Filters
total: 2324
-
Catalog
displaying 1000 best results Help
Search results for: pixel shader
-
Stereo vision with Equal Baseline Multiple Camera Set (EBMCS) for obtaining depth maps of plants
PublicationThis paper presents a method of improving the estimation of distances between an autonomous harvesting robot and plants with ripe fruits by using the vision system based on five cameras. The system is called Equal Baseline Multiple Camera Set (EBMCS). EBMCS has some features of a camera matrix and a camera array. EBMCS is regarded as a set of stereo cameras for estimating distances by obtaining disparity maps and depth maps. This...
-
Respiratory Rate Estimation Based on Detected Mask Area in Thermal Images
PublicationThe popularity of non-contact methods of measuring vital signs, particularly respiratory rate, has increased during the SARS-COV-2 pandemic. Breathing parameters can be estimated by analysis of temperature changes observed in thermal images of nostrils or mouth regions. However, wearing virus-protection face masks prevents direct detection of such face regions. In this work, we propose to use an automatic mask detection approach...
-
Quality Analysis of Audio-Video Transmission in an OFDM-Based Communication System
PublicationApplication of a reliable audio-video communication system, brings many advantages. With the spoken word we can exchange ideas, provide descriptive information, as well as aid to another person. With the availability of visual information one can monitor the surrounding, working environment, etc. As the amount of available bandwidth continues to shrink, researchers focus on novel types of transmission. Currently, orthogonal frequency...
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [11290630017292111]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [3300730069457891]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [11290630017291451]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [11290630017294351]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [11290630017293021]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Waldenstrom macroglobulinemia - Female, 50 - Tissue image [11290630017297561]
Open Research DataThis is the histopathological image of HEMATOPOIETIC AND RETICULOENDOTHELIAL SYSTEMS tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
-
Paweł Wierzba dr hab. inż.
PeopleDr Paweł Wierzba, E.E. M.Sc. E.E. received from WETI PG 1994 PhD in optoelectronics (with honours) from WETI PG 2001 Research Stays at VTT Technical Research Centre of Finland from 1997 to 2000 Finnish Academy Scholarship at VTT Technical Research Centre of Finland (12 months) 2002-3 Research interest area covers optical and optical fiber meaurement methods, technology of selected ceramic and liquid crystalline materials relevant...
-
The structure of the enterprise sector by size in Poland and the EU-28 in 2017
Open Research DataThe majority (99.8%) of companies in the EU countries are micro, small and medium-sized enterprises - see chart. The situation is similar in Poland, but the structure of the SME sector is slightly different from that observed in the EU. In Poland, the share of micro-enterprises in the total number of enterprises is higher than in the EU countries (95.5%...
-
The use of nitriding as a prevention method against hydrogen degradation of high-strength steels
PublicationPrzedstawiono badania wpływu warstw azotowanych jarzeniowo na stali 34CrAlNi7-10 na jej podatność na niszczenie wodorowe. Wytworzono warstwy azotowane w atmosferach technologicznych o różnym udziale wodoru. Próbki materiału rodzimego i z warstwami azotowanymi poddano próbie rozciągania z małą prędkością odkształcania w środowisku 0,01 N kwasu siarkowego przy polaryzcaji katodowej. Względny spadek plastyczności i charakter przełomu...
-
Influence of heat transformations on microstructure and properties of some wrought aluminium alloys.
PublicationOmówiono wpływ spawania na podatność do korozji naprężeniowej stopów Al-Mg i Al-Zn-Mg stwierdzając, że wzrost zawartości cynku wywołuje wzrost właściwości mechanicznych i spadek odporności na korozję naprężeniową. Wykazano, że obróbka cieplna złożona z retrogresji i powtórnego starzenia w przypadku stopów Al-Zn-Mg nie powoduje szczególnych zmian odporności na korozję naprężeniową, co pozostaje w związku z niewielką zmianą struktur...
-
Identification of dynamic parameters in the context of diagnostics of steel tank with different level of liquid.
PublicationThe paper presents an experimental study to identify the dynamic parameters of a water-filled tank model. The experimental modal analysis approach involving the excitation at one point of the structure and acquisition of vibra tions at selected points distri buted over the tank surface allowed to determine the resonance frequencies, mode shapes and damping ratios. The main aim of the research was to examine the influence of...
