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Informacje o czasopiśmie
Format
Czasopismo
eISSN
1178-5608
Pierwsze wydanie
01 Jan 2008
Częstotliwość wydawania
1 raz w roku
Języki
Angielski

Wyszukiwanie

Tom 2 (2009): Zeszyt 1 (January 2009)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
1178-5608
Pierwsze wydanie
01 Jan 2008
Częstotliwość wydawania
1 raz w roku
Języki
Angielski

Wyszukiwanie

10 Artykułów
Otwarty dostęp

INVITED PAPER: Scalability and Performance Issues in Deeply Embedded Sensor Systems

Data publikacji: 02 Nov 2017
Zakres stron: 1 - 14

Abstrakt

Abstract

The property of scalability for a given system indicates the ability of a system or a subsystem to be modified with changing load on the system. For a sufficiently large complex system, there are several factors that influence the ability of the system to scale. It is necessary to incorporate solutions to these factors (or bottlenecks) in the design for scalability of a given system. In this paper, we discuss such design principles to handle the key factors that influence the scalability of large complex systems. Specifically, we demonstrate design and implementation of simple, innovative, and relatively less expensive methodology to guarantee that a large complex system (such as network of sensors) is scalable under varying load conditions.

Index terms

  • Wireless sensor networks
  • scalability and performance
  • sensor calibration
  • data summarization and aggregation
Otwarty dostęp

A Location-Aware Call Forwarding Manager System For A Smart Telephony Network Of The Smart Space

Data publikacji: 02 Nov 2017
Zakres stron: 15 - 29

Abstrakt

Abstract

A smart space, such as smart sensor rooms, an office, or simply an area, requires a smart telephony network for an effective voice communication between users. Nowadays, modern Private Branch Exchange (PBX) system does not only provide telephone exchange, but also supports many heterogeneous telephony networks and provides many other useful functions as well. Despite its powerfulness, PBX still cannot achieve a basic requirement for a smart space: It cannot adapt its surroundings automatically, i.e. people still need to make the call forwarding setting manually. In this paper, we propose a system with an algorithm named “2D location-aware” for tracking a person in a smart space. According to the ever-changing environment, the system performs an on-the-fly configuration to provide a dynamic telephony network. In other words, we aim to make all the telephones in the network available to every user in the smart space for receiving his phone calls without any manual call forwarding settings.

Index terms

  • Location-aware
  • Sensor Network
  • Smart Space
  • Smart Sensor Rooms
  • Real World Interaction
  • Call Forwarding
  • IP phone
Otwarty dostęp

An Attitude Based Multi-agent Problem Solving in a Hostile World

Data publikacji: 02 Nov 2017
Zakres stron: 30 - 62

Abstrakt

Abstract

In multi-agent setting agent often encounter conflicts in agents’ plans and actions. This paper presents an attitude based cooperative decision making methodology that allows agents to act appropriately to various options in a hostile and dynamic fire world. It shows that attitude based decision making explore the attitudes and behaviors that help agents to solve problems constructively. The application and implementation of this methodology to a virtual fire-fighting domain has revealed a promising prospect in negotiating conflicts and solving them

Słowa kluczowe

  • teamwork
  • multi-agent systems
  • attitudes
Otwarty dostęp

Study Of Superhydrophilic Nanoparticle-Based Ultra-Thin Films Towards The Development Of Optical Fiber Humidity Sensors

Data publikacji: 02 Nov 2017
Zakres stron: 63 - 74

Abstrakt

Abstract

The study of new nanostructured transparent materials in order to control the permeability properties of the objects is a very interesting field of research due to its enormous applications in optical and electronics among others. With the aim of achieving superhydrophilic coatings it is very important to control some coating parameters such as the water affinity of the coating materials and the overall thickness and roughness at the nanometer scale. In this work transparent superhydrophilic ultra-thin coatings have been fabricated with the Layer-by-Layer (LbL) technique using different diameter SiO2 nanoparticles. These coatings were characterized to optimize their behavior and were applied to optical fiber substrates in order to create superhydrophilic optical interferometric cavities. These cavities show an optical response to Relative Humidity (RH) variations that are suitable for high performance sensing applications such as human-breathing monitoring

