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Search results for: EMBEDDED BAR
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Effects of beach wrack on the fate of mercury at the land-sea interface – A preliminary study
PublicationSince the 1970s, the amount of aquatic plants and algae debris, called beach wrack (BW), has increased along the shores of industrialised regions. The strong ability of primary producers to accumulate pollutants can potentially result in their deposition on the beach along with the BW. Despite that, the fate and impact of such pollutants on sandy beach ecosystems have not been investigated so far. This study examines the fate...
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Novel approaches in the synthesis of batracylin and its analogs: rebirth of an old player?
PublicationW pracy opisano batracylinę (BAT), jej syntezę i aktywność biologiczną oraz otrzymane analogi. BAT została wyselekcjonowana przez NCI (Bethesda, USA) w programie poszukiwań nowych potencjalnych leków przeciwnowotworowych. Związek ten w badaniach in vivo na myszach okazał się bardzo aktywny przeciw nowotworowi okrężnicy 38 (Colon 38), trudnemu do wyleczenia przez dotychczas znane leki przeciwnowotworowe. Jest ona skuteczna również...
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FEM simulations applied to the failure analysis of RC structure under the influence of municipal sewage pressure
PublicationThe paper discusses a failure mechanism of reinforced concrete (RC) structure with steel cover that failed under the influence of municipal sewage pressure. To explain the reasons of failure, in-situ measurements, laboratory experiments and comprehensive Finite Element Method (FEM) computations were performed. Non-destructive in-situ scanning tests were carried out to determine quantity and cover thickness of embedded reinforcement...
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Sensitivity analysis of simple random beam models by means of Monte Carlo Methods using Variance Reductions Techniques
PublicationA probabilistic sensitivity analysis of two nonlinear bar structures is presented. The analysis is carried out on the basis of the Monte Carlo method. The imperfections of the structures and the applied loads are adapted as random variables. Based on all of the generated input variables, an output response of the system is sought. Afterwards, a coefficient responsible for the structure failure is calculated and the limit state...
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Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions
PublicationThe underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the direct sequence spread spectrum (DSSS) technique, which consists in binary phase shift keying (BPSK) according to a pseudo-random spreading sequence. This paper describes the DSSS...
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Present state of sewage and wastewater treatment plants in the polish coast of Baltic Sea
PublicationIn the paper the state of art of wastewater management in four zones of Polish Baltic Sea coast: the Vistula Lagoon, the Bay of Gdansk and Bay of Puck, the open sea zone and the Szczecin Lagoon, is discussed. Hydrological characteristics of these four zones as well as characteristics and operation effectiveness of wastewater treatment plants (WWTPs) located there, are presented.
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A Device for Measuring Auditory Brainstem Responses to Audio
PublicationStandard ABR devices use clicks and tone bursts to assess subjects’ hearing in an objective way. A new device was developed that extends the functionality of a standard ABR audiometer by collecting and analyzing auditory brainstem responses (ABR). The developed accessory allows for the use of complex sounds (e.g., speech or music excerpts) as stimuli. Therefore, it is possible to find out how efficiently different types of sounds...
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Agile Commerce in the light of Text Mining
PublicationThe survey conducted for this study reveals that more than 84% of respondents have never encountered the term “agile commerce” and do not understand its meaning. At the same time, they are active participants of this strategy. Using digital channels as customers more often than ever before, they have already been included in the agile philosophy. Based on the above, the purpose of the study is to analyse major text sets containing...
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Sentiment Analysis of Facebook Posts:the Uber case
PublicationThis article analyses the sentiment of opinions, i. e. its classification as phrases with a neutral, positive and negative emotional tone. Data used as a basis for the analysis were opinions expressed by Facebook users about Uber and collected in the period between July 2016 and July 2017. The primary objective of the study was to obtain information about the perceptions of Uber over thirteen consecutive months. The study confirms...
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The Crowd as a Source of Knowledge - From User Feedback to Fulfilling Requirements
PublicationCrowd-based and data-intensive requirements engineering (RE) strategy is an approach for gathering and analyzing information from the general public or the so-called crowd to derive validated user requirements. This study aims to conceptualize the process of analyzing information from a crowd to achieve the fulfillment of user requirements. The created model is based on the ADO framework (Antecedents-Decisions-Outcomes). In the...
