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Search results for: MARKAL
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Method for Assessing Rail Transport Competitiveness in Poland and the United Kingdom
PublicationBoth in Poland and United Kingdom, as well as worldwide, railways have to compete with other modes of transport, and the rail industry seeks for possibilities of achieving a competitive advantage over them. Thus, there is a need for methods for assessment of rail transport competitiveness and detection of areas for improvement. This paper presents a method developed for the Polish regional transport market and verified according...
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Experimental economics in business education: Using simple games to achieve multifaceted effects
PublicationEconomics differs from other sciences not only because of its normative part, but also because of very limited use of experiments. In this way, economics is often perceived as being methodologically more similar to astronomy or meteorology rather than physics or chemistry. Over last decades, however, experimental economics has been significantly developed. This chapter presents some of the possibilities for academic teachers to...
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Innovative management of IT projects with the use of the agent-based approach on the basis of intelligent agents
PublicationProject management is one of the major challenges for the modern economy. Dynamic changes in the structures of organizations which form the core of the economy imply changes in both management processes and structures. One element of these changes is a new approach to the manufacturing of modern and rapidly changing products (due to changing market requirements). As part of these changes, traditional organizational structures are...
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Cybersecurity in the Electricity Sector
PublicationThis book offers a systematic explanation of cybersecurity protection of electricity supply facilities, including discussion of related costs, relevant standards, and recent solutions. The author explains the current state of cybersecurity in the electricity market, and cybersecurity standards that apply in that sector. He then offers a systematic approach to cybersecurity management, including new methods of cybersecurity assessment,...
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LABOUR SHARE IN THE DOMESTIC INCOME COMPARED TO DIFFERENT LABOUR MARKETS
PublicationThe purpose of this paper is to examine the changes in the share of labour in the domestic income in the years 1995-2010 in the Visegrád Group states, taking into account the level of development of the domestic labour markets. The study involves a review of the literature relating to the labour market issues, collecting sources and their use in the empirical part. The study used the induction method, the elements of descriptive...
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Sylwetki gdańskich uczonych podejmujących badania w obszarze fennistyki i saamistyki [prof. dr hab. Zenon Ciesielski, prof. nadzw. dr hab. Hieronim Chojnacki, prof. nadzw. dr hab. Kazimierz Musiał, prof. nadzw. dr hab. Katarzyna Wojan; prof. nadzw. dr hab. Hanna Dymel-Trzebiatowska, prof. nadzw. dr hab. Maria Sibińska, prof. nadzw. dr hab. Barbara Szordykowska, prof. nadzw. dr hab. Emilia Denkiewicz-Szczepanek]
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POLAND European Union
PublicationThe International Society of City and Regional Planners (ISOCARP) took an initiative to illustrate the processes of the spatial development of the member countries in the International Manual of Planning Practice (IMPP). The innovative aspect of this unique source of information is to emphasize the relationship between the planning system and its application in practice. The book consists of a concise synthesis of planning systems...
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Towards Cognitive and Perceptive Video Systems
PublicationIn this chapter we cover research and development issues related to smart cameras. We discuss challenges, new technologies and algorithms, applications and the evaluation of today’s technologies. We will cover problems related to software, hardware, communication, embedded and distributed systems, multi-modal sensors, privacy and security. We also discuss future trends and market expectations from the customer’s point of view.
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Z historii polonijnych stowarzyszeń inżynierów i techników
PublicationPrzedstawiono ogólną charakterystykę wybranych polonijnych stowarzyszeń inżynierów i techników działających w Europie i Ameryce. Podano motywy ustanowienia międzynarodowego dnia inżyniera, obchodzonego corocznie 4 marca, począwszy od roku 2020.
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Biznesplan dla zakładu podstawowej opieki zdrowotnej o rozszerzonej działalności na obszarze dzielnicy Gdańsk-Południe
PublicationIn recent years we have seen the dynamic development of medical services sector in Poland. Private health centres focus on aggressive development strategy. The role of primaryhealth care facilities, which provide services financed from the public funds, declined.The purpose of the article is to present methods of strategic planning which allow toopen new healthcare entity. The next purpose is to make in practice...
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Is There any Demand for the Workers Aged 50+ in Poland?
PublicationThe process of ageing affects all the European Union Member States, including Poland. According to forecasts by the Central Statistical Office, in 2035, the population of Poland will decrease in relation to 2010 by more than 2 million, and the share of people aged 50+ in the total population will increase from 34.8% to 46.6% (Prognoza ludności 2009). In the context of current and projected demographic changes, a discussion is taking...
