Wyniki wyszukiwania dla: indoor%20air

• INDOOR AND BUILT ENVIRONMENT

  Czasopisma

  ISSN: 1420-326X , eISSN: 1423-0070

• Organic compounds in indoor environments

  Publikacja

  • B. Zabiegała

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Rok 2006

  Praca jest przeglądem literaturowym dotyczącym obecności lotnych związków organicznych w powietrzu wewnętrznym. Zaprezentowano główne źródła zanieczyszczeń powietrza wewnętrznego, poruszono tematykę sumarycznej zawartości LZO oraz wpływu zanieczyszczeń powietrza atmosferycznego na jakość powietrza wewnętrznego.

• Recent advances on SOA formation in indoor air, fate and strategies for SOA characterization in indoor air - A review

  Publikacja

  • K. Pytel
  • R. Marcinkowska
  • M. Rutkowska
  • B. Zabiegała

  - SCIENCE OF THE TOTAL ENVIRONMENT - Rok 2022

  Recent studies proves that indoor air chemistry differs in many aspects from atmospheric one. People send up to 90 % of their life indoors being exposed to pollutants present in gas, particle and solid phase. Particle phase indoor is composed of particles emitted from various sources, among which there is an indoor source – secondary chemical reactions leading to formation of secondary organic aerosol (SOA). Lately, researchers'...

  Pełny tekst do pobrania w portalu

• Depolarisation Model for a BAN Indoor Scenario

  Publikacja

  • M. M. Ferreira
  • F. D. Cardoso
  • S. J. Ambroziak
  • M. Särestöniemi
  • K. Turbic
  • L. M. Correia

  - Rok 2023

  In this paper, an analysis of depolarisation in Body Area Networks for Body-to-Infrastructure communications based on a measurement campaign in the 5.8 GHz band in an indoor environment is performed. Measurements were made with an offbody antenna transmitting linearly polarised signals and dualpolarised receiving antennas carried by the user on the body. A Normal Distribution with a mean of 2.0 dB and a standard deviation of 4.3...

  Pełny tekst do pobrania w portalu

• Indoor Air Quality: A Bibliometric Study

  Publikacja

  • M. Pierpaoli
  • M. Ruello

  - Sustainability - Rok 2018

  Pełny tekst do pobrania w serwisie zewnętrznym

• Reliable testbed for indoor positioning systems

  Publikacja

  • P. Woźnica
  • Ł. Kulas
  • K. Nyka

  - Rok 2012

  This paper proposes a test environment for indoor localization system, based on radio wave propagation prosperities. The following sections presents variety of problems from the assessment of the existing localization system to the analysis of inconveniences which occur when comparison of different localization systems is implemented. The problem is associated with different testing environments presented in published papers is...

• A Review of Antennas for Indoor Positioning Systems

  Publikacja

  • L. Bras
  • N. Borges Carvalho
  • P. Pinho
  • Ł. Kulas
  • K. Nyka

  - International Journal of Antennas and Propagation - Rok 2012

  This paper provides a review of antennas applied for indoor positioning or localization systems. The desired requirements of thoseantennas when integrated in anchor nodes (reference nodes) are discussed, according to different localization techniques and theirperformance. The described antennas will be subdivided into the following sections according to the nature of measurements:received signal strength (RSS), time of flight (ToF),...

  Pełny tekst do pobrania w portalu

• Influence of terpenes on indoor air quality

  Publikacja

  • K. Pytel
  • R. Marcinkowska
  • B. Zabiegała

  - Rok 2018

  The aim of this study was to investigate air quality in hairdresser salons, focusing on terpenes determination. Terpenes are known reactive volatile organic compounds that contribute to secondary organic aerosol formation. Those compounds are frequently found in cosmetic products as fragrance agents. Hairdresser salons are special kind of environment, where secondary organic aerosol concentration may be elevated. One hairdresser...

  Pełny tekst do pobrania w portalu

• Analysis of Position Calculating Methods in Indoor Environment

  Publikacja

  • A. Czapiewska

  - Rok 2013

  In the paper a modified gradient method has been proposed for position calculation on basis of distance measurement in indoor environment. It is shown that the well-known Chan method of position calculation is inefficient in indoor circumstances. Author presents Chan and modified gradient methods and achieved results for each one for real measurements.

