bluuebunny/crossref_metadata_2025_split huggingface dataset:
KAJIAN IDENTIFIKASI INFRASTRUKTUR JARINGAN PIPA MIGAS BAWAH LAUT DI PERAIRAN SEBELAH UTARA PROVINSI BANTEN
Authors: Rachmat Beben , Purwanto Catur , Raharjo Purnomo 
Published: October 2018

Keberadaan fasilitas infrastruktur pipa migas bawah laut di perairan utara Banten berkembang cukup pesat seiring dengan berkembangnya kegiatan industri yang berada di kawasan Propinsi Banten, DKI Jakarta dan Jawa Barat. Mengingat kondisi lingkungan di sekitar perairan utara Banten cukup komplek, seperti adanya jalur sesar/patahan, seismisitas kegempaan yang cukup aktif, morfologi dasar laut yang tidak rata, keberadaan jaringan kabel bawah laut, kondisi hidrooseanografi yang cukup dinamis, kegiatan pelayaran yang sangat padat dan adanya kegiatan nelayan, menyebabkan potensi resiko untuk terjadinya kegagalan struktur pada jaringan pipa yang digelar di perairan utara Banten cukup besar. Potensi resiko lainnya adalah terkait dengan penggelaran pipa yang tidak sesuai dengan aturan standar dan aturan perundangan yang berlaku. Pipa-pipa ini perlu ditertibkan karena posisi pipa-pipa ini sangat rawan untuk terjadinya kegagalan struktur. Beberapa potensi kegagalan struktur pada pipa migas bawah laut di perairan ini yang mungkin terjadi diantaranya adalah pipa tertimpa jangkar kapal, terseret jangkar kapal, terjadi bentang bebas (freespan), kegagalan akibat lelah (patigue) terjadi pembengkokan (buckling) dan terjadi pergeseran posisi pipa baik lateral maupun vertikal. Oleh karena itu perlu dilakukannya pengawasan terhadap keberadaan pipa migas bawah laut ini yang sesuai dengan aturan standar dan aturan perundangan yang berlaku. Kata kunci : jaringan, pipa, infrastruktur, aturan, penggelaran The existence of gas pipeline on the sea bottom in the waters north of Banten has been developped rapidly in the course of the development activities located in the Provinces of Banten, Jakarta and West Java. The environmental conditions in waters arround the northen Jakarta are quite complex, such as the presence of fault zone, active seismicity, the morphology of the seabed is not flat, existence of submarine cable network, hydro-oceanography dynamic, highly dense shipping activity and the presence of fishing activity. These will cause the high potential risk for the occurence of structural failure in the pipeline that was held in the waters north of Banten. Another potential risk is associated with the pipeline deployment that is not in accordance with standard rules and regulations. These pipes need to be organized the right position because they are very prone to the structural failure. Some of the potential failure of the structure on oil and gas pipelines under the sea that may occur include crushed pipe anchor, dragged anchors, free spans, failure due to fatique occurred by bending and shifting in the position of the pipes either laterally or vertically. Therefore it is necessary for controlling the existence of oil and gas pipelines under the sea in accordance with standard rules and regulations. Keywords: networks, pipelines, infrastructure, rules, deploying
AKUMULASI TAILING DASAR LAUT DI PERAIRAN TELUK SENUNU DAN SEKITARNYA, SUMBAWA BARAT
Authors: Noviadi Yogi , Astjario Prijantono 
Published: October 2018