Index terms

  • Humidity sensor
  • Layer-by-Layer
  • Optical fiber sensor
  • SiO2 nanoparticles
  • Superhydrophilic surfaces
  • Nanostructured materials
Otwarty dostęp

K-Barrier Coverage With A Directional Sensing Model

Data publikacji: 02 Nov 2017
Zakres stron: 75 - 93

Abstrakt

Abstract

The use of wireless sensor networks to protect sensitive facilities or international borders has attracted more and more attention. In contrast to previous studies in which the barrier coverage problem was solved under the assumption of an omni-directional sensing model, the current study presents a scheme for constructing k-barrier coverage using randomly deployed sensors with directional sensing model. The performance of the proposed scheme was evaluated using the ns-2 network simulator and compared with that of an omni-directional sensing scheme. Overall, the results show that for a given sensing range, the proposed directional sensing scheme achieved k-barrier coverage with a fewer number of active sensor nodes than the omni-directional sensing method. Moreover, the directional sensing scheme demonstrates a more robust ability than the omni-directional sensing method in constructing k-barrier coverage as the length of the belt increases or the node density within the sensing field decreases.

Index terms

  • Wireless sensor networks
  • directional sensing model
  • barrier coverage
Otwarty dostęp

LF Indoor Location and Identification System

Data publikacji: 02 Nov 2017
Zakres stron: 94 - 117

Abstrakt

Abstract

In this paper, a low-frequency RFID location system based on a matrix of quad antennae placed under a floor surface is described. A prototype system was used for parameterisation and feasibility tests. The results show that it is possible to build a location system using floor quad antennae.

Index terms

  • RFID
  • Low-Frequency
  • Indoor location
  • near field imaging
Otwarty dostęp

Design Of Wireless Communication Sensing Networks For Tunnels, Trains And Buildings

Data publikacji: 02 Nov 2017
Zakres stron: 118 - 134

Abstrakt

Abstract

This paper deals with the various assumptions used in the design and analysis of distributed antenna system (DAS) for trains, tunnels and in-building wireless radio coverage. The design includes handover overlap design, base station connectivity, signal reticulation using splitters, couplers, bidirectional amplifiers, attenuators, discrete antennas, radiating cables and opto-electric couplers etc. It is found that signal strength, noise, intermodulation calculated for the up and down links are in compliance with the given specifications and satisfy the required system margin. Our system specifications based on TETRA (Terrestrial Trunked Radio) ensures that the received signal is at least 5 dB higher than the TETRA dynamic sensitivity level and yields 95% coverage of all the used areas

Index terms

  • antenna
  • signal distribution
  • wireless network
  • uplink
  • downlink
  • system margin
Otwarty dostęp

OSGi-Based Context-Aware Middleware for Building Intelligent Services in a Smart Home Environment

Data publikacji: 02 Nov 2017
Zakres stron: 135 - 155

Abstrakt

Abstract

Context awareness technology is a key technology of digital home that brings a more convenient life. Context awareness technology is a system that catches the information from the sensor network, which is built in environment, the network could get the environment data immediately, and through this data information that network provides, the system could do the exactly the right thing that help people’s like getting better. These information data could be location, temperature or humidity. However, these data are used by context awareness system to analysis and process, so as to realize different person in different environment using every kind of devices and through any different existing network system, and still could enjoy the personality applications and services in any time they want. This thesis proposed Intelligent Context-Aware Middleware is including system core modeling, context provider, context analysis model, reasoning system, scenario analysis model and some other APIs to achieve the context awareness system that a digital home needs. Besides, this middleware collaborates with OSGi framework in paralleled. In other words, this Intelligent Context-Aware Middleware is totally associated to each other, which means every new devices could be compatible to either OSGi framework or Intelligent Context-Aware Middleware this thesis proposed immediately

