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Publications from the year 2016
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From grey to green
- Katarzyna Rembarz
- Heewan Shin
- Mrudhula Koshy
- Evelina Knyzelite
- Olivia O’connor
The article presents conceptual project made by students during Urban European Summer School “City on water” in Bremen 2015. The area of study was Hemelingen, Aller-Harbour, Bremen, Germany. The aim was to make a design of regeneration of the area. Students were free in choosing methods and ideas for their project.
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From polymer waste to potential main industrial products: Actual state of recycling and recovering
- Janusz Datta
- Patrycja Jutrzenka Trzebiatowska
lastics have become widely used materials in everyday life due to their special properties such as durability, easy processing, light-weight and low-cost of production. However, because of their stable and non-biodegradable nature, postconsumer plastics become an issue to the environment. The growing amounts of waste are generated, as plastic products are commonly used only once before disposal. The alternatives of practical techniques for solid waste management are: redesign, reprocessing and recycling. Even thus recycling is not the most profitable technique for the treatment of plastic waste it should be constantly developed. The recycling of plastic waste helps to conserve natural resources due to polymeric materials are made from oil and gas. There are four main recycling methods: reuse, mechanical recycling, chemical recycling and energy recovery. Mechanical recycling turns polymeric waste into new polymer products when energy recovery process releases the energy contained within plastics through combustion and chemical recycling converts waste polymers into feedstock for chemicals/monomers/fuels production. Nowadays chemical recycling of plastic waste is the most noteworthy of polymer recovery technique. This manuscript presents a literature review on chemical recycling methods of various polymers, such as polyethylene (LDPE or HDPE), polypropylene or mixture of this polymer waste, poly(ethylene terephthalate), polycarbonate, polyurethane etc. We described the effect of the reaction parameters on obtained products, used catalysts and agents and used equipment for specific methods of chemical recycling. In this way, the state of the art of the chemical recycling methods of several polymers is presented.
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From the Concept to Results: A Case Study on the Collection Development for the ODC–Opening Day Collection at Qatar National Library
- Henry Owino
- Katarzyna Helena Dudek
"A library collection should fit the mission for which it is created. The number of books it holds does not determine its worth." (E. J. Loveland, 2000) If so, how do we create a national library, and how do we build its collection from scratch without making many mistakes? Since 2012, when the plans for the new national library were announced, Qatar National Library (QNL) envisioned as carrying out its mission to "spread knowledge, nurture imagination, cultivate creativity, and preserve the nation’s heritage for future generations” through three functions: National library, university and research library, and a metropolitan public library. This presentation will focus on the 3 years’ experience of selection, acquisition, and processing of library materials, in a perspective of achieving the opening day collection. We would like to share a preliminary outcome of building a library collection in Arabic, English, and other languages in record time; facing challenges in negotiations (long-term vendors and single sources), logistics (building a library collection without a building), and business culture (visions, working style in a Middle East business culture/context). We will talk about our various acquisition methods (i.e., blanket and firm orders, donations, gifts and exchanges, spot purchases from book fairs, and personal contacts), highlighting both the challenges and the rewards. General statistics and timelines will be provided to elucidate the intended target and achievements to date. The systems used to support this mission are also highlighted with details enough but not to compromise aspects necessary for future significant milestone reports of QNL. It is expected that the QNL acquisitions program will more than meet its intended targets for the ODC. Attendees should come away with an understanding of the issues and the processes related to the acquisitions of international materials. In addition, we hope to generate a discussion with the audience about alternative experiences and processes in creating a library collection from the scratch.
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FTIR spectroscopic and thermogravimetric characterization of ground tyre rubber devulcanized by microwave treatment
- Xavier Colom
- Anwar Faliq
- Krzysztof Formela
- Javier Cañavate
In this work, the phenomena involved in the microwave devulcanization of ground tyre rubber (GTR) were investigated. Three types of GTR with different content of organic compounds (elastomers, plasticizers, etc.), carbon black and ash have been studied. The chemical structure of GTR before and after a microwave devulcanization process was analyzed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). Furthermore, the efficiency of the microwave devulcanization conducted at different treatment time was evaluated based on the values of crosslinking density and sol fraction content. FTIR spectroscopy results showed that devulcanization of GTR causes a decrease in carbon black with generation of CO2 due to its thermo oxidation, a decrease in the structural groups related to elastomeric components (mainly methylene and methine) and a breaking of Csingle bondS groups and Ssingle bondS bridges. The presented results indicate the strong correlation between the content of SiO2 in the GTR and the achieved degree of devulcanization. It was observed that GTRs with a high content of SiO2 are devulcanized more easily than the samples with low content of SiO2, which suggest that the presence of silica fillers improve microwave devulcanization efficiency.
