bluuebunny/crossref_metadata_2025_split huggingface dataset:
SUBSTANTIATION OF ROLLING-STOCK DESIGN SCHEME FOR ORGANIZATION OF ROAD-TRAINS AND WHEEL EQUIPMENT TRANSPORTATION
Authors: Manueva Marina , Rasin Dmitriy , Antipin Dmitriy , Ashurkova Svetlana 
Published: February 2020

The work is dedicated to the substantiation of design schemes of platform-cars for the organization of road-trains and wheel engineering transportation by railway. In the paper the analysis presented of rolling-stock designs for the organization of road-train and wheel equipment transportation, legislation requirements, a standard legislation for designing rolling-stock, requirements of transport operators and a logistic infrastructure existing in the country allowed formulating criteria for the choice of an efficient design scheme of a platform-car.
In accordance with the criteria accepted there are offered three versions for the design of cars. In the first two versions of platform-cars there is foreseen a lower stationary platform on a based length. The difference of the second version consists in the application of a bearing element in a truss structure as a basic one. For both designs there are obtained utility patents. The third version provides for the presence of a load lifting platform. For the substantiation of an efficient design of a platform-car there is carried out an analysis of operation engineering-economic properties, values of driving dynamics, strength, fatigue life and a life cost of three car versions under consideration. The comparison of designs according to all parameters mentioned allowed defining the fact that taking into account the specificity of the domestic legislation, requirements of standard-regulation documentation for rolling-stock designing, and also the interests of transport operators the most efficient design scheme is a platform-car with a stationary lower level of a load platform on a base length and a bearing design of a truss type.
Study of Microstructural Development of Bainitic Steel using Eddy Current and Synchrotron XRD in-situ Measurement Techniques during Thermomechanical Treatment∗
Authors: Dong J. , Skalecki M. G. , Hatwig R. A. , Bevilaqua W. L. , Stark A. , Epp J. , da Silva Rocha A. , Zoch H.-W. 
Published: February 2020

Abstract
In the field of massive forged components the mechanical engineering industry searches for processes with increasing energy and resource efficiency. The new generation bainitic steels are promising for such application because of the high strength, toughness and fatigue properties. In order to achieve the desired mechanical properties, the development of the bainitic microstructure depending on the parameters of the thermomechanical process and on the cooling procedure must be well-known. In the present work diverse experimental techniques were applied for the investigation of the microstructural development during thermomechanical treatment and subsequent continuous cooling through the bainitic transformation range. The thermomechanical processes were simulated using dilatometers and at the same time, the specimens were analyzed using an eddy current sensor or using in-situ X-ray diffraction measurements at synchrotron (DESY). The results show that the eddy current sensor is suitable for the monitoring of the microstructural development during cooling and during deformation. From the investigations suitable process parameters were deduced for achieving a possibly fine bainitic microstructure. The main factors are a relatively low deformation temperature in austenitic range, a fast cooling (> 2 K/s) into the bainitic range, bainitic transformation and/or a short deformation in the lower bainite range, and finally a slower cooling until room temperature.
PENINGKATAN HASIL BELAJAR MATERI PERSAMAAN KUADRAT MELALUI MODEL PEMBELAJARAN THINK PAIR SHARE BERBANTUAN KOMPUTER PADA SISWA KELAS IXB SMP NEGERI 26 SEMARANG
Authors: Marwanto Rudi 
Published: February 2020

