bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pétrologie des pyroxénites litées dans les complexes ultramafiques de l'Ariège (France) et autres gisements de lherzolite à spinelle. I. Compositions minéralogiques et chimiques, évolution des conditions d'équilibre des pyroxénites
Authors: Conquéré Fernand 
Published: October 2019

The layered pyroxenites in the main lherzolitic bodies from Ariege recrystallized from primary paragenesis composed of Al₂O₃-rich bronzites and Al₂O₃ and MgSiO₃-rich augites in variable proportions, commonly associated with small amounts of spinel (pleonaste to picotite). Pyrope-rich garnet or olivine are present in a few types. The relationships between pyroxenites and adjacent peridotites, as well as the mineralogical and chemical zonation of the layers, indicate that the primary paragenesis represent segregates of the phases which crystallized successively from melts ranging from picritic tholeiitic to normative nepheline basalt compositions. Olivine being the liquidus phase in the primary melt, its extraction leads to orthopyroxene as the primary phase in the residual liquid. As this segregation process goes on, bronzite is replaced by clinopyroxene and by clinopyroxene plus garnet in the last residual melts preserved in the ultramafic body. This crystallization sequence and the initial chemical composition of the pyroxenes are compatible with P-T conditions starting at 1600° C between 15 kb and 20 kb and ending under isobaric or quasi isobaric conditions at about 1200° C.
The primary paragenesis recrystallized during two major episodes, the first one before the plastic flow, the second one during the deformations. Observed subsolidus reactions and the chemical compositions of the recrystallized minerals indicate that the last major episode of recrystallization occurred at 800°-900° C between 12 kb and 15 kb, i. e. near crystallization pressures.
From a review of published data it is concluded that the pyroxenites associated with spinel lherzolites everywhere in the world, either in complexes or among xenoliths in alkali basalts, originate from the same segregation process. They seem to have crystallized and recrystallized under physico-chemical conditions close to those defined in the Ariege district, i. e. in the uppermost parts of the upper mantle, between about 35 to 70 km deep.
Temperatures and pressures under which pyroxenites crystallized imply that spinel lherzolite bodies have been built up either from a crystal mush, mainly of olivine and orthopyroxene, or from a liquid of picritic composition. Examination of this alternative can be reduced to the discussion of two hypothesis : in the first one, the layered pyroxenites crystallize from melts originated by one or several partial fusion processes occurring as ultramafic bodies move towards the surface ; in the second one, periodites as well as pyroxenites are of primary magmatic origin. Both hypothesis are discussed in the second part of this paper.
PENGARUH LATIHAN UPHILL RUNNING TERHADAP KECEPATAN LARI SPRINT 60 METER PADA SISWA EKSTRAKURIKULER ATLETIK SMP SWADAYA PANGKALPINANG
Authors: Alzazair, Pratiwi Amelia and Erick Prayogo  
Published: October 2019

Permasalahan dalam penelitian ini adalah 1) Kurangnya pembinaan latihan dan program latihan yang kurang tepat, 2) Masih rendahnya kecepatan lari sprint 60 meter. 3) Metode latihan yang belum tepat untuk meningkatkan kecepatan lari sprint 60 meter, 4) Prestasi lari sprint 60 meter yang belum optimal. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana Pengaruh Latihan Uphill Running Dalam Meningkatkan Kecepatan Lari Sprint 60 Meter Pada Siswa Ekstrakurikuler Atletik SMP Swadaya Pangkalpinang. Metode penelitian yang digunakan dalam penelitian ini adalah metode eksperimen. Populasi dalam penelitian ini seluruh siswa ekstrakurikuler SMP Swadaya Pangkalpinang yang berjumlah 20 orang. Teknik pengambilan sampel menggunakan Total Sampling. Teknik pengumpulan data menggunakan tes dan pengukuran. Tes yang digunakan merupakan tes lari sprint 60 meter. Hasil pengukuran data di uji menggunakan uji normalitas, uji homogenitas dan iji hipotesis. Hasil Uji t diperoleh nilai t hitung = 6,676, nilai ttabel = 2,101, nilai t hitung > t tabel, menunjukkan bahwa latihan uphill running berpengaruh positif terhadap kecepatan lari sprint 60 meter pada ekstrakurikuler atletik SMP Swadaya Pangkalpinang. Simpulan yang diambil dalam penelitian ini “latihan uphill running berpengaruh terhadap kecepatan lari sprint 60 meter pada ekstrakurikuler atletik SMP swadaya pangkalpinang.”
Kata kunci: Latihan Uphill Running, Kecepatan, Lari Sprint 60 Meter
PENGARUH MEDIA CARDBOARD ANIMATED TERHADAP KEMAMPUAN TEKNIK DASAR TENDANGAN T PADA MATERI BELA DIRI PENCAK SILAT SISWA KELAS X SMAN 1 PUDING BESAR
Authors: Maulana, Dedy Putranto dan Erick Prayogo Walton  
Published: October 2019

