Filtry
wszystkich: 857
-
Katalog
Wyniki wyszukiwania dla: BADANIA I ROZWÓJ
-
Jan Stąsiek prof. dr hab. inż.
Osoby -
Jan Hupka prof. dr hab. inż.
Osoby -
Determining the noise impact on hearing using psychoacoustical noise dosimeter
PublikacjaThis research study presents the designed noise dosimeter based on psychoacoustical properties of the human hearing system and, at the same time. evaluation of time and frequency characteristics of noise. The designed noise dosimeter enables assessing temporary threshold shift (TTS) in critical hands in real time. In this way it is possible monitoring the hearing threshold shift continuously for people who stay in the harmful noise...
-
THE PANTOGRAPH AND ITS GEOMETRIC TRANSFORMATIONS - A FORMER POPULAR TOOL FOR COPYING AND SCALING
PublikacjaDevelopment of digital technology has resulted in significant transformations of designer workshops. Computer applications replaced the previously existing tools and methods for drawing up of projects. Professional, sophisticated drawing instruments and tools for manual plotting, as well as basic drawing aids, have gradually fallen into oblivion and become relicts of a bygone era - the objects of collectors' interest. Gdansk University...
-
Effect of illumination on noise of silicon solar cells
PublikacjaTransport and noise properties of silicon solar cells in darkness and under illumination have been studied. The measurements were carried out for both reverse and forward bias of the device. The changes in the sample behaviour are due to the variation of PN junction dynamic resistance and, also, the occurence of both 1/f and generation-recombination noise components
-
Does source matter? Generation of investment expenditures by different types of local government revenues
PublikacjaThe purpose of the article was to investigate the impact of the three fundamental statutory categories of budget revenues, i.e. own revenues, general subsidies and specific grants on the size of investments made by local government units in Poland. The subject scope included the local government subsector in its entirety, as well as divided into 4 groups: communes (gminas), cities with powiat rights, districts (powiats) and province...
-
CHALK & TALK OR SWIPE & SKYPE?
PublikacjaTechnology in classroom is a matter of heated discussions in the field of education development, especially when multidisciplinary education goes along with language skills. Engineers’ education requires theoretical and practical knowledge. Moreover, dedicated computer skills become crucial for both young graduates and experienced educators on the labor market. Teaching online with or without using different Learning Management...
-
The influence of road surface unevenness on tyre rolling resistance
PublikacjaThe geometric characteristics of road surface substantially affect the interaction between tyre and road. Depending on pavement texture wavelength, the texture chiefly affects tyre/road friction, rolling resistance, interior and exterior noise, tyre wear, and ride comfort. The article presents results of investigations on the influence of road surface unevenness on the rolling resistance of passenger car and truck tyres. The tests...
-
MEASURE OF THE LEVEL OF SOCIO-ECONOMIC DEVELOPMENT IN PROVINCES
PublikacjaThe scope of Polish macro-economic data for assessing the level of socio-economic development of the country is largely limited because of the regional variation. Therefore there is a need for cyclic selection and the verification of criteria which allow identifying regions with a similar level of socio-economic development or those that clearly differ from the mean values. The aim of the study is to compare Poland’s provinces...
-
Performance Analysis of Developed Multimodal Biometric Identity Verification System
PublikacjaThe bank client identity verification system developed in the course of the IDENT project is presented. The total number of five biometric modalities including: dynamic handwritten signature proofing, voice recognition, face image verification, face contour extraction and hand blood vessels distribution comparison have been developed and studied. The experimental data were acquired employing multiple biometric sensors installed...
-
Krzysztof Nowicki dr inż.
Osoby -
Voltage and frequency regulation of a standalone induction generator by reduced-rating power electronic compensators - comparative evaluation
PublikacjaIn this paper are considered two fundamental topologies of power electronic compensators for voltage and frequency control of a standalone self-excited induction generator (IG) system. These are voltage and current source inverter based shunt compensators with energy storage. The aim of this study is to assess main features of both topologies in dynamic and steady-state IG operation. The whole system is modelled with the aid of...
-
Kapitał marki miasta Gdańska - ujęcie marketingowe
PublikacjaKapitał marki miasta obejmuje zestaw jego unikalnych cech, które umożliwiają rywalizowanie o potencjalnych klientów: mieszkańców, turystów, studentów czy też inwestorów. Niniejszy rozdział dotyczy problematyki czynników kształtujących markę miasta Gdańsk określonych na podstawie wyników badania jakościowego. Zostało ono przeprowadzone w formie wywiadu z ekspertami zajmującymi się zawodowo kreowaniem marki miast. Wyboru respondentów...
