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A method for improving plant availability with respect to utilities using buffer tanks

Disturbances on utilities, such as steam and cooling water, often cause large revenue losses at industrial sites. These disturbances are often hard to handle, since they commonly are plant-wide disturbances that affect more than one production area at the site. Also, the production areas of the site are often dependent on other production areas because of the flow of product through the site, whic

Evaluation of absorbed dose and image quality in mammography

Popular Abstract in Swedish Utvärdering av stråldos och bildkvalitet i mammografi Bröstcancer är den cancerform som är vanligast hos kvinnor. Genom tidig upptäckt med bröströntgen, mammografi, kan man behandla sjukdomen i ett tidigare stadium och därmed minska dödligheten. Det är också möjligt att behandla på ett skonsammare sätt vid tidig upptäckt. Därför har man startat hälsokontroller, screeniMammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduce the breast cancer mortality with about 30%. The side effects include a small and age related risk

Sinuosity effects on Longitudinal Dispersion Coefficient

A method for reaching longitudinal dispersion coefficient accounting sinuosity effects is suggested. The proposed method was verified using 43 sets of measured field data from previous study were collected from 30 streams and these data were chosen depends on characteristics availability (flow parameters, fluid properties and Sinuosity). Statistical programs namely MINITAB and SPSS were used to de

Exception Handling in S88 using Grafchart

Exception handling constitutes a large part of the design andimplementation effort in batch production, but so far little work hasbeen carried out to specify this area. This paper proposes an internalmodel approach for equipment unit supervision using Grafchart. It alsodiscusses exception handling at the recipe level.

Towards a new model of group development

Background: Current models of group development favor views assuming that groups move from relative irrationality and inefficiency to rationality and efficiency in defined sequential stages. Aims: To present (a) a project questioning the generality of the linear progressive models of group development, (b) an alternative model taking into account factors related to formation, time, boundary manag

Kvacksalveri om internetberoende

Det talas med jämna mellanrum om något som envist kallas “internetberoende”. Diskussionerna, som tycks blossa upp någon gång om året har en del gemensamma drag. Några sådana är exempelvis att de bygger på skrämselargument, att de ofta baseras på floskler och ovetenskap samt att de till synes med klockprecision sammanfaller med lanseringen av nya entreprenöriella behandlingsverksamheter som ska lös