bluuebunny/crossref_metadata_2025_split huggingface dataset:
POLA KOMUNIKASI GERAKAN MENGAJAR DESA KALIMANTAN TIMUR DALAM MEMBERDAYAKAN PEMUDA MELALUI KERELAWANAN
Authors: Abiyyu Khansa Yumna , Alfando WS Johantan , Purwanti Silviana , Dristiana Dwivayani Kadek 
Published: February 2025

Non-Governmental Organization dan pemuda memiliki keterkaitan yang positif, dimana melalui NGO pemuda dapat mengekspresikan ide, bersosialisasi, serta mengembangkan potensi melalui pengalaman dalam kegiatan sukarelawan. Gerakan Mengajar Desa Kalimantan Timur merupakan NGO yang memiliki tujuan memberdayakan pemuda melalui pengalaman sebagai relawan. Peningkatan anggota yang dialami, membuat keanggotaan bersifat dinamis dan menjadi tantangan bagi Gerakan Mengajar Desa Kaltim untuk membangun proses komunikasi yang efektif agar dapat mendorong anggota untuk terus berkontribusi aktif dan mencapai tujuan organisasi. Penelitian ini bertujuan untuk memberikan gambaran pola komunikasi yang terjadi pada organisasi Gerakan Mengajar Desa dalam mencapai tujuan pemberdayaan pemuda melalui kerelawanan. Pola komunikasi dianalisis berdasarkan teori pola komunikasi Joseph A. Devito yang terdiri dari pola rantai, roda, huruf “Y”, lingkaran, dan bintang/semua saluran. Penelitian ini menggunakan metode kualitatif dengan teknik pengumpulan data melalui wawancara dan dokumentasi. Proses analisis data meliputi pengumpulan data, kondensasi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa pola komunikasi bintang/saluran bebas, rantai, dan roda sering digunakan dalam proses komunikasi di Gerakan Mengajar Desa Kalimantan Timur guna menciptakan kesamaan pemahaman dalam menjalankan kegiatan. Walaupun dalam penerapannya, pola rantai tidak berjalan secara efektif karena kurangnya penegasan tugas dalam struktur organisasi di tim tutor inspiratif. Sementara itu, pola huruf “Y” dan pola lingkaran jarang digunakan dan tidak dilaksanakan secara efektif. Hasil penelitian menunjukan bahwa dalam proses pemberdayaan pemuda di Gerakan Mengajar Desa Kaltim menggunakan pendekatan pemungkinan, penguatan, penyokongan, dan pemeliharaan.
Kata Kunci: Pola Komunikasi Organisasi, Organisasi Non-Pemerintah, Pemberdayaan Pemuda
Hooks, Lines, and Sinkers: How Active Galactic Nucleus Feedback and Cosmic-Ray Transport Shape the Far-infrared–Radio Correlation of Galaxies
Authors: Ponnada Sam B. , Cochrane Rachel K. , Hopkins Philip F. , Butsky Iryna S. , Wellons Sarah , Sanchez N. Nicole , Hummels Cameron , Lu Yue Samuel , Kereš Dušan , Hayward Christopher C. 
Published: February 2025

Abstract
The far-infrared–radio correlation (FRC) is one of the most promising empirical constraints on the role of cosmic rays (CRs) and magnetic fields in galaxy formation and evolution. While many theories have been proposed in order to explain the emergence and maintenance of the FRC across a gamut of galaxy properties and redshift, the nonlinear physics at play remain unexplored in full complexity and within a cosmological context. We present the first reproduction of the z ∼ 0 FRC using detailed synthetic observations of state-of-the-art cosmological zoom-in simulations from the Feedback in Realistic Environments (FIRE-3) suite with explicitly evolved CR proton and electron (CRe) spectra, for three models for CR transport and multichannel active galactic nucleus (AGN) feedback. In doing so, we generally verify the predictions of “calorimeter” theories at high FIR luminosities (L
60 μm ≳ 109.5
L
⊙) and at low FIR luminosities (L
60 μm ≲ 109.5
L
⊙), the so-called “conspiracy” of increasing UV radiation escape in tandem with increasing CRe escape, and find that the global FRC is insensitive to orders-of-magnitude locally variable CR transport coefficients. Importantly, the indirect effect of AGN feedback on emergent observables highlights novel interpretations of outliers in the FRC. In particular, we find that in many cases “radio-excess” objects can be better understood as “IR-dim” objects with longer-lived radio contributions at low z from Type Ia supernovae and intermittent black hole accretion in quenching galaxies, though this is sensitive to the interplay of CR transport and AGN feedback physics. This creates characteristic evolutionary tracks leading to the z = 0 FRC, which shape the subsequent late-time behavior of each model.
Uncovering the Hidden Physical Structures and Protostellar Activities in the Low-metallicity S284-RE Region: Results from ALMA and JWST
Authors: Jadhav O. R. , Dewangan L. K. , Verma Aayushi , Bhadari N. K. , Maity A. K. , Sharma Saurabh , Mamta  
Published: February 2025

