bluuebunny/crossref_metadata_2025_split huggingface dataset:
Persepsi dan Partisipasi Petani terhadap Program Asuransi Usaha Tani Padi (AUTP) dengan Minat Bertani
Authors: Maman Ujang , Aminuddin Iwan , Hermawan Rizki 
Published: January 2021

Pelaksanaan program Asuransi Usaha Tani Padi (AUTP) oleh Kementerian Pertanian Republik Indonesia didasari untuk memberikan jaminan terhadap risiko ketidakpastian atau kerugian gagal panen. Petani sebagai peserta asuransi mendapatkan bantuan premi apabila mengalami risiko, namun relatif sedikit petani yang mengikuti dan di beberapa wilayah hanya mencapai 12,87%. Penelitian ini bertujuan mengetahui gambaran sosial-ekonomi petani, persepsi dan partisipasi petani terhadap program AUTP dan hubungannya dengan minat bertani (kasus: Petani di Kabupaten Lebak Provinsi Banten). Jenis penelitian ini adalah survei pada pendekatan deskriptif kuantitatif. Objek dan lokasi ditentukan secara purposive terhadap petani padi yang berlokasi di Kabupaten Lebak, Provinsi Banten. Penentuan jumlah sampel dengan rumus slovin dan teknik pengambilan sampel proportional random sampling sebanyak 105 responden yang tersebar di kelompok tani Peujeuh Mandiri, Sari Asih, Tani Makmur dan Surya Tani. Analisis data menggunakan deskriptif tabulasi dan statistik chi-square untuk melihat hubungan antar variabel dengan ketentuan data ordinal. Hasil temuan menjelaskan karakteristik responden mayoritas tingkat pendidikan rendah, berusia tua, memiliki lahan garapan sempit, kurang kesadaran mengikuti sosialisasi, tingkat persepsi dan partisipasi petani terhadap program AUTP rendah. Variabel tingkat persepsi dan partisipasi terhadap program AUTP berhubungan signifikan dengan minat bertani, di mana peningkatan minat bertani berbanding lurus dengan tingkat persepsi dan partisipasi dalam program AUTP.
Responsible remembering and forgetting as contributors to memory for important information
Authors: Murphy Dillon H. , Castel Alan D. 
Published: January 2021

AbstractThe ability to control both what we remember and what is forgotten can enhance memory. The present study used an item-method directed forgetting paradigm to investigate whether participants strategically remembered items they were responsible for remembering rather than items a hypothetical friend was responsible for remembering. Specifically, participants were presented with a 20-word list (either unrelated words or items to pack for a camping trip) with each word followed by a cue indicating whether the participant (You) or their “friend” (Friend) was responsible for remembering the word. When asked to recall all of the words, regardless of the cue, recall was sensitive to the You and Friend instructions such that participants demonstrated elevated recall for the items they were responsible for remembering, and participants also strategically organized retrieval by recalling You items before Friend items. Additionally, when asked to judge the importance of remembering each item, participants’ recall and recognition were sensitive to item importance regardless of cue. Taken together, the present experiments revealed that the strategic encoding of important information and the forgetting of less important, goal-irrelevant information can maximize memory utility and minimize negative consequences for forgetting. Thus, we provide evidence for a metacognitive process we are calling responsible forgetting, where people attempt to forget less consequential information and focus on remembering what is most important.
Proficiency of Maritime English course: An investigation in Istanbul, Turkey
Authors: Saray Sercan , Satır Tanzer , Dogan-Saglamtimur Neslihan 
Published: January 2021

