1,721,337 research outputs found
ANALISIS AERODINAMIKA PADA PROFIL NACA 23112 DENGAN MENGGUNAKAN SOLIDWORK
Get PDFAnalisis karakteristik aerodinamika ini dilakukan pada airfoil NACA 23112 yang digunakan pada sayap pesawat dan turbin angin. Penelitian ini bertujuan Mendapatkan nilai coefficient of drag (Cd) dan coefficient of lift (Cl) pada profile NACA 23112 serta hubungan yang terjadi antara kedua koefisien terhadap sudut serang (α) yang bervariasi antata 00 sampai 3600. Dalam penelitian ini, analisa karakteristik aerodinamika dilakukan dengan mengkaji sudut serang (α) antara (0° - 360°) terhadap kontur tekanan dan kecepatan, serta hasil data analisis koefisien angkat (Cl) dan koefisien hambat (Cd) yang terjadi disekitar airfoil. Analisis dilakukan dengan cara mensimulasikan aliran fluida yang mengalir pada airfoil NACA 23112 dengan menggunakan software solidworks 2018 dengan menganalisis pada berbagai sudut serang (00 sampai 3600) selisih 50 disetiap sudut serangnya. Metode yang digunakan adalah metode analisis simulasi. Simulasi dilakukan dengan membuat model airfoil NACA 23112 dengan kecepatan 5 m/s, sehingga didapatkan antara sudut serang terhadap kecepatan, tekanan, koefisien angkat (Cl) dan koefisien hambat (Cd) yang dihasilkan. Hasil penelitian ini menunjukkan bahwa nilai Cd da Cl yang didapat juga bervariasi. Koefisien drag mencapai pada puncaknya saat sudut serang mendekati 900 dan 2700. Dan pada sudut serang mendekati 450, 1350, 2230 dan 3150 koefisien berada pada nilai maksimumnya.
Kata Kunci : Aerodinamika, Airfoil NACA 23112, Drag, Lift, Solidwork 2018,
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Analysis of these aerodynamic characteristics was performed on NACA 23112
airfoils used on aircraft wings and wind turbines. This study aims to obtain the
value of coefficient of drag (Cd) and coefficient of lift (Cl) in NACA profile 23112
and the relationship that occurs between the two coefficients of attack angle (α)
which varies from 00
to 3600
. In this study, aerodynamic characteristic analysis was
carried out by examining the angle of attack (α) between (0 ° - 360 °) on the contour
of pressure and speed, as well as the results of data analysis of the lift coefficient
(Cl) and drag coefficient (Cd) that occur around the airfoil. The analysis was
carried out by simulating the flow of fluid flowing in the NACA 23112 airfoil using
solidworks 2018 software by analyzing at various angles of attack (00
to 3600
) a
difference of 50 at each angle of attack. The method used is a simulation analysis
method. The simulation was carried out by making a NACA 23112 airfoil model
with a speed of 5 m / s, so that the angle of attack was obtained between the speed,
pressure, lift coefficient (Cl) and drag coefficient (Cd) produce. The results of this
study showed that the value of Cd da Cl obtained also varied. The drag coefficient
reaches its peak when the angle of attack approaches 900 and 2700
. And at angles
of attack close to 450
, 1350
, 2230 and 3150
the coefficients are at their maximum
values.
Keywords : Aerodynamics, Airfoil NACA 23112, Drag, Lift, Solidwork 201
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
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
Unifying Formal Methods for Trustworthy Distributed Systems (Dagstuhl Seminar 23112)
No full textThis report documents the program and the outcomes of Dagstuhl Seminar 23112 "Unifying Formal Methods for Trustworthy Distributed Systems".
Distributed systems are challenging to develop and reason about. Unsurprisingly, there have been many efforts in formally specifying, modeling, and verifying distributed systems. A bird’s eye view of this vast body of work reveals two primary sensibilities. The first is that of semi-automated or interactive deductive verification targeting structured programs and implementations, and focusing on simplifying the user’s task of providing inductive invariants. The second is that of fully-automated model checking, targeting more abstract models of distributed systems, and focusing on extending the boundaries of decidability for the parameterized model checking problem. Regrettably, solution frameworks and results in deductive verification and parameterized model checking have largely evolved in isolation while targeting the same overall goal.
This seminar aimed at enabling conversations and solutions cutting across the deductive verification and model checking communities, leveraging the complementary strengths of these approaches. In particular, we explored layered and compositional approaches for modeling and verification of industrial-scale distributed systems that lend themselves well to separation of verification tasks, and thereby the use of diverse proof methodologies
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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