Infectious Etiologies of Febrile Illnesses in Cameron.

Ph.D. Thesis. University of Hawaiʻi at Mānoa 2017

The impact of mobile telephony services on performance outcomes of micro-businesses in developing economies: with evidence from micro-business communities in Afghanistan and Cameroon

This thesis reports on a study conducted to investigate the relationship between the integration of mobile telephony services into micro-business processes and perceived enhanced business performance in a developing economy context, with detailed evidence drawn from a sample of 210 micro-businesses in Afghanistan and Cameroon. The research conceptualises, operationalises, and empirically tests an eclectic research model which integrates theory from the literature on the adoption and use of information and communication technologies (ICTs), on information economics, on strategic management, on entrepreneurship, and on small business growth and business performance. The research data was collected through a questionnaire, and call data extracted from the mobile phone activity-logs of micro-business owner-managers. This data was supplemented by the use of carefully-chosen photographs. The collected data was analysed using Structural Equation Modelling Techniques (SEM) with the help of AMOS 17 and SPSS statistical packages. The study also used Latent Visual Data Analysis (LVDA) to corroborate the statistical outcomes of this analysis. The results of this study identified the ‘integration of mobile telephony services into micro-business operations’, the ‘entrepreneurial competence of micro-business owner-managers’ and the ‘micro-business environment’ as having a direct influence on perceived enhanced business performance because of their potential to enable substantial cost savings, provide greater integration of the internal and external environments of the business, increase operational flexibility and reduce information asymmetries. The results also identified that ‘micro-business environments’ in Afghanistan and Cameroon tend to have a negative relationship with enhanced business performance if not moderated by the use of mobile telephony services. Finally, given the importance of micro-businesses in stimulating economic growth in developing economies and their relatively high failure rates, and because of the fact that many micro-businesses perceive that the cost of mobile telephony services are ‘high-to-very high’, this research provides greater opportunity for a discussion of the kinds of intervention strategies that could be used to improve the business integration of mobile telephony services and could therefore enhanced business performance

The impact of mobile telephony services on performance outcomes of micro-businesses in developing economies : with evidence from micro-business communities in Afghanistan and Cameroon

This thesis reports on a study conducted to investigate the relationship between the integration of mobile telephony services into micro-business processes and perceived enhanced business performance in a developing economy context, with detailed evidence drawn from a sample of 210 micro-businesses in Afghanistan and Cameroon. The research conceptualises, operationalises, and empirically tests an eclectic research model which integrates theory from the literature on the adoption and use of information and communication technologies (ICTs), on information economics, on strategic management, on entrepreneurship, and on small business growth and business performance. The research data was collected through a questionnaire, and call data extracted from the mobile phone activity-logs of micro-business owner-managers. This data was supplemented by the use of carefully-chosen photographs. The collected data was analysed using Structural Equation Modelling Techniques (SEM) with the help of AMOS 17 and SPSS statistical packages. The study also used Latent Visual Data Analysis (LVDA) to corroborate the statistical outcomes of this analysis. The results of this study identified the ‘integration of mobile telephony services into micro-business operations’, the ‘entrepreneurial competence of micro-business owner-managers’ and the ‘micro-business environment’ as having a direct influence on perceived enhanced business performance because of their potential to enable substantial cost savings, provide greater integration of the internal and external environments of the business, increase operational flexibility and reduce information asymmetries. The results also identified that ‘micro-business environments’ in Afghanistan and Cameroon tend to have a negative relationship with enhanced business performance if not moderated by the use of mobile telephony services. Finally, given the importance of micro-businesses in stimulating economic growth in developing economies and their relatively high failure rates, and because of the fact that many micro-businesses perceive that the cost of mobile telephony services are ‘high-to-very high’, this research provides greater opportunity for a discussion of the kinds of intervention strategies that could be used to improve the business integration of mobile telephony services and could therefore enhanced business performance.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Adsorption of proteins to thin-films of PDMS and its effect on the adhesion of human endothelial cells

This paper describes a simple and inexpensive procedure to produce thin-films of poly(dimethylsiloxane). Such films were characterized by a variety of techniques (ellipsometry, nuclear magnetic resonance, atomic force microscopy, and goniometry) and used to investigate the adsorption kinetics of three model proteins (fibrinogen, collagen type-I, and bovine serum albumin) under different conditions. The information collected from the protein adsorption studies was then used to investigate the adhesion of human dermal microvascular endothelial cells. The results of these studies suggest that these films can be used to model the surface properties of microdevices fabricated with commercial PDMS. Moreover, the paper provides guidelines to efficiently attach cells in BioMEMS devices.Fil: Chumbimuni Torres, Karin Y.. The University of Texas at San Antonio; Estados UnidosFil: Coronado, Ramon E.. The University of Texas at San Antonio; Estados UnidosFil: Mfuh, Adelphe M.. The University of Texas at San Antonio; Estados UnidosFil: Castro Guerrero, Carlos. The University of Texas at San Antonio; Estados UnidosFil: Silva, María Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; ArgentinaFil: Negrete, George R.. The University of Texas at San Antonio; Estados UnidosFil: Bizios, Rena. The University of Texas at San Antonio; Estados UnidosFil: Garcia, Carlos D.. The University of Texas at San Antonio; Estados Unido

The Analysis of Lateral Violence among Nurses in Accredited Hospital in Riau Province

