bluuebunny/crossref_metadata_2025_split huggingface dataset:
SAPI PERAH: MASALAH DAN SOLUSI PENINGKATAN PRODUKSI SUSU (KASUS DI KELOMPOK TANI SEPAKAT II, DESA MOJOREJO, KABUPATEN REJANG LEBONG)
Authors: Efendi Zul , Ishak Andi , Wulandari Wahyuni A , Afrizon Afrizon 
Published: June 2020

This research was conducted in April to August 2019 at the Sepakat II Livestock Group, Mojorejo Village, Sindang Kelingi District, Rejang Lebong District. The purpose of this research is to analyze the problems and solutions to increase milk production in dairy cows in the Sepakat II farmer group in Mojorejo Village, Sindang Kelingi District, Rejang Lebong Regency. Data collected in the form of technical, economic and management data for dairy cattle maintenance. Technical and economic data, i.e. types, sources, nutrition, and feed costs. Data about the type and source of feed were obtained by means of individual interviews and FGDs. Nutrient content was obtained through laboratory analysis at the University of Bengkulu Animal Husbandry Laboratory. Feed management data is in the form of problem analysis and problem solving solutions collected through individual interviews. Data were analyzed descriptively and using problem tree analysis and AHP (Analitycal Hierarchy Process). The results obtained that the priority of technological innovation in the context of increasing milk production in dairy cows in the Sepakat II Farmers Group are the utilization of location-specific alternative concentrates (63.7%), superior grass planting (25.8%) and extension technology for dairy farming (10, 5%).
Keywords: Problems, Solutions, Increase, Milk Production, Dairy Cows.
Spectroscopic Orbits of 11 Nearby, Mid-to-late M-dwarf Binaries
Authors: Winters Jennifer G. , Irwin Jonathan M. , Charbonneau David , Latham David W. , Medina Amber M. , Mink Jessica , Esquerdo Gilbert A. , Berlind Perry , Calkins Michael L. , Berta-Thompson Zachory K. 
Published: June 2020

Abstract
We present the spectroscopic orbits of 11 nearby, mid-to-late M dwarf binary systems in a variety of configurations: 2 single-lined binaries (SB1s), 7 double-lined binaries (SB2s), 1 double-lined triple (ST2), and 1 triple-lined triple (ST3). Eight of these orbits are the first published for these systems, while five are newly identified multiples. We obtained multi-epoch, high-resolution spectra with the TRES instrument on the 1.5 m Tillinghast Reflector at the Fred Lawrence Whipple Observatory located on Mt. Hopkins in AZ. Using the TiO molecular bands at 7065−7165 Å, we calculated radial velocities for these systems, from which we derived their orbits. We find LHS 1817 to have in a 7 hr period a companion that is likely a white dwarf, due to the ellipsoidal modulation we see in our MEarth-North light-curve data. We find G 123-45 and LTT 11586 to host companions with minimum masses of 41 M
Jup and 44 M
Jup with orbital periods of 35 and 15 days, respectively. We find 2MA 0930+0227 to have a rapidly rotating stellar companion in a 917 day orbital period. GJ 268, GJ 1029, LP 734-34, GJ 1182, G 258-17, and LTT 7077are SB2s with stellar companions with orbital periods of 10, 96, 34, 154, 5, and 84 days; LP 655-43 is an ST3 with one companion in an 18 day orbital period and an outer component in a longer undetermined period. In addition, we present radial velocities for both components of L 870-44AB and for the outer components of LTT 11586 and LP 655-43.
Individual Estimates of the Virial Factor in 10 Quasars: Implications on the Kinematics of the Broad-line Region
Authors: Mediavilla E. , Jiménez-vicente J. , Mejía-restrepo J. , Motta V. , Falco E. , Muñoz J. A. , Fian C. , Guerras E. 
Published: June 2020

Abstract
Assuming a gravitational origin for the Fe iii
λλ2039-2113 redshift and using microlensing based estimates of the size of the region emitting this feature, we obtain individual measurements of the virial factor, f, in 10 quasars. The average values for the Balmer lines,

and

, are in good agreement with the results of previous studies for objects with lines of comparable widths. In the case of Mg ii, consistent results,

, can be also obtained accepting a reasonable scaling for the size of the emitting region. The modeling of the cumulative histograms of individual measurements, CDF(f), indicates a relatively high value for the ratio between isotropic and cylindrical motions,

. On the contrary, we find very large values of the virial factor associated to the Fe iii
λλ2039-2113 blend,