Index terms

  • OSGi
  • Context-Aware
  • Intelligent Services
Otwarty dostęp

Positioning Accuracy And Multi-Target Separation With A Human Tracking System Using Near Field Imaging

Data publikacji: 02 Nov 2017
Zakres stron: 156 - 175

Abstrakt

Abstract

We analyze the performance of a novel human tracking system, which uses the electric near field to sense human presence. The positioning accuracy with moving targets is measured using raw observations, observation centroids and Kalman filtered centroids. In addition to this, the multi-target discrimination performance is studied with two people and a Rao-Blackwellized Monte Carlo data association algorithm. A reel-based triangulation system is used as the reference positioning system. The mean positioning error for five test subjects walking at different speeds is 21 centimeters. The discrimination performance is 90% when the distance between the two people is over 0.8 meters. With distance over 1.1 meters the discrimination performance is 99%.

Index terms

  • Floor sensor
  • Near field imaging
  • Human tracking
  • Multiple target tracking
Otwarty dostęp

Normalization techniques for gas sensor array as applied to classification for black tea

Data publikacji: 02 Nov 2017
Zakres stron: 176 - 189

Abstrakt

Abstract

Assessment of black tea quality is a difficult task due to the presence of a large number of chemical compounds. The present day practice in the tea industry for this purpose is to employ the tea-tasters, who evaluate the quality based on their experience and professional acumen. There is a dire need in the industry to assess the tea quality objectively using instrumental methods. In this pursuit, an electronic nose instrument with five gas sensors has been developed and deployed for declaring tea-taster like scores. It has been observed that pre-processing of gas sensor data improves the classification accuracy and in this paper, a comparative study of different normalization techniques is presented for black tea application using electronic nose. For this study black tea samples were collected from different tea gardens in India. At first Principal Component Analysis (PCA) is used to investigate the presence of clusters in the sensors responses in multidimensional space. Then different normalization techniques were applied on electronic nose data. Finally the comparison of classification accuracy is presented with different normalization techniques using back-propagation multilayer perceptron (BP-MLP) neural network.

Index terms

  • black tea
  • electronic nose
  • gas sensor
  • normalization technique
  • principal component analysis
  • back-propagation multilayer perceptron (BP-MLP)
10 Artykułów
Otwarty dostęp

INVITED PAPER: Scalability and Performance Issues in Deeply Embedded Sensor Systems

Data publikacji: 02 Nov 2017
Zakres stron: 1 - 14

Abstrakt

Abstract

The property of scalability for a given system indicates the ability of a system or a subsystem to be modified with changing load on the system. For a sufficiently large complex system, there are several factors that influence the ability of the system to scale. It is necessary to incorporate solutions to these factors (or bottlenecks) in the design for scalability of a given system. In this paper, we discuss such design principles to handle the key factors that influence the scalability of large complex systems. Specifically, we demonstrate design and implementation of simple, innovative, and relatively less expensive methodology to guarantee that a large complex system (such as network of sensors) is scalable under varying load conditions.

Index terms

  • Wireless sensor networks
  • scalability and performance
  • sensor calibration
  • data summarization and aggregation
Otwarty dostęp

A Location-Aware Call Forwarding Manager System For A Smart Telephony Network Of The Smart Space

Data publikacji: 02 Nov 2017
Zakres stron: 15 - 29

Abstrakt

Abstract

A smart space, such as smart sensor rooms, an office, or simply an area, requires a smart telephony network for an effective voice communication between users. Nowadays, modern Private Branch Exchange (PBX) system does not only provide telephone exchange, but also supports many heterogeneous telephony networks and provides many other useful functions as well. Despite its powerfulness, PBX still cannot achieve a basic requirement for a smart space: It cannot adapt its surroundings automatically, i.e. people still need to make the call forwarding setting manually. In this paper, we propose a system with an algorithm named “2D location-aware” for tracking a person in a smart space. According to the ever-changing environment, the system performs an on-the-fly configuration to provide a dynamic telephony network. In other words, we aim to make all the telephones in the network available to every user in the smart space for receiving his phone calls without any manual call forwarding settings.

