Stark Broadening of in III Lines in Astrophysical and Laboratory Plasma

Besides the need of Stark broadening parameters for a number of problems in physics, and plasma technology, in hot star atmospheres the conditions exist where Stark widths are comparable and even larger than the thermal Doppler widths. Using the semiclassical perturbation method we investigated here the influence of collisions with charged particles for In III spectral lines. We determined a number of Stark broadening parameters important for the investigation of plasmas in the atmospheres of A-type stars and white dwarfs. Also, we have compared the obtained results with existing experimental data. The results will be included in the STARK-B database, the Virtual Atomic and Molecular Data Center and the Serbian Virtual Observatory

Communicating medication risk to cardiovascular patients in Qatar

Purpose: Patient safety is gaining prominence in health professional curricula. Patient safety must be complemented by teaching and skill development in practice settings. The purpose of this paper is to explore how experienced pharmacists identify, prioritize and communicate adverse drug effects to patients. Design/methodology/approach: A focus group discussion was conducted with cardiology pharmacy specialists working in a Doha hospital, Qatar. The topic guide sought to explore participants? views, experiences and approaches to educating patients regarding specific cardiovascular therapy safety and tolerability. Discussions were audio-recorded and transcribed verbatim. Data were coded and organized around identified themes and sub-themes. Working theories were developed by the three authors based on relevant topic characteristics associated with the means in which pharmacists prioritize and choose adverse effect information to communicate to patients. Findings: Nine pharmacists participated in the discussion. The specific adverse effects prioritized were consistent with the reported highest prevalence. Concepts and connections to three main themes described how pharmacists further tailored patient counseling: potential adverse effects and their perceived importance; patient encounter; and cultural factors. Pharmacists relied on initial patient dialogue to judge an individual?s needs and capabilities to digest safety information, and drew heavily upon experience with other counseling encounters to further prioritize this information, processes dependent upon development and accessing exemplar cases. Originality/value: The findings underscore practical experience as a critical instructional element of undergraduate health professional patient safety curricula and for developing associated clinical reasoning. ? 2018, Kerry Wilbur, Arwa Sahal and Dina Elgaily.Scopu

Penerapan Strategi Pembelajaran Aktif Rolled untuk Meningkatkan Motivasi Belajar Siswa IPA Fisika Kelas VII SMPN 40 Pekanbaru

Abstrack: This research aimed to describe and find out the improvement of the students\u27 motivation learning achievement by using learning active strategy of Rolled. Type of this research is a quasi-experimental, with nonequivalent control group design. The subject of this research is students class VII at SMPN 40 Pekanbaru, total of 176 students as divide into two class, experimental class and control class. The data in this research is a score of motivation before and after learning physics by implementation of learning active strategy of rolled model with descriptive and inferential analysis.Then, measured the improvement of the students\u27 motivation by normalized gain (gain-N) and t-test. The descriptive analysis score motivation of students at experimental class in middle category and increase in the middle category with N-Gain 0.49, and the control class in the middle category with N-Gain 0,37. This proved by inferential analysis, the analyzed shows t(44) = 7.409 means p < 0.05, then Ho is rejected. Which means that there are difference in motivation of learning between experiment class and control class. It can therefore be concluded that the implementation of learning active strategy of rolled to students\u27 motivation learning achievement in physics on science at the seven grade of junior high school 40 pekanbar

Atomic data and electron-impact broadening effect in DO white dwarf atmospheres: Si VI

Energy levels, electric dipole transition probabilities and oscillator strengths in five times ionized silicon have been calculated in intermediate coupling. The present calculations were carried out with the general purpose atomic-structure program SUPERSTRUCTURE. The relativistic corrections to the non-relativistic Hamiltonian are taken into account through the Breit-Pauli approximation. We have also introduced a semi-empirical correction (TEC) for the calculation of the energy-levels. These atomic data are used to provide semiclassical electron-, proton- and ionized helium- impact line widths and shifts for 15 Si VI muliplet. Calculated results have been used to consider the influence of Stark broadening for DO white dwarf atmospheric conditions.Comment: MNRAS, accepted, 14 page

Tingkat Keterlaksanaan Pendekatan Saintifik pada Mata Pelajaran IPA Berbasis Kurikulum 2013 Menurut Persepsi Siswa Kelas IX SMP Negeri Pekanbaru

This research aims to describe the level of implementation scientific approach in science based on Curriculum 2013 according to the perception of 9th grade student of SMP Negeri Pekanbaru. The research use survey method. The population is students of 9th grade SMP Negeri Pekanbaru, namely: SMPN 1 Pekanbaru, SMPN 6 Pekanbaru, and SMPN 23 Pekanbaru the totally is 771 students. The sample use Slovin with the error level is 5% of the population, while the sample is 263 students. The results of research the level of implementation scientific approach in science based on Curriculum 2013 according to the perception of 9th grade student of SMP Negeri Pekanbaru the score is 2.73 in the category quite well. It can be concluded that the application of the scientific approach to the learning process at schools with the maximum has not been done. It is caused by several factors, namely: the limited time, limited infrastructure such as infocus in the classroom, the teacher is less a creative learning

Hasil Belajar Kognitif IPA Fisika melalui Penerapan Strategi Index Card Match pada Materi Kalor di Kelas Vii4 SMPN 20 Pekanbaru

