Shared-memory Graph Truss Decomposition

We present PKT, a new shared-memory parallel algorithm and OpenMP implementation for the truss decomposition of large sparse graphs. A k-truss is a dense subgraph definition that can be considered a relaxation of a clique. Truss decomposition refers to a partitioning of all the edges in the graph based on their k-truss membership. The truss decomposition of a graph has many applications. We show that our new approach PKT consistently outperforms other truss decomposition approaches for a collection of large sparse graphs and on a 24-core shared-memory server. PKT is based on a recently proposed algorithm for k-core decomposition.Comment: 10 pages, conference submissio

Kinetic model of carbonate dissolution in Martian meteorite ALH84001

The magnetites and sulfides located in the rims of carbonate globules in the Martian meteorite ALH84001 have been claimed as evidence of past life on Mars. Here, we consider the possibility that the rims were formed by dissolution and reprecipitation of the primary carbonate by the action of water. To estimate the rate of these solution-precipitation reactions, a kinetic model of magnesite-siderite carbonate dissolution was applied and used to examine the physicochemical conditions under which these rims might have formed. The results indicate that the formation of the rims could have taken place in < 50 yr of exposure to small amounts of aqueous fluids at ambient temperatures. Plausible conditions pertaining to reactions under a hypothetical ancient Martian atmosphere (1 bar CO2), the modern Martian atmosphere (8 mbar CO2), and the present terrestrial atmosphere (0.35 mbar CO2) were explored to constrain the site of the process. The results indicated that such reactions likely occurred under the latter two conditions. The possibility of Antarctic weathering must be entertained, which, if correct, would imply that the plausibly biogenic minerals (single-domain magnetite of characteristic morphology and sulfide) reported from the rims may be the products of terrestrial microbial activity. This model is discussed in terms of the available isotope data and found to be compatible with the formation of ALH84001 rims. Particularly, anticorrelated variations of radiocarbon with δ13C indicate that carbonate in ALH84001 was affected by solution-precipitation reactions immediately after its initial fall (ca. 13,000 yr ago) and then again during its recent exposure prior to collection

Effects of Human Capital on Farm and Non-Farm Productivity and Occupational Stratification in Rural Pakistan

This paper investigates the effects of human capital on productivity using micro panel data of rural households in the NorthWest Frontier Province, Pakistan, where a substantial job stratification is observed in terms of income and education. To clarify the mechanism underlying this stratification, the human capital effects are estimated for wages(individual level) and for self-employed activities(household level), and for farm and non-farm sectors. Estimation results show a clear contrast between farm and non-farm sectors - wages and productivity in non-farm activities rise with education at an increasing rate, whereas those in agriculture respond only to the primary education.human capital, returns to education, non-farm employment, self-employment

Biocontrol Potential of Novel Emerging Multiacting Bacterium Bacillus amyloliquefaciens NC6 against Brevicoryne brassicae in Brassica rapa ssp. Pekinensis

The emerging elicitor protein PeBA1, extracted from Bacillus amyloliquefaciens NC6, was tested against the cabbage aphid (Brevicoryne brassicae) for its biocontrol potential. Its effects on the survival, lifespan, immature development, adult reproductive performance, and pest–pathogen interaction were assessed using electrical penetration graphs (EPGs) against B. brassicae. Furthermore, the direct effects of PeBA1 with temperature and climate change in Brassica rapa ssp. Pekinensis plants were investigated by the characterization of active compounds in B. amyloliquefaciens with multi-acting entomopathogenic effects. Compared with controls, PeBA1 treatments decreased (second- and third-generation) B. brassicae population growth rates. In a host selection test, control plants were colonized faster by B. brassicae than PeBA1-treated B. rapa plants. The B. brassicae nymphal development was extended by PeBA1 concentrations. Likewise, fecundity was reduced in PeBA1-treated seedlings compared with control, with fewer offspring produced. The trichomes and wax production on PeBA1-treated leaves resulted in a hostile environment for B. brassicae. PeBA1 altered the surface structure of the leaves, reducing B. brassicae reproduction and preventing colonization. Systemic defensive processes also included the activation of pathways (JA, SA, and ET). Based on these findings against B. brassicae, integrated pest management and bio control with PeBA1 in the agroecosystem appears to be suitabl

Los ataques terroristas de Londres: impacto del 7-J en los musulmanes británicos

Este análisis examina las implicaciones de los ataques terroristas perpetrados en Londres el 7 de julio para los musulmanes británicos. El presente análisis examina las implicaciones de los atentados terroristas perpetrados en Londres el 7 de julio de 2005 para los musulmanes británicos, y plantea las distintas reacciones y percepciones suscitadas entre las comunidades musulmanas británicas en el período inmediatamente posterior a la consumación de tales atrocidades. Analiza el impacto emergente de los atentados en los musulmanes británicos, así como las modalidades de respuesta a sus inquietudes por parte de las autoridades británicas

THE IMPACT OF CORPORATE SOCIAL RESPONSIBILITY AND ETHICS IN EDUCATIONAL INSTITUTIONS

This paper presents the impact of corporate social responsibility in the educational institutions and how the students value it and try to practice it in an academic environment. Corporate social responsibility, which is now commonly known as CSR is not something mandatory, and the biggest proof of it is the fact that there is no regulator who is monitoring the implementation of CSR in a particular country or even globally.  On the contrary, a number of educational institutions are educating their students about CSR so when these students join the fresh workforce the terminology of CSR is not a misnomer to them and they can fully understand and fathom CSR from a basic as well as an advanced perspective. For this purpose a group of 4o students were selected who are undergoing the courses on CSR and corporate governance and semi structured interviews wereconducted to gather information in order to judge the impact on CSR related activities from the view point of the student community