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Functional delay fractional equations
- Tadeusz Jankowski
In this paper, we discuss functional delay fractional equations. A Banach fixed point theorem is applied to obtain the existence (uniqueness) theorem. We also discuss such problems when a delay argument has a form α(t) = αt, 0 < α < 1, by Rusing the method of successive approximations. Some existence results are also formulated in this case. An example illustrates the main result.
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Fundamenty palowe, obliczenia z zastosowaniem zasad Eurokodu 7 i doświadczeń krajowych
- Kazimierz Gwizdała
- Adam Krasiński
Przedstawiono zagadnienia obliczania fundamentów palowych w nawiązaniu do zaleceń Eurokodu 7. Zwrócono uwagę, że zgodnie z założeniami Eurokodu 7, projektant i inżynier ma swobodę w wyborze metod obliczeniowych.Przytoczono i zarekomendowano metody i propozycje miedzy innymi obliczania statycznego układów palowych, określania nośności pali, prognozowania osiadań fundamentów palowych oraz charakterystyk obciążenie-osiadanie pali pojedynczych i w grupie.
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Gains selection of non-proportional observers of an induction motor with dyadic methods
- Tadeusz Bialon
- Roman Niestroj
- Marian Pasko
- Arkadiusz Lewicki
The paper presents issues related to calculation of gains of non-proportional observers of magnetic fluxes of an induction motor. A transformation is discussed, based on dyadic matrices, that affords possibility of applying well-known methods used in single-output systems to observers of multi-output systems. The impact of dyadic transformation on possibility of poles placement of the observer is analyzed. Experimental results are shown, obtained for exemplary observers designed with discussed methods.
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Game with a Purpose for Mappings Verification
- Tomasz Maria Boiński
Mappings verification is a laborious task. The paper presents a Game with a Purpose based system for verification of automatically generated mappings. General description of idea standing behind the games with the purpose is given. Description of TGame system, a 2D platform mobile game with verification process included in the gameplay, is provided. Additional mechanisms for anti-cheating, increasing player’s motivation and gathering feedback are also presented. Example of the system usage for verification of mappings between WordNet synsets and Wikipedia articles is presented. The evaluation of proposed solution and future work is also described.
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Gas Detection Using Resistive Gas Sensors And Radial Basis Function Neural Networks
- Łukasz Lentka
- Janusz Smulko
- Oscar Gualdron
- Radu Ionescu
We present a use of Radial Basis Function (RBF) neural networks and Fluctuation Enhanced Sensing (FES) method in gas detection system utilizing a prototype resistive WO3 gas sensing layer with gold nanoparticles. We investigated accuracy of gas detection for three different preprocessing methods: no preprocessing, Principal Component Analysis (PCA) and wavelet transformation. Low frequency noise voltage observed in resistive gas sensor was treated as input data of preprocessing methods. The power spectral density was computed for two firstly enumerated methods to improve effectiveness of gas detection. The PCA method preserves the most informative part of power spectral density by reducing size of input data and gave slightly worse results. The best results secured wavelet transform. We have compared the reported results with our previous work about Least Squares Support Vector Machines (LS-SVM) algorithm. We conclude that the applied method is much simpler and faster than the previous one and secured similar gas detection accuracy.
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Gas sampling system for matrix of semiconductor gas sensors
- Grzegorz Jasiński
- Anna Strzelczyk
- Piotr Adam Kościński
Semiconductor gas sensors are popular commercial sensors applied in numerous gas detection systems. They are reliable, small, rugged and inexpensive. However, there are a few problem limiting the wider use of such sensors. Semiconductor gas sensor usually exhibits a low selectivity, low repeatability, drift of response, strong temperature and moisture influence on sensor properties. Sample flow rate is one of the parameters that influence sensors response what should be considered in the measurement system. This paper describes low cost module for controlling measured gas flow rate. The proposed equipment will be used as a component of electronic nose system employed for classifying and distinguishing different levels of contamination in air.