Penelitian ini bertujuan untuk mendeskripsikan hasil belajar kognitif IPA Fisika melalui penerapan strategi Index Card Match Pada Materi Kalor di Kelas VII4 SMPN 20 Pekanbaru. Subjek penelitian ini adalah siswa kelas VII4 sebanyak 38 orang yang terdiri dari 14 siswa laki-laki dan 24 siswa perempuan. Instrumen pengumpulan data dalam penelitian ini adalah tes hasil belajar kognitif yang terdiri dari 20 butir soal pilihan ganda. Analisis data dalam penelitian ini adalah analisis deskriptif untuk melihat gambaran dari hasil belajar kognitif IPA Fisika dengan menggunakan kriteria daya serap, efektivitas pembelajaran, dan ketuntasan belajar siswa. Dari hasil analisis data menunjukkan: daya serap rata-rata kelas adalah 85,78% dengan kategori amat baik, efektivitas pembelajaran dinyatakan sangat efektif, ketuntasan belajar siswa secara klasikal bernilai 94,73% dan dinyatakan tuntas, serta ketuntasan materi pelajaran sebesar 80,00% yang dinyatakan tuntas. Dengan demikian, dapat disimpulkan bahwa penerapan strategi Index Card Match dapat dijadikan sebagai alternative dalam proses pembelajaran di kelas VII4 SMPN 20 Pekanbaru

Etude des propriétés physiques des couches minces de ZnO dopées Al,préparées par la méthode de « sol-gel » associée au « spin coating »

Studies of physical properties of the Al doped ZnO thin films prepared by sol-gel method associated with spin coating.In this work, thin films of ZnO intrinsic and doped Al are prepared by sol-gel technique associated with spin-coating onto glass substrates. Zinc acetate dehydrate, ethanol and mono-ethanolamine were used as a starting material, solvent and stabilizer, respectively. The structural, electrical and optical properties of the prepared films were analyzed by X-ray diffraction, transmittance, absorbance spectra and Photoluminescence spectroscopy respectively. All films are polycrystalline with a hexagonal wurtzite-type structure with a preferential orientation according to the direction . The 4-points technique used to characterise electrically. All films exhibit a transmittance above 80-90 % along the visible range up to 650 nm and a sharp absorption on set about 375 nm corresponding to the fundamental absorption edge 3.3 eV. Intense UV photoluminescence is observed for intrinsic ZnO film

The Height of Chromospheric Loops in an Emerging Flux Region

Context. The chromospheric layer observable with the He I 10830 {\AA} triplet is strongly warped. The analysis of the magnetic morphology of this layer therefore requires a reliable technique to determine the height at which the He I absorption takes place. Aims. The He I absorption signature connecting two pores of opposite polarity in an emerging flux region is investigated. This signature is suggestive of a loop system connecting the two pores. We aim to show that limits can be set on the height of this chromospheric loop system. Methods. The increasing anisotropy in the illumination of a thin, magnetic structure intensifies the linear polarization signal observed in the He I triplet with height. This signal is altered by the Hanle effect. We apply an inversion technique incorporating the joint action of the Hanle and Zeeman effects, with the absorption layer height being one of the free parameters. Results. The observed linear polarization signal can be explained only if the loop apex is higher than \approx5 Mm. Best agreement with the observations is achieved for a height of 6.3 Mm. Conclusions. The strength of the linear polarization signal in the loop apex is inconsistent with the assumption of a He I absorption layer at a constant height level. The determined height supports the earlier conclusion that dark He 10830 {\AA} filaments in emerging flux regions trace emerging loops.Comment: 7 pages, 4 figure

Statistical Basis for Predicting Technological Progress

Forecasting technological progress is of great interest to engineers, policy makers, and private investors. Several models have been proposed for predicting technological improvement, but how well do these models perform? An early hypothesis made by Theodore Wright in 1936 is that cost decreases as a power law of cumulative production. An alternative hypothesis is Moore's law, which can be generalized to say that technologies improve exponentially with time. Other alternatives were proposed by Goddard, Sinclair et al., and Nordhaus. These hypotheses have not previously been rigorously tested. Using a new database on the cost and production of 62 different technologies, which is the most expansive of its kind, we test the ability of six different postulated laws to predict future costs. Our approach involves hindcasting and developing a statistical model to rank the performance of the postulated laws. Wright's law produces the best forecasts, but Moore's law is not far behind. We discover a previously unobserved regularity that production tends to increase exponentially. A combination of an exponential decrease in cost and an exponential increase in production would make Moore's law and Wright's law indistinguishable, as originally pointed out by Sahal. We show for the first time that these regularities are observed in data to such a degree that the performance of these two laws is nearly tied. Our results show that technological progress is forecastable, with the square root of the logarithmic error growing linearly with the forecasting horizon at a typical rate of 2.5% per year. These results have implications for theories of technological change, and assessments of candidate technologies and policies for climate change mitigation

Theoretical determination of lifetimes of metastable states in Sc III and Y III

Lifetimes of the first two metastable states in Sc^{2+} and Y^{2+} are determined using the relativistic coupled-cluster theory. There is a considerable interest in studying the electron correlation effects in these ions as though their electronic configurations are similar to the neutral alkali atoms, their structures are very different from the latter. We have made a comparative study of the correlation trends between the above doubly ionized systems with their corresponding neutral and singly ionized iso-electronic systems. The lifetimes of the excited states of these ions are very important in the field of astrophysics, especially for the study of post-main sequence evolution of the cool giant stars.Comment: 13 pages, 1 figure and 5 table