Physical condition and spin-resolved exchange correlation kernels in an inhomogeneous many electron system

We first exploit the spin symmetry relation $f^{\rm xc}_{s\bar s} (\zeta)=f^{\rm xc}_{\bar s s}(-\zeta)$ for the exact exchange correlation kernel $f^{\rm xc}_{s\bar s}(\zeta)$ in an inhomogeneous many electron system with arbitrary spin polarization $\zeta$. The physical condition required to satisfy the specific symmetry relation $f^{\rm xc}_{s\bar s}(\zeta) = f^{\rm xc}_{\bar s s}(\zeta)$ is derived and examined for simple ferromagnetic-nonmagnetic structure by taking the electrochemical potential into account. The condition is then applied to several composite systems useful in spintronics applications such as the magnetic system with net spin polarization.Comment: 5 pages, 1 figur

There is a Crack in Everything—Education and Religion in a Secular Age

There are two constants in academic and theological discourse throughout history, they are the debate around secularization and the dialogue concerning the intersection of religion and education. Each age has had its debate about modernizing forces that drive concerns of impending secularization. In this publication this theme is approached from perspectives of teachers, of students, of policy makers and situated in a politico-historical context. Aware of the fact that in today’s plural societies one sacred canopy is non-existent anymore, cracks of the sacred canopy/canopies are described, as well as ‘the light that gets in’, the possible and challenging ways out are roughly sketched. We expect that each of the contributions of scholars of the East and the West, of the North and the South, and their presented examples and case studies, will stimulate the ongoing exploration and elaboration on the relationship between education and religion in todays’ and the coming world – work-in-progress for coming generations

Targeting determinants of dosage compensation in Drosophila

The dosage compensation complex (DCC) in Drosophila melanogaster is responsible for up-regulating transcription from the single male X chromosome to equal the transcription from the two X chromosomes in females. Visualization of the DCC, a large ribonucleoprotein complex, on male larval polytene chromosomes reveals that the complex binds selectively to many interbands on the X chromosome. The targeting of the DCC is thought to be in part determined by DNA sequences that are enriched on the X. So far, lack of knowledge about DCC binding sites has prevented the identification of sequence determinants. Only three binding sites have been identified to date, but analysis of their DNA sequence did not allow the prediction of further binding sites. We have used chromatin immunoprecipitation to identify a number of new DCC binding fragments and characterized them in vivo by visualizing DCC binding to autosomal insertions of these fragments, and we have demonstrated that they possess a wide range of potential to recruit the DCC. By varying the in vivo concentration of the DCC, we provide evidence that this range of recruitment potential is due to differences in affinity of the complex to these sites. We were also able to establish that DCC binding to ectopic high-affinity sites can allow nearby low-affinity sites to recruit the complex. Using the sequences of the newly identified and previously characterized binding fragments, we have uncovered a number of short sequence motifs, which in combination may contribute to DCC recruitment. Our findings suggest that the DCC is recruited to the X via a number of binding sites of decreasing affinities, and that the presence of high-and moderate-affinity sites on the X may ensure that lower-affinity sites are occupied in a context-dependent manner. Our bioinformatics analysis suggests that DCC binding sites may be composed of variable combinations of degenerate motifs

Flourishing at work is all about relationships

Work as strictly business is an outdated idea: office friendships serve a growing number of functions in our lives, write Amy E. Colbert, Joyce E. Bono and Radostina (Ina) K. Purvanov

Potensi Etnobotani Masyarakat Desa Sekitar Hutan (Studi Kasus di Desa Tamanjaya, Kecamatan Sumur, Kabupaten Pandeglang, Banten)

This study aims to determine the potential of ethnobotany encountered around forest communities. The method used in the study is to survey the field. The activities carried out in this study include: interviews and observation. The data were analyzed descriptively. The results showed that people exploit the potential of ethnobotany of the potency of plants around the forest park and used by the community as much as 72 species of 45 families and can be divided into eleven groups of uses, namely medicinal plants (32 types), decorative (1 species), aromatics ( 6 types), food (23 types), fodder (2 types), pesticide plant (3 types), dye (2 types), firewood (5 types), ceremonies (2 types), building materials (4 types) and material straps, webbing and crafts (4 types)

Estimasi Kadar Iodium dalam Urin 24 Jam melalui Urin Sesaat

Kecukupan asupan iodium individu diukur berdasarkan ekskresi iodium urin (EIU). Metode untuk mengukur kadar iodium urin adalah dengan menampung urin selama 24 jam. Namun, alternatif praktis adalah menggunakan sampel urin sesaat. Makalah ini membahas prakiraan kadar iodium dari sampel urin 24 jam dengan menggunakan urin sesaat. Sebanyak 37 wanita usia subur (18-45 tahun) diukur EIUnya. Sampel urin untuk analisis diperoleh dengan dua cara: (i) urin sesaat yang dikumpulkan setiap buang air kecil; dan (ii) urin 24 jam. Kadar iodium urin ditentukan menggunakan metode ammonium persulphate digestion. Uji statistik t-test dilakukan untuk mengetahui perbedaan antara kadar iodium dari urin sesaat dalam rentang waktu tertentu dengan kadar iodium urin 24 jam. Keeratan hubungan kadar iodium sampel urin sesaat dengan kadar iodium urin 24 diuji dengan korelasi metode Pearson'. Kadar iodium dari sampel urin sesaat pada rentang waktu sebelum jam 12 siang tampak lebih rendah 5,9 - 13,8 persen dibandingkan dengan kadar iodium dari sampel urin 24 jam. Demikian pula kadar iodium urin sesaat antara pukul 12.00 hingga pukul 24.00 tampak lebih tinggi 0,8 - 2,2 persen dibandingkan kadar iodium urin 24 jam. Namun demikian, secara statistik tidak ada perbedaan kadar iodium urin yang diambil dari sampel urin sesaat dengan sampel urin 24 jam. Koefisien korelasi kadar iodium urin sesaat antara pukul 17.00 hingga pukul 24.00 dengan kadar iodium urin 24 jam adalah yang tertinggi yaitu rho 0,82. Kadar iodium berdasarkan urin sesaat dapat digunakan untuk mengukur masukan iodium individu dan dapat digunakan untuk mengestimasi kadar iodium urin 24 jam