Search results for: geo-localisation

• Modeling of strain localization in granular and quasi-brittle materials

  Publication

  • J. Tejchman

  - Year 2008

  W artykule przedstawiono wyniki symulacji lokalizacji odkształceń w materiałach granulowanych i kruchych. Zasosowano różne modele w ramach mechaniki ośrodków ciągłych i dyskretnych. Wyniki obliczeń porównano z doswiadczeniami.

• MultiRegional PCA for leakage detection and localisation in DWDS - Chojnice case study

  Publication

  • K. Jezior
  • K. Mazur
  • A. Borowa
  • M. Grochowski
  • M. Brdyś

  - Year 2007

  This chapter considers pipe leakage detection and localisation in Drinking Water Distribution Systems (DWDS) by using a novel approach the MultiRegional Principal Component Analysis (MR-PCA). The MR-PCA is an extension of well known PCA method. The main idea of MR-PCA consists in designing a number of regional PCA models and analysing their responses caused by the pipe faults. Moreover, DWDS is decomposed into suitable subnetworks...

• Detection and localisation of corrosion process effect by means of acoustic emission technique

  Publication

  • K. Darowicki
  • A. Mirakowski

  - Year 2005

  W pracy przedstawiono możliwość wykorzystania techniki emisji akustycznej do detekcji i lokalizacji skutków procesu korozyjnego - wycieku. Wyniki badań wykonanych w warunkach laboratoryjnych, zbliżonych do rzeczywistych, potwierdziły akustyczne wykrycie oraz ustalenie położenia wycieku. Położenie wycieku obliczono również na podstawie techniki interkorelacji i porównano z lokalizacją uzyskaną bezpośrednio z pomiarów akustycznych....

• International Journal of Globalisation and Small Business

  Journals

  ISSN: 1479-3059

• The Geo-Economics Approach to the European Union Strategic Partnership in the Indo-Pacific Region

  Publication

  • M. Bharti

  - Year 2023

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• The geo-economic approach to the European Union’s strategy for cooperation in the Indo-Pacific region

  Publication

  • M. Bharti

  - Stosunki Międzynarodowe – International Relations - Year 2023

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• Geo-Questionnaire for Environmental Planning: The Case of Ecosystem Services Delivered by Trees in Poland

  Publication

  • P. Przewoźna
  • A. Inglot
  • M. Mielewczyk
  • K. Mączka
  • P. Matczak
  • P. Wężyk

  - Data - Year 2021

  Studies on society and the environment interface are often based on simple questionnaires that do not allow for an in-depth analysis. Research conducted with geo-questionnaires is an increasingly common method. However, even if data collected via a geo-questionnaire are available, the shared databases provide limited information due to personal data protection. In the article, we present open databases that overcome those limitations....

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• Localization of ferromagnetic objects via magnetometric method near equator

  Publication

  • M. Wołoszyn
  • P. Jankowski

  - Year 2006

  Istnieje wiele metod wykrywania ukrytych w ziemi obiektów. Metody te można podzielić na pasywne i aktywne. Do metod pasywnych należy metoda magnetometryczna. Obiekt ferromagnetyczny zaburza w swoim otoczeniu równomierność pola magnetycznego. Korzystając z metody magnetometrycznej można to zaburzenie zmierzyć i wykryć obiekt. W pracy przedstawiono nową metodę lokalizacji obiektów ferromagnetycznych metodą magnetometryczną znajdujących...

• Identification and localization of organic coating degradation onset by impedance imaging

  Publication

  • M. Szociński
  • K. Darowicki
  • K. Schaefer-Rychel

  - POLYMER DEGRADATION AND STABILITY - Year 2010

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• Localization in wireless sensor networks using switched parasitic antennas

  Publication

  • M. Sułkowska
  • K. Nyka
  • Ł. Kulas

  - Year 2010

  A switched parasitic monopole antenna for 2.4 GHz ISM applications is design and investigated in this paper. One of the most promising applications for such switched-beam antennas is localization in wireless sensor networks (WSN). It is demonstrated that the use of this antenna improves accuracy of localization algorithms and allows for reduction of the number of reference nodes in localization system.

