2010 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2010

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Comparing Arbitrary Unrooted Phylogenetic Trees Using Generalized Matching Split Distance
- Damian Bogdanowicz
- Krzysztof Giaro
2010
In the paper, we describe a method for comparing arbitrary, not necessary fully resolved, unrooted phylogenetic trees. Proposed method is based on finding a minimum weight matching in bipartite graphs and can be regarded as a generalization of well-known Robinson-Foulds distance. We present some properties and advantages of the new distance. We also investigate some properties of presented distance in a common biological problem of finding a single phylogenetic tree (consensus tree) that reliably represents a set of various phylogenetic trees. Finding a consensus tree (or a small set of such trees) is an important phase in phylogenetic research, especially if a method that is chosen for construction process returns a set of trees (for example a very popular - Bayesian approach).
Comparing N3-60 cascade exit angles obtained from tunnel measurements and numerical calculations
- Rafał Biernacki
- Piotr Krzyślak
2010 Pełny tekst Polish Maritime Research
The article compares the results of measurements performed in the aerodynamic tunnel at CUT and numerical simulation carried out for a plane cascade of N3-60 profiles. Comparing the measured and calculated results provides opportunities for assessing the range of systematic differences between simulation predictions and actual experimental results.
Comparison of bioactive compounds, antioxidant and antiproliferative activities of Mon Thong durian during ripening
- Ratiporn Haruenkit
- Sumitra Poovarodom
- Suchada Vearasilip
- Jacek Namieśnik
- Magdalena Śliwka-Kaszyńska
- Yong-Seo Park
- Buk-Gu Heo
- Ja-Yong Cho
- Hong Gi Jang
- Shela Gorinstein
2010 FOOD CHEMISTRY
Celem przeprowadzonych badań było oszacowanie zmian zawartości związków odżywczych, związków bioaktywnych, kwasów tłuszczowych oraz przeciwutleniaczy w owocach duriana w trakcie różnych etapów procesu dojrzewania. W badaniach wykorzystano testy CURRAC, DPPH, ABTS i FRAP. Stwierdzono, że całkowita zawartość polifenoli, flawonoidów, kwasu askorbimowego, tanin oraz poziom aktywności przeciwutleniającej jest dla owoców niedojrzałych, dojrzałych oraz przejrzałych zdecydowanie różna. Spektogramy FTIR dla polifenoli oraz profile kwasów tłuszczowych i związków przeciwutleniających uzyskane z wykorzystaniem techniki HPLC mogą być traktowane jako wskaźniki charakterystyczne dla przebiegu procesu dojrzewania tych owoców.
Comparison of different extraction techniques of polychlorinated biphenyls from sediments samples.
- Agata Mechlińska
- Lidia Wolska
- Jacek Namieśnik
2010 ANALYTICAL LETTERS
In this work, problems that may occur during determination of trace levels of polychlorinated biphenyls in sediment samples are described. Main error sources are connected with extraction of analytes prior to final determination. During model studies, polychlorinated biphenyls have been extracted from sedimentreference material (METRANAL 2) with the use of different solvents (dichloromethane, hexsane, and toluene); the process has been enhanced by mechanical shaking or ultrasounds.Seven selected PCBs (PCB 28, 52, 101, 118, 138, 153, and 180 - according to IUPAC) were determined in extracts samples by GC-MS technique. During the studies, two calculation methods were applied to determine the amount of analytes introduced to the chromatographic column. The first approach assumes that the recovery of PCBs that contained a small amount of chlorine atoms in the molecule is similarto the recovery of 13C12PCB28 standard, whereas compounds with greater number ofchlorine atoms in the molecule will be recovered from the sediment similarly to the recoveryof 13C12PCB180 standard. The second approach assumes that the recovery of PCB 138 and PCB 153 is similar to the average value of 13C12PCB28 and 13C12PCB180 standards. In the case of shaking assisted extraction, 55-90% PCB recoveries were achievedwhen toluene was used as a solvent, while 71-86% recovery was achieved when dichloromethane was used. When hexsane was used as solvent, recovery ranged 43-107%. In the case of ultrasounds assisted extraction, PCB recoveries of 50-108% were achieved when toluenewas used as solvent, while 44-101% recovery was achieved when dichloromethane was applied. When hexsane was used as solvent, recovery reached 57-95%. Studies have also shown that, when applying different isolation techniques and different solvents, the recovery of applied 13C12PCB28 and 13C12PCB180 standards is different.Recovery of 13C12PCB28 standard was from 5% (for hexane tenfold extraction assisted by shaking) to 57% (for toluene tenfold extraction assisted by shaking). However, recovery of 13C12PCB180 standard was from 9% (for hexane tenfold extraction assisted by shaking) to 82% (for toluene tenfold extraction assisted by shaking). This is due to the differences of their binding to the sludge matrix. Standard with a greater number of chlorine atoms in the molecule (13C12PCB180) is more weakly associated with sediment than 13C12PCB28 standard. In order to improve the accuracy of the results obtained, it is necessary to use labeled PCB compounds.
