bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of Tensile Properties
Authors: Collins Peter C. , Fraser Hamish L. 
Published: December 2018

AbstractA computational tool would require the contribution of the strengthening mechanisms of metallic material to be predicted and then summed in an appropriate way to derive an estimate of the tensile properties. This article focuses on the modeling of deformation mechanisms pertinent to structural materials, namely, solid-solution strengthening, age/precipitation hardening, dispersion strengthening, grain size reduction, strengthening from cold work, and strengthening from interfaces. It explains the application of predictive models in the atomistic modeling of dislocation structures and cast aluminum property prediction. The article concludes with information on the use of rules-based approaches and data-mining techniques for quantitative predictions of tensile properties.
Computational Analysis of the Vacuum Arc Remelting (VAR) and Electroslag Remelting (ESR) Processes
Authors: Kelkar Kanchan M. , Patankar Suhas V. , Mitchell Alec , Minisandram Ramesh S. , Patel Ashish D. 
Published: December 2018

Abstract
This article provides an overview of the studies on computational modeling of the vacuum arc remelting (VAR) and electroslag remelting (ESR) processes. These models involve the axisymmetric analysis of the electromagnetic, flow, heat-transfer, and phase-change phenomena to predict the pool shape and thermal history of an ingot using two-dimensional axisymmetric models for VAR and ESR. Analysis of segregation of alloying elements during solidification that gives rise to macrolevel compositional nonuniformity in titanium alloy ingots is also described. The article discusses the important features of the control-volume-based computational method to review the unique aspects of the processes. Measurement of the properties of alloys and slags is explained and an analysis of the process variants for improving the predictive accuracy of the models is presented.
CASE BASE REASONING UNTUK MENENTUKAN KEBUTUHAN BAHAN BANGUNAN RUMAH
Authors: Rozaq Abdul 
Published: December 2018

Building materials is an important factor to built a house, to estimate funds the needs of build a house, consumers or developers can estimate the funds needed to build a house. To solve these problems use case base reasoning (CBR) approach, which method is capable of reasoning or solving the problem based on the cases that have been there as a solution to new problems. The system built in this study is a CBR system for determine the needs of house building materials. The consultation process is done by inserting new cases compared to the old case similarity value is then calculated using the nearest neighbor.
The first test by inserting test data then compared with each type of home then obtained an accuracy of 83.6%. The second test is done by K-fold Cross Validation with K = 25 with the number of data 200, the data will be divided into two parts, namely the training data and test data, training data as many as 192 data and test data as many as 8 data. K-Fold Cross Validation method. This CBR system can produce an accuracy of 85.71%
RANCANG BANGUN SISTEM INFORMASI GEOGRAFIS PENGEPUL KOPI BERBASIS ANDROID
Authors: Kendrawan I Dewa Gede Shunu , Khrisne Duman Care , Sukadarmika Gede 
Published: December 2018

The low income of coffe farmers in Indonesia is caused several factor, large production cost, non standart prices and high transport costs. In this paper we try to overcome this problem by establishing a geographic information system for coffe collectors, that will help farmers find an appropriate buyer with minimal shipping costs to maximized their profits. This research has been successfully implemented using Google Maps API for mapping the location and built as an Android based mobile devices application. Application on the side of the collectors can input different types of coffe prices to be purchased. While the system is on the side of farmers can search for coffe collectors location. The test results using the system usability scale (SUS), the respondents gave a score on the farmer’s average of 74.7 and the side of the collector of 71.1 which means it has value adjective rating = excellent, grade scale = c and acceptability ranges = acceptable.
ФОРМУВАННЯ ПРОФЕСІЙНОЇ КОМПЕТЕНТНОСТІ МАЙБУТНІХ БАКАЛАВРІВ ІЗ АГРОІНЖЕНЕРІЇ В УМОВАХ МОДЕРНІЗАЦІЇ ВІТЧИЗНЯНОГО СІЛЬСЬКОГО ГОСПОДАРСТВА
Authors: Domin Alexander 
Published: December 2018

