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Search Results: 1 - 10 of 3234 matches for " Fischer "
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Self-repairing material systems―a dream or a reality?  [PDF]
Hartmut Fischer
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.28110
Abstract: Currently, most industrial materials rely entirely on passive protection mechanisms; such me chanisms are readily applicable and universal for many different materials systems. However, they will always stay passive, and therefore their lifetime and functionality is limited and related to the amount of protective additives and the intensity of their consumption. Therefore, better, and preferentially active process for the protection/repair of damaged materials―selfrepairing processes―were developed and need to be developed further. Although it sounds futuristic or like a fiction in the modern, trendy times, which in many ways affects also directions of research; self healing of material systems exists already for a long time in all sorts of systems of materials or functionalities. The aim of this work is to go beyond the scope of a classical review the ones published recently in this field which almost entirely focused only onto polymeric systems. In this work, an analysis of the underlying functional and constructional principles of existing natural and synthetically selfhealing systems spanning over a range of classes of materials is given leading to general rules and principles for the design of new and application tailored selfhealing material systems.
On the Ontology of Structural Realism  [PDF]
Markus Fischer
Open Journal of Political Science (OJPS) , 2019, DOI: 10.4236/ojps.2019.91008
Abstract: Due to its systemic approach, structural realism (or neorealism) can be subsumed under methodological holism, which takes social phenomena to be wholes that cannot be reduced to their parts. The wholes posited by structural realism are the state and the international structure. Recent developments in the philosophy of social science suggest that methodological holism ought to be limited to causal explanation and complemented by ontological individualism, which requires an account of how social wholes derive from individuals. Structural realism lacks such an account because it takes the state as an empirical given, mistaking for a fact what is really a concept in need of deductive derivation from individuals. To bring the theory methodologically up to date, this essay undertakes such a derivation of the state from individuals, proceeding in the deductive manner of political theory. It thus provides structural realism with a methodologically valid ontology, which, in turn, enables the theory to better defend itself against liberal and constructivist critics who reduce the state to a transient phenomenon.
Generality Challenges and Approaches in WSNs  [PDF]
Fadi TIRKAWI, Stefan FISCHER
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.21007
Abstract: Ignoring the generality in the design of Wireless Sensor Networks (WSNs) applications limits their benefits. Furthermore, the possibilities of future extension and adaptation are also restricted. In this paper, several methods to enhance the generality in WSNs are explained. We have further evaluated the suitability of these methods in centralized and de-centralized management scenarios.
Sexual assaults in therapeutic relationships: prevalence, risk factors and consequences  [PDF]
C. Eichenberg, M. Becker-Fischer, G. Fischer
Health (Health) , 2010, DOI: 10.4236/health.2010.29150
Abstract: A law has been passed in Germany (paragraph 174c StGB), which prohibits therapists from having sexual contact with their patients. This provides the background for a follow-up survey to the previous study completed by Becker- Fischer and Fischer in 1995. The results of this survey are discussed here on the basis of the current status of research concerning preva- lence and risk factors of sexual assaults in therapeutic relationships. The focus of the re- search lies in determining the specific condi- tions of sexual assaults in psychotherapy and psychiatry, risk variables of the therapists and patients, the effects it has on the patients as well as the legal consequences it results in. To en- sure the comparability of the data, an online version of the Questionnaire about Sexual Con- tacts in Psychotherapy and Psychiatry (SKPP; Becker-Fischer, Fischer & Jerouschek) was cre- ated and a survey of N = 77 affected patients was conducted. The majority of the participants in the study reported a serious decline in their overall well being following the incident. How- ever only very few undertook legal steps - only in three cases did it come to a legal procedure. The assumption that sexual contacts in psy- chotherapy result in extremely damaging con- sequences to patients, was affirmed. Despite the changed legal situation, therapists in Ger- many are still not held legally responsible more often than they were 10 years ago. Based on these results a more intensive education of the patients concerning their legal rights is recom- mended.
