2,334 research outputs found
Advances in clean energy technologies
No full textAzad, M ORCiD: 0000-0001-8258-6057Advances in Clean Energy Technologies presents the latest advanced approaches toward a cleaner and more sustainable energy environment. Editor Kalam Azad and his team of expert contributors focus on recent developments in the field of clean energy technologies, sustainable zero emission resources, energy efficiency and environmental sustainability, as well as clean energy policy and markets. This well-rounded reference includes an authoritative view on control and storage solutions specific to medium and large-scale industries, advanced approaches to modeling, and experimental investigations on clean energy technologies.
Those working in and researching clean energy and sustainability will obtain detailed understanding of a variety of zero emission energy production and conversion approaches, as well as important socio-economic and environmental considerations that can be applied to their own unique power generation settings.
Key Features
Presents an exclusive analysis on advanced approaches of modeling and experimental investigations of clean energy technologies, including solar, wind, ocean, and hybrid systems
Includes an authoritative and cross-disciplinary view on energy policy and energy markets
Helps readers develop an understanding of concepts and solutions to global issues surrounding sustainability in medium-large scale energy industries
Offers detailed understanding of a variety of zero emission energy production and conversion approache
Study on wind energy potential by eight numerical methods of Weibull distribution
No full textRasul, M ORCiD: 0000-0001-8159-1321In this study, eight different numerical methods have been investigated to identify more effective methods for efficiently determining the value of Weibull factors (k and c) to estimate wind energy potential. To achieve the goal, the study used nine statistical test tools including relative percentage of error, root mean square error, mean percentage of error, mean absolute percentage of error, chi-square error, and analysis of variance to precisely rank the methods. The method of moment, least square method, and empirical method were found to be better methods for calculating Weibull factors in this specific application. The statistical fittings of the measured and calculated wind speed data by Weibull functions are assessed and results are graphically represented to provide better understanding. The monthly variations of available power, energy density, energy intensity, etc. have been analyzed for the selected wind sites. This analysis used 10-min time series wind speed data obtained by the United Nations Development Programme (UNDP) wind project at four wind monitoring stations in Bangladesh. Further study is needed for long-term wind data analysis for a prospective windy site and a suitable design of wind turbine for that site. © 2017 Elsevier Inc. All rights reserved
Türkiye çocuk edebiyatında iki önemli isim: Sevim Ak, Behiç Ak
No full textAnkara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2018.This work is a student project of the Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.The History of Turkey course (HIST200) is a requirement for all Bilkent undergraduates. It is designed to encourage students to work in groups on projects concerning any topic of their choice that relates to the history of Turkey. It is designed as an interactive course with an emphasis on research and the objective of investigating events, chronologically short historical periods, as well as historic representations. Students from all departments prepare and present final projects for examination by a committee, with 10 projects chosen to receive awards.Includes bibliographical references (page 15).Bu makalenin amacı, çocuk öyküleri yazarı Sevim Ak ve Behiç Ak ile ilgili detaylı bilgiler vererek Türkiye edebiyatındaki yerlerinin önemini göstermektir. Bu makale, Sevim Ak’ın yazarlık kariyeri ve kardeşi Behiç Ak’ın sanatçı kişiliği ve Sevim Ak ile işbirlikleri hakkında bilgi veriyor. Makalemiz, Sevim Ak’ın hayat hikayesini anlatırken çocukluğundan itibaren bir yazar olarak gelişimini inceliyor, yurtiçinde ve yurtdışında elde ettiği başarılardan bahsediyor ve yazarlık dışı aktivitelerine de değiniyor. Behiç Ak ‘ın da karikatüristlik kariyerinden ve Sevim Ak ile işbirliğinden bahsediyor. Bu çalışma yapılırken ikinci el kaynakların yanı sıra Sevim Ak ile yapılan röportaj da kullanılmıştır.This article aims to demonstrate the achievements of the Turkish author, Sevim Ak and her brother Behiç Ak in Turkish literature. This article gives information about both Sevim Ak’ s and Behiç Ak’s career and Behiç Ak’s contribution to Sevim Ak’s works with his cartoons. Our project studies Sevim Ak and her brother’s childhood, Her career path, achievements in Turkey and overseas, and finally other projects she participated in. In addition, Behiç Ak’s career as a cartoonist is mentioned. Secondary sources and an interview with Sevim Ak as a primary source is used in this project.by Abdürrahim Özer
Biodiesel from Queensland bush nut (Macadamia integrifolia)
