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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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Abstract :

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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Abstract :

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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Abstract :

In the present work, an attempt is made to reduce scavenging problems by developing a new model of two-stroke spark-ignition engine. This model allows flow of fresh air through intake valves positioned at the bottom of the cylinder and exit of burnt gases through exhaust ports situated at the top of cylinder. The exhaust ports are closed by the piston as it moves towards bottom dead Centre following which gasoline is injected minimizing the possibility of mixing of fuel with outgoing exhaust gases. During expansion the piston unravels the exhaust ports and the burnt gases escape to the atmosphere due to pressure difference. Due to low density at high temperatures, the exhaust gases naturally rise against the direction of gravity reducing the possibility of mixing with incoming fresh air. A comparative study of fuel distribution inside the cylinder, showed greater distribution when injection takes place against gravity than along gravity, which promotes cleaner combustion. The combustion analysis was done using Diesel-RK software and flow analysis was done using ANSYS FLUENT.

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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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Abstract :

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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Abstract :

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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Abstract :

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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Abstract :

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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Abstract :

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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Abstract :

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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Abstract :

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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