Grad’s Moment Equations for Binary Hard Sphere Gas-Mixtures

This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute, ASME Press, LCN London Centre for Nanotechnology, UCL University College London, UCL Engineering, the International NanoScience Community, www.nanopaprika.eu.The derivation of non-linear Grad’s 2×26-moment (2×G26) equations for a binary gasmixture of monatomic-inert-ideal hard sphere gases is sketched, although—for conciseness—only the linear 2×G26 equations are illustrated and analysed. The linear stability analysis is performed on 2×G26 equations by studying the dispersion relation and by considering the plane wave solution, it is shown that the 2×G26 equations for binary hard sphere gas-mixture are linearly stable

Implikasi Yuridis Legalitas Kewenangan (Rechtmatigheid) Majelis Kehormatan dalam Pembinaan Notaris sebagai Pejabat Publik

Diundangkannya UU Perubahan Atas Undang-Undang No.30 Tahun 2004 yaitu Undang Undang No.2 Tahun 2014, memunculkan lembaga baru yang disebut Majelis Kehormatan Notaris yang mempunyai tugas melaksanakan pembinaan sebagaiman diatur dalam Pasal 66A ayat (1).Disisi lain berdasarkan Pasal 1 angka (6) mengenai Majelis Pengawas Notaris disebutkan mempunyai kewenangan dan kewajiban untuk melaksanakan pembinaan dan pengawasan terhadap Notaris. Implikasi yuridis yang terjadi adalah adanya pertentangan norma antara ketentuan yang diatur dalam ketentuan Pasal 1 Angka (6), Pasal 66A dan pasal 67Undang-Undang No.2 Tahun 2014 tentang Perubahan atas Undang-Undang No.30 Tahun 2004. Dengan metode penelitian hukum normatif dengan pendekatanperundang-undangan (Statue Approach) dan Pendekatan Analisis Konsep Hukum (Analitical Conceptual Approach), penulis akan menganalisa ruang lingkup kewenangan keberadaan Majelis Pengawas Notaris dan Majelis Pengawas Notaris serta legalitas kewenangan fungsi Majelis Kehormatan Notaris dalam lembaga notariat sehingga tidak terjadi pertentangan kewenangan diantara kedua lembaga notariat tersebut

From the Heart of The Ghoul: C and N Abundances in the Corona of Algol B

Chandra Low Energy Transmission Grating Spectrograph observations of Algol have been used to determine the abundances of C and N in the secondary star for the first time. The analysis was performed relative to similar observations of an adopted "standard" star HR 1099. It is demonstrated that HR 1099 and Algol are coronal twins in many respects and that their X-ray spectra are very similar in nearly all details, except for the observed strengths of C and N lines. The H-like transitions of C and N in the coronae of Algol and HR 1099 demonstrate that the surface abundances of Algol B have been strongly modified by CN-processing, as shown earlier by Schmitt & Ness (2002). It is found that N is enhanced in Algol B by a factor of 3 compared to HR 1099. No C lines are detected in the Algol spectrum, indicating a C depletion relative to HR 1099 by a factor of 10 or more. These C and N abundances indicate that Algol B must have lost at least half of its initial mass, and are consistent with predictions of evolutionary models that include non-conservative mass transfer and angular momentum loss through magnetic activity. Little or no dredge-up of material subjected to CN-processing has occurred on the subgiant component of HR 1099. It is concluded that Fe is very likely depleted in the coronae of both Algol and HR 1099 relative to their photospheres by 0.5 dex, and C, N and O by 0.3 dex. Instead, Ne is enhanced by up to 0.5 dex.Comment: 17 pages, 4 figures, ApJ accepte

X-ray Evidence of the Common Envelope Phase of V471 Tauri

Chandra Low Energy Transmission Grating Spectrograph observations of the pre-cataclysmic binary V471 Tau have been used to estimate the C/N abundance ratio of the K dwarf component for the first time. While the white dwarf component dominates the spectrum longward of 50 AA, at shorter wavelengths the observed X-ray emission is entirely due to coronal emission from the K dwarf. The H-like resonance lines of C and N yield an estimate of their logarithmic abundance ratio relative to the Sun of [C/N]=-0.38+/-0.15 - half of the currently accepted solar value. We interpret this result as the first clear observational evidence for the presumed common envelope phase of this system, during which the surface of the K dwarf was contaminated by CN-cycle processed material dredged up into the red giant envelope. We use the measured C/N ratio to deduce that 0.015-0.04 Msun was accreted by the K dwarf while engulfed, and show that this is consistent with a recent tentative detection of 13C in the K dwarf photosphere, and with the measured Li abundance in the scenario where the red giant companion was Li-rich during the common envelope phase.Comment: 6 pages, 2 figures, ApJL accepte

Perceived stigma among patients receiving antiretroviral treatment: A prospective randomised trial comparing an m-DOT strategy with standardof- care in Kenya

HIV and AIDS remain highly stigmatised. Modified directly observed therapy (m-DOT) supports antiretroviral treatment (ART) adherence but little is known about its association with perceived stigma in resource-constrained settings. In 2003, 234 HIV-infected adults enrolled in a two-arm randomised trial comparing a health centre-based m-DOT strategy with standard self-administration of ART. Data on perceived stigma were collected using Berger’s HIV stigma scale prior to starting ART and after 12 months. Thiswas a secondary analysis to examine whether perceived stigma was related to treatment delivery. Perceived stigma scores declined after 12 months of treatment from a mean of 44.9 (sd=7.6) to a mean of 41.4 (sd=7.7), (t=6.14,