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Search Results: 1 - 10 of 1101 matches for " Grzegorz "
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New Method for Measurement of Plant Roots Specific Surface  [PDF]
Grzegorz , Jozefaciuk, Malgorzata Lukowska
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.45135

To provide enough space to carry all surface charges responsible for high cation exchange capacity of plant roots, large area of the root specific surface is necessary, however all experimental methods used up to date give too small surface area values. In this paper, we propose to measure the plant roots surface area using water vapor adsorption isotherm. This method gives roots specific surface areas compatible to CEC. Methodical aspects of the measurements are described along with theoretical background for calculating specific surface area on the example of roots of barley grown in nutrient solution.

Decentralization of a Multi Data Source Distributed Processing System Using a Distributed Hash Table  [PDF]
Grzegorz Chmaj, Shahram Latifi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2013, DOI: 10.4236/ijcns.2013.610047
Abstract: A distributed processing system (DPS) contains many autonomous nodes, which contribute their own computing power. DPS is considered a unified logical structure, operating in a distributed manner; the processing tasks are divided into fragments and assigned to various nodes for processing. That type of operation requires and involves a great deal of communication. We propose to use the decentralized approach, based on a distributed hash table, to reduce the communication overhead and remove the server unit, thus avoiding having a single point of failure in the system. This paper proposes a mathematical model and algorithms that are implemented in a dedicated experimental system. Using the decentralized approach, this study demonstrates the efficient operation of a decentralized system which results in a reduced energy emission.
Statechart-based Controllers Synthesis in FPGA Structures with Embedded Array Blocks
Grzegorz abiak , Grzegorz Borowik
International Journal of Electronics and Telecommunications , 2010, DOI: 10.2478/v10177-010-0002-7
Abstract: Statechart diagrams, in general, are visual formalism for description of complex systems behaiour. Digital controllers, which act as reactive systems, can be very conveniently modeled with statecharts and efficiently synthesized in modern programmable devices. The paper presents in details syntax and semantics of statecharts and new implementation scheme. The issue of statecharts synthesis is not still ultimately solved. Main feature of the presented approach is the transformation of statechart diagrams into Finite State Machine, and through KISS format, functional decomposition and mapping into Embedded Memory Blocks. Embedded Memory are part of the modern programmable devices.
Periodic solutions for nonautonomous differential equations and inclusions in tubes
Grzegorz Gabor
Abstract and Applied Analysis , 2004, DOI: 10.1155/s1085337504403042
Abstract: We study the existence of periodic trajectories for nonautonomous differential equations and inclusions remaining in a prescribed compact subset of an extended phase space. These sets of constraints are nonconvex right-continuous tubes not satisfying the viability tangential condition on the whole boundary. We find sufficient conditions for existence of viable periodic trajectories studying properties of the exit subset of the tube. A new approximation approach for continuous multivalued maps is presented.
A de Casteljau Algorithm for -Bernstein-Stancu Polynomials
Grzegorz Nowak
Abstract and Applied Analysis , 2011, DOI: 10.1155/2011/609431
Abstract: This paper is concerned with a generalization of the -Bernstein polynomials and Stancu operators, where the function is evaluated at intervals which are in geometric progression. It is shown that these polynomials can be generated by a de Casteljau algorithm, which is a generalization of that relating to the classical case and -Bernstein case.
Novel Insights into the Role of Caveolin-2 in Cell- and Tissue-Specific Signaling and Function
Grzegorz Sowa
Biochemistry Research International , 2011, DOI: 10.1155/2011/809259
Abstract: Caveolin-2 is one of the major protein components of cholesterol- and glycosphingolipid-rich flask-shaped invaginations of plasma membrane caveolae. A new body of evidence suggests that caveolin-2 plays an important, and often more direct, role than caveolin-1 in regulating signaling and function in a cell- and tissue type-specific manner. The purpose of this paper is to primarily focus on discussing how these recent discoveries may help better understand the specific contribution of caveolin-2 to lipid raft- and caveolae-regulated cell/tissue-specific signaling and functions.
