bluuebunny/crossref_metadata_2025_split huggingface dataset:
Discovery of Two Different Full Disk Evolutionary Patterns of M-type T Tauri Stars with LAMOST DR8
Authors: Haerken 哈斯铁 Hasitieer 尔·哈尔肯 , Li 李 Guang-Wei 广伟 , Li 李 Min 敏 , Duan 段 Fuqing 福庆 , Zhao 赵 Yongheng 永恒 
Published: December 2023

Abstract
The full disk, full of gas and dust, determines the upper limit of planet masses, and its lifetime is critical for planet formation, especially for giant planets. In this work, we studied the evolutionary timescales of the full disks of T Tauri stars (TTSs) and their relations to accretion. Combined with Gaia EDR3, Two Micron All Sky Survey, and Wide-field Infrared Survey Explorer data, 1077 disk-bearing TTS candidates were found in LAMOST DR8, and stellar parameters were obtained. Among them, 783 are newly classified by spectra as classical T Tauri stars (CTTSs; 169) or weak-lined T Tauri stars (WTTSs). Based on EW and FWHM of Hα, 157 TTSs in accretion were identified, with ∼82% also having full disks. For TTSs with M < 0.35M
☉, about 80% seem to already lose their full disks at ∼0.1 Myr, which may explain their lower mass, while the remaining 20% with full disks evolve at similar rates of non-full disks within 5 Myr, allowing enough time and material to form giant planets. The fraction of accreting TTSs to disk-bearing TTSs is stable at ∼10% and can last ∼5–10 Myr, suggesting that full disks and accretion evolve with similar rates as non-full disks. For TTSs with M > 0.35 M
☉, almost all full disks can survive more than 0.1 Myr, most for 1 Myr and some even for 20 Myr. For TTSs with M > 0.35 M
☉, almost all full disks can survive more than 0.1 Myr, most for 1 Myr, and some even for 20 Myr, which implies planets are more likely to be formed in their disks than those of M < 0.35 M
☉, and thus M dwarfs with M > 0.35 M
☉ can have more planets. The fraction of full-disk TTSs to disk-bearing TTSs decreases with age following the relation f ∝ t
−0.35, and similar relations existed in the fraction of accreting TTSs and the fraction of full-disk CTTSs, suggesting faster full disks and accretion evolution than non-full disks. For full-disk stars, the ratio of accretion of lower-mass stars is systematically lower than that of higher-mass stars, confirming the dependence of accretion on stellar mass, which may be reflective of an observational bias in the detection of accretion levels, with the lower-mass stars crossing below the detection threshold earlier than higher-mass stars.
Living with a Red Dwarf: X-Ray, UV, and Ca ii Activity–Age Relationships of M Dwarfs
Authors: Engle Scott G. 
Published: December 2023

Abstract
The vast majority of stars in the nearby stellar neighborhood are M dwarfs. Their low masses and luminosities result in slow rates of nuclear evolution and minimal changes to the stars’ observable properties, even along astronomical timescales. However, they possess relatively powerful magnetic dynamos and resulting X-ray to UV (X–UV) activity, compared to their bolometric luminosities. This magnetic activity does undergo an observable decline over time, potentially making it a key age determinant for M dwarfs. Observing this activity is important for studying the outer atmospheres of these stars, but also for comparing the behaviors of different spectral type subsets of M dwarfs; e.g., those with partially versus fully convective interiors. Beyond stellar astrophysics, understanding the X–UV activity of M dwarfs over time is a key component when studying the atmospheres and habitability of any hosted exoplanets. Earth-sized exoplanets, in particular, are more commonly found orbiting M dwarfs than any other stellar type, and thermal escape (driven by the M dwarf X–UV activity) is believed to be the dominant atmospheric loss mechanism for these planets. Utilizing recently calibrated M dwarf age–rotation relationships, also constructed as part of the Living with a Red Dwarf program, we have analyzed the evolution of M dwarf activity over time, in terms of coronal (X-ray), chromospheric (Lyα, and Ca ii), and overall X–UV (5–1700 Å) emissions. The activity–age relationships presented here will be useful for studying exoplanet habitability and atmospheric loss, and also for studying the different dynamo and outer atmospheric heating mechanisms at work in M dwarfs.
The Effects of Thomson Scattering and Chemical Mixing on Early-time Light Curves of Double-peaked Type IIb Supernovae
Authors: Park Seong Hyun , Yoon Sung-Chul , Blinnikov Sergei 
Published: December 2023