Background: Violence in the workplace affects the performance of nurses in providing nursing care. In addition, it can increase absenteeism, influence nurses' personal and professional lives, increase administrative stress and distrust, and increase staff burnout and turnover. Purpose: This study aims to analyze lateral violence in hospital nurses. Methods: The type of research used in this research is quantitative research with a descriptive approach. This research was conducted at an accredited hospital in Pekanbaru, in January 2019. Results: The sample of the study was nurses in the room with a total of 50 respondents and the data were analyzed univariately. Conclusion: The results of the study were obtained at Petala Bumi Hospital, as many as 100% of respondents: often treated politely and respectfully by co-workers, lateral violence from co-workers in the hospital is not a problem, the seriousness of a problem regarding lateral violence by co-workers is very serious category, never lose patience and become rude to coworkers, workload is a major cause of stress related to inadequate staff and resources to deal with while at Syafira Hospital Pekanbaru as many as 80% of respondents are often treated politely and respectfully by co-workers, 48% of respondents are lateral violence from co-workers in a large hospital or caused by many people, 36% of respondents are serious about a problem about lateral violence by co-workers very serious category, 48% of respondents sometimes lose their temper and become rude to coworkers, 64% of respondents workload the main cause of stress is related to inadequate staff and resources to deal

Factors associated with prelacteal feeding practices in a rural northern Nigerian setting

Introduction: Prelacteal feeding practice contravenes the recommendation of World Health Organisation that breastfeeding be initiated within an hour of childbirth. Consequently, the health, social, emotional and economic benefits of optimal breastfeeding are limited. Therefore, to break this vicious cycle of prelacteal feeding and suboptimal breastfeeding, factors associated with the practice must be identified.Objective: To assess prelacteal feeding practices and its associated factors in a rural community with the view to generate data for community-level interventions that will promote optimal breastfeeding.Methods: Data was collected during a community-based surveillance for maternal, newborn and child health project in Tsibiri, a rural community in north-western Nigeria. The survey questionnaire was uploaded into mobile devices running on an android operating system. Trained female interviewers collected the data over a period of one week in 2011.Results: A total of 270 out of 309 interviewed women had experienced childbirth and were included in the analysis. Majority (85.2%) of respondents utilised prelacteal feeds for their newborns. Plain water was the most common prelacteal feed (44.7%). Prelacteal feeding was associated with births assisted by unskilled birth attendants (AOR 5.322, 95%CI 1.634-17.333); while operative delivery reduced the likelihood of the practice (AOR 0.168, 95%CI 0.060-0.470). No statistically significant association was found between use of prelacteal feed and women’s age, education or access to income.Conclusion: The predominance of prelacteal feeding practices underscores the need for innovative strategies that create awareness among mothers and health care providers, with emphasis on health facility deliveries, advantages of breastfeeding and risks of prelacteal feeding.Keywords: Breastfeeding, Newborns, Prelacteal feeds, Rural community, Wome

A cross-sectional study of traditional practices affecting maternal and newborn health in rural Nigeria

Introduction: certain traditional practices which have negative effects on maternal and child health continue to be practiced in sub-Saharan African countries. A survey was carried out in a rural village in Nigeria to understand the scale and range of these practices. Methods: this was a cross-sectional study in which trained interviewers administered pre-tested questionnaires on child-bearing women using questionnaires embedded on android devices. Results: the median age of marriage and pregnancy were 15 and 16 years respectively. Home births were high (90.4%) while non-skilled birth attendant was 87.4%. The community had a son preference index ratio of 1:1.4. Up to 81.5% of mothers responded that one form of unhygienic traditional procedure or the other was performed on their children. Time to initiation of breast feeding was in hours in the majority (76.3%) of mothers, with a high rate of use of prelacteal feeds (85.2%). Being an adolescent mother (AOR 0.403, 95%CI 0.203, 0,797) and utilizing a skilled provider at birth (AOR 0.245, 95%CI 0.088, 0.683) were associated with less likelihood of having an unhygienic procedure performed on children. Conclusion: the findings of our study suggest that traditional practices which could have negative effects on maternal and child health are still ongoing in the study community. Child protection laws and safeguarding principles could help to reduce these practices and would need to be developed and implemented in these settings where these practices are still prevalent

Deaminative Borylation of Aliphatic Amines Enabled by Visible Light Excitation of an Electron Donor–Acceptor Complex

A deaminative strategy for the borylation of aliphatic primary amines is described. Alkyl radicals derived from the single-electron reduction of redox-active pyridinium salts, which can be isolated or generated in situ, were borylated in a visible light-mediated reaction with bis(catecholato)diboron. No catalyst or further additives were required. The key electron donor–acceptor complex was characterized in detail by both experimental and computational investigations. The synthetic potential of this mild protocol was demonstrated through the late-stage functionalization of natural products and drug molecules

Photo-induced thiolate catalytic activation of inert Caryl-hetero bonds for radical borylation

Substantial effort is currently being devoted to obtaining photoredox catalysts with high redox power. Yet, it remains challenging to apply the currently established methods to the activation of bonds with high bond dissociation energy and to substrates with high reduction potentials. Herein, we introduce a novel photocatalytic strategy for the activation of inert substituted arenes for aryl borylation by using thiolate as a catalyst. This catalytic system exhibits strong reducing ability and engages non-activated Caryl–F, Caryl–X, Caryl–O, Caryl–N, and Caryl–S bonds in productive radical borylation reactions, thus expanding the available aryl radical precursor scope. Despite its high reducing power, the method has a broad substrate scope and good functional-group tolerance. Spectroscopic investigations and control experiments suggest the formation of a charge-transfer complex as the key step to activate the substrates