been produced from precursor 1, 2, 3-trimethylbenzene seeded in large amount inert carrier gas helium by using the technique of corona excited supersonic expansion (CESE) with a pinhole-type glass nozzle. The vibronic emission spectrum of the 2, 3- and 2, 6-dimethylbenzyl radicals were recorded with a long path monochromator in the D1 → D0 electronic transition in the visible region. Ab initio calculation of the ground-state benzyl radical have been carried out with density functional method and the complete basis set model. The observed spectrum is consistent with the result of vibrational frequencies of the ab initio calculation and the benzyl radical ground state reaction mechanism through the hydrogen migration is presented. Furthermore, the ab initio calculation explains the benzyl radical generation mechanism in the excited state through the anti-bonding energy surface. By Additional help of the substitution effect of methyl substituted benzyl radicals, we could identify the jet-cooled 2, 3- and 2, 6-dimethylbenzyl radicals formed in corona discharge of 1, 2, 3-trimethylbenzene.

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9

Title : Reasoning Methods in Semantic Web

Authors : Anriette Michel Fouad Bishara, Lia Kurtanidze, Mikheil Rukhaia

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Semantic Web is a collection of different technologies, where most of them is already standardized. The main purpose of these technologies is to describe semantic content of the web, i.e. their meaning and sense, in the format understood by computers. As a consequence, computer programs will be able to use more (human) knowledge to do assigned tasks. In this paper we overview the ontology and logic layers of the semantic web stack. Although ontology languages are standardized by W3C, there are still many problems remaining, which are related to reasoning over the ontologies. On the logic layer of the semantic web stack are considered unranked languages, where function and predicate symbols do not have a fixed arity. Such languages can naturally model XML documents and operations on them. In this paper we present survey of reasoning methods over such unranked languages.

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10

Title : Assessment of groundwater volumes and quality suitability for different uses

Authors : D. Giacobone, M. Blarasin, E. Matteoda, V. Lutri, L. Maldonado, A. Cabrera, F. Bécher Quinódoz, J. Giuliano Albo

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Groundwater resources have a great potential to satisfy human needs. In each case of study, volumes and water quality are essential aspects to be evaluated. The objective of this work is to assess the hydrogeological and geochemical aspects of the unconfined aquifer of the Campus of the National University of Rio Cuarto and its surroundings to determine groundwater reserves and the groundwater quality for irrigation, cattle and human consumption. The results show that there is an important geochemical homogeneity in the studied area and all the water samples are fresh (<600 uS/cm), most of calcium bicarbonate type. All the analyzed chemical variables show low values and do not surpass the established guidelines for human consumption, irrigation and cattle uses. There is an encouraging scenario with regard to the available groundwater volume. Considering that the aquifer is made up by coarse fluvial sediments and has high hydraulic conductivity and specific porosity, the estimated Regular and Total Reserves are plentiful. Only the regular reserves are enough to supply water to the different activities in the Campus (personnel, garden irrigation and experimental tasks). Also the unconfined aquifer shows an important rate of water annual replenishment from precipitations (20-28%), a very promising situation to the maintenance of groundwater reserves.

