bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radiative Association between Neutral Radicals in the Interstellar Medium: CH3 + CH3O
Authors: Tennis Jessica , Loison Jean-Christophe , Herbst Eric 
Published: January 2023

Abstract
Uncertainties in the production mechanisms of interstellar complex organic molecules call for a precise investigation of gas-phase synthetic routes for these molecules, especially at low temperatures. Here, we report a study of the gas-phase formation of dimethyl ether from the neutral radicals methyl and methoxy via the process of radiative association. This process may be important to synthesize dimethyl ether and species such as methyl formate, for which dimethyl ether is a precursor. The reaction is found to be rapid by the standards of radiative association, especially at 10 K, where its rate coefficient is calculated by two different methods to be 3 × 10−11 or 2 × 10−10 cm3 s−1; the lower rate is calculated with a more precise theory and is likely more accurate. Insertion of this reaction into the Nautilus network is found not to explain fully the abundance of dimethyl ether in cold and prestellar cores, especially in those cores with the highest dimethyl ether abundances.
Monitoring Cometary Activity of 60P/Tsuchinshan During Its 2018–2019 Apparition
Authors: Shi Jianchun , Xu Ruiqi , Ma Yuehua , Hu Shoucun , Zhao Haibin , Li Fan , Yuan Ye 
Published: January 2023

Abstract
Comet 60P/Tsuchinshan is a Jupiter family comet. Since the discovery of 60P/Tsuchinshan, little research for cometary activity has been conducted on this comet, though it has returned to perihelion several times. To study the physical properties and activity characteristic of 60P/Tsuchinshan during its 2018–2019 apparition, we observed 60P/Tsuchinshan with broadband B, V, and R filters from 2018 November to 2019 March by using the 80 cm Yaoan High Precision Telescope at Yaoan Station of Purple Mountain Observatory, Chinese Academy of Sciences. Morphological analysis and photometric studies of 60P/Tsuchinshan were performed. The color indices, Af
ρ values, and dust production rates of 60P/Tsuchinshan were obtained. Morphological analysis showed that the comet was active and several images showed a spiral structure in the inner coma; this structure is regardless of the enhancement methods and cannot be explained by the rotation of 60P. The Af
ρ curve showed that the peak activity of 60P/Tsuchinshan was at about 10 days after perihelion. Compared to other Jupiter family comets at similar heliocentric distances, we found that 60P/Tsuchinshan was a very active comet. Dynamical analysis showed that 60P/Tsuchinshan’s perihelion distance was reduced from 1.77 to 1.62 au due to the close encounter with Jupiter that occurred on 2008 December 20; this may increase its activity in the next apparition.
A Highly Magnified Gravitationally Lensed Red QSO at z = 2.5 with a Significant Flux Ratio Anomaly
Authors: Glikman Eilat , Rusu Cristian E. , Chen Geoff C.-F. , Chan James Hung-Hsu , Spingola Cristiana , Stacey Hannah , McKean John , Berghea Ciprian T. , Djorgovski S. G. , Graham Matthew J. , Stern Daniel , Urrutia Tanya , Lacy Mark , Secrest Nathan J. , O’Meara John M. 
Published: January 2023

Abstract
We present the discovery of a gravitationally lensed dust-reddened QSO at z = 2.517, identified in a survey for QSOs by infrared selection. Hubble Space Telescope imaging reveals a quadruply lensed system in a cusp configuration, with a maximum image separation of ∼1.″8. We find that, compared to the central image of the cusp, the neighboring brightest image is anomalous by a factor of ∼7–10, which is the largest flux anomaly measured to date in a lensed QSO. Incorporating high-resolution Very Large Array radio imaging and submillimeter imaging with the Atacama Large Millimeter/submillimeter Array, we conclude that a low-mass perturber is the most likely explanation for the anomaly. The optical through near-infrared spectrum reveals that the QSO is moderately reddened with E(B − V) ≃ 0.7–0.9. We see an upturn in the ultraviolet spectrum due to ∼1% of the intrinsic emission being leaked back into the line of sight, which suggests that the reddening is intrinsic and not due to the lens. The QSO may have an Eddington ratio as high as L/L
Edd ≈ 0.2. Consistent with previous red QSO samples, this source exhibits outflows in its spectrum, as well as morphological properties suggestive of it being in a merger-driven transitional phase. We find a host galaxy stellar mass of

log

M

⋆

/

M

⊙

=
11.4

, which is higher than the local M
BH versus M
⋆ relation but consistent with other high-redshift QSOs. When demagnified, this QSO is at the knee of the luminosity function, allowing for the detailed study of a more typical moderate-luminosity infrared-selected QSO at high redshift.
Effects of Planetesimal Scattering: Explaining the Observed Offsets from Period Ratios 3:2 and 2:1
Authors: Ghosh Tuhin , Chatterjee Sourav 
Published: January 2023

