Filters
total: 16449
-
Catalog
- Publications 14164 available results
- Journals 69 available results
- Conferences 18 available results
- People 129 available results
- Inventions 12 available results
- Projects 9 available results
- Research Teams 2 available results
- e-Learning Courses 136 available results
- Events 9 available results
- Open Research Data 1901 available results
displaying 1000 best results Help
Search results for: abused substance
-
Deep learning-based waste detection in natural and urban environments
Publication -
SMOTE-Based Homogeneous Ensemble Methods for Software Defect Prediction
Publication -
Ensemble-Based Logistic Model Trees for Website Phishing Detection
Publication -
The Role and Effectiveness of the MBT Installation in Poland Based on Selected Examples
Publication -
Assessment of water quality based on multiparameter fiber optic probe
Publication -
A Family Of Multicore 0ptical Fibre Based Sensors And Instrumentation Systems
Publication -
Software layer for FPGA-based TESLA cavity control system
Publication -
FPGA-based cavity simulator and controller for TESLA test facility
Publication -
Validation of an Agent and Ontology-based Information Technology Assessment System
PublicationThe aim of this paper is to present a new method of the validation of an Agent and Ontology-based Information Technology Assessment System. In the introduction part of the paper, the characteristics of the proposed multi-agent system are presented. Next, some important details regarding the ontology functionality of this system are described and an approach to its verification process is proposed. The approach employs semantic...
-
Improvement of damage detection methods based on experimental modal parameters
PublicationW pracy przedstwiono sposoby porawy czułości metod detekcji uszkodzeń wykorzystujacych eksperyentalne parametry modalne konstrukcji. Wykazano, że zastosowanie zawansowanych technik obróbki sygnałów pomiarowych pozwala zdecydowanie poprwaić skutecznośc znanych z literatury metod.
-
Frequency based criterion for distinguishing tonal and noisy spectral components
PublicationA frequency-based criterion for distinguishing tonal and noisy spectral components is proposed. For considered spectral local maximum two instantaneous frequency estimates are determined and the difference between them is used in order to verify whether component is noisy or tonal. Since one of the estimators was invented specially for this application its properties are deeply examined. The proposed criterion is applied to the...
-
Theoretical study of polymerization mechanism of p-xylylene based polymers
PublicationObliczenia kwantowe mechanizmu polimeryzacji parylenów, opartych o cząsteczki p-ksylilenów. Praca zawiera wyniki szczegółowych obliczeń wszystkich etapów polimeryzacji, wnioski dotyczące znalezionych stanów kwantowych i energetyki poszczególnych etapów procesu.
-
TiO2-based photocatalysts in indoor swimming pool air purification
PublicationWzrastająca ilość basenów kąpielowych i aquaparków jest obecnie wyzwaniem dla naukowców zajmujących się badaniem i kontrolowaniem powietrza hali basenowej. Mikroorganizmy powstałe w powietrzu hali stanowią ogromne zagrożenie dla zdrowia. Ponadto, w fazie gazowej obecne są także uboczne produkty dezynfekcji (DBP), które mogą mieć szkodliwy wpływ zarówno na kąpiących się, jak i personel. W pracy omówiono potencjalne zagrożenia spowodowane...
-
Sensitivity to nitrogen dioxide of electrocatalytic gas sensor based on NASICON
PublicationW pracy przedstawiono wyniki badań czujnika elektrokatalitycznego na bazie NASICONu.
-
Autonomous, Ground Based, Self-Organizing Radiolocation Systems - AEGIR
PublicationThis article describes the construction and operation of autonomous ground-based radiolocation system that was developed as a technology demonstrator at the Technical University of Gdansk. Preliminary results and conclusions will be presented as well as analysis of its effectiveness. There will be also described the basic blocks of the system.
-
Effects of Sr/Ti stoichiometry in SrTiO3-based SOFC anodes
PublicationScharakteryzowano wpływ stechiometrii Sr/Ti na właściwości strukturalne, elektryczne i mechaniczne anod na bazie tytanianu strontu. Wyjaśniono genezę niektórych zjawisk w oparciu o chemię defektów związków niestechiometrycznych na bazie istniejących pozycji literaturowych.