Index terms

  • Location-aware
  • Sensor Network
  • Smart Space
  • Smart Sensor Rooms
  • Real World Interaction
  • Call Forwarding
  • IP phone
Otwarty dostęp

An Attitude Based Multi-agent Problem Solving in a Hostile World

Data publikacji: 02 Nov 2017
Zakres stron: 30 - 62

Abstrakt

Abstract

In multi-agent setting agent often encounter conflicts in agents’ plans and actions. This paper presents an attitude based cooperative decision making methodology that allows agents to act appropriately to various options in a hostile and dynamic fire world. It shows that attitude based decision making explore the attitudes and behaviors that help agents to solve problems constructively. The application and implementation of this methodology to a virtual fire-fighting domain has revealed a promising prospect in negotiating conflicts and solving them

Słowa kluczowe

  • teamwork
  • multi-agent systems
  • attitudes
Otwarty dostęp

Study Of Superhydrophilic Nanoparticle-Based Ultra-Thin Films Towards The Development Of Optical Fiber Humidity Sensors

Data publikacji: 02 Nov 2017
Zakres stron: 63 - 74

Abstrakt

Abstract

The study of new nanostructured transparent materials in order to control the permeability properties of the objects is a very interesting field of research due to its enormous applications in optical and electronics among others. With the aim of achieving superhydrophilic coatings it is very important to control some coating parameters such as the water affinity of the coating materials and the overall thickness and roughness at the nanometer scale. In this work transparent superhydrophilic ultra-thin coatings have been fabricated with the Layer-by-Layer (LbL) technique using different diameter SiO2 nanoparticles. These coatings were characterized to optimize their behavior and were applied to optical fiber substrates in order to create superhydrophilic optical interferometric cavities. These cavities show an optical response to Relative Humidity (RH) variations that are suitable for high performance sensing applications such as human-breathing monitoring

Index terms

  • Humidity sensor
  • Layer-by-Layer
  • Optical fiber sensor
  • SiO2 nanoparticles
  • Superhydrophilic surfaces
  • Nanostructured materials
Otwarty dostęp

K-Barrier Coverage With A Directional Sensing Model

Data publikacji: 02 Nov 2017
Zakres stron: 75 - 93

Abstrakt

Abstract

The use of wireless sensor networks to protect sensitive facilities or international borders has attracted more and more attention. In contrast to previous studies in which the barrier coverage problem was solved under the assumption of an omni-directional sensing model, the current study presents a scheme for constructing k-barrier coverage using randomly deployed sensors with directional sensing model. The performance of the proposed scheme was evaluated using the ns-2 network simulator and compared with that of an omni-directional sensing scheme. Overall, the results show that for a given sensing range, the proposed directional sensing scheme achieved k-barrier coverage with a fewer number of active sensor nodes than the omni-directional sensing method. Moreover, the directional sensing scheme demonstrates a more robust ability than the omni-directional sensing method in constructing k-barrier coverage as the length of the belt increases or the node density within the sensing field decreases.

Index terms

  • Wireless sensor networks
  • directional sensing model
  • barrier coverage
Otwarty dostęp

LF Indoor Location and Identification System

Data publikacji: 02 Nov 2017
Zakres stron: 94 - 117

Abstrakt

Abstract

In this paper, a low-frequency RFID location system based on a matrix of quad antennae placed under a floor surface is described. A prototype system was used for parameterisation and feasibility tests. The results show that it is possible to build a location system using floor quad antennae.

