2014 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2014

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Raport z badań rury króćca N1 z reaktora 150-R1 Grupa LOTOS S.A
- Jerzy Łabanowski
- Krzysztof Krzysztofowicz
2014
Przedmiotem pracy było przeprowadzenie badań materiałowych rury króćca fi 367,6 mm z reaktora 150. Celem badań było ustalenie stanu materiału po eksploatacji
Rating mathematical models for first-pass of tracer in pCT lung studies
- Maciej Browarczyk
- Seweryn Lipiński
2014
This paper presents a comparison of model based on the Gauss function and the most commonly used Gamma-variate model in perfusion computed tomography (pCT) lung studies. It also verifies whether used model affects value of blood volume parameter. Three mean concentration-time curves were created from actual pCT measurements: arterial input function, blood vessels in lungs and lung parenchyma. On the basis of these mean curves we simulated 1000 concentration-time curves for each type of tissue. We used the Akaike information criterion to evaluate the models. Neither of the compared models showed a clear advantage over the other. The Gauss function showed ability to robust fit to datasets and there is no need to determine experimentally the arrival time. The main conclusion is that the Gauss function can be used as alternative to Gamma-variate function in modelling flow of tracer in lungs pCT.
Raz jeszcze o obciążeniu hydrodynamicznym falochronu pionowościennego falą stojącą
- Waldemar Magda
2014 Pełny tekst Inżynieria Morska i Geotechnika
Przedstawienie istniejących modeli matematycznych opisujących rozkłady ciśnienia hydrodynamicznego na falochron pionowościenny w wyniku oddziaływania fali stojącej. Analiza nieciągłości ciśnienia. Jakościowe porównanie metod obliczeniowych dla wybranych warunków wodno-falowych.
Reactivity of Diimido Complexes of Molybdenum and Tungsten towards Lithium Derivatives of Diphosphanes and Triphosphanes
- Rafał Grubba
- Aleksandra Wiśniewska
- Łukasz Ponikiewski
- Maria Caporali
- Maurizio Peruzzini
- Jerzy Pikies
2014 EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
The reaction of R2P–P(SiMe3)Li (R = tBu, iPr) with the diimido molybdenum complex [(ArN)2MoCl2·dme] (Ar = 2,6-iPr2C6H3; dme = 1,2-dimethoxyethane) yielded the side-oncoordinated phosphanylphosphinidene anionic complexes [(2,6-iPr2C6H3N)2Mo(Cl)(η2-P=PR2)]– (7Mo, 8Mo). The thermal decomposition of [(2,6-iPr2C6H3N)2M(Cl)(η2-P=PR2)]–[M = Mo (7Mo), W (8W)] to [(2,6-iPr2C6H3N)2M(Cl)(1,2-η-tBu2P=P–PtBu2)] [M = Mo (3Mo), W (3W)] was investigated by 31P{1H} NMR spectroscopy. The reactions of [(ArN)2MCl2·dme] (Ar = 2,6-iPr2C6H3; M = Mo, W) with tBu2P–P(Li)–PtBu2 gave molybdenum and tungsten complexes[(2,6-iPr2C6H3N)2-M(Cl)(1,2-η-tBu2P=P–PtBu2)] (3Mo, 3W) bearing an unusual triphosphorus ligand. The solid-state structures of [(2,6-iPr2C6H3N)2Mo(Cl)(η2-P=PtBu2)]– (7Mo), [(2,6-iPr2C6H3N)2-Mo(Cl)(η2-P=PiPr2)]– (8Mo), [(2,6-iPr2C6H3N)2Mo(Cl)(1,2-η-tBu2P=P–PtBu2)] (3Mo) and [(2,6-iPr2C6H3N)2W(Cl)(1,2-η-tBu2P=P–PtBu2)] (3W) were established by single-crystal Xray diffraction analysis.