Teluk Senunu terletak di pantai selatan Kabupaten Sumbawa Barat, Provinsi Nusa Tenggara Barat. Daerah ini merupakan kawasan pembuangan tailing dari PT Newmont Nusa Tenggara (NNT). Hasil pemeruman di lokasi penyelidikan di sekitar alur pipa tailing memperlihatkan kedalaman dasar laut di sekitar Teluk Senunu bervariasi, pada kedalaman 0 sampai dengan 100 meter dijumpai pada jarak sekitar 3 - 3,25 km dari garis pantai. Keberadaan pipa tailing terluar berada pada kedalaman sekitar 120 meter dari permukaan dasar laut, dan posisi penempatan tailing ini terletak di kawasan Ngarai dengan kedalaman lebih dari 125 meter. Berdasarkan hasil penafsiran data Side Scan Sonar dijumpai adanya 3 jalur pipa tailing yang berada di permukaan dasar laut dengan penyebaran tailing secara lateral melebar sepanjang 1,5 km sejajar dengan tebing Ngarai Senunu. Kata kunci : tailing, Teluk Senunu, Rekaman Seismik, Side scan sonar Senunu bay is located on the southern coast of West Sumbawa Regency, West Nusa Tenggara. This area is a tailings disposal area of the ??PT Newmont Nusa Tenggara (NNT). Results of sounding around the tailing pipe shows the depth of the seafloor around the Senunu bay vary, at a depth of 0 to 100 meters was found at a distance of about 3 to 3.25 km from the coastline. The outer pipe of tailings located at a depth of 120 meters from the sealevel, and tailings placement position is located in the gap with a depth of more than 125 meters. Based on the results of Side Scan Sonar data interpretation, the 3 pipelines of tailings on the sea floor with spread laterally along the 1.5 km wide parallel to the canyon cliffs of Senunu. Key words : tailing, Teluk Senunu, Seismic Record, Side scan sonar
Statistical Study of the Swift X-Ray Flash and X-Ray Rich Gamma-Ray Bursts
Authors: Bi Xiongwei , Mao Jirong , Liu Chuanxi , Bai Jin-Ming 
Published: October 2018

Abstract
We build a comprehensive sample to statistically describe the properties of X-ray flashes (XRFs) and X-ray riches (XRRs) from the third Swift Burst Alert Telescope (BAT3) catalog of Gamma-ray bursts (GRBs). We obtain 81 XRFs, 540 XRRs, and 394 classical GRBs (C-GRBs). We statistically explore the different properties of the γ-ray prompt emission, the X-ray emission, the X-ray light-curve type, the association with supernovae (SNe), and the host galaxy properties for these sources. We confirm that most XRFs/XRRs are long GRBs with low values of peak energy

and they are low-luminosity GRBs. XRFs, XRRs, and C-GRBs follow the same E

X,iso–E

γ,iso–E
peak,z
correlations. Compared to the classical GRBs, XRFs are favorable to have the association with SN explosions. We do not find any significant differences of redshift distribution and host galaxy properties among XRFs, XRRs, and C-GRBs. We also discuss some observational biases and selection effects that may affect our statistical results. The GRB detectors with wide energy range and low energy threshold are expected for the XRF/XRR research in the future.
Rotational Quenching of HD in Collisions with H2: Resolving Discrepancies for Low-lying Rotational Transitions
Authors: Balakrishnan N. , Croft J. F. E. , Yang B. H. , Forrey R. C. , Stancil P. C. 
Published: October 2018

Abstract
The deuterated hydrogen molecule HD has been observed in a variety of cool molecular astrophysical environments. By virtue of its small dipole moment the HD molecule is believed to have played an important role in the cooling of the primordial gas in the formation of the first stars and galaxies. HD has also recently been proposed as a tracer of molecular hydrogen in protoplanetary disk evolution, providing a diagnostic for the total disk mass. Here we report benchmark computations of rotational quenching rate coefficients for HD in collisions with H2 based on quantum coupled channel methods within the rigid rotor model, and validate them against full-dimensional rovibrational scattering formalism. It is found that the rigid rotor model yields accurate rate coeffiicents for rotational transitions in HD+H2 collisions at astrophysically relevant kinetic temperatures. Results are reported using the most recent highly accurate interaction potentials for the H2–H2 system. We obtain excellent agreement with previous results of Schaefer for the most important Δj = ±1, ±2 transitions in HD induced by ortho- and para-H2, but find significant differences with recent results of Sultanov et al. that employed the same interaction potential as the one adopted here.
Betatron Cooling of Suprathermal Electrons in the Terrestrial Magnetotail
Authors: Liu C. M. , Liu Y. Y. , Xu Y. , Zhao M. J. 
Published: October 2018