Effective communication in the sea and ocean can only be achieved through a common language. Maritime professions in Turkey for many years have been seen as an important area of employment. Maritime vocational and technical high schools are also seen as educational institutions that play an important role in this field. In this study, it has been aimed to define the level of general and Maritime English education provided by the maritime vocational high schools, the problems and deficiencies of education, and what must be done to improve the education quality. A questionnaire was conducted to 200 graduates of maritime vocational high schools in order to determine the efficiency, deficiencies and issues that need to be improved. The results of the survey were analyzed by SPSS and made meaningful. For analysis, t-test was used to evaluate numerical data between two independent groups and One-Way Analysis of Variance (ANOVA) test was used to evaluate numerical data between more than two independent groups. After the One-Way ANOVA Test, Tukey Test was used as a complementary Post-Hoc analysis to determine the differences. Finally, Pearson correlation method was used to evaluate the continuous numerical variables used in the research. As a result of the research, it has been seen that Maritime English education in vocational high schools is far from meeting the needs of today's world and the maritime sector. It was observed that the graduates felt this inadequacy heavily on ships and experienced the effects of this deficiency in all of their professional life. As stated in the survey results, it is thought that the Maritime English educators with sea experience will increase the motivation of the students. Programs sourced from the field need to be reorganized. Also, it will be beneficial to rearrange the requirements of the seafarer educators for giving English lessons.
Variability in NGC 3201 Giant Stars and Its Impact on Their Spectroscopic [Fe/H] Determination
Authors: Albornoz Á. Llancaqueo , Villanova S. , Cortés C. C. , Ahumada J. A. , Parisi C. 
Published: January 2021

Abstract
We present the analysis of 34 light curves in V and I of 17 giant stars in the globular cluster NGC 3201 to check if such stars are variable and if their variability has some kind of impact on the iron abundance as obtained from spectroscopic measurements. First, we computed the generalized Lomb–Scargle and phase dispersion minimization periodograms of the sample to check if the stars were variables. In this way, seven stars of the sample were found to be nonvariable, two stars are considered as possible variables, and eight stars were found to be variable, with periods ranging from 0.0881 ± 0.0001 to 0.5418 ± 0.0027 days. According to the literature, the variables have distinct values of [Fe I/H]: the three most metal-rich stars are in the red giant branch (RGB) stage, one has [Fe I/H] = −1.37 dex, while the other two have [Fe I/H] = −1.31 dex. The two most metal-poor variables have [Fe I/H] = −1.61 dex and [Fe I/H] = −1.62 dex, and are AGB stars; the remaining variables have [Fe I/H] = −1.44, −1.48, and −1.50 dex, the first two being RGB stars while the last is an AGB star. On the other hand, stars that appear to be nonvariable have −1.56 ≤ [Fe I/H] ≤ −1.40. We conclude that variability somehow affects the spectroscopic determination of the iron content of giant stars in NGC 3201, increasing the iron spread of the cluster. If variability is not taken into account, this spread could be incorrectly interpreted as due to an intrinsic iron spread affecting the stars of the cluster.
Elemental Abundances of Major Elements in the Solar Wind as Measured in Genesis Targets and Implications on Solar Wind Fractionation
Authors: Heber Veronika S. , McKeegan Kevin D. , Steele Robert C. J. , Jurewicz Amy J. G. , Rieck Karen D. , Guan Yunbin , Wieler Rainer , Burnett Donald S. 
Published: January 2021

Abstract
We present elemental abundance data of C, N, O, Na, Mg, Al, Ca, and Cr in Genesis silicon targets. For Na, Mg, Al, and Ca, data from three different solar wind (SW) regimes are also presented. Data were obtained by backside depth profiling using secondary ion mass spectrometry. The accuracy of these measurements exceeds those obtained by in situ observations; therefore, the Genesis data provide new insights into elemental fractionation between Sun and SW, including differences between SW regimes. We integrate previously published noble gas and hydrogen elemental abundances from Genesis targets, as well as preliminary values for K and Fe. The abundances of the SW elements measured display the well-known fractionation pattern that correlates with each element’s first-ionization potential (FIP). When normalized either to spectroscopic photospheric solar abundances or to those derived from CI-chondritic meteorites, the fractionation factors of low-FIP elements (K, Na, Al, Ca, Cr, Mg, Fe) are essentially identical within uncertainties, but the data are equally consistent with increasing fractionation with decreasing FIP. The elements with higher FIPs between ∼11 and ∼16 eV (C, N, O, H, Ar, Kr, Xe) display a relatively well-defined trend of increasing fractionation with decreasing FIP, if normalized to modern 3D photospheric model abundances. Among the three Genesis regimes, the fast SW displays the least elemental fractionation for almost all elements (including the noble gases) but differences are modest: for low-FIP elements, the precisely measured fast–slow SW variations are less than 3%.
Dynamically Tagged Groups of Very Metal-poor Halo Stars from the HK and Hamburg/ESO Surveys
Authors: Limberg Guilherme , Rossi Silvia , Beers Timothy C. , Perottoni Hélio D. , Pérez-Villegas Angeles , Santucci Rafael M. , Abuchaim Yuri , Placco Vinicius M. , Lee Young Sun , Christlieb Norbert , Norris John E. , Bessell Michael S. , Ryan Sean G. , Wilhelm Ronald , Rhee Jaehyon , Frebel Anna 
Published: January 2021

