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- Publikacje 2371 wyników po odfiltrowaniu
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Wyniki wyszukiwania dla: road recycling
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Propagacja fali wzdłużnej w pręcie z pęknieciem poprzecznym. Longitudinal wave propagation in a rod with a transverse crack.
PublikacjaW pracy przedstawiono wyniki analizy propagacji fali wzdłuznej w pręcie z pęknięciem poprzecznym.
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Rola niezależnych członków rad nadzorczych w sprawowaniu nadzoru korporacyjnego w spółkach giełdowych w Polsce
PublikacjaOpracowanie składa sie z dwóch części. W pierwszej części przdstawiono problemy nadzoru korporacyjnego i wpływ struktury własności na nadzór korporacyjny. W drugiej części skupiono się na niezaleznych członkach rad nadzorczych, wskazując, że powinni oni być podstawowym instrumentem ochrony interesów akcjonariuszy mniejszościowych w polskich spółkach giełdowych. Zaproponowano zmiany, nie tylko w odniesieniu do kodeksu giełdowego,...
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Thermo-Chemical Decomposition Study of Polyurethane Elastomer Through Glycerolysis Route with Using Crude and Refined Glycerine as a Transesterification Agent
PublikacjaDue to the increasing amount of polyurethane waste, chemical recycling of these materials is a topic of growing interest for many researchers. The primary pur- pose of polyurethane feedstock recycling is to recover the starting polyol. In this study glycerolysis using glycerine from two sources and two purity grades is proposed as a method of chemical recycling. The main effort of this paper focuses on the employment of commercial...
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Polyolefins: from cradle to grave.
Kursy OnlineThe course will consist of lectures followed by discussions. Using the obtained knowledge, students will be asked to work out a plan selecting catalysts, production process and recycling process for a specific type of polyolefin for a selected application.
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SESNED: Dataset for Event-Based Non-Intrusive Load Monitoring Research
Dane BadawczeSescom NILM Energy Dataset (SESNED ) description
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Simulation of ship turning circle test for ballast and full load conditions
Dane BadawczeThe data show the results of the turning circle spiral test for the simplified ship model, taking into account two states of loading: ballast and full load. During the circulation test, the manoeuvrability of the vessel is tested.
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Wpływ azotowania jarzeniowego na niszczenie wodorowe stali przy stałym obciążeniu = Influence of plasma nitriding on steelhydrogen degradation under constant load
PublikacjaPrzedstawiono wyniki badań wpływu warstwy azotowanej jarzeniowo na podatność stali stopowej 34CrAlNi7-10 na niszczenie wodorowe, wyznaczoną w próbie stałego obciążenia w środowisku kwaśnym przy polaryzacji katodowej o gęstości prądu 1 mA/cm2.Określano odporność na pękanie w czasie 200 godz. dla obciążeń równych 0,88-0,96 siły zrywającej.
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Experimental and analytical thermal study of PTFE composite sliding against high carbon steel as a function of the surface roughness, sliding velocity and applied load
PublikacjaThis study investigates the contact temperatures caused by frictional heating of sliding parallel pairs. In this case the materials studied are a PTFE composite in contact with a high carbon steel plate. These materials are commonly used for industrial applications, in particular as the main contacting components within a scroll expander system. The expected contact temperature values are important to be quantified in order to...
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Determination of modifier contents in polymer-modified bitumens and in samples collected from the roads using high performance gel permeation/size exclusion chromatography
PublikacjaThis paper describes application of high performance gel permeation/size exclusion chromatography (HP-GPC/SEC) for the determination of content of polymer modifiers in modified road bitumens. The obtained results were compared with the measurements based on the procedure recommended by the American Association of State Highway and Transportation Officials, which employs Fourier transform mid-infrared spectroscopy (mid-IR FTIR)....