Abstract
The cigar distribution of suprathermal electrons (40–200 keV), showing electron pitch angles primarily in the parallel and anti-parallel directions, has been frequently observed in the terrestrial magnetotail. The formation of such a distribution is typically attributed to Fermi acceleration, betatron cooling, or a combination of these. To date, Fermi acceleration has been well studied via both observations and simulations, while betatron cooling has not been verified directly. In this study, we focus on the betatron cooling of suprathermal electrons. By analyzing a unique case observed by the Cluster spacecraft in the Earth's magnetotail (X
GSM ≈ −15 R

E
), we find a significant drop of electron flux in association with the decrease of magnetic field strength, i.e., a magnetic dip. This magnetic dip is formed due to the expansion of flux tubes driven by two opposite flows. The drop in electron flux, primarily in the perpendicular direction, is therefore strong evidence of betatron cooling. We successfully reproduce these processes using an analytical model.
SMASHing the LMC: A Tidally Induced Warp in the Outer LMC and a Large-scale Reddening Map
Authors: Choi Yumi , Nidever David L. , Olsen Knut , Blum Robert D. , Besla Gurtina , Zaritsky Dennis , van der Marel Roeland P. , Bell Eric F. , Gallart Carme , Cioni Maria-Rosa L. , Clifton Johnson L. , Katherina Vivas A. , Saha Abhijit , de Boer Thomas J. L. , Noël Noelia E. D. , Monachesi Antonela , Massana Pol , Conn Blair C. , Martinez-Delgado David , Muñoz Ricardo R. , Stringfellow Guy S. 
Published: October 2018

Abstract
We present a study of the three-dimensional (3D) structure of the Large Magellanic Cloud (LMC) using ∼2.2 million red clump (RC) stars selected from the Survey of the MAgellanic Stellar History. To correct for line-of-sight dust extinction, the intrinsic RC color and magnitude and their radial dependence are carefully measured by using internal nearly dust-free regions. These are then used to construct an accurate 2D reddening map (165 deg2 area with ∼10′ resolution) of the LMC disk and the 3D spatial distribution of RC stars. An inclined disk model is fit to the 2D distance map, yielding a best-fit inclination angle

degrees with random errors of ±0.°19 and line-of-nodes position angle

degrees with random errors of ±0.°49. These angles vary with galactic radius, indicating that the LMC disk is warped and twisted likely due to the repeated tidal interactions with the Small Magellanic Cloud (SMC). For the first time, our data reveal a significant warp in the southwestern part of the outer disk starting at ρ ∼ 7° that departs from the defined LMC plane up to ∼4 kpc toward the SMC, suggesting that it originated from a strong interaction with the SMC. In addition, the inner disk encompassing the off-centered bar appears to be tilted up to 5°–15° relative to the rest of the LMC disk. These findings on the outer warp and the tilted bar are consistent with the predictions from the Besla et al. simulation of a recent direct collision with the SMC.
On the Weak Field Approximation for Ca 8542 Å
Authors: Centeno Rebecca 
Published: October 2018

Abstract
The weak field approximation (WFA) is a conceptually simple and computationally light method for inferring the magnetic field strength and its orientation in the Sun’s atmosphere. In this work, we study the validity and limitations of this tool when applied to full Stokes Ca ii 8542 Å profiles to extract information about the chromospheric magnetic field. We find that the range of validity of the WFA depends, among other things, on the component of the magnetic field that one is trying to infer. The retrieval of the line-of-sight component of the chromospheric magnetic field from the core of the spectral line is reliable for field strengths up to ∼1200 G, even when moderate velocity gradients are present. The horizontal component, on the other hand, is suitably derived using the wing–core boundary of the spectral line, but typically yields systematic errors of