REALIZACJA APLIKACJI SCHEDULER DLA STEROWANIA SIECIĄ TRANSPORTOWĄ
- Marcin Czajkowski
- Artur Gorczyca
- Sylwester Kaczmarek
- Krzysztof Szałajda
- Paweł Kaczmarek
2014 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
W artykule przedstawiono wykorzystanie koncepcji SDN z protokołem OpenFlow do sterowania siecią transportową z komutacją pakietów. W tym celu zrealizowana została aplikacja sterująca połączeniami w sieci telekomunikacyjnej. Podstawą jej działania jest planowany przez administratora sieci harmonogram połączeń, zawierający wszystkie niezbędne parametry konieczne dla przeprowadzenia sterowania.
REALIZACJA INTERFEJSU CTI W SOFTSWITCHACH
- Maciej Brzozowski
- Sylwester Kaczmarek
- Piotr Czabański
2014 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
W artykule przedstawiono problem zastosowania i realizacji interfejsów CTI w architekturze softswitcha. Dokonano analizy, pod kątem funkcjonalności, dwóch standardów CTI: CSTA oraz Parlay/OSA. Następnie wykonano model softswitcha z interfejsem CTI w standardzie CSTA w oparciu o projekt FreeSWITCH, na którym to modelu przeprowadzono testy i badania.
Realizacja przetwornika obrazu CMOS z wbudowaną konwersją A/C i cyfrowym układem CDS
- Jacek Jakusz
- Miron Kłosowski
- Waldemar Jendernalik
2014
W artykule przedstawiono realizację w technologii CMOS 180 nm przetwornika obrazu z wbudowaną konwersją analogowo-cyfrową oraz z funkcją cyfrowej redukcji szumu. Przedstawiona realizacja przetwornika obrazu różni się od znanych z literatury rozwiązań tym, że układ redukcji szumu CDS (Correlated Double Sampling) umieszczono w każdym pikselu obrazu. Dzięki tej modyfikacji możliwe jest zastąpienie migawki szczelinowej przez migawkę globalną. Jest to niezbędne w zastosowaniach wymagających rejestracji obrazów szybkozmiennych oraz w scalonych sensorach wizyjnych z wbudowanym w pełni równoległym przetwarzaniem obrazów.
Realizacja zmiany procesu planowania i sterowania produkcją – aspekty metodyczne
- Jolanta Łopatowska
2014 MARKETING I RYNEK
Konieczność zapewnienia sprawnej i skutecznej realizacji podstawowego procesu w organizacjach jakim jest proces produkcji wyrobów i usług, wymaga odpowiedniej adaptacji procesu planowania i sterowania produkcją do dynamicznych zmian otoczenia. Dla zagwarantowania efektywnego przebiegu procesu zmiany niezbędne jest nadanie mu właściwych ram i jego systemowe ujęcie. W artykule scharakteryzowano zakres działań i obszary zmian procesu planowania i sterowania produkcją. Zaprezentowano również usystematyzowane podejście do zmiany w obszarze procesu planowania i sterowania produkcją, co pozwoli właściwie ukierunkować i przeprowadzić proces zmian.
Real-time simulator of agricultural biogas plant
- Tomasz Barnert
- Emilian Piesik
- Marcin Śliwiński
2014 COMPUTERS AND ELECTRONICS IN AGRICULTURE
This article presents a real-time simulator of an agricultural biogas plant. The project contains biogas and biomass circuits simulation, as well as heating circuit simulation with a complete control system and visualization interface of the whole process. The software tool used to simulate the plant work is CFD (Computational Fluid Dynamics), which enables a user to create and test simulation objects based on fundamental physical laws related to fluid circuits and flows. The research work was concentrated on building simulation object reflecting real plant dynamics in the most precise way that can be achieved with the provided simulation tools. Presented simulation creates a possibility to minimize dangerous and undesirable situations on a real plant by manipulating of control parameters and observing simulated object reaction. The simulation results enable to optimize biogas production and operation costs. The simulator is intended to be an operator staff training material and can increase the operators’ reliability during plant’s operation. It is an important aspect in biogas plant risk management and it may reduce the requirements for safety instrumented system as well as the cost of their implementation.
