12,163 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Supplemental Material, Additional_File_1 - Quality Appraisal of Guidelines on Cancer-Associated Thrombosis Using AGREE II Instrument and Analysis of Current Status of New Oral Anticoagulants
No full textSupplemental Material, Additional_File_1 for Quality Appraisal of Guidelines on Cancer-Associated Thrombosis Using AGREE II Instrument and Analysis of Current Status of New Oral Anticoagulants by Jiuxing Zhang, Juan Xu, Wenlong Zhang, Meiting Jiang, Juan Liu, Lei Xu, Gaofeng Liu and Zhigang Zhao in Clinical and Applied Thrombosis/Hemostasis</p
Fluid inclusion study of the Gaofeng tin-polymetallic deposit in the Dachang ore field, Guangxi, China
No full textThe Dachang tin-polymetallic district, Guangxi, China, is one of the largest tin ore district in the world and contains the Lamo Zn-Cu proximal skarn deposit, the Tongkeng-Changpo and Gaofeng tin-base metal deposits, and the Huile and Dafulou black shale-hosted cassiterite-sulfide deposits. They are hosted by Devonian carbonate-rich sediments near the underlying Cretaceous (91 similar to 96Ma) Longxianggai granite. The Gaofeng deposit in the district occurs in the Middle Devonian reef limestone with higher grade ore and giant resource of Sn. The mineralization includes the early ore stage of cassiterite-arsenopyrite-pyrrhotite and the late ore stage of carbonate-sulfide-sulfosalt. Petrography, microthermometry, and Laser Raman spectroscopy, combined with scanning electron microscope-cathodoluminescence (SEM-CL) analyses of fluid inclusions are used to characterize the chemical evolution of ore fluids at the Gaofeng deposit. Two types of fluid inclusions are recognized in quartz and cassiterite : CO2-CH4 vapor-rich fluid inclusions are mainly observed in quartz and cassiterite associated with cassiterite-arsenopyrite-pyrrhotite stage and have high homogenization temperatures of 360 similar to 410 degrees C and salinities of 3% similar to 6% NaCleqv, whereas two-phase, liquid-rich aqueous fluid inclusions only occur in quartz related to sulfide-sulfosalt-carbonate stage and have relatively low homogenization temperatures ranging from 270 to 310 degrees C and salinities of 3% similar to 6% NaCleqv. The range of salinity for all fluid inclusions is similar to those of CO2 vapor-rich fluid inclusions (7% similar to 9% NaCleqv) in diopside and garnet in the Lamo skarn Zn-Cu deposit nearby the Gaofeng deposit. Oxygen and hydrogen isotopes of ore fluids from quartz and cassiterite indicate magmatic water in origin. Base on the physical and chemical evolution of ore fluids, it is concluded that the mineralizing fluids for the Gaofeng deposit were probably derived from intermediate density, supercritical single-phase fluid that exsolved from the deep crystallizing granite. This magmatic fluid reacted with carbonate-rich host rocks in the depth that led to phase segregation to form brine and vapor-like fluid. Vapor contraction and cooling of vapor-like fluids may deposit cassiterite and arsenopyrite, and followed by sulfides and sulfosalts at the Gaofeng deposit
Raw data of Zhao et al., 2022, Geoderma
No full textRaw data associated with Zhao et al., 2022, Geoderma. Any use of the data set should be approved by the corresponding author Kai Yue at "[email protected]".</p
Near-Field Radiated from Carbon Nanotube and Graphene-Based Nanointerconnects
No full textThe electromagnetic field radiated by Cu-graphene interconnects is predicted in the frequency domain using the equivalent single conductor formulation, and it is compared with the field radiated by a single-wall carbon nanotube (SWCNT) bundle interconnect having the same cross section. The effect of the frequency, of the configuration, of the graphene, and SWCNT mean free paths is investigated. The scope is to predict the risk of electromagnetic interference against nearby components and devices, and to define the most critical conditions
Secure satellite-vehicle communications with randomly distributed vehicles on different roads
No full textRecent progress of nano-electromagnetic compatibility (nano-EMC) in the emerging carbon nanoelectronics
No full textThis paper presents a selection of research topics related to nano-electromagnetic compatibility (nano-EMC) issues in emerging carbon nanoelectronics. Carbon-based nano-interconnect modeling and analysis are first introduced. Then, the key techniques of carbon nanotube-filled through-silicon vias and carbon- based passive devices are discussed
Development of Micro-Macro Continuum-Discontinuum Coupled Numerical Method
No full textA micro-macro and continuum-discontinuum coupled model and corresponding computer codes are developed in this thesis for rock dynamics study. Firstly, a new micromechanical model for describing the elastic continuum based on the underlying microstructure of material is proposed. The model provides a more general description of material than linear elasticity. Then, a numerical model Distinct Lattice Spring Model (DLSM) is developed based on the RMIB theory. The new proposed model has the advantages of being meshless, and automatic continuum description through underlying discontinuum structure and directly using macroscopic elastic parameters. Following this, the multi-scale DLSM (m-DLSM) is proposed to combine DLSM and NMM. The proposed model uses a tri-layer structure and the macro model can be automatically released into micro model during calculation. Forth ward, the ability of DLSM on modeling dynamic failure is studied. A damage based micro constitutive law is developed. Relationships between the micro constitutive parameters and the macro mechanical parameters of material are provided. The micro parameters can directly be obtained from macro experimental results, i.e., tensile strength and fracture energy, through these equations. Moreover, the ability of DLSM on modeling wave propagation is enhanced and verified. Non-reflection boundary condition and methods to represent discontinuity in DLSM are developed. Finally, the parallelization of DLSM and 2D implicit DLSM are introduced. The main achievements of the whole PhD work and future research works are summarized and prospected in the conclusion part of the thesis.LM
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