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Search results for: kinematografia prl
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The effect of current signal filtering method on the value of cutting power while sawing wood
PublicationThe goal of this work was to investigate an effect of various signal pre-processings on the outline of the electrical power curve and its influence on the measured cutting force estimation. Two signal processing methods were selected for the needs of the experiment, including digital filter and wavelet transform. The filter used was Butterworth, 3rd order band-stop with the cut-out band from 45 Hz to 55 Hz. The second approach...
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Waste Rubber Pyrolysis: Product Yields and Limonene Concentration
PublicationTires, conveyor belts, floor mats, and shoe soles form a main-stream of rubber waste. The amount of these used materials continuously increases due to development of the rubber market. Therefore, pro-ecological utilization (i.e., energy recycling instead of burning) and recovering valuable and recyclable materials becomes an urgent necessity. In this regard, this work was devoted to the chemical recycling of selected used rubber...
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Regional quality contests based on business excellence models – Pomeranian case study
PublicationCompetitions based on models of organizational excellence have significant potential. Organizations participating in these initiatives have the chance not only to get marketing benefits, but also gain comprehensive knowledge about their management systems. Moreover, thanks to the structure of models of excellence an organization can plan in detail the improvement activities in its main processes. The aim of the authors is to analyze...
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MACHINE LEARNING SYSTEM FOR AUTOMATED BLOOD SMEAR ANALYSIS
PublicationIn this paper the authors propose a decision support system for automatic blood smear analysis based on microscopic images. The images are pre-processed in order to remove irrelevant elements and to enhance the most important ones - the healthy blood cells (erythrocytes) and the pathologic (echinocytes). The separated blood cells are analyzed in terms of their most important features by the eigenfaces method. The features are the...
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Reference-free determination of debonding length in reinforced concrete beams using guided wave propagation
PublicationThis paper presents theoretical and experimental investigations of guided wave propagation in reinforced concrete beams, with pre-existing debonding between steel rebars and concrete blocks, for the purpose of damage detection. The primary aim of these investigations was a detailed analysis of the possible applications of wave propagation in single and multiple debonding detection in reinforced concrete structures and reference-free...
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Clearing directed subgraphs by mobile agents
PublicationWe study several problems of clearing subgraphs by mobile agents in digraphs. The agents can move only along directed walks of a digraph and, depending on the variant, their initial positions may be pre-specified. In general, for a given subset S of vertices of a digraph D and a positive integer k, the objective is to determine whether there is a subgraph H=(V,A) of D such that (a) S is a subset of V, (b) H is the union of k directed...
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Performance of the very high-temperature heat pump with low GWP working fluids
PublicationTraditional heat pumps are a very attractive pro-ecological solutions for a number of applications, including providing of heating or heat recovery from industrial processes. The application range of heat pumps could be greatly enlarged when the operating temperature would be increased to 130-150°C and/or the temperature lift can be increased to 50-100 K. In the paper, the very high temperature vapour-compressor based single stage...
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A method to determine the tightening sequence for standing rigging of a mast
PublicationThe article proposes an alternative method to determine the sequence of generation of pre-tension forces in standing rigging of a mast. The proposed approach has been verified on both a virtual simulation experiment and laboratory tests. In this method, the desired tension values are obtained using the influence matrix which allows to calculate the effect of tension change in an individual rope on the tension distribution in the...
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Projektowanie urbanistyczne IV (DOLNE MIASTO)
e-Learning CoursesProblematyka zajęć dotyczy zagadnienia transformacji dzielnicy śródmiejskiej (Dolne Miasto – Gdańsk). Opracowanie nowego programu funkcjonalno-przestrzennego dla fragmentu śródmieścia Gdańska. Rewitalizacji dzielnicy towarzyszącej centrum historyczno-turystycznemu miasta i stanowiącej jednocześnie jego sztywną granicę przestrzenną. Rewitalizacji na styku miasta i obszaru Żuław. Celem zajęć jest zapoznanie studentów III roku studiów...
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Hanna Obracht-Prondzyńska dr inż. arch.
PeopleHanna Obracht-Prondzyńska, PhD MArch, Eng. Assistant Professor at the University of Gdańsk, Department of Spatial Management, academic teacher of urban design and spatial data analyses. Architect and urban planner experienced in data driven urban design and planning. She defended her PhD with distinction in engineering and technical sciences in the discipline of architecture and urban planning in 2020 at the Faculty of Architecture...
