1,721,144 research outputs found
Interview with Mostafa Mahmoud
No full textفي هذه المقابلة، يتحدث الدكتور والفيلسوف والمفكر المصري مصطفي محمود عن أهمية الحوار مع الشباب الذي يعيش في عصر العلم.In this interview, Mostafa Mahmoud, an Egyptian renowned doctor, philosopher, and thinker, discusses connecting with young people living in the era of science
Interview with Mostafa Mahmoud
No full textفي هذه المقابلة، يتحدث مصطفى محمود، الكاتب والمفكر الإسلامي المصري، عن أهم القضايا المطروحة في مؤتمر "الاسلام والقرن الحادي والعشرين" المنعقد في القاهرة تحت تنظيم المجلس الأعلى للشئون الاسلامية عام 1998. أجرت المقابلة إيمان رافع.In this interview, Mostafa Mahmoud, an Egyptian Islamic writer, speaks about main issues put forward in the "Islam and the 21st Century" conference held in Cairo. The interview was conducted by Iman Rafi
Interview with Mostafa Mahmoud
No full textفي هذه المقابلة، يتحدث الدكتور مصطفى محمود عن عتذار الفاتيكان عن الحروب الصليبية ومحاكم التفتيش ودعوته لإنهاء الصراع العربي الإسرائيلي وفلسفة الاعتذار التاريخية. أجرت الحوار إيمان رافع.In this interview, Dr. Mustafa Mahmoud addresses the Vatican's apology for the crusades and the inquisition, his call to end the Arab-Israeli conflict, and the historical philosophy of apology. The interview was conducted by Iman Rafi
Capturing CO2 from the atmosphere: Design and analysis of a large-scale DAC facility
Full text linkDirect air carbon capture (DAC) technologies can substantially lower the CO2 concentrations in the atmosphere by enabling negative emissions. This study shows in detail the design of the DAC plant at industrial scale and provides insights on its performance in terms of process economic and CO2 emissions count. The proposed DAC plant is optimized to capture CO2 directly from the atmospheric air, employing a sensitivity analysis to find the influence of operation and design parameters on the total cost. Absorption using sodium hydroxide as chemisorbent is utilized with a capture rate of 0.7. Industrially mature common process units are considered to achieve a design that is relevant in the near future. An initial base case design indicates a carbon cost of 244 /ton-CO2, with two additional heat exchangers added to the network. Furthermore, renewable scenario is considered where a parallel electrolysis stage feeds the process hydrogen fuel and oxygen required for combustion in the calciner. This scenario indicates that higher operating costs are incurred due to the expensive green fuel. Finally, a profitability analysis is performed to establish the feasibility for further processing to methanol in a Power-to-X facility. The estimations indicate that the hydrogen price has to go down by 46.3% in order to break-even
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
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
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