IJOART Volume 5, Issue 5, May 2016 Edition


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MIL-STD-1553 BUS PROTOCOL ALGORITHMS IMPLEMENTATION ON FPGA TO REALISE SYSTEM-ON-CHIP(SOC)[]


This paper provides design approach to device “System-On-Chip (SoC)” using FPGA with MIL-STD-1553B protocols and controller. This is possible by using FPGA having MIL-STD-1553 protocols and microcontroller/processor IP cores within the SoC. The major advantage in having SoC is that the application firmware can be embedded within the SoC for further increase of processing power. The major advantages are cost reduction, physical size/ foot print reduction, increase in the processing power to handle complex algorithms and availability at a shorter notice.


EVALUATION OF ORTHOMETRIC HEIGHTS FROM GPS SURVEY USING A GEOID MODEL– A CASE STUDY FOR MADANG, PAPUA NEW GUINEA[]


Levelling, the workhorse of precise determination of orthometric heights, is expensive, time consuming and tedious. The Global Positioning System (GPS) has emerged as a successful technology in providing precise position of points on the surface of the earth over the reference ellipsoid with sub-metre level of accuracy. The heights from this are ellipsoidal heights necessitating its transformation into orthometric heights by integrating a geoid model, which provides separation (N) of the geoid with the reference ellipsoid. The EGM 2008, a global geoid model is widely employed for the purpose yielding sub-metre accuracy. In Papua New Guinea (PNG) the demand of large scale maps with one or two metre contour interval is ever increasing particularly for urban infrastructure development. Therefore it has become imperative to optimize the use of GPS in derivation of the orthometric heights with minimum leveling and the present study has been contrived in tune with this where Madang town of PNG, a fast developing town in the country, has been taken up as the study area.


Small Business Owners in Pennsylvania: A Case Study[]


African immigrant business owners create jobs and often stimulate economic growth in distressed inner-city areas, yet they continue to experience barriers obtaining financial support in the United States when trying to gain entrance into the broader economy. The objective of this multiple case study was to explore strategies African immigrant business owners used to succeed in business beyond 5 years. The conceptual framework of this study included resource-based theory, human capital theory, and disadvantage theory. Semistructured interviews were conducted with 3 African immigrant business owners in Philadelphia, Pennsylvania who had succeeded in business beyond 5 years. Thematic analysis from interviews, organizational documents, and Bureau of Labor Statistics data identified 8 emergent themes. Findings indicated that, for these 3 African immigrant business owners, education, managerial-related experience, motivation, and networking were key attributes related to small business success. Additionally, innovation, steady flow of resources, and adequate access to capital were predictive of successful businesses. This study may contribute to positive social change by providing guidance to African immigrant business owners about effective business strategies; this knowledge may help to improve the quality of life for African immigrants in the United States. Increasing the prosperity of the business community is incumbent upon the development and use of new knowledge.


Design of Human-Emissive Security Alert System for Residential Application []


The aim of this project is to design GSM based security system with feedback call capability for residential apartment. To achieve this the pyroelectric infrared radial (PIR) sensor, a transducer which has the ability to convert human body capacitance into electrical signal was used with all other discrete components built around it. The PIR sensor was used as input component which generates input signal used to drive integrated circuit components, which changes output state to energize a relay causing the device to be able to activate a feedback call. The design was successful and is capable of notifying the security personnel in less than ten seconds once an intruder is detected.


A COMPARATIVE STUDY OF FREE SPACE AND OKUMURA-HATA MODELS IN GSM SIGNAL PATH LOSS PREDICTION IN SOUTH-SOUTH NIGERIA []


One of the most fundamental tasks in Radio network planning is Radio propagation prediction. This is done to foresee the coverage of the proposed system whilst considering the practical limitations that characterize the propagation environment. As a result, many prediction models have been developed and deployed over the years. In this paper, two of such models; Okumura-Hata, and Free Space, are comparatively studied at three different locations in Ughelli, a suburban terrain of Delta state in South-South, Nigeria with the sole aim of comparing their accuracy in Path loss prediction. A netmonitor software installed in a smart phone, and a Garmin Nuvi Global Positioning System (GPS) device were used to measure the Received Signal Strength (RSS) and Distances between Base Transceiver Stations (BTS), and Mobile Station (MS) respectively. The analysis of the result showed that Okumura-Hata model is more accurate in pathloss prediction.



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