<p>Penelitian ini dilatar belakangi banyak siswa yang kurang memiliki kemampuan dan kemauan belajar, sehingga belajar merupakan sesuatu yang sulit dan membosankan. Salah satu sebab kebosanan, dan kesulitan siswa terhadap pelajaran matematika disebabkan anggapan ketidakgunaan pelajaran matematika dalam kehidupan sehari-hari. Tujuan penulisan karya ilmiah ini adalah (1) untuk mengetahui apakah model pembelajaran <em>Think Pair Share</em> berbantuan komputer dapat meningkatkan hasil belajar materi Persamaan Kuadrat siswa kelas IXB SMP Negeri 26 Semarang (2) untuk mengetahui apakah model pembelajaran <em>Think Pair Share</em> berbantuan komputer dapat meningkatkan keaktifan siswa kelas IXB SMP Negeri 26 Semarang Semester I Tahun Pelajaran 2019/2020.</p><p>Penelitian ini merupakan penelitian tindakan kelas dengan metode analisis data, menggunakan metode deskriptif komparatif yaitu membandingkan rata-rata nilai tiap siklus dengan indikator kinerjanya. Pelaksanaan penelitian dilakukan dalam dua siklus. Hasil refleksi siklus pertama digunakan untuk menyempurnakan siklus kedua. Tiap-tiap siklus terdiri dari tahap perencanaan, pelaksanaan tindakan, pengamatan dan refleksi.</p><p>Hasil penelitian menunjukkan bahwa pada siklus I rata-rata kelas adalah 65,32 dengan persentase ketuntasan klasikal 52 %. Pada siklus II rata-rata kelas adalah 76,13 dengan persentase ketuntasan 87 %. Keaktifan siswa setelah dilakukan Penelitian Tindakan Kelas siklus I keaktifan siswa yaitu 66% katagori cukup. kemudian pada siklus II keaktifan siswa meningkat menjadi 76% katagori tinggi.</p>Simpulan yang dapat diambil bahwa penggunaan Model Pembelajaran <em>Think Pair Share</em> berbantuan komputer dapat Meningkatkan Hasil Belajar dan keaktifan pada materi persamaan kuadrat siswa kelas IXB SMP Negeri 26 Semarang.
Perancangan Aplikasi Pendeteksi Kebersihan Air Dalam Tangki Air Menggunakan Smartphone Berbasis IoT
Authors: Sany Nasril , Hanum Gilang Kartika , Sutrisno Sigit 
Published: February 2020

Android merupakan salah satu sistem operasi yang bersifat open source, sehingga dapat dikembangkan sendiri oleh para pengguna. Berkembangnya aplikasi android pada smartphone mendorong untuk membuat sebuah sistem smart house yang digunakan untuk mengendalikan dan memantau peralatan rumah tangga seperti tangki air. Tangki air merupakan suatu kebutuhan yang harus dipenuhi di zaman sekarang, kesulitan dalam mengontrol air dalam tangki air suatu kendala yang saat ini dirasakan pada masyarakat. Dengan bantuan kemajuan teknologi saat ini yaitu IoT (Internet of Thing) dapat mengurangi masalah yang ada saat ini, hanya menggunakan smartphone android dan mikrokontroler. Smartphone android berfungsi untuk mengirim dan menerima sinyal informasi ke dan dari mikrokontroler melalui jaringan internet. Informasi didapatkan dari mikrokontroler berupa Wemos D1 Mini yang di ditempatkan dalam tangki air Kemudian LDR memberikan insensitas tingkat kebersihan air berdasarkan cahaya yang masuk lalu LED memberikan tanda ketika air dalam tingkat kejenuhan yang tinggi. Aplikasi ini menggunakan Bylink yang dapat memonitoring tangki air dengan didapatkannya notifikasi dari mikrokontroler yang sudah ditanamkan dalam tangki air. Dengan adanya hal tersebut, masyarakat dapat menikmati hidup lebih sehat yang dikarenakan dapat mengontrol kebersihan tangki air dengan mudah dan praktis.
Trauma de vena cava en pacientes politraumatizados: Experiencia en el hospital Dr. Sótero del Río.
Authors: Ramos Perkis Juan Pablo , Ottolino Lavarte Pablo Rafael , Zinco Acosta Analía , Muñoz alarcon Carolina Andrea , Diaz fernandez Alfonso 
Published: February 2020

