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27,404 Article Results

Multi-objective Optimization Based Design of High Efficiency DC-DC Switching Converters

10.11591/ijpeds.v7.i2.pp379-386
Angelo Ambrisi , Massimiliano de Magistris , Raffaele Fresa
In this paper we explore the feasibility of applying multi objective stochastic optimization algorithms to the optimal design of switching DC-DC converters, in this way allowing the direct determination of the Pareto optimal front of the problem. This approach provides the designer, at affordable computational cost, a complete optimal set of choices, and a more general insight in the objectives and parameters space, as compared to other design procedures. As simple but significant study case we consider a low power DC-DC hybrid control buck converter. Its optimal design is fully analyzed basing on a Matlab public domain implementations for the considered algorithms, the GODLIKE package implementing Genetic Algorithm (GA), Particle Swarm Optimization (PSO) and Simulated Annealing (SA). In this way, in a unique optimization environment, three different optimization approaches are easily implemented and compared. Basic assumptions for the Matlab model of the converter are briefly discussed, and the optimal design choice is validated “a-posteriori” with SPICE simulations.
Volume: 7
Issue: 2
Page: 379-386
Publish at: 2016-06-01

Polyhouse Agricultural Marketing System Using Big Data Hadoop

10.11591/ijaas.v5.i2.pp78-84
Ayesha Bhandralia , Resham Arya , S. N. Panda , Sachin Ahuja
Agriculture is to cultivate and produce crops and livestock products. Agriculture in its associated sectors is unquestionably the largest livelihood provider, in the broad areas of rural India. With the emergence of high tech agriculture farming known as Polyhouse farming came into existence. Polyhouse farming is an alternative new technique which reduces clinging on to natural procedures that are very basic needs of agriculture i.e. rainfall, temperature, humidity and geographical conditions and this result in the most advantageous use of water and land resources. Polyhouse advances to create suitable microclimates, which favour the crop production by simulation of artificial environment using latest computer assisted technology. Yet polyhouse product marketing is an uncovered area which is still neglected and there is a strong need to for an effective marketing intervention or channelization. The liberalized trade environment in general has added another dimension to the poverty of farmers and uncertainty about the future. The paper describes the long established approach of marketing concept of polyhouse agriculture. The relationship between development, marketing and accessibility in polyhouse agriculture is reviewed. We have detected various inadequate parameters, and recognized the need of an effective polyhouse marketing system which may have beneficial impact on farmers.
Volume: 5
Issue: 2
Page: 78-84
Publish at: 2016-06-01

Proximate Composition of Some Selected Browse Plants in Gombi Local Government Area, Adamawa State, Nigeria

10.11591/ijaas.v5.i2.pp72-77
D.I. Mojaba , D. Khobe , E Nelson
Twelve (12) indigenous browse plants harvested from four districts of Gombi Local Government, Adamawa State were evaluated for their proximate composition. The samples were randomly collected in the study and identified at the Forestry Department, Ministry of Agriculture, Adamawa State. The proximate composition of the collected samples was carried out at the Animal production Nutrition Laboratory of Adamawa University, Mubi. Parameters measured include dry matter (DM), crude fibre (CF), crude protein (CP), Ash (minerals). Nitrogen free extract (NFE) and ether extract (EE). Results obtained showed that DM ranged from 55.5%-80%, CF (23-68%), CP (7.88-19.25%), NFE (22.25-69.97%), EE (3.0-6.0%) and Ash (6.0-12.00%). The data obtained were used to determine the suitability of the browse plants species for ruminant animal production. Results revealed that nutrient contents in plant samples vary in composition.
Volume: 5
Issue: 2
Page: 72-77
Publish at: 2016-06-01

A Review on LSB Substitution and PVD Based Image Steganography Techniques

10.11591/ijeecs.v2.i3.pp712-719
Aditya Kumar Sahu , Gandharba Swain
There has been a tremendous growth in Information and Communication technologies during the last decade. Internet has become the dominant media for data communication. But the secrecy of the data is to be taken care. Steganography is a technique for achieving secrecy for the data communicated in Internet. This paper presents a review of the steganography techniques based on least significant bit (LSB) substitution and pixel value differencing (PVD). The various techniques proposed in the literature are discussed and possible comparison is done along with their respective merits. The comparison parameters considered are, (i) hiding capacity, (ii) distortion measure, (iii) security, and (iv) computational complexity.
Volume: 2
Issue: 3
Page: 712-719
Publish at: 2016-06-01

