bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Intrinsic Statistical Properties and Correlations of Short Gamma-Ray Bursts
Authors: Zhu Si-Yuan , Liu Zhi-Ying , Shi Yong-Rui , Ding Xiao-Kang , Sun Wan-Peng , Zhang Fu-Wen 
Published: June 2023

Abstract
The intrinsic statistical properties and correlations of short gamma-ray bursts (SGRBs) have not been fully determined, due to the limitations of observations. In this paper, we compile a more extensive sample of 82 SGRBs with measured redshifts and present a comprehensive study of their intrinsic characteristics. We obtain the median values of the intrinsic duration (T
90,z), peak energy (E
p,z), isotropic energy (E
iso), and peak luminosity (L
iso) as 0.47 s, 466 keV, 8.21 ×1050 erg, and 3.22 × 1051 erg s−1, respectively. We update the spectrum–energy correlations, and report

E

p
,
z

∝

E

iso

0.36
±
0.05

and

E

p
,
z

∝

L

iso

0.33
±
0.04

, which further confirm the previous results that the E
p,z–E
iso correlations of SGRBs and long gamma-ray bursts (LGRBs) are different and that this correlation can be used to distinguish GRB types. We report for the first time that there is a tighter correlation between the isotropic energy of the prompt emission of SGRBs and the star formation rate of their host galaxies, which reads

sSFR
∝

E

iso

0.38
±
0.11

. Using the measured jet break time (t
jet) of 11 SGRBs, we tentatively investigate the E
iso–E
p,z–t
jet,z and L
iso–E
p,z–t
jet,z correlations of SGRBs and find that three-parameter correlations of SGRBs also exist and are different from those of LGRBs. Based on the E
iso–E
p,z–t
jet,z correlation, we estimate the t
jet,z values of other SGRBs and calculate the opening angles of SGRBs. We find that the median value of the SGRB opening angle is 7.°5, which is larger than that of LGRBs.
Multicollision Internal Shock Lepto-hadronic Models for Energetic Gamma-Ray Bursts (GRBs)
Authors: Rudolph Annika , Petropoulou Maria , Bošnjak Željka , Winter Walter 
Published: June 2023

Abstract
For a subpopulation of energetic gamma-ray bursts (GRBs), a moderate baryonic loading may suffice to power ultra-high-energy cosmic rays (UHECRs). Motivated by this, we study the radiative signatures of cosmic-ray protons in the prompt phase of energetic GRBs. Our framework is the internal shock model with multicollision descriptions of the relativistic ejecta (with different emission regions along the jet), plus time-dependent calculations of photon and neutrino spectra. Our GRB prototypes are motivated by Fermi-Large Area Telescope-detected GRBs (including GRB 221009A) for which further, owing to the large energy flux, neutrino nonobservation of single events may pose a strong limit on the baryonic loading. We study the feedback of protons on electromagnetic spectra in synchrotron- and inverse Compton-dominated scenarios to identify the multiwavelength signatures, to constrain the maximally allowed baryonic loading, and to point out the differences between hadronic and inverse Compton signatures. We find that hadronic signatures appear as correlated flux increases in the optical-UV to soft X-ray and GeV–TeV gamma-ray ranges in the synchrotron scenarios, whereas they are difficult to identify in inverse Compton-dominated scenarios. We demonstrate that baryonic loadings around 10, which satisfy the UHECR energetic requirements, do not distort the predicted photon spectra in the Fermi Gamma-Ray Burst Monitor range and are consistent with constraints from neutrino data if the collision radii are large enough (i.e., the time variability is not too short). It therefore seems plausible that under the condition of large dissipation radii a population of energetic GRBs can be the origin of the UHECRs.
ALMA View of the High-velocity-dispersion Compact Cloud CO 0.02–0.02 at the Galactic Center
Authors: Iwata Yuhei , Oka Tomoharu , Takekawa Shunya , Tsujimoto Shiho , Enokiya Rei 
Published: June 2023

Abstract
We report the results of observations toward the center of the molecular cloud CO 0.02–0.02 made using the Atacama Large Millimeter/Submillimeter Array. The successfully obtained 1″ resolution images of CO J = 3–2, H13CN J = 4–3, H13CO+
J = 4–3, SiO J = 8–7, CH3OH J

