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Publications from the year 2018
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Sound quality metrics applied to road noise evaluation
- Karolina Marciniuk
- Bożena Kostek
Road noise monitoring systems typically measure sound levels in specific time periods. The more insightful approach suggests to measure also the nature of noise. Sound quality of sounds such as car noise can be objectively evaluated by several parameters. One of them is psychoacoustic annoyance, described by loudness, tone color, and the temporal structure of sound. In this paper the assessment of several sound quality parameters, such as: loudness of time-varying noise, sharpness, fluctuation strength, and roughness, as well some additional parameters borrowed from the Music Information Retrieval area are presented. Then a comparison between parameter values obtained by means of the professional measurement system and a tool working in the Matlab environment is performed. The conducted investigations are carried out using recorded samples of an individual vehicle 1930 J. Acoust. Soc. Am., Vol. 144, No. 3, Pt. 2, September 2018 ASA Fall 2018 Meeting/2018 Acoustics Week in Canada 1930 pass-by in close proximity of the road, organized as a database of road traffic noise recordings.
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Sources of Market Information, Its Quality and New Product Financial Performance
- Dariusz Dąbrowski
While we observe a growing interest in the role of market information in new product development (NPD), existing research has still largely ignored the quality of market information that is a crucial issue in the era of the information society. What does affect the quality of market information in new product development projects, and how does this quality influence the financial performance of new products? In this paper, we address these questions and hypothesize that sources of information (e.g. customers, competitors) influence the quality of market information, and this quality affects new product financial performance through market predictability as a mediator. We test these hypotheses using data of about 287 new product projects of medium-high and high technology firms from Poland. Our findings indicate that the key sources that influence market information quality are customers and competitors. More intensive collection of market information from these two sources, and especially from customers, will result in this information being of a higher quality. Surprisingly, gathering market information from other market entities (e.g. suppliers, distributors) has no effect on the quality of market information. We also find that an important consequence of high quality market information available in NPD is high new product financial performance. Additionally, market information quality positively influences market predictability that, in turn, has a positive impact on new product performance. Our results support a partial mediation effect of market predictability between the quality of market information and NPD financial performance. Based on these findings, the author discusses the theoretical and managerial implications of this work and proposes paths for future research
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“Space & Satellite Technologies" intercollegiate master-degree courses of study in Tri-City (Poland)
- Marek Chodnicki
- Edmund Wittbrodt
- Adam Dąbrowski
- Zbigniew Łubniewski
Since summer semester of the academic year 2016/2017, two faculties of Gdansk University of Technology GUT (Faculty of Mechanical Engineering and Faculty of Electronics, Telecommunications and Informatics) together with the Gdynia Maritime University (Faculty of Electronics) and the Polish Naval Academy in Gdynia (Faculty of Command and Naval Operations) have opened intercollegiate master - degree studies called: Space and Satellite Technologies (TKiS). Each of these faculties offer for their candidates and conduct special education in case of certain speciality. This initiative is supported by Polish Space Agency and received additional funding from the National Centre for Research and Development. Under the project entitled: Adaptation of the second -degree studies Space and Satellite Technologies, to the needs of the labor market, people involved in the space industry were included in the didactics.
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SPATIAL APPROACH TO HETEROGENEITY OF INFLATION EXPECTATIONS IN THE EURO AREA
- Magdalena Szyszko
- Karolina Tura-Gawron
In this article, we examine the spatial heterogeneities in inflation expectations of the euro area consumers. We expect to find them heterogeneous in our research period of 2001-2016. Contrary to standard examination of heterogeneity, a spatial correlation analysis is applied by referring to global and local correlation measures. It is performed with the economic distance-based weights (the difference in HICP rates). Application of spatial analysis is the main contribution of our examination. Standard examinations ignore spatial relations and might be misleading. Our findings suggest that expectations are heterogeneous once the differences of inflation rates represent economic distance between the countries that we cover by our examination.
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Spatial Evolution of the European Container Ports’ System in Perspective of the Location Theory
- Karolina Krośnicka
The maritime container terminal is nowadays a spatially incoherent object. From the functional point of view it ends, where their most external components are located. The process of location splitting of container terminals is a new phase of their discrete growth. The external container facilities are being built to improve effectivness of the logistic chain in the hinterland. The new components of container terminals have very complex functional program, and thanks to smart technologies they are working together as a one system. The spatail structure of the maritime container terminals' system could be compared to the dendritic shape of a neuron (where the kernel is a terminal, the arms are transportation corridors). The paper aims to present the graphical model explaining the changes in distribution and hierarchy of container terminals’ external elements in relation to the network of the settlement structure.
