1,720,952 research outputs found
Identifying Spreading Sources and Influential Nodes of Hot Events on Social Networks
No full textThe rapid development of World Wide Web accelerates information spreading in various ways. Thanks to the emergence of multiple social platforms, some events which are not much attractive in the past can become social hot spots nowadays. In this paper, we study the information diffusion process of “IP MAN3 box office fraud”, which is widely diffused in the largest Chinese microblogging system, namely Sina Weibo, in March 2016. Based on the temporal metric we have proposed, we succeed in finding out the sources of the information, and constructing the panorama of the diffusion process. In addition, a portion of nodes that promote the diffusion are identified by using the node importance algorithms. Finally, the users with abnormal behaviors in the process of event development are identified.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Multimedia Computin
Assessment on China's urbanization after the implementation of main functional areas planning
No full textChina has implemented main functional areas planning (MFAP) since 2010, which is essential for improving the efficiency of land space utilization and achieving sustainable urban development. Quantitative assessments of the urban development levels (UDLs) at the county level across China after the implementation of MFAP have not been well-documented. In this study, a unified indicator system was developed, and the UDLs of 2850 counties in China after MFAP implementation were evaluated. The results showed that MFAP played a positive role in urban development in China. The UDLs in China generally increased but showed obvious spatial differences. The higher UDLs were mostly found in the counties in the five urban belts, which reflects the overall urban layout of China. The UDLs were generally low in the western counties in comparison with those in the eastern part of China. The differences in the UDLs from east to west were greater than those from north to south. Moreover, the differences in the UDLs presented a spatial agglomeration effect. This study could offer insight into the refinement of MFAP in China and sustainable urban development in developing countries.Accepted Author ManuscriptHydraulic Structures and Flood Ris
Experimental and modeling study on the transient flow and time-dependent yield stress of superfine-tailings cemented paste backfill
No full textThe fresh superfine-tailings cemented paste backfill (SCPB) exhibits strong thixotropy, but quantification of the resulting transient flow (non-steady state) and time-dependent yield stress is lacking. In this study, a simple qualitative model was developed to describe the transient flow and time-dependent yield stress of SCPB. The effect of pre-shear time on the rheological behavior of SCPB was investigated. In addition, the adaptability of conventional non-Newtonian rheological models to SCPB was also evaluated. The results showed the Herschel-Bulkley model provides the most stable dynamic yield stress estimation of SCPB compared to the Bingham and modified Bingham models. A longer pre-shear time (within 500 s) led to smaller initial static yield stress and delayed recovery kinetics of static yield stress, but hardly affected the steady state of SCPB and the time required to reach it. The proposed model provides a good quantification of the transient flow at a given shear rate and time-dependent yield stress of SCPB.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Rivers, Ports, Waterways and Dredging Engineerin
An extracellular steric seeding mechanism for Eph-ephrin signaling platform assembly
Full text linkErythropoetin-producing hepatoma (Eph) receptors are cell-surface protein tyrosine kinases mediating cell-cell communication. Upon activation, they form signaling clusters. We report crystal structures of the full ectodomain of human EphA2 (eEphA2) both alone and in complex with the receptor-binding domain of the ligand ephrinA5 (ephrinA5 RBD). Unliganded eEphA2 forms linear arrays of staggered parallel receptors involving two patches of residues conserved across A-class Ephs. eEphA2-ephrinA5 RBD forms a more elaborate assembly, whose interfaces include the same conserved regions on eEphA2, but rearranged to accommodate ephrinA5 RBD. Cell-surface expression of mutant EphA2s showed that these interfaces are critical for localization at cell-cell contacts and activation-dependent degradation. Our results suggest a 'nucleation' mechanism whereby a limited number of ligand-receptor interactions 'seed' an arrangement of receptors which can propagate into extended signaling arrays
藝術感通理論在自我音樂創作中的運用
No full text[[abstract]]本篇論文係以藝術感通理論為研究重點，透過聲像的轉化，將音樂與繪畫、中國唐詩、民族舞蹈的感通性，實際運用於音樂創作作品中。
藝術感通理論主要的內容論及：
(一) 音樂與繪畫的感通性：音樂中的繪畫性、繪畫中的音樂性。
(二) 詩與音樂的感通性：詩中的音樂性、音樂中的詩性。
(三) 詩、畫、音樂與其他藝術的感通：各藝術領域中的音樂性。
音樂創作中的潛在藝術感通性主要是藉由美學、情感、形式來達到，因藝術感通是值於對藝術的共感覺及藝術移情，並透過想像及象徵之層次將各藝術與音樂之間做一轉化，如此使得不同的藝術品之間得以感通。據此，潛在感通因素在音樂創作中則有其不同的表現方式，以下即分列說明：
(一)美學：創造過程、媒材與表現、欣賞與批評。
(二)情感：藝術符號、表像。
(三)形式：虛幻空間、時間意象。
經由以上的藝術感通理論為基礎，結合「繪畫」、「詩」、「舞蹈」等多樣藝術的共感覺，將其聲像化，並從多位藝術家作品中的創作設計做探討，最後將研究之結果運用於以下的創作作品：
(一)豎笛與弦樂四重奏─《 構成VII 》
(二)四重奏─《 印象•日出 》
(三)聲樂作品─《 樂游原 》、《 涼州詞 》
(四)兩位舞者、雙馬林巴琴與鼓─《 巴里島之舞 》
(五)長笛與兩位打擊樂者─《 虛與實 》
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
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