K

a

,

K

c

= 71,7–61,6 A+ lines, and 900 μm continuum show several new features, which have not been identified in previous observations. The dense gas probe (H13CN, SiO, CH3OH) images are dominated by a pair of northeast-southwest elongated filaments, which may be the main body of CO 0.02–0.02. Two striped patterns perpendicular to each other (F1 and F2) and a high-velocity feature (HV), which appear in different velocity ranges, were prominent in the CO image. An emission hole that may represent an expanding feature was found in the F1 velocity range. F2 appeared to align along the western edge of a 20 pc × 13 pc ellipse (the Large Shell) identified in the single-dish CO map. The HV contains eight compact clumps at the positive high-velocity end of the CO emissions. Based on these results, we propose a formation scenario for CO 0.02–0.02; internal explosions of supernovae, external perturbations by the Large Shell, and gravitational acceleration by a less-luminous star cluster have formed CO 0.02–0.02 in its current state.
Near-infrared and Optical Observations of Type Ic SN 2021krf: Luminous Late-time Emission and Dust Formation
Authors: Ravi Aravind P. , Rho Jeonghee , Park Sangwook , Park Seong Hyun , Yoon Sung-Chul , Geballe T. R. , Vinkó Jozsef , Tinyanont Samaporn , Bostroem K. Azalee , Burke Jamison , Hiramatsu Daichi , Howell D. Andrew , McCully Curtis , Newsome Megan , Gonzalez Estefania Padilla , Pellegrino Craig , Cartier Regis , Pritchard Tyler , Andersen Morten , Blinnikov Sergey , Dong Yize , Blanchard Peter , Kilpatrick Charles D. , Hoeflich Peter , Valenti Stefano , Filippenko Alexei V. , Suntzeff Nicholas B. , Seok Ji Yeon , Könyves-Tóth R. , Foley Ryan J. , Siebert Matthew R. , Jones David O. 
Published: June 2023

Abstract
We present near-infrared (NIR) and optical observations of the Type Ic supernova (SN Ic) SN 2021krf obtained between days 13 and 259 at several ground-based telescopes. The NIR spectrum at day 68 exhibits a rising K-band continuum flux density longward of ∼2.0 μm, and a late-time optical spectrum at day 259 shows strong [O i] 6300 and 6364 Å emission-line asymmetry, both indicating the presence of dust, likely formed in the SN ejecta. We estimate a carbon-grain dust mass of ∼2 × 10−5
M
⊙ and a dust temperature of ∼900–1200 K associated with this rising continuum and suggest the dust has formed in SN ejecta. Utilizing the one-dimensional multigroup radiation-hydrodynamics code STELLA, we present two degenerate progenitor solutions for SN 2021krf, characterized by C–O star masses of 3.93 and 5.74 M
⊙, but with the same best-fit 56Ni mass of 0.11 M
⊙ for early times (0–70 days). At late times (70–300 days), optical light curves of SN 2021krf decline substantially more slowly than those expected from 56Co radioactive decay. Lack of H and He lines in the late-time SN spectrum suggests the absence of significant interaction of the ejecta with the circumstellar medium. We reproduce the entire bolometric light curve with a combination of radioactive decay and an additional powering source in the form of a central engine of a millisecond pulsar with a magnetic field smaller than that of a typical magnetar.
La CED, péché originel de la défense européenne ?
Authors: Raflik Jenny 
Published: June 2023

Depuis l’échec du projet de Communauté européenne de défense, en août 1954, les pays européens ont exploré de multiples pistes pour tenter de construire une « Europe de la défense », mais avec des succès très mitigés. L’échec de la CED a-t-il pesé sur les tentatives suivantes ? C’est l’hypothèse de cette communication, qui tentera de mettre en avant quelques écueils nés de la querelle de la CED sur lesquels ont buté les projets d’Europe de la défense depuis 1954, et notamment trois problématiques récurrentes : celle du lien entre Europe de la défense et OTAN ; celle des frontières géographiques de l’Europe à construire ; et enfin les contradictions de la politique française.
COVID-19 Vaccination and Community Management: A Qualitative Study
Authors: Fernández-Basanta Sara , López-Villasenín Silvia , Freijomil-Vázquez Carla , Movilla-Fernández María-Jesús , Coronado Carmen 
Published: June 2023

Background:
Nurses play key roles as vaccination agents and frontline workers who deal with prejudice and misinformation. This study examined the attitudes and perceptions of nursing students regarding corona-virus disease 2019 (COVID-19) vaccination and its social and institutional management.

