1,721,061 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Identification and mitigation of bottlenecks in complex production system
No full textThesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering.A production system is a system where the raw materials are converted to finished products. A production system is classified in to two types based on the products processed namely single product production system and multi-product production system. The products in any production system would be in either value added or non-value added state. This research focuses on reducing the non-value added state in multi-product or complex production system by analyzing the bottlenecks. A bottleneck machine causes blocking or starving of parts in the system thereby increasing the non-value added time and reducing the system performance. Bottlenecks can be mitigated by control strategies such as buffer allocation and capacity addition. In order to mitigate the bottlenecks, the location, source and type of bottleneck in any system has to be identified. This research uses multiple metrics in order to identify the bottleneck and its type. Based on the metric values, the control strategies are implemented by the developed heuristics such as buffer allocation based on qualitative characteristics, capacity addition based on highest utilization and economic analysis based on sensitivity analysis. Multiple options are given with respect to their performance improvement for the management or the customer to select in order to give flexibility in terms of investment, demand and layout space
Analyzing the impact of energy storage system on distribution system
Get PDFThesis (M.S.)-- Wichita State University, College of Engineering, Dept. of Industrial, Systems, and Manufacturing EngineeringModern lifestyle has increased the electrical energy demand. with the increase of power demand, the attention on the renewable resource has also increased due to their environmental and economical; benefits. the renewable resources, on the other hand, are dispatchable generation units meaning that are not controllable in case of producing power, we have sun radiation during the day but not at nights thus, the using the renewable resource might affect the reliability directly. with the increase in demand and technology power system is expected have high reliability.
battery energy storage is being used in microgrid and distribution power system to shave the peak load of the system and enhance the reliability of the system. In this thesis, the focus is optimizing the allocation of ESS in MG with the renewable resources penetratio
Design of multi-echelon supply chain systems to optimize cost and service levels
No full textThesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial, Systems and Manufacturing EngineeringPrimarily found basic uncertainties in the supply chain design are supply and demand, later there are many more uncertainties added in the literature of the field, e.g., control. For an organization there are many options available to implement in the area of supply chain design and uncertainty, whether to find the root cause of the uncertainty, or to reduce the risk, or to optimize the process to handle the uncertainty more conveniently, etc. From all these alternatives, this thesis is concentrated on the reduction of uncertainties by answering with the available resources. Therefore, the focus is on optimization of cost and service levels with proper utilization of the network echelons. There is a mathematical model presented in the paper, which is a mixed integer linear programming (MILP). Along with the cost reduction and service level maximization, this research is also directed towards variability reduction by aggregating the customer zones to reduce the volatility in service levels, and in turn higher service levels. The research has future scope to be explored and identified to add dynamic factors
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