Elastic and Chemical Contributions to the Stability of Magnetic Surface Alloys on Ru(0001)

We have used density functional theory to study the structural stability of surface alloys. Our systems consist of a single pseudomorphic layer of $M_xN_{1-x}$ on the Ru(0001) surface, where $M$ = Fe or Co, and $N$ = Pt, Au, Ag, Cd, or Pb. Several of the combinations studied by us display a preference for atomically mixed configurations over phase-segregated forms. We have also performed further {\it ab initio} calculations to obtain the parameters describing the elastic interactions between atoms in the alloy layer, including the effective atomic sizes at the surface. We find that while elastic interactions favor alloying for all the systems considered by us, in some cases chemical interactions disfavor atomic mixing. We show that a simple criterion (analogous to the Hume-Rothery first law for bulk alloys) need not necessarily work for strain-stabilized surface alloys, because of the presence of additional elastic contributions to the alloy heat of formation, that will tend to oppose phase segregation.Comment: 10 pages, 8 figures Submitted To Phys. Rev.

A Critical Review of Yang and Plakans' Strategy Inventory for Integrated Writing

This article reviews Yang and Plakans' (2012) Strategy Inventory for Integrated Writing (SIIW). The existence of SIIW is crucial to elicit strategies used by TOEFL iBT test takers in completing integrated reading-listening-writing task. After reviewing Yang and Plakans' SIIW, it is found that there is a need to develop a more comprehensive, reliable and valid strategy inventory for integrated writing

Influence of spatial resolution on diurnal variability during the north American monsoon

Diurnal variability is an important yet poorly understood aspect of the warm-season precipitation regime over southwestern North America. In an effort to improve its understanding, diurnal variability is investigated numerically using the fifth-generation Pennsylvania State University (PSU)-NCAR Mesoscale Model (MM5). The goal herein is to determine the possible influence of spatial resolution on the diurnal cycle. The model is initialized every 48 h using the operational NCEP Eta Model 212 grid (40 km) model analysis. Model simulations are carried out at horizontal resolutions of both 9 and 3 km. Overall, the model reproduces the basic features of the diurnal cycle of rainfall over the core monsoon region of northwestern Mexico and the southwestern United States. In particular, the model captures the diurnal amplitude and phase, with heavier rainfall at high elevations along the Sierra Madre Occidental in the early-afternoon that shifts to lower elevations along the west slopes in the evening. A comparison to observations (gauge and radar data) shows that the high-resolution (3 km) model generates better rainfall distributions on time scales from monthly to hourly than the coarse-resolution (9 km) model, especially along the west slopes of the Sierra Madre Occidental. The model has difficulty with nighttime rainfall along the slopes, over the Gulf of California, and over Arizona. A comparison of surface wind data from three NCAR Integrated Sounding System (ISS) stations and the Quick Scatterometer (QuikSCAT) to the model reveals a low bias in the strength of the Gulf of California low-level jet, even at high resolution. The model results indicate that outflow from convection over northwestern Mexico can modulate the low-level jet, though the extent to which these relationships occur in nature was not investigated. © 2008 American Meteorological Society

HUBUNGAN PENERAPAN CORPORATE GOVERNANCE DAN SOCIAL CORPORATE TERHADAP MANAJEMEN PAJAK (Studi Empiris Pada Perusahaan Manufaktur Yang Terdaftar di Bursa Efek Indonesia Tahun 2012-2015)

This study aims to examine the effect of the number of boards of commissioners, the percentage of independent commissioners, the amount of compensation board of commissioners, audit committee, and Corporate Social Responsibility to corporate tax management This study used multiple linear regression analysis using SPSS. The population used in this study consists of manufacturing companies listed in Indonesia Stock Exchange for the period 2012-2015. Samples were obtained in this study as many as 30 companies, bringing the total overall sample to be observed during the years 2012 to 2015 a total of 120. The results show that there is a significant positive effect on the number of commissioners tax management. There is a significant positive effect on the percentage of independent board tax management. There is a significant positive effect on the amount of compensation commissioners tax management. There is no influence of the audit committee of the tax management. There is no influence of Corporate Social Responsibility for the management of taxes. There is no effect of firm size on tax management. There is a significant positive effect on the profitability of tax management

Inertia and chiral edge modes of a skyrmion magnetic bubble

The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic textures with a nonzero skyrmion number. However, recent numerical simulations revealed that skyrmion magnetic bubbles show significant deviations from this model. We show that a skyrmion bubble possesses inertia and derive its mass from the standard theory of a thin-film ferromagnet. Besides center-of-mass motion, other low energy modes are waves on the edge of the bubble traveling with different speeds in opposite directions.Comment: updated simulation detail

Pengaruh Pupuk Cair Limbah Biogas pada Tanaman Selada (Lactuca Sativa L)

This study aims to determine the dosage of biogas waste liquid fertilizer that produces growth and yield of lettuce (Lactuca sativa L) best. The research was conducted in Experimental Field of Faculty of Agriculture, University of Riau. The soil type used is Inceptisol. The study was conducted for three months starting from May to July 2016. The experiment was conducted experiments using Completely Randomized Design (RAL), which consisted of 6 treatments and 4 replications. The total experimental unit was 24 plots, with each plot contained 9 plants. Each plot was taken 3 randomly sampled plants. The observational data were analyzed statistically using Analysis of Varian (ANOVA), and Duncan Multiple Range Test at the 5 % level. The observed parameters consist of plant height, leaf number, fresh weight of plant, fresh weight of plant worth consumption and dry weight of the plant. The results showed that the treatment of biogas waste liquid fertilizer can increase the height of the plant, the number of leaves, the fresh weight of the plant / plot, the fresh weight of the plant is feasible consumption / plot and dry weight. The best treatment for lettuce production was the application of liquid biogas waste fertilizer with a dose of 3.5 liters / plot