Method:
This qualitative study consisted of an exploratory phase involving first- and fourth-year nursing students and a second phase using the PhotoVoice tool SHOWED mnemonic method followed by discussion groups with second-year nursing students.

Results:
Three themes emerged: (1) hope tinged with fear; (2) too much information generating fear, uncertainty, and mistrust; and (3) leaders without recognition or voice.

Conclusion:

The results inform the body of knowledge in nursing science and enhance changes in clinical practice by providing new insights regarding the perceptions of nursing students on vaccination and its management, highlighting the need to train future nurses in health literacy and new ways to interact with community members.

[
J Nurs Educ
. 2023;62(6):343–350.]
Evaluation of Dog Presence as a Therapeutic Classroom Intervention
Authors: Bultas Margaret W. , Rittiwong Tanapa 
Published: June 2023

Background:
The American Association of Colleges of Nursing has called on nurse educators to increase mental health support for nursing students. Animal visit programs reduce stress, anxiety, and negative mental health feelings; however, most are intermittent and occasional. This pilot study explored the feasibility, acceptability, and outcomes of integrating a therapy dog into the classroom.

Method:
This pretest-posttest, two-group design study included 67 baccalaureate nursing students. Two sections of a course were taught: one section included a therapy dog and one section did not.

Results:
At the end of the course, participants in the intervention group showed improvement in stress, anxiety, and happiness, whereas participants in the control group did not demonstrate any improvement. Students reported positive feelings and benefits from the presence of the therapy dog.

Conclusion:

Integrating a trained therapy dog into the classroom is both feasible and acceptable, with students identifying positively with the experience.

[
J Nurs Educ
. 2023;62(6):355–358.]
Prevalence of Metabolic Syndrome in the Adult Population of Urban Areas of Rishikesh, Uttarakhand
Authors: Dakshinamurthy Senkadhirdasan , Saxena Vartika , Kumari Ranjeeta , Mirza Anissa Atif , Dhar Minakshi , Mishra Ashutosh 
Published: June 2023

Background:
Metabolic syndrome (MetS) is rising in Indian population. MetS is less studied in Uttarakhand which has embraced modern culture and lifestyle. Hence, we aimed to study the prevalence and determinants of MetS.

Aim and Objectives:
(1) To determine the prevalence of MetS in the adult population (19–60 years) in urban areas of Rishikesh. (2) To determine the association of sociodemographic variables and risk factors with MetS.

Materials and Methods:
A community-based cross-sectional study was conducted in an urban area of Rishikesh. WHO steps instrument and protocol were used for the assessment of risk factors and measurements. Five milliliters of blood sample was collected for estimation of Fasting Blood sugar (FBS), triglycerides, and high-density lipoprotein. Sample size was calculated to be 478 (P = 34.3%, design effect = 2.0, drop out 5%, and relative precision = 18%). Data were analyzed using SPSS Version 20.0. Appropriate statistical tests for bivariate and multivariate analysis were done. P <0.05 was considered significant.

Results:
The prevalence of MetS in the urban area of Rishikesh is 38.2%. The prevalence of MetS in males and females is 33.9% and 40.5%, respectively.

Conclusions:
About 442 subjects had either one or more abnormal components of the MetS as classified by the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) criteria. MetS prevalence was found to be higher in females than males. Prevalence was found higher in individuals belonging to the 41–50 years of age group.
Hypertension and its Risk Factors among College Students of Jodhpur, Rajasthan
Authors: Meena Balram , Kumar Ashok , Joshi Nitin Kumar , Jain Yogesh Kumar , Mingwal Mrinalini , Bhardwaj Pankaj 
Published: June 2023

Background:
High blood pressure (BP) in adolescents and young adults is a rising concern in today’s world. Behavioral factors largely contribute toward the development of hypertension. Once these are established, they often persist throughout life, and if identified timely, might play a significant role in prevalence reduction. This study was conducted to assess the prevalence and association of hypertension and its risk factors in college students of Jodhpur district.

Methodology:
A cross-sectional study was conducted in ten colleges across five zones of Jodhpur district using modified WHO STEPS questionnaire and by taking physical measurements of BP, height, and weight. Descriptive analysis was done using means and percentages, and statistical significance was established using prevalence odds ratio (POR).

