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Your search keyword '"Küchenhoff, Helmut"' showing total 13 results
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13 results on '"Küchenhoff, Helmut"'

9. Lebertransplantation mit Spendern >= 80 Jahre - Grenze der Organakzeptanz oder zukünftige Routine?

Author

Pratschke, Sebastian, Bösch, Florian, Andrassy, Joachim, Rogiers, Xavier, Meiser, Bruno, Bender, Andreas, Küchenhoff, Helmut, Werner, Jens, Guba, Markus, and Angele, Martin

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Einleitung: Der demographische Wandel und der herrschende Organmangel führen zu einem zunehmenden Angebot hochbetagter Spender über 80 Jahre zur Lebertransplantation. Jedoch fehlen Daten zu Grenzen der Organakzeptanz sowie Leitlinien zu Selektionskriterien und zusätzlichen spender- und[for full text, please go to the a.m. URL], 132. Kongress der Deutschen Gesellschaft für Chirurgie

Published
2015

10. Monitoringbericht 2015 zur Deutschen Anpassungsstrategie an den Klimawandel

Author

Schönthaler, Konstanze, Andrian-Werburg, Stefan Von, Pieck, Sonja, Tröltzsch, Jenny, Nickel, Darla, Lange, Marlene, Lukat, Evelyn, Stein, Ulf, Sukopp, Ulrich, Dröschmeister, Rainer, Heiland, Stefan, Radtke, Laura, Schliep, Rainer, Bartz, Robert, Kowarik, Ingo, Dziock, Frank, Dziock, Silvia, Schäffler, Livia, Siedentop, Stefan, Fina, Stefan, Sudfeldt, Christoph, Trautmann, Sven, Küchenhoff, Helmut, Shuai Shao, Thomas, Deutschländer, Rauthe, Monika, and Friedrich, Karsten

Published
2015
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11. An exact algorithm for estimating breakpoints in segmented generalized linear models

Author

Küchenhoff, Helmut

Subjects
Computer Science::Programming Languages
Abstract

We consider the problem of estimating the unknown breakpoints in segmented generalized linear models. Exact algorithms for calculating maximum likelihood estimators are derived for different types of models. After discussing the case of a GLM with a single covariate having one breakpoint a new algorithm is presented when further covariates are included in the model. The essential idea of this approach is then used for the case of more than one breakpoint. As further extension an algorithm for the situation of two regressors each having a breakpoint is proposed. These techniques are applied for analysing the data of the Munich rental table. It can be seen that these algorithms are easy to handle without too much computational effort. The algorithms are available as GAUSS-programs.

Published
1996
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12. Extreme value analysis of Munich airpollution data

Author

Küchenhoff, Helmut and Thamerus, Markus

Abstract

We present three different approaches to model extreme values of daily air pollution data. We fitted a generalized extreme value distribution to the monthly maxima of daily concentration measures. For the exceedances of a high threshold depending on the data the parameters of the generalized Pareto distribution were estimated. Accounting for autocorrelation clusters of exceedances were used. To get information about the relationship of the exceedance of the air quality standard and possible predictors we applied logistic regression. Results and their interpretation are given for daily average concentrations of ozone and of nitrogendioxid at two monitoring sites within the city of Munich.

Published
1995
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13. [Effects of the housing climate on the foot pad health of fattening turkeys of British United Turkeys 6 origin during the early rearing phase].

Author

Ziegler N, Bergmann S, Hübel J, Bartels T, Schumacher C, Bender A, Casalicchio G, Küchenhoff H, Krautwald-Junghanns ME, and Erhard M

Subjects
Ammonia analysis, Animal Husbandry methods, Animals, Dust analysis, Female, Humidity, Male, Temperature, Air Pollution, Indoor analysis, Animal Husbandry standards, Foot pathology, Housing, Animal standards, Turkeys classification, Turkeys physiology
Abstract

The climate in the stables during the turkeys' first weeks of life is a crucial factor for a successful rearing and the following fattening period. The present study has examined the influence of climate parameters on the foot pad health status of 2681 fattened turkeys from twelve farms during the early rearing phase. In addition to wide-ranging collections of data concerning livestock husbandry and management an examination of the foot pads of 60 animals has been carried out respectively on day 3-5, as well as on day 22-35, shortly before relocation into another stable. For assessing the foot pads a scheme of five categories has been used (ranging from category 0 = no alteration to category 4 = deep lesion). Solely beak trimmed turkeys of the British United Turkeys (BUT) 6 strain, male and female, were examined. In twelve farms air temperature and humidity have been recorded continuously, ammonia and dust concentration were registered on each day of the examination. When assessing the foot pads, the first alterations could already be noted at the age of 3-5 days. On the second period of exzmination 55.6% of the turkeys showed category 2 or category 3. Examinations of the climate parameters showed strong differences concerning temperature, humidity and ammonia concentration among all farms. Using the Fisher's Exact Test, significant dependency of foot pad health on starting temperature (p < 0.001), on temperature measured one week before the second examination (p = 0.004), on humidity (p < 0.001), and on air ammonia concentration (p < 0.001) could be indicated.

Published
2013

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