У статті порушується проблема, що в незалежній Україні довгий час залишалася майже без уваги педагогічного загалу. Вона полягає в необхідності адаптації формування професійних компетентностей бакалаврів з агроінженерії до кардинальних змін у вітчизняному сільському господарстві, що відбулися з часів здобуття Україною незалежності. За цей час унаслідок глибинних реформ у сільському господарстві змінилися форми власності – з колективних і державних на приватні. У результаті цього сучасні приватні агрокомпанії господарюють і розвиваються за жорсткими законами ринкової економіки. Це означає, що головна мета такого господарювання – якомога більший прибуток – понад усе. Внаслідок такого, далеко не завжди прогресивного розвитку, сталися зміни у відлагодженій десятиліттями професійній підготовці інженерних кадрів для аграрної галузі, зокрема: порушення зв’язків, тепер уже приватних сільськогосподарських підприємств, із закладами вищої освіти аграрного профілю, порушення агрокомпаніями необхідних умов відтворення родючості ґрунту, економія на висококваліфікованих кадрах, що приводить до перекладки агрономічних, агрохімсервісних, захисторослинних та інших подібних завдань діяльності у компетентність бакалаврів з агроінженерії; переважний пріоритет імпортної сільськогосподарської техніки, що тягне за собою повну залежність українського сільського господарства від іноземних виробників видаткових та паливно-мастильних матеріалів до цієї техніки. Наведених змін достатньо, щоб зрозуміти, що існує істотна проблема у формуванні професійних компетентностей майбутніх бакалаврів з агроінженерії. Здійснено спробу визначити сучасні завдання діяльності бакалаврів з агроінженерії вітчизняного сільського господарства, визначити вимоги до формування їхніх професійних компетентностей.
Podcasts in teaching ESL
Authors: Chaikovska Olha 
Published: December 2018

The paper reports on research into the integration of podcasts in ESL teaching. This issue is currently of great interest. The article aims to highlight the potential of podcasts in teaching English. The study investigates this issue by comparing and generalizing the existing theoretical material on the topic and examining the effects of podcast application in language learning. The study is concerned with basic characteristics and types of podcasts. Much attention is given to general and professional podcasts, veterinarian and agricultural authentic listening material, in particular. The review of most popular English language podcasts for general and professional usage is given in the study. The author analyzes the strategies for podcast integration in ESL teaching process. It is found that both types of podcasts can be used with the first year university students: general podcasts can be used at preparatory cycle of curriculum, while profession podcasts can be integrated into profession- focused cycle of curriculum. The primary concern of this research is to examine the advantages of integration the podcasts in ESL classroom. The author argues that podcasts could serve as one of the up-to-date effective strategies for ESL learning. It can be concluded that authenticity, multilevelness, ability to promote intrinsic motivation and personal growth, effectiveness (the combination of visual and sound information) and convenience of podcasts make them attractive tool in language learning.
قياس كفاية رأس المال في المصارف الإسلامية وفقاً لاتفاقية بازل II
Authors: محمد سعد عبد 
Published: December 2018

إن أهمية كفاية رأس المال في المصارف الاسلامية تتمثل في تقوية المركز المالي في المصرف الاسلامي ودوره في مواجهة مختلف المخاطر المصرفية الناتجة عن طبيعة عمل المصارف الاسلامية ومن مختلف الاستثمارات وادوات التمويل وكذلك لمقابلة المسحوبات غير المتوقعة لعملائه .
لذا تهدف هذه الدراسة الى قياس كفاية راس المال على وفق اتفاقية بازل II . ومناقشة وتوضيح المخاطر المختلفة التي تواجهها المصارف الاسلامية ، الناتجة من طبيعة عمل المصارف الاسلامية ومختلف ادوات تمويلها واستثماراتها المتمثلة بالمشاركة والمضاربة والمرابحة فضلا عن اختلاف طبيعة موجوداتها ومطلوباتها كما هو عليه في المصارف التجارية التقليدية . وفي نهاية الدراسة يمكن استنتاج ضرورة زيادة رأس المال المصرفي الى اكثر من 8% على وفق ماجاءت به اتفاقية بازل الثانية ، كما يجب ايضا دمج المصارف الاسلامية بعضها ببعض ، لكي يزداد رأس مالها اضافة الى ضرورة تطور ادواتها المالية لكي تصبح اكثر فاعلية في أدارة المخاطر .
Developing Land-Use Regression Models to Estimate PM2.5-Bound Compound Concentrations
Authors: Hsu Chin-Yu , Wu Chih-Da , Hsiao Ya-Ping , Chen Yu-Cheng , Chen Mu-Jean , Lung Shih-Chun Candice 
Published: December 2018

