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| 5. |
- Alström, Börje, et al.
(författare)
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Magasin i tryck på nätet
- 2006
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of the project is to investigate how peridical publisher use the possibilities offered by the Internet.
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| 6. |
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| 7. |
- Alström, Börje, et al.
(författare)
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Medietrender och papperskvalitet
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Tvår övergripande frågeställningar-vad styr magasins/tidskriftsförlagens val av papperskvalitet och påverkas läsarna av magasinens/tidskrifternas papperskvalitet. Studien omfattar sju delstudier med olika metoder.
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| 10. |
- Gao, Jinlan, et al.
(författare)
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Printed Humidity Sensor with Memory Functionality for Passive RFID tags
- 2013
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Ingår i: IEEE Sensors Journal. - 1530-437X .- 1558-1748. ; 13:5, s. 1824-1834
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a printed UHF RFID sensor solution that indicates whether a passive RFID tag has been exposed to a certain degree of humidity. The printed sensor operates as a Write Once Read Many (WORM) resistive memory as it permanently changes its resistance from about 2 kÙ to less than 50 Ù after exposure to humidity or water. The change of the sensor resistance is used to modulate the properties of a UHF RFID tag antenna by changing antenna input impedance and also introducing or removing ohmic losses in the antenna structure. The final result is reflected in the change of the minimum transmit power required to power-up the RFID tag. Both the sensor and the tag antenna are printed horizontally on a paper substrate. Different geometric combinations of sensor and antenna structures are investigated. Typical applications include non-invasive methods for detecting wetness or humidity levels in hidden locations such as within construction structures. The sensor setup can also serve to provide information as to whether a package sent over a supply chain has exceeded a certain level of humidity during its route.
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| 11. |
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| 12. |
- Gulliksson, Mikael
(författare)
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Landsortsjournalister i nyhetsflödet
- 2002
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Ingår i: Nyheter 2020 - rapport 2. - Sundsvall : Mitthögskolan, FSCN. ; , s. 97-114
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 13. |
- Holmberg, Susan, et al.
(författare)
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Swedish print and online newspapers
- 2005
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Ingår i: Print and online newspapers in Europé. - Amsterdam : Het Spinhuis. - 9055892386 ; , s. 326-
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 14. |
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| 15. |
- Neubauer, Björn, et al.
(författare)
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A new thermally activated battery cell-based forest fire detection and monitoring system
- 2012
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Ingår i: WIT Transactions on Ecology and the Environment. - Southampton : WIT Press. - 9781845645847 ; , s. 113-124
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Detection of forest wildfires at early stages can significantly improve the success of fire fighting and thus it contributes to the damage and cost reduction. Surface deployed sensor networks linked to global nets are often regarded as technically simple options to achieve forest fire detection and progress monitoring. Straightforward solutions with sensor nodes continuously supplying telemetric information demand heavy duty power supplies and periodic service. They are relatively expensive and commonly not environmentally friendly. We have suggested and currently develop an early warning forest fire detection system based on inexpensive, dormant fire-activated detecting sensors and a number of monitoring nodes in a network configuration. Small deploy-and-forget type sensors contain a radio transmitter with recorded identity number, together with an inactive power element. When activated by high temperature of a developing wildfire, this element produces enough power to support the transmitter, broadcasting the unique identity code until the sensor is completely burnt. Monitoring nodes of such system stand by for sensor activation and forward the alarm information along the monitoring nodes network. Implementation of anti-collision transmission protocols in the sensors allows the monitoring nodes to keep track of fire development and progress. Monitoring nodes and nodes linking the forest fire detection and monitoring net to public networks can be made using conventional technology and utilizing existing communication networks. Thus significant efforts have been directed to the design of the primary sensors, designing them to be cost efficient and minimizing their environmental impact. Cellulose-based materials are widely used in the sensor construction to decrease its environmental impact and cost. The core of the sensor power element is made of laminated and screen-printed cellulose- based substrates. The power element is activated by a small amount of water, trapped in crystal hydrate salts in storage and released by elevated temperatures of the fire. These salt-based sensors can be manufactured in a rollto- roll manner, making them cost effective. Absence of any liquids or gels in the sensor construction will guarantee a good shelf time. © 2012 WIT Press.
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| 16. |
- Nilsson, Hans-Erik, et al.
