[Autonomous assitive robots for older people at home: An exploratory study : "He is always there for me-and I for him too"]. / Autonome Assistenzroboter für ältere Menschen zu Hause: Eine Erkundungsstudie : "Er ist immer für mich da ­ und ich auch für ihn".

The use of autonomous assistive robots in the domestic environment of old people and the possible effects on the quality of life is a relatively new field of research. Given the relatively limited technical robustness of these robots, autonomous assistive robots have only rarely been tested in real life situations; therefore, valid data in this field are very limited. This article reports on one of these rare exploratory trials in the domestic setting and examines the following questions: will people older than 60 years perceive living with an autonomous robot as a benefit or a burden? What impact could assistive robots have on the quality of life and loneliness? To explore the socioscientific aspects of these research questions, an autonomous robot was developed for use in private homes. The robot can move and approach people independently and accompany them through their daily lives. The robot was tested in 20 households of older people over 5 days without surveillance by members of the project. This evaluation investigated how old people experienced the robot in their homes and what effect it had on their daily routine and quality of life. The predominantly qualitative results demonstrated that the autonomous assistive SYMPARTNER robot was primarily received positively and it was considered to improve participants' daily life and mitigate the negative effects of living alone. The presented findings were derived from the 3­year project "SYMPARTNER" (2016-2019) funded by the Federal Ministry of Education and Research (BMBF).

Origin of the spin Seebeck effect in compensated ferrimagnets.

Magnons are the elementary excitations of a magnetically ordered system. In ferromagnets, only a single band of low-energy magnons needs to be considered, but in ferrimagnets the situation is more complex owing to different magnetic sublattices involved. In this case, low lying optical modes exist that can affect the dynamical response. Here we show that the spin Seebeck effect (SSE) is sensitive to the complexities of the magnon spectrum. The SSE is caused by thermally excited spin dynamics that are converted to a voltage by the inverse spin Hall effect at the interface to a heavy metal contact. By investigating the temperature dependence of the SSE in the ferrimagnet gadolinium iron garnet, with a magnetic compensation point near room temperature, we demonstrate that higher-energy exchange magnons play a key role in the SSE.

Experimental test of the spin mixing interface conductivity concept.

We perform a quantitative, comparative study of the spin pumping, spin Seebeck, and spin Hall magnetoresistance effects, all detected via the inverse spin Hall effect in a series of over 20 yttrium iron garnet/Pt samples. Our experimental results fully support present, exclusively spin current-based, theoretical models using a single set of plausible parameters for spin mixing conductance, spin Hall angle, and spin diffusion length. Our findings establish the purely spintronic nature of the aforementioned effects and provide a quantitative description, in particular, of the spin Seebeck effect.

Risk assessment in diabetes management: how do general practitioners estimate risks due to diabetes?

OBJECTIVES: To evaluate the ability of general practitioners (GPs) in Germany to estimate the risk of patients with diabetes developing complications. METHODS: An interview study using a structured questionnaire to estimate risks of four case vignettes having diabetes-specific complications within the next 10 years, risk reduction and life expectancy potential. A representative random sample of 584 GPs has been drawn, of which 150 could be interviewed. We compared GPs' estimates among each other (intraclass correlation coefficient (ICC) and Cohen's (multirater-) kappa) and with risks for long-term complications generated by the multifactor disease model "Mellibase", which is a knowledge-based support system for medical decision management. RESULTS: The risk estimates by GPs varied widely (ICC 0.21 95% CI (0.13 to 0.36)). The average level of potential risk reduction was between 47% and 70%. Compared with Mellibase values, on average, the GPs overestimated the risk threefold. Mean estimates of potential prolongation of life expectancy were close to 10 years for each patient, whereas the Mellibase calculations ranged from 3 to 10 years. CONCLUSIONS: Overestimation could lead to unnecessary care and waste of resources.