, which can be explained if this feature arises from a flattened nearly face-on structure, similar to the accretion disk.
Carbon–Oxygen Classical Novae Are Galactic 7Li Producers as well as Potential Supernova Ia Progenitors
Authors: Starrfield Sumner , Bose Maitrayee , Iliadis Christian , Hix W. Raphael , Woodward Charles E. , Wagner R. Mark 
Published: June 2020

Abstract
We report on studies of classical nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on carbon–oxygen (CO) white dwarfs (WDs). We vary both the mass of the WD (from 0.6 M
⊙ to 1.35 M
⊙) and the composition of the accreted material. Our simulations are guided by the results of multidimensional studies of TNRs in WDs, which find that sufficient mixing with WD core material occurs after the TNR is well underway, and levels of enrichment are reached that agree with observations of CN ejecta abundances. We use NOVA (our one-dimensional hydrodynamic code) to accrete solar matter until the TNR is ongoing and then switch to a mixed composition (either 25% WD material and 75% solar or 50% WD material and 50% solar). Because the amount of accreted material is inversely proportional to the initial 12C abundance, by first accreting solar matter the amount of material taking part in the outburst is larger than in those simulations where we assume a mixed composition from the beginning. Our results show large enrichments of 7Be in the ejected gases, implying that CO CNe may be responsible for a significant fraction (∼100 M
⊙) of the 7Li in the galaxy (∼1000 M
⊙). Although the ejected gases are enriched in WD material, the WDs in these simulations eject less material than they accrete. We predict that the WD is growing in mass as a consequence of the accretion–outburst–accretion cycle, and CO CNe may be an important channel for SN Ia progenitors.
GASP XXVII: Gas-phase Metallicity Scaling Relations in Disk Galaxies with and without Ram Pressure Stripping
Authors: Franchetto Andrea , Vulcani Benedetta , Poggianti Bianca M. , Gullieuszik Marco , Mingozzi Matilde , Moretti Alessia , Tomičić Neven , Fritz Jacopo , Bettoni Daniela , Jaffé Yara L. 
Published: June 2020

Abstract
Exploiting the data from the GAs Stripping Phenomena in galaxies with MUSE (GASP) survey, we study the gas-phase metallicity scaling relations of a sample of 29 cluster galaxies undergoing ram pressure stripping and of a reference sample of (16 cluster and 16 field) galaxies with no significant signs of gas disturbance. We adopt the pyqz code to infer the mean gas metallicity at the effective radius and achieve a well-defined mass–metallicity relation (MZR) in the stellar mass range

with a scatter of 0.12 dex. At any given mass, reference cluster and stripping galaxies have similar metallicities, while the field galaxies with M
⋆ < 1010.25
M
⊙ show on average lower gas metallicity than galaxies in clusters. Our results indicate that at the effective radius, the chemical properties of the stripping galaxies are independent of the ram pressure stripping mechanism. Nonetheless, at the lowest masses, we detect four stripping galaxies well above the common MZR that suggest a more complex scenario. Overall, we find signs of an anticorrelation between the metallicity and both the star formation rate and the galaxy size, in agreement with previous studies. No significant trends are instead found with the halo mass, clustercentric distance, and local galaxy density in clusters. In conclusion, we advise a more detailed analysis of the spatially resolved gas metallicity maps of the galaxies, able to highlight effects of gas redistribution inside the disk due to ram pressure stripping.
Extrapolation of Three-dimensional Magnetic Field Structure in Flare-productive Active Regions with Different Initial Conditions
Authors: Kawabata Y. , Inoue S. , Shimizu T. 
Published: June 2020

Abstract
Nonlinear force-free field (NLFFF) modeling has been extensively used as a tool to infer three-dimensional (3D) magnetic field structure. In this study, the dependency of the NLFFF calculation with respect to the initial guess of the 3D magnetic field is investigated. While major parts of the previous studies used the potential field as the initial guess in NLFFF modeling, we adopt linear force-free fields with different constant force-free alpha as the initial guesses. This method enables us to investigate the uniqueness of the magnetic field obtained by the NLFFF extrapolation with respect to the initial guess. The dependence of the initial conditions on NLFFF extrapolation is smaller in the strong magnetic field region. Therefore, the magnetic field at lower heights (<10 Mm) tends to be less affected by the initial conditions (correlation coefficient C > 0.9 with different initial conditions); although, the Lorentz force is concentrated at lower heights.
Correlations between Black Holes and Host Galaxies in the Illustris and IllustrisTNG Simulations
Authors: Li Yuan , Habouzit Melanie , Genel Shy , Somerville Rachel , Terrazas Bryan A. , Bell Eric F. , Pillepich Annalisa , Nelson Dylan , Weinberger Rainer , Rodriguez-Gomez Vicente , Ma Chung-Pei , Pakmor Ruediger , Hernquist Lars , Vogelsberger Mark 
Published: June 2020

