|
|
Framework Meteor as a web environment for developing applications
Zvyagintseva, Daria ; Pavlíčková, Jarmila (advisor) ; Říha, Jan (referee)
This bachelor thesis describes framework Meteor as a web environment for developing applications. The main goal of this work is to describe the properties of the framework, to write documentation in the Czech language and to design and develop the own application. The bachelor thesis is divided into the theoretical and practical parts. The theoretical part describes real-time frameworks, node.js frameworks and mainly describes the technical functionality, properties, structure of Meteor framework. Practical part consists of design and developing of own application. The last part of the thesis is the Meteor's assessment whether this platform is applicable for the development of real-time web applications. The main workload is a detailed but simple written overview of the Meteor framework and also a fully functional real-time Web application Nabidni.mi. This bachelor thesis could be used in the future for study purposes at universities or as a tutorial for programmers who are just starting with web application programming. The work is one of a few sources describing the Meteor framework in the Czech language.
|
|
|
Artificial Intelligence Approach to Credit Risk
Říha, Jan ; Baruník, Jozef (advisor) ; Vošvrda, Miloslav (referee)
This thesis focuses on application of artificial intelligence techniques in credit risk management. Moreover, these modern tools are compared with the current industry standard - Logistic Regression. We introduce the theory underlying Neural Networks, Support Vector Machines, Random Forests and Logistic Regression. In addition, we present methodology for statistical and business evaluation and comparison of the aforementioned models. We find that models based on Neural Networks approach (specifically Multi-Layer Perceptron and Radial Basis Function Network) are outperforming the Logistic Regression in the standard statistical metrics and in the business metrics as well. The performance of the Random Forest and Support Vector Machines is not satisfactory and these models do not prove to be superior to Logistic Regression in our application.
|
|
| |
|
|
Financial Risk Measures: Review and Empirical Applications
Říha, Jan ; Šopov, Boril (advisor) ; Krištoufek, Ladislav (referee)
This thesis focuses on several classes of risk measures, related axioms and properties. We have introduced and compared monetary, coherent, convex and deviation classes of risk measures and subsequently their properties have been discussed and in selected cases demonstrated on data. Furthermore the relatively promising and advanced class of risk measures, the spectral risk measures, has been introduced. In addition to that we have outlined selected topics from portfolio theory that are relevant for applications of selected risk measures and then derived theoretical solution of portfolio selection using chosen risk measures. In the end we have highlighted the potential consequences of improper employment of certain risk measures in portfolio optimization.
|
|
|
Advanced methods of Linear Cryptanalysis
Říha, Jan ; Rudolf, Bohuslav (advisor) ; Hojsík, Michal (referee)
In the present work we study advanced methods of linear cryptanalysis. At the beginning, we describe the principle of Matsui's linear cryptanalysis, the two basic algorithms - Algorithm 1 and Algorithm 2, against DES cipher. Further it is described a generalization of linear cryptanalysis and consequently partitioning and statistical cryptanalysis. Then it is followed by a look on the linear approximations over the correlation matrices. Furthermore, we study an improvement of Matsui's Algorithm 2 using Fast Fourier transform, based on circulant matrices theory. Finally we deal multidimensional linear cryptanalysis that uses multiple linear approximations and in the very end we propose an own design of improvement of multidimensional extension of Algorithm 2 by using Fast Fourier transform.
|
|
|
Serve and return tactics according to the type of tennis surface
Říha, Jan ; Kočíb, Tomáš (advisor) ; Psotta, Rudolf (referee)
SOUHRN: Název: Taktika podání a příjmu podání podle typu povrchu dvorce Serve and return tactics according to the type of the tennis surface Cíle práce: Analýza taktického použití podání a příjmu podání v tenise při hře na travnatých, středně rychlých a antukových površích u předních světových hráčů s následujícím doporučením pro trenérskou praxi. Metoda: Ve výzkumu bylo sledováno celkem 30 vybraných sad z třiceti utkání, z toho 10 na každém z hlavních typů povrchu. Sledování se týkalo mužské kategorie hráčů do stého místa v žebříčku ATP z turnajů v letech 2006 a 2007. Pro sběr dat byla použita metoda nepřímého strukturovaného pozorování a pro jejich analýzu metoda popisná a komparativní. Výsledky: Osvětlují rozdílnost taktického využití podání a příjmu podání v závislosti na typu povrchu dvorce. Klíčová slova: Dvouhra, podání a příjem, taktika, videoanalýza.