-
EFFECT OF SURFACE STATE AND STRESS ON AN OXIDATION OF THE ZIRCALOY-2 ALLOY
PublikacjaZr alloys are widely used as materials for nuclear fuel pellets in the nuclear industry. In the case of the LOCA or RIA happen, a temperature may locally reach high values. Even if the high temperature maintains shortly, the zirconium oxides may become permeable, absorb hydrogen appearing in cooling water from decomposition reaction and crack because of formation and brittle failure of hydrides. Such model cannot so far take into...
-
Wpływ kompensatorów energoelektronicznych zainstalowanych w określonych punktach KSE na awarię napięciową
PublikacjaArtykuł prezentuje wyniki badań modelowych mających na celu analizy zachowania się różnego rodzaju kompensatorów statycznych FACTS w systemie elektroenergetycznym. Podstawowym stanem, który analizowano, było zachowanie się kompensatorów zainstalowanych w wybranych węzłach systemu w czasie awarii napięciowej. W artykule zaprezentowano wybrane wyniki przeprowadzonych badań w ramach realizacji pracy pt. ''Badania wpływu kompensatorów...
-
In Search of Naval Beauty. Historical Study of Ship Architecture
PublikacjaDesigning ships is no mean achievement. In the old days, constructors focused on making their ships visually appealing, while paying scant regard to the living conditions of the crew. Such an approach reflected the state of the art in ship building at the time as well as the social order prevalent in those days. A breakthrough came no earlier than at the turn of the 19th / 20th centuries. The industrial revolution brought along...
-
Natural convective heat transfer from isothermal cuboids
PublikacjaThe paper presents results of theoretical and experimental investigations of the convective heat transfer from isothermal cuboid. The analytical solution was performed taking into account complete boundary layer length and the manner of its propagation around isothermal cuboid. It arises at horizontal bottom surface and grows on vertical lateral surface of the block. After changing its direction, the boundary layer occurs above...
-
A decade of Poland`s integrated Road Safety Programme - economic develop-ment vs. road unsafety. W: [CD-ROM]. Conference proceedings. SORIC´02. 2nd Safety on Road Internationaload International Conference. Kingdom of Bah- rain, 21-23 October 2002. Bahrain: CTRS Univ. Bahrain**2002 [8 s. 5 rys. bibliogr. 5 poz. 10 lat Krajowego Programu Bezpieczeństwa Ruchu Drogowego w Polsce - rozwój ekonomiczny a niebezpieczeństwo ruchu.
PublikacjaReferat zawiera analizę doświadczeń z dziesięciu lat pracy oraz wdrożeń Kra-jowego Programu Bezpieczeństwa Ruchu Drogowego GAMBIT. Przedstawia również analizę przyczyn gwałtownego spadku liczby- śmiertelnych ofiar wypadków dro-gowych w Polsce w roku 2001.
-
Lamb wave-based monitoring of shear failure of an adhesive lap joint
PublikacjaThe paper presents a study on the elastic wave propagation in adhesive joints of steel plates subjected to tensile loading. A single lap joint was chosen for analysis because of its simplicity and plurality of applications. Experimental investigations consisted of the uniaxial extension of prepared specimens. Force and displacement values were recorded by a testing machine. Simultaneously, guided Lamb waves were excited and signals...
-
Digital Innovations and Smart Solutions for Society And Economy: Pros and Cons
PublikacjaRecent developments in artificial intelligence (AI) may involve significant potential threats to personal data privacy, national security, and social and economic stability. AI-based solutions are often promoted as “intelligent” or “smart” because they are autonomous in optimizing various processes. Be-cause they can modify their behavior without human supervision by analyzing data from the environ-ment, AI-based systems may be...
-
The New 3D Printed Left Atrial Appendage Closure with a Novel Holdfast Device: A Pre-Clinical Feasibility Animal Study
PublikacjaMany patients undergoing cardiac surgery have risk factors for both atrial fibrillation and stroke. The left atrial appendage (LAA) is the primary site for thrombi formation. Therefore LAA occlusion devices should be tested for their ability to reduce future cerebral ischemic events in patients with high-risk of haemorrhage. The aim of this study was to evaluate the safety and feasibility of a novel left atrial appendage exclusion...