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• Localization of impulsive disturbances in audio signals using template matching

  Publication

  • M. Niedźwiecki
  • M. Ciołek

  - DIGITAL SIGNAL PROCESSING - Year 2015

  In this paper, a new solution to the problem of elimination of impulsive disturbances from audio signals, based on the matched filtering technique, is proposed. The new approach stems from the observation that a large proportion of noise pulses corrupting audio recordings have highly repetitive shapes that match several typical “patterns”. In many cases a representative set of exemplary pulse waveforms can be extracted from the...

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• Implementation of localization and identification of ferromagnetic objects algorithm in labview enviroment

  Publication

  • M. Chomnicki
  • J. Łubkowski
  • M. Wołoszyn

  - Poznan University of Technology Academic Journals. Electrical Engineering - Year 2011

  The problem with detecting dangerous objects is still a matter of concern today. One of the methods of detecting dangerous objects is the magnetic method. While measuring a magnetic field in the surrounding of objects with ferromagnetic properties, it is possible to detect, localize and identify such object.

• Comparative modeling of shear localization in granular bodies with FEM and DEM

  Publication

  • Ł. Widuliński
  • J. Kozicki
  • J. Tejchman

  - Year 2010

  The intention of the paper is to compare the calculations of shear zones in granular bodies using two different approaches: a continuum and a discrete one. In the first case, the FEM based on a micro-polar hypoplastic constitutive law was used. In the second case, the DEM was taken advantage of, where contact moments were taken into account to model grain roughness. The comparative calculations were performed for a passive case...

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• Effect of cyclic deformations on the evolution of localizations in granularbodies

  Publication

  • J. Tejchman

  - Year 2003

  Artykuł omawia wpływ cyklicznych odkształceń na lokalizacje odkształceń stycznych w materiałach granulowanych. Obliczenia wykonano metodą elementów skończonych na bazie mikropolarnego hipoplastycznego prawa konstytutywnego. Obliczenia wykonano dla dużej amplitudy odkształceń cyklicznych i materiału zagęszczonego.

• ISPRS International Journal of Geo-Information

  Journals

  ISSN: 2220-9964

• The new version of contact-less method for localisation of catenary contact wire – theoretical assumption

  Publication

  • J. Skibicki

  - Przegląd Elektrotechniczny - Year 2013

  This article presents the theoretical basic of a new version of contact-less method for localising the catenary contact wires, using the advanced video techniques and image analysis. So far, contact line diagnostic systems exploited nowadays uses the contact measuring methods with special design current collector. This solutions make it impossible to measure the contact line geometry in a static way. The proposed measurement method...

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• Investigation of the Membrane Localization and Interaction of Selected Flavonoids by NMR and FTIR Spectroscopy

  Publication

  • J. Kapral-Piotrowska
  • J. Strawa
  • K. Jakimiuk
  • A. Wiater
  • M. Tomczyk
  • W. Gruszecki
  • B. Pawlikowska-Pawlęga

  - International Journal of Molecular Sciences - Year 2023

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• Application of colour image segmentation for localization and extraction text from images

  Publication

  • M. Pazio
  • K. Cisowski

  - Year 2005

  W otaczającym nas świecie informacja tekstowa odgrywa wielką rolę. W postaci tekstowej podawane są: nazwy ulic, nazwy sklepów i instytucji, opisy przedmiotów np. tytuły książek, opakowań itp. Jednocześnie współczesne programy komputerowe służące do rozpoznawania tekstu (OCR) ''nie radzą sobie'' z analizą obrazów otrzymanaych za pomocą kamer. Segmentacja obrazu z następującą kontekstową analizą parametrów segmentów może dostarczyć...