Abstract
We present an observational study of the S284-RE region, a low-metallicity area associated with the extended S284 H ii region. A thermally supercritical filament (mass ∼2402 M
⊙ and length ∼8.5 pc) is investigated using the Herschel column density map. The Spitzer ratio 4.5 μm/3.6 μm map traces the H2 outflows in this filament, where previously reported young stellar objects (YSOs) are spatially distributed. Analysis of the YSO distribution has revealed three active star-forming clusters (YCl1, YCl2, and YCl3) within the filament. YCl3 seems to be the most evolved and YCl2 the youngest, while YCl1 displays signs of nonthermal fragmentation. The JWST (F470N+F444W)/F356W ratio map reveals at least seven bipolar H2 outflows, with four (olc1–olc4) in YCl1 and three (ol1–ol3) in YCl2. The driving sources of these outflows are identified based on outflow geometry, Atacama Large Millimeter/submillimeter Array (ALMA) continuum peaks, and YSO positions. Two ALMA continuum sources—#2 and #3—from the M–R
eff plot are recognized as potential massive star formation candidates. ALMA continuum source #2 hosts at least three outflow-driving sources, whereas ALMA continuum source #3 contains two. The bipolar outflow olc1, driven by an embedded object within continuum source #2, is likely a massive protostar, as indicated by the Br-α and PAH emissions depicted in the JWST (F405N+F444W)/F356W ratio map. The presence of H2 knots in the outflows olc1 and ol1 suggests episodic accretion. Overall, the study investigates a massive protostar candidate, driving the ∼2.7 pc H2 outflow olc1 and undergoing episodic accretion.
The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292
Authors: Sakai Nobuyuki , Yamada Tomoya , Inoue Yoshiyuki , Owen Ellis R. , Michiyama Tomonari , Tomaru Ryota , Fukazawa Yasushi 
Published: February 2025

Abstract
Radio-quiet Seyfert galaxies have been detected in GeV gamma rays by the Fermi Large Area Telescope (LAT), but the origin of much of this emission is unclear. We consider the nearby example GRS 1734−292, which exhibits weak starburst and jet activities that are insufficient to explain the observed gamma-ray flux. With the first detailed multiwavelength study of this source, we demonstrate that an active galactic nucleus (AGN) disk wind can account for its gamma-ray emission. Using a lepto-hadronic emission model based on a shocked ambient medium and a shocked wind region created by an AGN accretion disk wind, we identify two viable scenarios that are consistent with the Fermi-LAT data and multiwavelength observations: a hadronic pp-dominated scenario and a leptonic external-Compton-dominated scenario. Both of these show that future observations with the Cherenkov Telescope Array and the Southern Wide-field Gamma-ray Observatory could detect TeV emission from a disk wind in GRS 1734−292. Such a detection would substantially improve our understanding of cosmic-ray acceleration efficiency in AGN disk wind systems and would establish radio-quiet Seyfert galaxies as cosmic-ray accelerators capable of reaching ultrahigh energies.
Analytical and Numerical Methods for Circumbinary Disk Dynamics. II. Inclined Disks
Authors: Pirog Michal , Mahesh Siddharth , McWilliams Sean T. 
Published: February 2025

Abstract
To gain insight into the dynamical influence of a supermassive black hole binary on a circumbinary accretion disk, we investigate the binary and viscous torque densities throughout such a disk, with emphasis on the final density distribution, particularly the size and stability of the central gap between the binary and the inner edge of the disk. We limit ourselves to the simplified case of a massless viscous thin accretion disk under the influence of the gravitational potential from a binary system whose orbital plane is inclined relative to the disk. We employ two-dimensional Newtonian hydrodynamics simulations to examine the influence of two model parameters: the mass ratio of the binary and the inclination angle between the binary and the disk. We investigate their impact on the density and torque distribution. In our analytical approach, we consider the stability of epicycles induced by the perturbative effect of the asymmetric inclined binary gravitational potential on Keplerian circular orbits. Through our simulations, we observe that certain configurations never attain a quasi-steady state, where the density profile averaged over many orbits stabilizes. This instability occurs when the inclination is close to 45°. Furthermore, we identify configurations where there is never a persistent balance between the dynamical and viscous torque densities, as well as cases where the location of this balance oscillates or exhibits other time-dependent behavior over viscous timescales. These findings have implications for understanding both the expected gravitational-wave signal and electromagnetic counterparts from supermassive black hole binaries.
Predicting Solar Energetic Particle Events with Time Series Shapelets
Authors: Bahri Omar , Li Peiyu , Filali Boubrahimi Soukaïna , Hamdi Shah Muhammad 
Published: February 2025

