Swedish Defence Research Agency

About: Swedish Defence Research Agency is a government organization based out in Stockholm, Sweden. It is known for research contribution in the topics: Radar & Synthetic aperture radar. The organization has 1413 authors who have published 2731 publications receiving 56083 citations. The organization is also known as: Totalförsvarets forskningsinstitut.

Intrusion detection and the role of the system administrator

Abstract: Purpose – The expertise of a system administrator is believed to be important for effective use of intrusion detection systems (IDS). This paper examines two hypotheses concerning the system administrators' ability to filter alarms produced by an IDS by comparing the performance of an IDS to the performance of a system administrator using the IDS.Design/methodology/approach – An experiment was constructed where five computer networks are attacked during four days. The experiment assessed difference made between the output of a system administrator using an IDS and the output of the IDS alone. The administrator's analysis process was also investigated through interviews.Findings – The experiment shows that the system administrator analysing the output from the IDS significantly improves the portion of alarms corresponding to attacks, without decreasing the probability that an attack is detected significantly. In addition, an analysis is made of the types of expertise that is used when output from the IDS i...

Growth and Characterization of Na0.5K0.5NbO3 Thin Films on Polycrystalline Pt80Ir20 Substrates

Abstract: Na0.5K0.5NbO3 thin films have been deposited onto textured polycrystalline Pt80Ir20 substrates using radio frequency magnetron sputtering. Films were grown in off- and on-axis positions relative to ...

Interdependence between consumption in the North and sustainable communities in the South

Abstract: The issues we want to address and discuss in this article are related to the interdependence between consumption in households in high-income countries and life in the low-income countries, seen in a sustainable perspective. In the consumer society the underlying premise is that ever-escalating consumption is accepted, even desirable. During the past decade, an increasing critique of consumer lifestyle has come from environmentalists, who argue that the resource use to maintain a consumer lifestyle is putting too hard a burden on the ecosystems. We give examples of the abundant evidence of interdependence between North and South at global levels, such as climate change and appropriation of ecosystem capacities, and related to specific types of consumption such as clothing, flowers, food and cosmetics. We argue that the loss of feedback to individual households in the North is a serious barrier for change towards more sustainable consumption habits, and raise a question about how impacts of production and consumption can be communicated to consumers. On the basis of previous and ongoing research, we highlight some impacts of positive and negative labelling schemes as well as extended environmental information.

Segmentation and classification of airborne laser scanner data for ground and building detection

Abstract: In this paper, a number of techniques for segmentation and classification of airborne laser scanner data are presented. First, a method for ground estimation is described, that is based on region growing starting from a set of ground seed points. In order to prevent misclassification of buildings and vegetation as ground, a number of non-ground regions are first extracted, in which seed points should be discarded. Then, a decision-level fusion approach for building detection is proposed, in which the outputs of different classifiers are combined in order to improve the final classification results. Finally, a technique for building reconstruction is briefly outlined. In addition to being a tool for creating 3D building models, it also serves as a final step in the building classification process since it excludes regions not belonging to any roof segment in the final building model.

Microscopic identification and electronic structure of a di-hydrogen-vacancy complex in silicon by optical detection of magnetic resonance.

Abstract: We present a microscopic identification of a hydrogen-related-complex defect in electron-irradiated, hydrogenated, boron-doped, single-crystalline silicon, by optical detection of magnetic resonance. The symmetry of this defect has been deduced as C 2v , and from the observed hyperfine interactions the defect is identified as a di-hydrogen-vacancy complex, where the H atoms passivate two of the four dangling bonds in a monovacancy. A spin triplet is the lowest electronic excited state of the defect, which exhibits a strong recombination channel for the free carriers