Results:
Of the 421 study participants, 251 (59.60%) were males and 170 (40.20%) were females, with a mean age of 20.12. The prevalence of risk factors and significant association were observed between gender and educational level with behavioral habits. Further, hypertension prevalence (16.15%) was found to be associated with smoking (POR = 2.72), high salt intake (POR = 3.21), physical activity (POR = 0.30), overweight (POR = 2.34), and obese body mass index (POR = 4.02).

Conclusion:
The study provided evidence of high prevalence of hypertension and its associated behavioral risk factors such as tobacco, salt, and physical inactivity. Such evidences may be utilized for health promotion programs for the specific age group and region.
Risk Factor for Health Care Workers Developing Hypertension: A Nested Case-Control Study
Authors: Bal Deepti , Kirubakaran Henry , Chacko Sujith Thomas , Visalakshi Jeyaseelan , Muliyil Jayaprakash , Sudarsanam Thambu David 
Published: June 2023

Background and Objectives:
The study was aimed to evaluate the role of stress, lifestyle as well as traditional risk factors in the development of hypertension among health-care workers (HCWs).

Methods:
This nested case–control study was done at a tertiary care university teaching hospital in South India. Cases were hospital employees diagnosed with hypertension and who were taking antihypertensive medications. Controls were age- and sex-matched HCWs who were not diagnosed with hypertension. They were identified preferably in the same department where its case was presently working. One hundred and twenty-eight cases and 128 controls were enrolled. We collected data on risk factors for hypertension, physical activity, diet, and stress. Those significant on the bivariate analysis were entered into a logistic regression analysis.

Results and Interpretation:
In the logistic regression, we found that living in a joint family (2 siblings and their families), family history of hypertension, family history of diabetes mellitus, and family history of ischemic heart disease were independently predictive of hypertension developing in the study HCWs. Occasional or regular walking/cycling to work and milk consumption were independent factors that protected against the development of hypertension. Extra added salt to food and stress more than normal in any domain tested were not associated with the development of hypertension in our cohort.

Conclusions:
HCWs have some novel and other similar risk factors to general population for developing hypertension. Simple preventive measures seem effective. Neither stress nor self-reported salt consumption seemed to play a role in the development of hypertension.
Rechazos espurios de los test de Dickey-Fuller en presencia de una ruptura bajo la hipótesis nula endógenamente determinada
Authors: Badillo Amador Rosa , Belaire Franch Jorge , Reverte Maya Carmelo 
Published: June 2023

Leybourne et al. (1998) muestran el cumplimiento del denominado “fenómeno inverso de Perron” cuando se aplican los test convencionales de Dickey-Fuller para determinar el orden de integración de una serie temporal. Este fenómeno consiste en que, si el verdadero proceso generador es I(1) pero con una ruptura, pueden producirse rechazos espurios frecuentes de la hipótesis nula. Aunque Leybourne et al. (1998) sugieren que sería apropiado utilizar procedimientos en los que la ruptura sea tratada como endógena, ellos la consideran como exógena. Así, este trabajo analiza si sus resultados cambian cuando la ruptura estructural se determina endógenamente, es decir, a partir de los datos. En este sentido, aplicando el procedimiento tDF recursivo a un proceso de raíz unitaria con una ruptura en el nivel, no encontramos prácticamente evidencia del “fenómeno inverso de Perron”. Para el resto de procedimientos de endogeneización (rolling y secuencial) y para los dos tipos de rupturas considerados (en nivel o en deriva) encontramos, en línea con Leybourne et al. (1998), alguna distorsión en el tamaño del test tDF de Dickey-Fuller, la cual depende de la magnitud de la ruptura, de su ubicación en la muestra y del tamaño de la misma.
Economía artificial: una valoración crítica
Authors: Izquierdo Segismundo S. , Izquierdo Luis R. , Galán José M. , Santos José I. 
Published: June 2023