. The effects of scattering polarization further compound the problem by rendering the transverse field inference problematic in quiet Sun areas, and for observing geometries within 30◦ of the limb. Magneto-optical effects disproportionately challenge the determination of the magnetic field azimuth in the transverse plane, leading to errors of

. Typical noise levels of

relative to the continuum intensity preclude the accurate retrieval of the transverse field strength and its azimuth below a threshold of a few hundred Gauss. Striving for a noise level of

significantly improves the diagnostic capability of the WFA with this spectral line, at which point the magnetic field inference becomes limited by systematic errors.
Dust Motions in Magnetized Turbulence: Source of Chemical Complexity
Authors: Cassone Giuseppe , Saija Franz , Sponer Jiri , Sponer Judit E. , Ferus Martin , Krus Miroslav , Ciaravella Angela , Jiménez-Escobar Antonio , Cecchi-Pestellini Cesare 
Published: October 2018

Abstract
In addition to the manufacture of complex organic molecules from impacting cometary and icy planet surface analogs, which is well-established, dust grain–grain collisions driven by turbulence in interstellar or circumstellar regions may represent a parallel chemical route toward the shock synthesis of prebiotically relevant species. Here we report on a study, based on the multi-scale shock-compression technique combined with ab initio molecular dynamics approaches, where the shock-wave-driven chemistry of mutually colliding isocyanic acid (HNCO) containing icy grains has been simulated by first principles. At the shock-wave velocity threshold triggering the chemical transformation of the sample (7 km s−1), formamide is the first synthesized species, thus being the springboard for the further complexification of the system. Also, upon increasing the shock impact velocity, formamide is formed in progressively larger amounts. More interestingly, at the highest velocity considered (10 km s−1), impacts drive the production of diverse carbon–carbon bonded species. In addition to glycine, the building block of alanine (i.e., ethanimine) and one of the major components of a plethora of amino acids including, e.g., asparagine, cysteine, and leucine (i.e., vinylamine), have been detected after shock compression of samples containing the most widespread molecule in the universe (H2) and the simplest compound bearing all of the primary biogenic elements (HNCO). The present results indicate novel chemical pathways toward the chemical complexity typical of interstellar and circumstellar regions.
L’après-séparation ou les limites de la voie judiciaire dans la poursuite de la coparentalité
Authors: Stock Carine Vander 
Published: October 2018

La sollicitation de la justice en cas de divorce litigieux est fréquente.	L’auteur, juriste, souligne que cependant, le cadre judiciaire ne permet pas toujours de tenir compte de la complexité des liens déterriorés entre les partenaires d’un couple. Parfois même, il risque d’amplifier les tensions.	Insistant sur l’importance de préserver les enfants d’un couple en guerre, elle décrit une forme de justice participative, récemment mise sur pied et mieux adaptée à ce type de situation.
Les compétences pour négocier l’organisation du travail : le cas d’un projet industriel d’automatisation
Authors: Lecoester Agathe , Gaillard Irène , Forrierre Justine , Six Francis 
Published: October 2018