-
Effect of oxygenation time on signal of a sensor based on ionic liquids
PublicationThe paper presents an oxygen sensor based on ionic liquids and solid electrodes. The following ionic liquids have been employed: [BMIM][BF4], [HMIM][Cl], [BMIM][N(CN2)]. Minimum time of the sensor exposure to analyte, after which the signal (current intensity) was stable, has been evaluated. An impact of volumetric flow rate of analyte on the sensor exposure time and signal has been determined. A product of permeability coefficient...
-
Quality Evaluation of Novel DTD Algorithm Based on Audio Watermarking
PublicationEcho cancellers typically employ a doubletalk detection (DTD) algorithm in order to keep the adaptive filter from diverging in the presence of near-end speech signal or other disruptive sounds in the microphone signal. A novel doubletalk detection algorithm based on techniques similar to those used for audio signal watermarking was introduced by the authors. The application of the described DTD algorithm within acoustic echo cancellation...
-
Viewpoint independent shape-based object classification for video surveillance
PublicationA method for shape based object classification is presented.Unlike object dimension based methods it does not require any system calibration techniques. A number of 3D object models are utilized as a source of training dataset for a specified camera orientation. Usage of the 3D models allows to perform the dataset creation process semiautomatically. The background subtraction method is used for the purpose of detecting moving objects...
-
Chemiresistive gas sensors based on carbon nanotubes - fabrication and application
PublicationOpisano przygotowanie i możliwości zastosowania chemirezystancyjnych czujników gazów wykonanych z nanorurek węglowych.
-
Identification of volatile compounds based on the electrocatalytic gas sensor responses
PublicationMeasured response in case of electrocatalytic gas sensors is in form of a voltamperometric characteristic. Current-voltage (I-V) response shape depends on the gas type and its concentration. Such response contains significantly more information comparing with typical electrochemical sensors, but is quite difficult to analyze. When I-V curve contains current peaks, position of such peaks can be used...
-
Distributed System For Noise Threat Evaluation Based On Psychoacoustic Measurements
PublicationAn innovative system designed for the continuous monitoring of acoustic climate of urban areas was presentedin the paper. The assessment of environmental threats is performed using online data, acquired through a grid ofengineered monitoring stations collecting comprehensive information about the acoustic climate of urban areas.The grid of proposed devices provides valuable data for the purpose of long and short time acoustic climateanalysis....
-
A closed loop thermosyphon with conventional or minichannel based condenser and evaporator
PublicationPrzedstawiono uogólniony model termosyfonu, który może być rozpatrywany dla szeregu wariantów.Model opiera się na jednowymiarowych równanich masy, pędu i energii. Rozpatrzono dwa przypadki termosyfonu, tj. grzanie strony pionowej i chłodzenie strony pionowej oraz drugi, gdzie termosyfon jest ogrzewany na stronie pionowej a chłodzony na poziomej.
-
Comments on ''an SVD-based watermarking scheme for protecting rightful ownership''
PublicationW pracy wykazano, że algorytm zaproponowany w komentowanym artykule nie ma wartości praktycznej, gdyż charakteryzuje się bardzo dużym prawdopodobieństwem fałszywej akceptacji.
-
Knowledge management based on formal models of software project management
PublicationCelem pracy jest prezentacja kompletnej koncepcji systemów wspierania decyzji w zarządzaniu projektami informatycznymi. Pomysł oparty jest na dynamicznych i samo nastrajających się modelach regułowo-rozmytych. W szczególności proponowane podejście wykorzystuje koncepcje metodologii opartych wiedzy oraz teorii układów dynamicznych oraz zbiorów rozmytych. Zastosowania tego opracowania znajdują się w obszarze wytwarzania produktów...