Abstract
Solar energetic particle (SEP) events pose significant risks to both space and ground-level infrastructure, as well as to human health in space. Understanding and predicting these events are critical for mitigating their potential impacts. In this paper, we address the challenge of predicting SEP events using proton flux data. We leverage some of the most recent advances in time series data mining, such as shapelets and the matrix profile, to propose a simple and easily understandable prediction approach. Our objective is to mitigate the interpretability challenges inherent to most machine learning models and to show that other methods exist that can not only yield accurate forecasts but also facilitate exploration and insight generation within the data domain. For this purpose, we construct a multivariate time series data set consisting of proton flux data recorded by the National Oceanic and Atmospheric Administration's geosynchronous orbit Earth-observing satellite. Then, we use our proposed approach to mine shapelets and make predictions using a random forest classifier. We demonstrate that our approach rivals state-of-the-art SEP prediction, offering superior interpretability and the ability to predict SEP events before their parent eruptive flares.
Shaping Outflows and Jets by Ambient Pressure: A Unified Framework
Authors: Baan Willem A. , An Tao 
Published: February 2025

Abstract
Astrophysical outflows are ubiquitous across cosmic scales, from stellar to galactic systems. While diverse launching mechanisms have been proposed, we demonstrate that these outflows share a fundamental commonality: their morphology follows the physics of pressure-confined supersonic flows. By extending classical de Laval nozzle theory to account for ambient pressure gradients, we present a unified framework that successfully describes outflows from young stellar objects to active galactic nuclei. This simplified approach, compared to full magnetohydrodynamic treatments, captures the essential physics governing outflow shapes across different scales. Our model reveals a remarkable consistency of pressure profiles, characterized by a power-law exponent near “–2” across 6 orders of magnitude in spatial scale, independent of the internal characteristics of the outflow or the nature of the central engine. This discovery suggests a universal mechanism for outflow collimation and acceleration, bridging the gap between theoretical models and observational features across a wide range of astronomical scales.
Intrinsic Pulse Widths of FRB 20121102A and Calculation of Broadening from Propagation and Instrumental Effects
Authors: Wei Jia-Peng , Huang Yong-Feng , Cui Lang , Liu Xiang , Geng Jin-Jun , Wu Xue-Feng 
Published: February 2025

Abstract
The pulse widths of fast radio bursts are always broadened due to the scattering of the plasma medium through which the electromagnetic wave passes. The recorded pulse width will be further affected by the radio telescopes since the sampling time and the bandwidth cannot be infinitely small. In this study, we focus on the pulse widths of at least 3287 bursts detected from FRB 20121102A as of 2023 October. Various effects such as the scattering broadening, the redshift-induced broadening, and the instrumental broadening are examined. At a redshift of 0.193, the pulse width is broadened by a factor of approximately 0.16 due to cosmological time dilation. It is found that the instrumental broadening only contributes a fraction of 10−3–10−1 to the observed pulse width. The scattering broadening is even smaller, which constitutes a tiny fraction of 10−5–10−2 in the observed pulse width. After correcting for these broadenings, the intrinsic pulse width is derived for each burst. The maximum and minimum pulse widths at different frequencies are highlighted. The intrinsic widths of most bursts are in a narrow range of 1–10 ms, which leads to a quasi-linear correlation between the fluence and the peak flux. Additionally, the mean value and the dispersion range of intrinsic pulse width are found to scale with the central frequency as ν
−1.2±0.2 and ν
−1.7±0.6, respectively.
Testing the Flux Rope Paradigm for Coronal Mass Ejections Using a Three-spacecraft Encounter Event
Authors: Wood Brian E. , Hess Phillip 
Published: February 2025

Abstract
We present a 3D morphological and field reconstruction of a coronal mass ejection (CME) from 2023 November 28, which hits three spacecraft near 1 au: Wind at Earth’s L1 Lagrange point, STEREO-A with a longitudinal separation of 6

.

°

5 west of Earth, and Solar Orbiter (SolO) at 10

.