Notre recherche-intervention repose sur un projet d’automatisation d’un secteur de production d’une entreprise sidérurgique couplée à une réduction des effectifs. Nous avons cherché à comprendre comment, dans ce cadre, le groupe de travail, constitué d’encadrants, d’opérateurs et d’un ergonome, est parvenu à concevoir et à négocier une organisation du travail adaptée. L’analyse des échanges au sein de ce groupe montre que les connaissances du terrain des participants et celles apportées par l’ergonome sur l’organisation du travail et l’activité de travail sont à la base des choix organisationnels effectués. Plus précisément, les compétences actuelles et futures des opérateurs, considérées tour à tour du point de vue de l’activité et du point de vue des ressources humaines, tiennent un rôle pivot pour construire un accord sur les choix organisationnels. Ce constat montre que le point de vue de l’activité des opérateurs, associé à une méthodologie ergonomique aidant à l’intégrer dans les processus de conception, permet des choix organisationnels ; ces derniers tiennent compte des besoins de l’activité de travail là où les choix d’automatisation semblaient initialement uniquement techno-centrés.
The Variety of Two-dimensional Algebras Over an Algebraically Closed Field
Authors: Kaygorodov Ivan , Volkov Yury 
Published: October 2018

AbstractThe work is devoted to the variety of two-dimensional algebras over algebraically closed fields. First we classify such algebras modulo isomorphism. Then we describe the degenerations and the closures of certain algebra series in the variety of two-dimensional algebras. Finally, we apply our results to obtain analogous descriptions for the subvarieties of flexible and bicommutative algebras. In particular, we describe rigid algebras and irreducible components for these subvarieties.
Within-Session Practice Effects in the Jebsen Hand Function Test (JHFT)
Authors: Schaefer Sydney Y. , Saba Ashley , Baird Jessica F. , Kolar Melissa B. , Duff Kevin , Stewart Jill C. 
Published: October 2018

Abstract
The Jebsen Hand Function Test (JHFT) is a standardized assessment that has been used as a clinical outcome measure. To appropriately interpret the effects of an intervention on hand function (as measured by the JHFT), the extent to which this instrument shows significant practice effects must be quantified. The purpose of this study was to determine whether the JHFT is susceptible to within-session practice effects. The results showed that the dominant and nondominant hands significantly improved on the JHFT and many of its subtests over six consecutive trials. Although practice effects might complicate the interpretation of change due to intervention, we briefly relate our findings to emerging neuropsychological evidence that practice effects may indicate a person’s motor learning potential or treatment responsiveness.
A new model of meteoric calcium in the mesosphere and lower thermosphere
Authors: Plane John M. C. , Feng Wuhu , Gómez Martín Juan Carlos , Gerding Michael , Raizada Shikha 
Published: October 2018

Abstract. Meteoric ablation produces layers of metal atoms in the
mesosphere and lower thermosphere (MLT). It has been known for more than 30 years that the Ca atom layer is depleted by over 2 orders of magnitude
compared with Na, despite these elements having nearly the same
elemental abundance in chondritic meteorites. In contrast, the Ca+ ion
abundance is depleted by less than a factor of 10. To explain these
observations, a large database of neutral and ion–molecule reaction
kinetics of Ca species, measured over the past decade, was incorporated into
the Whole Atmosphere Community Climate Model (WACCM). A new meteoric input
function for Ca and Na, derived using a chemical ablation model that has
been tested experimentally with a Meteoric Ablation Simulator, shows that Ca
ablates almost 1 order of magnitude less efficiently than Na. WACCM-Ca
simulates the seasonal Ca layer satisfactorily when compared with lidar
observations, but tends to overestimate Ca+ measurements made by rocket
mass spectrometry and lidar. A key finding is that CaOH and CaCO3 are
very stable reservoir species because they are involved in essentially
closed reaction cycles with O2 and O. This has been demonstrated
experimentally for CaOH, and in this study for CaCO3 using electronic
structure and statistical rate theory. Most of the neutral Ca is therefore
locked in these reservoirs, enabling rapid loss through polymerization into
meteoric smoke particles, and this explains the extreme depletion of Ca.
A global compilation of coccolithophore calcification rates
Authors: Daniels Chris J. , Poulton Alex J. , Balch William M. , Marañón Emilio , Adey Tim , Bowler Bruce C. , Cermeño Pedro , Charalampopoulou Anastasia , Crawford David W. , Drapeau Dave , Feng Yuanyuan , Fernández Ana , Fernández Emilio , Fragoso Glaucia M. , González Natalia , Graziano Lisa M. , Heslop Rachel , Holligan Patrick M. , Hopkins Jason , Huete-Ortega María , Hutchins David A. , Lam Phoebe J. , Lipsen Michael S. , López-Sandoval Daffne C. , Loucaides Socratis , Marchetti Adrian , Mayers Kyle M. J. , Rees Andrew P. , Sobrino Cristina , Tynan Eithne , Tyrrell Toby 
Published: October 2018

