Browsing by Author "Ogao, Patrick J."

Now showing 1 - 9 of 9
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    Acceptance and Use of Electronic Library Services in Ugandan Universities
    (ACM/IEEE-CS joint conference, 2008) Tibenderana, Prisca K. G.; Ogao, Patrick J.
    University libraries in Developing Countries (DCs), hampered by developmental problems, find it hard to provide electronic services. Donor communities have come in to bridge this technology gap by providing funds to university libraries for information technology infrastructure, enabling these university libraries to provide electronic library services to patrons. However, for these services to be utilized effectively, library endusers must accept and use them. To investigate this process in Uganda, this study modifies “The Unified Theory of Acceptance and Use of Technology” (UTAUT) by replacing “effort expectancy” and “voluntariness” with “relevancy”, “awareness” and “benefits” factors. In so doing, we developed the Service Oriented UTAUT (SOUTAUT) model whose dependent constructs predict 133% of the variances in user acceptance and use of e-library services. The study revealed that relevancy moderated by awareness plays a major factor in acceptance and use of e-library services in DCs.
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    Autonomous Virtual Machine Sizing and Resource Usage Prediction for Efficient Resource Utilization in Multi-Tenant Public Cloud
    (I.J. Information Technology and Computer Science, 2019) Kenga, Derdus M.; Omwenga, Vincent O.; Ogao, Patrick J.
    In recent years, the use of cloud computing has increased exponentially to satisfy computing needs in both big and small organizations. However, the high amounts of power consumed by cloud data centres have raised concern. A major cause of power wastage in cloud computing is inefficient utilization of computing resources. In Infrastructure as a Service, the inefficiency is caused when users request for more resources for virtual machines than is required. In this paper, we propose a technique for automatic virtual machine sizing and resource usage prediction using neural networks, for multi tenant Infrastructure as a Service cloud service model. The proposed technique aims at reducing energy wastage in data centres by efficient resource utilization. An evaluation of our technique on CloudSim Plus cloud simulator and WEKA shows that effective VM sizing not only achieves energy savings but also reduces the cost of using cloud services from a customer perspective.
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    Geometrical Spatial Data Integration in Geo-Information Management
    (Fountain Publishers, 2007) Wadembere, Ismail; Ogao, Patrick J.
    One of the reasons that Individual users and organizations use GIS, is to exchange geospatial data as a means to location based decision-making. A considerable amount of preprocessing has to be done, before and after the data has been integrated. Within this decade, we are seeing developments in technologies which are creating services which need geospatial data comparison and integration (Najar et al., 2006). This is so evident in: Google Earth; Microsoft’s MapPoint.Net; O’Reilly’s Where 2.0; Intergraph’s reorganization around “SIM”; Oracle Locator and Spatial; ESRI’s ArcGIS 9.x; US Census’ MAF/TIGER integration; new platforms, new vendors, new users and the many conferences on mobile commerce and locationbased services (Batty, 2004, Alperin, 2005) and varying application (Busgeeth and Rivett, 2004). These developments and changes are so diverse that they don’t even seem related, but they are (Sonnen, 2005); that is, they take advantage of the vast geo-information available, which reflect the increased importance of location in information systems and services (Strader et al., 2004).
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    Information Communication Technologies Acceptance and Use Among University Communities in Uganda: A Model for Hybrid Library Services End-Users
    (Fountain Publishers, 2008) Tibenderana, Prisca K. G.; Ogao, Patrick J.
    Since their inception during the first century, library institutions have used manual operations to provide services to patrons. Information seekers in these libraries spent a lot of time perusing through card catalogues and searching rows of stacks for material that may have been checked out by someone else. The tradition tool and techniques were inadequate and time consuming. The introduction of the new technologies has changed this concept and what we have now are hybrid libraries based on computer networks and physical facilities. This investigation is an effort to examine alternative measures of intention in revalidating and expanding (Venkatesh et al. 2003) UTAUT model in the context of hybrid library services using university communities in a less developed country, Uganda.
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    Measuring Levels of End-Users’ Acceptance and Use of Hybrid Library Services
    (International Journal of Education and Development using ICT, 2010) Tibenderana, Prisca; Ogao, Patrick J.; Odongo, J. Ikoja; Wokadala, James
    This study concerns the adoption of Information Communication Technology (ICT) services in libraries. The study collected 445 usable data from university library end-users using a crosssectional survey instrument. It develops, applies and tests a research model of acceptance and use of such services based on an existing UTAUT model by Venkatesh, et al. (2003). Results show that ‘relevance’ and ‘social influence’ have significant effects on intentions to use e-library services. Results further show that university communities in Uganda are inclined to use electronic library services due to social demands, relevancy of services, available facilitating conditions and benefits they expect from the services. Most importantly, the Service Oriented Unified Theory of Acceptance and Use of Technology (SOUTAUT) model explains 57% of variance towards acceptance and use of e-library services.