-
Effectiveness of the robust PSS design
PublicationThe paper discusses optimal PSS of synchronous generator synthesis. The optimal controller is an Hinf controller, what means that minimises Hinf norm of transfer function between the exogenous signals such as reference inputs and disturbances, and the error signals which are to be minimised to meet the control objective. The dynamic properties of the plant are shaped by choosing appropriate weighting function applied to the plant...
-
Tribological performance of PTFE-metal binary coatings in rolling/sliding contact
PublicationTribological performance of surface coatings with embedded PTFE reservoirs in rolling/sliding contact is reported. Using two different coating materials and two shapes and patterns of PTFE reservoirs test samples in the form of discs were prepared and tested in a four-ball contact configuration under loads corresponding to nominal contact pressure of 0.5 and 1.0 GPa. It was found that one coating, namely aluminium-bronze with embedded...
-
Resonance microstrip structure with patch of arbitrary convex geometry with the use of field matching technique
PublicationAn analysis of the resonance frequency problem of planar microstrip structure with patch of arbitrary convex geometry is presented. A full-wave analysis is employed utilizing a combination of Galerkin’s moment method and field matching technique. In this approach, a field matching technique is adopted to calculate the patch surface current densities, and next the method of moments is utilized to calculate resonance frequencies...
-
Badanie solubilizacji mieszanin weglowodorów jako jednego z mechanizmów remediacji zaolejonych gruntów
PublicationPrzeprowadzono badania solubilizacji mieszanin węglowodorów (dekan, dodekan, tetradekan, heksadekan; oktan, oktadekan; dodekan, toluen) w wodnych roztworach micelarnych surfaktantów niejonowych (Rokanol NL6, Triton BG10, AG 6210) oraz ich mieszanin. Solubilizacja najbardziej efektywnie zachodziła w roztworach Rokanolu NL6. Zaobserwowano dwukrotny spadek efektywności procesu solubilizacji wraz ze wzrostem długości łańcucha węglowodoru...
-
Skarby Menonitów - polsko-holenderskie warsztaty naukowe
PublicationSkarby Menonitów - polsko-holenderskie warsztaty naukowe- sprawozdanie z badań terenowych. Przedstawienie tematyki i zakresu polsko-holenderskich warsztatów naukowych dotyczących dziedzictwa kulturowego Żuław. Warsztaty SKARB MENONITÓW przeprowadzone w ramach międzynarodowych badań naukowych od 22 do 27 września 2008 roku w gminie Cedry Wielkie przy współpracy Wydziału Architektury Politechniki , National Service for Archeology,...
-
Calculation of Resonance in Planar and Cylindrical Microstrip Structures Using a Hybrid Technique
PublicationA hybrid technique was employed for the analysis of the resonance frequency of thin planar and cylindrical microstrip structures with the patches of arbitrary geometry. The proposed technique utilizes a combination of Galerkin’s moment method and a finite-element method (FEM). In this approach, an FEM is adopted to calculate the patch surface current densities, and a method of moments is utilized to calculate the resonance frequencies...
-
Special Issue "Applications of Finite Element Modeling for Mechanical and Mechatronic Systems"
PublicationNumerical modeling is very important in today's engineering because, among other things, it reduces the costs associated with prototyping or predicting the occurrence of potentially dangerous situations during operation in certain defined conditions. Different methods have so far been used to implement the real structure into the numerical version. The most popular have been variations of the finite element method (FEM). The aim...
-
3D Model Preparing Patterns for Interactive Urban Visualization - Guidelines for Graphic Designers Preparing 3D Models for Virtual Reality Applications
PublicationWhile working on architectural visualizations, the software developer often has to work with graphic designers who create models in a different environment what can cause many complications. For this reason, it is very important to have some guidelines which can protect both the developer and the designer from commixing mistakes. The paper presents a list of such guidelines based on the authors’ experience. The reader can treat...