-
Integration of a Multilevel Transport System Model into Sustainable Urban Mobility Planning
PublikacjaWhen planning their transport policy, cities usually focus on developing sustainable transport systems and reducing the negative consequences of transport. One way to deliver transport policies is to use the Sustainable Urban Mobility Plan (SUMP), a strategic document designed to meet the demand for mobility whilst ensuring adequate quality of life for the residents. The process of Sustainable Urban Mobility Planning (SUMP process)...
-
Analysis of leakage flux in deenergized transformer
PublikacjaThe article presents the numerical analysis of the magnetic field that occurs around the transformer after it has been switched off. The purpose of this analysis was to determine if it is possible to define the residual fluxes in the legs of transformer based on the measurements of this field. These studies have allowed us to determine the quantity and location of the sensors. The influence of the Earth's magnetic field has also...
-
Determining an Architectural Character for Durban Residential Streetscapes
PublikacjaIn the current global context and in consideration of the Sustainable Development Goals, there is a strong need for urban densification. However, this development is also driven by processes linked to the idea of capitalism and 'economic growth'. Such development often leads to the loss of the 'genius loci' of a place and sometimes even overlooks the fact that the quality of the built environment greatly influences the health and...
-
Magdalena Popowska dr
OsobyAbsolwentka Uniwersytetu im Adama Mickiewicza w Poznaniu oraz Ecole Supérieure de Commerce w Rouen. Pracownik badawczo dydaktyczny, autorka i recenzentka wielu artykułów publikowanych w czasopismach krajowych i międzynarodowych. Przez wiele lat odpowiedzialna za procesy internacjonalizacji, w latach 2008-2016 jako prodziekan ds. międzynarodowych i publicznych, a 2016-2020 jako pełnomocnik dziekana ds. współpracy międzynarodowej....
-
Experimental investigations of damage evolution in concrete during bending by continuous micro-CT scanning
PublikacjaThe paper describes experimental investigation results of fracture in notched concrete beams under quasi-static three-point bending. To visualize 3D fracture in concrete under bending, an extended X-ray micro-computed tomography system was used, i.e. the tomography system SkyScan 1173 was connected to the loading machine ISTRON 5569. This combined system enabled to shot images of deforming concrete beams during a continuous deformation...
-
Anterior subcutaneous transposition and simple decompression of the ulnar nerve at the elbow – the postoperative improvement in DASH score, VAS score and sonographic findings
PublikacjaIntroduction. Although a lot of studies have described long- term outcomes after surgical treatment of cubital tunnel syndrome, and the usefulness of sonography in diagnosing of this disorder, few studies have evaluated patients self-reporting outcomes or sonographic findings after surgery. Aim. We assessed patients self-reporting instruments and sonographic findings in patients with the cubital tunnel syndrome before and after...
-
Nadzorowanie stanu dynamicznego podczas frezowania szybkościowego smukłymi narzędziami.
PublikacjaOpisano proces nadzorowania drgań wirujących narzędzi w nowoczesnych obrabiarkach. Przedmiotem rozważań jest proces wirowania szybkościowego smukłym frezem kulistym. Zjawiskiem dynamicznym o istotnym znaczeniu są drgania względne narzędzie-przedmiot obrabiany, których rozwój, przy określonych warunkach, może doprowadzić do utraty stabilności oraz wystąpienia drgań samowzbudnych typu chatter. Rezultaty zmodyfikowanej metody nadzorowania...
-
Problems of collisions between adjacent steel structures under earthquake excitation
PublikacjaNowadays, the high level of urbanization forces the designers to design closely-separated structures and to take into account many factors influencing the response of these structures, which may collide due to insufficient separation distance during moderate to strong ground motions. Recent observations as well as numerical and experimental investigations have confirmed that the interactions between structures may lead to significant...
-
Experimental bases for the rail track surface damage detection system
PublikacjaA diagnosis of rail surface is generally based on the classical method of direct assessment and track geometry measurements. Identification and qualification of inequality and damage on the surface rails is depend on the skills and experience person who conducting inspection. In times of increasing exploitation of railways, infrastructure managers decide to use systems supporting the assessment of technical condition of the railways....
