Global Journal of Research In Engineering 

About: Global Journal of Research In Engineering is an academic journal published by Global Journals. The journal publishes majorly in the area(s): Electric power system & Microstrip antenna. It has an ISSN identifier of 0975-5861. Over the lifetime, 1164 publications have been published receiving 4057 citations.

The Use of Ontologies in Requirements Engineering

Abstract: - With the advent of the Semantic Web and the technologies for its realization, the possibilities for applying ontologies as a means to define the information and knowledge semantics become more and more accepted in different domains. The nature of requirements engineering involves capturing knowledge from diverse sources, including many stakeholders with their own interests and points of view. There are, therefore, many potential uses of ontologies in Requirements Engineering (RE). The purpose of this paper is to comprehensively review and present these uses. The main contribution is the classification of approaches that include ontologies within RE, with the aim of clarifying the way in which traditional RE techniques can benefit from them. Furthermore, future trends are identified. Keywords- Requirem ents Engineering, Ontologies, Fram ework I. I NTRODUCTION ntology can be defined as a specification of a conceptualization [1]. More precisely, ontology is an explicit formal specification of how to represent the entities that exist in a given dom ain of interest and the relationships that hold am ong them [2]. In general, for an ontology to be useful, it m ust represent a shared, agreed upon conceptualization.Ontologies have been used in many contexts and for m any purposes throughout the years due to, principally, the advent of the Sem antic Web [3]. Recently, the use of ontologies in software engineering has gained popularity for two m ain reasons: (i) they facilitate the sem antic interoperability and (ii) they facilitate machine reasoning. Researchers have so far proposed m any different synergies between software engineering and ontologies [4]. For example, ontologies are proposed to be used in requirements engineering [5], software im plem entation [6], and software maintenance [7] [8].There is an increasing am ount of research devoted to utilizing ontologies in software engineering, and Requirem ents Engineering in particular. Thus, the m ain objective of this paper is to further examine this trend. The remainder of the paper is structured as follows: Section 2 presents the m ain concepts related to Requirements Engineering and Ontological Engineering. Section 3 analyzes the benefits of applying ontologies in Requirem ents Engineering and presents a fram ework for integrating ontologies in Requirements ____________________

Total Productive Maintenance: A Case Study in Manufacturing Industry

Abstract: The purpose of this paper is to evaluate the contributions of total productive maintenance (TPM) initiatives towards improving manufacturing performance in Ethiopian malt manufacturing industry. The correlations between various TPM implementation dimensions and manufacturing performance improvements have been evaluated and validated by employing overall equipment effectiveness (OEE) in boiler plant. The research focuses upon the significant contributions of TPM implementation success factors like top management leadership and involvement, traditional maintenance practices and holistic TPM implementation initiatives, towards affecting improvements in manufacturing performance in the Ethiopian industry. The study establishes that focused TPM implementation over a reasonable time period can strategically contribute towards realization of significant manufacturing performance enhancements. The study highlights the strong potential of TPM implementation initiatives in affecting organizational performance improvements. The achievements of Ethiopian manufacturing organizations through proactive TPM initiatives have been evaluated and critical TPM success factors identified for enhancing the effectiveness of TPM implementation programs in the Ethiopian context.

Assembly Line Balancing: A Review of Developments and Trends in Approach to Industrial Application

Abstract: Assembly line balancing is to know how tasks are to be assigned to workstations, so that the predetermined goal is achieved. Minimization of the number of workstations and maximization of the production rate are the most common goals. This paper presents the reviews of different works in the area of assembly line balancing and tries to find out latest developments and trends available in industries in order to minimize the total equipment cost and number of workstations.

A Compact Microstrip Patch Antenna for Wireless Communication

Abstract: - A single feed compact square microstrip antenna is proposed in this paper. Two L slits are introduced on the right edge of the patch to study the effect of the slit on radiation behavior with respect to a conventional microstrip patch. An extensive analysis of the return loss, radiation pattern and efficiency of the proposed antenna is shown in this paper. For the optimize value of the slit parameters antenna resonant frequencies are obtained at 2.16, 2.68,3.22&4.37 GHz with corresponding bandwidth 11.02 MHz, 13.07 MHz, 35.86 MHz , 48.56 MHz and return loss of about -23.4,-15.2,-30.6&-20.3 dB respectively. For the lowest esonant frequency (2.16 GHz) the size of the antenna has been reduced by 71.14 % when compared to aconventional rectangular microstrip patch. Thecharacteristics of the designed structure are nvestigated by using MoM based electromagnetic solver, IE3D. The simple configuration, low profile nature, reduced size and quad band characteristics of the proposed antenna makes it suitable to operate in the frequency ranges of 2.165-2.176, 2.673-2.686, 3.208-3.244 and 4.343-4.392 GHz.

Kinematics, Localization and Control of Differential Drive Mobile Robot

Abstract: The present work focuses on Kinematics, Localization and closed loop motion control of a differential drive mobile robot which is capable of navigating to a desired goal location in an obstacle free static indoor environment. Two trajectory planning approaches are made (i) the robot is rotated to eliminate orientation error and then translate to overcome distance error (ii) Both rotational and translational motion is given to the robot to overcome orientation and distance error simultaneously. Localization is estimated by integrating the robot movement in a fixed sampling frequency. The control law is based on kinematics model which provides updated reference speed to the high frequency PID control of DC motor. Stability of proposed control law is validated by Lyapunov Criterion. Both experimental and simulation results confirm the effectiveness of the achieved control algorithms and their efficient implementation on a two wheeled differential drive mobile robot using an 8-bit microcontroller.