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Long-Term Shrinkage of High-Performance Concrete, HPC

In this article an extensive experimental and numerical study of shrinkage in HPC is outlined. For this purpose cylinders of eight qualities of concrete were studied. Parallel studies of autogenous, carbonation and drying shrinkage, hydration, internal relative humidity and strength were carried out. Previous research in the field is summed up. Finally the article presents the mechanisms of shrink

Probing the recreational home –The cultural probe as a communicative tool for researcher and user

How can qualitative, ethnographic and emotional aspects from probe users be mapped at the same time as they get something meaningful in return? The emphasis is here on intellectual rewards during probe work rather than future good designs that in a long term perspective can be beneficial for the probe user. This case study has elaborated the traditional use of cultural probes [1] with a selection

The Swedish periodical Tidskrift för hemmet and the English social debate in Sweden in the 1860s

Nineteenth-century Sweden saw a large increase in the translation of English source texts. This paper will show how the Swedish domestic journal Tidskrift för hemmet communicated an English cultural context to Swedish readers in the 1860s. Through reviews and accounts of the contemporary English social debate, as well as through original translations and adaptations of English texts, Tidskrift för

Two 130nm CMOS class-D RF power amplifiers suitable for polar transmitter architectures

Two class-D RF power amplifiers consisting of CMOS inverter chains have been designed and measured. The first amplifier operates at 1GHz and has a maximum output power of 12dBm, whereas the second operates at 1.5GHz and outputs a maximum of 6dBm. The amplifiers have been characterized for use in two different polar transmitter architectures, Pulse Width Modulation by Variable Gate Bias (PWMVGB) an

Interpretation of high-energy X-ray satellites of L2,3 emission bands of Na, Mg, Al and Si

The high-energy satellite of the L2,3 X-ray emission band in Na, Mg, Al and Si has for a long time been attributed to the decay of an initial state with two holes in the 2p shell. In particular, the satellite threshold has been assigned to an initial (2p2)1D state. It has recently been found that X-ray and Auger data give two different values for the energy of this doubly-ionized state, and attemp

Modeling of maintenance costs

Abstract in Undetermined Increased global competition demands for increased manufacturing costs awareness. Maintenance activities and strategies have been studied extensively, but few studies discuss maintenance costs. This paper presents a model for calculating performance-driven manufacturing costs (in currency/piece), including parameters for determining the maintenance costs in relation to the