2018 - Repozytorium publikacji - Politechnika Gdańska

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Unusual Influence of Fluorinated Anions on the Stretching Vibrations of Liquid Water
- Maciej Śmiechowski
2018 Pełny tekst JOURNAL OF PHYSICAL CHEMISTRY B
Infrared (IR) spectroscopy is a commonly used and invaluable tool in the studies of solvation phenomena in aqueous solutions. Concurrently, ab initio molecular dynamics (AIMD) simulations deliver the solvation shell picture at a molecular detail level and allow for a consistent decomposition of the theoretical IR spectrum into underlying spatial correlations. Here, we demonstrate how the novel spectral decomposition techniques can extract important information from the computed IR spectra of aqueous solutions of BF4− and PF6−, interesting weakly coordinating anions that have been known for a long time to alter the IR spectrum of water in an unusual manner. The distance-dependent spectra of both ions are analyzed using the spectral similarity method that provides a quantitative picture of both the spectrum of the solute-affected solvent and the number of solvent molecules thus altered. We find, in accordance with previous experiments, a considerable blue shift of the νOH stretching band of liquid water by 264 cm−1 for BF4− and 306 cm−1 for PF6− , with the affected numbers being 3.7 and 4.2, respectively. Considering also the additional information on solute−solvent dipolar couplings delivered by radially and spatially resolved IR spectra, the computational IR spectroscopy based on AIMD simulations is shown to be a viable predictive tool with strong interpretative power.
Up-conversion white emission and other luminescence properties of a YAG:Yb2O3·Tm2O3·Ho2O3@SiO2 glass-nanocomposite
- Andrzej M. Kłonkowski
- Benedykt Kukliński
- Mariusz Kubus
- Jacek Ryl
- Karol Szczodrowski
- Dorota Wileńska
- H. Jurgen Meyer
2018 Pełny tekst RSC Advances
We report on a glass-nanocomposite material consisting of yttrium aluminum garnet (Y3Al5O12, YAG) nanocrystals co-doped with Yb3+, Tm3+ and Ho3+ ions as well as entrapped into a SiO2 xerogel. This 94YAG·5Yb2O3·0.8Tm2O3·0.2Ho2O3@SiO2 (abbr. YAG:YbTmHo@SiO2) nanocomposite material has been prepared by sol–gel procedure. Its structure and morphology has been characterized by means of X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques as well as energy dispersive X-ray (EDX), X-ray photoelectron (XPS) and luminescence spectroscopies. The luminescent glass-nanocomposite exhibited an up-conversion effect under λexc = 980 nm and emission when excited under 355 nm in steady-state conditions. Then time-resolved luminescence emission was observed, when the sample was excited at 290 and 355 nm by a pulse laser. Average decay times for the SiO2 matrix and for some transitions of the Tm3+ and Ho3+ dopants present in the YAG:YbTmHo@SiO2 material have been evaluated. The luminescent nanocomposite when excited under 290 or 355 nm wavelengths in both conditions emits blue light. However, the nanocomposite is promising as a single-source white-light phosphor owing to its up-conversion luminescence under 980 nm excitation. Such optical features make the studied material an alternative phosphor.
Updating the Coupling Algorithm between HYDRUS and MODFLOW in the HYDRUS Package for MODFLOW
- Sahila Beegum
- Jiří Šimůnek
- Adam Szymkiewicz
- K Sudheer
- Indumathi Nambi
2018 Pełny tekst VADOSE ZONE JOURNAL
The HYDRUS-based flow package for MODFLOW (the HPM or the HYDRUS package) is an existing unsaturated zone flow package for MODFLOW. In MODFLOW with the HPM, the groundwater modeling domain is discretized into regular grids that can be combined into multiple zones based on similarities in soil hydrology, topographical characteristics, and the depth to the groundwater. Each of these zones is assigned one unsaturated soil profile (the HPM profile). In this model, after every MODFLOW time step, the flux at the bottom of the HPM profile is given as an input recharge flux to MODFLOW. MODFLOW simulates groundwater flow, and the water table depth at the end of the MODFLOW time step is assigned as the bottom boundary condition in the HPM profile. The current coupling algorithm assumes that the groundwater table in the HPM profile remains constant throughout the entire MODFLOW time step. This results in unrealistic sudden inflow and/or outflow fluxes at the bottom of the HPM profile after every time step. The objective of this study was to develop a methodology to eliminate the error in the determination of the recharge flux at the bottom of the HPM profile. This was achieved by updating or modifying the pressure head profile in the HPM profile after every MODFLOW time step. The effectiveness and the applicability of the new coupling algorithm were evaluated using different case studies. The new coupling algorithm is effective in eliminating unrealistic sudden variations in the bottom flux in the HPM profiles.