Comparison of disk and tube methods for estimation of biostatic properties of polyurethanes based on synthetic poly[(R,S)-3-hydroxybutyrate
- Joanna Brzeska
- Maria Rutkowska
- Izabela Steinka
- Anita Kukułowicz
- Helena Janik
2010
The influence of novel aliphatic polyurethanes on growth of Staphyloccocus aureus (SA)in the around of polymer samples has been estimated by disk method. It was staed that the growth of SA was inhibited.The influence of polyurethanes on planctonic Staphyloccocus aureus was also pefrormed by tube method. In this test the slight decrease of bacteria concentration was noticed.
Comparison of efficiency of different sorbents used during clean-up of extracts for determination of polychlorinated biphenyls and pesticide residues in low-fat food
- Angelika Beyer
- Marek Biziuk
2010 FOOD RESEARCH INTERNATIONAL
Określono przydatność i zakres zastosowania kolumienek sorpcyjnych zawierających złoża różnych sorbentów wykorzystywanych do oczyszczania ekstraktów z żywności o zawartości do 20 % tłuszczu z wykorzystaniem techniki ekstrakcji do fazy stałej (SPE). Udowodniono, że zastosowanie kolumienek sorpcyjnych zawierających złoże żelu krzemionkowego modyfikowanego fazą aminopropylową, tlenku glinu bądź krzemianu magnezu do oczyszczania ekstraktów zawierających związki chloroorganiczne z pozostałości lipidów, gwarantuje wysokie wartości odzysków analitów, przy jednoczesnym dobrym oczyszczeniu ekstraktów. Przedstawiono schemat opracowanej procedury oczyszczania ekstraktów żywności zawierających związki chloroorganiczne z wykorzystaniem techniki ekstrakcji do fazy stałej.
Comparison of immune response in sheep immunized with DNA vaccine encoding Toxoplasma gondii GRA7 antigen in different adjuvant formulations
- Elżbieta Hiszczyńska-Sawicka
- Li Hong
- Janet Boyu Xu
- Gabriela Olędzka
- Józef Kur
- Roy Bickerstaffe
- Mirosław Stankiewicz
2010 EXPERIMENTAL PARASITOLOGY
Praca przedstawia badania dotyczące odpowiedzi immunologicznej owiec immunizowanych plazmidowym DNA kodującym antygen granul GRA7 Toxoplasma gondii w trzech różnych formulacjach adjuvanta. Sześćdziesiąt owiec było szczepionych domięśniowo z DNa plazmidów. Dwanaście otrzymało liposomową formę plazmidu pVAXIgGRA7, 12 formulację z Emulsigen P plazmidu pVAXIgGRA7 1 12 formulację z Emulsigen D plazmidu pVAXIgGRA7. Wszystkie zwierzęta były inokulowane dwukrotnie z 4 tygodniowym odstępem. Immunizacja owiec z plazmidami kodującymi GRA7 z różnymi formulacjami adjuvanta efektywnie stymulowała odpowiedź immunologiczną. Otrzymane wyniki wskazują, że domięśniowa immunizacja owiec z DNA szczepionką z adjuvantem liposomowym i Emulsigen D indukuje znaczącą odpowiedź immunologiczną przeciwko T. gondii.
Comparison of Ion Chromatography and Isotachophoresis for the Determination of selected Anions in Atmospheric Wet Deposition Samples
- Kamila Klimaszewska
- Piotr Konieczka
- Żaneta Polkowska
- Tadeusz Gorecki
- Jacek Namieśnik
2010 Pełny tekst POLISH JOURNAL OF ENVIRONMENTAL STUDIES
W pracy przedstawiono porównanie wyników oznaczenia zawartości wybranych anionów w próbkach opadów atmoferycznych z zastosowaniem technik izotachoforezy i chromatografii jonowej. Na podstawie otrzymanych wyników można stwierdzić, że technika chromatografii jonowej charakteryzuje się niższymi wartościami granic wykrywalności i oznaczalności, szerokim zakresem pomiarowym i możliwością oznaczania analitów w próbkach o róznym składzie matrycy. W przypadku obu porównywanych technik nie zaobserwowano istotnych różnic w zakresie czaso i pracochłonności.
