Linköping University

About: Linköping University is a education organization based out in Linköping, Sweden. It is known for research contribution in the topics: Population & Health care. The organization has 15671 authors who have published 50013 publications receiving 1542189 citations.

Technological innovation systems in contexts: conceptualizing contextual structures and interaction dynamics

Abstract: This paper addresses interactions between technological innovation systems (TIS) and wider "context structures". While TIS studies have always considered various kinds of contextual influences, we suggest that the TIS framework can be further strengthened by a more elaborated conceptualization of TIS context structures and TIS-context interactions. For that purpose, we identify and discuss four especially important types of context structures: technological, sectorial, geographical and political. For each of these, we provide examples of different ways in which context structures can interact with a focal TIS and how our understanding of TIS dynamics is enhanced by considering them explicitly. Lessons for analysts are given and a research agenda is outlined.

An Easily Accessible Isoindigo-Based Polymer for High-Performance Polymer Solar Cells

Abstract: A new, low-band-gap alternating copolymer consisting of terthiophene and isoindigo has been designed and synthesized. Solar cells based on this polymer and PC71BM show a power conversion efficiency of 6.3%, which is a record for polymer solar cells based on a polymer with an optical band gap below 1.5 eV. This work demonstrates the great potential of isoindigo moieties as electron-deficient units for building donor–acceptor-type polymers for high-performance polymer solar cells.

Long-term effects of an educational program for general practitioners given by the Swedish Committee for the Prevention and Treatment of Depression.

Abstract: In 1983-1984 the Swedish Committee for the Prevention and Treatment of Depression offered an educational program on diagnosis and treatment of depressive disorders to all general practitioners on the island of Gotland. The program has been carefully evaluated; 1982 was used as the baseline and the main evaluation was carried out in 1985. After the educational programs, the frequency of sick leave for depressive disorders decreased, the frequency of inpatient care for depressive disorders decreased to 30% of that at the baseline; the prescription of antidepressants increased, but prescription of major tranquilizers, sedatives and hypnotics decreased. The frequency of suicide on the island decreased significantly. This study describes the long-term effects. In 1988, 3 years after the project ended, the inpatient care for depressive disorders increased, the suicidal rate returned almost to baseline values and the prescription of antidepressants stabilized. Thus, the effects were strictly related in time to the educational programs, indicating that the effects were real and not only a coincidence with local trends on Gotland. Furthermore, the results indicate that educational programs that can have pronounced effects on the health care system have to be repeated approximately every 2 years if long-term effects are to be expected.

Modelica - A Unified Object-Oriented Language for System Modelling and Simulation

Abstract: A new language called Modelica for hierarchical physical modeling is developed through an international effort. Modelica 1.0 [http:// www.Dynasim.se/Modelica] was announced in September 1997. It is an object-oriented language for modeling of physical systems for the purpose of efficient simulation. The language unifies and generalizes previous object-oriented modeling languages. Compared with the widespread simulation languages available today this language offers three important advances: 1) non-causal modeling based on differential and algebraic equations; 2) multidomain modeling capability, i.e. it is possible to combine electrical, mechanical, thermodynamic, hydraulic etc. model components within the same application model; 3) a general type system that unifies object-orientation, multiple inheritance, and templates within a single class construct.