2014 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2014

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THE CASE OF MANAGEMENT CONCEPTS IN CIVIL AVIATION BUSINESS.
- Aleksander Orłowski
- Edward Szczerbicki
2014
The article presents the changes in management concepts used in civil aviation business in last 25 years. There is a need to make prognosis and support decision-making processes with different models but each model is adapted to current management concept. This article will present the changes and possible future trends in management concepts with the description of strengths and weaknesses of each of them. These might be used in the future works on building the models to support decision making processes which is the final goal of the future works. The article consists of four main parts, first there is a market presented with the history and current changes. Next the main changes in management concepts are presented, basing on the example of one airline, LOT Polish Airlines. Part three consists of presentation of strengths and weaknesses of each management concept. The article is concluded and future works are presented in fourth section.
The change of mechanical properties of selected wood species after drying process under various conditions
- Jacek Barański
- Maciej Wierzbowski
- Aleksandra Konopka
2014 Annals of WULS, Forestry and Wood Technology
The result of mechanical properties change of selected wood species after drying process under various parameters are presented. The global elasticity modulus and bending strength for steam dried, air-steam mixture dried and air dried samples as reference were measured. It allowed to reveal the effect of wood stream, air-steam mixture and their temperature on mechanical properties of wood. It has been recognized that steam and air-steam mixture drying cause of the mechanical properties changes of analyzed wood species.
The Complexity of Zero-Visibility Cops and Robber
- Dariusz Dereniowski
- Danny Dyer
- Ryan M. Tifenbach
- Boting Yang
2014
In this work we deal with the computational complexity aspects of the zero-visibility Cops and Robber game. We provide an algorithm that computes the zero-visibility copnumber of a tree in linear time and show that the corresponding decision problem is NP-complete even for the class of starlike graphs.
The concept of capillary forces supported evaporator for application to domestic ORC unit
- Dariusz Mikielewicz
- Krzysztof Błauciak
2014
In the paper presented are studies on the investigation of the capillary forces effect inducted in the porous structure of a loop heat pipe. The potential application of such heat exchanger is for example an evaporator of the domestic micro CHP unit. Preliminary analysis of the results indicates water as having the best potential, however taking into account all issues it can be said that the best effect is obtained using ethanol.
The Concept of Construction of Hybrid Constructed Wetland for Wastewater Treatment in Roztocze National Park
- Krzysztof Jóżwiakowski
- Michał Marzec
- Magdalena Giżińska-Górna
- Aneta Pytka
- Anna Skwarzyńska
- Tomasz Słowik
- Alina Kowalczyk-Juśko
- Magdalena Gajewska
- Aleksander Steszczuk
- Tadeusz Grabowski
- Zbigniew Szawara
2014 Pełny tekst Barometr Regionalny. Analizy i Prognozy
Roztocze National Park (RNP) is one of 23 national parks in Poland. It was created in 1974 both to protect the natural and cultural heritage as well as to share the park area for science, education and tourism. In caring for the environment, the park removed asbestos coverage, performs thermo-modernization using renewable energy sources by the installation of solar panels and photovoltaic cells on the roofs of buildings, and pellet stoves are installed in boiler rooms. Part of these actions includes the application of innovative technologies for water and wastewater, related to e.g. recovery of rainwater for washing cars and the construction of wastewater treatment wetlands. RNP has been spreading for many years the knowledge about the methods used to most effectively care for the natural environment. Constructed wetland (CW) technology could be one of such methods. The current research shows that facilities working in CW technology provide high pollutant removal and full guarantee of high ecological impact with low operating cost, so they can be used to protect the aquatic environment in protected areas and valuable landscapes. The paper presents a concept of solving the problems of wastewater treatment by means of using hybrid constructed wetland in three villages in the forest of Roztocze National Park. The advantages of the proposed technology are easy and simple operation, high resistance to irregular supply of water treatment and very low operating costs compared to conventional solutions. The natural look of CWs allows easy incorporation into the existing landscape.
The concept of intergenerational cooperation network - the transfer of knowledge and skills
- Katarzyna Tubielewicz
2014
The aim of this article is to present the idea of networking with regard to the exchange of knowledge between generations.