Comparison of PM10 concentration in Gdansk and London using electron microscopy
- Barbara Zamek-Gliszczyńska
- Helena Janik
- Alan Reynolds
- Przemysław Sielicki
2010
Particulate matter (PM) has been considered as one of the most dangerous elements of air pollution. Multiply analytical methods are employed to identify the composition of particles present in the air. The theoretical part of this work is a description of different research centres all over the world where particulate matter is being analyzed using various techniques. The purpose of this project is to analyze and compare particles called PM 10 (particles of 10 micrometers or less) present in the air in different cities. In order to determine the composition and size of particles a scanning electron microscope (SEM) and transmission electron microscope (TEM) equipped with EDX analyzer were used. The TEM analysis gave similar results with additional information of the presence of magnesium and iron in the samples. Finally size distribution was obtained. Size ratio of most of the particles vary from 1,5 to 2. Comparison of size measurements using TEM and SEM techniques showed small differences caused by various sizing methods and different accuracy of microscopes. This work was supported by Ministry of Higher Education and Science grant no. NN305 366338
Comparison of reproduction strategies in genetic algorithm approach to graph searching
- Łukasz Wrona
- Bartosz Jaworski
2010 Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne
genetic algorithms (ga) are a well-known tool used to obtain approximate solutions to optimization problems. successful application of genetic algorithm in solving given problem is largely dependant on selecting appropriate genetic operators. selection, mutation and crossover techniques play a fundamental role in both time needed to obtain results and their accuracy. in this paper we focus on applying genetic algorithms in calculating (edge) search number and search strategy for general graphs . our genetic representation of problem domain is based on representing search strategy as a permutation of edges and fitness function is based on the number of searchers needed to perform a given strategy. our implementation of ga is utilized to compute search strategies for selected graph classes. we compare and discuss results obtained while employing different reproduction strategies.
Comparison of residual current devices tripping characteristics for selected residual current waveforms
- Stanisław Czapp
2010 Pełny tekst Elektronika Ir Elektrotechnika
Zgodnie z normami międzynarodowymi, w instalacjach o zwiększonym ryzyku porażenia prądem elektrycznym należy stosować wyłączniki różnicowoprądowe wysokoczułe. Dla zapewnienia skutecznej ochrony przeciwporażeniowej zainstalowany wyłącznik różnicowoprądowy powinien prawidłowo wykrywać określony kształt prądu różnicowego. W artykule przedstawiono charakterystyki działania wyłączników różnicowoprądowych przy wybranych przebiegach odkształconego prądu różnicowego. Zauważono, że w zależności od kształtu prądu różnicowego prąd zadziałania tego samego wyłącznika różnicowoprądowego możne się znacznie zmieniać. Przy niektórych kształtach prądu różnicowego wyłączniki różnicowoprądowe mogą tracić swoje własności ochronne
Comparison of s-factor according to SOLAS and SEM for ro-pax vessels
- Maciej Pawłowski
2010
Pokazano różnice pomiędzy mnożnikami s dla promów pasażerskich, obliczonych wg konwencji SOLAS oraz metody statycznej równoważności (SEM). Obliczenia wykonane dla promu ''Polonia'' i statku prostopadłościennego wskazują na cztery wnioski. 1) W wypadku małej stateczności, mnożniki s wg SOLAS są zdecydowanie mniejsze od s wg SEM, 2) im mniejsza stateczność, tym większe różnice między nimi, 3) konwencja SOLAS niedoszacowuje rzeczywiste bezpieczeństwo statku, 4) stopień niedoszacowania wzrasta z wielkością statku.
Comparison of target strength (TS) distributions obtained by means of the use of direct and indirect techniques in sea cages
- Alejandro Cebrecos
- Ester Soliveres
- Victor Espinosa
- Marek Moszyński
2010
The aim of this study is to verify the reliability of a processing application developed for the indirect measurement of target strength (TS), with a view to the integration into a single-beam system for its utilization in fish farms. Dorsal and ventral measurements are carried out for gilt-head sea-bream (Spams Aurata) for 5 size classes using a split-beam EK60 echosounder and single-beam data obtained from one of the channels from the echosounder. Data measured using single-beam system lacks information about the relative position of (he target on the transducer's beam, making it necessary to use inverse techniques to eliminate the dependence of TS with the beam pattern of the transducer. Among the various existing techniques, the adaptive maximization, expectation and smoothing method is one that achieves results similar to those obtained using direct methods, implemented in split-beam systems. Firstly, the comparison is made between uncompensated target strength (TSu) distributions from EK60 echosounder regardless of the phase information, checking the proper functioning of the first part of processing application. Secondly, comparing TS distribution from the analysis made with the single-beam data with that obtained using the split-beam echo-sounder EK60, designed for direct TS estimation, with the purpose of assessing the reliability of a low-cost system for indirect TS estimation in sea cages.