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Analiza sentymentu jako narzędzie monitorowania wyników finansowych przedsiębiorstwa
PublicationMedia społecznościowe tworzą globalną platformę do dzielenia się interesującymi pomysłami lub nowościami, komentarzami i recenzjami. Stanowią bogate źródło danych do eksploracji opinii w celu pozyskania wcześniej nieznanej i użytecznej wiedzy biznesowej, która umożliwi nie tylko zwinne zarządzanie na rzecz skutecznej obsługi klienta, ale również powinna mieć odzwierciedlenie w finansowych wynikach przedsiębiorstwa. Za główny cel...
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Evaluation of a company’s image on social media using the Net Sentiment Rate
PublicationVast amounts of new types of data are constantly being created as a result of dynamic digitization in all areas of our lives. One of the most important and valuable categories for business is data from social networks such as Facebook. Feedback resulting from the sharing of thoughts and emotions, expressed in comments on various products and services, is becoming the key factor on which modern business is based. This feedback is...
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AutoCAD: Examination of Factors Influencing User Adoption
PublicationThe primary purpose of the research is to examine and validate determinants of user intention to use AutoCAD software, utilising the constructs from prior studies in a more integrated model. The paper proposes a revised Technology Acceptance Model (TAM) for measuring the adoption of AutoCAD. In the study, a latent construct PPA (perceived physical accessibility) was added to the proposed research model as a new determinant of AutoCAD...
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Decyzje optymalne z Solverem
PublicationNa rynku można odnaleźć wiele podręczników pomocnych w rozwijaniu kompetencji związanych z posługiwaniem się arkuszem kalkulacyjnym w praktyce menedżerskiej. Niewiele jest natomiast pozycji literaturowych pokazujących możliwości wykorzystania MS Solver do wspomagania decyzji. Niniejsza książka ma za zadanie wypełnić tę lukę. Jej celem jest przedstawienie możliwości dodatku Solver w procesie podejmowania decyzji optymalnych. Intencją...
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Antecedents and outcomes of social media fatigue
PublicationPurpose – This study aims to explore which of four chosen factors (i.e. privacy concerns, FoMO, self-disclosure and time cost) induce a feeling of strain among Facebook users in terms of social media fatigue (SMF), and if this occurs, whether it further influences such outcomes as discontinuance of usage (DoU) and interaction engagement decrement (IED). Design/methodology/approach – Through an online structured questionnaire, empirical...
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Mapping of the Covid-19 Vaccine Uptake Determinants From Mining Twitter Data
PublicationOpinion polls on vaccine uptake clearly show that Covid-19 vaccine hesitancy is increasing worldwide. Thus, reaching herd immunity not only depends on the efficacy of the vaccine itself, but also on overcoming this hesitancy of uptake in the population. In this study, we revealed the determinants regarding vaccination directly from people’s opinions on Twitter, based on the framework of the 6As taxonomy. Covid-19 vaccine acceptance...
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Kreowanie wartości publicznej przez wykorzystanie wolnego i otwartego oprogramowania GNU Health
PublicationGłównym celem pracy jest prezentacja roli, potencjału i funkcjonalności oprogramowania GNU Health. Ten zaawansowany i dojrzały, wysokiej jakości produkt - opracowany i nieustannie rozwijany w ramach projektu wolnego i otwartego oprogramowania - jest z sukcesem wdrażany w placówkach ochrony zdrowia w wielu krajach. Jego zastosowanie przyczynia się nie tylko do usprawnień w zarządzaniu praktyką medyczną lecz również odgrywa ważną...
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Wybór strategii rozwoju Portu Gdańsk opartej na analizie TOWS/SWOT
PublicationMorski port w Gdańsku, będący podmiotem o podstawowym znaczeniu dla polskiej gospodarki narodowej, odgrywa również znaczącą rolę jako ogniwo Transeuropejskiego Korytarza Transportowego nr VI łączącego kraje skandynawskie z południowo-wschodnią Europą. Aktualnie podmiot ten utrzymuje pozycję zdecydowanego lidera wśród polskich portów pod względem obsłużonej masy ładunkowej. Aby tę pozycję zachować, spotęgować dalszy dynamiczny...
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Selecting the optimum location for logistics facilities using Solver
PublicationSiting logistics facilities strategically in the most costeffective geographic location is one of the key decisions a contemporary company will make. The aim of the paper is to present a solution to this problem using the Solver add-on. In the case study discussed in the paper, the company’s central warehouse location was selected based on the classic location theory, which addresses the need to minimize the cost of transport....
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Wpływ stosowanych praktyk rolniczych na dopływ wód podziemnych oraz azotanów do Zatoki Puckiej
PublicationEutrophication of marine basins associated with submarine groundwater discharge is currently one of the most important challenges in modern coastal hydrogeology, and is classified as a serious global environmental problem. A particular source of groundwater pollution is agricultural activity, which is commonly carried out in the coastal zone. Research was conducted on a representative part of the Bay of Puck watershed, dominated...