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Spatially variant PSF modeling in confocal macroscopy
- Anna Węsierska
- Hugues Talbot
- Jean-Christophe Pesquet
The point spread function (PSF) of imaging systems plays an essential role in image reconstruction. In the context of confocal microscopy, optical performance degrades towards the edge of the field of view. In confocal macroscopy, the related artifacts are even stronger, as the field of view is much larger. Because the related PSFs are strongly spatially variant, it is essential to be able to model them with few parameters. The field aberrations in fluorescence macroscopy were observed to be symmetrical and to increase with the distance from the center of the field of view. In this paper we propose an experiment and an optimization method for assessing the center of the field of view. The obtained results constitute an important step towards reducing the number of parameters in macroscopy PSF models.
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Speaker Recognition Using Convolutional Neural Network with Minimal Training Data for Smart Home Solutions
- Mingshan Wang
- Tejaswini Sirlapu
- Alicja Kwaśniewska
- Maciej Szankin
- Marko Bartscherer
- Rey Nicolas
With the technology advancements in smart home sector, voice control and automation are key components that can make a real difference in people's lives. The voice recognition technology market continues to involve rapidly as almost all smart home devices are providing speaker recognition capability today. However, most of them provide cloud-based solutions or use very deep Neural Networks for speaker recognition task, which are not suitable models to run on smart home devices. In this paper, we compare relatively small Convolutional Neural Networks (CNN) and evaluate effectiveness of speaker recognition using these models on edge devices. In addition, we also apply transfer learning technique to deal with a problem of limited training data. By developing solution suitable for running inference locally on edge devices, we eliminate the well-known cloud computing issues, such as data privacy and network latency, etc. The preliminary results proved that the chosen model adapts the benefit of computer vision task by using CNN and spectrograms to perform speaker classification with precision and recall ~84 % in time less than 60 ms on mobile device with Atom Cherry Trail processor.
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Specialist Pavilion Hospitals Of West Prussia In The 19th Century – Evolution Of The Idea
- Anita Jaśkiewicz-Sojak
The size and shape of the largest pavilion hospitals established in West Prussia in the 19th century changed along with the advancing technical and medical knowledge, the progress of ideas regarding modern society, architectural patterns, and the needs for which the hospitals were built. Apart from the medical treatment section, there were administrative, social and technical facilities, all constituting parts of the complex. The hospital part was accompanied by entire neighbourhoods for doctors and other hospital workers, green areas (including parks and cemeteries) and farms. Because of that, the complexes were able to operate as self-sufficient towns ensuring living conditions for several hundred hospital patients and workers. The analysis of these large hospitals, their architecture and spatial arrangement, and comparative research show evolution of the pavilion hospitals idea during the 19th century. They also make it possible to show the studied Prussian hospital establishments in a broader context – compared to the whole of Germany and other European countries. The knowledge about this civilizational and spatial phenomenon is very important for the history of architecture in West Prussia (a German region in the past, a part of present Poland). Also recognizing and acknowledging the heritage, which large Prussian hospitals presently constitute, has great impact on their conservation and preservation.
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Spectral Methods for Modelling of Wave Propagation in Structures in Terms of Damage Detection—A Review
- Magdalena Palacz
Modern methods of detection and identification of structural damage direct the activities of scientific groups towards the improvement of diagnostic methods using for example the phenomenon of mechanical wave propagation. Damage detection methods that use mechanical wave propagation in structural components are extremely effective. Many different numerical approaches are used to model this phenomenon, but, due to their universal nature, spectral methods are the most commonly used, of which there are several types. This paper reviews recent research efforts in the field to show basic differences and effectiveness of the two most common spectral methods used for modelling the wave propagation problem in terms of damage detection.
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Spectroscopic studies of a ring opening process between epoxy- and aminosilanes and imine formation reactions in aqueous solutions
- Mikko Keränen
- Arto Maaninen
- Marcin Gnyba
- Tiina Maaninen
NMR and Raman spectroscopy studies were performed for different 3-aminopropyl(trimethoxy)- and 3-glycidoxypropyl (trimethoxy)silane based sol-gel systems containing different ketones. Exceptionally stable imine products were obtained depending on a reaction system at alkaline pH conditions and in the presence of water. These imine formation reactions were carried out without further catalyst. In addition, effect of water for the epoxy ring opening process was demonstrated, as well as the effect of solvents for the reaction path was confirmed.