• Electronic Noses for Indoor Air Quality Assessment

  Publikacja

  • T. Majchrzak
  • W. Wojnowski
  • T. Dymerski
  • J. Gębicki
  • J. Namieśnik

  - Rok 2018

  This chapter presents a proposal of the use of electronic noses in the monitoring of indoor air quality. The main focus is put on the detailed characteristics of today’s indoor air quality control methods, the types of pollution in the air, and the development of electronic noses for air testing. Currently, scientists seek methodological and structural solutions that would enable real-time online indoor air control. It has been...

  Pełny tekst do pobrania w portalu

• New Indoor Positioning Algorithm for Distance Measurements

  Publikacja

  • A. Czapiewska

  - Rok 2017

  In the paper a new indoor positioning algorithm is presented. This algorithm takes into account selected features of radio wave propagation in indoor environment. This results in improvement in accuracy of calculated position estimates. A comparative analysis of this new algorithm with Chan and Foy algorithms was made and described in the paper. This comparative analysis was made with utilization of real radio distance measurements.

• Passive samplers in indoor air quality control

  Publikacja

  • B. Zabiegała
  • M. Partyka
  • J. Namieśnik

  - Rok 2005

  Przedstawiono wyniki badań jakości powietrza wewnętrznego w 12 wybranych mieszkaniach usytuowanych na terenie aglomeracji Trójmiejskiej z wykorzystaniem techniki pasywnej (dozymetria pasywna typu permeacyjnego) oraz techniki dynamicznej (rurki sorpcyjne wypełnione sorbentem Tenax TA). Wykorzystując nowe podejście do sposobu kalibracji dokonano monitoringu zarówno poszczególnych lotnych związków organicznych jak i sumarycznej zawartości...

• Energy efficient indoor localisation for narrowband internet of things

  Publikacja

  • A. M. Soomar

  - Rok 2023

  There are an increasing number of Narrow Band IoT devices being manufactured as the technology behind them develops quickly. The high co-channel interference and signal attenuation was seen in edge Narrow Band IoT devices make it challenging to guarantee the service quality of these devices. To maximize the data rate fairness of Narrow Band IoT devices, a multi-dimensional indoor localization model is devised, consisting of...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Screening of volatile organic compounds as a source for indoor pollution

  Publikacja

  • B. Zabiegała
  • M. Partyka
  • A. Gawrońska
  • A. Wasilewska
  • J. Namieśnik

  - International Journal of Environment and Health - Rok 2007

  Lotne związki organiczne (VOC) stanowią jedne z istotniejszychzanieczyszczeń powietrza wewnętrznego, ich stężenia w powietrzu wewnętrznym są często kilkakrotnie wyższe niż odpowiadające im stężenia w powietrzu zewnętrznym. Ten niekorzystny stosunek stężeń wskazuje na obecność endogennych źródeł emisji (usytuowanych bezpośrednio wewnątrz budynków). Lotne związki organiczne uwalniane są do powietrza wewnętrznego z wielu kontrolowanych...

• Characteristics of the Polarised Off-Body Channel in Indoor Environments

  Publikacja

  • K. Turbić
  • S. J. Ambroziak
  • L. M. Correia

  - Rok 2016

  This paper addresses the depolarisation effect in off-body Body Area Networks channels, based on measurements performed at 2.45 GHz in an indoor environment. Seven different scenarios, involving both static and dynamic users, were considered, taking a statistical perspective. The analysis of the cross-polarisation discrimination is performed, as well as the analysis of path loss in co- and cross-polarised channels. Results show...

• Comparison of new position estimation algorithm for indoor environment

  Publikacja

  • A. Czapiewska
  • J. Sadowski

  - Rok 2014

  In the paper a new position estimation algorithm based on distance measurements is presented. This algorithm is dedicated for indoor environments. In the paper the new algorithm is compared with Chan algorithm. For the comparison were used real measurements conducted inside a building.

• Single-Anchor Indoor Localization Using ESPAR Antenna

  Publikacja

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

  - IEEE Antennas and Wireless Propagation Letters - Rok 2016

  In this paper a new single-anchor indoor localization concept employing Electronically Steerable Parasitic Array Radiator (ESPAR) antenna has been proposed. The new concept uses a simple fingerprinting algorithm adopted to work with directional main beam and narrow minimum radiation patterns of ESPAR antenna that scans 360° area around the base station, while the signal strength received from a mobile terminal is being recorded...

