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Search Results: 1 - 10 of 2177 matches for " Mike Perks "
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Impact of Tree Stump Harvesting on Soil Carbon and Nutrients and Second Rotation Tree Growth in Mid-Wales, UK  [PDF]
Elena I. Vanguelova, Rona Pitman, Sue Benham, Mike Perks, James I. L. Morison
Open Journal of Forestry (OJF) , 2017, DOI: 10.4236/ojf.2017.71005
Abstract: The drive to develop renewable energy is increasing the interest in energy forestry. Woody biomass from forest residues has the potential to make a significant contribution to greenhouse gas emission reduction through fossil fuel substitution. However, there is a danger of operational practice running ahead of the understanding of the environmental impacts of such activities. Consequently, there is an urgent requirement for scientifically underpinned guidance on the best management practices to ensure soil and water protection, including sustaining forestry’s key role in carbon capture. This study addresses the main issues associated with stump harvesting practices and their impacts on soil carbon and nutrient capital and effects on the second rotation tree growth. It reports results from a clearfell site in the UK where experimental stump harvesting was carried out in 2005 before replanting with Sitka spruce Picea sitchensis (Bon.)Carr. Both stump harvested and conventional harvested areas (Control) were studied in 2009 and 2010, five years after harvesting, on the two distinct soil types at the site: podzolised brown earth and peaty gley soils. Results show impacts of stump harvesting on soil carbon and nitrogen stocks, residual water, base cations (K+, Ca2+ and Mg2+) concentrations and stocks and bulk density in both soil types. The organic peaty gley soil showed larger and deeper profile changes after stump harvesting compared with the podzolised brown mineral soil, where some of the negative changes in C, N and base cations in the top soil were compensated by increases at depth. Tree assessment showed positive effect of stump harvesting on K and Ca uptake by young seedlings, but N and P nutrient status was reduced on the peaty gley soils. The overall results support the current UK forestry guidance for stump harvesting which identifies that soil type is the most important site factor determining the sustainability of the practice.
A perceptual study of the impact of green practice implementation on the business functions
EE Smith, S Perks
Southern African Business Review , 2010,
Abstract: 1This article outlines the perceptions of businesses regarding the impact of green practice implementation on the business functions. To achieve the aim of this study, an in-depth literature study and empirical research were undertaken. A self-administered questionnaire was completed by 298 owners, managers and employees in businesses within the Nelson Mandela Metropole. To investigate the relationship between the independent (classifi cation data) and dependent variables (perceptions of impact on business functions), 13 null hypotheses were tested. The results revealed signifi cant relationships between these variables. It was found that the functions least impacted by green business practices are general management/human resources, purchasing/supply chain management and fi nance/information technology. Further analysis of the business functions reveals that the manufacturing/ operations, marketing/sales and distribution/logistics functions are the most impacted by green business practices. Practical guidelines are provided to assist in greening the business functions.
The Housing Careers of Older Canadians: An Investigation Using Cycle 16 of the General Social Survey
Haan, Michael,Perks, Thomas
Canadian Studies in Population , 2008,
Abstract: English In this paper we use the Aging and Social Support Survey (GSS16) and the theoretical conception of a ‘housing career’ to identify the correlates of housing tenure (rent vs.own) among Canadians age 45 and over. We draw on primarily US literature to isolate three general explanatory clusters (social support, health, and economic characteristics).Based on analyses using logistic regression, the results indicate that the majority of variation in housing tenure exists due to standard demographic and household characteristics. In fact, of the three focal explanatory clusters, only social support characteristics significantly enhance model fit beyond the baseline model, suggesting that the housing tenure of older Canadians hinges heavily on fairly standard characteristics. French Dans cet article, nous nous sommes servis de l’enquête Vieillissement et soutien social (ESG16) et de la théorie du cycle de vie du logement pour identifier les corrélatsdes modes d’occupation (location vs. propriétariat) chez les canadiens agés de 45 ans etplus. Nous avons principalement puisé la littérature des états-Unis pour isoler trois groupesexplicatifs généraux (caractéristiques: de support social, de santé, et économiques).Les résultats, basés sur des analyses de régression logistique, indiquent que la majoritédes variations dans les modes d’occupation peuvent être attribuées à des caractéristiquesdémographiques et économiques de base. En effet, des trois groupes explicatifs focaux, cesont seulement les caractéristiques de support social qui ont fait monter l’ajustement dumodèle en delà du modèle de base, ce qui suggère que les modes d’occupation des logementspour les canadiens d’un certain age dépend beaucoup des caractéristiques de base.Mots clés: Cycle de vie du logement, modes d’occupation de logements, adultes agés
Training Interventions Needed For Developing Black Micro-Entrepreneurial Skills In The Informal Sector: A Qualitative Perspective
E. E. Smith,S. Perks
South African Journal of Human Resource Management , 2006, DOI: 10.4102/sajhrm.v4i1.85
Abstract: This article outlines the results of a qualitative study, which investigates the nature of training interventions needed for developing black micro entrepreneurial skills in the informal sector. As this is a qualitative study, an empirical survey was conducted by means of a series of in-depth interviews with ten black micro entrepreneurs. A control group was used to verify the results of the initial sample selected. Four main types of entrepreneurial skills were identified, namely personal, technical, business operations and management skills. A model is developed indicating which training interventions and methods could be used to upgrade black micro entrepreneurial skills. General guidelines are also provided as to how training could be used to facilitate the acquisition of these microentrepreneurial skills.