Permasalahan dalam penelitian ini adalah 1) sebagian besar dari siswa kelas X SMAN 1 Puding Besar kemampuannya masih rendah dalam melakukan teknik dasar tendangan T, 2). kurangnya kreativitas guru dalam memanfaatkan media bantu untuk menunjang kemampuan tendangan T siswa. Penelitian ini bertujuan untuk mengetahui ada atau tidaknya Pengaruh media cardboard animated terhadap kemampuan teknik dasar tendangan T materi bela diri pencak silat siswa Siswa kelsa X SMA Negeri 1 Puding Besar.Pendekatan yang digunakan dalam penelitian ini adalah pendekatan kuantitatif dengan metode quasi eksperimental, jenis desain yang digunakan adalah nonequivalent control group design. Populasi dalam penelitian ini seluruh siswa SMA Negeri 1 Puding Besar Tahun 2018 yang berjumlah 144 orang. Sampel dari penelitian ini adalah kelas X IPA 1 sebagai kelas eksperimen dan kelas X IPA 2 sebagai kelas kontrol dengan teknik pengambilan sampel menggunakan Purposive Sampling. Teknik pengumpulan data menggunakan tes kemampuan. Tes yang digunakan merupakan tes kemampuan teknik dasar tendangan T menggunakan instrument yang telah disusun. Hasil pengukuran data diuji menggunakan uji normalitas, uji homogenitas dan uji hipotesis uji t test.Hasil penelitian menunjukan bahwa, dari pengujian hipotesis hasil teknik dasar tendangan T antara kelas eksperimen dan kelas kontrol diketahui nilai thitung= 2,363, nilai ttabel = 1,684, nilai thitung > ttabel, maka H0 ditolak artinya terdapat pengaruh secara signifikan penggunaan media cardboard animated terhadap kemampuan teknik dasar tendangan T materi bela diri pencak silat siswa kelas X SMA Negeri 1 Puding Besar.
Kata kunci: Media Cardboard Animated, Kemampuan Teknik Dasar Tendangan T
PENGARUH PENGGUNAAN MACROMEDIA FLASH TERHADAP HASIL BELAJAR SISWA MELALUI MODEL PEMBELAJARAN REALISTIC MATHEMATIC EDUCATION PADA MATERI FUNGSI KOMPOSISI KELAS X IIS 3 SMAN 1 NGADILUWIH
Authors: Mala Laitali , Latif Fanda R.P. , Zahro’ Hilyatu , Muftikah Linta F. 
Published: October 2019

Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh penggunaan Macromedia Flash melalui model pembelajaran Realistic Mathematic Education terhadap hasil belajar siswa kelas X-IIS 3 pada materi fungsi komposisi. Penelitian ini merupakan jenis penelitian penelitian kuantitatif dengan eksperimen. Penelitian ini dilakukan di SMAN 1 Ngadiluwih, Kediri tahun ajaran 2018/2019 dengan sampel 1 kelas. Pengambilan sampel dilakukan dengan cara Simple Random sampling. Analisis data pada penelitian ini yang pertama adalah menggunakan uji normalitas. Setelah data dinyatakan berdistribusi normal uji selanjutnya adalah uji homogenitas. Uji yang terakhir adalah uji t dua sampel berpasangan, dengan taraf signifikasi sebesar 0,05. Dari hasil uji tersebut diperoleh t = -4,324, dengan df = 28 dan angka sig. atau p-value = 0,000 < 0,05 atau ditolak yang artinya terdapat perbedaan hasil belajar fungsi komposisi siswa antara sebelum dan sesudah diberi Macromedia Flash. Sehingga dapat dikatakan ada pengaruh penggunaan Macromedia Flash melalui model Realistic Mathematic Education terhadap hasil belajar siswa kelas X-IIS 3 SMAN 1 Ngadiluwih Kediri pada materi fungsi komposisi.
"مُعَدَّلات انتشار السلوك العدواني لدى عينة من تلاميذ المرحلة الابتدائية
في مدينة مصراتة"
Authors: النعاس عمر مصطفي , الطـــالب سالــمة أحمد 
Published: October 2019

المدرسة هي البيت الثاني للتلميذ الذي يكون فيه علاقات اجتماعية بزملائه التلاميذ؛ بالإضافة إلى التعلم فيها, كما تعتبر المدرسة الأرض الخصبة أو المكان المناسب الذي يفرغ فيه الطفل طاقاته وشحناته, وما يحس به وما يؤثر على نفسيته, وخاصة بعد أن عاش الأطفال ظروف نفسية سيئة خلال فترة التحرير, مما اثر سلباً على قدراتهم وثقتهم بأنفسهم وشعورهم بالأمن مما أحسسهم بالإحباط, مما يدور حولهم وإدخالهم في بعض المشاكل النفسية ومن هذه المشاكل السلوك العدواني, ويقصد به الهجوم الصريح على الذات أو الآخرين, ويأخذ عدة أشكال منها اللفظي والبدني والمادي وقد يكون السلوك العدواني مباشر أو غير مباشر, كما أن له العديد من الأنماط لدى الأطفال في المرحلة الابتدائية. (إيهاب البيلاوي، 2004،22)
و إنَّه من الميسور دائماً الحكم على البالغين بالاضطراب وعدم النضوج عندما نلاحظ تقارباً بين أنواع ما يصدر منهم من سلوك وما يصدر عن الطفل، ففي مثل هذه الحالات نصفهم بعدم النضوج والاضطرابات بسبب صفاتهم الطفوليَّة، لكن عندما تصدر مثل هذه التصرُّفات من الطفل فإنَّها قد تكون مقبولة ومناسبة لعمره ومتطلَّبات النمو التي يمرُّ بها وما تتطلَّبه هذه المرحلة من تغيُّرات فكريَّة وانفعاليَّة واجتماعيَّة، لهذا يحذِر علماء العلاج النفسيِّ – السلوكي من الاندفاع في وصف طفل معيَّن بالاضطراب. ومن ثمَّ وجب على المعلِّم أن يكون ملمّاً بخصائص النمو وتطوُّر الطفولة ليسهل عليه معرفة ما يحتاج من سلوك الأطفال إلى تدخُّل بسبب شذوذه وعدم ملاءمته لمتطلَّبات النمو، أو ما يحتاج إلى التجاهل أو حتَّى التشجيع بسبب انسجامه مع تلك المتطلَّبات.	(خالد خليل الشيخلي،2005،76).
إنَّ كثيراً من الاضطرابات كالعدوان والتحطيم والبكاء وهي المشكلات التي تسبِّب إزعاجاً للأسرة وللمعلِّمين قد تكون لدى كثير من الأطفال تعبيراً يتناسب مع الفترة الزمنيَّة التي يمرُّ بها الطفل، ومن ثمَّ فإنَّه لا يجوز وصفها بالشذوذ أو المرض أو المشاكسة، وبالمقابل فإنَّ كثيراً من المشكلات التي تصدر عن بعض الأطفال لا تكون مطلباً من مطالب النمو ولا تنسجم مع التطوُّر الزمنيِّ للطفل وما يصحبه من تطوُّر انفعالي أو عقلي أو اجتماعي ومثل هذه المشكلات قد يتفاقم بعضها لدرجة يمكن معها وصفها بالاضطراب. (خولة أحمد يحيى،2012،87).
والمدارس في مدينة مصراتة مثل أغلب المدارس في ليبيا تعاني من انتشار مظاهر السلوك العدواني وإن كانت لم تبلغ الحدود القصوى في العدوان, غير أن أهمية هذا السلوك تكمن في الآثار السلبية الناتجة عنه التي تطال التلاميذ وتهدد تماسك الأسرة والعلاقات بين الجماعات في المدرسة بين التلاميذ أنفسهم وبينهم وبين المعلمين. وقد توصلت دراسة قوس (2011) إلى وجود فروق دالة إحصائياً في مستوى العنف بين الطلبة والطالبات وأن مستوى العنف لدى الطلبة أعلى من مستوى العنف لدى الطالبات. ومن خلال ملاحظة الباحث لتلاميذ المرحلة الابتدائية يرى الباحث أن السلوك العدواني لتلاميذ المرحلة الابتدائية أصبح منتشراً في المدارس بشكل واضح من بعد حرب التحرير كنتيجة حتمية لما يواجها التلميذ من احباطات متكررة من البيئة المحيطة به من تهميش أو ظلم أو لامبالاة.
ومن هذا المنطلق قامت الباحث بإجراء البحث على أنماط السلوك العدواني الشائعة لدى تلاميذ المرحلة الابتدائية بمدينة مصراتة.
Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
Authors: Kim Joonho , Im Myungshin , Choi Changsu , Hwang Sungyong 
Published: October 2019

