Books, Book Reviews and Book ChaptersBooks and Book Chaptershttp://repository.dkut.ac.ke:8080/xmlui/handle/123456789/712024-03-29T15:50:53Z2024-03-29T15:50:53ZDigital Transformation of Academic Libraries in Developing Countries in AfricaOtike, Fredrickhttp://repository.dkut.ac.ke:8080/xmlui/handle/123456789/80172024-02-03T09:00:44Z2023-08-01T00:00:00ZDigital Transformation of Academic Libraries in Developing Countries in Africa
Otike, Fredrick
The concept of digital transformation in academic libraries and academic institutions is pretty new, especially, in developing countries. Digital transformation process is more common in businesses and entrepreneurship, where the focus is on increase of revenue and profits as opposed to academic libraries, where the focus is on user satisfaction and efficiency in service delivery. Digital transformation in academic library focuses mainly on user satisfaction as such, this paper offers valuable information to academic libraries and academic institutions in the implementation of digital transformation processes. The paper critically analyses and explores the digital transformation process in academic libraries and its implementation in developing countries in Africa, it establishes appropriate digital transformation process that academic libraries can adopt so as to ensure a smooth digital transformation process. Using the Disruptive Technology theory, the paper clearly explains and highlights the relationship between implementation of digitalization and the digital transformation processes. From the paper, the importance of digital transformation processes in academic libraries and academic institutions from developing countries is established. The paper concludes by sharing factors and challenges that will enable the implementation of digital transformation process in academic libraries.
2023-08-01T00:00:00ZEffect of Doping Temperatures and Nitrogen Precursors on the Physicochemical, Optical, and Electrical Conductivity Properties of Nitrogen-Doped Reduced Graphene OxideNgidi, Nonjabulo P. D.Ollengo, Moses A.Nyamori, Vincent O.http://repository.dkut.ac.ke:8080/xmlui/handle/123456789/78712022-12-07T05:49:12Z2022-01-01T00:00:00ZEffect of Doping Temperatures and Nitrogen Precursors on the Physicochemical, Optical, and Electrical Conductivity Properties of Nitrogen-Doped Reduced Graphene Oxide
Ngidi, Nonjabulo P. D.; Ollengo, Moses A.; Nyamori, Vincent O.
The greatest challenge in graphene-based material synthesis is achieving large surface
area of high conductivity. Thus, tuning physico-electrochemical properties of these materials is of
paramount importance. An even greater problem is to obtain a desired dopant configuration which
allows control over device sensitivity and enhanced reproducibility. In this work, substitutional
doping of graphene oxide (GO) with nitrogen atoms to induce lattice–structural modification of GO
resulted in nitrogen-doped reduced graphene oxide (N-rGO). The effect of doping temperatures and
various nitrogen precursors on the physicochemical, optical, and conductivity properties of N-rGO is
hereby reported. This was achieved by thermal treating GO with different nitrogen precursors at
various doping temperatures. The lowest doping temperature (600
◦
C) resulted in less thermally
stable N-rGO, yet with higher porosity, while the highest doping temperature (800
C) produced the
opposite results. The choice of nitrogen precursors had a significant impact on the atomic percentage
of nitrogen in N-rGO. Nitrogen-rich precursor, 4-nitro-o-phenylenediamine, provided N-rGO with
favorable physicochemical properties (larger surface area of 154.02 m
2
g
−1
) with an enhanced
electrical conductivity (0.133 S cm
−1
) property, making it more useful in energy storage devices. Thus,
by adjusting the doping temperatures and nitrogen precursors, one can tailor various properties
of N-rGO.
◦
2022-01-01T00:00:00ZLiving, Learning AND Teaching IN A Refugee Camp Biographies of PerseveranceKhamasi, Jennifer W.Cynthia, C. NicolSamson, N. Maderahttp://repository.dkut.ac.ke:8080/xmlui/handle/123456789/78202022-11-29T15:02:33Z2009-01-01T00:00:00ZLiving, Learning AND Teaching IN A Refugee Camp Biographies of Perseverance
Khamasi, Jennifer W.; Cynthia, C. Nicol; Samson, N. Madera
The United Nations High Commissioner for Refugees (UNHCR) reports more
than 65 million people are displaced worldwide including more than 17 million as
refugees forced to leave their own countries due to conflict, war, famine or persecution
(UNHCR, 2016). The current global situation is escalating to new levels characterized by a huge migration from the Middle East to Europe, among other regions. At
the end of November 2017 the UNHCR reported close to 250,000 registered refugees
are in the Dadaab camps complex (UNHCR, 2017). Although this number was
substantially higher some years ago with continued political unrest compounded by
severe famine, the population of Dadaab camp is spread over four camps: Dagahaley,
Hagadera, Ifo 1, and Ifo 2 (UNHCR, 2017). Close to 96 percent of the refugees are
Somalis from Somalia while Ethiopians comprise the second largest group, with small
numbers of Sudanese, Eritreans, Congolese, Burundians, Tanzanians, Ugandans, and
Rwandans also present. The camps have existed since 1991 and a significant population has spent their entire lives there. The camps have well- established schools,
hospitals, portable water and reasonable community service amenities. The cultural
and historical location of Dadaab Camp and its circumstances are complex. Initially,
the location was chosen because the refugee camp was expected to be temporary
2009-01-01T00:00:00ZEffect of Machining Parameters on Surface Roughness and Material Removal Rate in Dry Turning of AISI 1080 Mild Steel Using HSS ToolsJob M. WambuaCelestine K. KinyuaRoyston K. MwikathiAyub O. OwinoMartin M. KirimiMwema, Fredrick Madarakahttp://repository.dkut.ac.ke:8080/xmlui/handle/123456789/76312022-11-09T07:09:56Z2022-10-31T00:00:00ZEffect of Machining Parameters on Surface Roughness and Material Removal Rate in Dry Turning of AISI 1080 Mild Steel Using HSS Tools
Job M. Wambua; Celestine K. Kinyua; Royston K. Mwikathi; Ayub O. Owino; Martin M. Kirimi; Mwema, Fredrick Madaraka
This study involves the dry turning of mild steel AISI 1080 in the universal lathe machine using high-speed steel (HSS) right-hand cutting tools. The experiments were designed using the Taguchi method and three process parameters, viz., cutting speed, depth of cut, and clearance angle, each with four levels. To obtain the tool angles, the HSS tool blanks were ground to obtain several clearance angles. The design yielded an L9 orthogonal array, which led to nine experimental trials. After the experiments, the samples were investigated for average surface roughness and the material removal rate. The average surface roughness was measured using the T200 handheld surface roughness tester, while the material removal rate was computed from the mass of chips and turning time. The responses were evaluated using the Taguchi analysis and the analysis of variance (ANOVA). From the Taguchi analysis, the signal-to-noise ratios were obtained. From the ratios, the minimum average surface roughness was obtained as 0.906 µm, as well as the maximum material removal rate of 0.1888 kg/min. These values represented the optimal responses. For the minimum average surface roughness, the optimal parameters were clearance angle of 22.65°, 755 rpm cutting speed and 0.7 mm depth of cut. Consequently, for the maximum material removal rate, the optimal parameters were a clearance angle of 22.65°, a cutting speed of 755 rpm and a depth of cut of 0.5 mm. From the ANOVA, the clearance angle was identified as the most significant factor contributing to surface roughness. Moreover, the depth of cut was identified as the largest contributor to the material removal rate.
2022-10-31T00:00:00Z