Introducción: Por su ubicación retroperitoneal, las lesiones de vena cava (LVC) son infrecuentes, presentándose en el contexto de un paciente con múltiples lesiones intraabdominales y en estado crítico. Objetivo: Describir la experiencia de pacientes politraumatizados con LVC sometidos a resolución quirúrgica en Hospital Dr. Sotero del Río. Materiales y métodos: Análisis retrospectivo de 36 pacientes politraumatizados que dentro de la intervención quirúrgica se evidenció LVC en un período comprendido entre el 2010 y 2017. Resultados: La serie estuvo compuesta por 36 pacientes, con LVC. El 88,8% son hombres, en el 97,2% el mecanismo de trauma es penetrante. Dentro de los niveles anatómicos vasculares más frecuentemente lesionados está la cava infra-renal (41,6%), suprarrenal (25%), yuxta-renal (22,2%) y la retrohepática e intratorácica (5,5% cada una). Las estructuras lesionadas asociadas más frecuentes fueron intestino delgado (38,8%), otros vasos de gran calibre (36,1%) y riñón (30,5%). Dentro del tipo de resolución quirúrgica, al 15,6% se realizó ligadura de vena cava y al 83,3% rafia simple. En 33,3% fue necesaria una toracotomía para el control vascular, siendo 2 de estas toracotomías resucitadoras. La media de hospitalización fue de 19,8 días. La mortalidad fue de 33,3%. Conclusiones: De acuerdo a lo presentado, la alta mortalidad de LVC se encontró en el grupo de pacientes con inestabilidad hemodinámica y número de lesiones asociadas, en especial si involucran otros grandes vasos. Los esfuerzos para optimizar la supervivencia se deberían dirigir al traslado rápido prehospitalario y al entrenamiento de los cirujanos que enfrentan este tipo de lesiones.
Effect of hydrocarbon molecular ion size for amorphous region formation analyzed by X-ray photoelectron spectroscopy
Authors: Kadono Takeshi , Okuyama Ryosuke , Onaka-Masada Ayumi , Hirose Ryo , Shigematsu Satoshi , Koga Yoshihiro , Okuda Hidehiko , Kurita Kazunari 
Published: February 2020

Abstract
We investigate the amorphous formation behavior on hydrocarbon molecular ion implantation conditions such as hydrocarbon molecular ion size by X-ray photoelectron spectroscopy (XPS). The cross-sectional radius of the amorphous region was obtained from the peak intensity of the amorphous component in Si 2p spectra analyzed by XPS, and using columnar formula for a model. We confirmed that the cross-sectional radius of the amorphous region formed by hydrocarbon molecular ions differs greatly from that formed by monomer carbon ions, and increases by 0.078 nm as the number of carbon atoms composing the hydrocarbon molecular ion increases. The dependence of amorphous formation on the hydrocarbon molecular size is related to the C–C binding distance, and the ratio of increase in the amorphous cross-sectional radius corresponds to half of the C–C binding distance. Therefore, the collision behavior of hydrocarbon molecular ions during implantation predominantly influence the size of hydrocarbon molecular ions.
HUBUNGAN KEBIJAKAN PROGRAM INDONESIA SEHAT DENGAN PENDEKATAN KELUARGA TERHADAP ANGKA KEMATIAN BAYI (AKB) DI KECAMATAN KARANG BARU KABUPATEN ACEH TAMIANG
Authors: Manik Zulfanda 
Published: February 2020

