Asian Journal of Research in Computer Science http://journalajrcos.com/index.php/AJRCOS <p style="text-align: justify;"><strong>Asian Journal of Research in Computer Science (ISSN: 2581-8260 )&nbsp;</strong>aims to publish high-quality papers in all areas of 'computer science, information technology,&nbsp;and related subjects'. The journal also encourages the submission of useful reports of negative results. This is a quality controlled,&nbsp;OPEN&nbsp;peer-reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Asian Journal of Research in Computer Science 2581-8260 SOADIWA: A Service-oriented Architecture for Data Interoperability in Web Applications http://journalajrcos.com/index.php/AJRCOS/article/view/30113 <p>The realisation of Service-Oriented Architecture (SOA) to communicate data between systems running on different platforms lack an organised framework to capture the essential elements required for successful interoperability between web applications and their services. In this work, a SOA for Data Interoperability in Web Applications (SOADIWA) was designed. The architecture of SOADIWA was based on five layers, namely Web Application Layer (WAL), Quality of Service Assurance Certifier Layer (QoSACL), Web Service Layer (WSL), Visualization Input Layer (VIL) and Visualization Output Layer (VOL). In WAL, the Service Requester (SR) initiates a request for data from the Service Provider (SP) through the QoSACL to provide appropriate website via WSL for rendering of services which must be accepted, processed and returned for a particular need in VIL. The requested data is filtered in VIL for data exploration and analysis in VOL using context-sensitive visualization techniques. The purpose of QoSACL is to check and verify the claims made by the SP about its quality of service. This enabled the SR to choose the service that satisfied its needs. The implementation comprised of Java Script, Microsoft Visual Studio 2017 and NuGet packages; while the experiment was simulated on LoadUI pro application. Standard metrics such as Optimal Performance (OP) and Phased Effort Distribution (PED) were developed to test SOADIWA. These results conformed to basic web service interoperability. The work led to the integration of a host of techniques towards the creation of a novel tool that is useful in web domain using SOA approach.</p> Yusuf Lateef Oladimejia ##submission.copyrightStatement## 2019-11-22 2019-11-22 1 15 10.9734/ajrcos/2019/v4i330113 A Smart Vision Based Navigation Aid for the Visually Impaired http://journalajrcos.com/index.php/AJRCOS/article/view/30114 <p>Due to the ever increasing number of blind and visually impaired people in the world, there has been a great amount of research dedicated to the design of assistive technologies to support them. The various assistive technologies apply different techniques including laser, ultrasonic sensors and image processing. Autonomous navigation is a significant challenge for the visually impaired, it makes life uncomfortable for them and poses serious safety issues. In this paper we review the progress made so far in vision based systems and propose an approach for developing navigation aids through techniques used in other autonomous systems like self-driving vehicles. The proposed system uses a front camera to capture images and then produces commensurate guiding audio signals that allow the user freely move in their environment. An extra rear camera is included to allow the user to obtain more information about the scene. Care is taken however not to overload the user with information. The proposed method is tested both in indoor and outdoor scenes and is effective in notifying the user for any obstacles. The goal of this paper is to propose a model for and to develop subsystems for an intelligent, high performance, affordable and easy to use image based navigation aid for the visually impaired.</p> Benjamin Kommey Kumbong Herrman Ernest Ofosu Addo ##submission.copyrightStatement## 2019-11-22 2019-11-22 1 8 10.9734/ajrcos/2019/v4i330114