Abstract
The observed deficit and excess of adjacent planet pairs with period ratios narrow and wide of 3:2 and 2:1, the nominal values for the corresponding mean-motion resonances (MMRs), have intrigued many. Previously, using a suite of simulations, Chatterjee & Ford showed that the excess above the 2:1 MMR can be naturally explained if planet pairs, initially trapped in the 2:1 MMR, dynamically interact with nearby planetesimals in a disk. We build on this work by (a) updating the census of discovered planet pairs, (b) extending the study to initially nonresonant as well as resonant planet pairs, (c) using initial planet and orbital properties directly guided by those observed, and (d) extending the initial period ratios to include both 2:1 and 3:2. We find that (1) interactions with planetesimals typically increase the period ratios of both initially resonant and nonresonant planet pairs; (2) starting from an initially flat period ratio distribution for systems across 3:2 and 2:1, these interactions can naturally create the deficits observed narrow of these period ratios; (3) a contribution from initially resonant planet pairs is needed to explain the observed levels of excess wide of 3:2; and (4) a mixture model where about 25% (1%) of planet pairs were initially trapped into 3:2 (2:1) MMRs is favored to explain both the observed deficit and excess of systems across these period ratios. However, up to a few percent of planet pairs are expected to remain in MMR today.
Light Curves and Event Rates of Axion Instability Supernovae
Authors: Mori Kanji , Moriya Takashi J. , Takiwaki Tomoya , Kotake Kei , Horiuchi Shunsaku , Blinnikov Sergei I. 
Published: January 2023

Abstract
It was recently proposed that exotic particles can trigger a new stellar instability that is analogous to the e
−
e
+ pair instability if they are produced and reach equilibrium in the stellar plasma. In this study, we construct axion instability supernova (AISN) models caused by the new instability to predict their observational signatures. We focus on heavy axion-like particles (ALPs) with masses of ∼400 keV–2 MeV and coupling with photons of g

a
γ
∼ 10−5 GeV−1. It is found that the 56Ni mass and the explosion energy are significantly increased by ALPs for a fixed stellar mass. As a result, the peak times of the light curves of AISNe occur earlier than those of standard pair-instability supernovae by 10–20 days when the ALP mass is equal to the electron mass. Also, the event rate of AISNe is 1.7–2.6 times higher than that of pair-instability supernovae, depending on the high mass cutoff of the initial mass function.
Photons’ Scattering in Relativistic Plasma with Velocity Shear: Generation of High Energy Power-law Spectra
Authors: Vyas Mukesh K. , Pe’er Asaf 
Published: January 2023

Abstract
A high energy power law is a common feature in the spectra of many astrophysical objects. We show that the photons in an unmagnetized relativistic plasma composed of electrons and protons with a variable Lorentz factor (or a velocity shear) go through repeated scattering with electrons to gain energy. The escaped population of photons naturally produces a power-law-shaped spectrum making it a photon’s analog to the conventional Fermi acceleration mechanism for charged particles. Thus, this mechanism provides a natural alternative to current explanations of high energy power-law spectra via synchrotron or thermal Comptonization. The model is applicable to any relativistic plasma beam with an arbitrary Lorentz factor profile. We implement the theory to the gamma-ray burst prompt phase and show that the obtained range of the photon indices is compatible with the observed values and the results of Monte Carlo simulations that we carry out independently. Therefore, the observed high energy spectral indices provide a unique indicator of the jet structure.
An Ancient Martian Dynamo Driven by Hemispheric Heating: Effect of Thermal Boundary Conditions
Authors: Yan Chi , Barik Ankit , Stanley Sabine , Leung Jason S.-Y. , Mittelholz Anna , Johnson Catherine L. , Plesa Ana-Catalina , Rivoldini Attilio 
Published: January 2023