(författare)
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An incontinence alarm solution utilizing RFID based sensor technology
- 2011
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Ingår i: 2011 IEEE International Conference on RFID-Technologies and Applications, RFID-TA 2011. - Sitges : IEEE conference proceedings. - 9781457700279 ; , s. 359-363
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Konferensbidrag (refereegranskat)abstract
- The current work addresses the challenge of measuring urine volume in diapers primarily targeting geriatric care applications. There are number of incontinence alarm innovations suggested and described in patents and scientific reports. However, there are hardly any reports of such systems in permanent use in the hospital care market. One reason might be the challenging system requirements of such applications. According to our own experiences and requirements reported in the literature those are truly demanding. We need meter long communication range, passive sensor functionality, robust and safe measurement, unobtrusive sensor device design (patient) and a convenient reader and user interface (care personal). The list of specifications can be added to, a very low price adding only a small fraction to the over all diaper cost. Finally the system should improve the comfort of the patient and increase diaper management efficiency, reducing the costs of the care provider. The recent progress and usage of RFID technology have reduced the cost levels for inlays and readers. Thus, standard RFID inlays may be a candidate providing the targeted functionality in a smart diaper. In this work we evaluate the possibility to use the RFID antenna as the sensor element when detecting when a diaper has reached a certain degree of urine saturation. The evaluation has been done in a laboratory setup, with real test persons providing authentic readout scenarios. © 2011 IEEE.
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| 17. |
- Nilsson, Hans-Erik, et al.
(författare)
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Characterization of moisture sensor based on printed Carbon-Zinc energy cell
- 2005
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Ingår i: Polytronic 2005: 5th International Conference on Polymers and Adhesives in Microelectronics and Photonics - Proceedings. - Piscataway, NJ : IEEE conference proceedings. - 0780395530 ; , s. 82-85
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Konferensbidrag (refereegranskat)abstract
- In this work we present a simple printed moisture sensor fabricated using electronic inks on a multilayer paper structure. The sensor is based on a Carbon-Zinc type energy cell and provides power to a readout electronic circuit when activated by moisture. The sensors are based on a number of our filed patents according to which the sensor is used for both event detection and as a power source for the processing electronics. Typical applications are moisture and leakage detection in buildings, water pipe lines, smart packages and health care systems such as smart incontinence sensors. As the detector is triggered, it powers up an electronic circuit (polymer based or silicon based) that starts communication with the alarm server. In the simplest systems a sound or a light alarm is started to alert the user. In this work we present a characterization of some critical parameters of the sensor such as power driving capability, linearity, internal memory effects and saturation. In addition, we examine a specific application, when sensor is used as defrosting alarm for surveillance of frozen articles during transport.
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| 18. |
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| 19. |
- Nilsson, Hans-Erik, et al.
(författare)
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Printed write once and read many sensor memories in smart packaging applications
- 2011
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Ingår i: IEEE Sensors Journal. - 1530-437X .- 1558-1748. ; 11:9, s. 1759-1767
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Tidskriftsartikel (refereegranskat)abstract
- A horizontal printed Write Once Read Many (WORM) resistive memory has been developed for use in wireless sensortags targeting single event detection in smart packaging applications. The WORM memory can be programmed using a 1.5 V printedbattery. An alternative programming method is to use chemical sintering which allows the development of exposure-time triggeredsingle event tags that can be accessed wirelessly. The new WORM memory has very low losses in the ON-state which allows directintegration into antenna structures.A sensor tag that utilizes the WORM memory functionality and the well established Electronic Article Surveillance (EAS)communication standard has been outlined. Both active and fully passive sensor tag solutions have been proposed.The role of printed electronics in smart packaging applications has been reviewed and discussed. Important enabling factors forthe future development have been highlighted, such as the need for hierarchical design and test tools, better printed interconnecttechnologies as well as better components that allow communication with existing information and communication technology (ICT)standards. This is illustrated and underlined by the presented smart packaging concept demonstrators.
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| 20. |
- Nilsson, Hans-Erik, et al.
(författare)
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System integration of electronic functions in smart packaging applications
- 2012
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Ingår i: IEEE Transactions on Components, Packaging and Manufacturing Technology. - 2156-3950. ; 2:10, s. 1723-1734
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Tidskriftsartikel (refereegranskat)abstract
- A system integration scheme relevant for smart packaging applications is presented. Recent advances in printed electronics, radio frequency identification tag production, and standardization of communication protocols are factors that increase the design freedom for new applications. As in all new technology fields, the first products are expected to appear in the high-cost segment attracting early adopters in the form of niche products. A reasonable assumption is that these products will come from hybridization of different types of technologies. Such a scenario is likely since no technology solution available can provide all features that these types of applications demand. There is a need of standard solutions for hybridization of silicon devices and printed (or foil-type) components. Conductive ink technology is a powerful tool for hybridization and customization of large-area electronics, providing 3-D integration and large-area customization. However, high-performance communication and advanced processing demand the use of silicon. Smart hybridization solutions allow combination of the best from both worlds. This paper analyzes the requirements on hybridization technologies suitable for smart packaging applications and provides design examples on integration of intrusion surveillance solutions for cellulose-based packaging applications. It shows that even though the current hybridization technologies are far from optimal, they can provide a considerable design freedom and system performance. © 2011-2012 IEEE.
