4,182 research outputs found
A collection of global geotagged tweets with COVID-19 related mentions since January 2020
No full textA dataset of over 1.97 million global geotagged tweets that contain COVID-19 related keywords or hashtags, updated weekly from January 15 to December 31, 2020, as well as the summary of totals by national and subnational levels. All individual tweet data are geotagged at national levels, and US tweets are geotagged at subnational levels. (2021-11-30
Estimation of Twitter user demographics in the USA, 2014
No full textThe dataset contains the estimated demographics of 3,775,014 Twitter users in the continental USA in 2014, including gender, age, race/ethnicity, and county of residence of each Twitter user. The codes for estimating Twitter user demographics were also enclosed; the codes were designed for analyzing raw Twitter data with user profile information including username, screen name, profile image, and geo-locations. Twitter users were anonymized to protect their privacy per the data user agreement of Twitter, Inc. Twitter users in the shared data set were anonymized
A collection of global geotagged tweets with COVID-19 related mentions in 2020.
No full textA dataset of over 1.75 million global geotagged tweets that contain COVID-19 related keywords or hashtags, updated weekly from January 15 to December 31, 2020, as well as the summary of totals by national and subnational levels. All individual tweet data are geotagged at national levels, and US tweets are geotagged at subnational levels
Outlier Detection and Comparison of Origin-Destination Flows Using Data Depth
No full textAdvances in location-aware technology have resulted in massive trajectory data. Origin-destination (OD) trajectories provide rich information on urban flow and transport demand. This study describes a new method for detecting OD flows outliers and conducting hypothesis testing between two OD flow datasets in terms of the variations of spatial extent, that is, spread. The proposed method is based on data depth, which measures the centrality and outlyingness of a point with respect to a given dataset in R^d. Based on the center-outward ordering property, the proposed method analyzes the underlying characteristics of OD flows, such as location, outlyingness, and spread. The ability of the method to detect OD anomalies is compared with that of the Mahalanobis distance approach, and an F-test is used to verify the difference in scale. Empirical evaluation has demonstrated that our method effectively identifies OD flows outliers in an interactive way. Furthermore, the method can provide new perspectives such as spatial extent by considering the overall structure of data when comparing two different OD flows in terms of scale
Supplemental Material, sj-pptx-4-gsj-10.1177_21925682211027833 - Effect of Zoledronic Acid on the Vertebral Body Bone Mineral Density After Instrumented Intervertebral Fusion in Postmenopausal Women With Osteoporosis
No full textSupplemental Material, sj-pptx-4-gsj-10.1177_21925682211027833 for Effect of Zoledronic Acid on the Vertebral Body Bone Mineral Density After Instrumented Intervertebral Fusion in Postmenopausal Women With Osteoporosis by Junjun Fan, Tao Liu, Xin Dong, Siguo Sun, Hongtao Zhang, Chunbao Yang, Xin Yin, Bo Liao and Xiaoxiang Li in Global Spine Journal</p
Exploring Chinese Consumers’ Perception and Potential Acceptance of Cell-Cultured Meat and Plant-Based Meat: A Focus Group Study and Content Analysis
No full text(1) Background: In recent years, meat alternatives, including plant-based and animal cell-cultured meat, have attracted substantial interest among Chinese food science researchers and consumers, prompting considerable debate; (2) Methods: This study utilizes qualitative research methods, specifically focus group interviews with 59 participants across five administrative regions and seven cities in China, to explore consumer knowledge, perceptions, and potential acceptance of meat substitutes; (3) Results: The findings reveal that Chinese consumers generally exhibit a low level of understanding of new meat substitutes, particularly animal cell-cultured meat. Although participants acknowledge the potential environmental, resource-saving, and animal welfare benefits associated with meat substitutes, they also express concerns about perceived risks, such as artificial taste, high costs, market monopolization, diminished consumer welfare, and adverse impacts on traditional animal husbandry and employment. Despite a willingness to try meat substitutes, the regular purchase and consumption of these remain limited. The acceptance of meat substitutes is influenced by factors including personal characteristics, price, safety, and the authenticity of taste; (4) Conclusions: The study concludes that legislative support, technological advancements in production and regulation, price reductions, and the establishment of a robust traceability system may enhance consumer confidence and acceptance of meat substitutes in China
Enhancing Inverse Modeling in Groundwater Systems through Machine Learning: A Comprehensive Comparative Study
No full text<p><span>1. Surrogate models</span></p>
<p><span>FCDNN.rar: codes and data for FCDNN surrogate model method</span></p>
<p><span>MSVR.rar: codes and data for surrogate model method</span></p>
<p><span>LeNet.rar: codes and data for LeNet surrogate model method</span></p>
<p><span>ResNet.rar: codes and data for ResNet surrogate model method</span></p>
<p><span>2. Optimization algorithms</span></p>
<p><span>Optimization algorithm comparison.rar: codes and data for optimization algorithm comparison</span></p>
Sinophlaeobida taiwanensis Yin & Yin, 2007, sp. nov.
