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Search Results: 1 - 10 of 2567 matches for " Horst Kramer "
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Boundaries of Smooth Strictly Convex Sets in the Euclidean Plane R2  [PDF]
Horst Kramer
Open Journal of Discrete Mathematics (OJDM) , 2017, DOI: 10.4236/ojdm.2017.72008
Abstract: We give a characterization of the boundaries of smooth strictly convex sets in the Euclidean plane R2?based on the existence and uniqueness of inscribed triangles.
Family of closed convex sets covering faces of a simplex
Horst Kramer,A. B. Németh
Mathematics , 2015,
Abstract: It is considered a special, convex variant of Sperner lemma type .
Early Childhood Education: Difficulties Creating and Changing Daily Practice  [PDF]
Sonia Kramer
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.56048
Abstract:

This paper is based on research carried out with children and adults at early childhood education institutions in Rio de Janeiro, Brazil. The research goals were to identify interactions between adults and children and to rethink pedagogical practice. The theoretical-methodological framework was based on language and culture studies, the sociology of childhood and anthropology. After studying children and adults in different contexts and early childhood education public policies and practice, the results present challenges of changing and creating early education practices in difficult contexts, especially with regard to the creation and use of spaces intended for children. This is the focus of the text, which is structured in three sections. Section one presents the theoretical and methodological issues. The second section analyzes three case studies developed in public pre-schools situated in different cities in the state of Rio de Janeiro. Section three presents conclusions and priorities for intervention and change concerning children, adults and their interactions.

Training Needs of International Medical Graduates [IMGs] in Psychiatry  [PDF]
Milton Kramer
Open Journal of Psychiatry (OJPsych) , 2014, DOI: 10.4236/ojpsych.2014.44036
Abstract: The potential shortage of psychiatrists over the next 5 - 10 years has focused attention on the need to recruit more IMGs to fill the needs rather than use nurse practitioners or physician assistants. IMGs make up about 1/3 of first year psychiatry residents. These individuals have been found to provide services to the poor, the elderly and the psychotic. The quality of their medical work has been found to be satisfactory. The training needs of these physicians require an understanding on the part of their teachers that they come from cultures with different values that we have. The extended families of these primarily Asian residents clash with our strong commitment to individualism. It leads to a We-self rather than our I-Self. This difference coupled with the stress of leaving to come to a new culture is a great stress. Their exposure to psychiatry has been limited. They request and need more interview demonstration and practice, ore feedback and examinations. They should have help in accent reduction. They should be exposed to the working of the hospital by sitting on departmental and hospital committees. The faculty should extend their social opportunities and work as mentors on joint projects. Courses on the history of American culture should be taught. Psychotherapy for them should be encouraged as well as teaching medical ethics. They must become the major educational concern for the department that they are in.
Identification of a novel Rev-interacting cellular protein
Susanne Kramer-H?mmerle, Francesca Ceccherini-Silberstein, Christian Bickel, Horst Wolff, Michelle Vincendeau, Thomas Werner, Volker Erfle, Ruth Brack-Werner
BMC Cell Biology , 2005, DOI: 10.1186/1471-2121-6-20
Abstract: Yeast-two hybrid screening of a T-cell cDNA library with Rev as bait led to isolation of a novel human cDNA product (16.4.1). 16.4.1-containing fusion proteins showed predominant cytoplasmic localization, which was dependent on CRM1-mediated export from the nucleus. Nuclear export activity of 16.4.1 was mapped to a 60 amino acid region and a novel transport signal identified. Interaction of 16.4.1 with Rev in human cells was shown in a mammalian two-hybrid assay and by colocalization of Rev and 16.4.1 in nucleoli, indicating that Rev can recruit 16.4.1 to the nucleus/nucleoli. Rev-dependent reporter expression was inhibited by overexpressing 16.4.1 and stimulated by siRNAs targeted to 16.4.1 sequences, demonstrating that 16.4.1 expression influences the transactivation function of Rev.These results suggest that 16.4.1 may act as a modulator of Rev activity. The experimental strategies outlined in this study are applicable to the identification and biological characterization of further novel Rev-interacting cellular factors.The human immunodeficiency virus (HIV) Rev protein is a small (116 amino acids) post-transcriptional activator of expression of incompletely spliced and unspliced HIV mRNAs. Since these HIV transcripts direct production of progeny virions, Rev is a crucial factor in HIV replication (for overview see [1]). Rev interacts with HIV mRNAs by binding to a structured RNA element called the RRE (Rev response element). Rev offsets the activities of inhibitory sequences (INS) in HIV-1 mRNAs [2,3] and promotes their export to the cytoplasm. Once in the cytoplasm, Rev may also stimulate production of viral proteins on translational level (reviewed in [4]).Rev characteristically localizes to the nucleus, where it accumulates in nucleoli. However, a proportion of the Rev molecules expressed in a cell continuously shuttles between nucleus and cytoplasm by using active transport mechanisms both for entry into and exit from the nucleus.Mutational analyses of the