Abstract
Reverberation mapping (RM) is one of the most efficient ways to investigate the broad-line region around the central supermassive black holes of active galactic nuclei (AGNs). A common way of performing the RM is to perform a long term spectroscopic monitoring of AGNs, but the spectroscopic monitoring campaign of a large number of AGNs requires an extensive amount of observing time of medium to large size telescopes. As an alternative way, we present the results of photometric RM with medium-band photometry. As the widths of medium-band filters match well with the widths of AGN broad emission lines, the medium-band observation with small telescopes can be a cost-effective way to perform RM. We monitored five nearby AGNs with available spectroscopic RM results showing days to weeks scale variability. Observations were performed for ∼3 months with an average of 3 days cadence using three medium-band filters on a 0.43 m telescope. The time lags between the continuum and the Hα emission line light curves are calculated using the JAVELIN software and the discrete correlation function. We find time lags of 1.5–15.9 days for these AGNs, which are consistent with the time lags derived from previous spectroscopic RM measurements. This result demonstrates that even a 0.5 m class telescope can perform RM with medium-bands. Furthermore, we show that RM for tens of thousands AGNs is possible with a dedicated 1 m class telescope.
The Inside-out Growth of the Galactic Disk
Authors: Frankel Neige , Sanders Jason , Rix Hans-Walter , Ting 丁 Yuan-Sen 源森 , Ness Melissa 
Published: October 2019

Abstract
We quantify the inside-out growth of the Milky Way’s low-α stellar disk, modeling the ages, metallicities, and Galactocentric radii of APOGEE red clump stars with 6 kpc < R < 13 kpc. The current stellar distribution differs significantly from that expected from the star formation history due to the redistribution of stars through radial orbit mixing. We propose and fit a global model for the Milky Way disk, specified by an inside-out star formation history, radial orbit mixing, and an empirical, parametric model for its chemical evolution. We account for the spatially complex survey selection function, and find that the model fits all data well. We find distinct inside-out growth of the Milky Way disk; the best-fit model implies that the half-mass radius of the Milky Way disk has grown by 43% over the last 7 Gyr. Yet, such inside-out growth still results in a present-day age gradient weaker than 0.1 Gyr kpc−1. Our model predicts the half-mass and half-light sizes of the Galactic disk at earlier epochs, which can be compared to the observed redshift–size relations of disk galaxies. We show that radial orbit migration can reconcile the distinct disk-size evolution with redshift, also expected from cosmological simulations, with the modest present-day age gradients seen in the Milky Way and other galaxies.
A Particle Module for the PLUTO Code. III. Dust
Authors: Mignone A. , Flock M. , Vaidya B. 
Published: October 2019