The contactless method of chip-to-chip high-speed data transmission monitoring
- Marek Zmuda
- Stanisław Szczepański
- Sławomir Kozieł
- Szymon Graczyk
2014 Pełny tekst Bulletin of the Polish Academy of Sciences-Technical Sciences
This paper presents a technique of decoupling diﬀerential signals transmitted in a pair of microstrip lines on a printed circuit board (PCB), using dedicated coupler for high speed data transmission monitoring in chip-to-chip interconnections. The coupler used for signal probing is overlayed on the pair of microstrip lines under test, and provides a signal to the next blocks of the measurement system without disturbing transmission in the lines. Starting from the basic conﬁguration obtained in the previous work, we describe a procedure of re-designing the coupler for enhanced directivity so that it is suitable for high-speed data transmission monitoring. The new coupler structure has improved topology based on stepped-impedance resonators with geometry parameters adjusted using numerical optimization techniques. The correctness of the design has been conﬁrmed by the time-domain measurements performed for real chip-to-chip communication signals, using a dedicated measurement system based on Xilinx Virtex-6 FPGA Development Kit. The presented technology can be used for reducing the cost of the product diagnostics by eliminating dedicated measurement connectors, run-time system debugging or reverse engineering.
The convergence of gender wage differences - myth or fact - multi country multi sector analysis
- Joanna Wolszczak-Derlacz
2014
The Becker’s theory of discrimination predicts that in the long run the gender wage differences should disappear. In our empirical analysis we verify the testable implications of this mode considering the hypothesis of gender wage gap convergence. The study takes into account 31 sectors in 13 European countries for the period between 1970 and 2005. We distinguish between wages paid to different groups of workers classified according to skill level: high, medium and low. We estimate dynamic model of absolute and conditional wage gap convergence. The latter takes into account potential channels influencing female/male wage differentials such as sector’s concentration and openness. The result indicate that the highest speed of convergence is observed for workers with tertiary education (high-skilled), lowest for medium-skilled. The role of sector’s concentration and trade was confirmed. Sector’s concentration is connected with higher gender wage gap growth while the trade effect depends on skilled categories. For high and medium-skilled workers trade is connected with higher gap while for low-skilled workers with lower.
The Corporate Museum: A New Type of Museum Created as a Component of Marketing Company
- Ksenia Piątkowska
2014 International Journal of the Inclusive Museum
A new type of museum appeared – the corporate museum. The museum institution in this instance has been used as a new marketing device for building corporate identity strategies. Their inception is not based on the existing context of a place, but appears to be integrated with the corporate identity program, exposing the company’s values and philosophy. The corporate museums are thematic, commercial buildings, owned by a particular firm, where the history of the company brand and products development is presented. Architecture of corporate museums must doubtless be identified with the brand, reflecting the high quality of a brand’s products. The surveys were carried out on freshly constructed corporate museums like Porsche, Mercedes and BMW Welt. They are located next to the factories where the brand products are manufactured. The immediate vicinity of the corporate museum to the production zone allows the exhibition to extend to the production line. Corporate museums generate considerable benefits, as the cultural potential of a space where the museums are built increases. Their outside-the-city location economically activates forgotten zones of the town. Corporate museums extend the city’s tourist and cultural offer and their buildings become a recognizable element in a city’s marketing image. These facts prove that museum institutions can be successfully used for commercial purposes.
The crystal structure of (1RS,4RS,5RS,6SR)-5-cyano-5-nitro-6-phenyl-bicyclo[2.2.1]hept-2-ene
- Agnieszka Łapczuk-Krygier
- Łukasz Ponikiewski
- Radomir Jasiński
2014 CRYSTALLOGRAPHY REPORTS
Structure of nitronorbornene derivative C14H12N2O2 synthesized in the reaction of cyclopentadiene with E-2-phenyl-1-cyano-1-nitroethene was determined by single crystal X-ray diffraction analysis. It was found that in analyzed molecule the nitro group is in endo-position whereas phenyl group have exo-ori-entation.
The Current State-of-the-Art in the Determination of Pharmaceutical Residues in Environmental Matrices Using Hyphenated Techniques
- Anna Jakimska-Nagórska
- Agata Kot-Wasik
- Jacek Namieśnik
2014 CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
Several thousand tons of pharmaceuticals and their transformation products (metabolites and degradation products) are introduced into the environment each year. They affect both human health and the environment, therefore, analytical procedures enabling the determination of a wide range of pharmaceuticals at trace levelswithminimal effort, time, and energy are required. Nowadays, hyphenated techniques are commonly applied in pharmaceutical analysis. This article provides a brief overview of the state-of-the-art and future trends in the determination of pharmaceutical residues and their transformation products with a focus on themost popular techniques in the field, such as ultra or high-performance liquid chromatography (UHPLC or HPLC) coupled with tandem mass spectrometry (MS/MS), quadrupole time-of-flight (QTOF), and a hybrid quadrupole/linear ion trap (QqLIT) in different environmental matrices (water, soil/sediment). Attention is paid to different aspects, benefits, and limitations of the application of UPLC and mass spectrometry–based techniques.