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11

Title : Demotion of Pluto relegates the planethood status of Earth

Authors : Dipak Nath

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Planethood means the state or condition of being a Planet. Clyde.W. Tombough discovered Pluto on march13, 1930. From its discovery in 1930 until 2006, Pluto was classified as Planet. In the late 20th and early 21st century, many objects similar to Pluto were discovered in the outer solar system, notably the scattered disc object Eris in 2005, which is 27% more massive than Pluto. On august-24, 2006, the International Astronomical Union (IAU) defined what it means to be a Planet within the solar system. This definition excluded Pluto as a Planet added it as a member of the new category “Dwarf Planet” along with Eris and Ceres. There were many reasons why Pluto got demoted to dwarf planet status, one of which was that it couldn't clear its orbit of asteroids and other debris. But Earth's orbit is also crowded...too crowded for Earth to be a planet? Earth is indeed in a very crowded orbit, surrounded by tens of thousands of asteroids and other objects. The presence of so many asteroids seems like a serious problem for Earth's claim that it has cleared its neighborhood. And Earth isn't alone in this problem - Jupiter is surrounded by some 100,000 Trojan asteroids, and there's similar clutter around Mars and Neptune. Indeed, one object that Neptune has categorically failed to clear from its orbit is Pluto itself. Alan Stern, the head of NASA's New Horizons mission to Pluto and a critic of the Pluto reclassification, points out quite simply, "If Neptune had cleared its zone, Pluto wouldn't be there." Therefore if we use the definition set forth by IAU, Pluto, Neptune, Jupiter, Mars & the Earth, are not Planets. They are also “Dwarf Planet”. Now Pluto’s demotion to “Dwarf Planet” relegates the planetary status of Earth. So there is a hope that lots of astronomers are not happy with the new definition, and could vote to change the definition of planethood.

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12

Title : Chemical Composition of Mentha Longifolia Essential Oil from Albania Populations

Authors : Jonida Salihila, Aurel Nuro, Aida Dervishi, Dhimitër Peçi, Dorina Shëngjergji

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The essential oil of Mentha longifolia L. was analyzed from population of South, South-East and Central Albania. Mentha longifolia is easy to grow, with the same requirements as most mints. Found in most parts of Albania and easy to harvest, wild mint is a popular traditional medicine. Pulegon is the main compound of the plant responsible for most of its pharmacological effects followed by Menthone, Isomenthone, Menthol, 1,8-Cineole, Carvacrol, and Piperitenone. Based on the review of various studies, it can be saw that Mentha longifolia L. is a potential natural source for the development of new drugs. The areal parts of Mentha herbs were sampling in June, 2017. The air dried plant samples were subjected to European Pharmacopoeia apparatus (Clevenger type) for 4 hours to obtain Mentha essential oil. The chemical composition of the essential oils was analyzed using GC/FID technique. The oil of each Mentha longifolia L. essential oil samples were injected in a Varian 450 GC. VF-1ms capillary column (30 m x 0.33 mm x 0.25 um) were used for separation of compounds. Monoterpenes (especially oxygenated monoterpenes) were in higher percentage in Mentha longifolia essential oil for all areas. Terpenes that were found in higher percentage were: Cineole, Linalool, Menthol, Pulegon, Carvone, Piperthone, Thymol, beta-Caryophyllene. Their profile was not the same for all studied areas. Profile and leveles of Mentha longifolia L. samples from Central, South-East and South Albania was the same with other reported studies from Balkan and Mediterrean area.

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13

Title : Thermooptic coefficient and Transmitted beam profile of Rifampin

Authors : Hussain Ali Badran, Alyaa A. Jari

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The nonlinear optical properties of 3-[[(4-methyl -1-piperazinyl) imino]-methyl] –rifamycin VS (rifampin) in Tetrahydrofuran (THF) are studied by using z-scan and diffraction ring technique with continuous wave (CW) laser at a wavelength of 532 nm. The sample showed negative and large nonlinear refractive index values of the order of 10-7 cm2/W and reverse saturable absorption with high values of the nonlinear absorption coefficient of the order of 10-3 cm/W , and the thermooptic coefficients, dn/dT are found to be of the order of 10-6 K-1. The nonlinear refractive index was found to vary with the concentration. The transmitted beam profiles, the distribution of intensity corresponding to the sample positions and D- distribution of rings number of each pattern variation for the rifampin samples have been studied. These results indicate that the sample is a promising candidate for applications in nonlinear optical field.