°

7 east of Earth. The reconstruction assumes a magnetic flux rope (MFR) structure for the CME. With this event, we test whether field tracings observed by a spacecraft passing near the central axis of a CME MFR (STEREO-A) can be used to successfully predict the field behavior seen by a spacecraft 17∘ away (SolO), which has a more grazing encounter with the CME. We find that the MFR model does have significant success in simultaneously reproducing the field signs and rotations seen at STEREO-A, Wind, and SolO. This provides support for the MFR paradigm for CME structure. However, the SolO measurements, which are farthest from the central axis of the MFR, show less defined MFR signatures, presumably due to a greater degree of erosion and degradation of the MFR structure far from its central axis.
Fundamental Understanding of Magnetic Reconnection via Spiral CT Scan. I. Density, Temperature, Pressure, and Method Validation
Authors: Fu H. S. , Wang Z. , Cao J. B. 
Published: February 2025

Abstract
For the first time, we reveal the distribution of plasma density, electron temperature, thermal pressure, and total pressure around a reconnection X-line, by using the spiral CT scan technique, which is a novel technique analogous to that in the hospital. This X-line was detected by the Magnetospheric Multiscale spacecraft and has been widely believed to host a non-guide-field reconnection in previous studies. With the help of such an advanced technique, we find that (1) the plasma density is low on the magnetosphere side but high on the magnetosheath side; (2) the electron temperature is high on the magnetosphere side but low on the magnetosheath side; (3) the thermal pressure is high near the current sheet but low away from the current sheet; (4) the total pressure in the inflow region is higher than near the current sheet. Among these findings, the first three agree with classical theories, hence validating our novel scan technique; the last one implicates that antiparallel magnetic field lines were being pushed together and the reconnection process was ongoing.
Ground-based Characterization of (98943) Torifune 2001 CC21, the Target of the Hayabusa2# Space Mission*
Authors: Popescu Marcel M. , Tatsumi Eri , Licandro Javier , Alarcon Miguel R. , Rodríguez Rodríguez Javier , Serra-Ricart Miquel , de León Julia , Fernandez Martin Joaquín , Morate David , Simion Gabriel N. , Dumitru Bogdan Alexandru , Berteşteanu Daniel Nicolae , Prodan George Pantelimon , Hirabayashi Masatoshi 
Published: February 2025

Abstract
The near-Earth asteroid (98943) Torifune, previously designated 2001 CC21, is the flyby target of the Hayabusa2 extended mission, nicknamed Hayabusa2# (Small Hazardous Asteroid Reconnaissance Probe (SHARP)). The ground-based telescope observations offer a key science input for the mission's scientific investigation. During 2022–2024, this asteroid was at visible apparent magnitudes brighter than 18.5, allowing for a detailed characterization using ground-based telescope observations. We determined its rotation period P = 5.021516 ± 0.000106 hr and its absolute magnitude H = 18.78 ± 0.14. The large number of light curves allows us to estimate its axis ratio, its convex shape, and its pole orientation, λ = 301∘ ± 35∘,

β
=
8

9

−
6

+
1
°

, and ϵ = 5∘ ± 3∘, respectively, which indicate a prograde rotation. We report the semiaxis of the equivalent ellipsoid, a = 0.42

0.06

+
0.08

km, b = 0.16

0.04

+
0.05

km, and c = 0.17 ± 0.03 km. Consequently, the volume-equivalent diameter is D
eq = 0.44 ± 0.06 km. Using observations conducted simultaneously with four broadband filters, we determined (g − r) = 0.663 ± 0.022 mag, (r − i) = 0.177 ± 0.012 mag, and (i − z

s
) = −0.061 ± 0.032 mag. Additionally, we found that Torifune exhibits no detectable large-scale heterogeneity. We classified the object using a high signal-to-noise ratio spectrum (over the visible and near-infrared region) as Sq-type in the Bus–DeMeo taxonomy. We estimate a mineralogy similar to LL/L ordinary chondrites, with an ol/(ol+px) = 0.60, a Fa content of 28.5 mol%, and a Fs content of 23.4 mol%. The spectral data indicate a surface affected by moderate space weathering effects.
Micro-CT assessment of sealant penetration in different types of fissures in primary molars
Authors: Hristov Krasimir , Bogovska-Gigova Ralitsa , Georgieva Nedana 
Published: February 2025