Abstract
Previous numerical simulations of double-peaked Type IIb supernova (SN IIb) light curves have demonstrated that the radius and mass of the hydrogen-rich envelope of the progenitor star can significantly influence the brightness and timescale of the early-time light curve around the first peak. In this study, we investigate how Thomson scattering and chemical mixing in the SN ejecta affect the optical light curves during the early stages of the SNe IIb using radiation hydrodynamics simulations. By comparing the results from two different numerical codes (i.e., STELLA and SNEC), we find that the optical brightness of the first peak can be reduced by more than a factor of 3 as a result of the effect of Thomson scattering that causes the thermalization depth to be located below the Rosseland mean photosphere, compared to the corresponding case where this effect is ignored. We also observe a short-lived plateau-like feature lasting for a few days in the early-time optical light curves of our models, in contrast to typical observed SNe IIb that show a quasi-linear decrease in optical magnitudes after the first peak. A significant degree of chemical mixing between the hydrogen-rich envelope and the helium core in SN ejecta is required to reconcile this discrepancy between the model prediction and observation. Meanwhile, to properly reproduce the first peak, a significant mixing of 56Ni into the hydrogen-rich outermost layers should be restricted. Our findings indicate that inferring the SN IIb progenitor structure from a simplified approach that ignores these two factors may introduce substantial uncertainty.
Pure Spectroscopic Constraints on UV Luminosity Functions and Cosmic Star Formation History from 25 Galaxies at
z
spec = 8.61–13.20 Confirmed with JWST/NIRSpec
Authors: Harikane Yuichi , Nakajima Kimihiko , Ouchi Masami , Umeda Hiroya , Isobe Yuki , Ono Yoshiaki , Xu Yi , Zhang Yechi 
Published: December 2023

Abstract
We present pure spectroscopic constraints on the UV luminosity functions and cosmic star formation rate (SFR) densities from 25 galaxies at z
spec = 8.61–13.20. By reducing the JWST/NIRSpec spectra taken in multiple programs of Early Release Observation, Early Release Science, General Observer, and Director’s Discretionary Time observations with our analysis technique, we independently confirm 16 galaxies at z
spec = 8.61–11.40, including new redshift determinations, and a bright interloper at z
spec = 4.91 that was claimed as a photometric candidate at z ∼ 16. In conjunction with nine galaxies at redshifts up to z
spec = 13.20 in the literature, we make a sample of 25 spectroscopically confirmed galaxies in total and carefully derive the best estimates and lower limits of the UV luminosity functions. These UV luminosity function constraints are consistent with the previous photometric estimates within the uncertainties and indicate mild redshift evolution toward z ∼ 12, showing tensions with some theoretical models of rapid evolution. With these spectroscopic constraints, we obtain firm lower limits of the cosmic SFR densities and spectroscopically confirm a high SFR density at z ∼ 12 beyond the constant star formation efficiency models, which supports earlier claims from the photometric studies. While there are no spectroscopically confirmed galaxies with very large stellar masses violating the ΛCDM model due to the removal of the bright interloper, we confirm star-forming galaxies at z
spec = 11–13 with stellar masses much higher than model predictions. Our results indicate possibilities of high star formation efficiency (>5%), a hidden active galactic nucleus, a top-heavy initial mass function (possibly with Population III), and large scatter/variance. Having these successful and unsuccessful spectroscopy results, we suggest observational strategies for efficiently removing low-redshift interlopers for future JWST programs.
Observation of Interchange Reconnection on Mars
Authors: Lin R. T. , Huang S. Y. , Yuan Z. G. , Jiang K. , Xu S. B. , Wei Y. Y. , Xiong Q. Y. , Zhang J. , Wang Z. , Yu L. 
Published: December 2023

Abstract
Without a global dipole magnetic field, Mars has magnetic anomalies, i.e., crustal fields, in the southern hemisphere and interesting flexible magnetic fields in the magnetotail. The magnetic field topology is complex and flexible in the Martian magnetotail, especially over regions of strong crustal fields. However, the answer to how the magnetic field topology within crustal field regions transitions is elusive. Here we report the first case of interchange reconnection between open and closed crustal fields in the near-Mars magnetotail, using Mars Atmosphere and Volatile Evolution (MAVEN) observations. While MAVEN crossed from a region of closed crustal field to one of open crustal field, several characteristics of reconnection, such as the Hall magnetic field and plasma outflow, were observed. And plasmas are exchanged in the reconnection region. Our observations demonstrate that interchange reconnection can occur between open and closed crustal fields in the Martian near-magnetotail. Interchange reconnection occurring on the nightside changes the magnetic field topology within the crustal field regions and contributes to the escape of heavy ions.
La mise en chiffres contestée
Authors: Posselt Lukas 
Published: December 2023