Reasoning with Projection in Multimodular Description Logics Knowledge Bases
- Krzysztof Goczyła
- Aleksander Waloszek
- Wojciech Waloszek
2014 Communications in Computer and Information Science
We present an approach to reasoning with projection, i.e. reasoning in which it is possible to focus on a selected part of knowledge (by neglecting some non-interesting fragments). Projection is most useful for modular knowledge bases in which only parts of knowledge have to be exchanged or imported to other modules. In this paper we present an optimized method of reasoning over results of projection. The tests indicate that the method can drastically reduce the time of inferencing, enabling our reasoner to efficiently work with modular knowledge bases embracing several dozens of modules, even in the presence of cyclic interrelationships between them.
Re:Brick, czyli budowanie z małych elementów
- Bartosz Macikowski
2014 Zawód: Architekt
Artukuł opisuje problematykę aktywizowania działań łaczacych różne podmioty (studenci architektury i innych kierunków, praktykujący architekci, organizacje społeczne, administracja) mających przyczynić się podniesienia walorów architektonicznych i standardu zamieszkiwania w historycznych dzielnicach Gdańska (Dolne Miasto, Nowy Port, Biskupia Górka, Dolny Wrzeszcz).
Receiver-side fingerprinting method based on quaternion sandwich product
- Bartosz Czaplewski
- Roman Rykaczewski
2014 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
In this paper a new receiver-side fingerprinting method for color images is proposed. The proposed method belongs to the group of Joint Fingerprinting and Decryption (JFD) methods. Each component of the color image is represented as a point in 3D space, which is formed by 3 color channels. Encryption and fingerprinting can be interpreted as rotation, scaling and translation of these points. Calculations are performed using quaternion algebra. The experimental results show that the proposed method is robust against collusion attacks.
Reclaiming ground tire rubber at low temperatures: benefits and limitations
- Krzysztof Formela
- Magdalena Formela
- Józef Haponiuk
2014
Lower extrusion temperatures during rubber reclamation lead to a reduction in toxic degradation products and improve the mechanical properties of vulcanizates, at the expense of reduced processability.
Recognition of input items to the logistic operations in accommodation services
- Grzegorz Zieliński
- Martyna Kostrzewa
2014 Logistyka
In this study the authors set themselves the aim to analyze the elements of the entrance to the accommodation services in terms of logistics. Therefore, providers of this type of services were examined. This allowed to carry out analyses also with including the variety of accommodation services
Recycling of Photovoltaic Solar Cells and Modules - Te State - Of - Art
- Ewa Klugmann-Radziemska
2014
In comparison to other energy producing techniques, photovoltaics (PV) is one of the most promising options: no emission of any matter into the environment during operation; extremely long operation period (estimated average: 25 years), minimum maintenance, robust technique, aesthetic aspects. The use of photovoltaics is rapidly increasing, and the respective market is developing accordingly. Although PV manufacturing equipment is now excluded from the scope of RoHS, according to the Kyoto Protocol and the EU Directives WEEE and RoHS the use of hazardous substances in electric/electronic devices has to be reduced stepwise to approximately zero level. Furthermore, a total recycling of nearly all materials involved is aimed. Thus, major attention is directed to avoidance of environmental pollution through combustion or landfill, to regain valuable material, to promote the development and use of renewable energy sources. As the lifetime of PV cells themselves is much longer than that of PV modules and the manufacturing process of cells requires much energy consumption, the reuse of base material of the cells is economically justified. The aim of this work was to develop and evaluate existing methods of PV cells and modules recycling. The article discusses the main outcomes and analyses the significance of recycling in relation to the environmental profile of the production and total life cycle of photovoltaic cells and modules.