Introduction: Sealants prevent the development of dental caries by forming a protective barrier that reduces bacterial growth and food retention. The morphology of the pits and fissures and the material of the sealant can affect the depth to which it penetrates into the fissures and the longevity and durability of the sealant.
Aim: To compare the depth of penetration into fissures and pits of different types of sealants in primary molars using micro-CT assessment.
Material and methods: Forty intact primary molars were extracted just prior to their physiologic exfoliation. They were sealed with glass ionomer cement (GIC) and resin sealant. The samples were scanned with a desktop X-ray microtomograph. The fissure profile, sealant penetration depth, and depth of the unfilled part of the fissure were measured. Descriptive and inferential statistics were used to analyze the data.
Results: The median penetration depth of GIC was 89% (IQR 81.31%–100.00%) in U-type fissures and 66% (IQR 55.64%–76.77%) in V-type fissures. The deepest median penetration with resin sealant was found in U-type fissures 89% (IQR 73.16%–100.00%) and the shallowest median depth was found in IK-type fissures 34% (IQR 25.39%–41.73%). Penetration depths ranged from 34% to 43% in the I and IK fissure types. No statistically significant difference was found in the penetration of the two types of sealants in the different types of fissures (p&gt;0.05), except for those classified as other types. There, a significantly greater depth of penetration was found in the group of teeth sealed with GIC - median 56%, compared to the resin sealant, which reached only 40% of the fissure depth (p=0.003).
Conclusion: The morphology of the fissure plays a more important role in determining the depth to which the sealant will penetrate the fissure than the type of sealant material used.
Transitional justice and impunity for fascism in southern Europe: The case of Spain in a comparative perspective
Authors: Moreno Fonseret Roque , Payá López Pedro 
Published: February 2025

This article addresses four cases of transitional justice practised in southern Europe from 1945 to the present day: France, Italy, Portugal, and Spain, to which special attention is paid. Representatives of what are considered the first and second wave of transitional justice, they have in common the fascist experience but the ways of facing the violent past are dissimilar due to its different national and international contexts. In France and Italy, the criminal justice, administrative purges, and economic sanctions that were applied were preceded by extra-legal repression exercised during the final phase of the war, the liberation, and the immediate postwar period in what was known as an épuration and in which the Resistance played a leading role. On the contrary, in the transitions of the late 1970s, criminal justice was applied minimally in Portugal, where administrative purges prevailed, and was non-existent in Spain, because of the Amnesty Law of 1977. Although impunity accompanied all the processes studied, the comparison reveals the singularity of the Spanish case, with a greater degree of consequence of a transition to a non-disruptive democracy with the Franco dictatorship. In the same way, in all cases, reconciliation with the past has extended into the 21st century and it has also been in Spain where it has presented the greatest difficulties.
Pour une dramaturgie de l’espace,le théâtre d’archiviozeta dans le Cimetière militaire germanique du col de la Futa
Authors: Polvani Simona 
Published: February 2025

Bâti entre 1962 et 1965 par l’architecte Dieder Oesterlen, le Cimetière militaire germanique du col de la Futa (Soldatenfriedhof Futa Pass), situé dans les montagnes de l’Apennin toscan-émilien, constitue le plus grand sacraire germanique en Italie. Sa construction évoque l’idée d’une spirale sans fin, qui soudainement s’interrompt, avec ses 2 000 mètres de mur entourant la montagne et les sépulcres qu’elle abrite. Dirigée par le duo d’artistes Gianluca Guidotti et Enrica Sangiovanni (metteurs en scène, dramaturges, comédiens), la compagnie italienne archiviozeta, depuis 2003, investit chaque été ce lieu avec des spectacles créés in situ. Adaptations de textes épiques, de tragédies grecques, des pièces contemporaines ou bien de romans, ce sont des spectacles dont le sujet se veut en résonance critique avec ce lieu tragique. Se déroulant pendant l’après-midi jusqu’au coucher de soleil, ces spectacles itinérants et ambulatoires en plein air n’ont pour scénographie que l’environnement architectural et naturel du cimetière, des montagnes qui l’entourent et du ciel. archiviozeta définit le travail spécifique d’écriture, mise en scène et d’inscription dans ce lieu comme une « dramaturgie de l’espace ». Moyennant l’analyse des choix du répertoire théâtral et des pratiques de la création théâtrale mises en place par archiviozeta face aux contraintes et au potentiel de ce sacraire, cet article se propose de questionner la notion de « dramaturgie de l’espace » et les particularités de ce travail théâtral d’un point de vue esthétique, environnemental, relationnel, autant par rapport à ce geste artistique qu’à l’expérience sensible des spectateurs. Il en émerge un théâtre à la fois politique et environnemental, où la nature, imprévisible, s’impose comme véritable partenaire de jeu.