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Cień malarza. - wystawa autorska
PublicationDruk towarzyszący wystawie indywidualnej malarstwa, która miała miejsce w Galerii-pl w Gdyni w grudniu 2010 roku. Publikacja liczy 2 strony A3 i zawiera tekst krytyczny i notę biograficzną w języku polskim oraz 3 kolorowe reprodukcje.
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Zintegrowane układy pasywne w komunikacji bezprzewodowej - 2022
e-Learning CoursesEiT – studia II stopnia, I semestr.
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Zintegrowane układy pasywne w komunikacji bezprzewodowej - 2023
e-Learning CoursesEiT – studia II stopnia, I semestr.
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Zintegrowane układy pasywne w komunikacji bezprzewodowej - 2024
e-Learning CoursesEiT – studia II stopnia, I semestr.
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Propargylamines in Pd/Cu-catalyzed tandem coupling-cyclization-N-deprotection in a single pot: Construction of N-unsubstituted vs N-sulfonyl indole ring
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Integracja Niskopoziomowego Podsystemu Bezpieczeństwa dla Systemu IIP
PublicationArtykuł omawia prace nad prototypowaniem i integracja podsystemu bezpieczenstwa Systemu IIP na poziomie wirtualizacji zasobów sieciowych. Przedstawiono jego zakres funkcjonalny, sposób funkcjonowania w sieci badawczej PL-LAB oraz realizacje scenariusza ochrony danych przesyłanych w Równoległym Internecie CAN.
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Effect of Temperature and Nanoparticle Concentration on Free Convective Heat Transfer of Nanofluids
PublicationA theoretical analysis of the influence of temperature and nanoparticle concentration on free convection heat transfer from a horizontal tube immersed in an unbounded nanofluid was presented. The Nusselt (Nu) number and heat transfer coefficient were parameters of the intensity of the convective heat transfer. For free convection, the Nu number was a function of the Rayleigh (Ra) number and Prandtl (Pr) number. The Rayleigh (Ra)...
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Ścinanie w ujęciu przepisów europejskich.
PublicationW pracy omówiono, wraz z obszernym komentarzem model obliczeniowy i zasady wymiarowania konstrukcji żelbetowych na ścinanie wg normy europejskiej. Podano wytyczne projektowania zbrojenia. Przedstawiono szeroki komentarz dotyczący zalet i wad modelu wg normy pr EN 1992 - July 2002
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Mechanical response of human thoracic spine ligaments under quasi-static loading: An experimental study
PublicationPurpose This study aimed to investigate the geometrical and mechanical properties of human thoracic spine ligaments subjected to uniaxial quasi-static tensile test. Methods Four human thoracic spines, obtained through a body donation program, were utilized for the study. The anterior longitudinal ligament (ALL), posterior longitudinal ligament (PLL), capsular ligament (CL), ligamenta flava (LF), and the interspinous ligament and...
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Multi-instrument analysis of L-band amplitude scintillation observed over the Eastern Arabian Peninsula
PublicationThe study of scintillation-causing ionospheric irregularities is important to mitigate their effects on satellite communications. It is also important due to the spatial and temporal variability of these irregularities, given that their characteristics differ from one region to another. This study investigates the spatial and temporal characteristics of L1 amplitude scintillation-causing ionospheric irregularities over the Eastern...
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A new construction of shell-and-tube heat exchanger with impinging jets and minichannels technologies for heat recovery from gases – experimental analysis
PublicationA dynamic development of technologies allowing waste heat utilization is observed in a correspondence with a pro-ecological approach of the zero waste idea. Such approach becomes the most demanding in the area of low-temperature was heat sources, especially gaseous media. Till now, they were usually not utilized due to unfavorable thermal conditions and high costs. Therefore, the zero waste approach directs research on techniques...
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Seminarium dyplomowe 2023_sem 8
e-Learning CoursesSeminarium dyplomowe dotyczy zagadnień niezbędnych do opracowania projektu dyplomowego. Tematyka zajęć: Zasady sporządzania opisu technicznego (zakres w projekcie budowlanym a książeczka dyplomowa); Zagospodarowanie terenu (wytyczne wg normy, zakres, grubości linii itp. + przykładowe rysunki); Rzuty – zasady zapisu projektu budowlanego (wymiarowanie, grubości linii, stolarka, szrafy – wg normy, opisy itp. + przykładowe rysunki); Przekroje...
