Fast convergence to equilibrium for long-chain polymer melts using a MD/continuum hybrid method

Effective and fast convergence toward an equilibrium state for long-chain polymer melts is realized by a hybrid method coupling molecular dynamics and the elastic continuum. The required simulation time to achieve the equilibrium state is reduced drastically compared with conventional equilibration methods. The polymers move on a wide range of the energy landscape due to large-scale fluctuation generated by the elastic continuum. A variety of chain structures is generated in the polymer melt which results in the fast convergence to the equilibrium state.Comment: 13 page

Asuhan Kebidanan Berkelanjutan Pada Ny. E. W Di Puskesmas Kapan Kabupaten TTS Periode 24 April–14 Juni 2019

Latar Belakang: Data yang diperolehdari Dinkes Kota Kupang pada tahun 2017, AKI di Kota Kupang, Untuk tahun 2017 Angka Kematian Ibu dari data yang dikumpulkan Bidang Kesehatan Keluarga terdapat 4 kasus dari 8.101 kelahiran hidup dengan Angka Kematian Ibu 2017 yang dilaporkan sebesar 49 kematian per 100.000 kelahiran hidup. Adapun rincian penyebab Kematian Ibu sebagai berikut 2 kasus disebabkan oleh perdarahan dan 1 kasus kematian karena cardiac acut 1 kasuskarenasepsis. Angka Kematian Bayi (AKB) di Kota Kupang pada tahun 2017 sebesar 4,57 per 1.000 kelahiran hidup.Data yang penulis peroleh di Puskesmas Kapan pada tahun 2017, menunujukan tidak ada kematian ibu dan bayi.Oleh karena itu, salah satu upaya penurunan AKI dan AKB adalah dengan dilakukannya asuhan kebidanan berkelanjutan. Tujuan: Mampu melakukan asuhan kebidanan berkelanjutan pada Ny.E.W di Puskesmas Kapan periode 24 april sampai 14juni 2019, dengan menggunakan metode pendokumentasian 7 langkah Varney pada pengkajian awal dan selanjutnya menggunakan metode pendokumentasian SOAP pada catatan perkembangan. Metode Penelitian: Dalam penelitian ini, penulis menggunakan metode kualitatif dengan pedekatan studi kasus, yang dilaksanakan pada Ny.E.W di Puskesmas Kapan, teknik pengumpulan data terdiri dari data primer dan data sekunder. Hasil Penelitian: Selama penulismemberikan asuhan kebidanan berkelanjutan, ibu tidak mengalami penyulit apapun. Kesimpulan: Setelah melakukan asuhan kebidanan berkelanjutan pada ibu dari masa kehamilan sampai bersalin, ibu dan bayi dalam kondisi yang sehat dan ibu mau menerima dan mengikuti anjuran yang diberikan

Decaying Sterile Neutrinos as a Heating Source in the Milky Way Center

Recent Chandra and Newton observations indicate that there are two-temperature components ($T \sim$ 8 keV, 0.8 keV) of the diffuse x-rays emitted from deep inside the center of Milky Way. We show that this can be explained by the existence of sterile neutrinos, which decay to emit photons that can be bound-free absorbed by the isothermal hot gas particles in the center of Milky Way. This model can account for the two-temperature components naturally as well as the energy needed to maintain the $\sim$ 8 keV temperature in the hot gas. The predicted sterile neutrino mass is between 16-18 keV.Comment: Accepted by MNRAS with minor correction

T2 relaxation times of the retrodiscal tissue in patients with temporomandibular joint disorders and in healthy volunteers: A comparative study

Objective. The aims of this study were to compare the temporomandibular joint (TMJ) retrodiscal tissue T2 relaxation times between patients with temporomandibular disorders (TMDs) and asymptomatic volunteers and to assess the diagnostic potential of this approach. Study Design. Patients with TMD (n = 173) and asymptomatic volunteers (n = 17) were examined by using a 1.5-T magnetic resonance scanner. The imaging protocol consisted of oblique sagittal, T2-weighted, 8-echo fast spin echo sequences in the closed mouth position. Retrodiscal tissue T2 relaxation times were obtained. Additionally, disc location and reduction, disc configuration, joint effusion, osteoarthritis, and bone edema or osteonecrosis were classified using MRI scans. The T2 relaxation times of each group were statistically compared. Results. Retrodiscal tissue T2 relaxation times were significantly longer in patient groups than in asymptomatic volunteers (P < .01). T2 relaxation times were significantly longer in all of the morphologic categories. The most important variables affecting retrodiscal tissue T2 relaxation times were disc configuration, joint effusion, and osteoarthritis. Conclusion. Retrodiscal tissue T2 relaxation times of patients with TMD were significantly longer than those of healthy volunteers. This finding may lead to the development of a diagnostic marker to aid in the early detection of TMDs

