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Search Results: 1 - 10 of 462484 matches for " A. Winkler "
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Zentraler Wirkansatz - wie und warum?
Winkler A
Journal für Urologie und Urogyn?kologie , 2001,
Abstract:
Anisotropies of anhysteretic remanence and magnetic susceptibility of marly clays from Central Italy
A. Winkler,L. Sagnotti
Annals of Geophysics , 1994, DOI: 10.4401/ag-4190
Abstract: Marly clays from an Upper Pliocene unit at Valle Ricca (Rorne) were investigated for their Anisotropy of Anhysteretic Remanence (AAR) and Anisotropy of Magnetic Susceptibility (AMS). The study of AAR was accomplished for the first time in ltaly, developing a suitable laboratory technique and adapting a standard statistical procedure. The comparison between anhysteretic remanence and magnetic susceptibility anisotropies discriminates the fabric of the ferromagnetic fraction from that of the paramagnetic matrix of the rock. The separation of fabric components was applied to distinguish subsequent geological processes that affected the total rock fabric. The results indicate that the clayey units are particularly suitable for the empirical investigation of fabric to strain relationship in weakly deformed rocks.
Improved Representation of Biological Information by Using Correlation as Distance Function for Heatmap Cluster Analysis  [PDF]
Axel Tiessen, Edgar A. Cubedo-Ruiz, Robert Winkler
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.83035
Abstract: Heatmap cluster figures are often used to represent data sets in the?omic sciences. The default option of the frequently used R heatmap function is to cluster data according to Euclidean distance, which groups data mainly to their numerical value and not to its relative behaviour. The disadvantage of using the default clustering?dendrograms of R is demonstrated. Instead, a script is provided that uses correlation as distance function, which better reveals biologically meaningful information. This optimized script was used to detect heterotic groups in Vitamaize hybrids (purple maize with high nutraceutical value). A field trial with different genetic combinations was performed through an agricultural phenomics approach (holistic evaluation of the phenotype). The grain yield data and other phenotypic variables were represented through heatmap figures. In the data set of Mexican tropical maize germplasm, at least three heterotic groups were detected, in contrast to only two heterotic groups reported earlier in temperate yellow maize from USA and Europe. This optimized script for heatmap correlation bicluster can also be used to better represent metabolomic fingerprints and transcriptomic data sets.
Long-Range and Many-Body Effects in Coagulation Processes
Anton A. Winkler,Erwin Frey
Physics , 2013, DOI: 10.1103/PhysRevE.87.022136
Abstract: We study the problem of diffusing particles which coalesce upon contact. With the aid of a non-perturbative renormalization group, we first analyze the dynamics emerging below the critical dimension two, where strong fluctuations imply anomalously slow decay. Above two dimensions, the long-time, low-density behavior is known to conform with the law of mass action. For this case, we establish an exact mapping between the physics at the microscopic scale (lattice structure, particle shape and size) and the macroscopic decay rate in the law of mass action. In addition, we identify a term violating this classical law. It originates in long-range and many-particle fluctuations and is a simple, universal function of the macroscopic decay rate.
Semiflexible polymers under external fields confined to two dimensions
A. Lamura,R. G. Winkler
Physics , 2012, DOI: 10.1063/1.4772748
Abstract: The non-equilibrium structural and dynamical properties of semiflexible polymers confined to two dimensions are investigated by molecular dynamics simulations. Three different scenarios are considered: The force-extension relation of tethered polymers, the relaxation of an initially stretched semiflexible polymer, and semiflexible polymers under shear flow. We find quantitative agreement with theoretical predictions for the force-extension relation and the time dependence of the entropically contracting polymer. The semiflexible polymers under shear flow exhibit significant conformational changes at large shear rates, where less stiff polymers are extended by the flow, whereas rather stiff polymers are contracted. In addition, the polymers are aligned by the flow, thereby the two-dimensional semiflexible polymers behave similarly to flexible polymers in three dimensions. The tumbling times display a power-law dependence at high shear rate rates with an exponent comparable to the one of flexible polymers in three-dimensional systems.