Abstract
Implementation of a new particle module describing the physics of dust grains coupled to a gas via drag forces is the subject of this work. The proposed particle–gas hybrid scheme has been designed to work in Cartesian as well as in cylindrical and spherical geometries. The numerical method relies on a Godunov-type second-order scheme for the fluid and an exponential midpoint rule for dust particles, which overcomes the stiffness introduced by the linear coupling term. Besides being time-reversible and globally second-order accurate in time, the exponential integrator provides energy errors that are always bounded, and it remains stable in the limit of arbitrarily small particle stopping times, yielding the correct asymptotic solution. Such properties make this method preferable to the more widely used semi-implicit or fully implicit schemes at a very modest increase in computational cost. Coupling between particles and grid quantities is achieved through particle deposition and field-weighting techniques borrowed from particle-in-cell simulation methods. In this respect, we derive new weight factors in curvilinear coordinates that are more accurate than traditional volume or area weighting. A comprehensive suite of numerical benchmarks is presented to assess the accuracy and robustness of the algorithm in Cartesian, cylindrical, and spherical coordinates. Particular attention is devoted to the streaming instability, which is analyzed in both local and global disk models. The module is part of the PLUTO code for astrophysical gas dynamics, and it is mainly intended for the numerical modeling of protoplanetary disks in which solid and gas interact via aerodynamic drag.
Puffy Accretion Disks: Sub-Eddington, Optically Thick, and Stable
Authors: Lančová Debora , Abarca David , Kluźniak Włodek , Wielgus Maciek , Sa̧dowski Aleksander , Narayan Ramesh , Schee Jan , Török Gabriel , Abramowicz Marek 
Published: October 2019

Abstract
We report on a new class of solutions of black hole accretion disks that we have found through three-dimensional, global, radiative magnetohydrodynamic simulations in general relativity. It combines features of the canonical thin, slim, and thick disk models but differs in crucial respects from each of them. We expect these new solutions to provide a more realistic description of black hole disks than the slim disk model. We are presenting a disk solution for a nonspinning black hole at a sub-Eddington mass accretion rate,

. By the density scale-height measure the disk appears to be thin, having a high density core near the equatorial plane of height

, but most of the inflow occurs through a highly advective, turbulent, optically thick, Keplerian region that sandwiches the core and has a substantial geometrical thickness comparable to the radius, H ∼ r. The accreting fluid is supported above the midplane in large part by the magnetic field, with the gas and radiation to magnetic pressure ratio β ∼ 1, this makes the disk thermally stable, even though the radiation pressure strongly dominates over gas pressure. A significant part of the radiation emerging from the disk is captured by the black hole, so the disk is less luminous than a thin disk would be at the same accretion rate.
Genetic diversity and biofilm formation analysis of Staphylococcus aureus causing urinary tract infections in Tehran, Iran
Authors: Goudarzi Mehdi , Mohammadi Anis , Amirpour Anahita , Fazeli Maryam , Nasiri Mohammad Javad , Hashemi Ali , Goudarzi Hossein 
Published: October 2019

Introduction: Over the past decades, prevalence of biofilm-forming Staphylococcus aureus strains has significantly increased in urinary tract infections. The aim of this study was to investigate prevalence of biofilm forming and adhesion encoding genes and to analyze distribution of different agr and spa types in S. aureus isolates.
Methodology: In the present study, 75 S. aureus isolates obtained from patients with urinary tract infections were examined for susceptibility to antimicrobial agents. Adhesion, biofilm, and spa encoding genes were detected by PCR screening; agr types were determined using multiplex PCR.
Results: Among the 75 isolates, 72% were biofilm producers and 28% were non-biofilm producers. Notably, the ability to produce biofilm was higher among MRSA strains ompared to MSSA strains. The most prevalent biofilm forming gene was icaD (77.3%), followed by icaA (76%), icaB (57.3%) and icaC (50.7%). Adhesion genes clfA, clfB, fnbB, can, fnbA, ebp and bap were detected in 94.7%, 92%, 68%, 64%, 64%, 60% and 5.3% of the isolates, respectively. The spa types t426 and t7789 were found among the non-MDR isolates. It was found that t790, t084, t7789 and t325 spa types were biofilm producers, while t426 and t1339 spa types were non-biofilm producers.
Conclusion: Biofilm encoding genes icaD and spa type t790 and agr type III were the most prevalent factors among MDR biofilm producer isolates. The study emphasized that identification of genes and characterization of molecular types involved in biofilm formation should be considered.
Studygrammers: Learning influencers
Authors: Izquierdo-Iranzo Patricia , Gallardo-Echenique Eliana-E. 
Published: October 2019

