Smart space is usually an environment of any building, University campus, outdoor areas that are ... more Smart space is usually an environment of any building, University campus, outdoor areas that are enabled for interfacing the objects or systems and ubiquitous interaction with the users or visitors. A smart space enhances users experience in the space and provides an environment to perform his everyday activities more easily. However, creating such smart spaces or environments is really a challenge, as the human needs are changing all the time. To cope-up with the available technology and user"s requirements is a difficult task. This paper proposes the design framework of Smart Space based on various aspects such as physical space, its architecture, context, cognitive psychology, technology etc. The methodology of designing a smart space is also explained with the help of flowchart and it is illustrated by a set of system prototypes especially designed for the corridor of a building.
International Journal of Sustainable Lighting, 2018
Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent... more Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent. So, it is very difficult to measure glare factor accurately. Glare can be disabling or uncomfortable. Disability glare is the reduction in vision caused by bright light sources and it can be increased with the age of a person. Discomfort glare is a sensation of irritation due to bright light sources. There are various methods to evaluate discomfort glare. These methods are discussed in this paper. This paper mainly focuses on two methods of discomfort glare evaluation; Unified Glare Rating (UGR) and Daylight Glare Probability (DGP). These glare factors are calculated by using DIALux lighting simulation software and by using developed program. The experimentation was carried out in two different spaces; Conference room and Optoelectronics laboratory. The values of UGR, daylight factor are calculated by using DIALux and developed program. The comparison of the results obtained is discus...
Journal of Materials Science: Materials in Electronics, 2008
Ceramic technology has had an important role in microelectronics since 1960s and ceramic seems to... more Ceramic technology has had an important role in microelectronics since 1960s and ceramic seems to be a continuously developing, mature technology. Recently, development of low temperature co-fired ceramic technology (LTCC) has been geared up due to the huge demand of miniaturisation of electronic components. New materials are being developed for extending the demand of wide range of dielectric properties of LTCC, minimization of shrinkage, cambering of LTCC, high quality of conductors and patterning etc. This paper deals with formulation of silver conductor inks for LTCC and the effect of ink organics on the LTCC in particular to cambering/warpage, microstructure development were studied and presented.
Uniformity of illumination is of prime importance in the designing of lighting system. Often it i... more Uniformity of illumination is of prime importance in the designing of lighting system. Often it is achieved by measuring illuminance values on the target plane at predefined locations using luxmeter. To speed up the experimentation and to automate the measuring procedure, a portable test-jig is developed at work place. It acquires illuminance data from sixteen predefined locations on target surface simultaneously. The data is used for computing uniformity of illumination. The test-jig consists of photo sensors, Data Acquisition System (DAS) and control system. The photo sensors are fixed on a flex sheet which can be rolled. The sheet is spread over the surface whose uniformity is to be measured. The portable, automated test-jig gives the uniformity of illumination quickly. The test-jig is used to evaluate the performance of three luminaries viz. incandescent bulb, CFL and LED. Results confirm that LED bulbs are energy efficient than others giving more illuminance without hampering illumination uniformity. LED luminaire of 6 W illuminates 1m X 1m target surface having uniformity in the range of 0.4 – 0.73 for target-source distance of 50cm – 170cm. Dependence of uniformity on source wattage and view angle is also reported.
ABSRACT:Energy efficient corridor illumination in commercial and residential buildings is becomin... more ABSRACT:Energy efficient corridor illumination in commercial and residential buildings is becoming increasingly important in the energy conservation era. Lighting control systems with adequate algorithms are basically used for energy saving. The integration of daylight with electric light in building corridors during daytime hours is a key element in designing the lighting control system. The most common form of electric lighting control is the on/off "toggle" switch. Other forms of lighting control include occupancy sensors, daylight sensors, clock switches, a variety of manual and automatic dimming devices, and centralized controls. The selection of sensor and type of lighting control depends on the application and the area where it is used. Mostly, occupancy sensor and photosensors are used in corridors. The corridor is not always occupied with people, rather people are moving continuously in a corridor. So, required illumination in a corridor is less as compared with a room or a hall. The twilight and night time illumination requirements are different and have additional behavioral and security issues associated. For corridors, required illumination or light intensity usually ranges from 50 to 100 lux [1]. The main aim of this paper includes the study and analysis of the good practice of energy-efficient lighting for corridor. The major findings in this study are that the energy-efficient lighting design could still be achieved without sacrificing the visual comfort and aesthetic requirement of the building, which is always a major issue of the owner. However, Energy-efficient lighting could be more easily implemented if it is considered right from the early design stage. The proposed lighting control system is based on microcontroller and uses LED based luminaries as light source. The system includes patterning of luminaries for e in day and at night. This system uses photosensor and controls the illumination in a corridor depending upon the light intensity.