Abstract
We analyze the dynamical properties of ∼1500 very metal-poor (VMP; [Fe/H] ≲ −2.0) halo stars, based primarily on medium-resolution spectroscopic data from the HK and Hamburg/ESO surveys. These data, collected over the past 30 yr, are supplemented by a number of calibration stars and other small samples, along with astrometric information from Gaia DR2. We apply a clustering algorithm to the 4D energy-action space of the sample, and identify a set of 38 dynamically tagged groups (DTGs), containing between 5 and 30 member stars. Many of these DTGs can be associated with previously known prominent substructures such as Gaia-Sausage/Enceladus (GSE), Sequoia, Helmi Stream (HStr), and Thamnos. Others are associated with previously identified smaller dynamical groups of stars and streams. We identify 10 new DTGs as well, many of which have strongly retrograde orbits. We also investigate possible connections between our DTGs and ∼300 individual r-process-enhanced (RPE) stars from a recent literature compilation. We find that several of these objects have similar dynamical properties to GSE (5), the HStr (4), Sequoia (1), and Rg5 (1), indicating that their progenitors might have been important sources of RPE stars in the Galaxy. Additionally, a number of our newly identified DTGs are shown to be associated with at least two RPE stars each (DTG-2: 3, DTG-7: 2; DTG-27: 2). Taken as a whole, these results are consistent with ultra-faint and/or dwarf spheroidal galaxies as birth environments in which r-process nucleosynthesis took place, and then were disrupted by the Milky Way.
Spatial Distribution of O vi Covering Fractions in the Simulated Circumgalactic Medium
Authors: Marra Rachel , Churchill Christopher W. , Kacprzak Glenn G. , Vander Vliet Rachel , Ceverino Daniel , Lewis James G. , Nielsen Nikole M. , Muzahid Sowgat , Charlton Jane C. 
Published: January 2021

Abstract
We use adaptive mesh refinement cosmological simulations to study the spatial distribution and covering fraction of

absorption in the circumgalactic medium (CGM) as a function of projected virial radius and azimuthal angle. We compare these simulations to an observed sample of 53 galaxies from the Multiphase Galaxy Halos Survey. Using Mockspec, an absorption-line analysis pipeline, we generate synthetic quasar absorption-line observations of the simulated CGM. To best emulate observations, we studied the averaged properties of 15,000 “mock samples,” each of 53 sight lines having a distribution of

and sight-line orientation statistically consistent with the observations. We find that the

covering fraction obtained for the simulated galaxies agrees well with the observed value for the inner halo (

) and is within 1.1σ in the outer halo (

), but is underproduced within

. The observed bimodal distribution of the

covering fraction with azimuthal angle, showing a higher frequency of absorption along the projected major and minor axes of galaxies, is not reproduced in the simulations. Further analysis reveals the spatial-kinematic distribution of

-absorbing gas is dominated by outflows in the inner halo mixed with an inflowing gas that originates from farther out in the halo. Though the CGM of the individual simulated galaxies exhibits spatial structure, the flat azimuthal distribution occurs because the individual simulated galaxies do not develop a CGM structure that is universal from galaxy to galaxy.
Icarus: A Flat and Fast Prograde Stellar Stream in the Milky Way Disk
Authors: Fiorentin Paola Re , Spagna Alessandro , Lattanzi Mario G. , Cignoni Michele 
Published: January 2021

Abstract
We explore the local volume of the Milky Way via chemical and kinematical measurements from high-quality astrometric and spectroscopic data recently released by the Gaia, APOGEE, and GALAH programs. We chemically select 1137 stars up to 2.5 kpc of the Sun and [Fe/H] ≤ −1.0 dex, and find evidence of statistically significant substructures. Clustering analysis in velocity space classifies 163 objects into eight kinematical groups, whose origin is further investigated with high-resolution N-body numerical simulations of single merging events. The two retrograde groups appear associated with Gaia-Sausage-Enceladus (GSE), while the slightly prograde group could be connected to GSE or possibly Wukong. We find evidence of a new 44-member-strong prograde stream that we name Icarus; to our knowledge, Icarus is the fast-rotating stream closest to the Galactic disk to date (