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Wpływ parametrów konstrukcyjnych sprzęgieł mokrych i ich sterowania na zmiany wybranych wielkości fizycznych w trakcie zmian przełożenia przekładni mechanicznej
PublicationPrzedmiotem rozprawy doktorskiej jest analiza wpływu parametrów konstrukcyjnych i sterowania sprzęgłami ciernymi na zmiany wybranych wielkości fizycznych w trakcie zmiany przełożenia dwubiegowej przekładni mechanicznej typu Powershift. W ramach rozprawy przedstawiono znane rozwiązania skrzyń biegów maszyn roboczych. Szczególną uwagę poświęcono skrzyniom Powershift i stosowanych w nich rozwiązaniach sterowania sprzęgłami. Ponadto...
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Torque capacity of multidisc wet clutch with reference to friction occurrence on its spline connections
PublicationIn this article developed mathematical model that includes friction occurrence on spline connections is presented. The work also contains results of experimental research on torque capacity of multidisc wet clutch. These results are expressed as a function of contact pressure for different number of friction surfaces. Due to increased interest in research concerning multidisc wet clutches it is essential to determine impact of...
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Pressure in charge. Neglected parameter in hydrothermal synthesis turns out to be crucial for electrochemical properties of ammonium vanadates
PublicationAmmonium vanadates are of great interest as they exhibit unusual electrical and sensory properties.(NH4)2V6O16and (NH4)2V10O25$8H2O with various morphology were obtained in the hydrothermalsynthesis under controlled temperature and pressure. It was shown, that the pure (NH4)2V10O25$8H2Owas obtained under 50 bar of initial pressure, whereas lower pressure lead to the mixture of twocompounds. The influence of the pressure was studied...
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Synthesis of functionalized new conjugates of batracylin with tuftsin/ retro-tuftsin derivatives and their biological evaluation
PublicationNew batracylin conjugates with tuftsin/retro-tuftsin derivatives were designed and synthesized using T3P as a coupling agent. The conjugates possess an amide bond formed between the carboxyl group of heterocyclic molecule and the N-termini of the tuftsin/retro-tuftsin chain. The in vitro cytotoxic activity of the new analogues and their precursors was evaluated using a series of human and murine tumor cells. BAT conjugates containing...
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Database systems for tomorrow: new challenges and research areas
PublicationZaprezentowano nowe obszary badawcze w dziedzinie baz danych, które będą rozwijane w najbliższej przyszłości. Omówiono takie obszary jak systemy typu ''Plug and Play'', duże systemy sfederowane, nowe architektury systemów baz danych oparte na dużych buforach pamięciowych, integracja danych i aplikacji oraz bazy danych semistrukturalnych.
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Charakterystyka przewodnika jonowego BaCe0,8Y0,1Zr0,1O3
PublicationPublikacja przedstawia wyniki badań domieszkowanego cerianu baru.
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Immunizing the Hillcast Method against the Known-Plaintext Attack using Periodic Key Exchange
PublicationThis paper considers a Joint Fingerprinting and Decryption method, called Hillcast, for the copyright protection and traitor tracing in case of Video on Demand services. Because the method is based on the Hill cipher, it is vulnerable to a known-plaintext attack. The goal of this paper is to present an efficient periodic key exchange mechanism to make this method secure without compromising its scalability, imperceptibility or...
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Towards Cognitive and Perceptive Video Systems
PublicationIn this chapter we cover research and development issues related to smart cameras. We discuss challenges, new technologies and algorithms, applications and the evaluation of today’s technologies. We will cover problems related to software, hardware, communication, embedded and distributed systems, multi-modal sensors, privacy and security. We also discuss future trends and market expectations from the customer’s point of view.
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MSRL 2.0. as a new method for research education on urban issues
PublicationThe MSRL 2.0. research is focused on the Baltic Sea Region (BSR) as a multidimensional urban phenomenon with Gdansk acting as a hub for the research teams. The idea of the MSRL 2.0. is to promote the collaboration of professionals and graduate and PhD students by bringing together the mentor(s) with a local research team sharing experiences and proposing strategic recommendations to strengthen sustainable urban development initiatives...
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Vibration surveillance for efficient milling of flexible details fixed in adjustable stiffness holder
PublicationThe paper presents the results of research related to the possibility of using an intelligent workpiece holder with adjustable stiffness, during end milling process. Machining a one side supported flexible workpiece will be performed with constant spindle speed and feed speed. In order to avoid hazardous vibration, stiffness of the especially designed spring (mounted in a workpiece holder) will be modified off-line. In order to...
