1,721,089 research outputs found
Integration of Renewable Energy Resources into the Turkish Electricity System
No full textYenilenebilir Enerji Kaynaklarının Türkiye Elektrik Sistemine Entegrasyonu
Dr. Mehmet BULUT
In Book: MÜHENDİSLİK ALANINDA AKADEMİK ARAŞTIRMA ve DERLEMELER
Chapter #5
Türkiye’nin birincil enerji tüketiminin en büyük payı yüzde 70 ile ithal petrol ve doğalgaza bağımlı bulunmaktadır. Bu dışa bağımlılıktan kurtulmak için yenilenebilir enerji kaynaklarına yönelik eğilim giderek artmaktadır. 2020 yılı sonu itibarıyla Türkiye’nin toplam kurulu gücü yaklaşık 96.270 MW değerine ulaşmıştır. Bu kapasitenin %27’si doğalgaz santralleri, %32’si hidroelektrik santralleri ve %9.3’ü ithal kömür santralları olmak üzere %21 linyit santrallerinden oluşmaktadır. Baraj tipi hidrolik dahil olmak üzere rüzgar, güneş, jeotermal ve biyokütle enerjine dayalı yenilenebilir enerji kaynaklarının kurulu güç kapasiteleri toplamda 49.577 MW olup bu oran toplam kurulu gücün %51,5’una denk gelmektedir. Bu durumda yenilenebilir enerji kaynaklarının payı toplam toplam kurulu gücün yarısından fazlasını oluşturmaktadır. Üretimde ise 2020 yılı geçici rakamlarına göre 129,5 milyar kWh elektrik enerjisi yenilenebilir enerji kaynaklarından elde edilmiş olup bu değer toplam 305,4 milyar kWh brüt üretimin yaklaşık %42,4’üne denk gelmektedir.
Türkiye’nin elektrik talep projeksiyonlarına göre, talebi karşılamak için 2030 yılına kadar mevcut kurulu güce ek olarak yaklaşık 37.000 MW güç kapasitesine ihtiyaç vardır. Bu miktar mevcut kapasitenin %40’ına karşılık gelmektedir. Dolayısıyla güneş ve rüzgar enerjisinden beklenen gücün elde edilmesi hem yerli kaynakların değerlendirilmesine hem de emisyonların azaltılmasına büyük katkı sağlayacaktır.
Bu çalışmada, özellikle hidroelektrik, güneş, rüzgar v.b yenilenebilir enerji kaynaklarının gelişimi incelenerek, Türkiye’nin elektrik şebekesine bağlanacak yenilenebilir enerji kaynaklarının entegrasyonuna ilişkin bir analiz yapılmıştır. Yenilenebilir elektrik üretim teknolojilerinin kurulu kapasitesindeki artış, özellikle rüzgar ve güneş enerjisinin artan payı Türkiye’nin elektrik sistemindeki durumu incelenmiştir. Önümüzdeki yıllarda Türkiye’nin elektrik kurulu gücünün ne kadarının yenilenebilir enerji kaynaklarından karşılanabileceği sorusuna cevap bulmak için bir analiz çalışması yapılmıştır.Citation/Alıntı :
Bulut M., (2021), Yenilenebilir Enerji Kaynaklarının Türkiye Elektrik Sistemine Entegrasyonu, Mühendislik Alanında Akademik Araştırma ve Derlemeler, Editör: Prof. Dr. Servet Soygüder, Sayfa: 71-91, Mayıs 2021, Duvar Yayınları, İzmir, Türkiye. ISBN: 978-625-7680-60-
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
Finite Element Analysis of Micro Beam in a MEMS-Based Microfluidic Channel
No full textAbstract
It is well known that the physical properties of a micro beam are largely dependent on the fluid and micro channels in which the bam is immersed. In this study, the finite element analysis of the micro beam within the microfluidic channel based on MEMS (Micro-Electro-Mechanical Systems) is aimed to be made in detail. These analyzes include von Mises stress, pressure quantities, velocities, and displacements during movement. Using the Euler-Bernoulli equation for the beam, a micro-beam fixed in a fluid is modeled and analyzed. Unstable Stokes equations are solved using a Helmholtz decomposition technique in a two-dimensional plane containing micro-beam sections. The finite element method using the Comsol Multiphysics software results is compared with the current validation method, and an acceptable match is obtained between them. Pressure, velocity, and displacement analyzes were created by ensuring all boundary conditions. The current formulation has been shown to be a suitable and novel approach to solve the problem with good accuracy. As a result, a theoretical model is provided that can be used in the design and interpretation of density, viscosity, and microfluidic sensors.
Keywords: Micro Beam, Microfluidic, MEMS, Comsol.Ertugrul, I. (2020). Finite Element Analysis of Beam in a MEMS-Based Microfluidic Channel, Journal of Scientific Technology and Engineering Research, 1(2):40-45. Doi: 10.5281/zenodo.428926
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
The Role of Cash-Waqf in Societal Responsibility
No full textdama Dembele (Istanbul Sabahattin Zaim University, Turkey), Buerhan Saiti (Istanbul Sabahattin Zaim University, Turkey) and Mehmet Bulut (Istanbul Sabahattin Zaim University, Turkey)The widespread poverty in the world has required multi-dimensional approaches
and efforts to alleviate it and improve the life of the society at both national and
global levels. As a result, many agencies, governmental bodies, and non-government
organizations (NGOs) were formulated and established for this purpose with their
own special objectives, scopes, visions, and missions. Different entities and agencies
have taken various approaches and methods in the process of poverty eradication
and are undertaking several programs in a large number of communities at the global
scale. Meanwhile, the globalizations of poverty mitigation efforts and increasing
number of agencies, operating in different communities, have increased the quick
prevarication of different beliefs in the same community. One of the reasons for
this is that each organization or agency has its own purposes, motives, values, and
norms to directly or indirectly achieve by helping the people in need
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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