[en] The authors report new results on new physics searches beyond the Standard Model, on the searches for charged heavy vector boson (W(prime)), excited fermions (μ*, q*), and leptoquarks at the CDF and D0 experiments in p(bar p) collisions at √s = 1.96 TeV

[en] We present results on a search for a heavy charged vector boson, W', decaying to an electron-neutrino pair in p(bar p) collisions at √s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 205 pb^-1. We found no evidence of this decay channel, and set 95% confidence level limits on the production cross section times branching fraction assuming the light neutrino. We also set the limit on the W' boson mass at M_W' > 788 GeV/c², assuming the standard model strength couplings

[en] In this study, graphene nanosheets (GNS) were modified by 1-Butyl-3-methylimidazolium hexafluorophosphate, which is one of Ionic Liquid (IL). Owing to the modification of graphene with ionic liquids, graphene can not only be structurally stabilized, but also showed the higher charge transfer that is favor to exhibit an enhanced electrochemical performance. Also, a graphene aggregation by the intersheet van der Waals interaction can be prevented because ionic liquids act as an effective agent for the exfoliation of graphene sheets. The structural analysis of prepared composites was confirmed by transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR) and X-ray diffractometer (XRD). The electrochemical properties are studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The GNS/IL composites show a high specific capacitance (114 Fg⁻¹) compared to pristine graphene (99 Fg⁻¹) at 10 mVs⁻¹ in 6 M KOH electrolyte. Also, the prepared composites showed the enhanced electrochemical performance such as high rate capability and excellent cycle performance. Therefore, the prepared composites could be a candidate of electrode materials for supercapacitors

[en] Highlights: • Reduced graphene oxide surface was modified by introduction of ionic liquids. • Microstructure and capacitance of modified electrode were dependent on the ionic liquids contents. • Modification gives electrode better charge transport and higher specific capacitance. • Modified electrode showed the better capacitive performance such as rate capability and cycle stability. - Abstract: In this work, reduced graphene oxide (rGO)/ionic liquids (IL) composites with different weight ratios of IL to rGO were synthesized by a simple method. In these composites, IL contributed to the exfoliation of rGO sheets and to the improvement of the electrochemical properties of the resulting composites by enhancing the ion diffusion and charge transport. The structure of the composites was examined by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The TEM images showed that IL was coated on the surface of rGO in a translucent manner. The electrochemical analysis of the prepared composites was carried out by performing cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS). Among the prepared composites, the one with a weight ratio of rGO to IL of 1:7 showed the highest specific capacitance of 147.5 F g⁻¹ at a scan rate of 10 mV s⁻¹. In addition, the rate capability and cycle performance of the composites were enhanced compared to pristine rGO. These enhanced properties make the composites suitable as electrode materials for the better performance supercapacitors

[en] A new system using TiO₂ (nano-sized, band-gap 3.14 eV)-impregnated spherical ZnS (micro-sized, band-gap 2.73 eV) nano/micro-composites (Ti 0.001, 0.005, 0.01, and 0.05 mol %/ZnS) was developed to enhance the production of hydrogen from methanol/water splitting. The ZnS particles in a spherical morphology with a diameter of about 2-4 mm which can absorb around 455 nm were prepared by hydrothermal method. This material was used as a photo catalyst with loading by nano-sized TiO₂ (20-30 nm) for hydrogen production. The evolution of H₂ from methanol/water (1:1) photo splitting over the TiO₂/ZnS composite in the liquid system was enhanced, compared with that over pure TiO₂ and ZnS. In particular, 1.2 mmol of H₂ gas was produced after 12 h when 0.005 mol % TiO₂/ZnS nano/micro-composite was used. On the basis of cyclic voltammeter (CV) and UV-visible spectrums results, the high photo activity was attributed to the larger band gap and the lower LUMO in the TiO₂/ZnS composite, due to the decreased recombination between the excited electrons and holes

[en] We report new results on new physics searches beyond the Standard Model, on the searches for charged heavy vector boson (W'), excited fermions (μ^*, q^*), and leptoquarks at the CDF and D0 experiments in pp-bar collisions at √s=1.96TeV. (author)

[en] We have developed a one-step synthesis of benzofurans from o-iodophenol and various terminal alkynes, by using Pd catalyst supported on nano-sized carbon balls (NCB) under copper- and ligand free conditions. This recyclable catalyst could be reused more than 5 times in the same heteroannulation reaction. The results have demonstrated that diverse 2-substituted benzofurans with tolerant functional groups can be prepared simply and conveniently under these conditions

[en] Conversion-reaction-based anode materials for lithium ion batteries (LIBs) such as transition metal oxides have been considered as high-capacity alternatives to graphite. In the conversion reactions, interestingly, microparticles have been known to be superior to nanoparticles in terms of capacity retention along repeated cycles. In this work, a cross-linked two-component binder system of poly(acrylic acid) and carboxymethyl cellulose (PAA/CMC) was used for nanoparticular Co₃O₄. The binder was characterized by high modulus and strong bonding to the surface oxide of Co₃O₄. Even without carbon coating, the composite electrodes of nanoparticular Co₃O₄ in the presence of PAA/CMC showed significantly enhanced cycle retention with improved reversibility of the conversion reaction.

[en] In recent years, the Cu(I) complexes, with d 10 electronic configuration, have been attracting interest due to their diverse structures and photophysical properties. A copper(I) coordination polymer 1 based on a sulfur-containing pyridyl ligand L was synthesized and identified by X-ray crystallography. Photophysical and thermal properties of 1 have been investigated. More Cu(I) coordination polymers based on mixed donor ligands are under investigation in order to discover factors governing luminescence wavelength, such as Cu[BOND]Cu distances, intermolecular interactions, structures of ligands, and so on

[en] KINS has used KINS-REM (KINS-Realistic Evaluation Methodology) which developed for Best- Estimate (BE) calculation and uncertainty quantification for regulatory audit. This methodology has been improved continuously by numerous studies, such as uncertainty parameters and uncertainty ranges. In this study, to evaluate the applicability of improved KINS-REM for OPR1000 plant, uncertainty evaluation with multi-dimensional model for confirming multi-dimensional phenomena was conducted with MARS-KS code. In this study, the uncertainty evaluation with multi- dimensional model of OPR1000 plant was conducted for confirming the applicability of improved KINS- REM The reactor vessel modeled using MULTID component of MARS-KS code, and total 29 uncertainty parameters were considered by 124 sampled calculations. Through 124 calculations using Mosaique program with MARS-KS code, peak cladding temperature was calculated and final PCT was determined by the 3rd order Wilks' formula. The uncertainty parameters which has strong influence were investigated by Pearson coefficient analysis. They were mostly related with plant operation and fuel material properties. Evaluation results through the 124 calculations and sensitivity analysis show that improved KINS-REM could be reasonably applicable for uncertainty evaluation with multi-dimensional model calculations of OPR1000 plants