Urban Freight Transport Demand Modelling and Data Availability Constraints
- Daniel Kaszubowski
2018
The paper provides a review of urban freight transport demand modelling approaches confronted with constrains regarding adequate data provision from a perspective of the local authorities. Demand estimation models has been selected as a reference because they are the most representative in terms of inclusion of urban freight indicators which can be transformed into a decision-support tool for evaluation of freight measures. The main concern is to find a balance between an effort required to create a reliable urban freight analysis framework and transport policy’s objectives. Delivery-based models has been considered as the most promising in terms of possible results and ability to represent different aspects of urban supply chains in a coherent way. As they use a vehicle movement as a descriptor, the results can be presented in measurable way in terms of general transport planning framework.
Urban Prototyping in CAVE Cooperation Between the Academy of Fine Arts in Gdansk and the Gdansk University of Technology
- Iwona Dzierżko-Bukal
- Jacek Lebiedź
2018
The paper describes results of cooperation between the Passive Architecture Laboratory at the Academy of Fine Arts in Gdańsk and the Immersive 3D Visualization Lab at the Gdańsk University of Technology. The authors as the design supervisors (respectively for a team of architects and a team of IT specialists) present advantages and disadvantages of urban design with use of virtual reality.
Urban space recovery. Landscape-beneficial solutions in new estates built in post-industrial and post-military areas in Bristol, Poznań and Gdańsk
- Elżbieta Raszeja
- Joanna Badach
2018 Pełny tekst Miscellanea Geographica : Regional Studies on Development
The limitation of territorial expansion and the implementation of the idea of a compact city are generally accepted paradigms of spatial development of contemporary cities. In consequence, actions are taken to improve the quality of city landscape and revitalise vacant areas. This study approaches the process of city regeneration as transformation and supplementation of the existing urban structure as well as creation of multifunctional, structurally, socially and ecologically sustainable spaces. The article presents the problem of creation of new-inner city residential areas. The study was conducted on three housing estates located in post-industrial and post-military areas: Harbourside Development in Bristol (UK), City Park and Ułańskie Estate in Poznań (Poland) and Browar Gdański in Gdańsk (Poland). The article includes analyses of relations between the estates and their surroundings, spatial structure parameters and architectural, urban and scenic characteristics. It includes assessment of the legibility, consistency, diversity and quality of the urban landscape.
Urbanistyka i architektura dawnego garnizonu w Gdańsku Strzyży
- Aleksander Piwek
2018
Przedstawione zostały dzieje budowy i rozwoju urbanistycznego dawnych koszar w Gdańsku-Strzyży. Scharakteryzowano także architekturę poszczególnych obiektów z podaniem ich pierwotnych jak i późniejszych funkcji. Opisano szczegółowo d. koszary jednostki taborów, I. i 2. Regimentu Huzarów Przybocznych, późniejsze uzupełnienia zespołu koszar, zabudowę składu wozowni, także zabudowę wojskową pozostającą poza obrębem koszar.
Urine headspace analysis in medical diagnostics
- Kaja Kalinowska
- Jacek Namieśnik
2018 Pełny tekst World Scientific News
The analysis of the volatile organic compounds in the bodily fluids such as urine may provide useful information on the patients’ general health. The potential application of urine headspace analysis could facilitate the diagnostics of various diseases such as metabolic disorders, urinary tract diseases and gastrointestinal conditions. Described in this paper are the currently available techniques of urine sample analysis as well as their different application in medical diagnostics.
Usability Techniques Possible to Use in Diagnostic Tools Interface Improvement
- Ryszard Bielski
- Karol Kufel
- Marcin Bielski
- Jantanata Hendra
- Cezary Graul
2018
The development of diagnostic tools has caused a rapid increase in the amount of information generated and presented, necessitating the use of computer displays as an interface to data presentation and the use of modern diagnostic tools. The paper presents methods for testing usability that can be used in designing and improving the quality of interfaces of modern diagnostic tools that use communication through graphical user interfaces.
