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Information & Knowledge Management: Recent submissions

Now showing items 61-77 of 77

Automated exploration and exploitation of flow-injection response surfaces

Wadell, A.P; Shiundu, P.M; Wentze, P.D (Elsevier, 1990)

Three-dimensional plots of instrumental responses vs. chemical concentrations or flow parameters have been 1 obtained in an automated manner on a computer-controlled flow-injection methods development system. Consideration ...
Magnitude and direction of thermal diffusion of colloidal particles measured by thermal field-flow fractionation

Shiundu, Paul M; Williams, P.Stephen; Giddings, J.Calvin (Elsevier, 2003)

In this paper we provide experimental evidence showing that various types of submicrometer-sized particles (latexes, inorganic, and metallic), suspended in either aqueous or nonaqueous carrier liquids to which a temperature ...
Retention behavior of metal particle dispersions in aqueous and nonaqueous carriers in thermal field-flow fractionation

Shiundu, Paul M; Munguti, Stephen M; Ratanathanawongs, S.Kim Williams (Elsevier, 2003)

Until quite recently, theories on thermophoresis of particles predicted very low thermophoretic velocities of metal particles in liquids. This prediction was based on the understanding that the very high thermal conductivities ...
Isolation and characterization of polymeric and particulate components of acrylonitrile–butadiene–styrene (ABS) plastics by thermal field-flow fractionation

Shiundu, Paul M; Remsen, Edward E; Giddings, J. Calvin (Wiley, 1996)

Thermal field-flow fractionation (ThFFF) is shown here to be capable of isolating the polymeric and rubber particulate components of acrylonitrile–butadiene–styrene (ABS) plastic in a simple analytical procedure. To ...
Adsorption and detection of some phenolic compounds by rice husk ash of Kenyan origin

Mbui, Damaris N; Shiundu, Paul M; Ndonye, Rachel M; Kamau, Geoffrey N (2002)

Rice husk ash (RHA) obtained from a rice mill in Kenya has been used as an inexpensive and effective adsorbent (and reagent) for the removal (and detection) of some phenolic compounds in water. The abundantly available ...
Separation of Particles in Nonaqueous Suspensions by Thermal Field-Flow Fractionation

Shiundu, Paul M; Liu, Guangyue; Giddings, J. Calvin (1995)
Influence of bulk and surface composition on the retention of colloidal particles in thermal field-flow fractionation

Shiundu, Paul M; Giddings, J. Calvin (Elsevier, 1995)

In this paper we report a wide range of cases in which the retention of colloidal particles in thermal field-flow fractionation (FFF) shows a strong dependence on the chemical composition of the particles or of the particle ...
Size and compositional studies of core-shell latexes using flow and thermal field-flow fractionation

Ratanathanawongs, S Kim; Shiundu, Paul M; Giddings, J Calvin (Elsevier, 1995)

Two field-flow fractionation (FFF) techniques, flow FFF and thermal FFF, have been used as complementary techniques in a study of core-shell latex particles. Different types of physicochemical information about the particles ...
Practical implications of ionic strength effects on particle retention in thermal field-flow fractionation

Shiundu, Paul; Muguti, SM; Williams, KRS (2015-05-20)

Modification of ionic strength of an aqueous or non-aqueous carrier solution can have profound effects on the particle retention behavior in thermal field-flow fractionation (ThFFF). These effects can be considered as ...
Women librarians in Kenya: a study of their status and occupational characteristics

Kiplang'at, Joseph; Majanja, Mabel (Emerald Group Publishing Limited, 2003)

This study investigated the current status and occupational characteristics of women librarians in Kenya. The study’s objectives were to: compare their status to that of their male counterparts; establish their career ...
Obstacles to utilization of information held by archival institutions

Kemoni, Henry N.; Kiplang'at, Joseph; Wamukoya, Justus (Emerald Group Publishing Limited, 2003)

The paper reviews literature on the obstacles that hinder the use of information held in archival institutions. First, it highlights the importance of records and archives as sources of information. Second, the paper ...
Diffusion of Information and Communication Technologies in communication of agricultural information among agricultural researchers and extension workers in Kenya

Kiplang’at, Joseph (South African Journal of Library and Information Science, 2005)

The paper reports on the findings of a study that investigated the diffusion of Information and Communication Technologies (ICTs) in communication of agricultural information among agricultural researchers and extension ...
An analysis of the opportunities for information technology in improving access, transfer and the use of agricultural information in the rural areas of Kenya

Kiplang’at, Joseph (MCB UP Ltd, 1999)

Presented at the SCANUL‐ECS Conference held in Kenya 23‐26 July 1998. Examines the opportunities of information technology (IT) in improving access, transfer and use of agricultural information in the rural areas of Kenya. ...
The diffusion of innovations theory as a theoretical framework in library and information science research

Kiplang’at, Joseph; Minishi, Majanja, Mabel K. (South African Journal of Library and Information Science, until Vol 67, Issue 2, 2005)

This paper discusses the appropriateness of Diffusion of Innovations (DoI) Theory as a platform for explaining aspects of information and communication technology (ICT) innovation adoption process in the field of Library ...
Information ethics as a global Issue/north/south

Kibugi, Sarah (2009)

In order to appreciate the implications of information ethics as aglobal issue and specifically reflecting the North/and South, we needfirst to look at the Universal Declaration of Human Rights Article 19Everyone has the ...
The use of social media in the dissemination of information in selected public and private university libraries in Kenya

Kibugi, Sarah (2013-12)

Effective use of social media in university libraries is important if these libraries have to play their central role in the university and to fulfill their primary responsibility of assisting users in the process of ...
Application of resource dependency theory and transaction cost theory in analysing outsourcing information communication services decisions: A case of selected public university libraries in Kenya

Kiplang’at, Joseph; Gichoya, David; Mwai, Naomi Wangari (Emerald Group Publishing Limited, 1983)

Purpose – The aim of this paper is to establish how resource dependency theory (RDT) and transaction cost theory (TCT) can inform decisions to outsource ICT services by public university libraries in Kenya. Design/ ...

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