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Spin-glass behavior in a binary Pr 3 Ir intermetallic compound
- Karolina Górnicka
- Kamil Kolincio
- Tomasz Klimczuk
Polycrystalline Pr3Ir was synthesized by arc melting. Its cementite-type crystal structure (Pnma) was confirmed by powder X-ray diffraction and estimated lattice parameters are in agreement with literature. Physical properties were measured by means of the ac and dc magnetic susceptibility, electrical resistivity and heat capacity. Our results indicate spin-glass behavior in Pr3Ir with a freezing temperature Tf = 6.58 K and activation energy Ea = 2.17 kBTf.
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Społeczna odpowiedzialność architektury. Problem dyskryminacji etnicznej na przykładzie Gdańska
- Jan Cudzik
- Katarzyna Lejk
Dyskryminacja ze względu na pochodzenie etniczne jest zjawiskiem pojawiającym się w całej Europie, również na terenie Gdańska. Prawie połowa respondentów ankiety przeprowadzonej w Gdańsku zauważa, że głównym powodem dyskryminacji jest odmienne pochodzenie etniczne. Na podstawie dostępnych badań autorzy przybliżają rozmiar zjawiska i jego konsekwencje w kontekście Gdańska. Aspekt historyczny oraz bieżące wydarzenia pozwalają na określenie genezy problemu. Artykuł wykazuje, iż architektura poprzez odpowiedzialne, zaangażowane i świadome projekty ma możliwość wpływania na zmianę zachowań społeczeństwa. Podejmowanie interwencji miejskich, mających na celu polepszenie jakości życia staje się coraz częstszym kierunkiem działań inicjowanym zarówno przez mieszkańców, jak również jednostki miejskie. Psychologia środowiskowa, jest w stanie ułatwić proces projektowania poprzez ukazywanie zależności pomiędzy oddziaływaniem środowiska fizycznego, a człowiekiem. Prezentowane przykłady architektoniczno-urbanistyczne potwierdzają tezę, iż architektura może pozytywnie wpływać na społeczeństwo w aspekcie jego integracji i sustensywnego rozwoju. Przeanalizowane przykłady różnią się zarówno skalą, jak i przyjętym programem. Jednak każdy pokazuje, jak interwencje o zróżnicowanej skali i formie mogą pozytywnie wpływać na społeczeństwo. Szeroki zakres podejmowanych działań i indywidualne podejście do kwestii integracji oraz wyrównywania szans obrazuje, w jaki sposób należy unikać dyskryminacji i znajdować nowe płaszczyzny porozumienia miedzy członkami społeczeństwa.
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Społeczne zamówienia publiczne
- Katarzyna Wińska - Różewicz
- Mariusz Zaborowski
Zamówienia publiczne, to umowy odpłatne zawierane między zamawiającym a wykonawcą, które dotyczą dostaw, usług i robót budowlanych. W artykule przedstawiono pojęcie i genezę społecznych zamówień publicznych, ich rozwój w polskim systemie zamówień publicznych oraz wykorzystywanie klauzul społecznych przez zamawiających. Zwrócono uwagę, powołując się na dane z przeprowadzonej kontroli przez NIK, że promowanie społecznych zamówień nie przynosi pożądanych rezultatów, pomimo tego, że społeczne zamówienia publiczne istotnie mogą wpływać na przedsiębiorców, którzy zatrudniają osoby niepełnosprawne, czy też zatrudniających osoby będące członkami grup społecznie marginalizowanych.
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Sprawdzanie instalacji niskiego napięcia – przegląd postanowień normy PN-HD 60364-6:2016
- Stanisław Czapp
- Edward Musiał
Przedstawiono zasady wykonywania prób i pomiarów w instalacjach elektrycznych niskiego napięcia. Dokonano przeglądu postanowień normy PN-HD 60364-6:2016-07, dotyczącej sprawdzania instalacji, i zwrócono uwagę na zmiany przez nią wprowadzone.