Recykling opakowań ze szkła, aluminium i PET
- Paweł Wawrzyniak
2014 OPAKOWANIE
W artykule porównano możliwość i korzyści wynikające z recyklingu pojemników typu puszka aluminiowa, butelka szklana i butelka PET. Ocenę przedstawiono na podstawie zebranych danych literaturowych.
Red Algae – An Alternative Source of Carbon Material for Energy Storage Application
- Andrzej Nowak
- Anna Lisowska-Oleksiak
2014 Pełny tekst International Journal of Electrochemical Science
New electrode material obtained by pyrolysis of aquatic biomass macro (red algae) soaked with glucose solution has been characterized by SEM, EDX and Raman spectroscopy. Graphitized carbon was identified by Raman spectroscopy. Galvanostatic cyclic polarization of the materials in contact with 1M LiPF6 electrolyte in EC:DMC (1:1 v/v) and Li as a counter electrode was performed. Specific capacity of the novel material was enhanced in comparison with graphitic charge capacity. The best specific capacity was achieved for the sample with a carbon cluster size La of 39 Å and was equal to 578 mAh/g with capacity fading about 9 % for C/20 –rate.
Redevelopment of Gdynia waterfront - students' imagination
- Aleksandra Sas-Bojarska
2014
The article presents the ideas of Gdynia waterfront redevelopment, proposed by students of the Faculty of Architecture, as diploma works. Gdynia is often a subject of diploma works - as a city of many needs, opportunities and challenges. It gives students the wide range of possibilities to create attractive, modern and unique development – concerning different functions, forms and meanings. Students works have been presented regarding contemporary planning circumstances and needs of Gdynia.
Reducing Monitoring Costs in Industrially Contaminated Rivers: Cluster and Regression Analysis Approach
- Marek Ruman
- Ewa Olkowska
- Krystyna Kozioł
- Damian Absalon
- Magdalena Matysik
- Żaneta Polkowska
2014 JOURNAL OF ENVIRONMENTAL QUALITY
Monitoring contamination in river water is an expensive procedure, particularly for developing countries where pollution is a significant problem. This study was conducted to provide a pollution monitoring strategy that reduces the cost of laboratory analysis. The new monitoring strategy was designed as a result of cluster and regression analysis on field data collected from an industrially influenced river. Pollution sources in the study site were coal mining, metallurgy, chemical industry, and metropolitan sewage. This river resembles those in other areas of the world, including developing countries where environmental monitoring is financially constrained. Data were collected on variability of contaminant concentrations during four seasons at the same points on tributaries of the river. The variables described in the study are pH, electrical conductivity, inorganic ions, trace elements, and selected organic pollutants. These variables were divided into groups using cluster analysis. These groups were then tested using regression models to identify how the behavior of one variable changes in relation to another. It was found that up to 86.8% of variability of one parameter could be determined by another in the dataset. We adopted 60, 65, and 70% determination levels (R2) for accepting a regression model. As a result, monitoring could be reduced by 15 (60% level) and 10 variables (65 and 70%) out of 43, which comprises 35 and 23% of the monitored variable total. Cost reduction would be most effective if trace elements or organic pollutants were excluded from monitoring because these are the constituents most expensive to analyze.
Reducing of energy consumption in public transport - results of experimental exploitation of super capacitor energy bank in Gdynia trolleybus system
- Mikołaj Bartłomiejczyk
- Slobodan Mirchevski
2014
Paper presents the result of test exploitation supercapacitor energy bank in Gdynia trolleybus system. In the first part of the article the basics of the regenerative breaking are presented and the construction and control strategy of the supercapacitor bank are described. The area of research and method of measurement are explained. In the second part of paper the results of tests and measurements are described. Emphasis was placed on the comparison of different methods of using regenerative braking energy. In the last part of the article conclusions are presented.