191,030 research outputs found
Commuting powers and exterior degree of finite groups
No full texthttps://koreascience.or.kr/article/JAKO201219240565536.pag
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Towards understanding environmental and cumulative impacts of floating wind farms: Lessons learned from the fixed-bottom offshore wind farms
Full text linkRenewable energy sectors have been rapidly growing over the last three decades due to the environmental
concerns regarding fossil fuels and increasing demand of energy by human. Among those, offshore wind farms are one of the most attractive and promising technologies for clean energy production due to the strong and steady offshore winds, less turbine fatigue, less visual and space limitations compared to onshore wind farms. Rapid development of offshore wind farms, which is expected to reach 70% by 2030, can effect on marine ecosystems and organisms. Hitherto, different studies have comprehensively discussed the potential impacts of offshore wind farms on marine habitats; however, they are just potential and rarely validated through observations. This review focuses on the proved environmental impacts of offshore wind farms gained from postconstruction environmental monitoring programs. Particularly, this study provides significant insights on: 1) the area and time span over which biological effects may occur, 2) responses to disturbance by different target organisms; 3) quantification of short/long-term effects; 4) recovery from impacts in the long term. The monitoring studies showed little or only local impacts of offshore wind farms on the marine environment, either during their construction or the operational phases. However, further research is needed to answer whether synergies of little and local impacts may determine consequences at the population level. As the number and size of offshore wind farms increase it is necessary to consider consequences at the population level as well as cumulative
impacts of these activities on marine ecosystems
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Entrepreneurial Competencies Benefiting Entrepreneurial Intention:Iranian Adults at Home and in the Diaspora
No full textIran is the second largest economy and the second largest population in the Middle East and North Africa (MENA) region, with a stubbornly high unemployment rate of 11.7% in 2015 (The World Bank in The internet users 2015). Entrepreneurship could be a part of the solution to the high unemployment rate in Iran. As a matter of fact, the Iranian diaspora seizes influential positions in technology, business, and financial industries in Europe and North America. Our study is to answer whether the place of residence has an impact on entrepreneurial competencies and entrepreneurial intention, and to examine the relation between entrepreneurial competencies and entrepreneurial intention by providing a comparative study of two groups-Iranian adults in Iran and Iranian diaspora. Using a sample of 3169 native-born Iranian adults in Iran and a sample of 361 Iranian diasporas who are fairly representative of the Iranian diaspora, we find that entrepreneurial competencies in the form of self-efficacy, risk-opportunity and role modeling are more prevalent among Iranian adults at home, but opportunity- alertness is less prevalent among Iranian adults at home. We also found that Iranian adults at home are more likely to start a business compared to the Iranian diaspora. Astonishingly, our study shows that entrepreneurial competency in the form of risk-propensity does not benefit entrepreneurial intention. Only entrepreneurial competency in the form of self-efficacy benefits entrepreneurial intention (in the form of intending phase and starting phase) regardless of where Iranians reside.</p
A Class of Implicit Transmission Techniques for Throughput Enhancement
No full textThroughput enhancing techniques are very valuable to keep up with the fast increasing data
rates in communication systems. Implicit transmission is particularly attractive as it can
transmit information without physically transmitting them over a channel. In this study,
two separate throughput enhancing techniques using implicit transmission are investigated.
First a multi-constellation signaling (MCS) technique that selects one out of N(> 1) constellations based on a set of implicit bits during every interval is introduced. The overall
constellation used by a MCS scheme is a NM-ary constellation formed by replacing every
point of a M-ary constellation by a cluster with N constellation points. Further, the size
of clusters is reduced by employing multi-dimensional mapping. It is demonstrated that
a properly designed MCS scheme can double and triple the throughput and also perform
better than a scheme that employs a single constellation, and MCS schemes can perform
better than turbo coded signals in the long term evolution (LTE).
In contrast to MCS schemes, throughput enhancing concatenated codes (TECCs) schemes
transmit bits implicitly without expanding the overall constellation. In a TECC, the coded
sequence of a code C transmitted over a channel is altered according to the coded bits of a
second coded sequence of an implicit code C’. In this study, TECCs select one bit in every
segment of n coded bits of C based on ns ≤ log2n coded bits of C’, and flip that selected coded
bit of C before transmission. It is shown that using iterative decoding between codes C and
C’, the receiver can decode the coded bits of both the explicit code C and the implicit code
C’ jointly. TECCs that can increase the throughput of C by 25% to 37.5% without sacrificing
the performance of C are reported, however, at the expense of increased complexity.