A Study on Big Data Techniques and Applications

10.11591/ijaas.v5.i2.pp101-108
K. Radha , B. Thirumala Rao
We are living in on-Demand Digital Universe with data spread by users and organizations at a very high rate. This data is categorized as Big Data because of its Variety, Velocity, Veracity and Volume. This data is again classified into unstructured, semi-structured and structured. Large datasets require special processing systems; it is a unique challenge for academicians and researchers. Map Reduce jobs use efficient data processing techniques which are applied in every phases of Map Reduce such as Mapping, Combining, Shuffling, Indexing, Grouping and Reducing. Big Data has essential characteristics as follows Variety, Volume and Velocity, Viscosity, Virality. Big Data is one of the current and future research frontiers. In many areas Big Data is changed such as public administration, scientific research, business, The Financial Services Industry, Automotive Industry, Supply Chain, Logistics, and Industrial Engineering, Retail, Entertainment, etc. Other Big Data applications are exist in atmospheric science, astronomy, medicine, biologic, biogeochemistry, genomics and interdisciplinary and complex researches.  This paper is presents the Essential Characteristics of Big Data Applications and State of-the-art tools and techniques to handle data-intensive applications and also building index for web pages available online and see how Map and Reduce functions can be executed by considering input as a set of documents. 
Volume: 5
Issue: 2
Page: 101-108
Publish at: 2016-06-01

Study on End-wall Slope Stability of Surface Coal Mine under the Condition of Combined Open-pit Mining with Underground Mining

10.11591/ijaas.v5.i2.pp65-71
Peng Hongge , Cai Qingxiang , Zhou Wei , Shu Jisen
With the deepening of surface coal mine, the application of combined surface mining with underground mining is increased now. According to the influence analysis of underground mining on surface coal mine end-wall slope, the thin plate model of mined slope was proposed with distortion and stress distribution of the girder studied. Considering the practice of combined surface mining with underground mining, the modified method was put forward. Based on the roof breaking law of mined slope, the minimum width of protecting coal pillar was elicited. Subsequently this paper took the combined mining practice of Anjialing surface mine as example to study the subsidence law of roof and the influence of underground mining to surface mine slope. The research conclusion indicates that under the condition of combined mining the deformation and subsidence of overlying strata are obvious with a clear lag time, and the ceiling distortion evokes distortion of mined slope, which can be used as the theory sustainment to stabilization of mined slope under combined surface mining with underground mining.
Volume: 5
Issue: 2
Page: 65-71
Publish at: 2016-06-01

Graphical Password Using Captcha

10.11591/ijaas.v5.i2.pp94-100
Y.Chandra Sekhar Reddy , M.Venkateswara Rao , M. Kameswara Rao , C.V. Phaneendra Kumar , A. Anil Sai
In this 21st century one of the main issue to tackle was Cyber Security attack. We have numerous authentication processes like two key factor passwords, graphical passwords and many other. Text based passwords are prone to many attacks like dictionary attacks. In this paper, we have implemented a new authentication method namely; a family of graphical passwords built on Captcha technology. As graphical password addresses many security problems like online guessing attacks, relay attacks etc. Captcha is used to distinguish humans and bots. So, we use images with captcha’s as one of the authentication step along with normal alpha-numeric password. It also overcome the problems of pass points in graphical password systems.
Volume: 5
Issue: 2
Page: 94-100
Publish at: 2016-06-01

Study of the Trilinear Neighborhood Model of Process of Formation of Temperature’s Coiling Hot-rolled Strip

10.11591/ijece.v6i3.pp1371-1374
A.M. Shmyrin , A.G. Yurtsev , A.M. Korneev , L.S. Abdullakh
The paper considers trilinear neighborhood model of process of formation of temperature’s coiling hot-rolled strip, where the parameters are the state, control and information. The methods of determining the composition of extremums of the general parametric operation are presented. Extremums’ condition for the existence, which has been tested on a concrete example, is obtained. The assumption about the area in which it is impossible to say with certainty about the system’s stability is stated. The hypothesis about the condition of the loss of the position of stable equilibrium of the system and the transition to a new state.
Volume: 6
Issue: 3
Page: 1371-1374
Publish at: 2016-06-01

