Mobile Cloud Computing: Resource Discovery, Session Connectivity and Other Open Issues

Abstract—Cloud computing can be considered as a model that provides network access to a shared pool of resources, such as storage and computing power, which can be rapidly provisioned and released with minimal management effort. This paper describes a research activity in the area of mobile cloud computing. It highlights different open issues which are associated with the mobile usage of cloud computing. By establishing a list of criteria for those issues, different solutions are compared against each other. The solutions discussed in this paper focus on different aspects of cloud computing in association with mobile usage. Each of the presented solutions offers at least one satisfactory approach for one of the open issues that are associated with the mobile usage of cloud computing resources. By combining the different existing approaches it would be possible to generate a solution that covers most of the issues currently identified

Kationendiffusion in Silikatschmelzen

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mRNA-Expression of ERα, ERβ, and PR in Clonal Stem Cell Cultures Obtained from Human Endometrial Biopsies

Background. Proliferation and differentiation of the endometrium are regulated by estrogen and progesterone. The enormous regenerative capacity of the endometrium is thought to be based on the activity of adult stem cells. However, information on endocrine regulatory mechanisms in human endometrial stem cells is scarce. In the present study, we investigated the expression of ERα, ERβ, and PR in clonal cultures of human endometrial stem cells derived from transcervical biopsies. Methods. Endometrial tissue of 11 patients was obtained by transcervical biopsy. Stromal cell suspensions were plated at clonal density and incubated for 15 days. Expression of ERα, ERβ and PR was determined by qPCR prior to and after one cloning round, and normalized to 18 S rRNA expression. Results. Expression of ERα and ERβ was downregulated by 64% and 89%, respectively (P = 0.002 and P < 0.001). In contrast, PR was not significantly downregulated, due to a more heterogenous expression pattern. Conclusions. Culture of human endometrial stroma cells results in a downregulation of ERα and ERβ, while expression of PR remained unchanged in our patient collective. These results support the hypothesis that stem cells may not be subject to direct stimulation by sex steroids, but rather by paracrine mechanisms within the stem cell niche

Social Protection in Ghana and Kenya through an Inclusive Development Lens: complex effects and risks

This paper analyzes the complex effects and risks of social protection programmes in Ghana and Kenya on poor people’s human wellbeing, voice and empowerment and interactions with the social protection regulatory framework and policy instruments. For this purpose, it adopts a comprehensive Inclusive Development framework to systematically explore the complex effects of cash transfers and health insurance at the individual, household and community level. The findings highlight the positive provisionary and preventive effects of social protection, but also illustrate that the poorest are still excluded and that promotive effects, in the form of enhanced productivity, manifest themselves mainly for the people who are less resource poor. They can build more effectively upon an existing asset base, capabilities, power and social relations to counter the exclusionary mechanisms of the system, address inequity concerns and offset the transaction costs of accessing and benefitting from social protection. The inclusive development framework enables to lay these complex effects and interactions bear, and points to areas that require more longitudinal and mixed methodology research

Social Protection in Zambia – Whose Politics?

Attempts have been made to explain why social protection systems seem least likely to become established where they are most needed. Often, however, these attempts have not captured the rather complex politics in the countries in question. Analyses have turned the Minister of Finance into the sole representative of political will, have equated low budgetary allocations with a politically unattractive programme design and have ignored the long and erratic histories of social protection in the Western world. The appropriate roles for donors and civil societies in such political economies remain equally unclear. On the basis of other ‘drivers of change’ studies, this article takes a closer look at the political dynamics behind social protection in Zambia. It examines whether the observed or deduced stagnation in social protection is due to stakeholders in Zambia rejecting policy recommendations, the inappropriate nature of these recommendations or a premature assessment of progress made