En étudiant les controverses nées d’une enquête sociale menée peu après la Seconde Guerre mondiale en Suisse, cet article montre comment différentes visions des causes de la pauvreté ont coexisté dans l’assistance publique. En 1946, la Conférence suisse des directeurs cantonaux de l’assistance publique organise une enquête statistique sur les « causes du paupérisme » et demande aux autorités communales d’assistance publique de classer chaque cas d’assistance selon une des causes du paupérisme. Dans un processus d’expansion de l’État social, certains responsables d’assistance attendent de cette enquête des arguments pour prouver au public l’importance de l’assistance publique dans l’après-guerre. Cette attente s’évanouit toutefois en raison d’une controverse alimentée par plusieurs critiques. L’article étudie ces critiques, retrace leurs sources historiques et contribue ainsi à une sociologie historique des savoirs de l’assistance publique.
Surgical Nursing Students’ Perception of Feedback in Clinical Education: A Mixed-method Study
Authors: Javadi Alireza , Keshmiri Fatemeh 
Published: December 2023

ABSTRACTBackground:Feedback is a critical component of education but may not always be delivered in a useful manner. This study assessed surgical nursing students’ perception of the feedback they received on a clinical rotation.Methods:This is a sequential mixed-method study. The first stage surveyed surgical nursing students in surgical units about the feedback they received. In the second stage, participants’ experiences receiving feedback were explored in interviews, and analyzed by a conventional content analysis approach.Results:The majority of nurses found that feedback was not helpful, citing a lack of constructive feedback. Negative feedback was often delivered in a public setting. Comments were frequently based on secondary information rather than direct observation.Discussion:Feedback to nurses on the surgical unit is not perceived by students as constructive. Clinical teachers did not appear to be aware of the educational effect of the feedback on the learning process of students. In addition, the setting for feedback often undermined its effectiveness. Staff development on effective feedback for teachers on the surgical unit is recommended.
Tree structure of spectra of spectral Moran measures with consecutive digits
Authors: Wang Cong , Yin Feng-Li 
Published: December 2023

AbstractLet
$\{b_n\}_{n=1}^{\infty }$
be a sequence of integers larger than 1. We will study the harmonic analysis of the equal-weighted Moran measures
$\mu _{\{b_n\},\{{\mathcal D}_n\}}$
with
${\mathcal D}_n=\{0,1,2,\ldots ,q_n-1\}$
, where
$q_n$
divides
$b_n$
for all
$n\geq 1.$
In this paper, we first characterize all the maximal orthogonal sets of
$L^2(\mu _{\{b_n\},\{{\mathcal D}_n\}})$
via a tree mapping. By this characterization, we give some sufficient conditions for the maximal orthogonal set to be an orthonormal basis.
Deep learning-based magnetic resonance imaging reconstruction for improving the image quality of reduced-field-of-view diffusion-weighted imaging of the pancreas
Authors: Takayama Yukihisa , Sato Keisuke , Tanaka Shinji , Murayama Ryo , Goto Nahoko , Yoshimitsu Kengo 
Published: December 2023

