检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Biswas, Abhijit Serles, Peter Alvarez, Gustavo A. Schimpf, Jesse Hache, Michel Kong, Jonathan Demingos, Pedro Guerra Yuan, Bo Pieshkov, Tymofii S. Li, Chenxi Puthirath, Anand B. Gao, Bin Gray, Tia Zhang, Xiang Murukeshan, Jishnu Vajtai, Robert Dai, Pengcheng Singh, Chandra Veer Howe, Jane Zou, Yu Martin, Lane W. Clancy, James Patrick Tian, Zhiting Filleter, Tobin Ajayan, Pulickel M. Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Department of Mechanical & Industrial Engineering University of Toronto 5 King’s College Road TorontoM5S 3G8 Canada Sibley School of Mechanical and Aerospace Engineering Cornell University IthacaNY14853 United States Department of Materials Science and Engineering University of California Berkeley United States Department of Materials Science and Engineering University of Toronto 184 College St TorontoM5S 3E4 Canada Department of Physics and Astronomy McMaster University HamiltonL8S 4M1 Canada Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Materials Sciences Division Lawrence Berkeley National Laboratory United States

Hexagonal boron nitride (h-BN) is brittle, however, its atomic-scale structural engineering can lead to unprecedented physical properties. Here we report the bulk synthesis of high-density crystalline h-BN solids by using high-temperature spark plasma sintering (SPS) of micron size h-BN powders. In addition to the high mechanical strength and ductile response of such materials, we have obtained anomalous values of dielectric constant beyond theoretical limits, high thermal conductivity, and exceptional neutron radiation shielding capability. Through exhaustive characterizations we reveal that SPS induces non-basal plane crystallinity, twisting of layers, and facilitates inter-grain fusion with a high degree of in-plane alignment across macroscale dimensions, resulting in near-theoretical density and anomalous properties. Our findings highlight the importance of material design, via new approaches such as twisting and interconnections between atomically thin layers, to create novel ceramics with properties that could go beyond their intrinsic theoretical predictions. © 2024, CC BY.

关键词： Spark plasma sintering

来源：评论

学校读者我要写书评

暂无评论

B(s) → D((s∗))M decays in the presence of final-state interaction

arXiv

引用

arXiv 2024年

作者： Panuluh, Albertus Hariwangsa Tanaka, Satoshi Umeeda, Hiroyuki Department of Physics Education Faculty of Teacher Training and Education Sanata Dharma University Paingan Maguwohardjo Yogyakarta55282 Indonesia Physics Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima739-8526 Japan Ibaraki prefecture Japan Center for Theoretical Physics College of Physics Jilin University Changchun130012 China China Center of Advanced Science and Technology Beijing100190 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China

In light of the recent data for B¯(s) → D((s∗))P and B¯(s) → D(s)V decays, we perform a model-independent phenomenological analysis in the presence of quasi-elastic rescattering. With the Wilson coefficients including contributions beyond the standard model, lifetimes of B meson as well as the Bd0 −B¯d0 mixing are investigated for clarifying correlations among the observables. We show that parameter regions for quasi-elastic rescattering, the size of color-suppressed tree amplitudes and new physics are constrained due to the lifetime data. As a consequence, it is revealed that this scenario can be testable by the future LHCb measurement of width difference in Bd0 − B¯d0 mixing and semi-leptonic CP asymmetry. © 2024, CC BY.

关键词： Stresses

来源：评论

学校读者我要写书评

暂无评论

TERMinator: A Neural Framework for Structure-Based Protein Design using Tertiary Repeating Motifs

arXiv

引用

arXiv 2022年

作者： Li, Alex J. Sundar, Vikram Grigoryan, Gevorg Keating, Amy E. Department of Chemistry Massachusetts Institute of Technology United States Computational and Systems Biology Program Massachusetts Institute of Technology United States Department of Computer Science Dartmouth College United States Departments of Biology and Biological Engineering Massachusetts Institute of Technology United States

Computational protein design has the potential to deliver novel molecular structures, binders, and catalysts for myriad applications. Recent neural graph-based models that use backbone coordinate-derived features show exceptional performance on native sequence recovery tasks and are promising frameworks for design. A statistical framework for modeling protein sequence landscapes using Tertiary Motifs (TERMs), compact units of recurring structure in proteins, has also demonstrated good performance on protein design tasks. In this work, we investigate the use of TERM-derived data as features in neural protein design frameworks. Our graph-based architecture, TERMinator, incorporates TERM-based and coordinate-based information and outputs a Potts model over sequence space. TERMinator outperforms state-of-the-art models on native sequence recovery tasks, suggesting that utilizing TERM-based and coordinate-based features together is beneficial for protein design. © 2022, CC BY.

