1,721,316 research outputs found
CCDC 1551848: Experimental Crystal Structure Determination
No full textRelated Article: Richard Layfield, Fu-Sheng Guo, Benjamin Day, Yan-Cong Chen, Ming-Liang Tong, Akseli Mansikamäkki|2017|Angew.Chem.,Int.Ed.|56|11445|doi:10.1002/anie.20170542
CCDC 1551846: Experimental Crystal Structure Determination
No full textRelated Article: Richard Layfield, Fu-Sheng Guo, Benjamin Day, Yan-Cong Chen, Ming-Liang Tong, Akseli Mansikamäkki|2017|Angew.Chem.,Int.Ed.|56|11445|doi:10.1002/anie.20170542
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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
A Study on the variable freeway speed-limit control strategy
No full text高速公路主線上，不均質的車流往往造成車流造成壅塞或是壅塞擴大的主要原因。當流量接近公路容量時，車隊中的一些小擾動，就會影響到車流的平順運行，而造成衝擊波的效應，如此便使得後方車流的運行受到干擾，而造成車流壅塞之形成與擴大。因此如果採用適當的速率控制策略來建議駕駛者，使駕駛者趨向以適當的速度行駛，如此即可減少不穩定的情形發生和舒緩衝擊波效應，以達到順暢的交通流。因此，必須去發展一個動態最佳化速限控制模式，能夠使行車效率最大化。
本研究提出一個以巨觀車流模式和連續車流理論為基礎之模式，能在瓶頸路段所造成之壅塞狀況下找出最佳化之動態速限漸變控制模式。主要目標為控制範圍總通過量最大化。此數學模式有五個參數需要以實際資料校估：(1)自由流速，(2)壅塞密度，(3)速度和密度關係之時間推移參數，(4)衝擊波關係之時間推移參數，(5)瓶頸路段下游之邊界流量。
本研究將以國道五號為研究對象，先利用現實資料建立一個國道五號北上路段之模擬路段，為了可重現壅塞情況，本研究先了解並分析其瓶頸路段之道路特性，發現壅塞細部原因為雪山隧道內之禁止變換車道，速限改變及安全間距參數增加，修改上述道路特性後模擬路網即可呈現其壅塞情況，本研究再根據此模擬路段找出模式之校估參數，並確認其控制所需元件，其包括了偵測器和速限可變標誌擺設位置、速限數值的設定模式，控制範圍的選取。
將本研究之模擬路段放入速限漸變控制後，其總通過量增加了19.5%，平均旅行時間減少了8.44%等，顯示此模式的確可以增進在國道五號路網時的績效，隨著流量之增加，雖然績效改善空間減少，但仍有效果存在，顯示本研究之模式對於實際路網應用有其成效。In the main stream of freeway, the non-homogenous traffic flow is the main reason of congestion or congestion expansion. When the flow is closed to the road capacity, the small disturbance in the platoon will affect the traffic flow smooth run, and cause the shock wave, and then it influences the downstream traffic. Finally it results in the expansion of the congestion. Therefore, if there is the properly speed limit control tragedy to recommend the drivers to drive in the appropriate speed, in order to let the traffic flow reduce the occurrence of instability situation and ease the shock effect in order to achieve smooth traffic flow. Thus, it is essential to develop a dynamic optimal speed-limit control model which can maximize the traffic efficiency.
Based on this, this study proposes a macroscopic traffic models and continuity model-based model for dynamic variable speed-limit control under the congestion conditions caused by the bottleneck. The objective is maximizing the total throughput in the control boundary, and there are five parameters in the mathematical model which need to be calibrated by using field data: (1) the free velocity, (2) the jam density, (3) the parameter of the relationship between density and speed over time, (4) the parameter of the shock wave over time, (5) the downstream boundary flow of bottleneck.
The freeway No.5 is the research object of this study. Firstly, the study uses the field data to establish the simulation of the northern section of Freeway No.5, in order to reproduce the congestion, for this, this study analyzes the characteristics of bottleneck section of the road, and finds the detail reason of the Hsuehshan Tunnel congestion is the exhibition of land changing, speed limit changes and increase of the safety headway parameters. And this study find out the model calibrated parameters , the car-following factor which is needed by the simulation and the component of the control, which includes the speed limit sign and detector location, and the speed limit value, control boundary selection.
This study put the variable speed limit control into the simulation network, and the total throughput increased by 19.5%, average travel time decreased by 8.44%, etc. It shows that this model can indeed improve the performance of the network in the Freeway No.5. With the increasing of the flow, although the performance improvement is reduced, but it still has the effect on the main stream. The result indicates that the model of this paper is effective on the simulation network
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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