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Nanosorbents as Materials for Extraction Processes of Environmental Contaminants and Others
PublicationThe aim of this work focuses on the application of nanomaterials (NMs) in different sorp- tive extraction techniques for the analysis of organic contaminants from environmental samples of distinct matrix compositions. Without any doubt, the integration of specific NMs such as carbona- ceous nanomaterials, magnetic nanoparticles (MNPs), metal–organic frameworks (MOFs), silica na- noparticles, and ion-imprinted NPs with so lid-phase...
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Effect of Cyclodextrins on Coupling of o-Ethoxybenzenediazonium Salt with Pyrrole, Imidazole and 2-Methylimidazole
PublicationThe effect of b-cyclodextrin on o-ethoxybenzenediazonium salt coupling with pyrrole, imidazole and 2-methylimidazole has been studied. The differences in the reaction course, the overall yield and products distribution have been analyzed. Experiments without cyclodextrins and selected reactions with a- and c-cyclodextrins have been performed for comparison. The results are discussed in terms of co-conformation of azole molecules...
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Structure and transport properties of proton-conducting BaSn 0.5 In 0.5 O 2.75 and A-site substituted Ba 0.9 Ln 0.1 Sn 0.5 In 0.5 O 2.8 (Ln = La, Gd) oxides
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Defected Ag/Cu-MOF as a modifier of polyethersulfone membranes for enhancing permeability, antifouling properties and heavy metal and dye pollutant removal
PublicationIn this study, a novel bimetallic metal-organic framework (MOF) i.e. Ag/Cu-MOF was synthesized using a solvothermal method and later incorporated at different concentrations (0.1–2 wt%) using a phase inversion method for modification and antifouling property improvement of polyethersulfone (PES) membranes. The resulting Ag/Cu-MOF characteristics were investigated using different techniques, such as FTIR, XRD, FE-SEM and EDX. The...
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Application of Knowledge Views = Zastosowanie widoków na bazę wiedzy
PublicationW artykule przedstawiono koncepcję widoków na bazę wiedzy i jej zastosowanie w inżynierii systemów. Praca ma na celu przybliżenie inżynierii wiedzy i technologii Semantic Web inżynierowi oprogramowania oraz programiście. Cel ten osiągany jest poprzez upodobnienie baz wiedzy do relacyjnych lub obiektowych baz danych oraz poprzez stosowanie wzorców znanych w inżynierii oprogramowania.
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Waves Along Fractal Coastlines: From Fractal Arithmetic to Wave Equations
PublicationBeginning with addition and multiplication intrinsic to a Koch-type curve, we formulate and solve wave equation describing wave propagation along a fractal coastline. As opposed to examples known from the literature, we do not replace the fractal by the continuum in which it is embedded. This seems to be the first example of a truly intrinsic description of wave propagation along a fractal curve. The theory is relativistically...
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Język KQL jako realizacja idei języka SQL dla bazy wiedzy
PublicationW ramach inicjatywy semantic web rozwijane są systemy wnioskowania z wiedzy. Ciągle otwartym problemem są również języki dostępu do takich systemów. W artykule zaproponowano nowy język dostępu do zmodularyzowanych baz wiedzy, o cechach umożliwiających jego kompleksowe wykorzystanie w systemach zarządzania wiedzą, w sposób analogiczny do wykorzystania języka sql w systemach relacyjnych baz danych.
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KQL as Application of SQL Rationale for Knowledge Bases
PublicationW ramach inicjatywy Semantic Web rozwijane są systemy wnioskowania z wiedzy. Ciągle otwartym problemem są również języki dostępu do takich systemów. W artykule zaproponowano nowy język dostępu do zmodularyzowanych baz wiedzy, o cechach umożliwiających jego kompleksowe wykorzystaniew systemach zarządzania wiedzą, w sposób analogiczny do wykorzystania języka SQL w systemach relacyjnych baz danych.
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Koncepcja, realizacja i analiza nowego typu silnika piezoelektrycznego o strukturze wielokomórkowej
PublicationDotychczasowe wyniki badań w obszarze aktuatorów piezoelektrycznych, wskazują ich potencjalnie duże możliwości w przyszłych zastosowaniach specjalnych. W artykule przedstawiono proces projektowania nowego typu silnika piezoelektrycznego. Opisane zostały wybrane topologie maszyn piezoelektrycznych. Przedstawiono wady i zalety silnika ultrasonicznego z falą biegnącą oraz silnika o ruchu obrotowym. W ramach realizacji projektu...