Abstract
Magnetic field observations from the MGS, MAVEN, and InSight missions reveal that a dynamo was active in Mars’s early history. One unique feature of Mars’s magnetic crustal field is its hemispheric dichotomy, where magnetic fields in the southern hemisphere are much stronger than those in the northern hemisphere. Here we use numerical dynamo simulations to investigate the potential hemispheric nature of Mars’s ancient dynamo. Previous studies show that a hemispheric heat flux perturbation at the core–mantle boundary could result in either a stable hemispherical magnetic field or a constantly reversing field, depending on choices of parameters used in those models. These two scenarios lead to different implications for the origin of crustal fields. Here we test the dynamo sensitivity to varying hemispheric heat flux perturbations at the core–mantle boundary in a broader parameter regime to understand whether a hemispheric dynamo is likely for early Mars. We find that features of the dynamo change from stable, hemispheric magnetic fields to reversing, hemispheric fields, with increasing hemispheric heat flux perturbations at the core–mantle boundary. We also find that magnetic fields powered by bottom heating are more stable and transition from a nonreversing, hemispheric magnetic field to a multipolar field at higher hemispheric heat flux perturbations, while the transition happens at a much lower heat flux perturbation for magnetic fields powered by internal heating.
Comparison of blood biochemical parameters of four species of vultures
Authors: Petrov Rusko , Yarkov Dobri , Chaprazov Tsvetan , Andonova Yana , Dimitrova Stefka , Lazarova Ivanka 
Published: January 2023

Vultures play a very important role in ecosystems by feeding on dead animals and preventing the spread of pathogens. In the mid-20thcentury in Bulgaria, all species of vultures experienced a rapid population decline and conservation measures include captive breeding and release via adaptation aviaries. Knowledge of the baseline blood biochemical parameters is crucial for the care, rehabilitation and prior to the release of endangered birds of prey. Plasma levels provide valuable information for the evaluation of the physical condition of animals.Between 2020 and 2022, we took blood samples from captive Bearded, Griffon, Cinereous and Egyptian Vultures in Bulgaria (n = 118). We determined the values of 18 parameters - alanine transaminase, albumin, alkaline phosphatase, amylase, aspartate transaminase, calcium, chloride, cholesterol, creatine kinase, creatinine, glucose, lactate dehydrogenase, magnesium, phosphorus, total bilirubin, total protein, triglycerides and uric acid. This research determined the mean blood biochemical indices for aviary Bearded, Griffon, Cinereous and Egyptian Vultures in Bulgaria and compared the values amongst the four vulture species, to serve in determining clinical pathology and nutrition for scavenger birds of different species, age groups and genders in the country.The results of this study suggested that there are significant differences between many of the indicators of the four vulture species. There are fewer differences in the indicators of different ages of birds of a given species and almost no differences are found between the two sexes of a species. These values could be used by scientists, veterinary pathologists, wildlife rehabilitation centres and other researchers. Furthermore, the use of such parameters in assessing population health may enable conservationists to further research environmental conditions affecting the vultures’ reproduction and survival.
Density of Axis Deer in Texas: Management Implications for Native White-tailed Deer and Associated Habitats
Authors: Buchholz Matthew J. , Conway Warren C. , Arsuffi Thomas L. , Lockwood Mitch L. , Grisham Blake A. 
Published: January 2023

AbstractAxis deer Axis axis have been widely introduced to new geographic ranges, and in the United States, free-ranging axis deer have become well established in the Edwards Plateau ecoregion as well as other portions of Texas. However, no estimates of axis deer population density nor size have been conducted since 1994. It is hypothesized that axis deer on the Edwards Plateau are potentially competing with native white-tailed deer Odocoileus virginianus for food, space, and habitat resources, and causing damage to important riparian habitats. Our goal was to estimate regional densities of axis deer and white-tailed deer, and provide insight about the potential impacts axis deer may have on native wildlife and their habitats. Estimated using distance sampling techniques in 2018 and 2019, average axis deer density was 19.7 (95% CI: 14.1–25.6) axis deer/km2 compared with 23.0 (95% CI: 18.2–27.5) white-tailed deer/km2, and axis deer densities ranged from 16.9 to 171.0/km2 among eight different land cover types in Kimble County, Texas, with a county-wide estimate of 61,078 (95% CI: 30,407–100,369) axis deer. Axis deer densities were greatest in riparian land cover types, and they selected for two riparian land cover types and upland grasslands. Axis deer population estimates clearly indicate their population size has increased substantially since introduction to Texas in the 1930s. Population management of axis deer is warranted to limit impacts to native wildlife from potential habitat usurpation, or damage to riparian vegetation communities, soil, and water quality.
Un programme de recherche pour la transition sociale et écologique de Montréal
Authors: Audet René , Brisebois Éliane , Butzbach Camille , El-Khoury Joseph , Lefebvre Béatrice , Lessard Guillaume , Mercille Geneviève , Purdon Mark , Scherer Katia , Stamm Christoph B. , Neste Sophie L. Van 
Published: January 2023

