Wissenschaftliche Untersuchungen über die gesundheitliche Verträglichkeit enzymhaltiger Waschmittel

Scientific Investigations on the Tolerance of Enzyme-Containing Washing Agents Washing agents containing enzyme-additives appeared in the German market since 1966 on a wide scale. Today, in the entire western world, this type of detergent constitutes a considerable proportion (80%) of the total consumption of washing agents. In the present work based on experimental results, it is proved that enzyme-containing washing agents are not harmful to health. Test-procedures and results on the toxicity and irritation for these washing agents are reported for cutaneous application, and studies on skin-sensibilisation are described.     

A comparison of LISREL and two-stage least squares analysis of a hypothesized life–job satisfaction reciprocal relationship.

Investigated the nature of the relationship between life satisfaction and job satisfaction using both 2-stage least squares and the analysis of linear structural equations by LISREL. Both techniques provided the possibility of evaluating causal relationships that are bidirectional. 873 civil service workers were administered a battery of tests, including the Job Diagnostic Survey, the short form of the Minnesota Satisfaction Questionnaire, and the Rosenberg Self-Esteem Scale. Results are consistent with a model that hypothesizes a reciprocal relationship between job and life domains. Estimates of structural parameters were consistent across analysis techniques. (34 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Estimating the Optimal Margins of Embeddings in Euclidean Half Spaces

Concept classes can canonically be represented by matrices with entries 1 and –1. We use the singular value decomposition of this matrix to determine the optimal margins of embeddings of the concept classes of singletons and of half intervals in homogeneous Euclidean half spaces. For these concept classes the singular value decomposition can be used to construct optimal embeddings and also to prove the corresponding best possible upper bounds on the margin. We show that the optimal margin for embedding n singletons is and that the optimal margin for half intervals over {1,...,n} is . For the upper bounds on the margins we generalize a bound by Forster (2001). We also determine the optimal margin of some concept classes defined by circulant matrices up to a small constant factor, and we discuss the concept classes of monomials to point out limitations of our approach.     

The use of background and ability profiles to predict college student outcomes.

To determine whether profiles of predictor variables provide incremental prediction of college student outcomes, the authors 1st applied an empirical clustering method to profiles based on the scores of 2,771 entering college students on a battery of biographical data and situational judgment measures, along with SAT and American College Test scores and high school grade point average, which resulted in 5 student groups. Performance of the students in these clusters was meaningfully different on a set of external variables, including college grade point average, self-rated performance, class absenteeism, organizational citizenship behavior, intent to quit their university, and satisfaction with college. The 14 variables in the profile were all significantly correlated with 1 or more of the outcome measures; however, nonlinear prediction of these outcomes on the basis of cluster membership did not add incrementally to a linear-regression-based combination of these 14 variables as predictors. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cu materials—From crystal chemistry to magnetic model compounds

Based on electronic structure calculations within the density functional theory, we report a systematic approach for the modelling of low-dimensional Cu^II materials. Combining concepts of crystal chemistry with ab initio-based magnetic models, we present a systematic study of recently discovered compounds. Our calculation results are in good agreement with thermodynamic and magnetic measurements, suggesting the presented approach as a well-directed route to explore the magnetic phase diagram of low-dimensional Cu^II systems.     

Technical and Environmental Sustainability Assessment of Water Distribution Systems

An environmental and technical sustainability assessment methodology is developed for both centralized and dual water distribution systems (WDSs) with and without fire flow scenarios. Technical sustainability of potable and reclaimed water networks is measured by a sustainability index (SI) assessment using reliability, resiliency, and vulnerability performance criteria. The U.S. Environmental Protection Agency EPANET software is used to simulate hydraulic (i.e. nodal pressure) and water quality (i.e. water age) analysis in a WDS. Total fresh water use and total energy intensity are considered as environmental sustainability criteria. The procedure considers two separate alternatives for meeting fire flows: (1) adding pumping to a system or (2) adding a non-potable WDS. The reclaimed system is designed using linear programming (LP) optimization. For each alternative, multi-criteria decision analysis (MCDA) is used to combine technical and environmental sustainability criteria for an urban WDS.     

Zur Zellwandstruktur von 1600 Jahre altem, wassergesättigtem Eichenholz

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th century A.D.) was investigated by transmission electron microscopy. The studies on the cell wall fine structure revealed that in most cells the middle lamella and the innermost secondary wall layer (S3) remained structurally unaltered. On the other hand, the secondary wall layers S1 and S2 became heavily degraded. The characteristic degradation pattern indicates the involvement of bacteria.

     

Integrated-optic polarisation convertor on (001)-InP substrate

A novel TE/TM convertor is proposed and demonstrated which is fabricated on (001)-InP substrate and can be integrated with TE-TM phase shifters to provide a general polarisation transformation. Some aspects of the technological realisation and first results are given; in a first attempt, a polarisation rotation of about 20 deg by 20 V could be demonstrated.