BACKGROUND
It has been reported that deep learning-based reconstruction (DLR) can reduce image noise and artifacts, thereby improving the signal-to-noise ratio and image sharpness. However, no previous studies have evaluated the efficacy of DLR in improving image quality in reduced-field-of-view (reduced-FOV) diffusion-weighted imaging (DWI) [field-of-view optimized and constrained undistorted single-shot (FOCUS)] of the pancreas. We hypothesized that a combination of these techniques would improve DWI image quality without prolonging the scan time but would influence the apparent diffusion coefficient calculation.
AIM
To evaluate the efficacy of DLR for image quality improvement of FOCUS of the pancreas.
METHODS
This was a retrospective study evaluated 37 patients with pancreatic cystic lesions who underwent magnetic resonance imaging between August 2021 and October 2021. We evaluated three types of FOCUS examinations: FOCUS with DLR (FOCUS-DLR+), FOCUS without DLR (FOCUS-DLR−), and conventional FOCUS (FOCUS-conv). The three types of FOCUS and their apparent diffusion coefficient (ADC) maps were compared qualitatively and quantitatively.
RESULTS
FOCUS-DLR+ (3.62, average score of two radiologists) showed significantly better qualitative scores for image noise than FOCUS-DLR− (2.62) and FOCUS-conv (2.88) (P < 0.05). Furthermore, FOCUS-DLR+ showed the highest contrast ratio (CR) between the pancreatic parenchyma and adjacent fat tissue for b-values of 0 and 600 s/mm2 (0.72 ± 0.08 and 0.68 ± 0.08) and FOCUS-DLR− showed the highest CR between cystic lesions and the pancreatic parenchyma for the b-values of 0 and 600 s/mm2 (0.62 ± 0.21 and 0.62 ± 0.21) (P < 0.05), respectively. FOCUS-DLR+ provided significantly higher ADCs of the pancreas and lesion (1.44 ± 0.24 and 3.00 ± 0.66) compared to FOCUS-DLR− (1.39 ± 0.22 and 2.86 ± 0.61) and significantly lower ADCs compared to FOCUS-conv (1.84 ± 0.45 and 3.32 ± 0.70) (P < 0.05), respectively.
CONCLUSION
This study evaluated the efficacy of DLR for image quality improvement in reduced-FOV DWI of the pancreas. DLR can significantly denoise images without prolonging the scan time or decreasing the spatial resolution. The denoising level of DWI can be controlled to make the images appear more natural to the human eye. However, this study revealed that DLR did not ameliorate pancreatic distortion. Additionally, physicians should pay attention to the interpretation of ADCs after DLR application because ADCs are significantly changed by DLR.
PENINGKATAN KAPASITAS KEWIRAUSAHAAN MELALUI PENGEMBANGAN USAHA BERBASIS DIGITAL BAGI PEKERJA MIGRAN INDONESIA SALIMAH TAIWAN
Authors: Sary Fetty Poerwita , Tricahyono Dodie , Candiwan Candiwan 
Published: December 2023

Pengembangan kompetensi kewirausahaan merupakan salah satu aspek penting bagi sumber daya manusia. Hal ini juga disadari oleh Pekerja Migran Indonesia (PMI) di Taiwan untuk meningkatkan kompetensi tersebut saat kembali ke Indonesia serta meningkatkan kapabilitas digital agar dapat beradaptasi dengan perkembangan teknologi. Salah satu cara yang efektif untuk membangun kompetensi adalah dengan memanfaatkan platform digital. Bekerjasama dengan Salimah Taiwan, kegiatan pengabdian masyarakat (abdimas) ini bertujuan untuk mengembangkan kompetensi PMI yang merupakan anggota Salimah Taiwan. Metode yang digunakan dalam kegiatan abdimas ini terdiri dari enam tahap, yaitu Training Need Analysis (TNA), pembuatan materi, pelatihan, assesment, evaluasi dan pembuatan aplikasi. Luaran dari abdimas ini adalah pelatihan dan pengembangan aplikasi Salimah E-Course yang dapat digunakan dan diunduh oleh PMI. Implementasi kegiatan ini telah menunjukkan hasil positif. Melalui materi pelatihan yang diberikan terdapat peningkatan rata-rata kompetensi sebesar 17,85%. Sementara itu hasil evaluasi menunjukan feedback yang baik. Saran untuk kelanjutan kegiatan ini adalah perlunya memberikan pelatihan tambahan kepada para PMI agar mereka dapat termotivasi untuk belajar mandiri. Pelatihan tambahan ini dapat membantu mereka dalam mengembangkan kompetensi secara berkelanjutan dan mengikuti perkembangan teknologi. Selain itu, pengembangan materi pembelajaran tambahan juga dibutuhkan untuk memenuhi kebutuhan dan permintaan PMI. Dengan demikian, hal tersebut dapat memberikan manfaat yang lebih besar bagi PMI dalam meningkatkan kompetensi kewirausahaan dan mempersiapkan PMI dalam menghadapi tantangan masa depan.
PENINGKATAN NILAI PERUSAHAAN DARI SUDUT PANDANG CURRENT RATIO, RETURN ON ASSET, DEBT TO EQUITY RATIO DAN KEPEMILIKAN INSTITUSIONAL
Authors: Martini Martini 
Published: December 2023