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A CONCEPT OF DETERMINING THE RELATION BETWEEN LOAD AND WEAR OF TRIBOLOGICAL SYSTEMS OF SHIP MAIN SELF-IGNITION ENGINES BY USING PROBABILISTIC APPROACH PROBABILISTIC APPROACH
PublikacjaThis paper presents a proposal of simultaneous consideration of load and wear associated with it , of tribological systems of ship main engines (intended for ship propulsion) . Based on results of investigations it was assumed that both the load Q (i.e. a cause of wear ) and the wear Z (i.e. an effect of load occurrence) considered in a given time t(0 ≤ t ≤ t) are random variables Qt and Zt, respectively. There was characterized...
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Zagrożenia uczestników ruchu drogowego na drogach regionalnych
PublikacjaReferat zawiera analizę bezpieczeństwa ruchu drogowego na sieci dróg wojewódzkich. Przedstawiono poziom bezpieczeństwa na tle całej sieci drogowej oraz charakterystykę poszczególnych województw. Przedstawiono ranking województw ze względu na liczby wypadków i ich ofiar oraz wybrane wskaźniki. Zaprezentowano, jakie są najczęściej występujące rodzaje wypadków na drogach wojewódzkich oraz przedstawiono lokalizację wypadków pod kątem...
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Jacek Rumiński prof. dr hab. inż.
OsobyWykształcenie i kariera zawodowa 2022 2016 2002 1995 1991-1995 Tytuł profesora Habilitacja Doktor nauk technicznych Magister inżynier Prezydent RP, dziedzina nauk inżynieryjno-technicznych, dyscyplina: inzyniera biomedyczna Politechnika Gdańska, Biocybernetyka i inżyniera biomedyczna, tematyka: „Metody wyodrębniania sygnałów i parametrów z różnomodalnych sekwencji obrazów dla potrzeb diagnostyki i wspomagania...
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Enzymy o aktywności aminotransferazy kwasu L-α-aminoadypinowego z Candida albicans - właściwości i rola w metabolizmie komórki grzybowej
PublikacjaCandida albicans jest elementem naturalnej flory drobnoustrojowej człowieka. Podobieństwo komórek grzybowych i ssaczych, wzrost częstości występowania infekcji grzybiczych wraz ze stopniowym wzrostem pojawiania się oporności patogenów stwarza potrzebę poszukiwania nowych związków przeciwgrzybowych. Jedną z dróg obraną przez naukowców jest analiza szlaków biosyntezy aminokwasów egzogennych dla człowieka. Przedmiotem badań w ramach...
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Dehydrogenaza sacharopiny (NADP+, tworząca L-glutaminian) z Candida albicans jako cel molekularny
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alfa-Aminotransferaza kwasu L-alfa-aminoadypinowego z Candida albicans jako cel molekularny
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KONSTRUKCJA AUKSOTROFICZNEGO WZGLĘDEM L-LIZYNY SZCZEPU CANDIDA ALBICANS
PublikacjaEnzymy szlaku kwasu L-α-aminoadypinowego biosyntezy L-lizyny z Candida albicans są potencjalnymi celami molekularnymi w terapii przeciwgrzybowej. Niektóre grupy badawcze wykazały, że auksotrofia wobec L-lizyny u pewnych gatunków grzybów powoduje zmniejszenie ich zjadliwości i może mieć wpływ na wzrost in vivo [Liebmann i in. 2004]. Oznacza to, że można się spodziewać zahamowania wzrostu komórek grzybowych w wyniku działania selektywnych...
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Experimental and numerical analysis of the modified TB32 crash tests of the cable barrier system
PublikacjaRoad restraint systems, including safety barriers, are one of the means used to improve road safety. Currently, they can be allowed to general use after passing the specific crash tests. However, it is always important and desirable to evaluate their performance under various realistic conditions, which can happen on the roads. In this study, the behaviour of the cable barrier system in impact conditions different than assumed...
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Termoplastyczne elastomery poli(estro-uretanowe) otrzymywane z udziałem bio-glikolu poddane dwukrotnemu przetwórstwu
PublikacjaRecykling materiałów polimerowych w istotny sposób wpływa na zmniejszenie ilości odpadów z tworzyw sztucznych składowanych na wysypiskach śmieci. Jedną z metod recyklingu jest recykling mechaniczny, stosowany szczególnie w przypadku materiałów o właściwościach termoplastycznych. W pracy zbadano wpływ dwukrotnego przetwórstwa termoplastycznych elastomerów poli(estro-uretanowych), TPU, otrzymywanych z udziałem bio-glikolu na strukturę...