• Accuracy analysis of the RSSI BLE SensorTag signal for indoor localization purposes

  Publication

  • M. Kaczmarek
  • J. Rumiński
  • A. Bujnowski

  - Year 2016

  In this paper we describe possibility of use the RSSI signal (Radio Signal Strength Indication) from Texas Instruments SensorTag CC2650 for indoor positioning purposes. This idea is not a new but in our opinion it is possible to use SensorTags with Bluetooth LE wireless interface for positioning inside buildings in such applications as people findings in hospitals, senior come care, etc. RSSI is mostly selected as the sensor localization...

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• Verification of ESPAR Antennas Performance in the Simple and Calibration Free Localization System

  Publication

  • M. Rzymowski
  • P. Woźnica
  • Ł. Kulas

  - Year 2013

  This paper presents the results of simulations and measurements of an indoor localization system that uses Electronically Steerable Parasitic Array Radiator (ESPAR) antennas with switched directional beam. Proposed antennas are dedicated for 2.4GHz ISM low-cost applications where determination of the incoming signal is required. The antennas performance is analyzed and verified with relation to positioning methods based on the...

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• Enhancing Performance of Switched Parasitic Antenna for Localization in Wireless Sensor Networks

  Publication

  • M. Rzymowski
  • K. Nyka
  • Ł. Kulas

  - Year 2012

  This paper presents an Electronically Steerable Parasitic Array Radiator (ESPAR) antenna with enhanced performance of estimating the incoming signal direction. Designed antenna is dedicated for 2.4 GHz ISM applications with emphasis on Wireless Sensor Networks (WSN). The limitations of the existing design approach are illustrated, as well as perspectives and challenges of the proposed solution in relation to the localization in...

• Innovative method of localization airplanes in VCS (VCS-MLAT) distributed system

  Publication

  • S. Wiszniewski

  - Year 2019

  The article presents the concept and the structure of the localization module. The prototype module is the part of the VCS (VCS-MLAT) localization distributed system. The device receives the audio signal transmitted in airplanes band (118 MHz – 136 MHz). Received data with the timestamps are send to the main server. The data from multiple devices estimates the localization of the airplane. The main aim of the project is the analysis...

• Calibration-Free Single-Anchor Indoor Localization Using an ESPAR Antenna

  Publication

  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - SENSORS - Year 2021

  In this paper, we present a novel, low-cost approach to indoor localization that is capable of performing localization processes in real indoor environments and does not require calibration or recalibration procedures. To this end, we propose a single-anchor architecture and design based on an electronically steerable parasitic array radiator (ESPAR) antenna and Nordic Semiconductor nRF52840 utilizing Bluetooth Low Energy (BLE)...

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• FE-modelling of strain localization in concrete with coupled elasto-plasticity and damage

  Publication

  • J. Bobiński
  • J. Tejchman

  - Year 2006

  W artykule przedstawiono wyniki numerycznej dla zginania belki betonowej przy zastosowaniu modelu sprężysto-plastycznego, modelu z degradacja sztywności i modelu połączonego sprężysto-plastycznego z degradacją sztywności. Wszystkie modele rozszerzono o długość charakterystyczną mikrostruktury za pomocą teorii nielokalnej.

• A Non-local elasto-plastic model to describe localisations of deformation in concrete

  Publication

  • J. Bobiński
  • J. Tejchman

  - TASK Quarterly - Year 2002

  Przedstawiono wyniki numerycznej symulacji lokalizacji odkształceń stosując metodę elementów skończonych na bazie nielokalnego prawa sprężysto-plastycznego dla betonu. Prawo wykorzystuje długość charakterystyczną. Obliczenia dla ściskania jednoosiowego pokazały, że wyniki numeryczne nie zależą od siatki MES. Osiągnięto pełną regularyzację problemu brzegowego.