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Inhibitors of glucosamine-6-phosphate synthase as potential antimicrobials or antidiabetics – synthesis and properties
PublicationGlucosamine-6-phosphate synthase (GlcN-6-P synthase) is known as a promising target for antimicrobial agents and antidiabetics. Several compounds of natural or synthetic origin have been identified as inhibitors of this enzyme. This set comprises highly selective L-glutamine, amino sugar phosphate or transition state intermediate cis-enolamine analogues. Relatively low antimicrobial activity of these inhibitors, poorly penetrating...
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Laboratoryjny bioreaktor z systemem kontroli pH do badań nad wytwarzaniem wodoru w procesie ciemnej fermentacji
PublicationW pracy przedstawiono konstrukcję niskokosztowego bioreaktora badawczego wyposażonego w sys-tem kontroli i regulacji pH. Zaprezentowano jego wykorzystanie do badania produkcji wodoru w pro-cesie fermentacji ciemnej z zastosowaniem Enterobacter aerogenes ATCC 13048. W pracy porównano wyniki uzyskane przy prowadzeniu procesu bez i z regulacją pH dla różnych materiałów wsadowych: glukozy, hydrolizatów topoli energetycznej, serwatki...
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Therapeutic Potential of Multifunctional Derivatives of Cholinesterase Inhibitors
PublicationThe aim of this work is review of tacrine analogues from the last three years, which were not included in the latest review work, donepezil and galantamine hybrids from 2015 and rivastigmine derivatives from 2014. In this account we summarize the efforts toward the development and characterization of non-toxic inhibitors of cholinesterases based on mentioned drugs with various interesting additional properties such as antioxidant,...
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Strain sequence effect on fatigue life and fracture surface topography of 7075-T651 aluminium alloy
PublicationThe paper studies the effect of strain-loading sequence on fatigue lifetime and fracture surface topographies in 7075-T651 aluminum alloy specimens. Fatigue tests were performed in two ways: (i) constant-amplitude loading and (ii) two series of variable amplitude loading with non-zero mean strain values. The topography of the fatigue fractures was measured over their entire surfaces with the help of an optical confocal measurement...
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Assessing the Risk in Urban Public Transport for Epidemiologic Factors
PublicationPandemics have presented new challenges for public transport organisers and operators. New diseases (e.g., influenza H1N1, severe acute respiratory syndrome—SARS, as well as, more recently, SARS-CoV-2) increase the need for new protection measures to prevent epidemic outbreaks in public transport infrastructure. The authors’ goal is to present a set of actions in the area of public transport that are adjusted to different levels...
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Flood Classification in a Natural Wetland for Early Spring Conditions Using Various Polarimetric SAR Methods
PublicationAbstract--- One of the major limitations of remote sensing flood detection is the presence of vegetation. Our study focuses on a flood classification using Radarsat-2 Quad-Pol data in a natural floodplain during leafless, dry vegetation (early spring) state. We conducted a supervised classification of a data set composed of nine polarimetric decompositions and Shannon entropy followed by the predictors' importance estimation to...
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The Role of Inflammatory Cytokines in the Pathogenesis of Colorectal Carcinoma-Recent Findings and Review
PublicationThe inflammatory process plays a significant role in the development of colon cancer (CRC). Intestinal cytokine networks are critical mediators of tissue homeostasis and inflammation but also impact carcinogenesis at all stages of the disease. Recent studies suggest that inflammation is of greater importance in the serrated pathway than in the adenoma-carcinoma pathway. Interleukins have gained the most attention due to their...
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Standaryzacja dokumentacji technicznej dla potrzeb wielkoobszarowych opracowań geodezyjno-kartograficznych; duże projekty - wysokie wymagania
PublicationArtykuł omawia problemy standaryzacji wielkoobszarowych, wysokobudżetowych opracowań geodezyjnych wykonywanych na zlecenie Agencji Restrukturyzacji i Modernizacji Rolnictwa. W/w prace geodezyjne w zakresie merytorycznym obejmują wektorową mapę ewidencji gruntów, ortofotomapę cyfrową oraz wektorową mapę pól zagospodarowania.W przedmiotowym artykule - na bazie praktycznych doświadczeń - przedstawiono problematykę standaryzacji dokumentacji...
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PERFORMANCE OF ENDOSCOPIC IMAGE ANALYSIS ALGORITHMS IN LARGE BOWEL VIDEOS PROCESSING
PublicationComputer-assisted endoscopy is a rapidly developing eld of study. Many image anal- ysis algorithms exist, achieving very high rates of eciency at processing single endoscopic images. However, most of them were never tested in processing real-life endoscopic videos. In the article such tests of 16 endoscopy image analysis algorithms are presented and dis- cussed. Tests were performed on two real-life endoscopic videos of a human...