No full textRasul, M ORCiD: 0000-0001-8159-1321Macadamia, an oil-enriched Queensland bush nut, is one of the Australian native species. In this study, crude vegetable oil was extracted from Macadamia nuts by the n-hexane (98%) method and converted to biodiesel by a transesterification reaction. The reaction utilized potassium methoxide as a catalyst with a reaction temperature of 60°C for 60 min. The physiochemical fuel properties of the crude vegetable oil and converted biodiesel were tested under the ASTM and EN standards and compared with ultra-low sulfur diesel (ULSD). The fatty acid methyl esters (FAMEs) were analyzed by gas chromatography (GC) using the AOCS Ce 1a-13 standard method. The physical behavior of the biodiesel at different temperatures was analyzed and compared with ULSD. The mass and energy balances were studied for both the oil extraction and biodiesel conversion processes to calculate the total process loss of the conversion system. The study found about 73% oil yield for macadamia nut by n-hexane extraction and a 98.21% conversion efficiency utilizing the designated reaction. The GC test identified 21 FAMEs in the biodiesel that contains mainly 15.39%vol. palmitoleic acid (C16:1) and 61.09%vol. oleic acid (C18:0). Other fuel properties, such as calorific value (39.88 MJ/kg), flash point (137°C), and cetane number (56.9) were measured and compared with ULSD values. In the biodiesel conversion process, 58.71% of total mass was recovered as a final product (biodiesel) and 12.51% as by-product (glycerin), respectively, which means that 84% energy was recovered by biodiesel and 10% by glycerin with a 6% energy loss during the conversion process. © 2017 Elsevier Inc. All rights reserved
Weibull’s analysis of wind power potential at coastal sites in Kuakata, Bangladesh
No full textA statistical analysis of ten minutes interval wind data at 20 m height for different location of Bangladesh has been made. The data has been shorted in sequence of appropriate frequency as hourly, daily and monthly mean wind speed. The data has been presented and analyzed
in velocity friquency bar graph, energy bar graph, velocity duration curve etc. Two important paramets Weibull shape factor “k” and Weibull scale factor “c” have been obtained from the data by three methods. Weibull function F(v), Weibull probability density function f(v) and available energy in the wind (wh/m2) have also been obtained from the wind data.A. K. Azad and Manabendra Sah
The Localization of Ak and Kok Horde
Get PDFThe author addresses the issue of the correlation of the names Ak and Kok Horde with the western and eastern wings of Ulus Dzhuchi. The paper provides a historiography of the issue over the last 20 years. In addition, the work of 20th century scientists is also used. The main information about the Ak and Kok Horde in the sources is analysed. The author's interpretation of the significance of the dedicatory inscription in the Khosrow and Shirin poem is provided. The issue of the relationship between the terms Ak Horde and Golden Horde is addressed. As a result, the author concludes that in the works of G.A. Fedorov-Davydov and V.V. Trepavlov the errors of medieval sources were overcome, and the localization of the Ak and Kok Horde and the secondary division of the ulus into wings were suggested with substantiation. The available sources suggest that the Russian chronicles and a number of Oriental authors create a unified picture in understanding this issue, while the use of the Chingiz-nama does not correlate with earlier sources. On the basis of a detailed study of Tinibek's history, it is concluded that he was not the ruler of Sygnak and, therefore, his kingdom was the western ulus with its centre in Saray. This use of the term Ak Horde in the poem does not contradict the accepted version of Ak and Kok Horde’s localisation. As for the issue of the relationship between the terms ‘Golden’ and ‘White’ Horde, a number of modern studies allow for the identification of these concepts
Geographical location of sample collection site (Orakzai Agency: black area) in FATA, Pakistan.
No full text<p>FATA (gray): Federally Administered Tribal Areas, KPK: Khyber Pakhtunkhwa, AK: Azad Kashmir.</p
Clean energy for sustainable development: comparisons and contrasts of new approaches
No full textRasul, M ORCiD: 0000-0001-8159-1321Since the past decades, the energy sector is facing a number of challenges; however, the fundamental challenge is meeting the growing energy demand in sustainable, environment-friendly, efficient, and cleaner ways. Clean Energy for Sustainable Development: Comparisons and Contrasts of New Approaches updates the industry and academia with recent developments in this field. The book primarily focuses on developments in the fields of energy technology, clean, low emission, and sustainable energy, energy efficiency, and energy and environmental sustainability to academics, researchers, practicing engineers, technologists, and students
Dynamics of Network Formation Processes in the Co-Author Model
Get PDFThis article studies the dynamics in the formation processes of a mutual consent network in game theory setting: the Co-Author Model. In this article, a limited observation is applied and analytical results are derived. Then, 2 parameters are varied: the number of individuals in the network and the initial probability of the links in the network in its initial state. A simulation result shows a finding that is consistent with an analytical result for a state of equilibrium while it also shows different possible equilibria.Dynamics, Network, Game Theory, Model,Simulation, Equilibrium, Complexity
Ak y la humanidad: Una obra bajo sospecha
Get PDFA principios de septiembre de 1938, a los nueve días de su estreno en el Español y en plena Guerra Civil, la obra teatral Ak y la Humanidad, original de la escritora Halma Angélico, y adaptación del cuento del mismo título del autor ruso Jefim Sosulia, fue suspendida por orden gubernativa tras una tensa polémica desatada en la prensa anarquista contra la obra y su autora.
At the beginning of September 1938, nine days after its premiere at the Teatro Español and in the middle of the Spanish Civil War, the theatre performance Ak and Mankind, written originally by Halma Angélico, and adapted from the tale with the same title by the Russian author Jefim Sosulia, was cancelled by government act after conflict arisen in the Anarchist press against the author and her work
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