Program Indonesia Sehat merupakan salah satu program yang bertujuan untuk meningkatkan kualitas hidup manusia Indonesia, meningkatkan derajat kesehatan dan status gizi masyarakat melalui upaya kesehatan dan pemberdayaan masyarakat yang didukung dengan perlindungan finansial dan pemerataan pelayanan kesehatan. Tujuan penelitian ini adalah untuk menganalisis hubungan kebijakan program indonesia sehat dengan pendekatan keluarga terhadap angka kematian bayi di Kecamatan Karang Baru Kabupaten Aceh Tamiang. Jenis penelitian ini merupakan survei analitik dengan rancangan cross sectional study. Penelitian dilakukan di Kecamatan Karang Baru Kabupaten Aceh Tamiang dengan sampel 66 ibu yang memiliki balita yang diambil secara simple random sampling. Analisis data digunakan uji chi-square dan regresi logistik. Berdasarkan hasil penelitian diketahui bahwa Angka Kematian Bayi berhubungan dengan keluarga yang mengikuti Keluarga Berencana (p=0,020), ibu melakukan persalinan di fasilitas kesehatan (p=0,024), bayi mendapat imunisasi dasar lengkap (p=0,006),pemanfaatan (ASI) eksklusif (p=0,038), pemantauan pertumbuhan balita (p=0,000).
Kesimpulan diperoleh bahwa faktor yang berhubungan dengan angka kematian bayi adalah keluarga yang mengikuti Keluarga Berencana, ibu melakukan persalinan di fasilitas kesehatan, bayi mendapat imunisasi dasar lengkap, pemanfaatan (ASI) eksklusif, pemantauan pertumbuhan balita. Diharapkan agar dapat menjadi bahan dan masukan dalam pengambilan kebijakan program Indonesia Sehat dengan Pendekatan Keluarga bahwa kesehatan merupakan hak masyarakat.
PENGARUH PENERAPAN PEMBELAJARANVALUE CLARIFICATION TECHNIQUE(VCT) TERHADAP SIKAP DEMOKRASI SISWA KELAS X AK 2 SMK MUHAMMADIYAH 1 GENTENG SEMESTER GANJIL TAHUN PELAJARAN 2017/2018
Authors: Moh. Andris Solahudin  , Yuli kartika effendi  
Published: February 2020

Penelitian ini bertujuan untuk mengetahui peningkatan kemampuan siswa dalam memahami sistem pemerintahan Indonesia pada mata pelajaran PKn melalui model pembelajaran student teams achievement devision (VCT) dan pembelajaran problem solving kelas X Transmisi SMK Muhammadiyah 1 Genteng.
Penelitian ini merupakan penelitian kuantitatif. Subjek penelitian ini adalah siswa kelas X Transmisi Semester ganjil Tahun akademik 2017/2018 dengan jumlah 30 siswa. Teknik pengumpulan data pada penelitian ini menggunakan observasi, interview, tes ketuntasan belajar, dan dokumentasi.Teknik analisis data yang digunakan adalah analisis deskriptif kualitatif.Hasil penelitian menunjukkan bahwa penerapan model pembelajaran) pada mata pelajaran PKn dari hasil perhitungan statistic dapat disimpulkan bahwa Freg = 30,448 ≥ Ftabel 5% = 3,34 . Dengan demikian dapat dikatakan bahwa “Ada Pengaruh Model Pembelajaran Student Teams Achievement Devision (STAD) terhadap Peningkatan Kemampuan Siswa dalam Memahami Sistem Pemerintah Indonesia dalam Pelajaran PKn Kelas X Semester Ganjil SMK Telekomunikasi Genteng 2017/2018”
Social networks and surgery: introduction to the most used social networks in our professional environment.
Authors: Reguera Rosal J , Retamar Gentil M , Marenco de la Cuadra B , Infantes Ormad M , Oliva Mompeán F , López Ruiz J 
Published: February 2020

Resumen

El auge de las redes sociales digitales (RR.SS.) ha cambiado la forma de relacionarse de las personas, y los cirujanos no son una excepción.

Revisamos las principales redes sociales de interés para el uso profesional por parte de los cirujanos, haciendo una breve introducción a las mismas y analizando el uso principal que los profesionales sanitarios hacen de ellas.
Current Population Statistics Do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap
Authors: Loyd R. O. Parke , Shkolnik Evgenya L. , Schneider Adam C. , Richey-Yowell Tyler , Barman Travis S. , Peacock Sarah , Pagano Isabella 
Published: February 2020