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Renewable and Sustainable Energy: Current State and Prospects
PublicationThe last two decades of the twentieth century represented a period of above-average, systematic growth of formal and informal interdependencies between economies of different countries and between world markets. The intensity, magnitude, and diversity of these interdependencies have never been recorded before in economic history, and the market transformations taking place have been referred to in the literature as the process...
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Information and communication technologies versus diffusion and substitution of financial innovations. The case of exchange-traded funds in Japan and South Korea
PublicationThe substitution between financial innovations, exchange-traded funds (ETFs), and stock index derivatives (i.e. index financial instruments) is one of the relatively understudied topics of the financial sciences. The current study aims to verify empirically the diffusion and substitution of ETFs in the market for index financial instruments. It presents in-depth analysis of the development of index financial instruments traded...
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Intraday price reaction to filing bankruptcy and restructuring proceedings – the evidence from Poland
PublicationThis chapter presents the results of research on the price reaction of shares listed on the Warsaw Stock Exchange to filing bankruptcy and/or restructuring applications. Event study was adopted as the research method, and it was performed at 10, 5, and 1-minute intervals. It was found that the reaction is rapid, as it takes 1–2 minutes after the information on bankruptcy and restructuring applications was made public. Significantly...
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Cryptocurrencies as a Speculative Asset: How Much Uncertainty is Included in Cryptocurrency Price?
PublicationThe aim of this paper is to examine the relationship between uncertainty indices (Geopolitical Uncertainty Index and Global Economic Policy Uncertainty Index) and cryptocurrencies. This study evaluated the behavior of cryptocurrencies with the evolution of uncertainties (GPU, EPU) on returns and volatility in terms of safe heaven as in traditional specualtive assets it increases their volaitility and reduces risk. For this purpose,...
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Analiza zrealizowanych systemów komunikacji wizualnych dedykowanych miastom w kontekście identyfikacji wizualnej Miasta Gdańska
PublicationNiniejsze opracowanie to raport z dokonanej analizy zrealizowanych systemów komunikacji wizualnej miast i zbadanie możliwości kształtowania, rozwoju i uspójnienia identyfikacji wizualnej marki miasta Gdańsk. Wyniki analizy mogą służyć Miastu Gdańsk jako materiał referencyjny przy ocenie obecnych opracowań własnych i prowadzeniu bieżącej komunikacji swojego wizerunku ale przede wszystkim służą jako materiał bazowy do profesjonalnej...
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Transforming the Gdansk Bay Area
PublicationThe political transformation of Poland in the early nineties from a centrally steered economy to a free market economy entailed changes of the spatial planning system. The impact of these changes on the spatial transformations and current shape of urban structures in the Gdansk Bay Metropolitan Area is apparent and significant. The paper concentrates on the present spatial phenomena of Gdansk Agglomeration resulting from the main...
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Alternative Energy: Photovoltaic Solar Cells
PublicationSolar radiation is a fuel for photovoltaic cells and modules, which are a source of electric energy. Viable solar technologies that have been developed in the past are starting to be adopted on a broader and more meaningful global scale across different sectors with ever-increasing market penetration. In this entry, a brief overview of the material properties relevant to solar cell operation, the structure of the solar cell, and electrical...
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The Response of Selected Domestic Capital Markets on the Development of COVID-19 Pandemic – a Broader View
PublicationObjective: The study examines how the record of the first, hundredth, thousandth, ten-thousandth, one-hundred-thousandth, and millionth cases of COVID-19 affected investor behaviour in capital markets. It also looks at whether the month in which the first case was recorded in a given market affected the direction and strength of investor reactions. Lastly, it verifies whether the two announcements made by the WHO related to COVID-19...
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Badania obserwatorów proporcjonalnych w multiskalarnym układzie sterowania silnika indukcyjnego
PublicationW artykule przedstawiono wyniki badań laboratoryjnych proporcjonalnego obserwatora Luenbergera strumieni magnetycznych silnika indukcyjnego. W celu potwierdzenia poprawności przyjętych kryteriów doboru parametrów obserwatora badania przeprowadzono dla czterech różnych zestawów tych parametrów. Jakość odtwarzania zmiennych stanu w obserwatorze oceniono na podstawie jakości działania multiskalarnego układu sterowania wykorzystującego...