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Sprawność elastycznych protez stóp w kontekście współczesnych materiałów
- Magda Dziaduszewska
Klasyfikacja protez stóp opiera się głównie na ich zachowaniu w momencie kontaktu z podłożem. Pod tym względem wyróżniamy stopy sztywne oraz sprężyste, charakteryzujące się możliwością tłumienia drgań i magazynowania oraz uwalniania energii. Współczesne elastyczne protezy stóp przeznaczone dla osób wykazujących wysoką i bardzo wysoką aktywność wytwarzane są z materiałów kompozytowych zawierających włókna węglowe. W zależności od modyfikacji kompozytów, stopa może uzyskać różną sprawność – stosunek energii uwolnionej do zmagazynowanej. Im większa aktywność pacjentów tym wyższy stopień mobilności (K) i możliwość zastosowania protezy o wyższej sprawności. Nieujednolicone metody pomiarowe charakterystyki energetycznej protez powodują nieścisłości w określaniu sprawności powodując tym samym trudności w optymalnym doborze stopy do aktywności pacjenta. W niniejszym artykule omówiono pojęcie sprawności w kontekście elastycznych protez stóp. Przedstawiono zagadnienia związane z transferem energii w trakcie chodu, a także dokonano klasyfikacji rodzaju protez stóp dostępnych na rynku z uwzględnieniem ich sprawności.
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Stability analysis of a road scarp in the Carpathian Mountains and methods of its protection
- Lesław Zabuski
- Jarosław Przewłócki
The purpose of the study was to analyse the stability of a road scarp endangered by a landslide and to consider some measures for its stabilization. The potential landslide could unfavourably alter the shape of the slope, thus a religious sanctuary situated above the slope. The present research has resulted in suggestions of possible protection methods, namely, drainage, soil nailing, installation of piles, supporting the scarp with a soil prism. They appear to be equally effective in improving the stability conditions. Therefore, the criteria for choosing one of them are rather arbitrary, and the choice should be made on the basis of economic considerations.
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Stability of roof trusses stiffened by trapezoidal sheeting and purlins
- Natalia Korcz-Konkol
- Piotr Iwicki
In the article linear buckling analysis of a set of steel trusses braced by purlins and trapezoidal sheeting are conducted. The buckling load factor due to the height of a corrugated sheeting profile is investigated in parametric studies. The minimal height of trapezoidal sheeting required for preventing the sheeting and chords of the trusses against the buckling is obtained. Two groups of models are considered: “axial” model as a simple one and “eccentric” model as a more complex one. In the second group of models, eccentricity between the top chord of the trusses and purlins is considered, by means of equivalent beam elements. The differences between models are indicated and the results are discussed.
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Stabilność systemu elektroenergetycznego
- Jan Machowski
- Zbigniew Lubośny
Książka na 900 stronach prezentuje w sposób dogłębny zagadnienia związane ze stabilnością systemów elektroenergetycznych.
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Stable nanoconjugates of transferrin with alloyed quaternary nanocrystals Ag–In–Zn–S as a biological entity for tumor recognition
- Edyta Matysiak-Brynda
- Piotr Bujak
- Ewa Augustin
- Agata Kowalczyk
- Zofia Mazerska
- Adam Pron
- Anna Maria Nowicka
One way to limit the negative effects of anti-tumor drugs on healthy cells is targeted therapy employing functionalized drug carriers. Here we present a biocompatible and stable nanoconjugate of transferrin anchored to Ag-In-Zn-S quantum dots modified with 11-mercaptoundecanoic acid (Tf-QD) as a drug carrier versus typical anticancer drug, doxorubicin. Detailed investigations of Tf-QD nanoconjugates without and with doxorubicin by fluorescence studies and cytotoxic measurements showed that the biological activity both the transferrin and doxorubicin was fully retained in the nanoconjugate. In particular, the intercalation capabilities of free doxorubicin versus ctDNA remained essentially intact upon its binding to the nanoconjugate. In order to evaluate these capabilities, we studied the binding constant of doxorubicin attached to Tf-QD with ctDNA as well as the binding site size on the ctDNA molecule. The binding constant slightly decreased compared to that of free doxorubicin while the binding site size, describing the number of consecutive DNA lattice residues involved in the binding, increased. It was also demonstrated that QD alone and in the form of nanoconjugate with Tf were not cytotoxic towards human non-small cell lung carcinoma (H460 cell line) and the tumor cell sensitivity of the DOX-Tf-QD nanoconjugate was comparable to that of doxorubicin alone.