关键词： Potts model

来源：评论

学校读者我要写书评

暂无评论

The Identification and Distribution Components of Polycyclic Aromatic Hydrocarbon Contaminants at the Port of Paotere, Makassar, South Sulawesi 1

The Identification and Distribution Components of Polycyclic...

引用

1st International Conference on Biotechnology and Food sciences, INCOBIFS 2020

作者： Marzuki, I. Pratama, I. Ismail, H.E. Paserangi, I. Kamaruddin, M. Chaerul, M. Ahmad, R. Department of Chemical Engineering Fajar University Panakukang-Makassar South Sulawesi90231 Indonesia Department of Mechanical Engineering Fajar University Panakukang Makassar South Sulawesi90231 Indonesia Academy of Midwifery of Tahirah Al Baeti Bulukumba District South Sulawesi92513 Indonesia Program of Infrastructure and Environmental Engineering Fajar University Makassar South Sulawesi90231 Indonesia Department of Chemistry Faculty of Science and Technology Universitas Airlangga Kampus C-UNAIR Mulyorejo Surabaya East Java60115 Indonesia

The ASTM standard recommends that the 16 most common types of PAHs are found in petroleum processing activities, the chemical industry and marine loading ports. This research aims to identify and determine the distribution of PAHs contaminants at three sampling points of seawater around Paotere Port, Makassar, South Sulawesi, using the GC-MS instrument. Sampling point A is the center of Paotere Port activity, Point B with a radius of 3 km and point C with a radius of 6 km from the center of port activity. Sampling at each point was carry out at a depth of 100 cm above sea level. There are 10 PAHs identified at sampling point A and B, while at point C there are 8 components with relatively the same type of PAHs. The dominant PAHs components at each sampling point are relatively the same, namely at point A: Pyrene, Chrysene, Benz[a]pyrene and Dibenz(a,h)anthracene, point B: Pyrene, Chrysene and Benz(a)anthtracene, while at point C only Pyrene. The total concentration of PAHs at point A: 4,217 .106 ppm, medium polluted category, at point B: 2,124 .087 ppm, medium polluted category and at point C: 1,264 . 112 ppm, light polluted category. © Published under licence by IOP Publishing Ltd.

关键词： Pyrene

来源：评论

学校读者我要写书评

暂无评论

Full-Duplex Beamforming in the Sub-Terahertz Regime

Full-Duplex Beamforming in the Sub-Terahertz Regime

引用

International Conference on Infrared and Millimeter Waves

作者： Subhajit Karmakar Atsutse Kludze Jacques Doumani Andrey Baydin Junichiro Kono Yasaman Ghasempour Department of Electrical and Computer Engineering Princeton University Princeton NJ USA Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Smalley-Curl Institute Rice University Houston TX USA Department of Physics and Astronomy Rice University Houston TX USA Department of Material Science and NanoEngineering Rice University Houston TX USA

We propose a novel architecture that realizes full-duplex directional beamforming in the sub-terahertz regime. Our architecture leverages the frequency-controlled beam steering of leaky-wave antenna together with the polarization-dependent response of aligned single-wall carbon nanotubes. We evaluate the performance of this architecture via preliminary experiments.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Betaine-cis-oleic acid based eutectic ionic liquids as green solvent for recovery of rare earth elements from red mud

Total Environment Engineering

引用

Total Environment engineering 2025年 2卷

作者： Mia Widyaningsih Ahmad Mudzakir Fitri Khoerunnisa Boon Seng Ooi Study Program of Science Education Indonesia University of Education Bandung 40154 Indonesia Study Program of Chemistry Indonesia University of Education Bandung 40154 Indonesia School of Chemical Engineering Universiti Sains Malaysia Nibong Tebal Penang 14300 Malaysia

This research aims to develop environmentally friendly Eutectic Ionic Liquids (EILs) having superior performance in recovering Rare Earth Elements (REEs) from red mud. The EILs were synthesized through the solvometallurgy method, with molar ratios of betaine: cis-oleic acid ranged from (1:1) to (1:7). The optimum composition of EILs was determined by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared (FTIR) spectroscopy, and solubility test. The performance of EILs in REEs extraction from red mud was conducted at various compositions ratio of EILs to red mud, temperatures, and times. The results showed that EILs was successfully synthesized at optimum composition of betaine: cis-oleic acid (1:4) as indicated by the formation of the lowest eutectic point, modification of hydrogen bonding in cis-oleic acid and betaine, and highest solubility level of EILs in methanol. The structure of synthesized EILs was confirmed by Nuclear Magnetic Resonance (NMR). The optimum recovery of REEs from red mud were found at composition EILs: red mud (20 mL:1 g), 80 °C, and 48 h, with recovery percentage of 50.86 %, 55.68 %, 53.93 %, 81.65 %, and 86.62 %, for Sc , Ce, Eu, Er, and Y, respectively, as verified by X-ray Fluorescence (XRF). The emergence of a new orthorhombic and modification of monoclinic (gibbsite), trigonal, hexagonal (Quartz) crystal structures of red mud after extraction were observed by the X-ray Diffraction (XRD). The modification in morphology and composition of red mud due to extraction were verified by Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The NMR spectra confirmed that EILs has great recyclability and structure stability after used in red mud extraction. It can be inferred that the betaine-cis oleic acid based EILs are being potential as environmentally friendly solvent for REEs recovery.

