1,497 research outputs found
Simpson-type inequalities for higher order differentiable functions and applications
No full textİntegral eşitsizlikleri hem teorik hem de uygulamalı matematikte kullanılan en önemli araçlardan biridir. Bazı problemlerde integralin tam değeri hesaplanamaz. Böyle durumlarda yaklaşım metotları geliştirmek gereklidir. Bu yüzden, bazı matematikçiler fonksiyonların çeşitli sınıfları için integral eşitsizlikleri üzerine çalışmıştır. Hermite-Hadamard, Simpson, Ostrowski, Chebyshev, Grüss ve Ostrowski-Grüss eşitsizlikleri, literetürdeki önemli eşitsizliklerden bazılarıdır. Örneğin, Simpson tipi integral eşitsizlikleri, matematiksel analizde ve sayısal entegrasyon yöntemlerindeki kesinlik ve güvenilirlik sorunlarının çözümünde kritik bir rol oynamaktadır. Thomas Simpson tarafından ortaya konulan Simpson Kuralları, nümerik integrasyonda kullanılan önemli yaklaşım metotlarındandır. Bunların ilki Simpson 1/3 formulü olarak bilinen iki çekirdekli modeldir. Aynı zamanda Simpson'ın ikinci formula ya da Newton formulü olarak bilinen Simpson 3/8 kuralı ise Thomas Simpson tarafından ortaya konulan başka bir yaklaşım metodudur. Bu yaklaşım metotları bir integralin yaklaşık değerini vermektedir. Yaklaşım metotları ve integraller arasındaki farkın sınırlarını belirlemek için kullanılan yöntemlerden biri ise integral eşitsizlikleridir. Bu doğrultuda, Simpson kurallarını taban alarak üretilen integral eşitsizliklerine Simpson tipli eşitsizlikler denir. Son zamanlarda, bir çok araştırmacı Simpson eşitsiliği ile ilgili çok sayıda sonuç bulmuşlardır. Bu kapsamda klasik Simpson eşitsizliğinin daha hassas sonuçları, eşdeğerleri ve genelleştirilmiş versiyonlarının yanı sıra fonksiyonların farklı kabulleri altında yeni Simpson tipli eşitsizlikler incelenmiştir. Bu tez kapsamında, konveks fonksiyonları taban alan Simpson tipli eşitsizlikler üzerine devam eden çalışmaların ışığında,yüksek mertebeden türevlenebilir fonksiyonlar için Simpson tipli eşitsizlikler incelenecektir. İlk olarak ikili çekirdek yardımıyla yüksek mertebeden türevlenebilir fonksiyonlar içeren bir integral özdeşliği kurulacaktır. Daha sonra, bu özdeşlik ve konveks fonksiyon özellikleri kullanılarak Simpson tipli integral eşitsizlikleri bulunacaktır. Ek olarak, bu eşitsizlikleri ararken ortaya çıkan sonuçlar yardımıyla nümerik integrasyonda kullanılabilecek yeni Simpson tipli yaklaşım metotları geliştirilecektir. Ayrıca, ortaya çıkan Simpson tipli sonuçlardan elde edilen yaklaşık değerler ve integrallerin gerçek değerleri arasındaki ilişkiler incelenecektir.Integral inequalities are one of the most important tools used in both theoretical and applied mathematics. In some problems, the exact value of the integral cannot be calculated. In such cases it is necessary to develop approximation methods. Therefore, some mathematicians have studied integral inequalities for various classes of functions. Hermite-Hadamard, Simpson, Ostrowski, Ostrowski, Chebyshev, Grüss and Ostrowski-Grüss inequalities are some of the important inequalities in the literature. For example, Simpson-type integral inequalities play a critical role in mathematical analysis and in solving precision and reliability problems in numerical integration methods. Simpson's Rules, introduced by Thomas Simpson, are important approximation methods used in numerical integration. The simplest of these is the two-core model known as the Simpson 1/3 formula. Simpson's 3/8 rule, also known as Simpson's second formula or Newton's formula, is another approximation method introduced by Thomas Simpson. These approximation methods give the approximate value of an integral. One of the most effective methods used to determine the boundaries of the difference between approximation methods and integrals is integral inequalities. Accordingly, integral inequalities based on Simpson's rules are called Simpson-type inequalities. Recently, many researchers have found many results related to Simpson's inequalities. In this context, more precise results, equivalents and generalised versions of the classical Simpson inequality as well as new Simpson-type inequalities under different assumptions of functions have been studied. In this thesis, in the light of the ongoing work on Simpson-type inequalities based on convex functions, Simpson-type inequalities for higher order differentiable functions will be studied. Firstly, an integral identity involving higher order differentiable functions will be established with the help of the dual kernel. Then, using this identity and convex function properties, Simpson-type integral inequalities will be found. In addition, new Simpson-type approximation methods that can be used in numerical integration will be developed with the help of the results obtained while searching for these inequalities. Furthermore, the relations between the approximations obtained from the Simpson-type results and the real values of the integrals will be analysed
Financial statement analysis company "EK Sistēmas"
No full textDiplomdarba nosaukums ir finanšu pārskatu analīze uzņēmumā “ EK Sistēmas ”.