Abstract
We study black hole–host galaxy correlations, and the relation between the overmassiveness (the distance from the average M
BH–σ relation) of supermassive black holes (SMBHs) and the star formation histories of their host galaxies in the Illustris and TNG100 simulations. We find that both simulations are able to produce black hole scaling relations in general agreement with observations at z = 0, but with noticeable discrepancies. Both simulations show an offset from the observations for the M
BH–σ relation, and the relation between M
BH and the Sérsic index. The relation between M
BH and stellar mass M
* is tighter than the observations, especially for TNG100. For massive galaxies in both simulations, the hosts of overmassive SMBHs (those above the mean M
BH–σ relation) tend to have larger Sérsic indices and lower baryon conversion efficiency, suggesting a multidimensional link between SMBHs and the properties of their hosts. In Illustris, the hosts of overmassive SMBHs have formed earlier and have lower present-day star formation rates, in qualitative agreement with the observations for massive galaxies with σ > 100 km s−1. For low-mass galaxies, such a correlation still holds in Illustris but does not exist in the observed data. For TNG100, the correlation between SMBH overmassiveness and star formation history is much weaker. The hosts of overmassive SMBHs generally have consistently larger star formation rates throughout history. These galaxies have higher stellar mass as well, due to the strong M
BH–M
* correlation. Our findings show that simulated SMBH scaling relations and correlations are sensitive to features in the modeling of SMBHs.
Star Formation in Massive Galaxies at Redshift z ∼ 0.5
Authors: Xu Kun , Liu Chengze , Jing Yipeng , Wang Yunchong , Lu Shengdong 
Published: June 2020

Abstract
It is believed that massive galaxies have quenched their star formation because of active galactic nucleus feedback. However, recent studies have shown that some massive galaxies are still forming stars. We analyze the morphology of star formation regions for galaxies of stellar masses larger than 1011.3
M
⊙ at around redshift z

r
= 0.5 using u − z color images. We find that about 20% of the massive galaxies are star-forming (SF) galaxies, and most of them (∼85%) have asymmetric structures induced by recent mergers. Moreover, for these asymmetric galaxies, we find that the asymmetry of the SF regions becomes larger for bluer galaxies. Using the Illustris simulation, we can qualitatively reproduce the observed relation between asymmetry parameter and color. Furthermore, using the merger trees in the simulation, we find a correlation between the color of the main branch galaxies at z

r
= 0.5 and the sum of the star formation rates of the recently accreted galaxies, which implies that star formation of the accreted galaxies has contributed to the observed star formation of the massive (host) galaxies (ex situ star formation). Furthermore, we find two blue and symmetric galaxies, candidates for massive blue disks, in our observed sample, which indicates that about ∼10% of massive SF galaxies are forming stars in the normal mode of disk star formation (in situ star formation). With the simulation, we find that the disk galaxies at z

r
≈ 0.5 should have experienced few major mergers during the last 4.3 Gyr.
The Chemistry of Cosmic Dust Analogs from C, C2, and C2H2 in C-rich Circumstellar Envelopes
Authors: Santoro Gonzalo , Martínez Lidia , Lauwaet Koen , Accolla Mario , Tajuelo-Castilla Guillermo , Merino Pablo , Sobrado Jesús M. , Peláez Ramón J. , Herrero Víctor J. , Tanarro Isabel , Mayoral Álvaro , Agúndez Marcelino , Sabbah Hassan , Joblin Christine , Cernicharo José , Martín-Gago José Ángel 
Published: June 2020

Abstract
Interstellar carbonaceous dust is mainly formed in the innermost regions of circumstellar envelopes around carbon-rich asymptotic giant branch stars (AGBs). In these highly chemically stratified regions, atomic and diatomic carbon, along with acetylene, are the most abundant species after H2 and CO. In a previous study, we addressed the chemistry of carbon (C and C2) with H2 showing that acetylene and aliphatic species form efficiently in the dust formation region of carbon-rich AGBs whereas aromatics do not. Still, acetylene is known to be a key ingredient in the formation of linear polyacetylenic chains, benzene, and polycyclic aromatic hydrocarbons (PAHs), as shown by previous experiments. However, these experiments have not considered the chemistry of carbon (C and C2) with C2H2. In this work, by employing a sufficient amount of acetylene, we investigate its gas-phase interaction with atomic and diatomic carbon. We show that the chemistry involved produces linear polyacetylenic chains, benzene, and other PAHs, which are observed with high abundances in the early evolutionary phase of planetary nebulae. More importantly, we have found a nonnegligible amount of pure and hydrogenated carbon clusters as well as aromatics with aliphatic substitutions, both being a direct consequence of the addition of atomic carbon. The incorporation of alkyl substituents into aromatics can be rationalized by a mechanism involving hydrogen abstraction followed by methyl addition. All the species detected in the gas phase are incorporated into nanometric-sized dust analogs, which consist of a complex mixture of sp, sp2, and sp3 hydrocarbons with amorphous morphology.
The Value of Progenitor Radius Measurements for Explosion Modeling of Type II-Plateau Supernovae
Authors: Goldberg Jared A. , Bildsten Lars 
Published: June 2020

