1,721,855 research outputs found
Erratum: Step energy and step interactions on the reconstructed GaAs(001) surface (Physical Review B - Condensed Matter and Materials Physics (2014) 90 (115314) DOI: 10.1103/PhysRevB.90.115314)
No full textWe report here the corrected values for the step energies and the step interactions calculated in our paper for a large set of different step configurations. We have found that one parameter, i.e., the smearing parameter governing the band occupation around the Fermi level, was not converged enough to predict the step properties with sufficient accuracy. Since the surfaces are metallic a smearing function had to be used for the state occupation around the Fermi level. We used the smearing function proposed by Marzari and Vanderbilt. We found that the parameter entering this expression is a particularly sensitive one. The previous paper used a commonly chosen value of 0.02 Ry. However, we found that a much smaller value for this parameter was necessary to obtain well converged values for the surface energies. The convergence of the smearing parameter has been carefully checked. Figure presented
Estimates of the unreported economy in India
Full text linkThis paper presents estimates of India's unofficial economy on a yearly basis for the period 1967 to 1978. These estimates implicitly revise the GNP, per capita and other related statistics for this period. The technique employed has been recently used to determine the size of the unreported economies in U.S.A. and Canada. The results indicate that the unreported activity as a proportion of official GNP has grown from 9.5 per cent in 1967 to nearly 49 per cent by 1978. High taxes have contributed significantly to the growth of the unofficial economy. A 1 per cent increase in overall taxes leads to more than 3 per cent increase in the unofficial economy relative to the official economy.
Erratum to: Switching of mesodermal and endodermal properties in hTERT-modified and expanded fetal human pancreatic progenitor cells
Full text linkSi and Ge based metallic core/shell nanowires for nano-electronic device applications
Full text linkOne dimensional heterostructure nanowires (NWs) have attracted a large attention due to the possibility of easily tuning their energy gap, a useful property for application to next generation electronic devices. In this work, we propose new core/shell NW systems where Ge and Si shells are built around very thin As and Sb cores. The modification in the electronic properties arises due to the induced compressive strain experienced by the metal core region which is attributed to the lattice-mismatch with the shell region. As/Ge and As/Si nanowires undergo a semiconducting-to-metal transition on increasing the diameter of the shell. The current-voltage (I-V) characteristics of the nanowires show a negative differential conductance (NDC) effect for small diameters that could lead to their application in atomic scale device(s) for fast switching. In addition, an ohmic behavior and upto 300% increment of the current value is achieved on just doubling the shell region. The resistivity of nanowires decreases with the increase in diameter. These characteristics make these NWs suitable candidates for application as electron connectors in nanoelectronic devices
Introduction: Breeding Climate Resilient and Future-Ready Pulse Crops
No full textPulse crops are widely cultivated and consumed across the globe, playing a vital role as key sources of protein and other essential nutrients. Many traditional and modern culinary dishes rely heavily on staple pulse crops like chickpea, lentil, mung bean, pigeon pea and black gram, while some pulses have industrial uses. This compilation explores the latest advancements in breeding pulse crops to make them resilient to climate change, with an emphasis on improving resistance to biotic and abiotic stresses, along with yield traits. The varietal development process is becoming more efficient and precise thanks to new methods such as genome editing, genomic selection, haplotype-based breeding and speed breeding, which also help in reducing resource utilisation. Also, to further enhance production, there is a need to focus on adopting artificial intelligence (AI) and machine learning (ML)-driven breeding tools, thereby lowering developmental costs and saving time. The current challenge is to effectively integrate and apply these advanced techniques and methods into ongoing crop improvement initiatives
Tectonic significance of Cenozoic exhumation and foreland basin evolution in the Western Alps
No full textThe Alps are the archetypical collisional orogenic system on Earth and yet our understanding of processes controlling topographic growth in the Cenozoic remains incomplete. Whereas ideas and models on the Alps are abundant, data from the foreland basin record able to constrain the timing of erosion and sedimentation, mechanisms of basin accommodation and basin deformation are sparse. We combine seismic stratigraphy, micropaleontology, white mica 40Ar/39Ar, detrital zircon (U-Th)/He and apatite fission track thermochronology to Miocene-Pliocene samples from the retro-wedge foreland basin (Saluzzo Basin in Italy) and to Oligocene-Miocene sedimentary rocks from the pro-wedge foreland basin (Bârreme Basin in France) of the Western Alps. Our new data show that exhumation in the Oligocene-Miocene was non uniform across the Western Alps. Topographic growth was underway since the Oligocene and exhumation was concentrated on the pro-side of the orogenic system. Rapid and episodic early Miocene exhumation of the Western Alps was concentrated instead on the retro-side of the orogen and correlates with a major unconformity in the proximal retro-foreland basin. A phase of orogenic construction is recorded by exhumation of the proximal pro-foreland in both the Central and Western Alps at ca. 16 Ma. This is associated with high sedimentation rates, and by inference erosion rates, and suggests that an increase in accretionary flux associated with the dynamics of subduction of Europe under Adria controlled orogenic expansion in the Miocene
Potential of Bioengineering Processes for Therapeutic Repopulation of the Liver with Cells
No full textIntroduction: Breeding Climate-Resilient and Future Ready Oilseed Crops
No full textOilseed crops are cultivated and consumed globally on a large scale and have been the major sources of fat and protein. The food preparations and different delicacies are completely dependent on the oilseed crops. Few of these oilseed crops have industrial applications as well; however, our focus is on major oilseed crops such as soybean, sunflower, groundnut, brassica, canola, coconut, oil palm, and rapeseed. This book provides the current status of breeding climate-resilient oilseed crops, keeping in mind nutrition and quality. Availability of multiple advanced tools and technologies to fasten and making the development process more precise, leading to a reduction in resource use. Further attention is warranted to make these crops more mechanized in order to lower the cost of production as well as saving the time. The challenge is now to integrate and implement these advanced technologies, and methods in the ongoing crop improvement programs
NOXA contributes to the sensitivity of PERK-deficient cells to ER stress.
No full textPKR-like ER kinase (PERK) deficient mouse embryonic fibroblasts (MEFs) are hypersensitive to ER stress-induced apoptosis. However, the molecular determinants of increased sensitivity of PERK(-/-) MEFs are not clearly understood. Here we show that induction of several Unfolded Protein Response (UPR) target genes is attenuated in PERK(-/-) MEFs. We also report elevated expression of the BH3-only protein, NOXA in PERK(-/-) MEFs. Further, shRNA-mediated knockdown of NOXA rescued the hypersensitivity of PERK(-/-) MEFs to ER stress-induced apoptosis. Taken together our results suggest that compromised induction of UPR and increased NOXA expression contributes to hypersensitivity of PERK(-/-) MEFs to ER stress-induced apoptosis
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