-
Przewidywanie zmian krajobrazowych w gospodarowaniu przestrzenią : z wykorzystaniem ocen oddziaływania na środowisko na przykładzie transportu drogowego
PublikacjaPraca dotyczy prognozowania skutków pojawiających się w krajobrazie w wyniku złożonych procesów gospodarowania przestrzenią. Temat uznano za ważny i aktualny, gdyż wiedza na temat charakteru, wielkości i znaczenia zmian krajobrazowych jest podstawą dla właściwej ochrony i kształtowania krajobrazu, poddawanego nieustannej i silnej presji inwestycyjnej. Niska skuteczność systemu planowania przestrzennego, odpowiedzialnego za zrównoważony...
-
The Possibility to use a Nuclear Power Plant as a Source of Electrical Energy and Heat
PublikacjaIn this article issues concernig the possibility of nuclear power plant (NPP) operation also as a source of heat, which means combined heat and power production, have been described. CHP work is possible and profitable only in those areas where high thermal power demand occurs, which means near city agglomerations such as Warsaw or the Tri-City. Two levels of thermal power delivered to the heating system have been considered. Preliminary...
-
A Surveillance Of Dynamic Processes in Selected Mechatronic Systems
PublikacjaThe paper concerns development of original method of optimal control at energy performance index and its application to dynamic processes surveillance of some mechatronic systems. The latter concerns chatter vibration surveillance during highspeed slender milling of rigid details, as well as motion control of two-wheeled mobile platform. Results of on-line computer simulations and real performance on the target objects reflect...
-
Możliwości zastosowania urządzenia ultradźwiękowego w aspekcie zabiegów chirurgicznych.
PublikacjaPrezentujemy nowe badania w zakresie możliwości zastosowania alternatywnych urządzeń w aspekcie chirurgicznego cięcia tkanki kostnej w obrębie jamy ustnej. Dotychczasowo powszechnie stosowane urządzenia mechaniczno-obrotowe mają wiele wad: łatwość przegrzania tkanki kostnej, częste uszkodzenia tkanek miękkich okolicy operowanej oraz nierówne brzegi kostne podczas cięcia. Dynamiczny rozwój nauk technicznych pozwolił na wprowadzenie...
-
The role of organic and mineral constituents on kerogen transformation ratio
PublikacjaThe main aim of this dissertation is to determine the role of mineral and organic matter constituents in kerogen transformation ratio. Practical aspects of the work include application of the results in the assessment of hydrocarbon production potential; to make process of hydrocarbon recovery more predictable consistent and efficient. The work used shale from the Vaca Muerta formation from the Nequen basin in Argentina. The formation...
-
Znaczenie płci w procesie zakupu marek własnych sieci handlowych – analiza wielogrupowa
PublikacjaThe purpose of the article is to analyze the differences in the behavior of men and women in the process of purchasing store brands (SBs). Using an established conceptual model, we intended to identify differences, depending on gender of buyers, in the size of the effects of store image and brand price-image on perceived risk and subsequently on store brand purchase intention. A total of 652 respondents participated in the study....
-
Effect of the Post-Weld Surface Condition on the Corrosion Resistance of Austenitic Stainless Steel AISI 304
PublikacjaSurfaces of welded elements made of corrosion-resistant (stainless) steels develop temper colours. The removal of thickened oxide layers off steels exposed to temperatures below 300°C is necessary and entails the restoring of high corrosion resistance of the stainless steel. The article presents tests concerned with the effect of a method applied to remove post-weld temper on the corrosion resistance of austenitic stainless steel...
-
PROBLEMS WITH CORROSION PROTECTION STEEL STACKS IN FGD SYSTEMS
PublikacjaThis paper presents problems associated with corrosion of steel stacks and changes in philosophy of corrosion protection when implemented into flue gas desulphurization systems. In-situ tests were taken by means of electrochemical impedance spectroscopy at a stack which discharges flue gas before wet lime/limestone desulphurization. A very rapid soaking of spherical infill vinylester coating with electrolyte has been observed....
-
ATTEMPT AT EVALUATING THE INFLUENCE OF BENDING STRESS ON SHAFT WEAR PROCESSES IN WATER LUBRICATED SLIDING BEARING WITH A RUBBER BUSHING
PublikacjaWater lubricated bearings find increasingly wide application in shipbuilding or hydro–power industry, the popularity stemming from their numerous advantages. Unfortunately, as it turns out, water lubricated bearings do not always meet expectations, as on occasion they become subject to intense, premature wear which requires costly repair. One of the still unexplained phenomena is the process of excessive bearing wear, in particular...