关键词： Green solvent Eutectic Ionic liquids (EILs) Betaine Cis-oleic acid Rare earth element (REEs)

来源：评论

学校读者我要写书评

暂无评论

Direct insulator to relativistic quantum Hall transition in graphene

引用

Physical Review B 2023年第20期108卷 205304-205304页

作者： Ching-Chen Yeh Pin-Chi Liao Dinesh K. Patel Wei-Chen Lin Siang-Chi Wang Albert F. Rigosi Randolph E. Elmquist Chi-Te Liang Department of Physics National Taiwan University Taipei 106 Taiwan Physical Measurement Laboratory National Institute of Standards and Technology (NIST) Gaithersburg Maryland 20899 USA Physikalisch-Technische Bundesanstalt (PTB) Bundesallee 100 Braunschweig 38116 Germany Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Center for Quantum Science and Engineering National Taiwan University Taipei 106 Taiwan Taiwan Consortium of Emergent Crystalline Materials (TCECM) Taipei 106 Taiwan

We present evidence of the direct insulator-quantum Hall transition in monolayer epitaxial graphene, a genuine two-dimensional (2D) system. We studied the transition from an insulating state to a quantum Hall state at a high Landau level filling factor ν=6>3 and the plateau-plateau transition from ν=6 to ν=2. Using scaling theory, the critical exponent κ was determined to be 0.41±0.02 for the direct insulator-quantum Hall transition. This closely aligns with κ=0.42±0.02 from the ν=6 to ν=2 quantum Hall plateau-plateau transition. These findings suggest that the two transitions may belong to the same universality class. While similar transitions have been explored in conventional two-dimensional charge systems, our study provides valuable insights into a truly 2D system, deepening our understanding of these transitions.

关键词： Electrical properties Fermions Landau levels Graphene Hall bar Resistivity measurements

来源：评论

学校读者我要写书评

暂无评论

Assessing the potential for producing compost pellets with binders from cassava industry by-products and supplemented with Trichoderma

引用

Case Studies in Chemical and Environmental engineering 2025年 11卷

作者： Juntahum, Suchat Klinsukon, Chaiya Senawong, Kritsadang Katekaew, Somporn Sokudlor, Nuttaphon Laloon, Kittipong GMS Food Energy Water Security Research Institute Khon Kaen University Khon Kaen 40002 Thailand Postharvest Technology Innovation Center Science Research and Innovation Promotion and Utilization Division Office of the Ministry of Higher Education Science Research and Innovation Bangkok 10400 Thailand Department of Microbiology Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand Innovative Agricultural Program Faculty of Agricultural Khon Kaen University 40002 Thailand General Education Teaching Institute Khon Kaen University Khon Kaen 40002 Thailand Department of Biochemistry Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand Department of Agricultural Engineering Faculty of Engineering Khon Kaen University Khon Kaen 40002 Thailand Agricultural Machinery Research Center at Khon Kaen University Khon Kaen 40002 Thailand

Agricultural waste recycling enhances soil health and crop productivity sustainably. Composting, which reclaims waste, combined with Trichoderma-supplemented pelleting technologies improve usability and biocontrol for plant disease suppression. The objective of this study was to develop cow manure compost pellets enriched with T. hamatum and biochar using cassava byproduct binders (peel, tuber, and starch), and compare them with binder-free pellets. After composting, these mixtures were pelletized using a flat-die pellet mill and evaluated for their physical properties, plant growth promotion, and biocontrol potential. Composting produces nutrient-rich and non-phytotoxic materials suitable for pelleting. The addition of binders improved production efficiency, reduced energy consumption, and enhanced pellet properties such as size, density, durability, and wettability. Among the binders, tubers achieved the highest pellet density (1298.04 kg m⁻³), whereas cassava starch resulted in the best formation (95.40 %) and durability (95.88 %). Mixing biochar helped to maintain pellet porosity, which facilitated solubility and nutrient release upon application. T. hamatum germination from pellets inhibited Sclerotium rolfsii growth by 62.5 % in vitro. Pellet application reduced S. rolfsii-induced disease severity by 77.4 %, enhanced plant growth and biomass, and increased soil nitrogen (32.2 %), phosphorus (38.9 %), and potassium (38.9 %) content in pot trials. These findings highlight the role of Trichoderma and biochar in compost pellets as sustainable bio-fungicides and soil enhancers. This study provides a foundation for optimizing compost pellets by utilizing agro-waste binders to improve pellet quality and agricultural applications. © 2025