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Impact of Work from Home on Agile Software Project Execution – the Empirical Study
PublicationBackground: The outbreak of a Covid-19 pandemic changed the working patterns of software projects delivery. Aim: The study examines how the work from home (WFH) impacted the software project execution for emergence of differentiating patterns. Method: The data on project execution in two country locations was examined. The population is 3711 projects across 52 months (26 pre- and 26 post-pandemic) is analyzed. The paper identifies the...
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SHEAR YIELD STRESSES AND FRACTURE TOUGHNESS OF SCOTS PINE (PINUS SYLVESTRIS L.) ACCORDING TO THE RAW MATERIAL PROVENANCE
PublicationIn this paper values of the fracture toughness and of shear yield stress in the shear zone of Scots pine are presented. Tests of cutting were carried on samples of Scotch pine (Pinus sylvestris L.) wood of five provenances from Poland. These experimentally cutting tests were carried on the sash gang saw PRW-15M and the values of cutting power were obtained. The values of fracture toughness and shear yield stress based on Atkins’s...
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Wewnętrzne i zewnętrzne źródła węgla organicznego dla wspomagania efektywności procesu denitryfikacji
PublicationEfektywność procesu denitryfikacji i podwyższonego biologicznego usuwania fosforu w oczyszczalniach z biologicznym usuwaniem związków biogennych zależy w znacznym stopniu od dostępności związków węgla organicznego. Celem prezentowanych badań było określenie wpływu dozowania różnych zewnętrznych źródeł węgla organicznego na efektywność usuwania związków biogennych metodą osadu czynnego. W doświadczeniach zastosowano ścieki oczyszczone...
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Low cost microwave X-band generator
PublicationA low cost microwave X-band generator for educational purposes was designed and built. Its simple construction and user's interface makes it suitable for a student laboratory.The generator is based on a single frequency conversion concept. It uses a digitally tunable PLL chip for intermediate frequency generation and an active frequency multiplier for frequency conversion. The generator covers 9,7 - 11 GHz part of the X frequency...
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Realistic noise-tolerant randomness amplification using finite number of devices
PublicationRandomness is a fundamental concept, with implications from security of modern data systems, to fundamental laws of nature and even the philosophy of science. Randomness is called certified if it describes events that cannot be pre-determined by an external adversary. It is known that weak certified randomness can be amplified to nearly ideal randomness using quantum-mechanical systems. However, so far, it was unclear whether randomness amplification...
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Finite element/mode-matching analysis of ferrite/dielectric line junctions of arbitrary cross-section
PublicationThis paper is focused on the analysis of line junctions obtained as a cascade of dielectric and ferrite guides of arbitrary cross-section. The main application of such structures is nonreciprocal devices such as isolators, circulators, or phase shifters. The efficient finite element/mode-matching approach is proposed to the analysis of such structures. In this approach, thefiniteelementmethod is applied todetermine propagation...
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INFLUENCE OF DATA NORMALIZATION ON THE EFFECTIVENESS OF NEURAL NETWORKS APPLIED TO CLASSIFICATION OF PAVEMENT CONDITIONS – CASE STUDY
PublicationIn recent years automatic classification employing machine learning seems to be in high demand for tele-informatic-based solutions. An example of such solutions are intelligent transportation systems (ITS), in which various factors are taken into account. The subject of the study presented is the impact of data pre-processing and normalization on the accuracy and training effectiveness of artificial neural networks in the case...
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Thermal degradation kinetics of poly(propylene succinate) prepared with the use of natural origin monomers
PublicationLinear biobased polyester polyols were prepared with the use of succinic acid and 1,3-pro- panediol (both with natural origin). Tetraisopropyl orthotitanate (TPT) was used as a catalyst. In order to determine the effect of various synthesis temperature conditions on the thermal degradation kinet- ics, nine sequences of temperature conditions were used during two-step polycondensation reaction. Thermogravimetric analysis was conducted...
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Modeling hydrolysis of slowly biodegradable organic compounds in biological nutrient removal activated sludge systems
PublicationHydrolysis is an important process in biological wastewater treatment and has been known as the rate limiting step in organic carbon removal from municipal or industrial wastewater. The biodegradation of XS is initiated by hydrolysis which is an integral part of activated sludge models, such as the Activated Sludge Model no. 2d (ASM2d). The aim of this study was to evaluate different concepts of modeling the hydrolysis process...