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On Raman optical activity sign-switching between the ground and excited states leading to an unusual resonance ROA induced chirality
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Risk criteria for sea-going ships arising from the operation of the main engines' crankshaft - conecting rod - piston systems
PublikacjaIn the article the risk criterion for sea-going ships arising from the operation of the main engines' crankshaft - connecting rod - piston systems is proposed. These criterion is based on the procedures recommended in the Formal Safety Assessment method developed under the auspices of International Maritime Organization (IMO). First of all the collective risk criterion for ship has been proposed. In the next step, the share of...
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An innovative method of measuring the extension of the piston rod in hydraulic cylinders, especially large ones used in the shipbuilding and offshore industry
PublikacjaThe article presents the results of selected works related to the wider subject of research conducted at the Faculty of Mechanical Engineering and Shipbuilding at the Gdańsk University of Technology, regarding designing various on board devices with hydraulic drive for ships and other offshore facilities. One of the commonly used these mechanisms are hydraulic actuators with the measurement of the piston rod extension. The issue...
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Permanent traffic counting stations - Expressway S6 in Gdansk (dataset containing 5-min aggregated traffic data and weather information)
Dane BadawczeThe data includes traffic data from permanent traffic count station located on the expressway S6 in the Tri-City Agglomeration area in Poland. The data covers the three year period between 2014 and 2017 and one direction of traffic (southbound).
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Composite GFRP U-shaped footbridge
PublikacjaThe paper presents proposals for the use of glass fiber reinforced polymer composites for the construction of engineering objects, known and commonly used in the shipbuilding industry. An example of a pedestrian footbridge was used in this case, which, despite the considerable thickness of the structural material, was made using infusion technology in one production cycle. The designed and produced footbridge span is durable, dynamically...
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Use of broad-spectrum antibiotics in children diagnosed with multisystem inflammatory syndrome temporarily associated with SARS-CoV-2 infection in Poland: the MOIS-CoR study
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Analiza nośności zabytkowych fundamentów w kontekście jakości użytych zapraw Analysis of the Load-Bearing Capacity of Historical Foundations in the Context of the Quality of Mortar Used
PublikacjaStructures of historical buildings usually have the form of masonry elements. The weakest component of such elements is mortar, especially in stone foundations, which were often used in the with a focus on the modeling of mortar as a joint connecting stones in a characteristic medieval foundation. Different types of mortar: cement, cement-lime, lime and gypsum mortars, were examined. A numerical analysis was carried out on the...
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Janusz Datta prof. dr hab. inż.
OsobyJanusz Datta w roku 1988 ukończył studia na Wydziale Chemicznym Politechniki Gdańskiej. Po ich zakończeniu został zatrudniony na Wydziale Chemicznym w Zakładzie, a potem po reorganizacji, w Katedrze Technologii Polimerów, gdzie przez sześć lat pracował na stanowisku naukowo-technicznym. W tym okresie zdobywał doświadczenie uczestnicząc w licznych wyjazdach do Zakładów Chemicznych „Zachem” Bydgoszcz, gdzie brał udział w pracach...
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Rheological characteristics of oligomeric semiproducts gained via chemical degradation of polyurethane foam using crude glycerin in the presence of different catalysts
PublikacjaPolyurethane (PU) recycling is a topic of growing interest due to the increasing amount of polyurethane waste. The main purpose of polyurethane chemical recycling is to recover the starting polyol. In this study, a method of polyurethane thermochemical recycling, glycerolysis by means of crude glycerin, is proposed. This work presents a comparative study of commercial catalysts used in order to accelerate the decomposition process,...