Unusual diffuse X-ray source in the Galactic center region

We report the ASCA and Chandra discovery of a diffuse X-ray source in the Galactic center region. The X-ray spectrum is fitted with a non-equilibrium ionization (NEI) plasma model of about 6-keV temperature. The model requires higher than solar metal abundances, a young plasma age of $\simeq$ 100 years and a large N_H value of about 10^{23} cm^{-2}. The N_H value constrains the source position to be in the Galactic center region at about 8.5 kpc distance. The high resolution X-ray image with the Chandra ACIS shows a ring of 10'' radius which corresponds to 0.4 pc at the Galactic center, and a tail-like structure. Although the morphology is peculiar, the other X-ray features are likely to be a very young supernova remnant, possibly in a free expansion phase.Comment: 11 pages, 4 figures, to be published in Ap

SEARCH FOR NEW SNR CANDIDATES IN THE GALACTIC CEN- TER REGION WITH CHANDRA

Abstract We report the diffuse X-ray features which are possible SNR candidates near the Galactic Center (GC) observed with Chandra. G0.570−0.018 has a extremely small (20 diameter) shelllike morphology. The X-ray spectrum exhibits a strong Fe-K line emission and is well fitted by NEI model with a temperature of about 6 keV. These features suggest that G0.570−0.018 is a quite young (t ∼ 100 year) SNR. Diffuse hard X-ray were also detected from G359.92−0.09. The X-ray spectrum exhibits strong Fe-K line emission. The X-ray excess coincides with the shell-type feature observed with radio continuum (e.g

Detailed analysis of the ANO-2 turbine trip test

A RELAP5/MOD1 (Cycle 18) computer code simulation of the ANO-2 turbine trip test from 98% power level was performed for use in vendor code qualification studies. Results focused on potential improvements to simulation capabilities and plant data acquisition systems to provide meaningful comparisons between the calculations and the test data. The turbine trip test was selected because it resulted in an unplanned sequence of events that broadly affected the plant process systems and their controls. The pressurizer spray valve stuck open at an undetermined flow area, and an atmospheric dump valve remained stuck fully open while several atmospheric dump and secondary side safety valves were unavailable throughout. Thus, although the plant remained always in a safe condition, this transient potentially provided an unusual set of data against which the fidelity of a NSSS simulation by RELAP5/MOD1 along with certain vendor analysis codes might be judged

Structure of liquid Sn over a wide temperature range from neutron scattering experiments and first-principles MD simulation: A comparison to liquid Pb

金沢大学理学部The structure of liquid Sn was studied by neutron scattering experiments in the widest temperature range that was ever performed. Though, on increasing temperature, the existence of the shoulder in the structure factor, S(Q), becomes less clear in the change of the overall shape of the S(Q), the structure related to this shoulder seems to be present even at 1873 K. The first-principle molecular-dynamics ~FPMD! simulation was performed for the first time for liquid Sn by using the cell size of 64 particles. The calculated results well reproduced S(Q) obtained by the neutron experiments. The angle distribution, g(3)(u ,rc), was evaluated for the angle between vectors from centered atom to other two atoms in spheres of cutoff radii rc’s. The g(3)(u ,rc) shows that, with the decrease of rc from 0.4 to 0.3 nm, a rather sharp peak around 60 ° disappears and only a broad peak around 100 ° remains; the former peak may be derived from the feature of the closely packed structures and the latter one is close to the tetrahedral angle of 109 °. In addition, the coordination number, n, of liquid Sn counted within the sphere of rc50.3 nm is found to be 2–3 and does not change with the increase of temperature even up to 1873 K. These facts indicate that at least the fragment of the tetrahedral unit may be essentially kept even at 1873 K for liquid Sn. For comparison, the FPMD simulation was performed for the first time also for liquid Pb. No sign of the existence of the tetrahedral structure was observed for liquid Pb. Unfortunately, the self-diffusion coefficients, D’s, obtained from this FPMD for liquid Sn do not agree with those obtained by the microgravity experiments though the structure factors, S(Q)’s, are well reproduced. To remove the limitation of the small cell size of the FPMD, the classical molecular-dynamics simulations with a cell size of 2197 particles were performed by incorporating the present experimental structural information of liquid Sn. Obtained D’s are in good agreement with the microgravity data

Are there “women’s crops”? A new tool for gender and agriculture

A “Gender Control Tool” was developed to measure women’s control over decision-making for agricultural production, sales, and use of income. The tool was tested for groundnuts in Eastern Province, Zambia, where mechanisation has increased male participation in groundnut shelling, and for goats in Gwanda district, Zimbabwe, where the introduction of auctions has increased investment and sales. A mixed methods approach was used, that involved focus group discussions (FGDs) and a quantitative household survey. This article compares the results obtained from these two methods and discusses the strengths and weaknesses of the tool in understanding how commercialisation affects women’s control