|
|
|
Modern Guidelines Dietary and Dietary Myths
Říha, Jan ; Dlouhý, Pavel (advisor)
This work supposed to be a simplified and comprehensive overview of the basic nutrition recommendations for citizens. The work is divided into two main chapters - conclusions. The first chapter of conclusions informs a common consumer about the basic expressions used in nutrition and also presents a list of products containing basic nutrients and main risks connected with undue/insufficient consummation of such substances. This chapter educate the common consumer and gives him a chance to better orientation among offered foodstuff. The consumer is therefore able to decide more rationally which recommendations is more suitable for him and why. Very important aim of this chapter is so to provide such information that the common consumer could demark unscientific nutrition suggestions (advertisement) from recommendations positively affecting his health. In the second part of the first chapter are presented data according to which one can follow up and alternate a quantity of received energy, advices about BMI and values where lose of weight are already dangerous. The second chapter of conclusions presents the set of nutrition recommendations that were in the most cases introduced in the corresponding chapters. The suggestions are presented by Society for Nutrition in the Czech Republic and Department of...
|
|
| |
|
|
The design and cryptanalysis of the AES (Advanced Encyption Standard)
Říha, Jan ; Vábek, Jiří (referee) ; Tůma, Jiří (advisor)
Nazev prace: Konstrukce a kryptoanalyza AES (Advanced Encyption Standard) Autor: Jan Říha Katedra: Katedra Algebry Vedouci bakalafske prace: Doc. RNDr. Jin Tuma, DrSc. E-mail vedouciho bakalafske prace: Jiri.Tuma@mff.cuni.cz Abstrakt: V pfedlozene praci studujeme nejnovejsi symetrickou blokovou sifru AES. Nejprve se zabyvame vyvojem a vznikem sifry od vypsani souteze a2 po vyhlaseni vitezneho kandidata. Pote se venujeme jejf konstrukci, ve ktere se vyuziva nekterych netrivialnich poznatku algebry pfi praci s polynomy nad konecnym telesem. V teto kapitole je tez popsana prima inverzni sifra a ekvivalentni inverzni sifra slou^ici k desifrovani zasifrovanych dat. Ve tfeti kapitole zkoumame navrhovane implementace sifry AES na jednotlive platformy a nakonec rozebirame mozne utoky a odolnost Sifry AES vuci nim. Klicova slova: AES, sifra, implementace, kryptoanalyza Title: The design and cryptanalysis of the AES (Advanced Encyption Standard) Autor: Jan ftiha Department: Department of Algebra Supervisor: Doc. RNDr. Jin Tuma, DrSc. Supervisor's e-mail address: Jiri.Tuma@mff.cuni.cz Abstract: In the present work we study the newest symetric block cipher AES. At first we consider development and creation of the cipher from the start of selection proces till announcement of winning candidate. Then we turn to its...
|
|
|
Evaluation the Financial Situation of the Selected Business Entity
Říha, Jan ; Pfeiferová, Daniela (advisor) ; Romana, Romana (referee)
The aim of the thesis is to evaluate the financial situation of the selected company Eutit Ltd. for a selected period. The firm is the world's largest producer of fused basalt. Assessing the financial situation will be made for the period 2012-2015.
The theoretical part focuses on the theoretical foundations of financial analysis, describes its objectives, principles of the method used most in practice provides a current view on the issue of financial analysis.
The practical part describes the selected company, its history and present. For the evaluation of economic situation of company Eutit Ltd. was the use of horizontal, vertical analysis, financial ratios analysis using bankruptcy or credibility models. Subsequently, the calculated values of indicators will be compared with the industry average values.
In conclusion, the evaluated results of the financial analysis are to determine the overall economic effectiveness of the selected company with evaluated as very positive.
|
guest ::
