Abundance analyses of helium-rich subluminous B stars

The connection between helium-rich hot subdwarfs of spectral types O and B (He-sdB) has been relatively unexplored since the latter were found in significant numbers in the 1980's. In order to explore this connection further, we have analysed the surface composition of six He-sdB stars, including LB 1766, LB 3229, SB 21 (= Ton-S 137 = BPS 29503-0009), BPS 22940-0009, BPS 29496-0010, and BPS 22956-0094. Opacity-sampled line-blanketed model atmospheres have been used to derive atmospheric properties and elemental abundances. All the stars are moderately metal-poor compared with the Sun ([Fe/H] ~ -0.5). Four stars are nitrogen-rich, two of these are carbon-rich, and at least four appear to be neon-rich. The data are insufficient to rule out binarity in any of the sample. The surface composition and locus of the N-rich He-sdBs are currently best explained by the merger of two helium white dwarfs, or possibly by the merger of a helium white dwarf with a post-sdB white dwarf. C-rich He-sdBs require further investigation.Comment: Accepted 2010 July

Modulational instability in binary spin-orbit-coupled Bose-Einstein condensates

We study modulation instability (MI) of flat states in two-component spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) in the framework of coupled Gross-Pitaevskii equations for two components of the pseudospinor wave function. The analysis is performed for equal densities of the components. Effects of the interaction parameters, Rabi coupling, and SOC on the MI are investigated. In particular, the results demonstrate that the SOC strongly alters the commonly known MI (immiscibility) condition, $g_{12} > g_{1} g_{2}$, for the binary superfluid with coefficients $g_{1,2}$ and $g_{12}$ of the intra- and interspecies repulsive interactions. In fact, the binary BEC is always subject to the MI under the action of the SOC, which implies that the ground state of the system is plausibly represented by a striped phase

Prediksi Tingkat Kompetensi Profesional Pendidik Menggunakan Sistem Inferensi Fuzzy Metode Tsukamoto

The competence of a teacher is absolutely necessary to demonstrate the quality of teachers in the exercise of his profession. These competencies will be realized in the form of mastery of the knowledge and professionalism. Professional competence is one of competence as set forth in UUGD 2005 that has several components. In this study applied fuzzy inference system Tsukamoto method to predict the level of teachers's proffesional competence. Expected with this system, the level of professional competence of teachers can be predicted by entering the scores from professional competencies supporting component

Probing the gateway to superheavy nuclei in cranked relativistic Hartree-Bogoliubov theory

The cranked relativistic Hartree+Bogoliubov theory has been applied for a systematic study of the nuclei around 254No, the heaviest nuclei for which detailed spectroscopic data are available. The deformation, rotational response, pairing correlations, quasi-particle and other properties of these nuclei have been studied with different relativistic mean field (RMF) parametrizations. For the first time, the quasi-particle spectra of odd deformed nuclei have been calculated in a fully self-consistent way within the framework of the RMF theory. The energies of the spherical subshells, from which active deformed states of these nuclei emerge, are described with an accuracy better than 0.5 MeV for most of the subshells with the NL1 and NL3 parametrizations. However, for a few subshells the discrepancy reach 0.7-1.0 MeV. The implications of these results for the study of superheavy nuclei are discussed.Comment: 7 pages, 3 figures, Proceedings of the Conference on Frontiers of Nuclear Structure, Berkeley, California, July 29th - August 2nd, 2002, UC Berkeley, Clark Kerr Campus, in pres

Kontroversi Ulama Seputar Kedudukan Al-ziyadah Al-nashsh dan Dampaknya terhadap Fiqh

Dalam lingkup kajian hukum Islam, fenomena perbedaan pendapat (ikhtilaf) di kalangan para ulama adalah lumrah terjadi, baik di kalangan ulama fikih (fuqaha\u27) maupun ulama usu! jikih (ushulqyin). Disinyaalisasi, perbedaan­ perbedaan pendapat di ka!angan ulama itu tidak dipicu oleh salu atau dua latar belakang an sich. Salah salu hal yang memicu munculnya perbedaan pendapat dalam bidangjikih, misalnya, adalah persoalan perbedaan pemahaman (usul fikih) tentang konsep al-Ziyadah \u27ala al-Nashsh.Kontroversi ulama dalam kaidah ini sangat berpengaruh terhadap pemikiran di bidang fikih. Ini dapat diamati dari  keragaman pemikiran fikih para ulama yang  dilatarbelakangi  dari  kaidah  tersebut.           Istilah al-Ziyadah ‘Ala al-Nashsh dalam kqjian disiplin ilmu usul ftkih agaknya, menurut hemat penulis, bukan termasuk terminologi yang mandiri dan sentral. Karena, dalam kitab-kitab usul fikih induk sekalipun, istilah tersebul tidak pemah menempati posisi pembahasan yang mandiri, komprehensif, dan integral. Namun, secara sederhana al-ziyadah \u27ala al-nashsh berarti penambahan atas suatu teks (nash) yang berimplikasi secara hukum. Penambahan tersebut dapat bempa keterkaitan secara substansial (mustaqill), maupun berbeda secara diametral (ghayr al-mustaqill). Penambahan ini dilakukan oleh para ulama berdasarkan indikasi­ indikasi yang mereka tangkap dari berbagai teks.Secara umum penulis menemukan Kenyataan bahwa tampaknya telah terjadi kontroversi yang \u27telanjang\u27 di kalangan ulama mengenai kedudukan al­ ziyadah \u27ala al-nashsh, apakah berfungsi sebagai sebagai naskh atau berada dalam fungsi-fungsi lainnya. Dan, kontroversi ini, harus diakui, telah berimbas dan berpengaruh kuat terhadap hasil ijtihad mereka,yakni dalam wilayah fikih (furu\u27)

Islam Versus Terorisme (Suatu Pendekatan Tafsir Hukum)

Islam Versus Terrorism: A Legal Qur'anic Exegesis Approach. In the last decade, terrorism discourse has become one of the most important International issues. The West has claimed that Islam had supported terrorism and violence against other community, especially the West. This article attempts to elaborate the issue of terrorism in the context of Qur'anic exegesis and Islamic jurisprudence (fiqh). The author argues that Islam as the grace for the whole universe (rahmatan li al ‘âlamîn), in its very doctrines, never support terrorism, radicalism, violent actions, and destructive actions on the earth (fasâd fi al-ardh). This paper attempts to discuss how the Qur'an responses to the issue of terrorism by analyzing the interpretation of legal related verses

Human Rights in Indonesian Constitutional Amendments

Human Rights in Indonesian Constitutional Amendments. Indonesian constitutional amendments incorporated human rights principles into the Constitution of the Republic of Indonesia 1945 (UUD NRI), especially in the second amendment in 2000. Under that amendment, the UUD NRI currently stipulates human rights principles as provided for in the Universal Declaration of Human Rights (UDHR). However, there are some important notes, which at its core is a lack of emphasis on the vision and mission of the State in implementing human rights in Indonesia, as well as the existence of gaps between the norms of the Constitution and the Universal Declaration of Human Rights. Keywords: human rights, the Constitution, the Constitution of Republic of Indonesia, the Universal Declaration of Human RightDOI: 10.15408/jch.v1i1.298