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| 21. |
- Olsson, Torbjörn, et al.
(författare)
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Deformed Bow-tie antenna
- 2003
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Ingår i: Antenn 03. Nordic Antenna Symposium, 13-15 May 2003 , Kalmar, Sweden. ; , s. 183-188
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Konferensbidrag (refereegranskat)abstract
- Antennas in some military applications can be expected to suffer from physical damage of the antenna structure itself. Examples are intelligent munitions when rammed into the gun barrel and vehicle mounted conformal antennas harmed by various types of mechanical impact. Another example is extremely low cost antenna applications. A Radio Frequency IDentification (RFID) system consists of a more or less advanced reader and a very simple tag that can be fastened onto a variety of surfaces. The tag incorporates a transceiver and can carry one or more sensing devices and report findings back to the reader. To keep costs down, low-cost standardized antennas will be used even when the tag is deployed in harsh environments. For the kind of antennas described above, a predictable graceful degradation of performance is appealing. A partial damage of the antenna must not lead to a system breakdown. An essential part of the antenna design must be to ensure robust communication even when the antenna is partially damaged. What performance can be expected from an antenna when part of its structure has been removed? In this paper this issue is examined for a bow-tie antenna when part of its structure has been removed. The structural deformation has been inflicted by removing stripes of the outer part of one of the antenna arms. The investigation was undertaken by simulations in a commercial Finite Integration (FI) program and by verifying measurements.
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| 22. |
- Sidén, Johan, et al.
(författare)
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An Action Activated and Self Powered Wireless Forest Fire Detector
- 2007
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Ingår i: IFIP International Federation for Information Processing. - Boston, MA : Springer. - 9780387748986 ; , s. 47-58
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Konferensbidrag (refereegranskat)abstract
- Placing fire detectors in a forest is usually associated with powering problems since the sensors do not have access to external power supply and a periodical change of internal batteries is an undesired option. This paper presents an approach where the fire sensor itself, when heated by nearby fire, generates electrical energy to power a radio transmitter. Presented energizing fire sensor is environmentally friendly and can be mass produced at a very low cost. Upon activation the sensor produces enough power necessary to operate most standard radio transmitters depending on what communication system is chosen for operation. The fire detector unit can be deployed from either helicopter or manually from the ground. The sensor can be designed to activate itself at different temperatures to suit different climate zones.,Rough guidelines are given for estimation of attenuation of radio wave propagation in forest areas in order to predict maximum transmit distance.
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| 23. |
- Sidén, Johan, et al.
(författare)
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Electric and Electromagnetic Coupled Sensor Components for Passive RFID
- 2011
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Ingår i: 2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2011. - : IEEE conference proceedings. - 9781457716928 ; , s. 1-5
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Konferensbidrag (refereegranskat)abstract
- This work discuss the possibilities of integrating passive sensor components to passive UHF RFID tags. The sensor system works by degrading a tag's communication performance in proportion to a sensed quantity. Two approaches are studied, sensors directly integrated to tag antenna structures and sensors electromagnetically coupled to tag antennas. The em coupled sensors provide the possibility to produce small sensor components as easily applied add-ons to ordinary commercial RFID tags.
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| 24. |
- Sidén, Johan, et al.
(författare)
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Home Care with NFC Sensors and a Smart Phone
- 2011
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Ingår i: ACM International Conference Proceeding Series. - New York, NY, USA : ACM Press. - 9781450309134
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Konferensbidrag (refereegranskat)abstract
- The world's aging population and limited hospital resources together with advancements in information technology provides a thorough basis for further development of tele-healthcare and assisted living. For ordinary people, and especially elderly people, to be diagnosed and treated in their homes there is a definite need for technical equipment that is extremely easy to handle. One way to facilitate tele-healthcare is to take advantage of modern cell phone technology and the infrastructure surrounding these units. Many elderly people are today comfortable with using cell phones and even advanced smart phones can be purchased to a cost that is low compared to corresponding specialized medical equipment. The concept presented in this work is based upon Near Field Communication (NFC), a wireless feature that is currently being widely launched in cell phones. Amongst other capabilities, NFC technology allows a phone to act as a 13.56 MHz RFID reader. This work shows how NFC-equipped phones can be used to read passive NFC tags that in turn are equipped with general resistive sensors and how sensor data are read and communicated to a web server without the need to push a single button. © 2011 ACM.
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| 25. |
- Sidén, Johan, et al.
(författare)
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The "Smart" Diaper Moisture Detection System
- 2004
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Ingår i: 2004 IEEE MITT-S International Microwave Symposium Digest, Jun 6-11 2004, Fort Worth, TX, United States. - : IEEE. - 0780383311 ; , s. 659-662
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Konferensbidrag (refereegranskat)
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