Basic Psychological Need Satisfaction, Stress-Related Appraisals, and Dancers’ Cortisol and Anxiety Responses \ud

Self-determination theory (Deci & Ryan, 2000) posits basic psychological need satisfaction (BPNS) as essential for optimal functioning and health. Grounded in this framework, the current study examined the role of BPNS in dancers’ cognitive appraisals and hormonal and emotional responses to performance stress. Dancers reported their degree of BPNS 1 month before a solo performance. Threat and challenge appraisals of the solo were recorded 2 hr before the performance. Salivary cortisol and anxiety were measured 15 min before, and 15, 30, 45, and 60 min postperformance. Higher BPNS was associated with lower cortisol responses and anxiety intensity. Challenge appraisals mediated the association between BPNS and cortisol. Threat appraisals mediated the BPNS–anxiety intensity relationship. These findings point to the potential importance of performers’ BPNS for optimal emotional and hormonal homeostasis in performance conditions.\ud \u

Tinie -- a software package for electronic transport through two-dimensional cavities in a magnetic field

Quantum transport has far-reaching applications in modern electronics as it enables the control of currents in nanoscale systems such as quantum dots. In this paper we introduce tinie: a state-of-the-art quantum transport simulation framework, which can efficiently perform first-principle calculations based on the Landauer-B\"uttiker formalism. The computational repertoire of tinie includes calculations of transmission, conductivity, and currents running through arbitrary multi-terminal two-dimensional transport devices, with additional tools that enable the computation of the local density of states. The generality of tinie ranges from wide-band approximation calculations to investigating systems subject to an external magnetic field. The future prospects of tinie include the simulation of, e.g., two-dimensional cavities, quantum dots, or molecular junctions. The package is written in Python 3.6, and its well-documented modular structure is designed with an intent to create a platform suited for continuous expansion and development. With tinie it is possible to obtain specific information about the effects of impurities and imperfections in quantum devices, particularly between ballistic and diffusive transport regimes

Pengaruh Model Pembelajaran Quantum Teaching Bermedia Peta Timbul Terhadap Hasil Belajar Kognitif Pada Materi Sistem Gerak Manusia Di Kelas VIII SMP Negeri 2 Menukung Tahun Pelajaran 2016/2017

Penelitian ini bertujuan untuk mengetahui penerapan model pembelajaran Quantum Teaching bermedia peta timbul terhadap hasil belajar kognitif siswa pada materi sistem gerak manusia. Pendekatan penelitian yang diterapkan dalam penelitian ini adalah pendekatan kuantitatif. Metode penelitian ini adalah penelitian eksperimen. Bentuk penelitian ini adalah Quasi Experimental dengan menggunakanNonequivalent Control Group Design. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII Sekolah Menegah Pertama Negeri 2 Menukung yang berjumlah 42 siswa. Sampel dalam penelitian adalah kelas VIIIA sebagai kelas eksperimen dengan jumlah siswa 21 orang dan kelas VIIIB sebagai kelas kontrol dengan jumlah siswa 21 orang. Teknik sampling yang digunakan adalah Sampling Jenuh. Alat pengumpulan data yang digunakan adalah, soal tes. Berdasarkan analisis data diperoleh hasil penelitian sebagai berikut: Hasil belajar kognitifrata-rata siswa setelah menggunakan model Quantum Teaching adalah 0,73 dengan kriteria tinggi, sedangkan hasil belajar kognitif rata-rata siswa setelah menggunakan metode konvensional adalah 0,23 kriteria rendah. Berdasarkan uji hipotesis pada posttest kelas eksperimen dan kelas kontrol diperoleh t hitung sebesar 6,12 dan t tabel sebesar 2,02108. Pengujian hipotesis membuktikan bahwa t hitung > t tabel (6,12 > 2,02108) yang artinya Ha diterima dan Ho ditolak. Hal ini menunjukkan bahwa terdapat perbedaan yang signifikan hasil belajar kognitif siswa pada materi sistem gerak manusia antara kelas eksperimen dan kelas kontrol

Dynamic quantum clustering: a method for visual exploration of structures in data

A given set of data-points in some feature space may be associated with a Schrodinger equation whose potential is determined by the data. This is known to lead to good clustering solutions. Here we extend this approach into a full-fledged dynamical scheme using a time-dependent Schrodinger equation. Moreover, we approximate this Hamiltonian formalism by a truncated calculation within a set of Gaussian wave functions (coherent states) centered around the original points. This allows for analytic evaluation of the time evolution of all such states, opening up the possibility of exploration of relationships among data-points through observation of varying dynamical-distances among points and convergence of points into clusters. This formalism may be further supplemented by preprocessing, such as dimensional reduction through singular value decomposition or feature filtering.Comment: 15 pages, 9 figure

Setting the stage: social-environmental and motivational predictors of optimal training engagement

In this paper, we will firstly explore the central tenets of SDT. Research that has examined the social-environmental and motivation-related correlates of optimal training, performance and health-related engagement through the theoretical lens of SDT will be reviewed. Drawing from SDT-driven work undertaken in educational, sport and dance settings, we will draw conclusions and suggest future directions from a research and applied perspective

Population inversion of a NAHS mixture adsorbed into a cylindrical pore

A cylindrical nanopore immersed in a non-additive hard sphere binary fluid is studied by means of integral equation theories and Monte Carlo simulations. It is found that at low and intermediate values of the bulk total number density the more concentrated bulk species is preferentially absorbed by the pore, as expected. However, further increments of the bulk number density lead to an abrupt population inversion in the confined fluid and an entropy driven prewetting transition at the outside wall of the pore. These phenomena are a function of the pore size, the non-additivity parameter, the bulk number density, and particles relative number fraction. We discuss our results in relation to the phase separation in the bulk.Comment: 7 pages, 8 Figure