Composite materials for Solid Oxide Fuel Cells - various ways of preparation and application
- Beata Bochentyn
2010
Wykonano przeglad mozliwosci zastosowania materialow kompozytowych w wysokotemperaturowych tlenkowych ogniwach paliwowych oraz scharakeryzowano najbardziej popularne metody wytwarzania i nakladania tego typu materialow.
Composition of data visualizations by sub-bottom profiler and multibeam echosounder in Matlab
- Grażyna Grelowska
- Eugeniusz Kozaczka
- Krystian Buszman
2010 Pełny tekst HYDROACOUSTICS
This paper contains description of procedure, which was elaborated in a numerical computing environment Matlab. The result of these procedures is a graphical composition of images obtained from two different hydroacoustic devices. It enables to compare different types of visualizations for the same geographical position and simultaneous work with graphical representation of all data types.
Computational algorithm for the analysis of mechatronic systems with distributed parameter elements
- Cezary Orlikowski
- Rafał Hein
- Rafał Cyran
2010
The paper presents a systematic computational package for analysis of complex systems composed of multiple lumped and distributed parameter subsystems. The algorithm is based on the transfer function method (DTFM). With this algorithm, a bond graph technique for the modelling is developed to simplify computations. Analysis of different systems requires only changing the inputs data in the form of the bond graph diagram
Computational intelligence methods in production management
- Ludmiła Zawadzka
- Krzysztof Oliński
2010
This chapter presents a survey of selected computational intelligence methods used in production management. This group of methods includes, among others, approaches based on the artificial neural networks, the evolutionary algorithms, the fuzzy logic systems and the particle swarm optimization mechanisms. From the abovementioned methods particularly noteworthy are the evolutionary and the particle swarm algorithms, which are successfully used in determination of (sub)optimal solutions of the optimization problems. Additionally, a multicriteria evaluation of a given schedule can be efficiently supported by applying the artificial neural network relying on expert knowledge.
Computational method for determining the static stiffness of the saw blade
- Karol Duchnicz
- Roman Wasielewski
2010 Annals of WULS, Forestry and Wood Technology
W artykule opisano sposób modelowania i obliczeń odkształceń i naprężeń pił tarczowych o złożonej geometrii korpusu z wykorzystaniem komputerowych programów wspomagających projektowania.
Computer animation system based on rough sets and fuzzy logic
- Piotr Szczuko
2010 LECTURE NOTES IN COMPUTER SCIENCE
A fuzzy logic inference system was created, based on the analysis of animated motion features. The objective of the system is to facilitate the creation of high quality animation by analyzing personalized styles contained in numerous animations. Sequences portraying a virtual character acting with a differentiating personalized style (natural or exaggerated) and various levels of fluidity were prepared and subjectively evaluated. Knowledge gathered in subjective evaluation tests was processed utilizing variable precision rough set (VPRS) approach for defining non-ambiguous inverse relation between subjective features of the result animation and objective parameters of the animated motion. Once the mapping is known then the user can define own requirements on animation, and the input motion is processed accordingly to produce the desired result. The paper focuses on employing variable precision rough set methodology for selection of representative parameter values.
Concentration in ICTs sector - cross country analysis
- Ewa Lechman
2010
In the chapter below, the author present inequalities in sector of new information and communication technologies. Having in mind inequalities we can also discuss concentration issues, and the concentration itself is a problem to which the author refers on first place. The paper is organized as following: first basic measures of concentration are defined, after we can read a discussion referring to concentration in ICTs sector when R&D expenditures are considered. Consequently the author analyzes basic concentration where use and application of ICTs goods and services are taken into account. To analyze the inequalities and concentration, traditional measures are applied, like: Gini coefficient, Hirschman-Herfindahl Index, andConcentration Ratio.Rozdział w monografii jest analizą stopnia koncentracji sektorów ICTs na świecie. Autor szacuje wartości indeksów Gini oraz HHI - indeksu koncentracji, dla najważniejszych sektorów ICTs w różnych krajach świara. Tekst stanowi dobrą baze do porównonań międzynarodowych dla oceny stopnia koncetracji przemysłu ICTs w wybranych krajach.