Iodine—A Potential Antioxidant and the Role of Iodine/Iodide in Health and Disease  [PDF]
Rudolf Winkler
Natural Science (NS) , 2015, DOI: 10.4236/ns.2015.712055
Abstract: In human physiology, iodine is primarily noted for its role in thyroid function and less so for its many extrathyroidal functions, particularly those based on its antioxidant properties. As I- it protects against free radicals and peroxides. This is seen in vitro in decreased depolymerization of hyaluronic acid and increased antioxidant status in human serum, and in vivo in increased antioxidant enzyme activities and decreases of malondialdehyde and peroxides. It could be shown or deduced that balneotherapeutic applications of iodine/iodide have a positive effect on cardiocirculatory diseases, respiratory disorders, some eye diseases (dry eye, cataract, age-related macular degeneration), and other degenerative diseases connected with increased oxidative stress that are also treated by balneotherapy.


Asociación del color de la concha de reproductores de Argopecten purpuratus (Lamarck, 1819) con la supervivencia, crecimiento y desarrollo larval de sus progenies
García,Ricardo M; Winkler,Federico M;
Latin american journal of aquatic research , 2012,
Abstract: marine bivalve mollusks are extremely diverse in shell color and pigmentation patterns. such diversity is affected by environmental and genetic factors. some evidences in adult marine bivalves shows that individuals with low-frequency shell colors have lower growth rates and/or higher mortalities than those with the most frequent shell colors. knowing that argopecten purpuratus shell color variation is under genetic control, in this work we test the hypothesis that loci that control shell color variation also affect larvae's growth rate, survival and/or development rate. survival, growth and development rates were estimated in larvae produced in different crosses between brooders of a. purpuratus having low frequency shell colors (white or orange) and "normal" (brown) color. results showed no significant differences in growth rates between larvae produced by crosses that involved brown shell parents, or orange by white parents. however, progenies of self fertilized orange and white parents showed significant differences in growth among them, and a lower growth rate than the remaining crosses. results suggest that genes that control shell color variation in juvenile and adult a. purpuratus could affect the growth rates of their larvae, but not the development rate or survival.
Buscando Orientaciones: Pautas para la Ense?anza de la ética Profesional en Psicología en un Contexto con Impronta Postmoderna
Pasmanik,Diana; Winkler,María Inés?;
Psykhe (Santiago) , 2009, DOI: 10.4067/S0718-22282009000200003
Abstract: previous survey's results suggest that chilean psychologists prefer to make ethical decisions based on their personal judgment and professional experience, and place less value on the utilization of a professional code of ethics (alvear, pasmanik, winkler, & olivares, 2008). with this background, information was obtained in order to position the teaching of professional ethics in the transformation that is currently being experienced in higher education, and criteria for decision making on teaching ethics at the undergraduate level were also sought. some of the approaches to ethics education in psychology are presented and discussed, and guidelines are proposed for deciding what, when and how to teach ethics in psychology.
Praxis y ética en Psicología Comunitaria: Representaciones Sociales de Usuarias y Usuarios de Programas Comunitarios en la Región Metropolitana
Castillo,Jorge; Winkler,María Inés;
Psykhe (Santiago) , 2010, DOI: 10.4067/S0718-22282010000100003
Abstract: chilean community psychology has undergone an evolution that has positioned it as a reference in the institutional practices of psychosocial intervention. this has involved the standardization of interventions, resulting in the abandonment of some of the founding precepts of the discipline, in a context lacking ethical indications for the field. as a way of outlining the current disciplinary practices and their ethical implications, social representations of professional practice between clients of government and ngo social programs were investigated, through the realization of 4 participatory interviews with 32 clients. discourse analysis tools were used. the results show a strong appreciation of the relationship between client and professional, a progressive strengthening from individual work, professional dependence, and a series of correct and incorrect actions as perceived by the client.
Habitat utilisation by Cape mountain zebras in the Mountain Zebra National Park, South Africa
A. Winkler,N. Owen-Smith
Koedoe : African Protected Area Conservation and Science , 1995, DOI: 10.4102/koedoe.v38i1.308
Abstract: This study investigated the seasonal patterns of vegetation community use by the Cape mountain zebra within the Mountain Zebra National Park over one seasonal cycle. Day-time censuses revealed that the zebras utilised all the different vegetation commu- nities that were defined in the park, with the exception of the riparian bush community. Year-round the zebras made greatest use of the grassland vegetation communities, together with those shrubland and dwarf shrubland communities that offered high grass biomasses. Selectivity for vegetation communities was greatest during the wet season, when the zebras favoured those grassland communities on the plateaus over other vegetation communities on the mountain slopes and in the ravines. During the dry season the zebras showed a greater diversity in their use of vegetation communities, and made greater use of those vegetation communities on the mountain slopes and in the ravines. The results suggest that the seasonal variations in vegetation community use by the zebras were in response to changes in the annual rainfall pattern.
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