-
Właściwości solubilizujące i emulgujące surfaktantów niejonowych w kontekście remediacji gruntów
PublicationNiejonowe związki powierzchniowo czynne mogą być wykorzystane do usuwania hydrofobowych zanieczyszczeń organicznych z gleby dzięki zdolnościom do solubilizowania i emulgowania. Zbadano solubilizację micelarną i emulgowanie tetrachloroetylenu i dodekanu w roztworach oksyetylenowanych alkoholi tłuszczowych oraz oksyetylenowanych alkilofenoli. Obserwowano spadek efektywności solubilizacji obu zanieczyszczeń ze wzrostem HLB surfaktantu....
-
Effect of plasma nitrided layers on low-alloy steel on its hydrogen degradation
PublicationPrzedstawiono badania wpływu warstw azotowanych jarzeniowo na stali 34CrAlNi7-10 na jej podatność na niszczenie wodorowe. Wytworzono warstwy azotowane w atmosferach technologicznych o różnym udziale wodoru. Próbki materiału rodzimego i z warstwami azotowanymi poddano próbie rozciągania z małą prędkością odkształcania w środowisku 0,01 N kwasu siarkowego przy polaryzcaji katodowej. Względny spadek plastyczności i charakter przełomu...
-
Driving forces of informal employment: An empirical study based on Polish enterprise data
PublicationObjective: The article aims to indicate the determinants of informal employment in registered enterprises using company-level evidence from Poland. Research Design & Methods: The survey conducted among Polish small and medium-sized (SME) enterprises in 2018 was used to find the driving forces of informal employment in Poland. The adequate sample comprised 952 representative surveys derived from the computer-assisted telephone...
-
eFRADIR: An Enhanced FRAmework for DIsaster Resilience
PublicationThis paper focuses on how to increase the availability of a backbone network with minimal cost. In particular, the new framework focuses on resilience against natural disasters and is an evolution of the FRADIR/FRADIR-II framework. It targets three different directions, namely: network planning, failure modeling, and survivable routing. The steady state network planning is tackled by upgrading a sub-network (a set of links termed...
-
Design of compact self-quintuplexing antenna with high-isolation for penta-band applications
PublicationThis article presents a novel compact self-quintuplexing antenna architecture based on a substrate-integrated rectangular cavity (SIRC) for pentaband applications. The proposed self-quintuplexing antenna is constructed by employing an SIRC, one Pi-shaped slot (PSS), one T-shaped slot (TSS), and five 50Ω microstrip feedlines. The PSS and TSS are engraved on the top of the SIRC to create five radiating patches, which are excited...
-
Entrepreneurial competencies and intentions among students of technical universities
PublicationThe study investigates the entrepreneurial competencies and intentions of students. Their formation is a requirement of modern times. The question arises whether students of modern technical universities get entrepreneurial competencies and whether they transform these competencies into their entrepreneurial intentions. More than 3.6 thousand students from six technical universities from Poland, Ukraine, Latvia, Bulgaria, and Lithuania...
-
Numerical and experimental investigation of guided ultrasonic wave propagation in non-uniform plates with structural phase variations
PublicationThe article presents the results of numerical and experimental investigations of guided wave propagation in aluminum plates with variable thickness. The shapes of plate surfaces have been specially designed and manufactured using a CNC milling machine. The shapes of the plates were defined by sinusoidal functions varying in phase shift, which forced the changes in thickness variability alongside the propagation path. The main aim...
-
Remigiusz Michalczewski dr hab. inż.
People -
[ILiT, IŚGiE] Mathematical methods in engineering
e-Learning Courses{mlang pl} Dyscyplina: inżynieria lądowa i transport; inżynieria środowiska, górnictwo i energetyka Zajęcia obowiązkowe dla doktorantów I i II roku Prowadzący: dr inż. Roger Sauer, prof. PG Liczba godzin: 15 Forma zajęć: wykład {mlang} {mlang en} Discipline: civil engineering and transport; environmental engineering, mining and power engineering Obligatory course for 1st and 2nd-year PhD students Academic teacher: dr...
-
Joanna Żukowska dr hab. inż.
PeopleJoanna Żukowska (born 15.12.1974 in Kwidzyn) – road engineering and transport safety expert. She is a researcher in the field of transport, including traffic safety. Her main fields of research are: traffic risk modelling, safety trend forecasts, programming and implementation of traffic safety management systems. She is an author and co-author of many publications on transport safety, provided expertise for the Polish Infrastructure...