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Gas turbines – technological development and potential use in CAES systems
- Damian Jakowski
- Marek Dzida
This article briefly describes Compressed Air Energy Storage (CAES), focusing on the technological development of one of the key elements of such systems – the gas turbines. It presents the basic parameters and features of gas turbines, as well as turbine classes with example models. Main tendencies in the structural and technological development are discussed. Changes and trends on electric energy markets are becoming more and more dependent on sources with flexible operating characteristics, therefore, the advantages of gas turbines and the reasons for their development are listed as well
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Gazowy kocioł kogeneracyjny – badania prototypu
- Jan Wajs
- Dariusz Mikielewicz
- Małgorzata Woźnowska
W artykule zaprezentowano wyniki badań prototypowej parowej mikrosiłowni ORC zintegrowanej z kotłem gazowym. Jest to pierwsze w Polsce tego typu urządzenie w skali „domowej”, uhonorowane złotym medalem na targach Technicon Innowacje 2014. Pozwala realizować kogeneracyjną produkcję ciepła i energii elektrycznej w aspekcie pokrycia potrzeb indywidualnego gospodarstwa domowego. Domowy kocioł gazowy doposażony w układ realizujący obieg parowy z alkoholem etylowym jako czynnikiem roboczym zasługuje na miano kotła przyszłej generacji. Innowacyjność urządzenia wynika z integracji modułu ORC z konwencjonalnym kotłem gazowym, kompaktowości autorskich rozwiązań mikroturbiny parowej oraz parownika i skraplacza. W zamyśle twórców produkowana w mikrosiłowni energia elektryczna może być konsumowana w ramach potrzeb własnych użytkownika bądź sprzedawana do sieci elektroenergetycznej, dzięki czemu użytkownik instalacji stanie się prosumentem.
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Gdańsk w panoramie migracji w średniowieczu
- Jarosław Ślęzak
Gdańsk zajmował istotne miejsce w panoramie migracji w Średniowieczu. Migracje cechowały się znaczna dynamiką. Osadnictwu sprzyjały przywileje panujących - książąt gdańsko-pomorskich. Osadnictwo Lubeczan doprowadziło do przyjęcia wzorów samorządowych i lokacji miasta na prawie lubeckim.Istotne były związki z Hanzą. Pojawiło się ustawodawstwo wilkierzowe, regulujące nabycie obywatelstwa miejskiego.
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GDAŃSKA SZKOŁA JAKOŚCI - PRZYCZYNEK DO POMORSKIEJ I POLSKIEJ NAGRODY JAKOŚCI
- Piotr Grudowski
PRZESTAWIONO ZARYS DOROBKU GDAŃSKIEJ SZKOŁY JAKOŚCI
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Gdańskie porty jachtowe - próba diagnozy problemów i przedstawienia perspektyw rozwoju
- Katarzyna Rembarz
Pory jachtowe w Gdańsku są ważnym elementem infrastruktury terenów nadwodnych i miejscem rekreacji mieszkańców. Artykuł omawia działania władz miasta w zakresie planowania i realizacji nowych obiektów, analizuje gdańskie akweny wodne i aktualny stan zainwestowania oraz realne potrzeby gdańskiego środowiska żeglarskiego. Na koniec konfrontuje je, wskazując niewykorzystane potencjały i pożądane kierunki rozwoju.
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Gdinas vesturiska mantojuma politika "Latvijas Architektura"
- Renate Caupale
- Robert Hirsch
Artykuł dotyczy systemu ochrony zabytków architektury modernistycznej w Gdyni. Omówione są indywidulne zasady ochrony oraz finansowanie konserwacji ze środków publicznych.
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Gender, education and motivation of onwers of small firms and their growth
- Julita Wasilczuk
Almost every article on the growht of SMEs begins with noting the lack of a unified theory or a model of growth in thei group of companies, although the growth of small and medium sized enterprises has been the subject of research for many years and early theories about it appeared already before the Second World War. In the paper some conlusions about the relation between gender, education and motivation of owner and the small firms growth were drawn.
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General Mechanism of Osmolytes’ Influence on Protein Stability Irrespective of the Type of Osmolyte Cosolvent
- Aneta Panuszko
- Piotr Bruździak
- Emilia Kaczkowska
- Janusz Stangret
The stability of proteins in an aqueous solution can be modified by the presence of osmolytes. The hydration sphere of stabilizing osmolytes is strikingly similar to the enhanced hydration sphere of a protein. This similarity leads to an increase in the protein stability. Moreover, the hydration sphere of destabilizing osmolytes is significantly different. These solutes generate in their surroundings so-called “structurally different water”. The addition of such osmolytes causes “dissolution” of the specific protein hydration sphere and destabilizes its folded form. No relationship is seen between the stabilizing/destabilizing properties of osmolytes and their structure-making/-breaking influence on water. Furthermore, their accumulation at the protein surface or their exclusion does not determine the osmolytes’ effect on protein stability. An explanation to the osmolytes’ stabilizing/destabilizing influence originates in the similarity of water properties in osmolytes and protein solutions. The spectral infrared characteristic of water in an osmolyte solution allowed us to develop practical criteria for classifying solutes as stabilizing or destabilizing agents.