Moisture, Water Holding, Drying and Wetting in Forest Soils  [PDF]
Pavel Bla?ka, Zofia Fischer
Open Journal of Soil Science (OJSS) , 2014, DOI: 10.4236/ojss.2014.45021
Abstract: Relationship of soil and water is generally considered as important in soil science. To specify it further we studied two different soils in 2012-2013, three additional soils once and made several series of experiments with drying and wetting of the soils. Principal parameters studied were the gravimetric water content (GWC), water holding capacity (WHC), soil organic matter (SOM), their correlations and rates of change in drying or wetting. The three parameters are significantly inter-correlated. Distribution of GWC in the replicates of soils dried both in nature and in experiments was narrower than that in wet soils, while WHC changed less in drying. The correlations (GWC- WHC) became steeper (the slope coefficient higher) and the coefficient of determination (R2) lower. Attempts to increase WHC in wet soils with a high WHC even further were not successful. Drying may be fast or slow; rates of increase of WHC in wetting were all low, both in field and in the experiments, less than 0.1 g (H2O) g-1 (soil)·day-1. None of the three parameters can be considered as fixed characteristics of forest soils.



Soil Respiration in Drying of an Organic Soil  [PDF]
Zofia Fischer, Pavel Bla?ka
Open Journal of Soil Science (OJSS) , 2015, DOI: 10.4236/ojss.2015.59018
Abstract: Drying of soil was linearly related to time, soil volume decreased and ratio of air within the soils increased. Respiration was related with decreasing humidity, storage of CO2 in soil water results in RQ < 0.5 in the larger soil items at least for a while. Rate of drying decreased in the second part of the process. RQ increased as the CO2 stored was aerated when its solvent-water evaporated and access of air into the soil increased; eventually RQ = 1.0 in the last days of the experiment. Respiration of the experimental soil stopped when GWC reached 0.15. ΣRQ for the whole process is about 0.7, a bit higher in experiments with less soil suggesting less anoxia.
Why We Conform
Julia Fischer
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.1000277
Abstract:
Erblichkeitssch?tzung für verschiedene metaboliten im blutserum von bullen
NH Fischer
Genetics Selection Evolution , 1976, DOI: 10.1186/1297-9686-8-2-296a
Abstract:
Welcome to Journal of Sensor and Actuator Networks
Stefan Fischer
Journal of Sensor and Actuator Networks , 2012, DOI: 10.3390/jsan1010001
Abstract: Sensor and actuator networks have been the focus of a lot of research for quite a number of years now, and results in these fields had a tremendous influence on computer science as a whole. Take for example the fact that energy efficiency questions have never played a major role before, and today, there are journals, conferences, and complete research programs on this important issue. In general, sensor and actuator networks are considered to be an important part of the Future Internet, be it in the Internet-of-Things community, in Smart-City discussions, or in the more general field of Real-World Internet. Therefore, even though we have already come a long way, there is still a lot to do in order to make sensor and actuator networks usable and useful tools for everyday life in all kinds of domains. This new journal wants to provide a forum for researchers in the field to present their ideas and results and to discuss with others in order to advance the state of the art. [...]
LOS TEJIDOS ANDINOS, INDICADORES DE CAMBIO: APUNTES SOBRE SU ROL Y SIGNIFICADO EN UNA COMUNIDAD RURAL
Fischer,Eva;
Chungará (Arica) , 2011, DOI: 10.4067/S0717-73562011000200008
Abstract: andean textiles are artefacts with extraordinary qualities. apart from being tactile objects and transmission medium for socio-cultural information, for example about social status and esthetical values, they transfer data about local economies and historical incidents. the use of textiles creates relationships that crisscross all these domains. until the present time cloth produced on traditional weaving instruments takes a predominant role in andean local societies. it accompanies all moments of crisis during the life cycle and fulfils preserving functions that simultaneously form identity. recently a shift of the textiles’ roles can be detected that also is indicated by their importance. this alteration is linked with both, socio-political incidents currently taking place within the andean region and the local economic conditions influenced by the world system. the investigation of these processes along their break line holds the possibility of data collection with reference to the alteration and the formation of collective and individual identity. such a study also will offer solutions defined exclusively by the involved local actors.
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