National Repository of Grey Literature 87 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Information filtering in XML documents
Pilátová, Michaela ; Pokorný, Jaroslav (advisor) ; Kopecký, Michal (referee)
With a growing amount of information available on the Internet and by other technologies, there is a growing need to distribute data to individua/ users as fast as possible - and only to those who are interested. Publish-subscribe systems allow users to specify their interes/s using profi/es created with an appropriate query language, thus order receiving required information from all available sources contributing to the syslem. The XML language nowadays belongs to the most important standards used for data exchange. This thesis deals with publish-subscribe systems working with data in XML data forma!. Methods of effective filtration of XML data and general techniques used in publish-subscribe systems for delivery of pertinent data to users are discussed there. Also, a prototype of a simple publish-subscribe syslem working with XML - Xm/Part - is implemented. A couple of techniques connected to information delivery is implemented and tested using this syslem on real data. Powered by TCPDF (
The motor and cognitive consequences of inborn cerebellar degeneration and some possibilities how to influence it
Křížková, Alena ; Vožeh, František (advisor) ; Pokorný, Jaroslav (referee) ; Mareš, Jan (referee)
The motor and cognitive consequences of inborn cerebellar degeneration and some possibilities how to influence it The cerebellum is traditionally considered to be a coordinator of movements and equilibrium and a regulator of muscular tone. Participation of the cerebellum on the motor learning has been discovered later. Besides that, there is increasing experimental and clinical evidence supporting the idea of an important role of the cerebellum in common cognitive functions. Increasing number of experimental works - especially those on animals - demonstrate an effect of the the cerebellum on the memory and different types of learning. A suitable model to study the cerebellar degeneration are Lurcher mutant mice. During their lives, there is a progressive loss of Purkinje cells followed by a loss of granular cells and inferior oliva neurons. We concentrated on the following problems in this work: - development of motor learning and topical motor skills during the first month of life - positive and negative changes in NO synthesis and subsequent effect on discriminative learning - effect of administration of MK-801(non-competitive antagonist of NMDA receptors) on discriminative learning of Lurcher mutants and wild mice derived from two strains (C3H and C57B1/7). Lurcher mutants and wild mice were put in motor...
Updating XML data
Mikuš, Tomáš ; Pokorný, Jaroslav (advisor) ; Holubová, Irena (referee)
Updating XML data is very wide area, which must solve a number of difficult problems. From designing language with sufficient expressive power to the XML data repository able to apply the changes. Ways to deal with them are few. From this perspective, is this work very closely dedicated only to the language XQuery. Thus, its extension for updates, for which the candidate recommendation by the W3C were published only recently. Another specialization of this work is to focus only on the XML data stored in the object­relational database with that repository will enforce the validity of documents to the scheme described in XML Schema. This requirement, combined with the possibility of updating of data in the repository is on the contradictory requirements. In this thesis is designed language based on XQuery language, designed and implemented evaluating of the update queries of the language on the store and a description and implementation of the store in object­relational database.
Analytical Processing of XML documents
Melichárek, Petr ; Pokorný, Jaroslav (advisor) ; Toman, Kamil (referee)
In this diploma thesis we present XQuery analytic extension containing clauses well known from SQL language - group by, roll up and cube. In addition we introduce new clause, called topological roll up. The native XML database eXist is an environment for the extension implementation. We add a module, containing earlier mentioned clauses, to the eXist database. We can use implemented clauses as user de ned functions in XQuery language for querying database's documents. Tests have proved that functions are useful in practice. Even for large XML documents and complex queries.