Glare is an important factor which affects the comfort of the occupant in any space. It causes vi... more Glare is an important factor which affects the comfort of the occupant in any space. It causes visual fatigue and strain. Usually, it is ignored by the people working in indoor spaces. Fluorescent lamps which were used by the people from many years also causes glare. Nowadays, most of the traditional lamps were replaced by the LED lamps. However, LED lamps can cause glare due to its small size and greater lumen output. The effect of glare depends on the size of the source, the contrast between the background light and glare source and even the age of the viewer. It is very complex to measure glare accurately. This paper presents the comparison of glare due to LED and fluorescent lamp. The glare is evaluated using DIALux lighting simulation software from the point of view of observers/occupants in a particular location in the room. The comparison of the glare due to fluorescent lamp and LED is presented. Further, the paper suggests the best luminaire arrangement which causes minimum ...
Smart home is a house that uses technology to monitor the environment with the help of various se... more Smart home is a house that uses technology to monitor the environment with the help of various sensors, control the electrical appliances and communicate the outer world. Now-a-days the demand for home automation systems in homes and offices are invariably increasing. The home automation system is a key for energy conservation that can be equipped in normal buildings. As there are many benefits of wireless technology over wired, most of the home automation systems are based on the WSN technology. In this paper we present the design and implementation of a smart home based on LabVIEW using wireless sensor network system. The system can monitor the temperature, light, fire & burglar alarm of the house and have infrared sensor to guarantees the family security. The monitored data is automatically stored into an excel file. The system can be connected to internet to monitor the security of home from anywhere in the world.
PurposeThe purpose of this paper is to investigate and report the impact of glass frit variation ... more PurposeThe purpose of this paper is to investigate and report the impact of glass frit variation in silver thick film pastes used as surface conductors in low temperature co‐fired ceramics technology (LTCC), especially on the properties such as warpage of LTCC associated with conductors, microstructure of the fired thick films, sheet resistance and adhesion on LTCC.Design/methodology/approachSilver thick film paste compositions were formulated by changing the silver glass frit ratio. The compatibility of these formulated paste compositions with LTCC (DP 951AX) substrate were evaluated. The properties such as microstructure developments, the change in sheet resistance, warpage of LTCC substrate with respect to glass frit ratio of the developed silver films on LTCC were evaluated.FindingsThe results reveal that the glass frit percentage used in paste formulation is equally responsible for the disturbance in the properties such as microstructure, warping and electrical properties of th...
Smart space is usually an environment of any building, University campus, outdoor areas that are ... more Smart space is usually an environment of any building, University campus, outdoor areas that are enabled for interfacing the objects or systems and ubiquitous interaction with the users or visitors. A smart space enhances users experience in the space and provides an environment to perform his everyday activities more easily. However, creating such smart spaces or environments is really a challenge, as the human needs are changing all the time. To cope-up with the available technology and user"s requirements is a difficult task. This paper proposes the design framework of Smart Space based on various aspects such as physical space, its architecture, context, cognitive psychology, technology etc. The methodology of designing a smart space is also explained with the help of flowchart and it is illustrated by a set of system prototypes especially designed for the corridor of a building.
International Journal of Sustainable Lighting, 2018
Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent... more Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent. So, it is very difficult to measure glare factor accurately. Glare can be disabling or uncomfortable. Disability glare is the reduction in vision caused by bright light sources and it can be increased with the age of a person. Discomfort glare is a sensation of irritation due to bright light sources. There are various methods to evaluate discomfort glare. These methods are discussed in this paper. This paper mainly focuses on two methods of discomfort glare evaluation; Unified Glare Rating (UGR) and Daylight Glare Probability (DGP). These glare factors are calculated by using DIALux lighting simulation software and by using developed program. The experimentation was carried out in two different spaces; Conference room and Optoelectronics laboratory. The values of UGR, daylight factor are calculated by using DIALux and developed program. The comparison of the results obtained is discus...
Journal of Materials Science: Materials in Electronics, 2008
Ceramic technology has had an important role in microelectronics since 1960s and ceramic seems to... more Ceramic technology has had an important role in microelectronics since 1960s and ceramic seems to be a continuously developing, mature technology. Recently, development of low temperature co-fired ceramic technology (LTCC) has been geared up due to the huge demand of miniaturisation of electronic components. New materials are being developed for extending the demand of wide range of dielectric properties of LTCC, minimization of shrinkage, cambering of LTCC, high quality of conductors and patterning etc. This paper deals with formulation of silver conductor inks for LTCC and the effect of ink organics on the LTCC in particular to cambering/warpage, microstructure development were studied and presented.