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14

Title : Noise generated from Louver exposed to Flow and Countermeasures Effect

Authors : Kunihiko Ishihara

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This paper describes effects of configuration of the louver and the long hole on aerodynamic noise level. The aerodynamic noise is the most effective noise source of a high speed vehicle on the environmental noise and it is very important for our healthful life to reduce this kind of noise. The aerodynamic noise consists of wind noise generated from the pantagraph and the louvers. Here, the wind noise of louvers and perforated plates are measured and evaluated experimentally by using a low noise wind tunnel. As a result, the following conclusions were obtained. (1) Noise reduction of about 4 dB  is achieved by using the louver of parallelogram frame with 45degree, (2) Noise reduction of about 1dB  is achieved by doubling the number of fin, (3) To make the radius of the frame of the louver large is effective on the noise reduction, although the effect is small, (4) In perforated plate, the hole area to total area is getting small, the noise level becomes small.

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15

Title : Improved of Approximating Function Li(x)

Authors : Israfil Okumus, Ercan Celik

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Let π(x) be the prime-counting function that gives the number of primes less than or equal to x, for any positive number x and let the approximating function Li(x) denote the off set integral logarithm of x. This function is a good approximation to the number of prime numbers less than x. We propose a simple modification of Li(x) gauss prediction function for reduces of π(x)-Li(x).

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16

Title : Analytic Hierarchy Process Improvement

Authors : Ning Zheng, Guoshun Ma

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This paper introduces the analytic hierarchy process in detail and the specific operation steps. An example in the analytic hierarchy process is used as the research object. Based on the traditional analytic hierarchy process, the harmonic mean is instead of the summation method. The consistency test of the matrix replaces the consistency test of the maximum eigenvalue. The example shows that the improved AHP method is more concise than the original method and is a feasible method.

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Title : Sunt Bark (Acacia nilotica) Powder Combination Tanning for Manufacture of Upper Leather

Authors : Abdella M.H, Musa A.E, Ali S.B

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When certain polyphenols and polycarboxyl group compounds are combined with metallic salts (not including chromium) a combination tanned leather is produced with good resistance to hydrothermal shrinkage and a “chemical effect” near to chrome tanned leather. The combination of vegetable tannins with metal salts has been used for thousands of years. The shrinkage temperature of semi-metal tanned leather is much higher than expected. This is an example of synergy, when the total effect is greater than the sum of the parts. In this study, combination tanning process based on Sunt (garad) bark – Aluminum tannage for the production of upper leathers is presented.  The bark powder of Acacia nilotica  (Sunt bark) from Sudan has been utilized in the combination tanning system with aluminum. Both tanning methodologies Sunt bark followed by Aluminum (Sunt bark -Al) and Aluminum followed by Sunt bark (Al- Sunt bark) have been attempted. All combinations tanning systems resulted in leathers with shrinkage temperature above 90oC. However, Al- Sunt bark leathers tanned using 2% Al2O3; followed by 20% Sunt bark resulted in shrinkage temperature of 96oC. It is seen that combination tanning using Sunt bark (20%) followed by Aluminum (2% Al2O3) resulted in leathers with shrinkage temperature of 100oC, which is 16oC more than the control (Sunt bark tanned) leathers.  The spent tan liquor analysis shows significant reduction in COD and TDS loads compared to a conventional vegetable tannage. Sunt bark -Al combination system resulted in leathers with good organoleptic and strength properties. The work presented in this paper established the use of Sunt bark - aluminum combination tanning system as a suitable alternative for chrome-free tanning system.

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18

Title : Linkage between Corporate Governance and Financial Performance in an Emerging Economy

Authors : Md. Saiful Islam Chowdhury, Farhana Ferdous, MD. Omar Faruk

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The objective of this study is to explore the Linkage between Corporate Governance and Financial Performance in an Emerging Economy in the banking sector of Bangladesh. The data have been taken from primary sources. Data were collected from 22 listed banks on the Dhaka Stock Exchange (DSE). This data were analyzed by using different statistical tools like structural equation model (SEM) with the help of SmartPLS-3 software. It is found that some important factors like enablers that improve corporate governance, obstacles that affect corporate governance; those are the influential factors to build performance of selected bank. This study further supports the argument that when bank implement good corporate governance principles, it experiences improved financial performance. This study, with its emphasis on developing a corporate governance model, makes a significant contribution to the body of knowledge on corporate governance in emerging economies like Bangladesh.

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