, 〈V + V
LSR〉 ≃ 231 km s−1). Its peculiar chemical (〈[Fe/H]〉 ≃ −1.45, 〈[Mg/Fe]〉 ≃ −0.02) and dynamical (mean eccentricity ≃ 0.11) properties are consistent with the accretion of debris from a dwarf galaxy progenitor with a stellar mass of ∼109
M
☉ on an initial prograde low-inclination orbit, ∼10°. The remaining prograde groups are either streams previously released by the same progenitor of Icarus (or Nyx), or remnants from different satellites accreted on initial orbits at higher inclination.
Les entreprises et la finance face à leurs responsabilités climatiques
Authors: Gollier Christian 
Published: January 2021

Comme le montre le mouvement des gilets jaunes, beaucoup de concitoyens pensent que le changement climatique est grave, mais ne sont pas prêts à contribuer à l'effort collectif pour le prévenir. Les entreprises et le monde de la finance peuvent-ils se substituer à ce somnambulisme des citoyens et des politiques ? Malgré l'enthousiasme ambiant pour la finance verte, c'est loin d'être gagné. La concurrence empêche les entreprises courageuses de s'engager sans perdre des parts de marché. De plus, quand un épargnant ou une banque désinvestit du charbon, deux autres investissent. Au mieux, les marchés financiers peuvent anticiper l'émergence d'une politique climatique ambitieuse qui tarde à venir. En attendant, les acteurs de la finance responsable devraient utiliser un prix interne du carbone pour optimiser leur portefeuille. Classification JEL : G30, G38, Q54.
Introduction en bourse et croissance externe des PME françaises
Authors: Lefebvre Vivien , Hamelin Anaïs 
Published: January 2021

L'introduction en bourse est une étape majeure du développement des entreprises. Cependant peu de travaux explorent l'articulation entre politique d'acquisition et introduction en bourse. Nos résultats soulignent que les PME françaises sont nombreuses à mener des acquisitions après l'introduction, même lorsqu'elles n'ont pas d'expérience préalable en la matière, adoptant une stratégie de croissance externe en deux étapes. Ainsi, nous montrons qu'il existe une imbrication étroite entre décisions financières et stratégiques dans le cadre de l'introduction en bourse. Classification JEL : G10, G32, G34, L25.
Confrontée à un État social néolibéral, l’ESS est-elle en mesure de proposer des voies alternatives ?
Authors: Gardin Laurent , Gianfaldoni Patrick 
Published: January 2021

Les voies alternatives ouvertes par l’économie sociale et solidaire (ESS) sont questionnées à la lumière de la transformation de l’État social français sous l’effet du néolibéralisme. Identifié dans ses fondements politiques à la « gouvernementalité », à l’« entrepreneurialité » et au « managérialisme », l’État social néolibéral promeut un ensemble de normes institutionnelles affectant l’ESS, qui tend à évoluer vers une économie sociale d’entreprise. Ce mouvement normatif qui touche aux valeurs, aux principes et aux structures de l’ESS permet-il d’envisager des alternatives ? Selon les auteurs, des ferments de pratiques alternatives sont observables en marge des institutions publiques. Parallèlement, des regroupements territorialisés semblent constituer une autre trajectoire alternative, cette fois-ci en lien étroit avec l’action publique.
Transmettre des savoirs scolaires plutôt qu’éduquer des spectateurs ? Usages différenciés des films proposés par Lycéens et apprentis au cinéma
Authors: Barbier Cédric 
Published: January 2021

L’objectif principal des concepteurs du dispositif d’éducation à l’image Lycéens et apprentis au cinéma est de réorienter les pratiques et les préférences cinématographiques d’adolescents déjà consommateurs de films vers le modèle du spectateur cinéphile (au sens « savant » du terme). Cependant, il se trouve que, plus que des « experts » du cinéma, ce sont le plus souvent des enseignants qui prennent en charge cette éducation au cinéma. Dès lors, on se demandera si ces derniers, engagés dans des routines scolaires et disciplinaires, tiennent véritablement le cap d’une formation qui soit d’abord celle d’un spectateur avant d’être celle d’un élève. Ce texte propose plus largement de mettre en question l’idée que les arts à l’école renouvelleraient forcément la forme scolaire habituelle. À partir d’observations des reprises enseignantes des films, nous montrerons que les logiques artistiques ne modifient qu’à la marge les manières d’enseigner.
Lectures sociologiques des désordres scolaires dans la recherche française. 30 ans de construction de l’objet. 1985-2015. Première partie. Les désordres scolaires en sociologie de l’éducation : cartographie et transformations d’un objet de recherche
Authors: Moignard Benjamin , Rubi Stéphanie 
Published: January 2021