Present learning ecologies are diverse and change quickly, which demands a similar observation of the phenomenon. This paper is focused on the youth emerging informal learning communities and the study’s object is to discover and characterize a new figure in this landscape, the Studygrammer. With surveys (N=256), focus groups carried out through the Philips 66 technique and analyze with Atlas ti software (thematic analysis) we analyze: practices of academic social media use amongst Communication students and apart of the institutional enviroment, plus their opinions regarding the #Studygram community, #Studygrammer profiles from different degrees are also analyzed. Main results help us to concrete a definition for Studygrammer: a student that performs a mentoring (coach-leader) role amongst peers using Instagram, not only sharing notes (highly performed) but also tips, inspiration and experiences. They have the DNA of an influencer using the same visual code and monetizating their practices but the academic goal adds some peculiarities: the visual code works as lingua franca between different knowledge areas (students of a certain degree follow studygrammers which study different degrees, because they are also interested on the know-how learning process) and in the followers’ adhesion criteria we find more rational than emotional reasons.
Las actuales ecologías de aprendizaje destacan por su variedad, dinamismo y mutabilidad, lo que requiere una observación análoga de las mismas. Este trabajo se centra en las culturas de aprendizaje informal juvenil emergentes, tomando como objetivo principal reconocer y caracterizar una nueva figura en medios sociales en línea: el estudigramer. Empleando cuestionarios (N=256), grupos de discusión organizados mediante Philips 66 (N=56) y Atlas.ti (análisis temático), y observación participante, se analizan: prácticas de uso académico en redes sociales por parte de estudiantes de Comunicación al margen del entorno institucional, la opinión sobre la comunidad #Studigram, y el análisis de perfiles. Los principales resultados se concentran en una propuesta de definición del estudigramer: véase aquel estudiante que ejerce la labor de mentor y líder entre pares del ámbito académico en Instagram. Este perfil no solo comparte apuntes (que sobresalen por su orden y detallada estética), sino que también transmite consejos, apoyo y experiencias. De hecho, el estudigramer mantiene la genética influencer al priorizar la estética y monetización en sus publicaciones. Se concluye que el fin académico añade características exclusivas a la comunidad, donde el código visual funciona como lengua franca entre ámbitos de estudio. En efecto, los estudigramers cuentan con seguidores de diversos grados académicos que buscan el «saber hacer» (gestión y planificación del aprendizaje), así como una adhesión fundamentalmente racional.
História do ensino industrial no Brasil: uma análise historiográfica da obra de Celso Suckow da Fonseca
Authors: Silva Juan Carlo Cruz , Medeiro Neta Olívia Morais 
Published: October 2019

No presente trabalho realizamos uma análise historiográfica da obra História do ensino industrial no Brasil, de autoria do educador-engenheiro Celso Suckow da Fonseca (1905-1966). Utilizamos o método histórico, conforme descrito por Rüsen (2015), buscando compreender os pressupostos teórico-metodológicos que nortearam a obra. Os entendimentos de intelectual, lugar social e escrita da história são referenciais para a análise da fonte. Diante da sua atuação em diversos papéis no campo da educação profissional no Brasil, Suckow apresenta indícios de sua escrita engajada. A partir das matrizes interpretativas, propostas por Xavier (2011), apontamos elementos da matriz político-institucional na obra analisada, mas concomitantemente às matrizes sociológica e político-ideológicas.