Nilai perusahaan yang tinggi dapat meningkatkan kemakmuran bagi para pemegang saham. Perusahaan harus mampu meningkatkan harga saham perusahaannya sehingga para pemegang saham memilih untuk menginvestasikan modalnya pada perusahaan yang mereka kelola. Penelitian ini bertujuan untuk mengetahui pengaruh Current Ratio, Return On Asset, Debt to Equity Ratio dan Kepemilikan Institusional terhadap Nilai Perusahaan. Populasi dalam penelitian ini adalah perusahaan industri makanan olahan dan minuman yang terdaftar di Bursa Efek Indonesia (BEI) tahun 2017-2021 sebanyak 27 perusahaan. Teknik pemilihan sampel menggunakan teknik purposive sampling dan diperoleh jumlah sampel sebanyak 16 perusahaan. Data yang digunakan dalam penelitian ini diperoleh dari data laporan keuangan. Teknik analisis yang digunakan dalam penelitian ini adalah analisis regresi linear berganda dengan menggunakan program IBM SPSS Statistic. Hasil penelitian menunjukkan bahwa Current Ratio berpengaruh negatif dan signifikan terhadap Nilai Perusahaan, dan Return On Asset berpengaruh positif dan signifikan terhadap Nilai Perusahaan. Sedangkan Debt to Equity Ratio dan Kepemilikan Institusional tidak berpengaruh terhadap Nilai Perusahaan.
Dose-dependent regulation of kidney mitochondrial function by angiotensin II
Authors: Sivertsson Ebba , Balboa Amanda , Schiffer Tomas A , Hansell Peter , Friederich-Persson Malou , Persson Patrik , Palm Fredrik 
Published: December 2023

Background: Intrarenal hypoxia has been suggested a unifying pathway to chronic kidney disease (CKD) and increased mitochondria leak respiration, which increases mitochondrial oxygen usage and is one important mechanism contributing to the development of the hypoxia. Previous studies indicate that angiotensin II (Ang II) effects on mitochondria function could be dose dependent. We investigated how moderate and high levels of Ang II affect kidney mitochondria function and pathways of leak respiration.
Methods: C57 black 6 mice were treated with either vehicle or Ang II in low dose (400 ng/kg/min) or high dose (1,000 ng/kg/min) for 4 weeks. The function of kidney cortex mitochondria was measured by high-resolution respirometry. Ang II effects on gene expression in kidney tissue were measured by quantitative real-time PCR. Thiobarbituric acids reactive substances were determined as a marker of oxidative stress, and urinary protein excretion was measured as a maker of kidney injury.
Results: Low-dose Ang II induced overall mitochondria respiration, without compromising capacity of ATP production. Mitochondrial leak respiration was increased, and levels of oxidative stress were unchanged. However, high-dose Ang II decreased overall mitochondria respiration and reduced mitochondrial capacity for ATP production. Mitochondrial leak respiration was decreased, and oxidative stress increased in kidney tissue. Furthermore, gene expression of mediators that stimulate vasoconstriction and ROS production was increased, while components of counteracting pathways were decreased.
Conclusions: In conclusion, Ang II dose-dependently affects mitochondrial function and leak respiration. Thus, Ang II has the potential to directly affect cellular metabolism during conditions of altered Ang II signaling.
Habit Watching Movie With English Subtitles as an Alternative in Improving on Students' Reading Skill
Authors: Nadivah Nadivah , Suryadi Suryadi 
Published: December 2023

The objective of this study is to establish a correlation between the practice of watching English language films and the utilization of English subtitles as a substitute method to enhance students' English reading comprehension. The research was carried out at SMA Negeri 1 Tirtayasa. This study seeks to ascertain the extent to which students' comprehension improves by regularly watching English films with subtitles. The employed methodology is quantitative, focusing on a population of students in classes XII Science 1, 2, 3, and 4. Subsequently, a total of 76 students were included in the sample. The collected data pertains to the English reading comprehension test of the students. The independent variable in this study refers to the practice of watching English films with English subtitles, whereas the dependent variable pertains to the English reading comprehension skills of the students. The investigation yielded substantial data. The term "2-tailed" refers to a statistical test that considers both directions of an effect or relationship.The data acquired from the control class was 77.29, whereas the data from the experimental class was 79.63. Consequently, the treatment has had a notable impact on the kids' reading comprehension, resulting in a commendable level of proficiency. The employed methodology is highly effective in enhancing the students' English reading comprehension.