S’inscrivant dans une communauté scientifique grandissante qui cherche et expérimente des solutions urbaines aux problèmes sociaux et écologiques, la Chaire de recherche UQAM sur la transition écologique a pour mission d’étudier et d’accompagner les transformations en cours en s’intéressant plus particulièrement aux expérimentations portées par les acteurs locaux et urbains de la transition sociale et écologique, ainsi qu’aux changements institutionnels inspirés de ces innovations. Cet article présente les travaux de ses membres selon une grille portant sur les questions centrales du programme de la Chaire, soit l’approfondissement des connaissances sur les transformations, la pérennisation des initiatives de transition et la structuration d’un champ institutionnel de la transition. Fondés sur des approches de recherche participative et partenariale, ces travaux menés dans la région montréalaise s’inscrivent dans trois « chantiers de la transition » : l’urgence climatique, les milieux de vie et les systèmes alimentaires. Cet article montre comment, en s’associant avec les acteurs de la transition sociale et écologique montréalaise, les chercheuses et chercheurs de la Chaire contribuent à clarifier et à mettre en place certains fondements de la transition sociale et écologique.
KERJASAMA PERDAGANGAN MINYAK CHINA ARAB SAUDI DI TENGAH POLITIK PEMOTONGAN PRODUKSI MINYAK OPEC
Authors: Andi Ismira  , Yulia Gitra  , Riady Ibnu Khaldun  , Sriwiyata Ismail  
Published: January 2023

China bergantung pada impor minyak dari negara-negara produsen minyak karena untuk menopang pertumbuhan ekonomi. Salah satunya Arab Saudi yang sejak lama telah menjalin kerjasama perdagangan minyak dengan China. Penelitian ini menggunakan konsep The Politics Of Oil dan kerjasama bilateral dengan data sekunder dengan menggunakan metode penelitian kualitatif. Adapun hasil dari penelitian ini yaitu dampak kebijakan pemotongan produksi minyak OPEC terhadap kerjasama perdagangan minyak China-Arab Saudi adalah terjadinya perlambatan ekspor minyak Arab Saudi ke China selama tiga tahun berturut-turut sehingga China yang bergantung pada impor minyak harus meningkatkan impor minyak dari negara lain seperti Rusia yang mengambil alih posisi Arab Saudi sebagai pemasok minyak terbesar ke China, Sehingga Arab Saudi merasa khawatir hal itu akan mengganggu kerjasama perdagangan minyaknya dengan China. Adapun strategi untuk meningkatkan kerjasama perdagangan minyak China Arab Saudi dengan meningkatkan investasi untuk membangun kerjasama dalam jangka waktu yang panjang dan hal itu membuat ekspor minyak Arab Saudi ke China secara bertahap pulih dan meningkatkan volume perdagangan untuk menciptakan ketergantungan perdagangan yang menguntungkan bagi China dan Arab Saudi.
ANALISIS NILAI-NILAI RELIGIUS DALAM FILM OMAR & HANA
Authors: Arini Widya Dewi , Baharuddin Baso Helmi 
Published: January 2023

The purpose of this research is to find out and describe the religious values in the film Omar & Hana. This study uses library research methods, with the type of research that is library research. Based on the analysis that has been done, it can beconcluded that the religious values in the film Omar & Hana can be categorized into several values, namely: 1) the value of faith, in the episode "let's give greetings" explains about strengthening friendship; the episode "everything is worship" explains about intending all that is done for Allah swt; the first halal episode explains about viewing a food or beverage halal certificate; the pillars of Islam episode explains that the pillars of Islam are the pillars of religion; our friend's al-Quran episode explains about making the Koran a friend wherever you are. 2) moral values, in the episode "let's give greetings" explains commendable morals in which greetings are exchanged; the episode "everything is worship" explains commendable morals intending all work for Allah swt; Halal episode to explain commendable morals by first viewing the halal logo and certificate for food or beverages; the pillars of Islam episode describes commendable morals in which the pillars of Islam are the pillars of religion; episode al-Quran Kawan Kita explains about commendable morals so that humans make the Koran as a friend throughout their life. 3) The value of Worship in the episode "let's give greetings" explains mahdah worship or actions that are determined by conditions and pillars; the episode "everything is worship" explains mahdah worship intending all work only for Allah swt; the halal ke episode explains about the worship of ghairumahdah, an act that brings goodness and is carried out with sincere intentions because of Allah swt; the episode of the pillars of Islam explains about the worship of mahdah; the pillars of Islam are the pillars of religion; our friend's al-Quran episode explains about mahdah worship making it a human friend at all times
MicroRNA-122-5p inhibits inflammation and fibrosis in mice with acute pancreatitis by upregulating APOE level by binding to HDAC1
Authors: Yan Lu , Peng Jie , Wang Meng , Guo Zimeng , Huang Haosu , Gu Huan 
Published: January 2023