  Pełny tekst do pobrania w portalu

• Hybrid System for a Person Tracking in Harsh Indoor Environments

  Publikacja

  • P. Rajchowski
  • K. Cwalina
  • J. Sadowski
  • J. Stefański

  - Rok 2019

  In the article, the prototype of a system for a person tracking in a harsh indoor environment, especially when no other commercially available radiolocalization system can be used, was briefly described. The prototype realizes the data fusion, i.e. combines data from inertial and environmental sensors and radio distance measurements to estimate the position of a moving person. It is worth noting that the concept and practical realization...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Indoor air quality in public utility environments-a review

  Publikacja

  • M. Śmiełowska
  • M. Marć
  • B. Zabiegała

  - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH - Rok 2017

  Indoor air quality has been the object of interest for scientists and specialists from the fields of science such as chemistry, medicine and ventilation system design. This results from a considerable number of potential factors, which may influence the quality of the broadly understood indoor air in a negative way. Poor quality of indoor air in various types of public utility buildings may significantly affect an increase in the...

  Pełny tekst do pobrania w portalu

• Characteristics of the polarised off-body channel in indoor environments

  Publikacja

  • K. Turbić
  • S. J. Ambroziak
  • L. M. Correia

  - EURASIP Journal on Wireless Communications and Networking - Rok 2017

  This paper addresses the depolarisation effect in off-body body area networks channels, based on measurements performed at 2.45 GHz in an indoor environment. Seven different scenarios, involving both static and dynamic users, were considered, taking a statistical perspective. The analysis of the cross-polarisation discrimination is performed, as well as the analysis of path loss in co- and cross-polarised channels. Results show...

  Pełny tekst do pobrania w portalu

• Polybrominated diphenyl ether (PBDE) concentrations in dust from various indoor environments in Gdańsk, Poland: Prediction of concentrations in indoor air and assessment of exposure of adults

  Publikacja

  • M. Śmiełowska
  • B. Zabiegała

  - SCIENCE OF THE TOTAL ENVIRONMENT - Rok 2020

  Monitoring of polybrominated diphenyl ethers (PBDEs) in indoor environments involves the determination of their concentrations in air, airborne particles, and settled dust. Each of these is a source of human exposure to PBDEs. In this study, we attempted to model PBDEs concentrations in various typical indoor environments on the basis of real PBDEs measurements in dust collected from them. The analytical procedure for determining...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Permeation passive sampling as a tool for the evaluation of indoor air quality

  Publikacja

  • B. Zabiegała
  • T. Gorecki
  • E. Przyk
  • J. Namieśnik

  - ATMOSPHERIC ENVIRONMENT - Rok 2002

  Określono stężenie średnie ważone w czasie wybranych lotnych związków organicznych w powietrzu ośmiu pomieszczeniach mieszkalnych na terenie miasta Gdańska. Do pobierania próbek analitów z powietrza wewnętrznego zastosowano permeacyjny dozymetr pasywny typu pudełkowego oraz technikę dynamiczną (urządzenie przepływowe z rurką sorpcyjną). Porównano wyniki uzyskane w wyniku zastosowania w/w technik pobierania próbek analitów.

• LSTM-based method for LOS/NLOS identification in an indoor environment

  Publikacja

  • A. Olejniczak
  • O. Błaszkiewicz
  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - Rok 2020

  Due to the multipath propagation, harsh indoor environment significantly impacts transmitted signals which may adversely affect the quality of the radiocommunication services, with focus on the real-time ones. This negative effect may be significantly reduced (e.g. resources management and allocation) or compensated (e.g. correction of position estimation in radiolocalisation) by the LOS/NLOS identification algorithm. This paper...

• Monitoring and analytics of semivolatile organic compounds (SVOCs) in indoor air

  Publikacja

  • S. Król
  • B. Zabiegała
  • J. Namieśnik

  - ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2011

  This paper reviews literature information on the behaviour of semivolatile organic compounds (SVOCs) in the indoor environment, as well as the most likely emission sources. The consecutive stages of analytical procedures used for monitoring SVOCs in indoor environments are described. The most common approaches used for collecting samples from the gas and particulate phases are mentioned. The paper discusses and compares various...