A Physiologic Model for the Problem of Blood Flow through Diseased Blood Vessels

10.11591/ijaas.v5.i2.pp58-64
Sapna Ratan Shah , S. U. Siddiqui
This study focuses on the behavior of blood flow through diseased artery in the presence of porous effects. The laminar, incompressible, fully developed, non-Newtonian in an artery having axially non-symmetric but radially symmetric stenosis is numerically studied. Here blood is represented as Herschel-Bulkley fluid model and flow model is shown by the Navier-Stokes and the continuity equations. Using appropriate boundary conditions, numerical expression for volumetric flow rate, pressure drop and wall shear stress have been derived. The expressions are computed numerically and results are presented graphically. The effects of porous parameter on wall shear stress, stenosis length, stenosis size and stenosis shape parameter are discussed. The wall shear stress increases as the porous parameter, stenosis size and stenosis length increases, but as the stenosis shape parameter increases, the wall shear stress decreases. The work shows that the results obtained from the porous wall model are significantly different from those obtained by the rigid wall model.
Volume: 5
Issue: 2
Page: 58-64
Publish at: 2016-06-01

Weighted Rank Query Search over Cloud Data Storage

10.11591/ijaas.v5.i2.pp85-93
K.Naga Gopi , K. Thirupathi Rao , K. Chaitanya , R. Venkatesh
This paper describes and fixes the problem of multi-keyword rated look for over secured reasoning information (MRSE) while preserving strict system sensible comfort in the reasoning processing model. Information proprietors are roused to delegate their convoluted data administration frameworks from neighborhood destinations to the business open thinking for extraordinary flexibility and monetary advantages. Anyway, for safeguarding data solace, delicate data must be secured before outsourcing, which obsoletes traditional data use in light of plaintext essential word and key expression search for. To better bolster clients in their long haul data missions on the Web, Google stay informed concerning their worries and mouse snaps while seeking on the web. In this paper, we think about the issue of arranging a client's conventional concerns into gatherings in an intense and electronic style. In a flash deciding inquiry gatherings is useful for various distinctive online search for motor parts and projects, for example, question recommendations, result position, question alteration, sessionization, and community explore for. In our method, we depart past strategies to depend on literary resemblance or moment points of confinement, and we suggest a more compelling  technique that controls search for question logs.
Volume: 5
Issue: 2
Page: 85-93
Publish at: 2016-06-01

Prospective Electromechanical Control Systems of Industrial Manipulator Efforts

10.11591/ijpeds.v7.i2.pp416-421
Nikolay Alexandrovich Sukhenko , Georgiy Yakovlevich Pyatibratov , Anzhela Alexandrovna Danshina , Lermont Lyevikovich Altunyan
The current electric drive of industrial manipulators is implemented on the principle of speed control and position of the actuator, often do not provide actuator motion as consistent with required process specifications. Taking into account the disadvantages of existing control systems the new approach to control systems engineering and implementation of industrial manipulators electric drives using force balancing systems of actuator efforts control was proposed. Application properties and implementation of efforts control systems inside springy gears and mechanisms of industrial manipulators have been studied. The efficient structure of electromechanical system, which provides the desired balance the transfer object weight and dampening of manipulators mechanical gears springy oscillations is proved. The studies were performed on mathematical modeling and the prototype of industrial manipulators, which confirmed the performance of control system potential structure application and synthesized effort regulator which provide the required performance factor. The potential electromechanical force balancing systems is ably to increase industrial manipulators performance quality, provides transfer and the desired positioning of load directly by operator. Possibility of efficient application the scope increase of industrial manipulators using the potential force balancing systems of efforts control is defined. 
Volume: 7
Issue: 2
Page: 416-421
Publish at: 2016-06-01