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Urban & Road Engineering
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The use of recycled semiconductor material in crystalline silicon photovoltaic modules production - A life cycle assessment of environmental impacts
PublikacjaTo offset the negative impact of photovoltaic modules on the environment, it is necessary to introduce a longterm strategy that includes a complete lifecycle assessment of all system components from the production phase through installation and operation to disposal. Recycling of waste products and worn-out systems is an important element of this strategy. As the conclusions from the previous studies have shown, thermal treatment...
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Single-phase product obtained via crude glycerine depolymerisation of polyurethane elastomer: structure characterisation and rheological behaviour
PublikacjaPolyurethane recycling is a topic of growing interest due to the increasing amount of polyurethanewaste. The main purpose of polyurethane feedstock recycling is to recover the starting polyol, a valuable material. In thiswork, amethod of polyurethane thermo-chemical recycling, glycerolysisbymeansof crude glycerine, is proposed. Themaineffort is focusedonthe employment of crude glycerine without purification from biodiesel production...
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Investigation of low-temperature cracks on selected national roads and motorways in Poland 2020
Dane BadawczeThe dataset contains video investigation and records of 68 road sections in various parts of Poland. Videos were recorded with the use of two cameras: 1) mounted in front of measurement vehicle, which was focused on overall view of road and 2) which was focused on pavement surface. The records are categorized according to the ID of the section given...
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Mechanical properties of single V2O5 nanocrystal - nanoindentation measurement in control of the max-load
Dane BadawczeThe DataSet contains the nanoindentation curves (indentation force Fn vs penetrationPd) for a single V2O5 nanocrystal supported on a substrate. The measurements were performed in control of the maximum load of Berkovich indenter force from 2 to 50 mN.
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Urban and Road Engineering - Smolnicki
Kursy OnlineLectures about "Urban and Road Engineering", dedicated to sixth semester of the English-speaking group, will be conducted in a way that activates students. Lectures on Road Engineering cover a wide range of important issues related to the subject, starting from a discussion of the historical circumstances of the creation, development and domination of the contemporary conventional model, through identifying new approaches and...
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2022 Ecological aspects of polymer package recycling
Kursy Online -
2023 Ecological aspects of polymer package recycling
Kursy Online -
Identification of safety hazards and their sources in tram transport
PublikacjaBoth in Poland and in most countries of the European Union, the tram infrastructure is extensively expanding. Contemporary low-floor trams are constructed according to different technical assumptions than typical railway vehicles or high floor trams. In Poland such vehicles rides often on lines designed according to standards developed to the classical vehicles. At the same time, the intensity of road traffic and the number of...
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The Influence of Cement Type on Early Properties of Cold In-Place Recycled Mixtures
PublikacjaCold in-place recycling is a commonly used maintenance treatment in rehabilitation of low and medium volume roads in Poland. Typically, two types of binding agents are used—cement and bituminous emulsion (or foamed bitumen).Due to the harsh Polish climate with many freeze/thaw cycles and frequent occurrence of saturated conditions, the used amounts of cement are higher than those commonly used in warmer parts of Europe. While there...
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Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on polyvinyl coating using 2-wire probe sample 1
Dane BadawczeThe dataset presents impedance spectrum of polyvinyl coating (code-name PW_2_2_1) sample 1. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174. The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...
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Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on polyvinyl coating using 2-wire probe sample 2
Dane BadawczeThe dataset presents impedance spectrum of polyvinyl coating (code-name PW_2_2_1) sample 2. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174. The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...
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Rigid Finite Element Modeling for Identification of Vibrations in Elastic in Elastic Rod Driven by a DC-motor Suplied from a Thyristor Rectifier
PublikacjaRozdział dotyczy analizy numerycznej układu elektromechanicznego. Układ składa się z silnika zasilanego z jednopołówkowego prostownika tysystorowego i napędzanego tym silnikiem wirującego pręta. Celem obliczeń jest określenie postaci i wielkości drgań pręta, jeśli uwzględniamy jego elastyczność. Dyskretna struktura modelu to łańcuch wielomasowy ciał - sztywnych ciał połączonych bezmasowymi węzłami. Autorzy obliczyli zachowanie...