The decay of quantum correlations between quantum dot spin qubits and the characteristics of its magnetic-field dependence
- Paweł Mazurek
- Katarzyna Roszak
- Paweł Horodecki
2014 EPL-EUROPHYS LETT
We address the question of the role of quantum correlations beyond entanglement in the context of quantum magnetometry. We study the evolution of the rescaled variant of the geometric quantum discord of two electron-spin qubits interacting with an environment of nuclear spins via the hyperfine interaction. We have found that quantum correlations display a strong magnetic-field sensitivity which can be utilized for decoherence-driven measurements of the external magnetic field. The discord-based measurement is sensitive to a wider range of magnetic-field values than the entanglement-based measurement, including very small fields which are inaccessible via entanglement.
The Decisional DNA-Based Smart Bike for Internet of Things
- Haoxi Zhang
- Cesar Sanin
- Edward Szczerbicki
- Zhongyuan Ren
- Zhou Fang
- Tailiang Chen
2014
In this paper, we introduce a novel application of the Internet of Things, the Decisional DNAbased Smart Bike. The Decisional DNA is a domain-independent, flexible and standard knowledge representation structure; it allows its domains to acquire and store experiential knowledge and formal decision events in an explicit way. By using Decisional DNA, the sensor-equipped bicycle is able to learn its user’s weight, riding habits, etc. Main issues in using this Decisional DNA-based approach include adapting Decisional DNA for IoT applications, capturing and storing data on IoT, and discovering and reusing knowledge from captured data. We demonstrate our approach in a set of experiments, in which the bike captures data of the user and reuses such data to distinguish its user. The result shows that the Decisional DNA can be used on IoT applications enabling knowledge capturing and reusing.
THE DETERMINATION OF ABRASION RESISTANCE OF SELECTED BIOMATERIALS FOR THE FRICTION PAIRS IN THE HIP JOINT ENDOPROSTHESIS
- Katarzyna Zasińska
- Tomasz Seramak
- Jacek Łubiński
2014 Pełny tekst Advances in Materials Science
The key requirement for the modern endoprosthesis is high durability of the friction components, which results in long and trouble-free operation in the human body. The durability of currently used endoprosthesis is often limited by tribological wear processes of friction components (e.g. between the head and the acetabular component in a hip joint endoprosthesis) [8, 19, 23, 24]. In order to compare the tribological wear, tribological tests were carried out by means of tribometer on friction pairs of the following composition: implantation steel 316 LVM/PE-UHMW and titanium alloy Ti13Nb13Zr/PE-UHMW. Determining of the friction coefficient, measured profiles of surface roughness and microscopic observation allowed to evaluate the abrasive wear of the tested biomaterials.
The digital divide and the issue of participation of persons aged 50+ in the Polish labour market
- Anita Richert-Kaźmierska
- Katarzyna Stankiewicz
2014
The main objective of this article is to present the debate on the level of digital literacy of people aged 50+ and the consequences of deficits in this area. Due to the limited scope of the report, particular attention is paid to the impact of low IT skills of people aged 50+ on their situation in the labour market.
The Doppler effect in a bistatic system for determining the position of moving targets
- Zawisza Ostrowski
2014 Pełny tekst HYDROACOUSTICS
The article presents the theoretical analysis and the results of numerical calculations of the Doppler effect it occurs in a system designed to determine the position and speed of a moving target. The transmitter is the source of the signal and it emits a sinusoidal, acoustic and continuous wave. Signal reflected off a moving target is received by four hydrophones. Based on the signals, four Doppler shifts are determined and inserted into a set of equations. The solution gives instantaneous target coordinates and the vector of target speed. Analytical formulas are given which describe the spectra of the Doppler shift of echo signals in a bistatic system, as well as numerically determined examples. Spectral lines are assigned to instantaneous target positions. This provides the basis for solving the above set of equations and the functioning of the system.