Use of Ginger Nanofibers for the Preparation of Cellulose Nanocomposites and Their Antimicrobial Activities
- Joby Jacob
- Józef Haponiuk
- Sabu Thomas
- Gregary Peter
- Sreeraj Gopi
2018 Pełny tekst Fibers
Here, we report, for the first time, the isolation of ginger nanofibers (GNF) from ginger rhizomes spent by acid hydrolysis and followed by high-pressure homogenization. Scanning electron microscopy was utilized to identify the surface morphology of the GNF and the widths ranged between 130 to 200 nm. Structural analysis of GNF was identified by Fourier transform infrared spectroscopy, Differential scanning calorimetry, and X-ray diffraction methods. This GNF was used to make natural nanocomposites by the solvent-casting method reinforcement, using potato starch (PS) and tapioca starch (TS), and was characterized through various methods. The antibacterial test showed that the bionanocomposites with 5% GNF exhibited good antibacterial activity against Bacillus cereus, Escherichia coli, Staphylococcus aureus, and Salmonella typhimurium, due to the addition of GNF in the biopolymer matrices
Use of radiography images and gray level co-occurrence matrix to investigate gravitational granular flow
- Selam Waktola
- Krzysztof Grudzień
- Maciej Niedostatkiewicz
- Laurent Babout
2018 Pełny tekst MATEC Web of Conferences
The paper presents analysis of granular gravitational flow based on radiography images processing. The investigations were conducted for silo model geometry with concentric/eccentric discharging modes. The continuous X-ray radiography scans of granular material distribution, acquired during flow, were obtained by means of an especially designed model silo with rectangular bin and different settings of hopper angles. Image processing involved texture analysis methods, the Gray-Level Co-Occurrence Matrix (GLCM). The texture analysis of radiography images provides information about changes of granular porosity in different silo zones during silo discharging process. This technique allows to divide the silo space into a number homogenous regions with similar porosity level. The proposed methodology was applied to analyse the flow in silo model with various hopper angles
Usefulness of Keystroke Dynamics Features in User Authentication and Emotion Recognition
- Agata Kołakowska
2018 Advances in Intelligent Systems and Computing
The study presented in the article focuses on keystroke dynamics analysis applied to recognize emotional states and to authenticate users. An overview of some studies and applications in these areas is presented. Then, an experiment is described, i.e. the way of collecting data, extracting features, training classifiers and finding out the most appropriate feature subsets. The results show that it is difficult to indicate a universal sets of features for the defined tasks and the best idea is to individually adapt models to users.
Using Different Information Channels for Affect-Aware Video Games - A Case Study
- Mariusz Szwoch
- Wioleta Szwoch
2018
This paper presents the problem of creating affect-aware video games that use different information channels, such as image, video, physiological signals, input devices, and player’s behaviour, for emotion recognition. Presented case studies of three affect-aware games show certain conditions and limitations for using specific signals to recognize emotions and lead to interesting conclusions.
Using Wearable Electronics to Estimate Usefulness of Heart Rate Variability for Bathing Person Identif Cation
- Tomasz Abramowicz
- Artur Polinski
- Adam Bujnowski
- Jerzy Wtorek
2018
In this paper the possibility of person identification based on biosignal is investigated. The work focus on the analysis of the changes in intervals between successive R-waves of electrocardiogram (ECG) recorded by wearable electronics in form of a necklaces. The main idea behind this project is to find efficient tool which may prevent sudden consciousness loss episodes or even sudden death episodes related to rapid temperature changes. Proposed method relays on the estimation of the RR interval changes in time with three approximation functions. Then, the identification of a person is performed based on the parameters of the utilized estimation functions.
Usługi ośrodków podregionalnych w Polsce
- Jacek Sołtys
- Sławomir Dorocki
2018 Pełny tekst Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Ośrodki podregionalne definiowane są jako miasta, w których skoncentrowane są takie usługi, które w Polsce mogą być w kilku miastach województwa, ale nie w każdym mieście powiatowym. Usługi zawsze miały tendencję do koncentracji, tworząc ośrodki różnych poziomów w hierarchicznej sieci osadniczej. Celem prezentowanych badań było: (1) określenie usług typowych dla poziomu podregionalnego; (2) rozpoznanie koncentracji tych usług, tworzonych przez nie ośrodków i ich rozmieszczenia oraz (3) ocena, w jakim stopniu występują prawidłowości hierarchicznego modelu lokalizacji usług na poziomie podregionalnym w Polsce. Takie usługi w Polsce, poza obszarami metropolitalnymi i miastami wojewódzkimi były przedmiotem badań. Za usługi typowe, definiujące ośrodki podregionalne, uznano: sądy okręgowe, szpitale wielospecjalistyczne, wyższe uczelnie i kina multipleksowe. Zbadano metodą klasyfikacji zróżnicowanie ośrodków, a poprzez analizę kartograficzną – ich rozmieszczenie. Badania, będące kontynuacją badań z r. 2015, uwzględniające aktualniejsze dane i szerszy zakres usług, wykazały 23 ośrodki podregionalne pełne i 47 niepełnych, w których zestawy usług tworzą różne kombinacje, z dwoma dominującymi. Jako prawidłowość stwierdzono dużą koncentrację usług. Rozmieszczenie ośrodków jest nierównomierne, prawdopodobnie z powodu zróżnicowania gęstości zaludnienia.