-
A concept of the mechatronics course based on an idea of multi-chair incorporation
PublicationPraca poświęcona jest jednemu ze sposobów poprawy jakości kształcenie w zakresie inżynierii mechanicznej, na przykładzie Wydziału Mechanicznego Politechniki Gdańskiej. Polega on na uruchomieniu oraz samodzielnym prowadzeniu nowego kierunku studiów Mechatronika. Koncepcja aktywności wielokatedralnej programu studiów jest obiecującym rozwiązaniem prowadzącym do wysokiego poziomu kształcenia
-
Antibacterial activity of gelatin-based films incorporated with chitosan or silver
PublicationFolie żelatynowe z dodatkiem srebra jonowego powodowały redukcję komórek Escherichia coli i Staphylococcus aureus o 90% pod powierzchnią folii. Nie obserwowano natomiast strefy zahamowania wzrostu dookoła krążków folii. W przypadku filmów chitozanowych lub żelatynowo-chitozanowych ich przeciwdrobnoustrojowa aktywność zależała od stopnia deacetylacji chitozanu.
-
A low complexity double-talk detector based on the signal envelope
PublicationA new algorithm for double-talk detection, intended for use in the acoustic echo canceller for voice communication applications, is proposed. The communication system developed by the authors required the use of a double-talk detection algorithm with low complexity and good accuracy. The authors propose an approach to doubletalk detection based on the signal envelopes. For each of three signals: the far-end speech, the microphone...
-
Hearing aid fitting method based on fuzzy logic processing
PublicationWażnym etapem dopasowania współczesnych aparatów słuchowych jest wyznaczanie charakterystyki dynamiki słuchu. Charakterystyka ta wyznaczana jest na podstawie wyników testu skalowania głośności. Niestety wyniki te wyrażone są w skali kategorii głośności, natomiast aparaty słuchowe wymagają para-metrów numerycznych. Problem ten można rozwiązać za pomocą logiki rozmytej. W niniejszym referacie przedstawiono metodę przetwarzania rozmytego...
-
Hearing aid fitting method based on fuzzy logic processing
PublicationWażnym etapem dopasowania współczesnych aparatów słuchowych jest wyznaczanie charakterystyki dynamiki słuchu. Charakterystyka ta wyznaczana jest na podstawie wyników testu skalowania głośności. Niestety wyniki te wyrażone są w skali kategorii głośności, natomiast aparaty słuchowe wymagają para-metrów numerycznych. Problem ten można rozwiązać za pomocą logiki rozmytej. W niniejszym referacie przedstawiono metodę przetwarzania rozmytego...
-
Respiratory system modelling and simulation based on the forced oscillation technique
Publication.
-
Universities in a knowledge-based society - their role and challenges they have to face
PublicationArtykuł opisuje rolę instytucji edukacyjnych wraz z problemami i wyzwaniami, którym muszę one sprostać w gospodarce opartej na wiedzy.
-
Sensitivity evaluation of Krakowiec clay based on time-dependent behavior
Publication -
Auditory-model based robust feature selection for speech recognition
Publication -
Chemometric analysis for optimizing derivatization in gas chromatography-based procedures
Publication -
Analysis of geometrical layout of tram tracks based on the railway methods
Publication -
Problems in estimation of hand grip force based on EMG signal
PublicationThere has recently been a significant increase in the number of publications on and applications of bioelectric signals for diagnostic purposes. While the use of ECG (electrocardiography) is not surprising, the use of signals from registration of brain activity (EEG) and muscles activity (EMG) still finds new applications in various fields. The authors focus on the use of EMG signals for estimating hand grip force. Currently,...
-
Offshore project management based on jack-up rig conversion
PublicationChapter presents aspects of Offshore project management during conversion drilling rig to accommodation rig in Batam Indonesia
-
Design and modeling of the piezoelectric motor based on three resonance actuators
PublicationThis paper describes a piezoelectric motor which combines advantages from two existing piezoelectric motors topologies. The research work presents the design, simulations and measurements of the piezoelectric motor with three rotation-mode actuators. The aim of the project was to obtain the high speed piezoelectric motor. Other advantages of this conception are blocking torque, short response times, the ability to work in a hostile...
-
Spectrum-based modal parameters identification with Particle Swarm Optimization
PublicationThe paper presents the new method of the natural frequencies and damping identification based on the Artificial Intelligence (AI) Particle Swarm Optimization (PSO) algorithm. The identification is performed in the frequency domain. The algorithm performs two PSO-based steps and introduces some modifications in order to achieve quick convergence and low estimation error of the identified parameters’ values for multi-mode systems....