Diplomdarba mērķis ir novērtēt SIA „EK Sistēmas” finansiālo stāvokli periodā no 2008.-2011.gadam. Autors nolēma izpētīt uzņēmuma finanšu situāciju un izstrādāt priekšlikumus tās uzlabošanai.
Diplomdarbs sastāv no piecām daļām:
1.Uzņēmuma finanšu analīzes nozīme, teorētiskie aspekti, kuri sastāv no analīzes būtības un struktūras, metodēm un paņēmieniem.
2.Uzņēmuma saimnieciskajā darbībā aprakstīti uzņēmuma mērķi un attīstīšanas plāni.
3.Uzņēmuma bilances dinamikas un struktūras analīze, izmantojot horizontālo un vertikālo metodi.
4.Uzņēmuma finanšu pamatrādītāji, 2008.-2011.g. likviditāte, rentabilitāte, aktīvu aprite, finansiālā stabilitāte un maksātspēja.
5.Uzņēmuma bankrota varbūtība.
Diplomdarba apjoms ir 76 lappuses, tas sastāv no 10 daļām un 6 pielikumiem. Darbā ir izmantotas 22 tabulas, 2 attēli un 19 formulas.
Atslēgvārdi: grāmatvedība, analīze, rentabilitāte, likviditāte, maksātspēja, bankrota varbūtība. The title of the diploma work is financial statement analysis company “EK Sistēmas”.
The goal of the diploma work is to evaluate LLC “EK Sistēmas” financial position during the period from year 2008 to 2011. The author decided to research the financial situation of the enterprise and to work out suggestions for improvement.
Diploma work consists of five parts:
1.The role of analysis, theoretical aspects which consists of analysis nature and structure, methods and techniques.
2.The economic activity, company’s goals and development plans.
3.Company’s balance dynamics and structural analysis using the horizontal and vertical approaches.
4.Company’s calculated and analyzed financial fundamental 2008-2011 years liquidity, profitability, asset movement, financial stability and solvency.
5.Company’s probability of bankruptcy.
The amount of the diploma work is 76 pages, consisting of 10 parts and 6 supplements. Diploma work is 22 tables, 2 pictures and 19 formulas are used in this work.
Keywords: accounting, analysis, profitability, liquidity, solvency and probability of bankruptcy
Vatt Samrong Ek: the Inscription, the Buddha Pedestal, and the Numbers
No full textOne of the two dates mentioned on the pedestal of a Buddha image kept at Vatt Samrong Ek (Tra Vinh Province, Vietnam) contains an error in reckoning that has so far not been explained. But if we look at how the intervals between the years involved should have been calculated and how the author actually calculated them, we can see how the error came about.L’une des deux dates contenues dans l’inscription figurant sur le socle d’une
statue de Buddha conservée au Vatt Samrong Ek (dans la province de Tra Vinh au Viêt-nam) est visiblement erronée et cette erreur est restée jusqu’ici inexpliquée.