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• Simulation of shear localization in granular bodies within gradient-enhanced hypoplasticity.

  Publication

  • J. Tejchman

  - Year 2004

  W artykule przedstawiono wyniki numerycznej analizy ściskania w płaskim stanie odkształcenia dla materiałów granulowanych. Obliczenia przeprowadzono z modelem hipoplastycznym rozszerzonym o gradienty modułu przyrostu odkształceń. Obliczenia wykonano dla różnych długości charakterystycznych w próbce piasku zagęszczonego.

• Modelling of localization of deformation in quasi-brittle materials with a continuum and discrete model

  Publication

  • J. Bobiński
  • J. Kozicki
  • J. Tejchman

  - Year 2005

  W artykule przedstawiono wyniki obliczeń lokalizacji odkształceń w materiałach kruchych przy zastosowaniu 2 modeli w ramach mechaniki ośrodka ciągłego i jednego modelu w ramach ośrodka dyskretnego. W przypadku pierwszy zastosowano model sprężysto-plastyczny i model zniszczeniowy rozszerzony o długość charakterystyczną mikrostruktury. W przypadku drugim przyjęto model rusztowy złożony z beleczek.

• Finite element modeling of shear localization in granular bodies in hypoplasticity with enhancements

  Publication

  • J. Tejchman

  - Year 2005

  W pracy omówiono wyniki numeryczne lokalizacji okształceń stycznych w materiałach granulowanych. Obliczenia wykonano stosując prawo hipoplastyczne z rozszerzeniami w ramach mechaniki ośrodka gradientowego, nielokalnego i mikropolarnego. Obliczenia przeprowadzono dla różnych problemów brzegowych z uwzględnieniem lokalizacji. Wyniki analiz porównano z doświadczeniami.

• Determining optimal gel sensitivity in optical CT scanning of gel dosimeters

  Publication

  • Y. Xu
  • C. Wuu
  • M. Maryanski
  • M. Maryański

  - MEDICAL PHYSICS - Year 2003

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• The Impact of urban Localizations on the Growth Possibilities for Small Firms

  Publication

  • J. Wasilczuk
  • K. Zięba

  - Year 2014

  The purpose of this study was to identify the differences in the profiles of firms and their owners in urban and non-urban locations and also to asses the impact of those differences on the possibilities of growth for firms from both types of locations. Findings: urban entrepreneurs are better educated, more experienced and more positively motivated. Their firms are more innovative, with more qualified employeesadn better access...

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• Globalisation and world economic poverty: The significance of hidden dimensions

  Publication

  • H. G. Adamkiewicz

  - Metody Ilościowe w Badaniach Ekonomicznych - Year 2013

  The aim of our research is to examine how individual dimensions of globalization affect economic poverty in the World. for this, regression models are estimated with FGT0 or FGT1 poverty measures as dependent variables and KOF indices of globalization as despendent variables. The poverty indices are estimated for 119 countries' income didtributions assuming log-normality and using Gini estimates from the WID2 database and GDP/capita...

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• Calibration images under different lighting conditions - static for feature localisation

  Open Research Data

  open access

  • P. Burdziakowski

  - series: Calibration Images

  Dataset description: Calibration images under different lighting conditions - static mode for feature detection

• A Web-GIS tool for diagnosing spatial orientation of young adults: design and evaluation of Geo-Survey

  Publication

  • M. Kulawiak
  • D. Krajnik
  • M. Czaplicka
  • A. Dawidowicz

  - Scientific Reports - Year 2023

  Spatial orientation is the effectiveness with which one is able to assess the mutual location of objects relative to a point of reference or a system of coordinates. Traditionally, this ability has been evaluated through field navigation tests, which do not take into account the prevailing influence of free online maps and virtual walks on a person’s interpretation of space. In this context, this study presents a Web-GIS tool designed...