Genetic and health issues emerging from sperm donation—The experiences and views of donors  [PDF]
Ken Daniels, Wendy Kramer
Advances in Reproductive Sciences (ARSci) , 2013, DOI: 10.4236/arsci.2013.13003
Abstract: 164 previous sperm donors completed an online survey regarding health and genetic experiences and views. Results highlight that donors desire to act responsibly with recruiting facilities is not always possible. Objective: Obtaining the views and experiences of sperm donors regarding health and genetic matters. Design: Online survey. Setting: Not applicable. Participants: 164 previous sperm donors. Interventions: Not applicable. Main outcome measures: Views and experiences on health and genetic issues. Results: A variety of approaches are adopted by recruiting facilities in regard to selection and post-donation factors. The vast majority of donors said they had not been contacted by the facility they donated at to update their medical information, while almost one quarter of donors indicated that a health or genetic risk factor had occurred. A great majority of donors felt that they had not received any education or counselling on the potential curiosities of donor conceived people. Donors sought to be honest and open with staff but often found there were difficulties in doing so. Conclusions: Overall, donors indicate that they see donating as involving responsibilities to the offspring and families. The study highlights however that their ability to act responsibly is limited by some of the interactions or lack of them with the facilities where they donated. Implications for recruiting facilities need to be considered.
Interacting electrons in a magnetic field in a center-of-mass free basis
Peter Kramer,Tobias Kramer
Physics , 2014, DOI: 10.1088/0031-8949/90/7/074014
Abstract: We present an extension of the spin-adapted configuration-interaction method for the computation of four electrons in a quasi two-dimensional quantum dot. By a group-theoretical decomposition of the basis set and working with relative and center-of-mass coordinates we obtain an analytical identification of all spurious center-of-mass states of the Coulomb-interacting electrons. We find a substantial reduction in the basis set used for numerical computations. At the same time we increase the accuracy compared to the standard spin-adapted configuration-interaction method (SACI) due to the absence of distortions caused by an unbalanced cut-off of center-of-mass excitations.
Exact electron states in 1D (quasi-) periodic arrays of delta-potentials
Peter Kramer,Tobias Kramer
Physics , 1999,
Abstract: Exact one-electron eigenstates in finite parts of 1D periodic and Fibonacci chains of attractive and repulsive delta potentials are computed and analyzed. Bloch and bound state boundary conditions are related in terms of transfer matrices. Scenarios of positive and negative energy are distinguished. The dependence on the potential strength parameter is analyzed. The scattering matrix is computed. Implications for the interpretation of band germs in quasiperiodic chains are discussed.
GRS Method for Uncertainty and Sensitivity Evaluation of Code Results and Applications
Horst Glaeser
Science and Technology of Nuclear Installations , 2008, DOI: 10.1155/2008/798901
Abstract: During the recent years, an increasing interest in computational reactor safety analysis is to replace the conservative evaluation model calculations by best estimate calculations supplemented by uncertainty analysis of the code results. The evaluation of the margin to acceptance criteria, for example, the maximum fuel rod clad temperature, should be based on the upper limit of the calculated uncertainty range. Uncertainty analysis is needed if useful conclusions are to be obtained from “best estimate” thermal-hydraulic code calculations, otherwise single values of unknown accuracy would be presented for comparison with regulatory acceptance limits. Methods have been developed and presented to quantify the uncertainty of computer code results. The basic techniques proposed by GRS are presented together with applications to a large break loss of coolant accident on a reference reactor as well as on an experiment simulating containment behaviour.
MARIO VARGAS LLOSA: LA FICCIONALIZACIóN DE LA HISTORIA EN LA GUERRA DEL FIN DEL MUNDO
Nitschack,Horst;
Revista chilena de literatura , 2011, DOI: 10.4067/S0718-22952011000300006
Abstract: in the novel the war of the end of the world (la guerra del fin del mundo) mario vargas llosa presents a rewriting and fictionalization of euclides da cunha's foundational text os sertdes. the article relates this novel to the radical change in mario vargas llosa's ideological and political convictions in the 1970s and intends to analyze how the author's neo-liberal positions are reflected in the poetics of this novel. the central argument is that in this process of fictionalization of euclides da cunha's text, two strategies can be discovered: the first being the individualization of history, that is, the narrative privileges the subjective experiences of the characters to explain their disposition to violence; the second refers to the fictionalization's paradox of pretending to represent the unrepresentable while letting the reader know that it is just fiction. in other words, the reader has to decide to what extent s/he is willing to identify the narration with the historical "truth". in both cases we are dealing with a poetics that values individual and subjective responsibility instead of the individual's dependence on the collective or the narrative's commitment to objectify history.
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