Cette note de synthèse s’intéresse aux travaux de recherche français qui, entre 1985 et 2015, traitent des désordres scolaires au travers de différents objets sociologiques. Les désordres scolaires (DS) ne peuvent pas être considérés comme un champ de recherche autonome et situé en tant que tel dans l’espace scientifique ; cette notion est plutôt une manière de rendre compte d’une pluralité d’objets qui, s’ils sont traités de manière disjointe, participent d’une mise en cohérence de ce qui fait problème à l’école comme de la désignation de « ceux » qui lui font des problèmes. La note de synthèse est organisée en deux parties (la seconde est à paraître dans un prochain numéro de la revue). Deux procédures nous ont permis d’établir le corpus de travaux relatifs aux DS : d’une part, une recension de tous les articles publiés dans un échantillon de onze revues scientifiques que nous avons considérées comme centrales ou signifiantes à l’égard des disciplines concernées, ou de l’objet de recherche (N = 152) ; d’autre part, une recherche par mots-clés dans les moteurs de recherche Eric, Francis, SAGE et Cairn nous ayant conduits à retenir 458 articles scientifiques et 149 ouvrages. La première partie de cette note précise la délimitation de l’objet et identifie les aspects les plus saillants de son traitement. Nous y développons plus particulièrement les éléments d’interprétation issus d’une analyse diachronique. Nous restituons dans un premier temps l’influence majeure des recherches de la Nouvelle sociologie de l’éducation (NSE) sur l’étude des DS, en lien avec la structuration plus générale en France du champ de la sociologie de l’éducation. Nous examinons ensuite le rapport dialectique entre ordre et désordre, deuxième paradigme propre aux recherches sur les DS et néanmoins considéré et travaillé différemment selon les travaux répertoriés. Les modalités de construction des travaux sur les DS et leurs évolutions sont cohérentes et renseignent sur les modalités et les mouvements à partir desquels la sociologie de l’éducation de manière plus large s’est elle-même organisée.
Analysis of amyloid and tau deposition in Alzheimer's disease using 11C-Pittsburgh compound B and 18F-THK 5351 positron emission tomography imaging
Authors: Chanisa Chotipanich , Monchaya Nivorn , Anchisa Kunawudhi , Chetsadaporn Promteangtrong , Attapon Jantarato 
Published: January 2021

AbstractThis study aims to determine the deposition of 11C-Pittsburgh compound B (11C-PiB) and 18F-THK 5351 using a normal database of the optimal cut-off-points for standardized uptake value ratios (SUVRs) in Alzheimer's disease (AD) patients. Sixteen AD patients and 24 cognitively normal individuals were enrolled in this study. The optimal cutoff points for the SUVR from the normal database were used for quantitative analysis. P-mod software with the Automated Anatomical Labeling merged atlas was employed to generate automatic volumes of interest to identify different brain regions, and the SUVRs of AD patients were compared with those of the age-matched normal controls. The correlation between PiB and THK5351 deposition at matching brain regions was identified. The mean regional 11C-PiB SUVRs of the AD patients were significantly higher than the healthy controls (P < 0.05). The 11C-PiB SUVR cut-offs were 1.46–1.81, with sensitivity ranging from 81.25% to 93.75% and specificity of 100%. The mean SUVRs of 18F-THK 5351 in various regions were also significantly higher in the AD patients than in the healthy controls (P < 0.05). The inferior temporal gyrus yielded an optimum SUVR cut-off-points of 1.5 with 80% sensitivity and 83.33% specificity. The correlation of PiB and THK5351 SUVR was reported at precuneus, parietal, and occipital brain areas, with spearman's rho of 0.67, 0.66, and 0.72, respectively. Our findings allow determination of the SUVRs of 11C-PiB and 18F-THK-5351 amyloid and tau positron emission tomography tracers for clinical use, according to the normal database of the optimal cut-off-points for SUVRs in AD patients.