Abstract. The biological production of calcium carbonate (CaCO3), a process termed calcification, is a key term in the marine carbon cycle. A major planktonic group responsible for such pelagic CaCO3 production (CP) is the coccolithophores, single-celled haptophytes that inhabit the euphotic zone of the ocean. Satellite-based estimates of areal CP are limited to surface waters and open-ocean areas, with current algorithms utilising the unique optical properties of the cosmopolitan bloom-forming species Emiliania huxleyi, whereas little understanding of deep-water ecology, optical properties or environmental responses by species other than E. huxleyi is currently available to parameterise algorithms or models. To aid future areal estimations and validate future modelling efforts we have constructed a database of 2765 CP measurements, the majority of which were measured using 12 to 24 h incorporation of radioactive carbon (14C) into acid-labile inorganic carbon (CaCO3). We present data collated from over 30 studies covering the period from 1991 to 2015, sampling the Atlantic, Pacific, Indian, Arctic and Southern oceans. Globally, CP in surface waters ( < 20 m) ranged from 0.01 to 8398 µmol C m−3 d−1 (with a geometric mean of 16.1 µmol C m−3 d−1). An integral value for the upper euphotic zone (herein surface to the depth of 1 % surface irradiance) ranged from  < 0.1 to 6 mmol C m−2 d−1 (geometric mean 1.19 mmol C m−2 d−1). The full database is available for download from PANGAEA at https://doi.org/10.1594/PANGAEA.888182.
Evaluating simplified chemical mechanisms within present-day simulations of the Community Earth System Model version 1.2 with CAM4 (CESM1.2 CAM-chem): MOZART-4 vs. Reduced Hydrocarbon vs. Super-Fast chemistry
Authors: Brown-Steiner Benjamin , Selin Noelle E. , Prinn Ronald , Tilmes Simone , Emmons Louisa , Lamarque Jean-François , Cameron-Smith Philip 
Published: October 2018

Abstract. While state-of-the-art complex chemical mechanisms expand our understanding
of atmospheric chemistry, their sheer size and computational requirements
often limit simulations to short lengths or ensembles to only a few members.
Here we present and compare three 25-year present-day offline simulations
with chemical mechanisms of different levels of complexity using the
Community Earth System Model (CESM) Version 1.2 CAM-chem (CAM4): the Model
for Ozone and Related Chemical Tracers, version 4 (MOZART-4) mechanism, the
Reduced Hydrocarbon mechanism, and the Super-Fast mechanism. We show that,
for most regions and time periods, differences in simulated ozone chemistry
between these three mechanisms are smaller than the model–observation
differences themselves. The MOZART-4 mechanism and the Reduced Hydrocarbon
are in close agreement in their representation of ozone throughout the
troposphere during all time periods (annual, seasonal, and diurnal). While
the Super-Fast mechanism tends to have higher simulated ozone variability and
differs from the MOZART-4 mechanism over regions of high biogenic emissions,
it is surprisingly capable of simulating ozone adequately given its
simplicity. We explore the trade-offs between chemical mechanism complexity
and computational cost by identifying regions where the simpler mechanisms
are comparable to the MOZART-4 mechanism and regions where they are not. The
Super-Fast mechanism is 3 times as fast as the MOZART-4 mechanism, which
allows for longer simulations or ensembles with more members that may not be
feasible with the MOZART-4 mechanism given limited computational resources.