Epidemiology estimates how exposure to pollutants may impact human health. It often needs detailed determination of ambient concentrations to avoid exposure misclassification. However, it is unrealistic to collect pollutant data from each and every subject. Land-use regression (LUR) models have thus been used frequently to estimate individual levels of exposures to ambient air pollution. This paper used remote sensing and geographical information system (GIS) tools to develop ten regression models for PM2.5-bound compound concentration based on measurements of a six-year period including NH 4 + , SO 4 2 − , NO 3 − , OC, EC, Ba, Mn, Cu, Zn, and Sb. The explained variance (R2) of these LUR models ranging from 0.60 to 0.92 confirms that this study successfully estimated the fine spatial variability of PM2.5-bound compound concentrations in Taiwan where the distribution of traffic, industrial area, greenness, and culture-specific PM2.5 sources like temples collected from GIS and remote sensing data were main variables. In particular, while they were much less used, this study showcased the necessity of remote sensing data of greenness in future LUR studies for reducing the exposure bias. In terms of local residents’ health outcome or health effect indicators, this study further offers much-needed support for future air epidemiological studies. The results provide important insights into expanding the application of GIS and remote sensing on exposure assessment for PM2.5-bound compounds.
Variability in Proto-planetary Nebulae. V. Velocity and Light Curve Analysis of IRAS 17436+5003, 18095+2704, and 19475+3119
Authors: Hrivnak Bruce J. , Van de Steene Griet , Van Winckel Hans , Lu Wenxian , Sperauskas Julius 
Published: December 2018

Abstract
We have obtained contemporaneous light, color, and radial velocity data for three proto-planetary nebulae (PPNe) over the years 2007 to 2015. The light and velocity curves of each show similar periods of pulsation, with photometric periods of 42 and 50 days for IRAS 17436+5003, 102 days for IRAS 18095+2704, and 35 days for IRAS 19475+3119. The light and velocity curves are complex with multiple periods and small, variable amplitudes. Nevertheless, at least over limited time intervals, we were able to identify dominant periods in the light, color, and velocity curves and compare the phasing of each. The color curves appear to peak with or slightly after the light curves while the radial velocity curves peak about a quarter of a cycle before the light curves. Similar results were found previously for two other PPNe, although for them the light and color appeared to be in phase. Thus, it appears that PPNe are brightest when smallest and hottest. These phase results differ from those found for classical Cepheid variables, where the light and velocity differ by half a cycle, and are hottest at about average size and expanding. However, they do appear to have similar phasing to the larger-amplitude pulsations seen in RV Tauri variables. Presently, few pulsation models exist for PPNe, and these do not fit the observations well, especially the longer periods observed. Model fits to these new light and velocity curves would allow masses to be determined for these post-AGB objects, and thereby provide important constraints to post-AGB stellar evolution models of low- and intermediate-mass stars.
Discovery of a Transiting Adolescent Sub-Neptune Exoplanet with K2
Authors: David Trevor J. , Mamajek Eric E. , Vanderburg Andrew , Schlieder Joshua E. , Bristow Makennah , Petigura Erik A. , Ciardi David R. , Crossfield Ian J. M. , Isaacson Howard T. , Cody Ann Marie , Stauffer John R. , Hillenbrand Lynne A. , Bieryla Allyson , Latham David W. , Fulton Benjamin J. , Rebull Luisa M. , Beichman Chas , Gonzales Erica J. , Hirsch Lea A. , Howard Andrew W. , Vasisht Gautam , Ygouf Marie 
Published: December 2018

Abstract
The role of stellar age in the measured properties and occurrence rates of exoplanets is not well understood. This is in part due to a paucity of known young planets and the uncertainties in age-dating for most exoplanet host stars. Exoplanets with well-constrained ages, particularly those which are young, are useful as benchmarks for studies aiming to constrain the evolutionary timescales relevant for planets. Such timescales may concern orbital migration, gravitational contraction, or atmospheric photoevaporation, among other mechanisms. Here we report the discovery of an adolescent transiting sub-Neptune from K2 photometry of the low-mass star EPIC 247267267. From multiple age indicators, we estimate the age of the star to be 120 Myr, with a 68% confidence interval of 100–760 Myr. The size of EPIC 247267267 b (R