Employee perceptions regarding whistle-blowing in the workplace: A South African perspective
Sandra Perks,Elroy E. Smith
South African Journal of Human Resource Management , 2008, DOI: 10.4102/sajhrm.v6i2.159
Abstract: The purpose of whistle-blowing is to eradicate unethical behaviour in the work place. This article investigates the perceptions of South African employees (n=387) employed in medium and large organisations regarding whistle-blowing. Respondents regard personal viewpoints and the supportive organisational environment as determining factors for whistle-blowing. South African employees have faced minimal negative consequences and will again engage in whistle-blowing, regardless of union support. Organisations can create a whistle-blowing culture by having a personal code of ethics, using hotlines, having an ethical committee, engaging in periodic ethics training and doing an annual ethical audit.
Efficacy of Facebook Fans: Can They Influence Perception of the Brand?  [PDF]
Mike Behan
Open Journal of Business and Management (OJBM) , 2014, DOI: 10.4236/ojbm.2014.24033
Abstract: Using a qualitative single case study methodology, this research studied the effect that a Facebook page has on friends of the brand. The problem under investigation is the lack of understanding effects social media sites like Facebook has on the perception of the brand by the user. The data collected suggests that the use of Facebook by a SME does help maintain and in some cases increase the perception of the brand in the positive. The analysis of the data additionally shows this effect on brand perception is based on the drivers of a) connectivity, b) change of perception, c) internal value, d) goodwill, and e) the decision process. Interview participants indicate the importance Facebook has as a marketing communication tool. The findings from the research suggest that Facebook use by SMEs is an important component of an integrated approach to marketing communications when considering the perception of the brand. This research also raises important questions as to what significance Facebook use by SMEs has over other traditional marketing communication methods when creating, communicating, and delivering a message of value.
District health programmes and health-sector reform: case study in the Lao People's Democratic Republic
Perks,Carol; Toole,Michael J; Phouthonsy,Khamla;
Bulletin of the World Health Organization , 2006, DOI: 10.1590/S0042-96862006000200014
Abstract: the lao people's democratic republic (lao pdr) is classified by the world bank as a low-income country under stress. development partners have sought to utilize effective aid instruments to help countries classified in this way achieve the millennium development goals; these aid instruments include sector-wide approaches (swaps) that support decentralized district health systems and seek to avoid fragmentation and duplication. in asia and the pacific, only bangladesh, papua new guinea and the solomon islands have adopted swaps. since 1991, a comprehensive primary health care programme in the remote sayaboury province of lao pdr has focused on strengthening district health management, improving access to health facilities and responding to the most common causes of mortality and morbidity among women and children. between 1996 and 2003, health-facility utilization tripled, and the proportion of households that have access to a facility increased to 92% compared with only 61% nationally. by 2003, infant and child mortality rates were less than one-third of the national rates. the maternal mortality ratio decreased by 50% despite comprehensive emergency obstetric care not being available in most district hospitals. these trends were achieved with an investment of approximately us$ 4 million over 12 years (equivalent to us$ 1.00 per person per year). however, this project did not overcome weaknesses in some national disease-control programmes, especially the expanded programme on immunization, that require strong central management. in lao pdr, which is not yet committed to using swaps, tools developed in sayaboury could help other district health offices assume greater planning responsibilities in the recently decentralized system. development partners should balance their support for centrally managed disease-specific programmes with assistance to horizontally integrated primary health care at the district level.