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• Methods of improving accuracy of indoor localization systems based on 802.11 standard infrastructure

  Publication

  • P. Przytuła
  • K. Nyka
  • Ł. Kulas

  - Year 2008

  Artykuł dotyczy różnorodnych metod zwiększania dokładności istniejących już algorytmów lokalizacji, implementowanych w standardzie WLAN 802.11. W pracy przedstawiono nowatorskie rozwiązanie wykorzystujące elementy poprawiające dokładność, takie jak: algorytmy, adaptacja środowiska, filtrowanie sygnałów.

• Nucleoid localization of Hsp40 Mdj1 is important for its function in maintenance of mitochondrial DNA

  Publication

  • G. Ciesielski
  • M. Plotka
  • M. Manicki
  • B. Schilke
  • R. Dutkiewicz
  • C. Sahi
  • J. Marszalek
  • E. Craig

  - BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH - Year 2013

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• 60 GHz Microstrip Van Atta Arrays for Millimeter Wave Identification and Localization

  Publication

  • K. Trzebiatowski
  • M. Rzymowski
  • L. Kulas
  • K. Nyka

  - Year 2020

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• Cellular localization and putative role of aquaporin-2 Ser-261 in the bovine kidney

  Publication

  • K. Michałek
  • M. Grabowska
  • A. Lepczyński
  • K. Michałek

  - Journal of Animal and Feed Sciences - Year 2019

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• A comparative study of water distribution and dehydrin protein localization in maturing pea seeds

  Publication

  • M. Garnczarska
  • T. Zalewski
  • Ł. Wojtyla

  - Journal of Plant Physiology - Year 2008

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• Application of passive acoustic radar to automatic localization, tracking and classification of sound sources

  Publication

  • J. Kotus

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Year 2010

  A concept, practical realization and applications of the passive acoustic radar to automatic localization, tracking and classification of sound sources were presented in the paper. The device consists of a new kind of multichannel miniature sound intensity sensors and a group of digital signal processing algorithms. Contrary to active radars, it does not emit the scanning beam but after receiving surrounding sounds it provides...

• Multiple sound sources localization in free field using acoustic vector sensor

  Publication

  • J. Kotus

  - MULTIMEDIA TOOLS AND APPLICATIONS - Year 2015

  Method and preliminary results of multiple sound sources localization in free field using the acoustic vector sensor were presented in this study. Direction of arrival (DOA) for considered source was determined based on sound intensity method supported by Fourier analysis. Obtained spectrum components for considered signal allowed to determine the DOA value for the particular frequency independently. The accuracy of the developed...

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• Localization of impulsive disturbances in archive audio signals using predictive matched filtering

  Publication

  • M. Niedźwiecki
  • M. Ciołek

  - Year 2014

  The problem of elimination of impulsive disturbances from archive audio signals is considered and its new solution, called predictive matched filtering, is proposed. The new approach is based on the observation that a large percentage of noise pulses corrupting archive audio recordings have highly repetitive shapes that match several typical “patterns”, called click templates. To localize noise pulses, click templates can be correlated...

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• Localization Factors for Outsourcing and Offshoring Projects in the V4 Countries. An Attempt of Initial Investigation

  Publication

  • M. Muchlado
  • P. Grudowski

  - Year 2014

  Main objective of this paper is to present the conditions for the investors in the context of outsourcing or offshoring provided by V4 countries in order to present similarities and opposites between analyzed countries and to identify good and bad sides of investing in particular Visegrad group country.

• INTEGRATION OF THE MOBILE PLATFORMS BASED ON SOCIAL NETWORK SERVICE DIRECTED AT USERS LOCALIZATION

  Publication

  • M. Wójcik
  • P. Napieracz

  - Year 2013

  This paper presents an architecture overview and some aspects of implementation of the social network service directed at users localization. It shows how web services can be used as a tool for integrating different mobile platforms with a web application. The main focus is set on communication between system elements and related problems.