-
Paweł Bykowski dr
Osoby -
CFFT columns in road through railroad crossings
PublikacjaThere were 12801 road through railroad one-level crossings in Poland in 2018. 215 accidents happened at them in 2018. In order to increase safety in rail and road traffic two-level crossings should be used. They are definitely safer and make the traffic more smooth. In the design and construction of two-level intersections of railway and road or path columns of circular cross-section are often used. They can be successfully replaced...
-
Mariusz Figurski prof. dr hab. inż.
OsobyDyrektor Centrum Modelowania Meteorologicznego Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy. Urodził się 27 kwietnia 1964 roku w Łasinie. Egzamin maturalny złożył w 1983 roku po ukończeniu II Liceum Ogólnokształcącego im. Jana III Sobieskiego w Grudziądzu, Studia wyższe w trybie indywidualnym ukończył w 1989 (10.07.1989) na Wydziałach Elektromechanicznym i Inżynierii Lądowej i Geodezji Wojskowej Akademii...
-
Electrochemical investigations on corosivity of de-icing liquids for railway infrastructure
PublikacjaThe paper presents the results of electrochemical tests of the de-icing fluid for railway infrastructure. DC and AC electrochemical tests were performed to determine the corrosion rates of structural steel, cast iron and aluminium in the newly produced fluid. The results were compared with the corrosion rates of the same materials in the fluid without corrosion inhibitors. The obtained test results indicate a low corrosion risk...
-
Sundials of St Mary’s Church in Gdańsk / Zegary słoneczne kościoła pw. Wniebowzięcia Najświętszej Panny Marii w Gdańsku
PublikacjaThe paper presents contemporary research evidence of form, function and history of the sundials of St Mary’s Church in Gdańsk. The discussed sundials are located on the southern wall of the church transept. The sundial, which is believed to be made by Lorenzo Zachau in 1533, is placed on the west side of the western window, at the edge of the wall. The face of this sundial is separated by a horizontal line into two parts. The upper...
-
PROBLEMS OF COLLISIONS BETWEEN ADJACENT STEEL STRUCTURES UNDER EARTHQUAKE EXCITATION
PublikacjaNowadays, the high level of urbanization forces the engineers to design closely-separated structures and to take into account many factors influencing their response, including collisions between them due to insufficient separation distance during moderate to strong ground motions. Recent observations as well as experimental and numerical investigations have confirmed that interactions...
-
Usefulness of the voltamperometric method for assessment of the purity of soil
PublikacjaThis paper presents a voltammetric analysis of soil. It shows that the voltammetry is a useful method for the assessment of soil contaminated with heavy metal ions. There are two major problems with voltammetry analysis: the diffusion coefficient and the measurement system. The paper contains a short literature study of mathematical equations and a study of differences between soil and water measurements. Suggestions of the solution...
-
Nanoindentation tests titanium alloy Ti-6Al-4V after interference laser treatment
PublikacjaThe study aimed was to assess selected mechanical properties of surface layers obtained after interference laser treatment – DLIL of titanium alloy Ti-6Al-4V used for implants. The samples were melted in still air at room temperature, for this purpose Nd:YAG laser was used, the number of laser shots was variable. Next, nanoindentation tests were performed, based on which Young’s modulus and nanohardness in the obtained surface...
-
Monika Badecka-Kozikowska dr
Osoby -
Evaluating the mobile robot positions using accelerometer data
PublikacjaThis paper analyzes the problem of determining the position of a robot using an accelerometer, which is an essential part of inertial measurement units (IMU). The information gained from such a gauge, however, requires double integration of sensor data. To assure an expected effect, a mathematical model of a low-cost accelerometer of the MEMS type is derived. Moreover, in order to improve the performance of positioning based on...
-
Zasilanie ruchomych odbiorników energii elektrycznej za pośrednictwem cewek powietrznych sprzężonych magnetycznie.
PublikacjaDla odbiorcy energii najpowszechniej akceptowaną jej formą jest energia elektryczna. Jej przetwarzanie na inne formy odbywa się we współczesnych urządzeniach odbiorczych najczęściej z bardzo dużą sprawnością. Potocznie rozumie się, że dla jej przesyłu konieczne są tory prądowe wykonane z materiałów charakteryzujących się, w normalnych warunkach, dużą przewodnością elektryczną, czyli na drodze bezpośrednich połączeń galwanicznych...