P
= 2.8 ± 0.1 R
⊕) combined with its youth make it an intriguing case study for photoevaporation models, which predict enhanced atmospheric mass loss during early evolutionary stages.
The 3D Thermal, Dynamical, and Chemical Structure of the Atmosphere of HD 189733b: Implications of Wind-driven Chemistry for the Emission Phase Curve
Authors: Drummond Benjamin , Mayne Nathan J. , Manners James , Baraffe Isabelle , Goyal Jayesh , Tremblin Pascal , Sing David K. , Kohary Krisztian 
Published: December 2018

Abstract
In this paper we present 3D atmospheric simulations of the hot Jupiter HD 189733b under two different scenarios: local chemical equilibrium and including advection of the chemistry by the resolved wind. Our model consistently couples the treatment of dynamics, radiative transfer, and chemistry, completing the feedback cycle between these three important processes. The effect of wind-driven advection on the chemical composition is qualitatively similar to our previous results for the warmer atmosphere of HD 209458b, found using the same model. However, we find more significant alterations to both the thermal and dynamical structure for the cooler atmosphere of HD 189733b, with changes in both the temperature and wind velocities reaching ∼10%. We also present the contribution function, diagnosed from our simulations, and show that wind-driven chemistry has a significant impact on its 3D structure, particularly for regions where methane is an important absorber. Finally, we present emission phase curves from our simulations and show the significant effect of wind-driven chemistry on the thermal emission, particularly within the 3.6 μm Spitzer/IRAC channel.
The Effect of Baseline Layouts on the Epoch of Reionization Foreground Wedge: A Semianalytical Approach
Authors: Murray Steven G. , Trott C. M. 
Published: December 2018

Abstract
The 2D power spectrum is a cornerstone of the modern toolkit for analysis of the low-frequency radio interferometric observations of the 21 cm signal arising from the early universe. Its familiar form disentangles a great deal of systematic information concerning both the sky and telescope and is displayed as a foreground-dominated “brick” and “wedge” on large line-of-sight scales and a complementary “window” on smaller scales. This paper builds on many previous works in the literature that seek to elucidate the varied instrumental and foreground factors that contribute to these familiar structures in the 2D power spectrum. In particular, we consider the effects of uv sampling on the emergence of the wedge. Our results verify the expectation that arbitrarily dense instrument layouts in principle restore the missing information that leads to mode mixing and can therefore mitigate the wedge feature. We derive rule-of-thumb estimates for the required baseline density for complete wedge mitigation, showing that these will be unachievable in practice. We also discuss the optimal shape of the layout, showing that logarithmic regularity in the radial separation of baselines is favorable. While complete suppression of foreground leakage into the wedge is practically unachievable, we find that designing layouts that promote radial density and regularity is able to reduce the amplitude of foreground power by one to three orders of magnitude.
Comprehensive Measurements of the Volume-phase Holographic Gratings for the Dark Energy Spectroscopic Instrument
Authors: Ishikawa Yuzo , Sirk Martin M. , Edelstein Jerry , Jelinsky Patrick , Brooks David , Tarle Gregory ,   (DESI Collaboration)
Published: December 2018

Abstract
The Dark Energy Spectroscopic Instrument (DESI) is a Stage IV ground-based dark energy experiment that will be employed on the Mayall 4 m Telescope to study the expansion history of the universe. In the era of massively multiplexed fiber-fed spectrographs, DESI will push the boundaries of fiber spectroscopy with a design capable of taking 5000 simultaneous spectra over 360 to 980 nm. The instrument utilizes a suite of three-channel spectrographs, where volume-phase holographic (VPH) gratings provide dispersions. Thirty-six VPH gratings were produced and their performances were evaluated at the Lawrence Berkeley National Laboratory. We present the design and the evaluation tests for the production run of the VPH gratings, verifying the incidence angle, area-weighted efficiency, and wavefront errors (WFEs). We also present the specialized test set-up developed on-site to assess the grating performances. Measurements of the VPH gratings show high consistency in area-weighted efficiency to within an rms of 2% for the red and near-infrared and 6.2% for the blue gratings. Measured WFEs also showed high consistency per bandpass. Comprehensive evaluations show that the VPH gratings meet DESI performance requirements and have been approved for integration.
Quest for the Donor Star in the Magnetic Precataclysmic Variable V1082 Sgr
Authors: Tovmassian G. , González J. F. , Hernández M.-S. , González–Buitrago D. , Zharikov S. , Santisteban J. V. Hernández 
Published: December 2018