Design Approach To High Voltage High Power Steam-Turbine Driven Alternator

10.11591/ijpeds.v7.i2.pp322-327
Pritish Kumar Ghosh , Alok Kumar Shrivastav , Pradip Kumar Sadhu , Amarnath Sanyal
The paper deals with the design methodology of high voltage high power alternators driven by steam turbines. These alternators run at a high speed of 3000 rpm in most part of the world (at 3600 rpm in USA) and are of cylindrical pole construction. The design procedure suggested in the text-books of design does not well-suit for large alternators of modern time. Modern high power alternators are designed with a low value of SCR to reduce the size, inertia and cost of the rotor. The diameter is limited by the consideration of centrifugal stresses. The no.of stator slots are determined by the no. of turns. The ventilating circuit has to be designed for hydrogen as coolant and in addition with water flowing through hollow conductors, if required. The data for the design variables and the design constraints are quite different from those for small power ratings. The materials to be chosen must be of very high quality. The computer programme has been chalked out and the case-study has been conducted keeping all these points in view.
Volume: 7
Issue: 2
Page: 322-327
Publish at: 2016-06-01

Intention and Usage of Computer Based Information Systems in Primary Health Center

10.11591/ijere.v5i2.4529
Hosizah Hosizah , Kuntoro Kuntoro , Hari Basuki
The computer-based information system (CBIS) is adopted by almost all of in health care setting, including the primary health center in East Java Province Indonesia. Some of softwares available were SIMPUS, SIMPUSTRONIK, SIKDA Generik, e-puskesmas, etc. Unfortunately they were most of the primary health center did not successfully implemented. This study applied the Unified Theory of Acceptance and Use of Technology (UTAUT) to assess intention and usage of CBIS in East Java. It was a cross-sectional survey, conducted on February-Maret 2015. A total 30 of user CBIS were identified and questioners were distributed which 100% completed. The user’s CBIS intention was significantly influenced by performance expectancy, effort expectancy and social influence. CBIS usage was significantly influenced by user’s intention and facilitating conditions. UTAUT results indicated that the facilitating conditions have a major impact to use of CBIS in primary health center. The results of this study can be helpful to the East Java provincial Health Office to adjust their program strategies and tactic for providing user’s CBIS facilities in order to implement CBIS successfully.
Volume: 5
Issue: 2
Page: 113-118
Publish at: 2016-06-01

Predictive Control for Reduced Structure Multilevel Converters: Experimenting on a Seven Level Packed U-Cell

10.11591/ijpeds.v7.i2.pp568-582
Adel Nazemi , Omid Salari , Mohammad Tavakoli Bina , Masoud Kazemi , Bahman Eskandari
Recently, a branch of multilevel converters is emerged, in which their ‘reduced structure’ topologies use lower number of devices compared to the available topologies. To get a cost efficient converter, lower number of components as well as high quality waveforms, multilevel converters with a ‘reduced structure’ (MCRS) are suitable for high/medium power systems. Also, utilizing the fast microprocessors available today, applications of predictive control in power converters are of very powerful and attractive alternatives to classical controllers. This paper proposes a finite control set model-based predictive control (FCS-MPC) for load current regulation and capacitor voltage balancing for a typical MCRS. A case study considered, three-phase seven level packed U-cell (PUC), which is among reduced structure multilevel converters. A discrete model of the system is derived, and a predictive model-based control is developed according to this model in order to predict the future behavior of the system for all possible switching states; then, the switching state that optimized the cost function is selected. The feasibility of the proposed FCS-MPC strategy for a seven level PUC is evaluated based on simulations with MATLAB/ SIMULINK. Moreover, experimental validation of the proposed control system on a 5 kVA PUC is examined through DSP implementation.
Volume: 7
Issue: 2
Page: 568-582
Publish at: 2016-06-01

The Effect of Leadership, Organizational Culture, Emotional Intellegence, and Job Satisfaction on Performance

10.11591/ijere.v5i2.4534
Muhammad Ilyas , Tamrin Abdullah
This Researchaims to study the influence of Leadership, Organizational Culture, Emotional Quotation, and Job Satisfaction to Teacher Performance of Senior High School at Palopo Municipality South Sulawesi. Samplestudy involving 78 Teachers.The results are: (1) Leadership directly effects teacher performance (2)Emotional quotation directly influence teacher performance, (3) Job Satisfaction directly effects teacher performance, (4) Leadership directly effects job satisfaction, (5) Organizational Culture directly effects job satisfaction, (6) Emotional Quotattion directly effects job satisfaction.Based on this research, the factors of Leadership, Organizational Culture, Emotional Quotation, and Job Satisfaction to Teacher Performance should be developed by Central and Local Governmenteither Palopo or South Sulawesi.
Volume: 5
Issue: 2
Page: 158-164
Publish at: 2016-06-01
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