Some aspects of molecular diagnostics in Lynch syndrome
Grzegorz Kurzawski
Hereditary Cancer in Clinical Practice , 2006, DOI: 10.1186/1897-4287-4-4-197
Abstract: More than 90 years ago, Warthin described a family in which members from several generations died at a young age because of colorectal cancer (CRC) or carcinoma of the endometrium [1]. The clinical characteristics of this disorder, called hereditary non-polyposis colorectal cancer (HNPCC) or Lynch syndrome, which was the reason for the early dead cases in that family, were shown many years later by Lynch [2]. The members of families with Lynch syndrome are particularly at risk of developing cancers of the colon and endometrium inherited as monogenic disorders with high penetration in an autosomal dominant manner. Today it is well known that this disorder results from a mutation carrier state in one of the mutator genes and can be defined as hereditary deficiency of mismatch repair (MMR) activity. There are at least four genes definitely associated with HNPCC, and these include MLH1 [3], MSH2 [4], MSH6 [5] and PMS2 [6]. Two further genes, MLH3 and PMS1, have also been implicated in HNPCC, but their role is less clear [7-9]. The majority of mutations lead to truncation of the encoded protein (based on the Insight database - http://www.insight-group.org/ webcite). Usually, pathogenicity of mutations is caused by the loss of an important protein domain or a change of structure in the site of interaction with other mismatch repair proteins. Deficiency of MMR activity manifested as microsatellite instability (MSI) and loss of expression of mutated genes in cancer has been used as a preselective factor in many diagnostic procedures, also investigated by the author [10,11]*.At first, diagnosis of this syndrome was based mainly on the Amsterdam criteria (Table 1), which were proposed by the International Collaborative Group on HNPCC - ICG-HNPCC [12].Afterwards, these criteria were expanded [13] by adding cancers characteristic for HNPCC tumours such as: endometrium, small intestine, urinary tract (HNCCP related cancer - HNPCC-rc). Despite all the modifications, it appears th
Fluctuations, correlations and non-extensivity
Wilk, Grzegorz;
Brazilian Journal of Physics , 2007, DOI: 10.1590/S0103-97332007000500009
Abstract: the present status of investigations on fluctuations and correlations seen in high energy multiparticle production processes made using the notion of nonextensivity is reviewed.
Colonization by mites of glacier-free areas in King George Island, Antarctica
Gryziak, Grzegorz;
Pesquisa Agropecuária Brasileira , 2009, DOI: 10.1590/S0100-204X2009000800013
Abstract: this work aimed to investigate the ratio of colonization by terrestrial mites on ice-free areas created by the ongoing climate-induced melting of antarctic glaciers. glacier retreat opens new ice-free areas for the colonization by vegetation and animals. the study was undertaken on the antarctic specially protected area no. 128 (west coast of the admiralty bay, king george island, south shetlands islands). transects marked between the ecology, baranowski and windy glaciers, and a sea shore were used to collect soil samples. oribatid mites were found only on near-shore areas, on patches of vegetation of more than 30 years of age. the colonization by mite communities is strongly determined by the presence of plants.
Veblen Hierarchy
Grzegorz Bancerek
Formalized Mathematics , 2011, DOI: 10.2478/v10037-011-0014-5
Abstract: The Veblen hierarchy is an extension of the construction of epsilon numbers (fixpoints of the exponential map: ωε = ε). It is a collection φα of the Veblen Functions where φ0(β) = ωβ and φ1(β) = εβ. The sequence of fixpoints of φ1 function form φ2, etc. For a limit non empty ordinal λ the function φλ is the sequence of common fixpoints of all functions φα where α < λ. The Mizar formalization of the concept cannot be done directly as the Veblen functions are classes (not (small) sets). It is done with use of universal sets (Tarski classes). Namely, we define the Veblen functions in a given universal set and φα(β) as a value of Veblen function from the smallest universal set including α and β.
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