A series of laboratory studies were conducted to increase understanding of stable carbon (C/C) and hydrogen (D/H) isotope fractionation arising from methanogenesis by moderately thermophilic acetateand hydrogen-consuming methanogens. Studies of the aceticlastic reaction were conducted with two closely related strains of Methanosaeta thermophila. Results demonstrate a carbon isotope fractionatio...

The operation of self-efŽ cacy beliefs was investigated in a group of 81 participants between 73 and 97 years of age with intensive time samples including activities carried out at the moment a signal was received, their subjective difŽ culty, and concurrent mood in everyday life. In a two-level approach, occasion-level and person-level effects could be modelled simultaneously. Within individua...

In this study, we describe a simple and efficient method for on-chip storage of reagents for point-of-care (POC) diagnostics. The method is based on gelification of all reagents required for on-chip PCR-based diagnostics as a ready-to-use product. The result reported here is a key step towards the development of a ready and easy to use fully integrated Lab-on-achip (LOC) system for fast, cost-e...

Many aspects affect the way humans perform tasks, among others somebody’s personality and current exhaustion level. Under varying conditions the quality of the performance is known to vary as well, for example, due to biases that occur. This paper introduces a cognitive control model addressing these aspects. It has been formally specified, tested in simulations for various scenarios, and forma...

This paper represents a summary of primary empirical research on angel investing across the United States. Data is based on responses from 121 angel investors to a detailed survey reporting on 1,038 new venture investments and 414 exit events from those investments. These investors currently have approximately $100M invested in 624 ongoing new ventures. The one of a kind data set consists of in...

PURPOSE Hyperfractionation (HF) is the altered fractionation schedule most frequently studied in clinical Phase III trials. In this overview, surviving fractions, rates of complete responses, and estimates of the long-term locoregional tumor control probabilities after HF and conventional fractionated irradiation (CF) available from the various reports were compared. METHODS AND MATERIALS A m...

In this paper we discuss models for systems that support reading. Our account identifies important models and presents a framework for organizing them. To evaluate this account, we show its ability to suggest a wide range of text presentation systems, many of them novel. This evaluation not only provides interesting ideas for future systems, it also shows the usefulness of the account, and furt...