Preference Top-k Search Based on Multidimensional B-tree
Ondreička, Matúš ; Pokorný, Jaroslav (advisor) ; Theobald, Martin (referee) ; Gurský, Peter (referee)
Title: Preference Top-k Search Based on Multidimensional B-Tree Author: RNDr. Matúš Ondreička Department: Department of Software Engineering Faculty of Mathematics and Physics Charles University in Prague Supervisor: Prof. RNDr. Jaroslav Pokorný, CSc. Author's e-mail address: Supervisor's e-mail address: Abstract: In this thesis, we focus on the top-k search according to user pref- erences by using B+ -trees and the multidimensional B-tree (MDB-tree). We use model of user preferences based on fuzzy functions, which enable us to search according to a non-monotone ranking function. We propose model of sorted list based on the B+ -tree, which enables Fagin's algorithms to search for the top-k objects according to a non-monotone ranking function. We apply this model in the Internet environment with data on different remote servers. Furthermore, we designed novel dynamic tree-based data structures, namely, MDB-tree composed of B+ -trees, MDB-tree with lists, MDB-tree with groups of B+ -trees and multiple-ordered MDB-tree. Concurrently, we have developed novel top-k algorithms, namely, the MD algorithm, the MXT algorithm and their variants which are able search for the top-k objects ac- cording to a non-monotone ranking function. These top-k algorithms are efficient...
Relační přístup k indexaci
Prukl, Antonín ; Pokorný, Jaroslav (advisor) ; Skopal, Tomáš (referee)
In order to achieve efficient evaluation of SQL queries, database systems provide its users with set of integrated index access methods. When a new access method is required for various reasons, one of the possibilities to implement such method in a relational DBMS is the way of exploiting relational tables of given database system. This approach does not involve any internal changes of database system kernel and thus it is available to all developers even when the target DBMS is not distributed as an open source. In the terms of extensible database architecture, only the availability to extend existing DBMS with a new data type is required. In this work, UB-Tree index has been integrated into Oracle DBMS in such way. Index related tables have been designed in two different ways and four alternatives to evaluate relevant queries have been proposed and studied. Finally, several experiments have been done to compare performance of an access method implemented via the relational approach and a native kernel integration of the same method.
Ljubopytnov, Vladimír ; Pokorný, Jaroslav (advisor) ; Húsek, Dušan (referee)
This thesis focuses on mapping latest knowledge in the area of web mining with emphasis on document clustering. Most attention is given to the DOC projective clustering algorithm, a modification is presented for data with weighted dimensions. Algorithm is used for web search engine result clustering. Also, a clustering package with Google interface and phrase evaluation tool is implemented.
Abilities and importance long-term cultivation embryonic cells from different species of animals
Houdek, Zbyněk ; Vožeh, František (advisor) ; Bártová, Eva (referee) ; Pokorný, Jaroslav (referee)
Embryonic cells inside the blastocyst, which divide and differentiate into cells of all tissues of organism, are called embryonic stem (ES) cells. Using the ES cells for transplantations is one the potential ways in regenerative medicine. The present study deals with two different lines of mouse pluripotent cells: embryonic carcinoma (EC) cells line P19 and ES cells line D3. The in vitro cultivation was performed in basal cultivation medium with fetal bovine serum (FBS) and in addition of leukemia inhibitory factor (LIF) in case of ES cells. The neurodifferentiation was induced by medium without FBS and without LIF in case of ES cells and supported by retinoic acid in case of P19 cells and embryoid bodies cultivation in case of ES cells. Pluripotency and neurodifferentiation of the cells were confirmed by presence of molecular markers of pluripotency and neurodifferentiation in both lines in nondifferentiated and differentiated states. Mouse EC P19 cells were transfected by gene for green fluorescent protein (GFP) and used for transplantation in cerebellum of wild type (WT) and Lurcher (Lc) mutant mice. Nondifferentiated cells (P19) and neuroprogenitors (NPG) derived from these cells were used. The study followed the survival, morphology and localization of the grafts. The survival of both types of GFP...
Processing pages responded by a search engine via data mining techniques
Zeman, Lukáš ; Pokorný, Jaroslav (advisor) ; Kopecký, Michal (referee)
Using works [1] and [2] study Page Content Rank algorithm a its implementation. Use work [3] as opening literature. The goal of this thesis is to improve the algorithm, especially for its parameters estimation, do experiments on various training sets, search queries and find criteria for their evaluation.

National Repository of Grey Literature : 87 records found   1 - 10nextend  jump to record:
See also: similar author names
13 Pokorny, Josef
4 Pokorný, J.
14 Pokorný, Jakub
86 Pokorný, Jan
86 Pokorný, Jan
1 Pokorný, Jindřich
3 Pokorný, Jindřich,
46 Pokorný, Jiří
13 Pokorný, Josef
2 Pokorný, Josef,
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