No full textSinophlaeobida taiwanensis sp. nov. Figs. A–F Type materials Holotype: male, China: Taiwan Pingtung, (22 ° 40 'N, 120 ° 29 'E), alt, 25m (K.S. Lin), 21 March 1980. Paratype: 1 female Pingtung (K.C. Chou & C.N. Lin) 4 August 1982; 1 male, same data as holotype; 1 female Pingtung (K.C. Lin & C.N. Lin) 3 August 1982 (AIT); 1 male, Pingtung Kenting (21 ° 57 'N, 120 ° 47 'E) (K.W. Wang) 23 May 1989; 1 male, Pingtung Manchou (22 °02'N, 120 ° 50 'E) alt, 31m, (K.W. Wang) 17 Jan. 1990; 1 male Pingtung Manchou, (H.T. Chen) 24 May 1998 (NMNH). Descriptions Male (figs. A-C). Body median in size. Head larger and short, shorter than length of pronotum. Face oblique distinctly in profile, with sulcus throughout, contracted distinctly in the median part. Antennae ensiform, widened distinctly in the basal part, toward apices gently narrow, 18 segments, surpassing over the posterior margin of pronotum, length of a middle segment 2.5 times its width. Eyes globose, longitudinal diameter 1.5 times horizontal diameter and 1.6 times subocular furrow. Pronotum cylindrical, median keel normal, low, slightly cut by hind transverse sulcus, lateral carinae parallel nearly, the prozona is 1.5 times of metazona in length, hind margin excised slightly in the middle. The length of interspace of mesosterum equal to the narrowest, lateral lobes of metasternum separated. Tegmina abbreviated, scale, lateral. Upper keel of hind femur serrated slightly, well proportioned, length as long as 4.6 times of maximum width, the end of lower knee lobes rounded. Hind tibia with 12 spines on the inner and 11 spines outer side, external apical spine absent. Second joint of hind tarsus shorter than the first joint. Tympanum organ distinct. Epiproct with longitudinal groove in the middle. Cercus slender, reaching to the tip of epiproct, furculae absent. Subgenital plate short, conical. Female (figs. D-F). Body larger, more robust. Antennae ensiform, 18 segments, shorter, not reaching to the posterior margin of pronotum. Longitudinal diameter of eyes 1.5 times horizontal diameter and equal to subocular furrow. The narrowest of interspace of mesosterum is 1.1 times its length. Length of the hind femur as long as 5.4 times of maximum width. Epiproct triangular, basal half part with longitudinal groove in the middle. Cercus short-conical, about reaching to the 2 / 3 of epiproct. Ovipositor valves short, distinctly hooked in the end, outer margin smooth. Coloration Males Body yellowish-brown. Antennae brown, apical three segments pale. Pronotum brown. Postocular band black, extending to the tegmina. Tegmina darker in anterior 2 / 3 part and yellowish-brown in posterior 1 / 3 part. Hind femur yellowish-brown, knee dark. Hind tibia brown, basal part dark. Abdomen and subgenital plate yellowish-brown. Females The color of body is similar to male. Acknowledgements This study is financially supported by the grants of the National Natural Sciences Foundation of Peoples Republic of China (No. 30630010) and the Chinese Academy of Sciences (No. KSCX 2 -YW-Z). We are grateful to Prof. Yien-Shing Chow, who is the former Director of National Museum of Natural Science, Taichung for his kind invitation to the first author to visit Taiwan. We are also grateful to Mr. K.S. Lin, K.C. Chou, C.N. Lin, K.W. Wang & H.T. Chen for collecting specimens. We thank Dr. Zhiwei Liu (Biological Science Department, Eastern Illinois University, U.S. A) for providing some references. FIGURES A–F Photographs of Sinophlaeobida taiwanensis sp. nov. A Side view of holotype; B Dorsal view of holotype; C Head and pronotum of holotype; D Head and pronotum of paratype; E Dorsal view of paratype; F Side view of paratype.Published as part of Yin, Xiang-Chu & Yin, Hong, 2007, A new genus and new species of Phlaeobinae from China (Orthoptera: Acrididae), pp. 65-68 in Zootaxa 1547 on pages 66-67, DOI: 10.5281/zenodo.27388
Shitifen Sangxian ba shi nian dai yin yue ju de chuan tong yu ji cheng
No full textWong, Hei Yin.Thesis M.Phil. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 154-162).Abstracts also in Chinese.Title from PDF title page (viewed on 05, January, 2017).Wong, Hei Yin
The Calendar of Yin(殷)
No full textProfessor Tung Tso-pin has made an attempt to reconstruct the calendar of Yin. Since his premisses seem to contain some points open to question, each of them should be subjected to close examination. How Professor Tung has determined the first day of each month? The present author's view is this; the new moon and intercalation were put at the end of the year throughout the Yin dynasty. This is, the author believes, proved in the present study which is based on the examination of oracle bone inscriptions. These two devices seem to have been in use until the 6-7 centuries, B.C., from the beginning of the Chou period. In the present article the author introduces a new view on the problem of "sheng-pa" and "ssu-pa"; they represent the halves of the synodic month which is found to have been in use in ancient India. In short, the Yin had a still incomplete calendar, and the view of Professor Tung that they already used an institutionalized calendar is untenable
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