Index terms

  • RFID
  • Low-Frequency
  • Indoor location
  • near field imaging
Otwarty dostęp

Design Of Wireless Communication Sensing Networks For Tunnels, Trains And Buildings

Data publikacji: 02 Nov 2017
Zakres stron: 118 - 134

Abstrakt

Abstract

This paper deals with the various assumptions used in the design and analysis of distributed antenna system (DAS) for trains, tunnels and in-building wireless radio coverage. The design includes handover overlap design, base station connectivity, signal reticulation using splitters, couplers, bidirectional amplifiers, attenuators, discrete antennas, radiating cables and opto-electric couplers etc. It is found that signal strength, noise, intermodulation calculated for the up and down links are in compliance with the given specifications and satisfy the required system margin. Our system specifications based on TETRA (Terrestrial Trunked Radio) ensures that the received signal is at least 5 dB higher than the TETRA dynamic sensitivity level and yields 95% coverage of all the used areas

Index terms

  • antenna
  • signal distribution
  • wireless network
  • uplink
  • downlink
  • system margin
Otwarty dostęp

OSGi-Based Context-Aware Middleware for Building Intelligent Services in a Smart Home Environment

Data publikacji: 02 Nov 2017
Zakres stron: 135 - 155

Abstrakt

Abstract

Context awareness technology is a key technology of digital home that brings a more convenient life. Context awareness technology is a system that catches the information from the sensor network, which is built in environment, the network could get the environment data immediately, and through this data information that network provides, the system could do the exactly the right thing that help people’s like getting better. These information data could be location, temperature or humidity. However, these data are used by context awareness system to analysis and process, so as to realize different person in different environment using every kind of devices and through any different existing network system, and still could enjoy the personality applications and services in any time they want. This thesis proposed Intelligent Context-Aware Middleware is including system core modeling, context provider, context analysis model, reasoning system, scenario analysis model and some other APIs to achieve the context awareness system that a digital home needs. Besides, this middleware collaborates with OSGi framework in paralleled. In other words, this Intelligent Context-Aware Middleware is totally associated to each other, which means every new devices could be compatible to either OSGi framework or Intelligent Context-Aware Middleware this thesis proposed immediately

Index terms

  • OSGi
  • Context-Aware
  • Intelligent Services
Otwarty dostęp

Positioning Accuracy And Multi-Target Separation With A Human Tracking System Using Near Field Imaging

Data publikacji: 02 Nov 2017
Zakres stron: 156 - 175

Abstrakt

Abstract

We analyze the performance of a novel human tracking system, which uses the electric near field to sense human presence. The positioning accuracy with moving targets is measured using raw observations, observation centroids and Kalman filtered centroids. In addition to this, the multi-target discrimination performance is studied with two people and a Rao-Blackwellized Monte Carlo data association algorithm. A reel-based triangulation system is used as the reference positioning system. The mean positioning error for five test subjects walking at different speeds is 21 centimeters. The discrimination performance is 90% when the distance between the two people is over 0.8 meters. With distance over 1.1 meters the discrimination performance is 99%.

Index terms

  • Floor sensor
  • Near field imaging
  • Human tracking
  • Multiple target tracking
Otwarty dostęp

Normalization techniques for gas sensor array as applied to classification for black tea

Data publikacji: 02 Nov 2017
Zakres stron: 176 - 189

Abstrakt

Abstract

Assessment of black tea quality is a difficult task due to the presence of a large number of chemical compounds. The present day practice in the tea industry for this purpose is to employ the tea-tasters, who evaluate the quality based on their experience and professional acumen. There is a dire need in the industry to assess the tea quality objectively using instrumental methods. In this pursuit, an electronic nose instrument with five gas sensors has been developed and deployed for declaring tea-taster like scores. It has been observed that pre-processing of gas sensor data improves the classification accuracy and in this paper, a comparative study of different normalization techniques is presented for black tea application using electronic nose. For this study black tea samples were collected from different tea gardens in India. At first Principal Component Analysis (PCA) is used to investigate the presence of clusters in the sensors responses in multidimensional space. Then different normalization techniques were applied on electronic nose data. Finally the comparison of classification accuracy is presented with different normalization techniques using back-propagation multilayer perceptron (BP-MLP) neural network.

Index terms

  • black tea
  • electronic nose
  • gas sensor
  • normalization technique
  • principal component analysis
  • back-propagation multilayer perceptron (BP-MLP)

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