| 31. |
- Gustafsson, Mats, et al.
(författare)
-
Physical bounds on the partial realized gain
- 2010
-
Ingår i: [Host publication title missing]. ; , s. 1-6
-
Konferensbidrag (refereegranskat)abstract
- An antenna identity, derived from the forward scattering sum rule, shows that the partial realized gain of an antenna is related to the polarizability of the antenna structure. The partial realized gain contains the mismatch, directivity, efficiency, and polarization properties of the antenna. The antenna identity expresses how the performance depends on the electrical size and shape of the antenna structure. It is also the starting point for several antenna bounds. In this paper, the identity, its associated physical bounds, and computational aspects of the polarizability dyadics are discussed.
|
|
| 32. |
|
|
| 33. |
- Haller, Henrik, et al.
(författare)
-
Organic By-Products For Sustainable Soil Remediation - The Effect Of 3 Different Amendments On The Degradation Of Diesel Fuel In A Tropical Ultisol.
- 2014
-
Ingår i: ECO-TECH 2014. - Kalmar : Linnaeus University.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In many tropical developing countries, economic incentives are small for soil remediation to take place. Such locations demand special strategies that are energy-efficient, locally adapted and economic. In situ technologies are appealing where energy and material costs are more limiting than the time factor. One potentially sustainable and economic way to enhance the self-organizing capacity of soil ecosystems is by applications of locally available organic by-products to stimulate the polluted ecosystem´s inherent capacity to heal by utilising the embodied energy of the organic pollutant itself, as an energy source for the necessary biochemical transformations. Tropical climate is favourable for biodegradation but many tropical soils are rich in clay which can inhibit the bioavailability of the pollutant and reduce biodegradation kinetics. A pilot scale experiment was performed in order to assess the capability of three amendments based on by-products; whey, pyroligneous acid and compost tea, to enhance degradation of diesel in ultisol. Biweekly applications of 6 mL whey kg-1 soilsignificantly increased the degradation rate but no positive effect on degradation was found of any of the other amendments.
|
|
| 34. |
|
|
| 35. |
- Haller, Henrik, 1977-, et al.
(författare)
-
Polluted lignocellulose waste as a resource for marketable products
- 2020
-
Ingår i: Proceedings Linnaeus ECO-TECH 2020. - 9789189081031
-
Konferensbidrag (refereegranskat)abstract
- Fiberbanks and fiber-rich sediments are legacies of the previously unregulated wastewater discharge from the pulp and paper industry that have accumulated large quantities of toxic organic waste on the Baltic Sea floor and on the bottom of rivers and lakes. Several km2 are covered with deposits of fibrous residues that are, typically, heavily polluted with a number of organic and inorganic substances, posing a serious threat to human and ecological health. High toxicity and the large volume of the polluted material are challenges for remediation endeavors. However, since the fibrous material is a bioresource with a high energy density, the sheer quantity of it could appeal to commercialization as feedstock for various marketable products. This study sets out to explore the potential of using this polluted material as a resource for industrial production, by reviewing and synthesizing data about modern production methods or reuse alternatives for lignocellulose material that can be adapted to a polluted feedstock. Biochemical methods such as composting, anaerobic digestion, as well as, thermochemical methods, for instance, HTC, HTL, pyrolysis, gasification etc. have been assessed. Potential end products from fiber bank material include biochar, liquid and gaseous biofuels, growth media, and fatty acids and proteins produced by white-rot fungi.
|
|
| 36. |
- Haller, Henrik, et al.
(författare)
-
TURNING WASTE INTO A RESOURCE FOR REMEDIATION OF CONTAMINATED SOIL IN TROPICAL DEVELOPING COUNTRIES
- 2012
-
Ingår i: PROCEEDINGS LINNAEUS ECO-TECH 2012. ; , s. 468-480
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Contaminated soil from industrial or agricultural activities poses a health threat to animals and humans and can also have a detrimental effect on economic systems by making land unsuitable for agriculture and other economic purposes. This problem is of particular concern in tropical developing countries where agriculture is the economic base. Traditional methods for soil remediation are often expensive and energy consuming. In-situ bioremediation has been proposed as a cheaper alternative to conventional methods in areas where remediation would otherwise not be implemented. Despite encouraging results in the laboratory, the practice of in-situ bioremediation is limited, partially due to its inefficiency at low temperatures. The objective of this study is to provide an inventory of some waste products that potentially can be used as amendments for in-situ bioremediation in developing countries in tropical climate. Emphasis has been given to map efficient methods that are appropriate to economically marginalised people in such countries. Waste from livestock operations, crop residues and processing waste constitute the major waste flows in many developing countries. A number of organic by-products can potentially be used to stimulate microbial activity for bioremediation purposes. Three amendments; whey, pyroligneous acid and compost teas were selected to be studied in detail due to their liquid nature and documented capacity to stimulate microorganisms with capacity to degrade pollutants. Experiments are needed to determine their potential for in-situ bioremediation in developing countries in tropical climate.
|
|
| 37. |
|
|
| 38. |
- Hoang, Hoai, et al.
(författare)
-
Deadline first scheduling in switched real-time Ethernet - deadline partitioning issues and software implementation experiments
- 2002
-
Ingår i: Euromicro RTS 2002. - Los Alamitos, Calif. : IEEE Computer Society. - 0769516653 - 9780769516653 - 076951667X - 9780769516677 ; , s. 68-71
-
Konferensbidrag (refereegranskat)abstract
- This paper presents work on a switched Ethernet network extended to allow for earliest deadline first (EDF) scheduling. We show by example that asymmetric deadline partitioning between the links of a real-time channel can increase the utilization substantially, still not violating the real-time guarantees. We also report measurements on a software implementation of the switch on an ordinary PC.
|
|
| 39. |
- Hoang, Hoai, et al.
(författare)
-
Switched real-time Ethernet with earliest deadline first scheduling - protocols and traffic handling
- 2002
-
Ingår i: Proceedings. - Los Alamitos, Calif. : IEEE Computer Society. - 0769515738 - 9780769515731 - 0769515746 - 9780769515748 - 0769515754 - 9780769515755 ; 5:1, s. 105-115
-
Konferensbidrag (refereegranskat)abstract
- There is a strong interest of using the cheap and simple Ethernet technology for industrial and embedded systems. This far, however, the lack of real-time services has prevented this change of used network technology. This paper presents enhancements to full-duplex switched Ethernet for the ability of giving throughput and delay guarantees. The switch and the end-nodes controls the real-time traffic with Earliest Deadline First (EDF) scheduling on the frame level. No modification to the Ethernet standard is needed in the network that supports both real-time and non-real-time TCP/IP communication. The switch is responsible for admission control where feasibility analysis is made for each link between source and destination. The switch broadcasts Ethernet frames regularly to clock synchronize the end nodes and to implement flow control for non-real-time traffic.
|
|
| 40. |
|
|