关键词： Agricultural waste Biochar Compost Pelletization Plant pathogens Trichoderma

来源：评论

学校读者我要写书评

暂无评论

Gaps and Data Ambiguities in DNA Reference Libraries: A Limiting Factor for Molecular-Based Biodiversity Assessments Using Annelids as a Case Study

引用

Ecology and Evolution 2025年第6期15卷

作者： Marcos A. L. Teixeira Eva Aylagas John K. Pearman Susana Carvalho Biological and Environmental Sciences and Engineering Division (BESE) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Cawthron Institute Nelson New Zealand Marine Science Program King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia

Regional DNA reference libraries are essential to improve the accuracy of molecular-based biodiversity assessments, species identification and conservation. However, these libraries are often incomplete, limiting the full potential of molecular tools. In this study, we evaluated the completeness of DNA barcode reference data for annelids from the Red Sea, Arabian Gulf and Gulf of Oman and examined its implications for biodiversity assessments. A database of 2291 worldwide annelid species and 3131–4047 Molecular Operational Taxonomic Units (MOTUs) was compiled from the Barcode of Life Data System (BOLD). Two regional checklists -OBIS (498 species) and Wehe & Fiege (892 species)—were cross-referenced against this database to identify coverage gaps and taxonomic inconsistencies. Only 24% and 23% of species in each checklist, respectively, had corresponding barcodes, and just three species were sampled from the region. Additionally, 43% of BOLD's Barcode Index Numbers (BINs) revealed taxonomic ambiguities. To further assess local annelid biodiversity, we analysed a metabarcoding dataset from 135 Autonomous Reef Monitoring Structures (ARMS) deployed on shallow reefs in the region. This yielded 5375 Amplicon Sequence Variants (ASVs), with 55% classified only to class or phylum level. Of the 1350 MOTUs identified, either none to just 14 species-level identifications were found depending on the taxonomic classification method and database, 10 of which appear to be cryptic species complexes. Based on proposed MOTU/species ratios, we estimate approximately 992 annelid species in the ARMS dataset, highlighting underexplored regional diversity. Manual inspection of clustered ASVs also revealed potential pseudogene artifacts, taxonomic misidentifications up to the class level and underestimation of species matches due to discordant MOTUs. These findings underscore the urgent need to expand regional reference libraries, apply integrative taxonomy and implement refined, user-defin

关键词： Annelida Arabian gulf ARMS coral reefs eDNA Gulf of Oman metabarcoding MtCOI-5P Red Sea

来源：评论

学校读者我要写书评

暂无评论

Effect of Applied Potential on the Surface Energy, Wulff Shape and Charge Distribution of Metal Surfaces

SSRN

引用

SSRN 2022年

作者： Alsunni, Yousef A. Musgrave, Charles B. Chemical Engineering Department King Fahd University of Petroleum and Minerals Dhahran31261 Saudi Arabia Department of Chemical and Biological Engineering University of Colorado Boulder BoulderCO80309 United States Renewable and Sustainable Energy Institute University of Colorado Boulder BoulderCO80309 United States Materials Science and Engineering Program University of Colorado Boulder BoulderCO80309 United States

In this work, we use grand canonical density functional theory to predict the surface energies, Wulff shapes, charge distributions and catalytically active sites of different metal surfaces under electrochemical conditions. We propose a method for computing surface energies from grand canonical density functional theory (GC-DFT) calculations of periodic slab models and use it to predict the surface energies of the facets of Pt, Cu and Ag crystals to predict their Wulff shapes under electrochemical conditions. Our results predict that solvation and the applied potential only slightly affect the Wulff shape of the pure metals studied. We used Bader charge analysis of GC-DFT computed electron densities to investigate the effect of the applied potential on the distribution of electron density over the atoms of the surfaces of Pt, Cu, Ag and the 75-25 Ag-Pt and Au-Ni alloys. This analysis shows that, under an applied potential, charges are not evenly distributed over the surface atoms and that the charges of less coordinated atoms are more sensitive to bias. Our results also show that the most sensitive atom to bias can be used to identify the most favorable adsorption site and thus, the active sites of electrochemical reactions. © 2022, The Authors. All rights reserved.

关键词： Density functional theory

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：