Injection statistics simulator for dynamic analysis of noise in mesoscopic devices

We present a model for electron injection from thermal reservoirs which is applied to particle simulations of one-dimensional mesoscopic conductors. The statistics of injected carriers is correctly described from nondegenerate to completely degenerate conditions. The model is validated by comparing Monte Carlo simulations with existing analytical results for the case of ballistic conductors. An excellent agreement is found for average and noise characteristics, in particular, the fundamental unities of electrical and thermal conductances are exactly reproduced.Comment: 4 pages, revtex, 4 PS figures, accepted Semicond. Sci. Techno

Toward a New Theory of Gender Transcendence: Insights from a Qualitative Study of Gendered Self-Concept and Self-Expression in a Sample of Individuals Assigned Female at Birth

Sex and gender are two concepts that are often conflated in popular culture. However, those who experience dissonance between their assigned sex and gender identity intimately understand the difference between sex, a biologicallybased distinction, and gender, a confluence of social and behavioral factors that contribute to understanding who one is as well as how one is seen by others. The gendered self-understanding and self-expression of 170 North Americans who selfidentified as gender nonconforming and who were assigned female at birth were explored using a transpersonal lens and thematic analysis. Data suggested a range and variety of gendered self-concepts that aligned across two broad themes: binary (female/woman; male/man) and non-binary (gender nonbinary; trans masculine) gender core identities. Themes of gendered self-concept, expression in behavior, dress style and appearance, and surgical body modification are discussed. These data support the application of transpersonal theory to transgender identity development, and they underscore the need for more research to test the validity of a new theoretical model of gender transcendence discussed herein

Toward a New Theory of Gender Transcendence: Insights from a Qualitative Study of Gendered Self-Concept and Self-Expression in a Sample of Individuals Assigned Female at Birth

Sex and gender are two concepts that are often conflated in popular culture. However, those who experience dissonance between their assigned sex and gender identity intimately understand the difference between sex, a biologicallybased distinction, and gender, a confluence of social and behavioral factors that contribute to understanding who one is as well as how one is seen by others. The gendered self-understanding and self-expression of 170 North Americans who selfidentified as gender nonconforming and who were assigned female at birth were explored using a transpersonal lens and thematic analysis. Data suggested a range and variety of gendered self-concepts that aligned across two broad themes: binary (female/woman; male/man) and non-binary (gender nonbinary; trans masculine) gender core identities. Themes of gendered self-concept, expression in behavior, dress style and appearance, and surgical body modification are discussed. These data support the application of transpersonal theory to transgender identity development, and they underscore the need for more research to test the validity of a new theoretical model of gender transcendence discussed herein

Exploiting Evolution for an Adaptive Drift-Robust Classifier in Chemical Sensing

Gas chemical sensors are strongly affected by drift, i.e., changes in sensors' response with time, that may turn statistical models commonly used for classification completely useless after a period of time. This paper presents a new classifier that embeds an adaptive stage able to reduce drift effects. The proposed system exploits a state-of-the-art evolutionary strategy to iteratively tweak the coefficients of a linear transformation able to transparently transform raw measures in order to mitigate the negative effects of the drift. The system operates continuously. The optimal correction strategy is learnt without a-priori models or other hypothesis on the behavior of physical-chemical sensors. Experimental results demonstrate the efficacy of the approach on a real problem

New Stellar (n,γ)(n,\gamma) Cross Sections and The "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars"

Since April 2005 a regularly updated stellar neutron cross section compilation is available online at http://nuclear-astrophysics.fzk.de/kadonis. This online-database is called the "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" project and is based on the previous Bao et al. compilation from the year 2000. The present version \textsc{KADoNiS} v0.2 (January 2007) includes recommended cross sections for 280 isotopes between $^{1}$H and $^{210}$Po and 75 semi-empirical estimates for isotopes without experimental information. Concerning stellar $(n,\gamma)$ cross sections of the 32 stable, proton-rich isotopes produced by the $p$ process experimental information is only available for 20 isotopes, but 9 of them have rather large uncertainties of $\geq$9%. The first part of a systematic study of stellar $(n,\gamma)$ cross sections of the $p$-process isotopes $^{74}$Se, $^{84}$Sr, $^{102}$Pd, $^{120}$Te, $^{130}$Ba, $^{132}$Ba, $^{156}$Dy, and $^{174}$Hf is presented. In another application \textsc{KADoNiS} v0.2 was used for an modification of a reaction library of Basel university. With this modified library $p$-process network calculations were carried out and compared to previous results.Comment: Proceedings "International Conference on Nuclear Data for Science and Technology 2007", Nice/ Franc

Dynamic ordering of driven vortex matter in the peak effect regime of amorphous MoGe films and 2H-NbSe2 crystals

Dynamic ordering of driven vortex matter has been investigated in the peak effect regime of both amorphous MoGe films and 2H-NbSe2 crystals by mode locking (ML) and dc transport measurements. ML features allow us to trace how the shear rigidity of driven vortices evolves with the average velocity. Determining the onset of ML resonance in different magnetic fields and/or temperatures, we find that the dynamic ordering frequency (velocity) exhibits a striking divergence in the higher part of the peak effect regime. Interestingly, this phenomenon is accompanied by a pronounced peak of dynamic critical current. Mapping out field-temperature phase diagrams, we find that divergent points follow well the thermodynamic melting curve of the ideal vortex lattice over wide field and/or temperature ranges. These findings provide a link between the dynamic and static melting phenomena which can be distinguished from the disorder induced peak effect.Comment: 9 pages, 6 figure

Stellar (n,gamma) cross sections of p-process isotopes PartI: 102Pd, 120Te, 130,132Ba,and 156Dy

We have investigated the (n,gamma) cross sections of p-process isotopes with the activation technique. The measurements were carried out at the Karlsruhe Van de Graaff accelerator using the 7Li(p,n)7Be source for simulating a Maxwellian neutron distribution of kT = 25 keV. Stellar cross section measurements are reported for the light p-process isotopes 102Pd, 120Te, 130,132Ba, and 156Dy. In a following paper the cross sections of 168Yb, 180W, 184Os, 190Pt, and 196Hg will be discussed. The data are extrapolated to p-process energies by including information from evaluated nuclear data libraries. The results are compared to standard Hauser-Feshbach models frequently used in astrophysics.Comment: 13 pages, 4 figure