-
Acceptance Testing of Software Products for Cloud-Based On-Line Delivery
PublicationSoftware products intended for on-line delivery by distributors serving an open community of subscribers are developed in a specific life-cycle model, in which roles of the major stakeholders are strongly separated, unlike in any other software development model known in software engineering. Its specificity underlines the fact that a distributor of the final product, responsible for its acceptance for publication and delivery...
-
A Centralized Reputation System for MANETs Based on Observed Path Performance
PublicationA reputation system for MANETs is described that attempts to deduce nodal trustworthiness (forwarding behaviour) from observed end-to-end path performance. The trustworthiness deduction algorithm produces interval estimates and works well if node misbehaviour is not selec-tive with respect to traversing paths. Nodal reputation levels are next calculated in the spirit of generous tit-for-tat so as to best reflect momentary nodal...
-
Serendipitous Recommendations Through Ontology-Based Contextual Pre-filtering
PublicationContext-aware Recommender Systems aim to provide users with better recommendations for their current situation. Although evaluations of recommender systems often focus on accuracy, it is not the only important aspect. Often recommendations are overspecialized, i.e. all of the same kind. To deal with this problem, other properties can be considered, such as serendipity. In this paper, we study how an ontology-based and context-aware...
-
A Semiautomatic Experience-Based Tool for Solving Product Innovation Problem
PublicationIn this paper we present the idea of Smart Innovation Engineering (SIE) System and its implementation methodology. The SIE system is semi-automatic system that helps in carrying the process of product innovation. It collects the experiential knowledge from the formal decisional events. This experiential knowledge is collected from the group of similar products having some common functions and features. The SIE system behaves like...
-
Hazard Control in Industrial Environments: A Knowledge-Vision-Based Approach
PublicationThis paper proposes the integration of image processing techniques (such as image segmentation, feature extraction and selection) and a knowledge representation approach in a framework for the development of an automatic system able to identify, in real time, unsafe activities in industrial environments. In this framework, the visual information (feature extraction) acquired from video-camera images and other context based gathered...
-
Block-based Representation of Application Execution on Modern Parallel Systems
PublicationThe chapter presents how to model execution of a parallel computational application that is to be executed in a large-scale parallel or distributed environment with potentially thousands to millions of execution units. The representation uses pre- viously attributes and factors representative of modern high performance systems including multicore CPUs, GPUs, dedicated accelerators such as Intel Phi.
-
Video Analytics-Based Algorithm for Monitoring Egress from Buildings
PublicationA concept and practical implementation of the algorithm for detecting of potentially dangerous situations of crowding in passages is presented. An example of such situation is a crush which may be caused by obstructed pedestrian pathway. Surveillance video camera signal analysis performed on line is employed in order to detect hold-ups near bottlenecks like doorways or staircases. The details of implemented algorithm which uses...
-
Generative Process Planning with Reasoning based on Geometrical Product Specification
PublicationThe focus of this paper is on computer aided process planning for parts manufacture in systems of definite process capabilities, involving the use of multi-axis machining centers for parts shaping and grinding machines for finishing. It presents in particular a decision making scheme for setup determination as a part of generative process planning. The planning procedurę consists of two stages. The first stage is associated with...
-
Digital fingerprinting for color images based on the quaternion encryption scheme
PublicationIn this paper we present a new quaternion-based encryption technique for color images. In the proposed encryption method, images are written as quaternions and are rotated in a three-dimensional space around another quaternion, which is an encryption key. The encryption process uses the cipher block chaining (CBC) mode. Further, this paper shows that our encryption algorithm enables digital fingerprinting as an additional feature....
-
A CMRC-based compact rat-race coupler with harmonic suppression
PublicationIn this paper, an eective miniaturization technique exploiting compact microstrip resonant cells has been discussed and experimentally validated on the basis of a 3-dB microstrip rat-race coupler. The application of the method proposed has resulted in 91 % circuit area reduction in comparison to a conventional rat-race coupler. Experimental results show good agreement with theoretical characteristics, as well as an additional eect,...