Around The World in Indie Days

Description: This student offers a paper on conceptualising and producing an indie music TV show.https://remix.berklee.edu/graduate-studies-global-entertainment-business/1000/thumbnail.jp

Effects of screened Coulomb impurities on autoionizing two-electron resonances in spherical quantum dots

In a recent paper (Phys. Rev. B {\bf 78}, 075316 (2008)), Sajeev and Moiseyev demonstrated that the bound-to-resonant transitions and lifetimes of autoionizing states in spherical quantum dots can be controlled by varying the confinment strength. In the present paper, we report that such control can in some cases be compromised by the presence of Coulomb impurities. It is demonstrated that a screened Coulomb impurity placed in the vicinity of the dot center can lead to bound-to-resonant transitions and to avoided crossings-like behavior when the screening of the impurity charge is varied. It is argued that these properties also can have impact on electron transport through quantum dot arrays

The Live experience of non-degree learners from a time modified traditional baccalaureate in nursing program

By the year 2016, it is projected that a million new and replacement nurses will be needed throughout the United States. The traditional 4-year baccalaureate program alone cannot adequately sustain this demand. The immediacy of the current nursing shortage demands our educational systems respond by building and maintaining a workforce that is sufficient to support the health care needs of our society. In an attempt to meet this challenge, nursing schools around the country began exploring the option of creating accelerated programs for those who already possess a bachelor\u27s degree in another field without compromising the integrity and quality of the education. In addition, another emerging trend is to accelerate the pace of the traditional 4-year baccalaureate program with minimal curricular or programmatic changes. The majority of the students in the program are non-degreed and reflect the characteristics of entry-level, traditional nursing students. The accelerated pace reduces the traditional 24 months of completion, to 16 months. The curricular components remain steady, however the time between semesters is collapsed, which may have ramifications not yet identified. For the purpose of this research these programs are branded as Time Modified Traditional Programs (TMTP). Based on an extensive literature review, little to no information exists on the effect this accelerated pace might have on this student population. The purpose of this phenomenological inquiry was to describe, interpret, and gain a deeper understanding of how non-degreed, traditional baccalaureate nursing students experience education in a Time Modified Traditional Program of study. Van Manen\u27s six research activities of hermeneutic phenomenology guided this study. Colaizzi\u27s 7-step method of data analysis operationalizes van Manen\u27s approach and was utilized for analyzing the research data. The question guiding this study was: What is the meaning and significance of the lived experience of a non-degreed learner enrolled in a time modified traditional baccalaureate nursing program? Ten participants voluntarily participated in this research. The findings of this research resulted in eight main themes and four subthemes that provide a thick, rich description of the phenomenon. Findings were validated through participant review and therefore, provide the fundamental structure of the essence of a TMTP--a pathway to professional identity. Understanding the meaning and significance of non-degreed learners enrolled in a time modified traditional baccalaureate nursing program has significant implications for nurse educators, nursing researchers, and future students in a TMTP. Time proved to be a noteworthy factor in the participant\u27s experiences. Due to the intensity of the program and time requirements, students often become disengaged from their previous lifestyles and relationships. Building a strong support system with faculty and peers and taking personal accountability for learning contributes to the overall success of the program

Functionals of exponential Brownian motion and divided differences

We provide a surprising new application of classical approximation theory to a fundamental asset-pricing model of mathematical finance. Specifically, we calculate an analytic value for the correlation coefficient between exponential Brownian motion and its time average, and we find the use of divided differences greatly elucidates formulae, providing a path to several new results. As applications, we find that this correlation coefficient is always at least 1/p2 and, via the Hermite–Genocchi integral relation, demonstrate that all moments of the time average are certain divided differences of the exponential function. We also prove that these moments agree with the somewhat more complex formulae obtained by Oshanin and Yor

Performance of the coupled cluster singles and doubles method on two-dimensional quantum dots

An implementation of the coupled-cluster single- and double excitations (CCSD) method on two-dimensional quantum dots is presented. Advantages and limitations are studied through comparison with other high accuracy approaches for two to eight confined electrons. The possibility to effectively use a very large basis set is found to be an important advantage compared to full configuration interaction implementations. For the two to eight electron ground states, with a confinement strength close to what is used in experiments, the error in the energy introduced by truncating triple excitations and beyond is shown to be on the same level or less than the differences in energy given by two different Quantum Monte Carlo methods. Convergence of the iterative solution of the coupled cluster equations is, for some cases, found for surprisingly weak confinement strengths even when starting from a non-interacting basis. The limit where the missing triple and higher excitations become relevant is investigated through comparison with full Configuration Interaction results.Comment: 11 pages, 1 figure, 5 table

Multiresolution schemes for time-scaled propagation of wave packets

We present a detailed analysis of the time scaled coordinate approach and its implementation for solving the time-dependent Schr\"odinger equation describing the interaction of atoms or molecules with radiation pulses. We investigate and discuss the performance of multi-resolution schemes for the treatment of the squeezing around the origin of the bound part of the scaled wave packet. When the wave packet is expressed in terms of B-splines, we consider two different types of breakpoint sequences: an exponential sequence with a constant density and an initially uniform sequence with a density of points around the origin that increases with time. These two multi-resolution schemes are tested in the case of a one-dimensional gaussian potential and for atomic hydrogen. In the latter case, we also use Sturmian functions to describe the scaled wave packet and discuss a multi-resolution scheme which consists in working in a sturmian basis characterized by a set of non-linear parameters. Regarding the continuum part of the scaled wave packet, we show explicitly that, for large times, the group velocity of each ionized wave packet goes to zero while its dispersion is suppressed thereby explaining why, eventually, the scaled wave packet associated to the ejected electrons becomes stationary. Finally, we show that only the lowest scaled bound states can be removed from the total scaled wave packet once the interaction with the pulse has ceased

Relativistic QRPA calculation of muon capture rates

The relativistic proton-neutron quasiparticle random phase approximation (PN-RQRPA) is applied in the calculation of total muon capture rates on a large set of nuclei from $^{12}$C to $^{244}$Pu, for which experimental values are available. The microscopic theoretical framework is based on the Relativistic Hartree-Bogoliubov (RHB) model for the nuclear ground state, and transitions to excited states are calculated using the PN-RQRPA. The calculation is fully consistent, i.e., the same interactions are used both in the RHB equations that determine the quasiparticle basis, and in the matrix equations of the PN-RQRPA. The calculated capture rates are sensitive to the in-medium quenching of the axial-vector coupling constant. By reducing this constant from its free-nucleon value $g_A = 1.262$ by 10% for all multipole transitions, the calculation reproduces the experimental muon capture rates to better than 10% accuracy.Comment: 19 pages, 5 figures, submitted to Phys. Rev.

Efficient Entropy Estimation for Mutual Information Analysis Using B-Splines

International audienceThe Correlation Power Analysis (CPA) is probably the most used side-channel attack because it seems to fit the power model of most standard CMOS devices and is very efficiently computed. However, the Pearson correlation coefficient used in the CPA measures only linear statistical dependences where the Mutual Information (MI) takes into account both linear and nonlinear dependences. Even if there can be simultaneously large correlation coefficients quantified by the correlation coefficient and weak dependences quantified by the MI, we can expect to get a more profound understanding about interactions from an MI Analysis (MIA). We study methods that improve the non-parametric Probability Density Functions (PDF) in the estimation of the entropies and, in particular, the use of B-spline basis functions as pdf estimators. Our results indicate an improvement of two fold in the number of required samples compared to a classic MI estimation. The B-spline smoothing technique can also be applied to the rencently introduced Cramér-von-Mises test