Coral Recruitment on Reef Balltm Modules at the Benete Bay, Sumbawa Island, Indonesia

Reef BallTM structure is a popular artificial reef module that has been invested in many countries. Publication on its efficacy in promoting coral recruitment however remains lack of study or publication. This present study was aimed to examine the pattern of coral recruitment on reef ball structure at the Benete Bay of Sumbawa Island, Indonesia. Thirty reef-balls (dome shape; 0.90 cm height, 1.20 cm diameter) were monitored after three years of deployment. The results of this study showed that nearly all coral colonies grew on the outer vertical surface and upper side of the reef balls. The recruit number varied a lot between 1-76 colonies per module. Most recruits were belonged to the Family Acroporidae, which contributed approximately 76 percent to the whole recruitment (640 colonies). Branching acroporiid was the most abundant colonies (55%). Pocilloporidae and Faviidae both contributed approximately nine percent to the total recruitment, while Poritidae contributed about three percent. Other coral families only had <1% contribution. The diameter of coral colonies which were growing on the reef balls varied between 5-290 mm. The number of recruit on the ball was very low at 10 meter depth (1-5 colonies per ball) that was likely to be affected by sedimentation. This study showed that reef ball module can be effectively used as a method in rehabilitating damaged coral reefs, and developing a proto-reef

Pengaruh Kinerja Keuangan terhadap Nilai Perusahaan dengan Corporate Social Responsibility dan Good Corporate Governance sebagai Variabel Pemoderasi (Studi pada Perusahan Manufaktur yang Terdaftar di Bursa Efek Indonesia Periode 2010-2014)

This research aims to excamine the influence of financial performance on firm value with corporate social responsibility and good corporate responsibility as moderating variable. The object on his research is manufacturing companies was listed in Indonesian Stock Exchange in 2010-2014. This research used purposive sampling, and getting 21 companies with 130 observed data. The data analysis was conducted by using multiple regresion analysis.The results after analysis is financial performance (with ROA proxy) has not influence to firm value, financial performance with corporate social responsibility as moderating variable has positive influence to firm value. Meanwhile financial performance with good corporate responsibility (with management ownership proxy) as moderating variable has not influence to firm value

Kajian Kerentanan Sosial dan Ekonomi terhadap Bencana Banjir (Studi Kasus: Wilayah Pesisir Kota Pekalongan)

Penelitian ini diangkat dari latar belakang kondisi sosial dan ekonomi masyarakat yang rentan terhadap bencana banjir di wilayah pesisir Kota Pekalongan. Tujuan dari penelitian ini adalah untuk mengkaji kerentanan sosial dan ekonomi masyarakat melalui pemodelan untuk mengetahui tingkat kerentanan masyarakat dengan bantuan alat Sistem Informasi Geografis.Penelitian ini menggunakan pendekatan analisis kuantitatif dengan metode analisis data berupa scoring analysis, deskriptif kuantitatif dan analisis spasial.Kerentanan sosial yang merupakan kajian dalam penelitian ini diukur dengan kepadatan penduduk, penduduk usia tua dan Balita, penduduk wanita dan pemahaman masyarakat terhadap bencana. Sedangkan kerentanan ekonomi diukur dari persentase tingkat kemiskinan.Dari hasil penelitian, 272,9 ha wilayah pesisir Kota Pekalongan atau sekitar 6% dari luas total Kota Pekalongan tergenang air laut pada tahun 2029. Tingkat kerentanan sosial dan ekonomi masyarakat di wilayah pesisir Kota Pekalongan terkategorikan kedalam tiga kelas yaitu kerentanan rendah (1 kelurahan), kerentanan sedang (4 kelurahan) dan kerentanan tinggi (1 kelurahan). Kesimpulan yang dapat diambil adalah model terbentuk dan dapat mempresentasikan kondisi sebenarnya di lapangan sebesar 83,34%

Hubungan Penerapan Corporate Governance dan Social Corporate terhadap Manajemen Pajak (Studi Empiris pada Perusahaan Manufaktur yang Terdaftar di Bursa Efek Indonesia Tahun 2012-2015)

This study aims to examine the effect of the number of boards of commissioners, the percentage of independent commissioners, the amount of compensation board of commissioners, audit committee, and Corporate Social Responsibility to corporate tax management. This study used multiple linear regression analysis using SPSS. The population used in this study consists of manufacturing companies listed in Indonesia Stock Exchange for the period 2012-2015. Samples were obtained in this study as many as 30 companies, bringing the total overall sample to be observed during the years 2012 to 2015 a total of 120. The results show that there is a significant positive effect on the number of commissioners tax management. There is a significant positive effect on the percentage of independent board tax management. There is a significant positive effect on the amount of compensation commissioners tax management. There is no influence of the audit committee of the tax management. There is no influence of Corporate Social Responsibility for the management of taxes. There is no effect of firm size on tax management. There is a significant positive effect on the profitability of tax management