-
Vident-real: an intra-oral video dataset for multi-task learning
Open Research DataWe introduce Vident-real, a large dataset of 100 video sequences of intra-oral scenes from real conservative dental treatments performed at the Medical University of Gdańsk, Poland. The dataset can be used for multi-task learning methods including:
-
Images of apples for the use of the Viola-Jones method. Data set no. 2 - grey scale
Open Research DataThe database contains pictures of apples made at different angles, from different sides and containing different varieties. In this way, two bases of apple images were created (each database contains 1,100 images). This set is data set no. 2 - grey scale: processed images in shades of gray. The photos were prepared for the best possible detection process...
-
Groundwater quality regeneration in the discharge zone of the Gdansk aquifer system
PublicationEksploatacja wód podziemnych w rejonie Gdańska prowadzona jest głównie w strefie drenażu wód na nizinach nadmorskich. Wieloletni, intensywny pobór spowodował niekorzystne zmiany w ich jakości, są one głównie związane z zasoleniem wód podziemnych intruzjami wód morskich. Sytuacja ta dotyczy zwłaszcza pietra czwartorzędowego. Spadek wilekości eksploatacji, który obserwuje się od lat 90. prowadzi poprawy jakości wód podziemnych, a...
-
Perspektywy zastosowania hybrydowych układów napędowych w pojazdach wojskowych.
PublicationPrzedstawiono budowę, działanie oraz zalety i wady różnych rodzajów hybrydowych układów napędowych pojazdów. Opisano programy rozwojowe wojskowych pojazdów hybrydowych prowadzone obecnie w Stanach Zjednoczonych: RST- V Shadow, COMBATT, ''hybrydyzację'' układów napędowych samochodu Humvee, transportera M113 i bojowego wozu piechoty M2 Bradley oraz programy perspektywiczne -FCS,CHPS, UGV. Krótko zaprezentowano prace dotyczące...
-
Thermally affected parameters of the current-voltage characteristics of silicon photocell
PublicationW pracy wykazano: zależność wzrostu prądu zwarcia wskutek absorpcji dodatkowych fotonów ze wzrostem temperatury, spadek napięcia wbudowanego złącza p-n wraz ze wzrostem temperatury, wpływ temperatury na zmianę napięcia otwartego obwodu. Dodatkowo wyznaczone odpowiednie współczynniki temperaturowe porównano z wartościami wynikającymi z rozważań teoretycznych. Badano parametry elektryczne następujących elementów wykonanych z amorficznego...
-
Electric motor drive with inverter output filter
PublicationPrzedstawiono zagadnienie sterowania i estymacji w układzie napędowym z silnikiem indukcyjnym i filtrem sinusoidalnym.Filtr użyty jest do wygładzenia prądu i napięcia silnika. Filtr wprowadza spadek napięcia i przesunięcie fazowe prądów i napięć uniemożliwiające stosowane bezczujnikowych metod sterowania wektorowego. Rozwiązaniem jest uwzględnienie filtru w sterowaniu i estymacji. Artykuł pokazuje takie rozwiązanie dla metody sterowania...
-
Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels
PublicationSuperadditivity effects of communication capacities are known in the case of discrete variable quantum channels. We describe the continuous variable analog of one of these effects in the framework of Gaussian multiple access channels (MACs). Classically, superadditivity-type effects are strongly restricted: For example, adding resources to one sender is never advantageous to other senders in sending their respective information...
-
Porównanie przebiegów równolegle zachodzących flotacji jonów cynku i miedzi
PublicationPrzedstawiono wyniki badań dotyczących wpływu pH oraz stężenia kolektora na efektywność procesów flotacji jonowej i precypitacyjnej zastosowanych do równoległego usuwania jonów cynku i miedzi z rozcieńczonych kwaśnych i alkalicznych roztworów wodnych. Najwyższe wartości stopnia wyflotowania dla obydwu metali odnotowano dla pH = 8,5-9,5 przy zastosowaniu SDS jako kolektora. Dla roztworów o pH>11 zaobserwowano spadek stopnia wyflotowania...