  Pełny tekst do pobrania w serwisie zewnętrznym

• TiO2-based photocatalysts in indoor swimming pool air purification

  Publikacja

  • A. Hänel
  • A. Grabowiec
  • J. Hupka

  - Rok 2011

  Wzrastająca 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...

• A picocellular UMTS/TDD overlay on GSM system for indoor environment

  Publikacja

  • D. Rutkowski
  • P. Kaczorek

  - Rok 2006

  W pracy przedstawiono nakładkę CDMA na system GSM. Nakładka użytkuje system UMTS w trybie TDD i jest przeznaczona do funkcjonowania wewnątrz budynków w obszarze makrokomórki systemu GSM. Wyniki badań przedstawione w pracy ukazują znaczny wzrost efektywności wykorzystania tego samego pasma przez oba systemy i uzyskanie znacznej pojemności dla nakładki bez degradacji pracy systemu GSM

• An Empirical Model for the Polarisation Characteristics of Indoor Off-Body Channels

  Publikacja

  • K. Turbić
  • S. J. Ambroziak
  • L. M. Correia

  - Rok 2017

  This paper presents an analysis of the polarisation characteristics for the channel in dynamic off-body communications, and an empirical channel model, based on measurements performed at 2.45 GHz in an office environment. Body presence and propagation conditions have a strong influence on signal depolarisation. The model assumes three components for the total path loss: mean path loss, represented by a log-distance function with...

• Influence of external walls' thermal capacitance on indoor thermal comfort

  Publikacja

  • K. Arendt

  - Rok 2013

  The doctoral thesis presents the results of numerical investigations on the influence of walls’ thermal capacitance on indoor thermal comfort. A proper set of thermal parameters of a building structure can considerably limit the heating / cooling demand, and passively increase the indoor thermal comfort. However the effect of building thermal capacitance on indoor conditions is complex and not always beneficial. Among a great number...

• Measurements of Path Loss in Off-Body Channels in Indoor Environments

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak

  - Rok 2015

  The main goal of the paper is to investigate the influence of body orientation and on-body antenna placement on the path loss in off-body communications. In addition, the influence of different bodies is analysed.

• The Use of Sensory Analysis Techniques to Assess the Quality of Indoor Air

  Publikacja

  • P. Kolasińska
  • T. Dymerski
  • J. Gębicki
  • J. Namieśnik

  - CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY - Rok 2017

  The quality of indoor air is one of the significant elements that influences people's well-being and health inside buildings. Emissions of pollutants, which may cause odor nuisance, are the main reason for people's complaints regarding the quality of indoor air. As a result, it is necessary to perform tests aimed at identifying the sources of odors inside buildings. The article contains basic information on the characteristics...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Measurements of Path Loss in Off-Body Channels in Indoor Environments

  Publikacja

  • S. J. Ambroziak
  • M. Maćkowiak
  • R. Katulski
  • J. Sadowski
  • L. M. Correia

  - Rok 2014

  This paper presents a measurements of the path loss for validation of a statistical model for off-body radio channels in an indoor multipath environment, which considers the distance dependent mean path loss, and describes body shadowing and fast fading components in a statistical way. The measurement equipment and propagation indoor environment have been presented. Two different bodies and five static and two walking scenarios...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Analysis of Accuracy of Modified Gradient Method in Indoor Radiolocalisation System

  Publikacja

  • J. Sadowski
  • A. Czapiewska

  - Rok 2014

  In this paper a new method, called modified gradient method, has been proposed for position calculation on the basis of distance measurement in indoor environment. It is shown that well known method of position calculation such as Foy is inefficient in indoor environment. In this article is also described the indoor radiolocalisation system which was used for collecting distance measurements which were employed for further comparative...

• Path Loss Analysis in Off-Body Channels in Indoor Environment

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak

  - Rok 2015

  This temporary document describes an analysis of path loss in off-body channels in an indoor environment. The influence of body orientation and on-body antenna placement on path loss in off-body communications as well as of different bodies has been investigated. Five static scenarios, six distances between body and antenna and eight body orientations were analysed; moreover, two dynamic scenarios were investigated. The smallest...