Abstract
Using Modules for Experiments in Stellar Astrophysics (MESA)+STELLA, we show that very different physical models can adequately reproduce a specific observed Type II-Plateau supernova (SN). We consider SN2004A, SN2004et, SN2009ib, SN2017eaw, and SN2017gmr, nickel-rich (

) events with bolometric lightcurves and a well-sampled decline from the plateau. These events also have constraints on the progenitor radius, via a progenitor image, or, in the case of SN2017gmr, a radius from fitting shock-cooling models. In general, many explosions spanning the parameter space of progenitors can yield excellent lightcurve and Fe-line velocity agreement, demonstrating the success of scaling laws in motivating models that match plateau properties for a given radius and highlighting the degeneracy between plateau luminosity and velocity in models and observed events, which can span over 50% in ejecta mass, radius, and explosion energy. This can help explain disagreements in explosion properties reported for the same event using different model calculations. Our calculations yield explosion properties when combined with pre-explosion progenitor radius measurements or a robust understanding of the outermost

of material that quantifies the progenitor radius from SN observations a few days after explosion.
Highly Structured Quasar Outflow in SDSS J010612.22+001920.1
Authors: Lu 陆伟 Wei-Jian 坚 , Lin 林樱 Ying-Ru 如 
Published: June 2020

Abstract
Evidence for quasar outflows can be detected via blueshifted broad absorption lines (BALs) in rest-frame ultraviolet spectra of quasars. We have identified 18 narrow absorption line (NAL) systems in the BAL system of SDSS J010612.22+001920.1, indicating that this BAL outflow has achieved a high degree of clumpiness. Moreover, these NAL systems are highly structured in velocity space and separated from each other by the doublet spacings of multiple ionic species, including a sequence of 10 C iv doublets that form arithmetic progression with a common difference of ≈498

. Cases like J010612.22+001920.1 offer strong evidence for the dynamical process of radiative acceleration in quasar outflow, and open up a new way for the research of quasar outflow under the framework of the NAL complex.
Maunder’s Work on Planetary Habitability in 1913: Early Use of the term “Habitable Zone” and a “Drake Equation” Calculation
Authors: Lorenz Ralph D. 
Published: June 2020

Abstract
E. W. Maunder’s popular book “Are the Planets Inhabited?” has a strikingly modern perspective on the question, and may be the first use in this context of the phrase “habitable zone.”
Cost Analysis of Teleophthalmology Screening for Diabetic Retinopathy Using Teleophthalmology Billing Codes
Authors: Ellis Michael P. , Bacorn Colin , Luu Kieu-Yen , Lee Sophie C. , Tran Steven , Lillis Christopher , Lim Michele C. , Yiu Glenn 
Published: June 2020

BACKGROUND AND OBJECTIVE:
To evaluate the financial sustainability of teleophthalmology screening for diabetic retinopathy (DR) using telehealth billing codes.

PATIENTS AND METHODS:
The authors performed an Institutional Review Board-approved retrospective review of medical records, billing data, and quality metrics at the University of California Davis Health System from patients screened for DR through an internal medicine-based telemedicine program using CPT codes 92227 or 92228.

RESULTS:

A total of 290 patients received teleophthalmology screening over a 12-month period, resulting in an increase in the DR screening rate from 49% to 63% (
P
< .0001). The average payment per patient was $19.86, with an estimated cost of $41.02 per patient. The projected per-patient incentive bonus was $43.06 with a downstream referral revenue of $39.38 per patient. One hundred seventy-eight clinic visits were eliminated, providing an estimated cost savings of $42.53 per patient.

CONCLUSION:
Sustainable teleophthalmology screening may be achieved by billing telehealth codes but only with health care incentive bonuses, patient referrals, and by accounting for the projected cost-savings of eliminating office visits.