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Sastosowanie układów całkujących odpornych na składową stałą w całkującym obserwatorze zmiennych stanu silnika indukcyjnego
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Comparison of the effect of montmorillonite, magnesium hydroxide and a mixture of both on the flammability properties and mechanism of char formation of HDPE composites
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Ab initio study of phenyl benzoate: structure, conformational analysis, dipole moment, IR and Raman vibrational spectra
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Cracking of the Vault in a Church Building and Activities Undertaken in the View of the Further Mining Exploitation
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INFLUENCE OF THE DEGREE OF EJACULATE DILUTION ON THE RESULTS OF THE ASSESSMENT OF MOTILITY OF SPERM OF BREEDING BULLS OBTAINED BY TWO METHODS
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Zastosowanie całkującego obserwatora Luenbergera w multiskalarnym układzie sterowania silnika indukcyjnego
PublicationW artykule przedstawiono wyniki badań laboratoryjnych całkującego obserwatora Luenbergera strumieni magnetycznych silnika indukcyjnego. Przedstawiono model matematyczny obserwatora całkującego, z uwzględnieniem zastosowanego algorytmu całkowania umożliwiającego uniknięcie problemów z kumulacją składowej stałej zakłócającej sygnały mierzone przez obserwator. Jakość odtwarzania zmiennych stanu została oceniona na podstawie jakości...
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Energy Level Structure of Bi3+ in Zircon and Scheelite Polymorphs of YVO4
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Comparison of single best artificial neural network and neural network ensemble in modeling of palladium microextraction
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Antimicrobial Effect of Essential Oil of Ziziphora tenuior on Water by Heterotrophic Plate Counts Method in Kerman (Southeast of Iran)
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The Problems of Application of PVD/CVD Thin Hard Coatings for Heavy-Loaded Machine Components
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Broadband Sonar with a Cylindrical Antenna
PublicationSkutkiem wzrostu szerokości widma sygnałów w sonarach z płaskimi antenami jest wzrost szerokości odchylanych wiązek, jeżeli beamformer dokonuje kompensacji faz tylko na częstotliwości środkowej widma. W artykule przedstawiono wyniki obliczeń, które odpowiadają na pytanie, czy podobny efekt występuje w szerokopasmowych sonarach z anteną cylindryczną. Obliczenia przeprowadzono dla anten nadawczych o szerokich wiązkach i anten odbiorczych...
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Homology algorithm based on acyclic subspace
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Badania nieniszczące jakości spoin szyn poddźwigowych na nabrzeżu przeładunkowym T1 w DCT w Porcie Północnym
PublicationCelem podstawowym niniejszego opracowania było sprawdzenie za pomocą NDT jakości spoin wykonanych w ramach prac naprawczych w DCT w roku 2017 (styki szyn poddźwigowych typu A120 na nabrzeżu T1 w DCT Port Północny Gdańsk). W ramach opracowania: 1) Ustalono zakres badań - na podstawie potrzeb Kierownictwa Infrastrukury DCT; b) Analizowano wyniki badań nieniszczących wykonanych w sierpniu 2017r.;...
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Shallow Water Experiment of OFDM Underwater Acoustic Communications
PublicationThe large variability of communication properties of underwater acoustic channels, and especially the strongly varying instantaneous conditions in shallow waters, is a challenge for the designers of underwater acoustic communication (UAC) systems. The use of phase modulated signals does not allow reliable data transmission through such a tough communication channel. However, orthogonal frequency-division multiplexing (OFDM), being...
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Direction-of-Arrival Estimation Methods in Interferometric Echo Sounding
PublicationNowadays, there are two leading sea sounding technologies: the multibeam echo sounder and the multiphase echo sounder (also known as phase-dierence side scan sonar or bathymetric side scan sonar). Both solutions have their advantages and disadvantages, and they can be perceived as complementary to each other. The article reviews the development of interferometric echo sounding array configurations and the various methods applied...
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Impact of Spatial Noise Correlation on Bearing Accuracy in DIFAR Systems
PublicationDIFAR type underwater passive systems are one of the more commonly used tools for detecting submarines. At the design stage, which usually uses computer simulations, it is necessary to generate acoustic noise of the sea. It has been shown that correlating noise significantly reduces these errors compared to the assumption that noise is uncorrelated. In addition, bearing errors have been shown to be the same in systems with a commonly...
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Przyłącza wodociągowe
PublicationPrzyłącze wodociągowe. Zasady włączania się do sieci. Rozwiązania konstrukcyjne.
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Assessing the damage importance rank in acoustic diagnostics of technical conditions of the internal combustion engine with multi-valued logical decision trees
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Analysis of loading history influence on fatigue and fracture surface parameters using the method of induction trees
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Replica Exchange and Multicanonical Algorithms with the Coarse-Grained United-Residue (UNRES) Force Field
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Model hydrodynamiczny cyrkulacji w instalacjach c.w.u.