TECCs are extended to form a new class of TECC-2 schemes to include a second uncoded
implicit stream. It is shown here that TECC-2 schemes can significantly increase the throughput enhancing capability of TECCs at high signal to noise ratio (SNR) with only a modest
increase in complexity. The tradeoff between the low SNR performance and throughput
expansion is also discussed
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Data for publication: "Dynamic behavior of shear-thickening tluids under harmonic excitation: an experimental investigation"
No full textThe dataset accompanying the publication "Dynamic Behavior of Shear-Thickening Fluids under Harmonic Excitation: An Experimental Investigation" is now provided exclusively as a single archive:STF Dynamic Behavior Analysis: MATLAB CodeThis repository contains the MATLAB code and all accompanying files inside Suplimentary material.zip and the separate ZIP file “Experimental Paper_Mechanical Systems and Signal Processing_Elsevier.zip,” associated with the paper:"Dynamic Behavior of Shear-Thickening Fluids under Harmonic Excitation: An Experimental Investigation"OverviewThese scripts process experimental data, perform parameter identification for the oscillator system, and generate figures demonstrating the dynamic behavior of shear-thickening fluids (STFs) under harmonic excitation.PrerequisitesMATLAB (R2019b or newer recommended)Inside Supplementary_material.zip, you will find:All .txt experimental data files:RecordedExperimentalDataWithoutSTFOmega0.txtRecordedExperimentalDataWithoutSTFOmegaIncreasingRate0_047.txtRecordedExperimentalDataWithSTFOmegaIncreasingRate0_0333.txtRecordedExperimentalDataWithSTFOmegaConstant8_2.txtRecordedExperimentalDataWithSTFOmegaConstant11_3.txtThe main MATLAB scripts and auxiliary functions for data processing, parameter identification, and figure generation.Any related documentation (including the paper PDF, if applicable).Execution StepsFollow these steps to process the data and generate all figures:1. Data FiltrationRun prepare_mat_data.mProcesses raw experimental data exported from LabVIEW.Applies polynomial fitting to compute rotation speed, velocity, and acceleration.Generates .mat files containing the filtered data for further analysis.2. Free Vibration Parameter IdentificationRun identOscDyn_freeMotion.mUses Nelder-Mead optimization to determine stiffness (k), damping (c), and friction (T) parameters.Minimizes the objective function (Eq. 14) to match simulation with experimental data.Generates Figure 3 comparing simulation vs. experiment.Saves identified parameters in par0.3. Forced Vibration Parameter Identification and Figure GenerationRun identOscDyn_forcedMotion.mBuilds on free-vibration parameters for forced vibration.Generates Figures 4–8, showing:Excitation frequency vs. time (Fig. 4)Resistance force vs. velocity (Fig. 5)Displacement comparison (Fig. 6)Velocity comparison (Fig. 7)Frequency response (Fig. 8)Saves refined parameters to par1.4. Additional FiguresAutomatic generation of:Figure 13: STF force relationships in the resonance region (Section 6.1.2).Figure 15: Time histories in the post-resonance region (Section 6.1.3).Figure 16: STF force relationships in the post-resonance region (Section 6.1.3).Figure 17: STF behavior at constant excitation frequency (Section 6.1.3).Figure 18: Frequency response comparison with and without STF (Section 6.2).TroubleshootingPath Issues: Keep all files in the same directory or update path references in the scripts.Optimization Variability: Multiple runs may be needed due to the stochastic nature of Nelder-Mead.Memory Constraints: For large datasets, reduce data size or increase MATLAB’s allocated memory.Additional InformationFor questions or issues regarding the code, please contact the corresponding author as indicated in the paper.© 2025 | All rights reserved by the authors of"Dynamic Behavior of Shear-Thickening Fluids under Harmonic Excitation: An Experimental Investigation."Additional Note: Paper Source FilesAlso included in this repository is a second ZIP file, “Experimental Paper_Mechanical Systems and Signal Processing_Elsevier.zip,” containing:elsarticle-template folderElsevier’s LaTeX class/template files (e.g., elsarticle.cls and elsarticle-template.tex).Figure 1.jpg through Figure 18.jpgHigh-resolution figures referenced in the manuscript (see image in the screenshot: 18 total JPG files).mybibfile.bibA BibTeX reference database, ensuring proper citation management.These items allow you to compile the full manuscript (in LaTeX) for submission to Mechanical Systems and Signal Processing (Elsevier), with all figures and references properly linked.</p
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