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Accelerometer-based Human Activity Recognition and the Impact of the Sample Size
PublicationThe presented study focused on the recognition of eight user activities (e.g. walking, lying, climbing stairs) basing on the measurements from an accelerometer embedded in a mobile device. It is assumed that the device is carried in a specific location of the user’s clothing. Three types of classifiers were tested on different sizes of the samples. The influence of the time window (the duration of a single trial) on selected activities...
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Realization, programming and controlling of the Stewart-Gough platform
PublicationThis paper presents realizaon, programming, and controlling of a low cost Stewart-Gough plaorm (SGP) with rotary actuators. The realized SGP is applied in a ball & plate control system. Developed dedicated software consists of embedded and applicaon soware for both the SGP posioning system and the ball & plate control. system. A ball posion is being obtained using computer vision. The paper contains tests results for both an SGP...
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The content of biogenic amines in Rondo and Zweigelt wines and correlations between selected wine parameters
PublicationThe purpose of this study was to evaluate the content of biogenic amines (BAs) in wines using dispersive liquid–liquid microextraction–gas chromatography–mass spectrometry (DLLME-GC–MS). An additional objective was to assess the correlations between selected parameters characterizing the samples such as the content of BAs, sugars, and organic acids, pH, and total acidity. Wines produced from the same grape variety in which alcoholic...
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Synthesis and biological evaluation of novel analogues of batracylin with synthetic amino acids and adenosine: an unexpected effect on centromere segregation in tumor cells through a dual inhibition of topoisomerase IIa and Aurora B
PublicationIn the search for new anticancer agents we designed and synthesized batracylin derivatives with linking synthetic amino acid side chains of different lengths and adenosine. Unexpectedly, we have found that in water and the culture media adenosine–amino acid–BAT conjugates form supramolecular structures and this prevents these compounds from entering cells. Consequently, these compounds exerted no biological activity when tested...
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Digital Government and Administrative Burden Reduction
PublicationAdministrative burden represents the costs to businesses, citizens and the administration itself of complying with government regulations and procedures. The burden tends to increase with new forms of public governance that rely less on direct decisions and actions undertaken by traditional government bureaucracies, and more on government creating and regulating the environment for other, non-state actors to jointly address public...
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Automatyzacja procesu pozyskiwania wiedzy dla systemów ekspertowych.**2003,187 s. 24 rys. 7 tab. bibliogr. 248 poz. Rozprawa doktorska (2003.12.02) PG, Wydz. Elektroniki, Telekomunikacji i Aytomatyki. Promotor: Prof. dr. hab. M. Białko
PublicationPodczs tworzenia systemow ekspertowych występuje problem pozyskania wiedzy zdanej dziedziny. Duże korzyści daje zastosowanie szkieletowych systemów eks-pertowych z wbudowanym modulem automatycznego pozyskiwania wiedzy z istnie-jacych baz danych. Zbudowano i opisano w pracy system CLIPS-XT posiadajacyoryginalne moduły: indukcyjnego wydobywania wiedzy z baz danych za pomocą generowania drzew decyzyjnych i ich konwersji na reguły...
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Example applications of control charts as a quality tool for statistical process control in a small manufacturing company
PublicationPraca zawiera przykład wdrożenia kart kontrolnych w małym zakładzie produkcyjnym zajmującym się wytwarzaniem komponentów z blach. Pokazano jak z zastosowaniem dostępnego pakietu biurowego, można stworzyć statystyczną kontrolę procesu(SPC)w małej firmie. Artykuł zawiera wyniki z przykładowych analizowanych procesów.
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SOCIALLY INVOLVED ARCHITECTURE � MODEL SOLUTIONS OF LUBUSKIE VOIVODESHIP
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MODEL OF COOPERATION IN CREATING SOCIALLY ENGAGED URBAN SPACE � THE ROLE OF LOCAL PARTICIPATION
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ESTIMATION OF NONSTATIONARY HARMONIC SIGNALS AND ITS APPLICATION TO ACTIVE CONTROL OF MRI NOISE
PublicationA new adaptive comb filtering algorithm, capable of tracking the fundamental frequency and amplitudes of different frequency components of a nonstationary harmonic signal embedded in white measurement noise, is proposed. Frequency tracking characteristics of the new scheme are studied analytically, proving (under Gaussian assumptions and optimal tuning) its statistical efficiency for quasi-linear frequency changes. Laboratory tests...
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Macroscopic models for quantum systems and computers
PublicationOpisano układy makroskopowe realizujące dwubitowe operacje kwantowe.