PublicationW referacie opisano formalnie poprawny, kompletny model matematyczny cyrkulacji ciepłej wody użytkowej. Przedstawiono oznaczony układ równań dla przykładowej, niewielkiej lecz dostatecznie dużej i kompletnie wyposażonej instalacji. Policzono i zbilansowano liczbę równań i niewiadomych. Wskazano preferowane metody rozwiązywania takiego układu równań. Jest to materiał oryginalny (opracowany przez autorów od początku do końca), do...
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Application of Maximum Lenght Sequence in Silent Sonar
PublicationSilent sonars are designed to reduce the distance over which their sounding pulses can be detected by intercept sonars. In order to meet this objective, we can use periodical sounding signals that have low power, a very long duration and wide spectrum. If used in the silent sonar's receiver, matched filtration ensures very good detection of motionless or slow moving targets. However, it is more difficult to detect echo signals...
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Application of microturbines in CHP systems with reciprocating engines
PublicationThe analysis was carried out for Combined Heat and Power generation systems with micro-turbines power plants working on heat rejected from the reciprocating engine. The calculations were performed for GE Jerbacher engines of J320 GS- C05, J320 GS- C25 and J416 GS- B05 types. We considered different working media (both wet and dry fluids): water, ammonia, ethanol, methanol, methylacetylene (propyne), dimethyloether, sulphur dioxide,...
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Pressure Pulsations in Turbine Blade Seal
PublicationThe paper presents the results of experimental investigations into pressure forces generated in a turbine labyrinth seal. The experiments were performed on a single-stage air model turbine of the impulse type. The performed experimental research proved that in a shroud clearance the pressure pulsates and the effects of the nozzle trailing edge thickness as well as the influence of the rotor blades are observed. The exemplary results...
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Wyznaczanie i symulacje sytuacji miarodajnych przy wymiarowaniu kanalizacji ciśnieniowej
PublicationOmówiono starannie wypracowaną metodę wymiarowania kanalizacji ciśnieniowej. Istotnymi elementami metody są poszukiwania opisów trzech różnych grup charakterystycznych sytuacji eksploatacyjnych w projektowanym systemie. Są to: (1) sytuacje miarodajne z punktu widzenia rozmiarów ewentualnego uderzenia hydraulicznego, (2) sytuacje miarodajne dla zapewnienia wymaganych warunków samooczyszczania, (3) sytuacje miarodajne dla doboru...
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Design analysis of turbines for co-generating micro-power plant working in accordance with organic Rankine's cycle
PublicationPrzedstawiono wyniki analizy projektowej turbin dla mikrosiłowni kogeneracyjnej pracującej według organicznego obiegu Rankine'a z wykorzystaniem biopaliwa. Rozważono zakres mocy cieplnej od 25kW do 100kW, któremu odpowiadała możliwa do uzyskania moc elektryczna od 2kW do 12kW. Przeanalizowano projekty turbin osiowych (jedno- i wielostopniowych, także z częściowym zasilaniem), turbin promieniowych i promieniowo-osiowych. Porównano...
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Analiza właściwości sonaru z falą ciągłą i modulacją kodową
PublicationSonary z falą ciągłą, w odróżnieniu od sonarów impulsowych, mogą być wykorzystywane do quasi ciągłej obserwacji celów oraz jako ciche sonary trudno wykrywalne przez obce systemy nasłuchu (sonary przechwytujące). W sonarach z falą ciągłą stosowana jest zwykle liniowa modulacja częstotliwości, której negatywnym skutkiem są błędy oceny odległości celów, spowodowane efektem Dopplera. W celu ich redukcji autorzy zaproponowali użycie...
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A Model of Thermal Energy Storage According to the Convention of Bond Graphs (BG) and State Equations (SE)
PublicationThe main advantage of the use of the Bond Graphs method and State Equations for modeling energy systems with a complex structure (marine power plants, hybrid vehicles, etc.) is the ability to model the system components of different physical nature using identical theoretical basis. The paper presents a method of modeling thermal energy storage, which is in line with basic BG theory. Critical comments have been put forward concerning...
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Numerical and experimental investigation of thermal convection near electric devices with vertical channels
PublicationThis paper presents the results of numerical and experimental investigation of thermal convection near heat emitting surfaces of an electric device. For the intensification of thermal convection, special vertical channels were formed near the heat emitting surfaces of the device. An experimental test has proved that there is an optimal length of the channels – thermal convection is the most intensive then. Air velocity vectors...
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Analysis of distance measurement errors in CW FM sonar with MLS code modulation
PublicationAlthough used in the classic silent sonar, the CW FM sounding signal has a major flaw which is its inaccuracy in determining the distance to a target. The authors of the article have developed a concept of silent sonar using frequency modulation signals switched by pseudorandom codes, already discussed in their previous work. This article presents a detailed analysis of errors in CW FM sonar with pseudo-random sequence code modulation...