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    MOVE: A Multi-level Ontology-based Visualization and Exploration framework for genomic networks
    (Silico Biology, 2006) Bosman, Diederik W. J.; Blom, Evert-Jan; Ogao, Patrick J.; Kuipers, Oscar P.; Roerdink, Jos B. T. M.
    Among the various research areas that comprise bioinformatics, systems biology is gaining increasing attention. An important goal of systems biology is the unraveling of dynamic interactions between components of living cells (e. g., proteins, genes). These interactions exist among others on genomic, transcriptomic, proteomic and metabolomic levels. The levels themselves are heavily interconnected, resulting in complex networks of different interacting biological entities. Currently, various bioinformatics tools exist which are able to perform a particular analysis on a particular type of network. Unfortunately, each tool has its own disadvantages hampering it to be used consistently for different types of networks or analytical methods. This paper describes the conceptual development of an open source extensible software framework that supports visualization and exploration of highly complex genomic networks, like metabolic or gene regulatory networks. The focus is on the conceptual foundations, starting from requirements, a description of the state of the art of network visualization systems, and an analysis of their shortcomings. We describe the implementation of some initial modules of the framework and apply them to a biological test case in bacterial regulation, which shows the relevance and feasibility of the proposed approach.
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    A Review of Information Security Preparedness Evaluation Mechanisms in Law Enforcement Agencies
    (IOSR Journal of Computer Engineering (IOSR-JCE), 2016) Ndichu, Samuel W.; Ogao, Patrick J.
    Law enforcement agencies being the primary security organs in a country are highly prone to information and network attacks due to the sensitivity nature of the information they deal with in their day to day operations. Information security preparedness requires a consideration of both technical and nontechnical solutions to information security. This paper presents a review of information security preparedness evaluation frameworks, approaches, methods and models available today which the law enforcement agencies and other organizations can use to quickly and reliably evaluate the current security state of their information and or network. The paper also highlights the weakness in each of these mechanisms and points towards a more comprehensive framework for information security preparedness evaluation in law enforcement agencies.
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    A tool for exploring space-time patterns : an animation user research
    (International Journal of Health Geographics, 2006) Ogao, Patrick J.
    Ever since Dr. John Snow (1813–1854) used a case map to identify water well as the source of a cholera outbreak in London in the 1800s, the use of spatio-temporal maps have become vital tools in a wide range of disease mapping and control initiatives. The increasing use of spatio-temporal maps in these life-threatening sectors warrants that they are accurate, and easy to interpret to enable prompt decision making by health experts. Similar spatio-temporal maps are observed in urban growth and census mapping – all critical aspects a of a country's socio-economic development. In this paper, a user test research was carried out to determine the effectiveness of spatio-temporal maps (animation) in exploring geospatial structures encompassing disease, urban and census mapping. Results: Three types of animation were used, namely; passive, interactive and inference-based animation, with the key differences between them being on the level of interactivity and complementary domain knowledge that each offers to the user. Passive animation maintains the view only status. The user has no control over its contents and dynamic variables. Interactive animation provides users with the basic media player controls, navigation and orientation tools. Inference-based animation incorporates these interactive capabilities together with a complementary automated intelligent view that alerts users to interesting patterns, trends or anomalies that may be inherent in the data sets. The test focussed on the role of animation passive and interactive capabilities in exploring space-time patterns by engaging test-subjects in thinking aloud evaluation protocol. The test subjects were selected from a geoinformatics (map reading, interpretation and analysis abilities) background. Every test-subject used each of the three types of animation and their performances for each session assessed. The results show that interactivity in animation is a preferred exploratory tool in identifying, interpreting and providing explanations about observed geospatial phenomena. Also, exploring geospatial data structures using animation is best achieved using provocative interactive tools such as was seen with the inference-based animation. The visual methods employed using the three types of animation are all related and together these patterns confirm the exploratory cognitive structure and processes for visualization tools. Conclusion: The generic types of animation as defined in this paper play a crucial role in facilitating the visualization of geospatial data. These animations can be created and their contents defined based on the user's presentational and exploratory needs. For highly explorative tasks, maintaining a link between the data sets and the animation is crucial to enabling a rich and effective knowledge discovery environment.
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    Towards a Geometrical Spatial Integration Model for GIS
    (International Journal of Computing and ICT Research, 2008) Wadembere, Ismail; Ogao, Patrick J.
    Geospatial information systems provide avenues to fulfill users’ quest for both absolute and relative locations of features/objects. To achieve this, the users need to have access to different geospatial data sets from various sources. This calls for integration of data from different geospatial sources. But, there are shortcomings as different data sets may not map exactly onto one another, one of reasons being the difference in features’ geometry. This paper presents a conceptual model for geospatial data integration that can identify and measure differences and adjust spatial geometries of geospatial features to form meaningful objects which can be used for geo-spatial analysis, modeling, and easy geo-information management.