Complex Random Vectors and ICA Models: Identifiability, Uniqueness and Separability

In this paper the conditions for identifiability, separability and uniqueness of linear complex valued independent component analysis (ICA) models are established. These results extend the well-known conditions for solving real-valued ICA problems to complex-valued models. Relevant properties of complex random vectors are described in order to extend the Darmois-Skitovich theorem for complex-valued models. This theorem is used to construct a proof of a theorem for each of the above ICA model concepts. Both circular and noncircular complex random vectors are covered. Examples clarifying the above concepts are presented.Comment: To appear in IEEE TR-IT March 200

Paving the Roadway for Safety of Automated Vehicles: An Empirical Study on Testing Challenges

The technology in the area of automated vehicles is gaining speed and promises many advantages. However, with the recent introduction of conditionally automated driving, we have also seen accidents. Test protocols for both, conditionally automated (e.g., on highways) and automated vehicles do not exist yet and leave researchers and practitioners with different challenges. For instance, current test procedures do not suffice for fully automated vehicles, which are supposed to be completely in charge for the driving task and have no driver as a back up. This paper presents current challenges of testing the functionality and safety of automated vehicles derived from conducting focus groups and interviews with 26 participants from five countries having a background related to testing automotive safety-related topics.We provide an overview of the state-of-practice of testing active safety features as well as challenges that needs to be addressed in the future to ensure safety for automated vehicles. The major challenges identified through the interviews and focus groups, enriched by literature on this topic are related to 1) virtual testing and simulation, 2) safety, reliability, and quality, 3) sensors and sensor models, 4) required scenario complexity and amount of test cases, and 5) handover of responsibility between the driver and the vehicle.Comment: 8 page

Kildegjennomgang. Middelalderske kirkesteder i Telemark fylke 

Kildegjennomgang for registering av middelalderske kirkesteder er utført av NIKU ved Jan Brendalsmo på oppdrag av Riksantikvaren. Forberedelse av kildetekstene for publisering og kopling til ID-nummer i Askeladden er gjort av Jan-Erik G. Eriksson, Riksantikvaren

Недифференцированная дисплазия соединительной ткани и малые аномалии сердца как предиктор развития нарушений ритма у пациентов с ишемической болезнью сердца

ОНТОГЕНЕЗМОРФОГЕНЕЗИШЕМИЧЕСКАЯ БОЛЕЗНЬ СЕРДЦ

Структурно-цитохимические особенности развивающихся почек крысят при антенатальном воздействии инкорпорированных радионуклидов

ГЛИКОПРОТЕИНЫПОЧКИРАДИОАКТИВНЫЕ ИЗОТОПЫРАДИОНУКЛИД

Quality and legal aspects in public care procurement

Purpose – The purpose of this paper is to assess the applicability of care quality concepts as contract award criteria for public procurement of health and social care, using the case of Sweden. Design/methodology/approach – Based on a literature review, European and Swedish legal texts, government regulations as well as 26 Swedish court review cases concerning care procurement have been analysed. Findings – Methods used for assessing care quality are seldom useful for predicting the quality to be delivered by a potential contractor. Legal principles of transparency and equal treatment of tenderers make it necessary to apply strict requirements for verification. Research limitations/implications – Results refer primarily to a Swedish context but could be applicable throughout the EU. Further studies of relations between award criteria and public/private collaborative practices for improving care quality during contractual periods are desirable. Practical implications – Local and regional procurement officials should benefit from a better understanding of how quality criteria should be designed and applied to the award procedures for care contracts. Care providers in the private sector would also be able to develop their quality strategies and present their abilities more efficiently when tendering for public contracts. Social implications – Issues of quality of health and social care are of obvious importance for social sustainability. Public awareness of care quality problems is evident and often a cause of media concern. Originality/value – This investigation pinpoints the difference between traditional care quality thinking and the legal principles underlying contract award in public procurement of care services