• Wideband Channel Measurements for Polarised Indoor Off-Body Communications

  Publikacja

  • K. Turbić
  • S. J. Ambroziak
  • L. M. Correia
  • M. Beko

  - Rok 2018

  This paper presents the initial results of wideband channel measurements for polarised off-body communication at 5.8 GHz, in an indoor environment. Channel Impulse Response measurements were performed simultaneously for two orthogonal polarisations of the wearable antenna, and repeated for vertical and horizontal orientations of the off-body one. Four types of measurement scenarios were considered in order to investigate the influence...

• Path Loss Analysis for the IoT Applications in the Urban and Indoor Environments

  Publikacja

  • P. Rajchowski
  • J. Sadowski
  • O. Błaszkiewicz
  • K. Cwalina
  • A. Olejniczak

  - Rok 2020

  The Internet of Things (IoT) networks concept implies their presence in a various and untypical locations, usually with a disturbed radio signals propagation. In the presented paper an investigation of an additional path loss observed in an underground environment was described. The proposed measurement locations correspond to the operation areas of rapidly growing narrowband IoT (NBIoT) networks, the ones using the Long Term Evolution...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Jakość powietrza wewnętrznego - lotne związki organiczne jako wskaźnik jakości powietrza wewnętrznego = Indoor air quality - volatile organic compounds as an indicator of the quality of indoor air

  Publikacja

  • B. Zabiegała

  - Rok 2009

  Pomieszczenia zamknięte z jednej strony są barierą chroniącą przed negatywnymi czynnikami środowiska, zmiennymi warunkami pogodowymi - deszczem, wiatrem, niską lub wysoką temperaturą, z drugiej jednak strony - w zamkniętych wnętrzach nastepuje często kumulacja toksycznych związków organicznych i nieorganicznych, co nie pozostaje bez wpływu na ludzkie zdrowie.Głównym celem badań jest oszacowanie jakości powietrza wewnętrznego pod...

• Properties of an innovative multi-functional finish for the improvement of indoor air quality

  Publikacja

  • C. Giosuè
  • M. Pierpaoli
  • C. di Perna
  • B. Citterio
  • G. Mangiaterra
  • M. L. Ruello
  • F. Tittarelli

  - BUILDING AND ENVIRONMENT - Rok 2023

  Due to lifestyle changes, people spend most of their time indoors at present; thus, Indoor Air Quality (IAQ) is a matter of utmost importance. Multi-functional and innovative finishes can help to passively improve the IAQ, benefitting the health and comfort of occupants. For this study, reference and pre-mixed commercial mortars are compared to a new multi-functional hydraulic lime mortar for indoor finishes, in which conventional...

  Pełny tekst do pobrania w serwisie zewnętrznym

• ‘Personas for lighting’. Three methods to develop personas for the indoor lighting environment

  Publikacja

  • N. Sokół
  • J. Martyniuk-Pęczek
  • B. Matusiak
  • C. N. D. Amorim
  • M. Waczynska
  • J. Kurek
  • N. G. Vasquez
  • S. Sibilio
  • J. Kanno
  • M. Scorpio... i 2 innych

  - ENERGY AND BUILDINGS - Rok 2023

  The objective of this research is to describe and compare three different methods of generating ‘persona for lighting’ to envision users’ behaviour within the lighting environment. ‘Personas’ are used to represent typical users, highlighting their needs, perspectives, and expectations to aid user-centric design approaches. The researchers looked for the most useful method of shaping ‘personas for lighting’ to learn about users’...

  Pełny tekst do pobrania w portalu

• Research of Accuracy of RSSI Fingerprint-Based Indoor Positioning BLE System

  Publikacja

  • M. Wysocki
  • R. Nicpoń
  • M. Trzaska
  • A. Czapiewska

  - Rok 2022

  Radio localization in indoor environment is still a challenging task due to environment volatility. In the paper are compared achieved localization accuracies for RSSI-Fingerprinting method utilizing Bluetooth Low Energy (BLE) for two different environments: large empty hall and narrow corridor. Measurements were done by 6 different smartphones of 3 different producers, which makes those measurements unique as accuracies achieved...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Research of Accuracy of RSSI Fingerprint-Based Indoor Positioning BLE System

  Publikacja

  • M. Wysocki
  • R. Nicpoń
  • M. Trzaska
  • A. Czapiewska

  - Przegląd Elektrotechniczny - Rok 2022

  Radio localization in indoor environment is still a challenging task due to environment volatility. In the paper are compared achieved localization accuracies for RSSI-Fingerprinting method utilizing Bluetooth Low Energy (BLE) for two different environments: large empty hall and narrow corridor. Measurements were done by 6 different smartphones of 3 different producers, which makes those measurements unique as accuracies achieved...