[
Ophthalmic Surg Lasers Imaging Retina.
2020;51:S26–S34.]
L’éducation spirituelle ou l’autre de la pédagogie ?
Authors: Filliot Philippe 
Published: June 2020

En faisant le détour par les spiritualités – en particulier orientales et extrême-orientales – il s’agit d’essayer de voir sous un angle inédit les questions qui se posent dans l’éducation et, par ce biais, penser autrement la pédagogie. Les domaines de recherche, dans une optique multiréférentielle, portent sur quatre voies envisagées à travers une lecture pédagogique : le yoga, les sagesses chinoises, le bouddhisme zen et, enfin, la direction de conscience dans le christianisme. Notre hypothèse est qu’il y a dans ces spiritualités – à la fois dissemblables et cohérentes – une « philosophie de l’éducation » à part entière, même si elle ne se nomme pas telle, et qui reste à mettre à jour. Dans ce dehors de l’univers scolaire, comment caractériser la relation triangulaire maître-élève-savoir ? Peut-on dégager, au-delà des spécificités historiques et culturelles, un modèle de pensée propre à ce que nous appelons « l’éducation spirituelle » ?
Patient-reported outcomes from a phase IV study of aflibercept in patients with refractory retinal vein occlusions
Authors: Spooner Kimberly , Fraser-Bell Samantha , Hong Thomas , Chang Andrew 
Published: June 2020

PURPOSE:
To determine the patient-centered effectiveness of switching patients with persistent macular edema due to retinal vein occlusion (RVO) to aflibercept using the National Eye Institute Visual Function Questionnaire 25 (NEI-VFQ-25).

MATERIALS AND METHODS:
Prospective study of eyes with persistent cystoid macular edema due to RVO despite regular treatment with bevacizumab or ranibizumab switched to aflibercept. Three loading doses of intravitreal aflibercept were administered every 4 weeks and thereafter every 8 weeks until week 48. Vision-related quality of life (VRQoL) using NEI-VFQ-25 was measured at baseline, 24 weeks, and 48 weeks following the switch. Baseline scores were compared to week 24 and 48 using paired t-test. Relationship between best-corrected visual acuity (BCVA) in the study eye and the NEI-VFQ-25 composite and subscale scores was investigated.

RESULTS:
Eighteen patients with RVO were enrolled in the study with a mean age of 70.3 ± 8.6 years. The mean change in BCVA and central macular thickness (CMT) from baseline to 48 weeks was +20.6 ± 5.2 Early Treatment of Diabetic Retinopathy Score letters and −109.2 ± 82.8 µm, respectively. VRQoL improved significantly, with an increase of mean NEI-VFQ composite score of 11.5 ± 9.5; the corresponding improvements in near and distant activities were 13.3 ± 19.4 and 8.4 ± 10.4, respectively (P < 0.001 for both). Logistic regression analysis demonstrated that BCVA gain of >15 letters and CMT < 300 µm at the end of the study predicted a higher change in VFQ-25.

CONCLUSION:
Switching eyes with persistent macular edema due to RVO to aflibercept resulted in significant improvement in visual function and patient satisfaction.
Age affects intraocular lens attributes preference in cataract surgery
Authors: Chang Shu-Wen , Wu Wan-Lin 
Published: June 2020

PURPOSE:
The aim of this study is to analyze the effects of age on intraocular lens (IOL) attributes preference.

MATERIALS AND METHODS:
We enrolled 4213 eyes that underwent smooth phacoemulsification and IOL implantation between January 2005 and June 2018. Patients were subdivided into six groups according to their ages, i.e.,≤40, 41–50, 51–60, 61–70, 71–80, and ≥ 81 years old. The difference in preference of IOL attributes regarding age, gender, and year of surgery was analyzed separately. The analyzed IOL attributes included asphericity, astigmatism-correction, presbyopia-correction, and blue-blocking function.

RESULTS:
The patients averaged 68.3 ± 11.6 years old at the time of surgery. There was no significant difference in age between males and females. There were 1980 patients (47.0%) selected aspheric IOL, 822 patients (19.5%) selected multifocal (MF) IOL, 93 patients (2.2%) selected toric IOL, and 859 patients (20.4%) selected blue-blocking IOL. Adoption of aspheric and MF IOL increased significantly during the study (P < 0.001 for both attributes). There were more young patients selected aspheric and MF IOL (P < 0.001 for both), and the change in the trend of adoption over the years was also most significant in the young group (P < 0.001 for both). The proportion of patients that selected blue-blocking IOL decreased significantly after 2011 (P < 0.001). There was no gender preference in aspheric, MF, and toric IOL selection. However, there were more male patients selected blue-blocking IOL (P = 0.018).

CONCLUSION:
The adoption of IOLs with emerging technologies increased significantly over the years. Younger adults tended to adopt advanced technology IOL more than the older ones.