Usterki na dachu płaskim budynku wielorodzinnego
- Maciej Niedostatkiewicz
2018 Architektura-Murator
Błędy projektowe ora zwykonawcze wpływają bezpośrednio na bezpieczeństwo konstrukcji i użytkowania obiektów budowlanych, także mieszkalnych. Usunięcie usterek i doprowadzenie budynków do właściwego stanu technicznego wymaga od właścicieli dużego zaangazowania finansowego. W przypadku nieprawidłowości występujących na stropodachach, w tym dachach płaskich, powoduje to również istotne utrudnienia i uciążliwości eksploatacyjne. Niektóre błędy popełnione podczas realizacji zastająi trzeba je zniwelować. W artykule na podstwie przykładowej realizacji dachu płaskiego zaprezentowane zostaną nieprawidłowości projektowe i wykonawcze.
Ustna opinia uzupełniająca dotycząca projektu budowlanego, wykonawczego i realizowanego procesu budowlanego obiektu Międzynarodowego Centrum Konferencyjnego w Katowicach (Sygn. akt II C 889/13/7)
- Dariusz Kowalski
2018
Na zapytanie sądu oraz zainteresowanych stron będących w sporze udzielano odpowiedzi na wątpliwości i wyjaśniano warunki i skutki czasowe, organizacyjne oraz finansowe dotyczące całego procesu inwestycyjnego obejmującego projektowanie i realizację robót budowlanych prowadzonych na obiekcie MCK w Katowicach.
Usuwanie tła w video nagraniach pochodzących z monitorowania basenu pływackiego
- Konrad Reiter
- Zdzisław Kowalczuk
2018 Pełny tekst Pomiary Automatyka Robotyka
Automatyczna obróbka obrazu w czasie rzeczywistym jest kluczowa dla wielu rozwiązań monitoringu wykorzystywanych m.in. w celach bezpieczeństwa. Często jednym z ważniejszych etapów obróbki jest oddzielenie tła od obiektów na pierwszym planie, tak aby wykluczyć wszystkie nieistotne informacje z obrazu. Celem niniejszej pracy jest podsumowanie doświadczenia zdobytego podczas śledzenia pływaków oraz pokazanie możliwości skutecznego automatycznego nadzoru wideo osób korzystających z basenu. Porównano skuteczność działania dwóch wybranych algorytmów (MOG i KNN) przy użyciu różnych odwzorowań kolorów oraz omówiono zalety i wady analizowanych metod.
Uszkodzenia wyprawy z tynku ciepłochronnego w następstwie błędów projektowych i wykonawczych
- Tomasz Majewski
- Maciej Niedostatkiewicz
2018 Przegląd Budowlany
W artykule opisano następstwa braku zachowania reżimu technologicznego podczas realizacji wyprawy z ciepłochronnego tynku perlitowego. Wskazano koncepcje rozwiązań majacych na celu usunięcie występujących usterek
Utilizing online collaborative games to facilitate Agile Software Development
- Adam Przybyłek
- Wojciech Kowalski
2018 Pełny tekst Annals of Computer Science and Information Systems
Effective collaboration and interaction among the development team and between the team and the customer as well as proactive attitude in initiating and implementing improvements play vital roles in the success of agile projects. The challenge is how to address these social aspects since neither the Agile Manifesto nor the Scrum Guide specify techniques that aid the human side of software development. To fill this gap, we developed a web portal which provides 8 collaborative games to be used in agile software development. The feedback received from a Scrum team, who leveraged the games in an industrial project conducted in OKE Poland, indicates that our approach improves participants’ communication, motivation, commitment, and creativity.