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Gospodarka zużytymi modułami fotowoltaicznymi
PublikacjaFotowoltaika rozwija się na całym świecie niezwykle intensywnie od wielu lat, oferując energię elektryczną wytworzoną w technologii, pozbawionej wszelkich emisji. Wraz z rosnącym wykorzystaniem instalacji fotowoltaicznych do konwersji energii promieniowania słonecznego na energię elektryczną coraz większego znaczenia nabiera problem zagospodarowania odpadów, powstałych podczas produkcji, eksploatacji i po zakończeniu użytkowania...
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Assessing Roadside Hybrid Energy Absorbers Using the Example of SafeEnd
PublikacjaA combination of crash cushion and end-terminal, hybrid energy absorbing devices have been in use worldwide for a few years already. They include SafeEnd, a system Poland has recently introduced. Some road authorities have raised concerns as regards the operating conditions of the devices and how they work together with safety barriers. The objective of this research is to clarify the concerns and answer the following questions:...
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Analysis of factors influencing the density of fatalities on national roads in poland = Analiza czynników wpływających na gęstość ofiar śmiertelnych na drogach krajowych w Polsce
PublikacjaW referacie przedstawiono doświadczenia innych krajów i wstępne wyniki badań wpływu wybranych czynników na gęstość i liczbę ofiar śmiertelnych wypadków drogowych na drogach krajowych w Polsce.
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A model of fuel combustion process in the marine reciprocating engine work space taking into account load and wear of crankshaft-piston assembly and the theory of semi-Markov processes
PublikacjaThe ar ticle analyses the operation of reciprocal internal combu stion engines, with mar ine engines u sed a s an example. The analysis takes into account types of energy conversion in the work spaces (cylinders) of these engines, loads of their crankshaft-piston assemblies, and types of fuel combustion which can take place in these spaces during engine operation. It is highlighted that the analysed time-dependent loads of marine...
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Development of the New Polish Method for Capacity Analysis of Motorways and Expressways
PublikacjaThe paper presents development of the new Polish method for performing capacity analysis of basic segments of dual carriageway roads (motorways and expressways). The method is based on field traffic surveys conducted at 30 motorway and expressway sites (class A and S roads) in Poland. Traffic flows, composition and travel times were observed in 15-min intervals at each site using ANPR filming method. These data were used to calibrate...
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A Proposed Machine Learning Model for Forecasting Impact of Traffic-Induced Vibrations on Buildings
PublikacjaTraffic-induced vibrations may cause various damages to buildings located near the road, including cracking of plaster, cracks in load-bearing elements or even collapse of the whole structure. Measurements of vibrations of real buildings are costly and laborious. Therefore the aim of the research is to propose the original numerical algorithm which allows us to predict, with high probability, the nega-tive dynamic impact of traffic-induced...
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Naprawa przegubów Estakady Kwiatkowskiego w Gdyni = Hinges repair og the E. Kwiatkowskiego trestle bridge in Gdynia
PublikacjaE. Kwiatkowskiego trestle bridge is one of the main parts of road infrastructure that connects sea transport (container terminal BTC) national roads A1,1,7. Every limitation of motor traffic causes many problems for Gdynia inhabitants and moreover economical loss in transport economy. In recent two years there were expertise and repair project of hinges carried out. Paper presents genesis and reasons of hinges damages, theoretical...
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Evaluation of the electrochemical performance of CPMD in ZICs with 3M ZnSO4 electrolyte
Dane BadawczeThese data contain the results of the electrochemical performance measurements of CPMD in ZICs with 3M ZnSO4 electrolyte, incl. CGD (galvanostatic charge-discharge ) curve and cycling stability of CPMD. Sample abbreviations (CPMD) are in agreement with the markings used in the linked publication.
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Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on epoxy based coating using 2-wire probe sample 2
Dane BadawczeThe dataset presents impedance spectrum of epoxy based coating (code-name B2_B3) sample 2. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174. The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...
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Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on epoxy based coating using 2-wire probe sample 1
Dane BadawczeThe dataset presents impedance spectrum of epoxy based coating (code-name B2_B3) sample 1. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174. The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...