Browsing by Author "Tadesse, Yonas"

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    Architecture for Context Management and Context-Aware Service Delivery
    (Addis Ababa University, 2014-05-30) Tadesse, Yonas; Ejigu, Dejene (PhD)
    emergence of various technological resources in the computer industry has shown its advancement in recent years. It provides computers the advantage of high processing capability with reduced physical size options and small size wearable appliances along with wireless communication technologies have emerged. This, in turn, led to a new computing paradigm called pervasive or ubiquitous computing. Pervasive computing aims at embedding such resources into the environment to ease service delivery while reducing the amount of user effort and attention. It helps to minimize user distraction providing context aware services. Thus, it takes context information and context management at its forefront to achieve its goal, by analyzing and processing any relevant data about a given entity to arrive at a decision. In this study, generic context aware service management architecture is proposed to support and enhance the context management starting from context acquisition to its final delivery of services. A way of resource handling, context acquisition, context management, service delivery and security are provided in the architecture. The context management module processes the context reasoning and context decision considering rules and historical context information. A way of context representation and model using ontological modeling approach is provided to enrich context management. To evaluate usability, applicability, reusability and extensibility of the system, the study considered scenarios in a smart campus which require a one card identification system. With the proposed architecture at hand, a one card system in a university setting is modeled using the proposed context modeling approach to extend its functionality beyond its traditional counterpart. Unlike the traditional way, which uses a barcode reader to handle individual cards, it considers context information to perform identification. Functionalities of components in the proposed architecture are also evaluated using implementation of scenarios like notification services for service areas in the domain. Technologies like RFID and Bluetooth are exploited in the implementation to support context acquisition and resource management. The study enhances mechanisms for resource discovery, context management and pervasive service deliveries. It proves the use of the proposed architecture for application in university setting and other related domains while retaining necessary functionalities. Also, security using log management method is offered as a means of security in pervasive computing. Key words: Pervasive/Ubiquitous Computing, Context, Context awareness, Ontology, Smart Campus, RFID
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    Architecture for Context Management and Context-Aware Service Delivery
    (Addis Ababa University, 5/30/2014) Tadesse, Yonas; Ejigu, Dejene (PhD)
    emergence of various technological resources in the computer industry has shown its advancement in recent years. It provides computers the advantage of high processing capability with reduced physical size options and small size wearable appliances along with wireless communication technologies have emerged. This, in turn, led to a new computing paradigm called pervasive or ubiquitous computing. Pervasive computing aims at embedding such resources into the environment to ease service delivery while reducing the amount of user effort and attention. It helps to minimize user distraction providing context aware services. Thus, it takes context information and context management at its forefront to achieve its goal, by analyzing and processing any relevant data about a given entity to arrive at a decision. In this study, generic context aware service management architecture is proposed to support and enhance the context management starting from context acquisition to its final delivery of services. A way of resource handling, context acquisition, context management, service delivery and security are provided in the architecture. The context management module processes the context reasoning and context decision considering rules and historical context information. A way of context representation and model using ontological modeling approach is provided to enrich context management. To evaluate usability, applicability, reusability and extensibility of the system, the study considered scenarios in a smart campus which require a one card identification system. With the proposed architecture at hand, a one card system in a university setting is modeled using the proposed context modeling approach to extend its functionality beyond its traditional counterpart. Unlike the traditional way, which uses a barcode reader to handle individual cards, it considers context information to perform identification. Functionalities of components in the proposed architecture are also evaluated using implementation of scenarios like notification services for service areas in the domain. Technologies like RFID and Bluetooth are exploited in the implementation to support context acquisition and resource management. The study enhances mechanisms for resource discovery, context management and pervasive service deliveries. It proves the use of the proposed architecture for application in university setting and other related domains while retaining necessary functionalities. Also, security using log management method is offered as a means of security in pervasive computing. Key words: Pervasive/Ubiquitous Computing, Context, Context awareness, Ontology, Smart Campus, RFID
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    The Effectiveness of Public Assets Disposal Process; the Case of Ethiopia Public Procurement and Property Disposal Service
    (A.A.U, 2021-07) Tadesse, Yonas; G/Tsadik, Zelalem (Dr)
    The main purpose of this particular study was to assess effectiveness of the centralized public property disposal process in the case of Public Procurement and Property Disposal Service. For the total target population was only 40 employees who have direct involvement in the centralized public property disposal process and as this number is manageable an operation called census was conducted to select respondents in the study. The study used both quantitative and qualitative data sourced from the primary and secondary sources. Structured questionnaire and semi structured interview were used to obtain the primary data while the secondary data was sourced from various documents. Both descriptive and explanatory research design were also deployed to analyze the gathered data in this study with the help of Statistical Package for Social Science (SPSS version 24). From descriptive analysis finding the overall centralized property disposal process was revealed good in effectiveness but not fully effective. The finding of the confirmed that asset valuation has statistically significant positive effect on the effectiveness of the centralized public property disposal process at 1 percent significant level while legal framework and staff competency have significant positive effect on effect on the effectiveness of the process at 5 percent significant level. Poor recording and documentation practice in the beneficiary public bodies, in limitation of the asset valuation method (equation) and the gap in the legal framework were also identified as major challenge that hider the effectiveness of the centralized public property disposal. Therefore, in order to enhance the effectiveness of the process and assure value for money, the concerned regulatory bodies together with PPPDS need to revise the asset valuation equation and the legal frame work based on the identified gaps. There is also a need to improve the fixed asset recording and documentation practice of the beneficiary public bodies through continuous trainings and regular follow up.