IntroductionThis research was designed to ascertain the mechanism of miR-122-5p in alleviating the inflammation and fibrosis of acute pancreatitis (AP) mice.Material and methodsAP mouse or cell model was established by caerulein (CAE) treatment. The coefficient of pancreas was evaluated and the expression levels of amylase (AMS) and lipase were measured by kit. The pathological changes of pancreatic tissues were observed under hematoxylin-eosin (H&E) staining. The expression levels of fibrous proteins (α-SMA and Collagen Ⅰ) were detected. The expression levels of related inflammatory factors (IL-1β, IL-6, and TNF-α) were tested by ELISA. The correlations between miR-122-5p and HDAC1 or between HDAC1 and APOE were predicted and validated.ResultsIn AP mice or cells, the coefficient of pancreas was elevated (P < 0.01), and the AMS expression was increased (P < 0.001) while lipase expression was decreased (P < 0.05). The pathological structural change was obvious and the Rongione score was elevated (P < 0.001). The expression levels of α-SMA and Collagen Ⅰ were stimulated (P < 0.05), and the levels of IL-1β, IL-6, and TNF-α were enhanced (P < 0.001). miR-122-5p negatively regulated HDAC1 expression and HDAC1 inhibited APOE transcription. Overexpression of miR-122-5p or APOE could both reduce the inflammation and fibrosis in AP mice or cells but upregulation of HDAC1 or APOE inhibition reversed the inhibiting effect of miR-122-5p overexpression on CAE-induced inflammation and fibrosis.ConclusionsConclusively, miR-122-5p inhibited inflammation and fibrosis in an AP mouse model by the HDAC1/APOE axis.
Participación ciudadana y gobernabilidad democrática en gobiernos locales
Authors: Vílchez-Vargas Nilber 
Published: January 2023

El presente estudio analizó la participación ciudadana en los gobiernos locales para alcanzar una gobernabilidad democrática que permita una adecuada gestión municipal, por tanto, tuvo por objetivo determinar las características de la participación ciudadana y gobernabilidad democrática de los gobiernos locales de la provincia de Mariscal Cáceres; mediante el diseño descriptivo, y el cuestionario como instrumento, aplicado a 90 trabajadores municipales y 362 ciudadanos; el registro de observación aplicado en las áreas administrativas de las cinco municipalidades y la pauta de entrevista, aplicado a los cinco alcaldes. Los resultados demostraron que, tanto la participación ciudadana y gobernabilidad democrática en la mayoría de sus dimensiones se encuentran en un nivel intermedio. Concluyendo que, los gobiernos locales tienen una media participación ciudadana y gobernabilidad democrática que amerita una propuesta de inversión que genere una mayor gobernanza.
Estudio prospectivo de los sistemas agropecuarios con componente vacuno en el distrito de Cuñumbuqui, provincia de Lamas, región San Martín
Authors: Sánchez-Huaripata Marco , Arévalo-Arévalo Carlos Enrique 
Published: January 2023

El objetivo fue evaluar los factores involucrados en el proceso productivo que afectan los sistemas agropecuarios de producción con componente de ganado vacuno en el distrito de Cuñumbuqui, provincia de Lamas, región San Martín. El tipo de investigación es de tipo básica descriptiva, en la que se desarrolló el formato o estructura de las encuestas y visitas de campo, para ello, se realizaron coordinaciones preliminares con autoridades locales o líderes de las localidades en estudio, así como también los productores seleccionados a quienes se les denominó informantes. Se trabajó con una muestra perteneciente a tres asociaciones de productores: APROAC: Asociación de Productores Agropecuarios la Campiña (28 socios - Cuñumbuqui), Asociación de Ganaderos de Zapatero (14 socios - Zapatero) y Asociación de Ganaderos La Pinta (14 socios - Cuñumbuqui), correspondientes a productores agropecuarios que actualmente manejan este sistema de producción, de los cuales se descartó 5 ganaderos al no cumplir con las características deseadas para el presente trabajo, con un total de 51 productores. Por lo tanto, se acepta la hipótesis en la cual se sugiere que existen factores involucrados en el proceso productivo que determinan las características de los sistemas agropecuarios con componente de ganado vacuno.