Is early diagnose for Vitamin A deficiency better than the current supplementation programme of Nepal?

This editorial concludes that prevention is still better than cure, but instead of a mass Vitamin A supplementation in Nepal, we need a health promotion intervention aiming to increase the intake of relatively cheap vegetables and fruit (containing β carotene). In addition we need better surveillance and help to identify children with Vitamin A Deficiency and provide them with Vitamin A supplements. The primary focus should be on adopting sustainable food based approaches to combat vitamin A deficiency. In Public Health terms: rather than a blanket coverage of Vitamin A supplementation to whole population we should consider a targeted intervention aimed at those who need it most

Distance Dependence in the Solar Neighborhood Age-Metallicity Relation

The age-metallicity relation for F and G dwarf stars in the solar neighborhood, based on the stellar metallicity data of Edvardsson et al. (1993), shows an apparent scatter that is larger than expected considering the uncertainties in metallicities and ages. A number of theoretical models have been put forward to explain the large scatter. However, we present evidence, based on Edvardsson et al. (1993) data, along with Hipparcos parallaxes and new age estimates, that the scatter in the age-metallicity relation depends on the distance to the stars in the sample, such that stars within 30 pc of the Sun show significantly less scatter in [Fe/H]. Stars of intermediate age from the Edvardsson et al. sample at distances 30-80 pc from the Sun are systematically more metal-poor than those more nearby. We also find that the slope of the apparent age-metallicity relation is different for stars within 30 pc than for those stars more distant. These results are most likely an artifact of selection biases in the Edvardsson et al. star sample. We conclude that the intrinsic dispersion in metallicity at fixed age is < 0.15 dex, consistent with the < 0.1 dex scatter for Galactic open star clusters and the interstellar medium.Comment: 15 pages, 5 figures, uses AASTex aaspp4 style; accepted for publication in the Astrophysical Journa

Social Entrepreneurship and Performance: The Role of Perceived Barriers and Risk

This study investigates if and in what way social entrepreneurs are hampered in turning their efforts into sustainable organizations. Using binary logit regressions and unique data containing approximately 26,000 individual-level data points for 36 countries, this

Calculation of minor hysteresis loops under metastable to stable transformations in vortex matter

We present a model in which metastable supercooled phase and stable equilibrium phase of vortex matter coexist in different regions of a sample. Minor hysteresis loops are calculated with the simple assumption of the two phases of vortex matter having field-independent critical current densities. We use our earlier published ideas that the free energy barrier separating the metastable and stable phases reduces as the magnetic induction moves farther from the first order phase transition line, and that metastable to stable transformations occur in local regions of the sample when the local energy dissipation exceeds a critical value. Previously reported anomalous features in minor hysteresis loops are reproduced, and calculated field profiles are presented.Comment: 9pages, 7 figure

Sustainable Entrepreneurship: The Role of Perceived Barriers and Risk

Entrepreneurs who start a business to serve both self-interests and collective interests by addressing unmet social and environmental needs are usually referred to as sustainable entrepreneurs. Compared with regular entrepreneurs, we argue that sustainable entrepreneurs face specific challenges when establishing their businesses owing to the discrepancy between the creation and appropriation of private value and social value. We hypothesize that when starting a business, sustainable entrepreneurs (1) feel more hampered by perceived barriers, such as the institutional environment and (2) have a different risk attitude and perception than regular entrepreneurs. We use two waves of the Flash Eurobarometer survey on entrepreneurship (2009 and 2012), which contains information on start-up motivations, start-up barriers, and risk perceptions of approximately 3000 (prospective) business owners across 33 countries. We find that sustainable entrepreneurs indeed perceive more institutional barriers in terms of a lack of financial, administrative, and informational support at business start-up than regular entrepreneurs. Further, no significant differences between sustainable and regular entrepreneurs are found in terms of their risk attitudes or perceived financial risks. However, sustainable entrepreneurs are more likely to fear personal failure than regular entrepreneurs, which is explained by their varied and complex stakeholder relations. These insights may serve as an important signal for both governments and private capital providers in enhancing the institutional climate

Quantitative Study of Magnetotransport through a (Ga,Mn)As Single Ferromagnetic Domain

We have performed a systematic investigation of the longitudinal and transverse magnetoresistance of a single ferromagnetic domain in (Ga,Mn)As. We find that, by taking into account the intrinsic dependence of the resistivity on the magnetic induction, an excellent agreement between experimental results and theoretical expectations is obtained. Our findings provide a detailed and fully quantitative validation of the theoretical description of magnetotransport through a single ferromagnetic domain. Our analysis furthermore indicates the relevance of magneto-impurity scattering as a mechanism for magnetoresistance in (Ga,Mn)As.Comment: 5 pages, 4 figures; v2: missing references included, figures recompressed to improve readabilit

Impeded industrial restructuring: The growth penalty

This paper documents that a process of industrial restructuring has been transforming the developed economies, where large corporations are accounting for less economic activity and small firms are accounting for a greater share of economic activity. Not all countries, however, are experiencing the same shift in their industrial structures. Very little is known about the cost of resisting this restructuring process. The goal of this paper is to identify whether there is a cost, measured in terms of forgone growth, of an impeded restructuring process. The cost is measured by linking growth rates of OECD countries to deviations from the optimal industrial structure. The empirical evidence suggests that countries impeding the restructuring process pay a penalty in terms of forgone growth.Dieses Diskussionspapier dokumentiert einen Strukturwandel, der zur Transformation der Wirtschaften hochentwickelter Länder führt: Großunternehmen verlieren gegenüber den kleineren Firmen relativ an Gewicht. Dieser Strukturwandel erfolgt in den einzelnen Ländern in unterschiedlichem Maße. Sehr wenig ist über die Konsequenzen bekannt, die entstehen, wenn ein Land sich dem Strukturwandel verweigert. Ziel dieses Papiers ist eine Einschätzung möglicher Kosten, die durch Behinderung des Strukturwandels entstehen. Derartige Kosten werden gemessen, indem die Wachstumsrate der OECDLänder den Abweichungen von einer "optimalen" Unternehmensstruktur gegenübergestellt werden. Die empirische Evidenz legt die Vermutung nahe, dass Länder, welche den Strukturwandel behindern, eine "Strafe" in Form von Wachstumseinbußen bezahlen

Grant writing for innovative medical research: Time to rethink

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