Abstract
We search for evidence of the cause of the exoplanet radius gap, i.e., the dearth of planets with radii near 1.8 R
⊕. If the cause were photoevaporation, the radius gap should trend with proxies for the early-life high-energy emission of the planet-hosting stars. If, alternatively, the cause were core-powered mass loss, no such trends should exist. Critically, spurious trends between the radius gap and stellar properties arise from an underlying correlation with instellation. After accounting for this underlying correlation, we find that no trends remain between the radius gap and stellar mass or present-day stellar activity as measured by near-UV emission. We dismiss the nondetection of a radius gap trend with near-UV emission because present-day near-UV emission is unlikely to trace early-life high-energy emission, but we provide a catalog of Galaxy Evolution Explorer near-UV and far-UV emission measurements for general use. We interpret the nondetection of a radius gap trend with stellar mass by simulating photoevaporation with mass-dependent evolution of stellar high-energy emission. The simulation produces an undetectable trend between the radius gap and stellar mass under realistic sources of error. We conclude that no evidence, from this analysis or others in the literature, currently exists that clearly favors either photoevaporation or core-powered mass loss as the primary cause of the exoplanet radius gap. However, repeating this analysis once the body of well-characterized <4 R
⊕ planets has roughly doubled could confirm or rule out photoevaporation.
Globular Cluster Formation from Colliding Substructure
Authors: Madau Piero , Lupi Alessandro , Diemand Jürg , Burkert Andreas , Lin Douglas N. C. 
Published: February 2020

Abstract
We investigate a scenario where the formation of globular clusters (GCs) is triggered by high-speed collisions between infalling atomic-cooling subhalos during the assembly of the main galaxy host, a special dynamical mode of star formation that operates at high gas pressures and is intimately tied to ΛCDM hierarchical galaxy assembly. The proposed mechanism would give origin to “naked” globular clusters as colliding dark matter subhalos and their stars will simply pass through one another while the warm gas within them clashes at highly supersonic speed and decouples from the collisionless component, in a process reminiscent of the Bullet galaxy cluster. We find that the resulting shock-compressed layer cools on a timescale that is typically shorter than the crossing time, first by atomic line emission and then via fine-structure metal-line emission, and is subject to gravitational instability and fragmentation. Through a combination of kinetic theory approximation and high-resolution N-body simulations, we show that this model may produce: (a) a GC number–halo mass relation that is linear down to dwarf galaxy scales and agrees with the trend observed over five orders of magnitude in galaxy mass; (b) a population of old globular clusters with a median age of 12 Gyr and an age spread similar to that observed; (c) a spatial distribution that is biased relative to the overall mass profile of the host; and (d) a bimodal metallicity distribution with a spread similar to that observed in massive galaxies.
Repeated State Change of Variable Gamma-Ray Pulsar PSR J2021+4026
Authors: Takata J. , Wang H. H. , Lin L. C. C. , Hu C.-P. , Hui C. Y. , Kong A. K. H. , Tam P. H. T. , Li K. L. , Cheng K. S. 
Published: February 2020

Abstract
PSR J2021+4026 is a radio-quiet gamma-ray pulsar and the first pulsar that shows state change of the gamma-ray emission and spindown rate. The state change of PSR J2021+4026 was first observed at 2011 October, at which the pulsar changes the state from high gamma-ray flux/low spindown rate state to low gamma-ray flux/high spindown rate state. In 2014 December, PSR J2021+4026 recovered the state before the 2011 state change over a timescale of a few months. We report that the long-term evolution of the gamma-ray flux and timing behavior suggests that PSR J2021+4026 changed the state near 2018 February 1 and entered a new low gamma-ray flux/high spindown rate state. At the 2018 state change, the averaged flux dropped from (1.29 ± 0.01) × 10−6 cts cm−2 s−1 to (1.12 ± 0.01) × 10−6 cts cm−2 s−1, which is behavior similar to that of the 2011 event. The spindown rate has increased by ∼3% in the new state since the 2018 state change. The shapes of pulse profile and spectrum in GeV bands also changed at the 2018 event, and they are consistent with behavior at the 2011 state change. Our results probably suggest that PSR J2021+4026 is switching between different states with a timescale of several years, like some radio pulsars (e.g., PSR B1828-11). PSR J2021+4026 will provide a unique opportunity to study the mechanism of the state switching.
Detection of Late-time Optical Emission from SN 1941C in NGC 4136
Authors: Fesen Robert A. , Weil Kathryn E. 
Published: February 2020