Possibilities for carbon sequestration in Irish forests. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000
Byrne K.A.,Perks M.
Biotechnologie, Agronomie, Société et Environnement , 2000,
Abstract: Ireland has a rapidly expanding forest estate which covers some 9/ of the land area. It is government policy to increase this to 17/ by the year 2030. Preliminary studies suggest that forestry activities have the potential to contribute significantly to the mitigation of greenhouse gas emissions. Although some studies have been carried out the determination of the carbon stores and sinks in Irish forests will require a considerable research effort in the future. A key aspect of such studies will be field based studies which measure all components of the carbon cycle and their relationship to climatic and environmental conditions as well as management practices. Many of these issues will be addressed in the recently announced research programme of the Council for Forest Research and Development (COFORD).
District health programmes and health-sector reform: case study in the Lao People's Democratic Republic
Perks Carol,Toole Michael J,Phouthonsy Khamla
Bulletin of the World Health Organization , 2006,
Abstract: The Lao People's Democratic Republic (Lao PDR) is classified by the World Bank as a low-income country under stress. Development partners have sought to utilize effective aid instruments to help countries classified in this way achieve the Millennium Development Goals; these aid instruments include sector-wide approaches (SWAps) that support decentralized district health systems and seek to avoid fragmentation and duplication. In Asia and the Pacific, only Bangladesh, Papua New Guinea and the Solomon Islands have adopted SWAps. Since 1991, a comprehensive primary health care programme in the remote Sayaboury Province of Lao PDR has focused on strengthening district health management, improving access to health facilities and responding to the most common causes of mortality and morbidity among women and children. Between 1996 and 2003, health-facility utilization tripled, and the proportion of households that have access to a facility increased to 92% compared with only 61% nationally. By 2003, infant and child mortality rates were less than one-third of the national rates. The maternal mortality ratio decreased by 50% despite comprehensive emergency obstetric care not being available in most district hospitals. These trends were achieved with an investment of approximately US$ 4 million over 12 years (equivalent to US$ 1.00 per person per year). However, this project did not overcome weaknesses in some national disease-control programmes, especially the expanded programme on immunization, that require strong central management. In Lao PDR, which is not yet committed to using SWAps, tools developed in Sayaboury could help other district health offices assume greater planning responsibilities in the recently decentralized system. Development partners should balance their support for centrally managed disease-specific programmes with assistance to horizontally integrated primary health care at the district level.
Intrinsic, Pro-Apoptotic Effects of IGFBP-3 on Breast Cancer Cells are Reversible: Involvement of PKA, Rho, and Ceramide
Claire M. Perks,Jeff M. P. Holly
Frontiers in Endocrinology , 2011, DOI: 10.3389/fendo.2011.00013
Abstract: We established previously that IGFBP-3 could exert positive or negative effects on cell function depending upon the extracellular matrix composition and by interacting with integrin signaling. To elicit its pro-apoptotic effects IGFBP-3 bound to caveolin-1 and the beta 1 integrin receptor and increased their association culminating in MAPK activation. Disruption of these complexes or blocking the beta 1 integrin receptor reversed these intrinsic actions of IGFBP-3. In this study we have examined the signaling pathway between integrin receptor binding and MAPK activation that mediates the intrinsic, pro-apoptotic actions of IGFBP-3. We found on inhibiting protein kinase A (PKA), Rho associated kinase (ROCK), and ceramide, the accentuating effects of IGFBP-3 on apoptotic triggers were reversed, such that IGFBP-3 then conferred cell survival. We established that IGFBP-3 activated Rho, the upstream regulator of ROCK and that beta1 integrin and PKA were upstream of Rho activation, whereas the involvement of ceramide was downstream. The beta 1 integrin, PKA, Rho, and ceramide were all upstream of MAPK activation. These data highlight key components involved in the pro-apoptotic effects of IGFBP-3 and that inhibiting them leads to a reversal in the action of IGFBP-3.
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