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Wspomagana komputerowo weryfikacja określonego poziomu nienaruszalności bezpieczeństwa sil z wykorzystaniem autorskiej aplikacji ProSIL
PublicationW referacie przedstawiono oprogramowanie Pro SIL wspomagające zarządzanie bezpieczeństwem funkcjonalnym. Program ProSIL składa się z trzech modułów wspomagających: określanie wymaganego poziomu SIL (moduł ProSILen) weryfikację SIL (moduł ProSILer) oraz przeprowadzenie analizy warstw zabezpieczeń metodą LOPA. W aplikacji ProSIL zaimplementowano opracowaną w trakcie badań metodykę analizy bezpieczeństwa funkcjonalnego w projektowaniu...
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OPERATIONAL PROBLEMS OF CONSTRUCTED WETLAND FOR LANDFILL LEACHATE TREATMENT: CASE STUDY
PublicationThe present paper discusses the quality fluctuations of leachate from municipal landfill in Gdansk (Poland) over the last 5 years and the evaluation of a wetland system designed for treatment of the leachate. The research has been conducted during a 5-year period. The constructed wetland for leachate treatment was built in 2001; it consists of 2 horizontal subsurface flow reed beds, working in parallel. In the period 2005–2006...
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THE ROLE OF NATURE IN PLACEMAKING WITHIN THE LIMITS OF HISTORIC CITIES
PublicationThis paper focuses on the role of nature in placemaking within historic cities. There are two different approaches to placemaking – The first is a more traditional approach, i.e. complete building process which entails significant investments. The second is “Lighter, Quicker, Cheaper” approach proposed by the Project for Public Spaces organization. This article discusses the role, importance and place of nature in both approaches....
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Machine Learning and Text Analysis in an Artificial Intelligent System for the Training of Air Traffic Controllers
PublicationThis chapter presents the application of new information technology in education for the training of air traffic controllers (ATCs). Machine learning, multi-criteria decision analysis, and text analysis as the methods of artificial intelligence for ATCs training have been described. The authors have made an analysis of the International Civil Aviation Organization documents for modern principles of ATCs education. The prototype...
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Sulfate reducing ammonium oxidation (SULFAMMOX) process under anaerobic conditions
PublicationSulfate (SO42-) can be an electron acceptor for ammonium nitrogen (NH4+) oxidation under anaerobic conditions. The process is known as sulfammox and can be a viable alternative to conventional, nitrite (NO2-) dependent, anammox. Two bacterial species, including Bacillus Benzoevorans and Brocadia Anammoxoglobus Sulfate, can perform that process. With sulfammox, an economically inefficient pre-nitration step (due to aeration) is...
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Design, Synthesis, and Enzymatic Evaluation of Novel ZnO Quantum Dot-Based Assay for Detection of Proteinase 3 Activity
PublicationHerein, the synthesis and application of functionalized quantum dot-based protease probes is described. Such probes are composed of nontoxic ZnO nanocrystals decorated by amino groups followed by linker and labeled peptide attachment. Spherical NH2-terminated ZnO quantum dots (QDs) with the average size ranging from 4 to 8 nm and strong emission centered at 530 nm were prepared using the sol−gel method. The fluorescence of ZnO...
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BADANIA EFEKTYWNOŚCI ENERGETYCZNEJ NOWO PRODUKOWANYCH PALIW ŻEGLUGOWYCH Z ZASTOSOWANIEM SILNIKA DIESLA
PublicationW artykule prz ybliżono jedno z zagadnień naukowych rozwiązywanych w ramach projektu badawczego finansowanego przez Wojewódzki Fundusz Ochrony Środowiska i Gospodarki Morskiej w Gdańsku, a mianowicie metodę badań energetycznych silnika o zapłonie samoczynnym w warunkach zasilania niestandardowym (modyfikowanym) paliwem żeglugowym. Zaprezentowano reprezentatywne wyniki te stów silnikowych realizowanych...
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Energetyka PL V sem (WIMiO + WEiA) - Egzamin z języka angielskiego B2 – 31.01.2022
e-Learning Courses -
Rysunek architektoniczny II / sem. 2 / 2022/2023 / KAMiUP / gr 1-6 PL
e-Learning CoursesRysunek architektoniczny II sem.2. 2022/2023
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Free Convection Heat Transfer from Horizontal Cylinders
PublicationThe results of experimental investigation of free convection heat transfer in a rectangular container are presented. The ability of the commonly accepted correlation equations to reproduce present experimental data was tested as well. It was assumed that the examined geometry fulfils the requirement of no-interaction between heated cylinder and bounded surfaces. In order to check this assumption recently published correlation equations...