Uniformity of illumination is of prime importance in the designing of lighting system. Often it i... more Uniformity of illumination is of prime importance in the designing of lighting system. Often it is achieved by measuring illuminance values on the target plane at predefined locations using luxmeter. To speed up the experimentation and to automate the measuring procedure, a portable test-jig is developed at work place. It acquires illuminance data from sixteen predefined locations on target surface simultaneously. The data is used for computing uniformity of illumination. The test-jig consists of photo sensors, Data Acquisition System (DAS) and control system. The photo sensors are fixed on a flex sheet which can be rolled. The sheet is spread over the surface whose uniformity is to be measured. The portable, automated test-jig gives the uniformity of illumination quickly. The test-jig is used to evaluate the performance of three luminaries viz. incandescent bulb, CFL and LED. Results confirm that LED bulbs are energy efficient than others giving more illuminance without hampering illumination uniformity. LED luminaire of 6 W illuminates 1m X 1m target surface having uniformity in the range of 0.4 – 0.73 for target-source distance of 50cm – 170cm. Dependence of uniformity on source wattage and view angle is also reported.
ABSRACT:Energy efficient corridor illumination in commercial and residential buildings is becomin... more ABSRACT:Energy efficient corridor illumination in commercial and residential buildings is becoming increasingly important in the energy conservation era. Lighting control systems with adequate algorithms are basically used for energy saving. The integration of daylight with electric light in building corridors during daytime hours is a key element in designing the lighting control system. The most common form of electric lighting control is the on/off "toggle" switch. Other forms of lighting control include occupancy sensors, daylight sensors, clock switches, a variety of manual and automatic dimming devices, and centralized controls. The selection of sensor and type of lighting control depends on the application and the area where it is used. Mostly, occupancy sensor and photosensors are used in corridors. The corridor is not always occupied with people, rather people are moving continuously in a corridor. So, required illumination in a corridor is less as compared with a room or a hall. The twilight and night time illumination requirements are different and have additional behavioral and security issues associated. For corridors, required illumination or light intensity usually ranges from 50 to 100 lux [1]. The main aim of this paper includes the study and analysis of the good practice of energy-efficient lighting for corridor. The major findings in this study are that the energy-efficient lighting design could still be achieved without sacrificing the visual comfort and aesthetic requirement of the building, which is always a major issue of the owner. However, Energy-efficient lighting could be more easily implemented if it is considered right from the early design stage. The proposed lighting control system is based on microcontroller and uses LED based luminaries as light source. The system includes patterning of luminaries for e in day and at night. This system uses photosensor and controls the illumination in a corridor depending upon the light intensity.
Glare is an important factor which affects the comfort of the occupant in any space. It causes vi... more Glare is an important factor which affects the comfort of the occupant in any space. It causes visual fatigue and strain. Usually, it is ignored by the people working in indoor spaces. Fluorescent lamps which were used by the people from many years also causes glare. Nowadays, most of the traditional lamps were replaced by the LED lamps. However, LED lamps can cause glare due to its small size and greater lumen output. The effect of glare depends on the size of the source, the contrast between the background light and glare source and even the age of the viewer. It is very complex to measure glare accurately. This paper presents the comparison of glare due to LED and fluorescent lamp. The glare is evaluated using DIALux lighting simulation software from the point of view of observers/occupants in a particular location in the room. The comparison of the glare due to fluorescent lamp and LED is presented. Further, the paper suggests the best luminaire arrangement which causes minimum ...
Smart home is a house that uses technology to monitor the environment with the help of various se... more Smart home is a house that uses technology to monitor the environment with the help of various sensors, control the electrical appliances and communicate the outer world. Now-a-days the demand for home automation systems in homes and offices are invariably increasing. The home automation system is a key for energy conservation that can be equipped in normal buildings. As there are many benefits of wireless technology over wired, most of the home automation systems are based on the WSN technology. In this paper we present the design and implementation of a smart home based on LabVIEW using wireless sensor network system. The system can monitor the temperature, light, fire & burglar alarm of the house and have infrared sensor to guarantees the family security. The monitored data is automatically stored into an excel file. The system can be connected to internet to monitor the security of home from anywhere in the world.
PurposeThe purpose of this paper is to investigate and report the impact of glass frit variation ... more PurposeThe purpose of this paper is to investigate and report the impact of glass frit variation in silver thick film pastes used as surface conductors in low temperature co‐fired ceramics technology (LTCC), especially on the properties such as warpage of LTCC associated with conductors, microstructure of the fired thick films, sheet resistance and adhesion on LTCC.Design/methodology/approachSilver thick film paste compositions were formulated by changing the silver glass frit ratio. The compatibility of these formulated paste compositions with LTCC (DP 951AX) substrate were evaluated. The properties such as microstructure developments, the change in sheet resistance, warpage of LTCC substrate with respect to glass frit ratio of the developed silver films on LTCC were evaluated.FindingsThe results reveal that the glass frit percentage used in paste formulation is equally responsible for the disturbance in the properties such as microstructure, warping and electrical properties of th...
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Papers by Dr. Jayashri Bangali