• Automatic sound source localization in disturbing conditions using acoustic vector sensors

  Publication

  • A. Czyżewski
  • J. Kotus

  - Elektronika Ir Elektrotechnika - Year 2011

  A concept, practical realization and applications of a passive acoustic radar to automatic localization and tracking of sound sources in disturbing conditions were presented in the paper. The device consists of the new kind of multichannel miniature sound intensity sensors and a group of digital signal processing algorithms. The sensitivity of the realized acoustic radar was examined in free sound field. Several kinds of sound...

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• Multiple sound sources localization in real time using acoustic vector sensor

  Publication

  • J. Kotus

  - Communications in Computer and Information Science - Year 2012

  Method and preliminary results of multiple sound sources localization in real time using the acoustic vector sensor were presented in this study. Direction of arrival (DOA) for considered source was determined based on sound intensity method supported by Fourier analysis. Obtained spectrum components for considered signal allowed to determine the DOA value for the particular frequency independently. The accuracy of the developed...

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• Detection and localization of selected acoustic events in acoustic field for smart surveillance applications

  Publication

  • J. Kotus
  • K. Łopatka
  • A. Czyżewski

  - MULTIMEDIA TOOLS AND APPLICATIONS - Year 2014

  A method for automatic determination of position of chosen sound events such as speech signals and impulse sounds in 3-dimensional space is presented. The evens are localized in the presence of sound reflections employing acoustic vector sensors. Human voice and impulsive sounds are detected using adaptive detectors based on modified peak-valley difference (PVD) parameter and sound pressure level. Localization based on signals...

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• 3D DEM SIMULATIONS OF BASIC GEOTECHNICAL TESTS WITH EARLY DETECTION OF SHEAR LOCALIZATION.

  Publication

  • A. Grabowski
  • M. Nitka

  - Studia Geotechnica et Mechanica - Year 2021

  W artykule przedstawiono rezultaty numeryczne dla podstawowych testów geotechnicznych: testu trójosiowego ściskania oraz w aparacie bezpośredniego ścinania dla piasku bez kohezji. Wszystkie testy zostały wykonane w 3D, a piasek został wymodelowany w postaci kulek wraz z momentami symulującymi nieregularny kształt ziarna. Podczas badań sprawdzono wpływ parametrów fizycznych (m. in. początkowy wskaźnik porowatości, obciążenie pionowe...

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• 60 GHz Microstrip Van Atta Arrays for Millimeter Wave Identification and Localization

  Publication

  • K. Trzebiatowski
  • M. Rzymowski
  • Ł. Kulas
  • K. Nyka

  - Year 2020

  In this paper performance comparison of co-polarized and cross-polarized microstrip Van Atta arrays working in the 60 GHz frequency range is presented. They can be treated as simple chipless RFID tags with frequency response based identification. Tags with three different nominal resonance frequencies of 57, 62 and 67 GHz are designed by scaling optimized base model. Designed 62 GHz co-polarized and cross-polarized arrays with...

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• Comparative modelling of shear localization in granular bodies using a discrete and continuum approach

  Publication

  • J. Kozicki
  • J. Tejchman

  - Year 2008

  W artykule przedstawiono pierwsze wyniki symulacji rys w betonie przy zastosowaniu metody elementów dyskretnych. W obliczeniach wykorzystano program YADE. W symulacjach wykorzystano kulki o różnych średnicach. Przyjęto dodatkowo działanie momentu symulującego szorstkość ziaren.

• FE-studies on shear localization in an anisotropic micro-polar hypoplastic granular material

  Publication

  • J. Tejchman
  • A. Niemunis

  - GRANULAR MATTER - Year 2006

  W artykule przedstawiono wyniki numerycznej wpływu anizotropii w materiałach granulowanych na powstawanie lokalizacji odkształceń. Obliczenia wykonano dla ściskania dwuosiowego stosując metodę elementów skończonych na bazie mikropolarnego prawa hipoplastycznego.