Abstract
We obtained high-resolution spectra and multicolor photometry of V1082 Sgr to study the donor star in this 20.8 hr orbital period binary, which is assumed to be a detached system. We measured the rotational velocity (

km s−1), which, coupled with the constraints on the white dwarf mass from the X-ray spectroscopy, leads to the conclusion that the donor star barely fills 70% of its corresponding Roche lobe radius. It appears to be a slightly evolved K2-type star. This conclusion was further supported by a recently published distance to the binary system measured by the Gaia mission. At the same time, it becomes difficult to explain a very high (>10−9

) mass transfer and mass accretion rate in a detached binary via stellar wind and magnetic coupling.
L’Égypte et la Méditerranée au I er millénaire av. J.-C. : le naïskos et les « Portes du Ciel »
Authors: Barcat Dominique 
Published: December 2018

Le point de départ de cette étude réside dans une scène d’offrande reproduite, avec seulement quelques variantes, sur onze miroirs en bronze égyptiens datés des vii e et vi e s. av. J.-C. Cette scène, placée dans l’encadrement de la façade d’un temple dont la forme est caractéristique des naïskoi égyptiens, donne à voir un personnage féminin qui présente à la déesse Mout un miroir. L’ensemble du décor, ainsi que le thème de l’offrande du miroir en lui-même, sont très fortement liés au culte hathorique et aux développements que celui-ci connaît depuis le Nouvel Empire. L’article propose d’explorer les pistes ouvertes par cette iconographie : elles amènent à se pencher sur les résonances des cultes hathoriques en Méditerranée et à comprendre comment le motif du naïskos a gagné différentes traditions artistiques, bien au-delà de la vallée du Nil.
La ville en chantier ou la marche entravée : vers une perception renouvelée de l’urbanisme oriental romain
Authors: Tholbecq Laurent 
Published: December 2018

La communication vise à explorer le rapport entretenu entre la marche et l’espace urbain dans le monde romain. Pour ce faire, les occurrences du terme ambulatio sont étudiées chez Celse, lequel recommande la pratique de la marche en plein air plutôt que celle effectuée « sous un toit ». Elle se penche ensuite sur le cadre de cet exercice, promenades ouvertes et portiques couverts. Il est ainsi fait écho aux recherches les plus récentes qui ont exploré les modalités de la construction des portiques urbains en Orient (Palmyre, Gerasa de la Décapole) et souligné le caractère morcelé voire inabouti de leur mise en œuvre. On est par ailleurs revenu sur le constat réalisé de longue date par Jean Sauvaget d’un empiétement du portique par les fonctions marchandes des boutiques adjacentes ; comme l’a brillamment démontré Catherine Saliou, loin de refléter une perte de l’autorité centrale, cet envahissement naturel a, au contraire, provoqué une réaction de celle-ci et la mise en place d’un appareil législatif pragmatique, visant à l’endiguer. Il en ressort que, contrairement aux apparences, les portiques qui flanquent les rues à colonnades des grandes villes de l’Orient romain ne constituent en rien des espaces de circulation piétonniers privilégiés propices à une marche d’agrément.
Les flâneurs, observateurs du « paysage des grandes cités » dans le quartier du West End à Londres au début du XIX e siècle
Authors: Arnold Dana 
Published: December 2018

L’histoire des villes et des espaces a été largement limitée aux récits de la vie des architectes et de leurs commanditaires ou de leur planification. À l’opposé, cet essai s’attache à la façon dont des individus peuvent servir à expliquer des réseaux de relations sociales, culturelles et spatiales ou à les articuler. Les acteurs spécifiques qui m’intéressent sont les cousins londoniens des « flâneurs » de Charles Baudelaire, observateurs nonchalants du « paysage des grandes cités », qui se sentent chez eux dans le flot anonyme de la foule urbaine. Mon intention est ici d’explorer les relations entre l’individuel et la foule urbaine dans le cadre particulier du quartier du West End de la ville de Londres du début du XIX e siècle. Londres, une cité moderne avec ses nouveaux spectacles urbains, créait une atmosphère de rêve pour le flâneur. La nouveauté de ces espaces donnait une impression de perte des repères spatiaux, et faisait de l’environnement urbain une expérience étrange et sublime. Ce genre de réaction était le résultat de la relation établie entre la nouvelle société métropolitaine (avec ses flâneurs) et les nouveaux espaces urbains.