Abstract
We report the detection of broad, high-velocity oxygen emission lines from the site of SN 1941C nearly eight decades after outburst, making it the oldest optically detected historical core-collapse supernova (CCSN) and one of the youngest CCSN remnants with a well determined age. In contrast to the strongly blueshifted emission line profiles observed for other late-time CCSNe thought to be due to internal dust extinction of far-side hemisphere of expanding ejecta, SN 1941C’s spectrum exhibits stronger redshifted than blueshifted emissions of [O i] 6300, 6364 Å, [O ii] 7319, 7330 Å, and [O iii] 4959, 5007 Å. These oxygen emissions exhibit rest-frame expansion velocities from −2200 to

. No other significant broad line emissions were detected including Hα emission. We discuss possible causes for this unusual spectrum and compare SN 1941C’s optical and X-ray luminosities to other evolved CCSNe.
Predicting Coronal Mass Ejections Using SDO/HMI Vector Magnetic Data Products and Recurrent Neural Networks
Authors: Liu Hao , Liu Chang , Wang Jason T. L. , Wang Haimin 
Published: February 2020

Abstract
We present two recurrent neural networks (RNNs), one based on gated recurrent units and the other based on long short-term memory, for predicting whether an active region (AR) that produces an M- or X-class flare will also produce a coronal mass ejection (CME). We model data samples in an AR as time series and use the RNNs to capture temporal information on the data samples. Each data sample has 18 physical parameters, or features, derived from photospheric vector magnetic field data taken by the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory. We survey M- and X-class flares that occurred from 2010 to 2019 May using the Geostationary Operational Environmental Satellite's X-ray flare catalogs provided by the National Centers for Environmental Information (NCEI), and select those flares with identified ARs in the NCEI catalogs. In addition, we extract the associations of flares and CMEs from the Space Weather Database of Notifications, Knowledge, Information. We use the information gathered above to build the labels (positive versus negative) of the data samples at hand. Experimental results demonstrate the superiority of our RNNs over closely related machine learning methods in predicting the labels of the data samples. We also discuss an extension of our approach to predict a probabilistic estimate of how likely an M- or X-class flare is to initiate a CME, with good performance results. To our knowledge this is the first time that RNNs have been used for CME prediction.
Limits on Mode Coherence in Pulsating DA White Dwarfs Due to a Nonstatic Convection Zone
Authors: Montgomery M. H. , Hermes J. J. , Winget D. E. , Dunlap B. H. , Bell K. J. 
Published: February 2020

Abstract
The standard theory of pulsations deals with the frequencies and growth rates of infinitesimal perturbations in a stellar model. Modes that are calculated to be linearly driven should increase their amplitudes exponentially with time; the fact that nearly constant amplitudes are usually observed is evidence that nonlinear mechanisms inhibit the growth of finite-amplitude pulsations. Models predict that the mass of convection zones in pulsating hydrogen-atmosphere (DAV) white dwarfs is very sensitive to temperature (i.e.,

), leading to the possibility that even low-amplitude pulsators may experience significant nonlinear effects. In particular, the outer turning point of finite-amplitude g-mode pulsations can vary with the local surface temperature, producing a reflected wave that is out of phase with what is required for a standing wave. This can lead to a lack of coherence of the mode and a reduction in its global amplitude. In this paper we show that (1) whether a mode is calculated to propagate to the base of the convection zone is an accurate predictor of its width in the Fourier spectrum, (2) the phase shifts produced by reflection from the outer turning point are large enough to produce significant damping, and (3) amplitudes and periods are predicted to increase from the blue edge to the middle of the instability strip, and subsequently decrease as the red edge is approached. This amplitude decrease is in agreement with the observational data while the period decrease has not yet been systematically studied.