  Pełny tekst do pobrania w portalu

• System Loss Model for Body-to-Body Networks in Indoor and Outdoor Environments

  Publikacja

  • S. J. Ambroziak
  • K. Cwalina
  • M. M. Ferreira
  • F. D. Cardoso
  • L. M. Correia

  - Rok 2023

  A system loss model for body-to-body networks in indoor and outdoor environments is proposed in this paper, based on measurements taken at 2.45 GHz. The influence of the type of environment, antenna visibility and user mobility on model parameters has been investigated. A significant impact of mutual antennas’ placement and their visibility is shown. The proposed model fits well to empirical data, with the average root mean square...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Indoor atmospheric degradation of historical metal objects studied by spectroscopic techniques

  Publikacja

  • I. Żmuda-Trzebiatowska
  • A. Fietkiewicz
  • G. Śliwiński

  - Solid State Phenomena - Rok 2012

• Determination of bisphenol A in size fractions of indoor dust from several microenvironments

  Publikacja

  • M. Caban
  • P. Stepnowski

  - Microchemical Journal - Rok 2020

  Pełny tekst do pobrania w serwisie zewnętrznym

• Indoor allergens in settled dust from kindergartens in city of Łódź, Poland

  Publikacja

  • M. Cyprowski
  • A. Buczyńska
  • I. Szadkowska-Stańczyk

  - International Journal of Occupational Medicine and Environmental Health - Rok 2013

  Pełny tekst do pobrania w serwisie zewnętrznym

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

  Publikacja

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

  - Rok 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...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Visual Detection of People Movement Rules Violation in Crowded Indoor Scenes

  Publikacja

  • P. Dalka
  • P. Bratoszewski

  - Rok 2013

  The paper presents a camera-independent framework for detecting violations of two typical people movement rules that are in force in many public transit terminals: moving in the wrong direction or across designated lanes. Low-level image processing is based on object detection with Gaussian Mixture Models and employs Kalman filters with conflict resolving extensions for the object tracking. In order to allow an effective event...

  Pełny tekst do pobrania w serwisie zewnętrznym

• RF Indoor Positioning System Supported by Wireless Computer Vision Sensors

  Publikacja

  • P. Woźnica
  • M. Tarkowski
  • M. Płotka
  • Ł. Kulas

  - Rok 2014

  In this paper the possibility of increase the accuracy of RF fingerprinting indoor tracking system by the use of additional information from simple vision system is examined. As the distances in signal space differs from ones in real environment the ambiguity in decision process of fingerprinting algorithm can occur when set of closest distances between tag and map points in signal space corresponds to big distances differences...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Impact of radio wave polarisation on off-body communications in indoor environments

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak

  - Rok 2015

  This paper describes the measurements and the analysis of the impact of radio wave polarisation on off-body communications in Body Area Networks in indoor environments. Measurements on polarisation impact are briefly described. Five investigated scenarios with different body postures and different antenna placements are characterised. The difference between the vertical and horizontal components of the received radio signal are...

• An Off-Body Channel Model for Body Area Networks in Indoor Environments

  Publikacja

  • S. J. Ambroziak
  • L. M. Correia
  • R. Katulski
  • M. Maćkowiak
  • C. Oliveira
  • J. Sadowski
  • K. Turbić

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Rok 2016

  This paper presents an off-body channel model for body area networks (BANs) in indoor environments. The proposed model, which is based on both simulations and measurements in a realistic environment, consists of three components: mean path loss, body shadowing, and multipath fading. Seven scenarios in a realistic indoor office environment containing typical scatterers have been measured: five were static (three standing and two...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Fading Characteristics for Dynamic Body-to-Body Channels in Indoor and Outdoor Environments

  Publikacja

  • K. Turbić
  • S. J. Ambroziak
  • L. M. Correia

  - Rok 2018

  This paper presents an analysis of the fading characteristics in dynamic body-to-body channels, based on measurements performed at 2.45 GHz in indoor and outdoor environments. The statistical analysis of the small- and large-scale fading shows that the Nakagami Distribution is the best model for the former and the Log-Normal one for the latter. An important influence of body shadowing...