The effect of calcination temperature on structure and photocatalytic properties of Au/Pd nanoparticles supported on TiO2
- Anna Malankowska
- Jacqueline B. Priebe
- Marga-Martina Pohl
- Janusz W. Sobczak
- Matthias Schneider
- Anna Zielińska-Jurek
- Angelika Bruckner
- Adriana Zaleska-Medynska
2014 APPLIED CATALYSIS B-ENVIRONMENTAL
Bimetallic nanoparticles, composed of two different metal elements, can exhibit peculiar electronic, optical, and catalytic or photocatalytic properties that are absent in the corresponding monometallic nanoparticles. We show the effect of calcination temperature (from 350 to 700°C) on the structure and the photocatalytic properties of Au/Pd-modified TiO2. The composition of the bimetallic Au/Pd nanoparticles in relation to their photocatalytic performance as well as their ability to form radical species under UV and visible light as detected by EPR technique has been investigated. Au/Pd bimetallic nanoparticles formed at the TiO2 surface in the microemulsion system have an Au-rich core and a Pd-rich shell. Increasing temperature from 350 to 700°C during calcination step, causes gold-enrichment in the surface region. Visible light initiated activity in phenol degradation reaction was observed only for Au/Pd- TiO2 samples calcinated at 350 and 400°C. Further metal re-distribution, observed upon increasing temperature from 450 to 700°C causes gold-enrichment in the surface region of Au/Pd nanoparticles, finally leading to visible light photoactivity decrease due to weaker ability of charge carriers formation during excitation of gold, compared to palladium.
The effect of high pressure at subzero temperature on proteins solubility, drip loss and texture of fish (cod and salmon) and mammal’s (pork and beef) meat
- Edyta Malinowska-Pańczyk
- M. Walecka
- Roman Pawłowicz
- Robert Tylingo
- Ilona Kołodziejska
2014 FOOD SCIENCE AND TECHNOLOGY INTERNATIONAL
One of the possibilities of using high pressure technique in inactivation of microorganism is conducting this process at subzero temperature. However, for its practical application in meat preservation the appropriate properties of meat should be kept. Therefore, the aim of this work was to examine the effect of pressure at subzero temperature (without freezing of water) on proteins and texture of mammal’s and cold-adapted fish meat. The data showed that cod and salmon meat proteins were more susceptible to pressure induced denaturation/aggregation than beef and pork proteins. Glucose and saccharose exerted protective effect on fish meat proteins treated with pressure of 111 MPatc and -10°C but not at 193 MPatc and -20°C. The pressure treatment under the latter conditions increased cook loss of fish meat but not of mammal’s meat. However, after cooking the hardness of all kinds of pressurized meat was at the same level as that for unpressurized cooked samples.
The effect of preparation route on structure and photocatalytic properties of bimetallic nanoparticles (Au/Pd, and Au/Pt) deposited at TiO2 surface
- Adriana Zaleska-Medynska
- Anna Gołąbiewska
- Anna Malankowska
- Marga-Martina Pohl
- Janusz W. Sobczak
- Anna Zielińska-Jurek
- Angelika Bruckner
2014
Noble metal nanoparticles have often been used to enhance the photocatalytic activity of TiO2 and to extend the absorption wavelength from the ultraviolet to visible region. Bimetallic nanoparticles, composed of two different metal elements, can exhibit peculiar electronic, optical, and catalytic or photocatalytic properties that are absent in the corresponding monometallic nanoparticles. In this work we show the effect kind and amount of metal precursor, calcination temperature and TiO2 matrix on the on the structure and photocatalytic activity of titanium dioxide loaded with Au/Pt and Au/Pd nanoparticles.
The Effect of Water and Frost on Fatigue Life of Asphalt Concrete
- Piotr Jaskuła
- Józef Judycki
2014
This paper presents testing of fatigue life of asphalt concrete that has been subjected to action of water and frost. Simulation of water and frost action was based on the original AASHTO T283 method and its modification. The original method was modified in such a way that instead of a single freeze-thaw cycle, 50 and 150 cycles were applied. Fatigue life was measured in the indirect tensile fatigue test in the Nottingham asphalt tester (NAT) apparatus. The asphalt concrete specimens were prepared in the laboratory. Some specimens contained liquid adhesive agent (namely fatty amine), and others did not. The detrimental effect of water and frost was clearly identified. The testing procedure results and practical conclusions are presented.