-
Search for the most useful geometry of an acoustic journal bearing
PublicationComputer simulations of a number of journal bearing’s geometries utilising acoustic levitation were carried out. The choice of the best geometry depended on the ability of a deformed shape, created by piezo-electric elements, to facilitate squeeze film ultrasonic levitation, and also to create three evenly distributed diverging aerodynamic gaps. Deformations of analysed variants of the bearing’s shape were generated by numerical...
-
Schematiclab.com – A web tool for the design and analysis of electrical circuits
PublicationAlong with a general progress in the modern computational tools, dynamic development of Internet applications using the cloud methodology and solutions is now observed. Clearly, also the applications installed locally, and being commonly used previously, are gradually gaining their counterparts in computational network clouds. The clouds have also brought new service sales opportunities. Namely, the service sales model based on...
-
Exploring ontological approach for user requirements elicitation in design of online virtual agents
PublicationEffective user requirements elicitation is a key factor for the success of software development projects. There are many qualitative and quantitative research studies that promulgate particular methods and show the application of user requirements elicitation in particular domains. However, few try to eliminate the burden of ambiguity in gathered data, naturally occurring in different groups of stakeholders. This paper deals with...
-
Wykorzystanie flotoekstrakcji do oczyszczania zaolejonych ścieków pochodzących z procesu remediacji gruntów
PublicationProces flotoekstrakcji, będący połączeniem ekstrakcji rozpuszczalnikowej i aeracji, zastosowano do usuwania zanieczyszczeń organicznych (dodekanu i heksadekanu) z fazy wodnej do różnych faz organicznych (1-dekanol, 1-oktanol, olej mineralny). Procesy prowadzono w obecności surfaktantów niejonowych (Rokanol NL6 i Triton BG10) oraz anionowych (dodecylosiarczan sodu). Ze wzrostem stężenia surfaktantów obserwowano spadek efektywności...
-
The preferable ways of decision-making in IT teams
PublicationSoftware development team collaboration requires various decisions regarding essential aspects of a project’s progress. General and particular decision-making models are considered, and their main aspects such as team types, problem solving categories, and decision-making ways are analyzed. The research concerns representative groups of IT specialists and their preferences in decision-making are investigated. Four possible cases were...
-
Asphalt concrete subjected to long-time loading at low temperatures – Deviations from the time-temperature superposition principle
PublicationThe article presents the observed deviations from the time-temperature superposition principle of asphalt concretes, tested in the bending beam creep test at low temperatures for a long time of loading. In almost all tested asphalt concretes, deviations appeared after 500 s of loading at the temperature of -10 C. Some types of bitumen presented deviations at other temperatures – usually the harder the grade of the bitumen, the...
-
Application of Navigated Ultrasound for Assessment of the Anterior Pelvic Plane in Patients With Degenerative Hip Diseases
Publication -
OBTAINING OF COUMARONE-INDENE RESINS BASED ON LIGHT FRACTION OF COAL TAR 3. COUMARONE-INDENE RESINS WITH METHACRYLIC FRAGMENTS
PublicationThe method for obtaining coumarone-indene resins with methacrylic fragments (CIRM) was developed with the addition of methyl ethacrylate, using a light fraction of coal tar and its fraction boiling within 423–463 К. CIRM was obtained via radical cooligomerization using 2,2'-azobis (2-methyl-propionitrile) as the initiator. The effect of the initiator amount, temperature and reaction time on the yield, softening temperature and...
-
Macrocyclic derivatives of imidazole as chromoionophores for bismuth(III)/lead(II) pair
Publication18-membered diazomacrocycles with imidazole or 4-methylimidazole residue as a part of macrocycle were used as chromoionophores in bismuth(III) and lead(II) dual selective optodes for the first time. Cellulose triacetate membranes doped with macrocyclic chromoionophores are bismuth(III) and lead(II) selective with color change from orange/red to different shades of blue and violet, respectively. Results obtained for model and real...
-
Influence of Thermal Imagery Resolution on Accuracy of Deep Learning based Face Recognition
PublicationHuman-system interactions frequently require a retrieval of the key context information about the user and the environment. Image processing techniques have been widely applied in this area, providing details about recognized objects, people and actions. Considering remote diagnostics solutions, e.g. non-contact vital signs estimation and smart home monitoring systems that utilize person’s identity, security is a very important factor....