Numerical solution of the Boltzmann equation for the collective modes of trapped Fermi gases

We numerically solve the Boltzmann equation for trapped fermions in the normal phase using the test-particle method. After discussing a couple of tests in order to estimate the reliability of the method, we apply it to the description of collective modes in a spherical harmonic trap. The numerical results are compared with those obtained previously by taking moments of the Boltzmann equation. We find that the general shape of the response function is very similar in both methods, but the relaxation time obtained from the simulation is significantly longer than that predicted by the method of moments. It is shown that the result of the method of moments can be corrected by including fourth-order moments in addition to the usual second-order ones and that this method agrees very well with our numerical simulations.Comment: 13 pages, 8 figures, accepted for publication in Phys. Rev.

The iconography of Asphyxiophilia: From fantasmatic fetish to forensic fact

This is a post print version of the article. The official published version can be accessed from the link below

Pengaruh Motivasi Berprestasi Dan Konsep Diri Akademik Terhadap Prestasi Akademik Siswa SMP Negeri Se-kota Malang

Academic achievement is starting point for the students to succeed in learning. There are two factors that contribute to succeed of the students' academic achievement such as achievement motivation and academic self-concept, both factors are non-cognitive factor that affect on students' academic achievement. This research aimed to examine the effect of achievement motivation and academic self-concept on academic achievement of students of all the Junior High School in Malang city. Path analysis method been used to analyze the data that been collected from 393 samples. Result of the research shown that there were positive and significant directly and indirectly influenced between academic self-concept and achievement motivation on academic achievement.Prestasi akademik merupakan tolak ukur keberhasilan siswa dalam belajar. Terdapat dua faktor yang berkontribusi dalam keberhasilan siswa mencapai prestasi akademik, yaitu motivasi berprestasi dan konsep diri akademik, keduanya merupakan faktor non-kognitif yang berpengaruh terhadap prestasi akademik siswa. Penelitian ini bertujuan untuk menguji pengaruh motivasi berprestasi dan konsep diri akademik terhadap prestasi akademik siswa SMPN se-Kota Malang. Metode analisis jalur digunakan untuk menganalisis data yang dikumpulkan dari 393 sampel. Hasil penelitian ini menunjukkan terdapat pengaruh positif dan signifikan secara langsung dan tidak langsung antara konsep diri akademik dan motivasi berprestasi terhadap prestasi akademik

Changes in plant growth, leaf relative water content and physiological traits in response to salt stress in peanut (Arachis hypogaea L.) varieties

Salinity is the main environmental factor accountable for decreasing crop productivity worldwide. The effects of NaCl salinity on plant growth (leaf relative water content (RWC), leaf dry weight (LDW), shoot length (SL), number of leaves (NL), number of branches (NB) and total leaf area (TLA) and physiological characteristics (stomatal conductance (gs), transpiration rate (TR), net photosynthetic (Pn), yield of photosystem II (OPsII) and the intercellular CO2 concentration (CO2int) in peanut (Arachis hypogaea L.) varieties (‘Vanda', ‘P244601' and ‘Pl184948', widely used in Cameroon, Tanzania and Ghana, respectively, were investigated under hydroponic condition. Plants were subjected to four levels of NaCl (0, 40, 80 and 120 mM) at early seedling growth stage of plant development. Application of NaCl treatment led to a significant decrease in LDW, SL, NL, TLA, Pn, gs, TR and CO2int concentration of ‘Vanda' and ‘P244601' compared to untreated plants while the plant growth inhibition was notably noted at 120 mM NaCl in ‘P1184948' for LDW, SL and NB. The highest depressive effect was detected in gs of salt-sensitive ‘Vanda' while the lowest were recorded in gs of salt-tolerant ‘P1184948' at high salinity level. Enhanced NaCl concentrations led to a significant increase in OPSII of ‘P1184948' compared to ‘Vanda', ‘P244601' and untreated plants. Leaf CHL content was significantly increased in moderately-tolerant ‘‘P244601' and salt-tolerant ‘P1184948' at 80 mM NaCl compared to salt sensitive ‘Vanda' and untreated plants. The depressive effect of salt on RWC was recorded at 120 mM NaCl in peanut leaves of all varieties. Under salt stress ‘P1184948‘ was observed to have relatively higher tolerance on average of all growth and physiological traits than ‘Vanda’ and P244601' suggesting that it could be grown in salt-affected soils

Perguntamos: qual o diagnóstico?

Centro de Medicina Diagnóstica FleuryUniversidade Federal de São Paulo (UNIFESP)University of British ColumbiaUNIFESPSciEL

Novel Approaches to Coronary Perforations: Everything But the Kitchen Sink.

[Figure: see text