Toutefois, si l’on se figure comment l’intervalle entre les dates concernées aurait dû être calculé et comment il l’a effectivement été par l’auteur de l’inscription, il est
possible de comprendre comment l’erreur s’est produite.Eade Chris. Vatt Samrong Ek: the Inscription, the Buddha Pedestal, and the Numbers. In: Aséanie 27, 2011. pp. 101-104
Eccentric orbits and apsidal motion in the eclipsing binaries EK Cep and HS Her
No full textWe present the first modern analysis of two young eclipsing binaries, EK Cep and HS Her, based on new ground-based CCD multicolour light curves and the Transiting Exoplanet Survey Satellite (TESS) observations, radial velocity curves, and eclipse timing measurements. The orbital and stellar parameters of the stars are determined by Roche modelling, and their evolutionary status is examined using a grid of isochrones and evolutionary tracks. We find that HS Her is 25-32 Myr old and its components are on the zero-age main sequence (ZAMS); at the age of 16-20 Myr, the primary of EK Cep is also on the ZAMS, but its secondary is a pre-main-sequence star. Both binaries have slightly eccentric orbits and display apsidal motion. Based on updated eclipse timings and spectroscopic evidence, we rule out the presence of a previously hypothesized tertiary component in HS Her. © 2022 The Author(s)
Wage policies and the integration of immigrants
No full textMost Nordic countries struggle with the integration of low-skilled immigrants. Relying on research from primarily the Nordics, we discuss to what extent minimum wage reductions can improve labour market prospects for immigrants, whether unskilled and low-pay jobs serve as stepping stones to more qualified and higher-paid jobs and how wages of incumbent workers would be affected by lower minimum wages. We argue that targeted minimum wage reductions aimed at new, previously non-existing jobs and increased differentiation of minimum wages according to experience provide an appropriate balance between the conflicting goals of high employment and low wage inequality.This is a slightly longer version of Ek and Skedinger (2019), We thank Pernilla Andersson Joona, the editors, participants at the seminar arranged by Nordregio on November 6, 2018, and an anonymous reviewer for valuable comments and suggestions. The second author gratefully acknowledges financial support from Jan Wallanders och Tom Hedelius stiftelse and the Marianne and Marcus Wallenberg Foundation.</p
Outside the frame : images of femininity and masculinity in "Swan Lake" and "Giselle" with choreography by Mats Ek
No full textThe aim of this study is to analyze the possibilities and strategies for constructing images of the body in the art of dance, as well as to describe the discourse of carnality created by dance. The author uses a methodology based on critical theory. Research material, i.e. the choreography by Mats Ek, allow to applied to the study categories "the scene" and "the obscene" created by Lynda Nead. Through the analysis of movements, gestures and postures used in the different styles of Western dance, the author approaches to describe images of femininity and masculinity created by the art of dance
jaguar negro
No full textLa información de esta miniguía se basa, a la fecha de publicación de la misma, en los trabajos de los arqueólogos George Bey, William Ringle, Desiré Charnay, Juan Gutiérrez picón, Silvia Garza Tarazona, Carlos Peraza Lope y Carlos Pérez Álvarez.Según investigaciones recientes el sitio fue habitado desde el periodo Preclásico Superior y Clásico Temprano (1 00 a.C.-300 d.C.) hasta la conquista española y la colonia. De acuerdo con los resultados de diversas investigaciones arqueológicas el surgimiento de este sitio, como emplazamiento relevante, pudo haber tenido lugar en algún momento entre los años 400-600 d.C., correspondientes al periodo Clásico Temprano del área maya.</p
Competent genetic-evolutionary optimization of water distribution systems
No full textA genetic algorithm has been applied to the optimal design and rehabilitation of a water distribution system. Many of the previous applications have been limited to small water distribution systems, where the computer time used for solving the problem has been relatively small. In order to apply genetic and evolutionary optimization technique to a large-scale water distribution system, this paper employs one of competent genetic-evolutionary algorithms - a messy genetic algorithm to enhance the efficiency of an optimization procedure. A maximum flexibility is ensured by the formulation of a string and solution representation scheme, a fitness definition, and the integration of a well-developed hydraulic network solver that facilitate the application of a genetic algorithm to the optimization of a water distribution system. Two benchmark problems of water pipeline design and a real water distribution system are presented to demonstrate the application of the improved technique. The results obtained show that the number of the design trials required by the messy genetic algorithm is consistently fewer than the other genetic algorithms
Piezoelectric-based apparatus for strain tuning
No full textThe authors thank the UK Engineering and Physical Sciences Research Council and the Max Planck Society for financial support.We report the design and construction of piezoelectric-based apparatus for applying continuously tuneable compressive and tensile strains to test samples. It can be used across a wide temperature range, including cryogenic temperatures. The achievable strain is large, so far up to 0.23% at cryogenic temperatures. The apparatus is compact and compatible with a wide variety of experimental probes. In addition, we present a method for mounting high-aspect-ratio samples in order to achieve high strain homogeneity.Peer reviewe
La relación de la literatura y la historia a través de la hipertextualidad en Ixbalam-ek’ de Ruperta Bautista
No full textThis article seeks to explore the link between literature and history in contemporary indigenous literature, with the novel Ixbalam-ek ‘ by the Tsotsil author Ruperta Bautista, through Gerald Genette’stheory of hypertextuality. It is intended to demonstrate, by means of four of the seven categories that integrate hypertextuality, how the novel presents a connection with ancient Mayan texts such as the Popol Vuh and the Chilam Balam.El presente artículo busca explorar el vínculo de la literatura y la historia en la literatura indígena contemporánea, en la novela Ixbalam-ek’ de la autora tsotsil Ruperta Bautista, a través de la teoríade la hipertextualidad de Gerald Genette. Se pretende demostrar por medio de cuatro de las siete categorías que integran a la hipertextualidad, cómo la novela presenta una conexión con antiguos textos mayas como el Popol Vuh y el Chilam Balam
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