Photoluminescence lineshape of ZnO

The merger of the absorption coefficient dispersion, retrieved from transmission by the modified Urbach rule introduced by Ullrich and Bouchenaki [Jpn. J. Appl. Phys. 30, L1285, 1991], with the extended Roosbroeck-Shockley relation reveals that the optical absorption in ZnO distinctively determines the photoluminescence lineshape. Additionally, the ab initio principles employed enable the accurate determination of the carrier lifetime without further specific probing techniques

Sulfonated Styrene-(ethylene-co-butylene)-styrene/Montmorillonite Clay Nanocomposites: Synthesis, Morphology, and Properties

Sulfonated styrene-(ethylene-butylene)-styrene triblock copolymer (SSEBS) was synthesized by reaction of acetyl sulfate with SEBS. SSESB-clay nanocomposites were then prepared from hydrophilic Na-montmorillonite (MT) and organically (quaternary amine) modified hydrophobic nanoclay (OMT) at very low loading. SEBS did not show improvement in properties with MT-based nanocomposites. On sulfonation (3 and 6 weight%) of SEBS, hydrophilic MT clay-based nanocomposites exhibited better mechanical, dynamic mechanical, and thermal properties, and also controlled water–methanol mixture uptake and permeation and AC resistance. Microstructure determined by X-ray diffraction, atomic force microscopy, and transmission electron microscopy due to better dispersion of MT nanoclay particles and interaction of MT with SSEBS matrix was responsible for this effect. The resulting nanocomposites have potential as proton transfer membranes for Fuel Cell applications

A spectroscopic survey of biased halos in the reionization era (ASPIRE): a first look at the rest-frame optical spectra of z > 6.5 quasars using JWST

Large scale structure and cosmolog

A spectroscopic survey of biased halos in the reionization era (ASPIRE): JWST reveals a filamentary structure around a z = 6.61 quasar

Large scale structure and cosmolog

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A hybrid ensemble learning-based prediction model to minimize delay in air cargo transport using bagging and stacking

Manufacturing productivity is inextricably linked to air freight handling for the global delivery of finished and semi-finished goods. In this article, our focus is to capture the transport risk associated with air freight which is the difference between the actual and the planned time of arrival of a shipment. To mitigate the time-related uncertainties, it is essential to predict the delays with adequate precision. Initially data from a case study in the transportation and logistics sector were pre-processed and divided into categories based on the duration of the delays in various legs. Existing datasets are transformed into a series of features, followed by extracting important features using a decision tree-based algorithm. To predict the delay with maximum accuracy, we used an improved hybrid ensemble learning-based prediction model with bagging and stacking enabled by characteristics like time, flight schedule, and transport legs. We also calculated the dependency of accuracy on the point in time during business process execution is examined while predicting. Our results show all predictive methods consistently have a precision of at least 70 percent, provided a lead-time of half the duration of the process. Consistently, the proposed model provides strategic and sustainable insights to decision-makers for cargo handling

Ocorrência de Hyblaea puera (Cramer, 1777)(Lepidoptera: Hyblaeidae) em teca no Brasil Occurrence of the teak defoliator Hyblaea puera (Cramer, 1777) (Lepidoptera: Hyblaeidae) in teak (Tectona grandis L.f.) in Brazil

Relata-se a ocorrência de Hyblaea puera (Cramer, 1777) em povoamentos homogêneos de teca, Tectona grandis L.f., no Brasil. Infestações dessa praga foram observadas em reflorestamentos localizados nos municípios de Cáceres e Rosário Oeste, Estado de Mato Grosso. Cita-se, também, a ocorrência deste lepidóptero em outras localidades brasileiras: Chapada dos Guimarães (MT), Nobres (MT), Jataí (GO), Dourados (MS) e Rio de Janeiro (RJ).<br>The occurrence of the Hyblaea puera (Cramer, 1777) in homogeneous plantations of teak, Tectona grandis L.f., in Brazil, is reported here. Infestations of this pest were observed in the districts of Cáceres and Rosário Oeste, State of Mato Grosso, Brazil. The occurrence of this moth is also registered in other Brazilian areas such as: Chapada dos Guimarães and Nobres (State of Mato Grosso), Jataí (State of Goiás), Dourados (State of Mato Grosso do Sul) and Rio de Janeiro (State of Rio de Janeiro)

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Not AvailableGoat constitutes almost 42.1 % of the total livestock population of the A & N islands. Generally the livestock are free from many dreaded diseases which are prevalent in mainland, India. However, in the present study the outbreak of contagious ecthyma (Orf) in goats of Andaman and Nicobar Islands was investigated and confirmed by PCR assay. The outbreak of orf was reported from different villages of the South Andaman. A total of 171 clinical cases of contagious ecthyma were reported during the different outbreak reported during the year 2017. The scab samples from the affected goats were collected and processed for extraction of viral DNA. Nested PCR assay was done by using the forward and reverse primers of parapox virus. The results revealed the confirmation of the outbreak of Contagious ecthyma (orf) virus in the goats of Andaman & Nicobar Islands for the first timeNot Availabl