La economía artificial es uno de los métodos o enfoques de investigación para el estudio de sistemas socioeconómicos complejos con mayor crecimiento durante los últimos años. Este artículo presenta una visión crítica sobre sus características, su potencial y los riesgos relativos al uso de esta metodología. Para ello, encontramos útil relacionar y comparar a la economía artificial con la economía teórica más tradicional. Desde nuestro análisis, la economía teórica y la economía artificial comparten los mismos objetivos, presentan menos diferencias metodológicas de las que a primera vista pudiera parecer, y sus aproximaciones son sin duda complementarias.
Mercados cambiarios y tipos de cambio de Asia y Latinoamérica: sincronización de largo plazo, cambios estructurales y choques estocásticos
Authors: Ruiz Porras Antonio , Fregoso Becerra Luis Enrique 
Published: June 2023

Se estudian econométricamente los mercados cambiarios y los tipos de cambio de Asia y Latinoamérica. Se utilizan análisis de cambio estructural endógeno y de cointegración y funciones de impulso-respuesta. Los hallazgos indican que: 1) la sincronización de largo plazo de los mercados cambiarios es baja; 2) no hay evidencia de sincronización en los mercados asiáticos; 3) un choque estocástico en un país latinoamericano tiene efectos de mayor magnitud y duración que un choque similar en un país asiático; y 4) no hay evidencia de que la Crisis Financiera Global haya inducido cambios estructurales en las dinámicas de los tipos de cambio. Se usan los tipos de cambio spot diarios de Argentina, Brasil, Chile, China, Colombia, Corea del Sur, India, Malasia, México y Tailandia, para el periodo del 5 de agosto de 2002 al 22 de enero de 2016.
Volatility Linkages between Agricultural Commodity Prices, Oil Prices and Real USD Exchange Rate
Authors: Guellil Mohammed Seghir , Belmokaddem Mostéfa , Benbouziane Mohamed 
Published: June 2023

This study examines the dynamic nexus betwixt oil prices, twenty-two world agricultural commodity prices and given the evolution of the relative strength of the US dollar in a panel setting. We use panel cointegration and Panel Granger causality methods for a panel of twenty-two agricultural products based on annual observations ranging from 1980 to 2015. The empirical results provide a strong evidence of long-term relationship between Agricultural Commodity Prices, Oil Prices and Real USD Exchange Rate. Contrary to the findings of many studies in the literature that report neutrality of agricultural prices to oil price changes, we find strong support of bi-directional causal linkages among Agricultural Commodity Prices, Oil Prices and Real USD Exchange Rate. The long-run causality analysis thereby implies that the oil prices and the dollar have a predictive power to forecast the agricultural prices, which could be a good tool to prioritize the allocation of resources across industries to ensure agricultural scenario in general and economic outcomes.
Tinjauan Sukuk Korporasi di Indonesia dari Perspektif Penawaran, Permintaan dan Regulasi
Authors: Dewi Divina Mahardika , Nugroho Lucky , Sukmadilaga Citra , Fitijanti Tettet 
Published: June 2023

Sukuk is one of the most active money market investment instruments to date, which provides opportunities for Muslim and non-Muslim investors to invest. Similarly, corporate Sukuk has opportunities to continue to grow. This study proposes to determine the challenges and strategies in developing corporate Sukuk in Indonesia. The research focuses on three aspects, namely, aspects of supply, demand, and regulatory aspects. The benefits of this research can be a policy extension and a reference to encourage the growth of corporate Sukuk in the long period
Relationship between Plumage Colour and Egg Production Traits in Native Chicken
Authors: DODAMANI SHRIKANT , SAGAR VIDYA , NAVEEN KUMAR S , WAGHMARE PRASHANT , BIRADAR SATISHCHANDRA , MEENAXI  , BHATAMBRA PALLAVI 
Published: June 2023

Present study was conducted in Bidar district of Karnataka, where 150 eggs were collected from surrounding five different villages. The eggs were hatched with 67% hatchability. Chicks were reared with all standard managemental practices. Twenty healthy female birds of different plumage colour namely brown, black and black with yellow tinge were selected and separated into three different pens before the laying stage (at 16th week). The first lay was observed in the brown plumage colour birds at 20th week of age followed by black and black with yellow tinge-coloured birds. Total number of egg produced, external qualities like egg weight, egg length, egg width and shape index were studied. The total number of eggs produced in brown, black & black with yellow tinge were 468, 411 and 392 eggs, respectively. The study showed that brown coloured birds laid more eggs with significantly higher egg weight than other two coloured birds. Differences in egg length and egg width were statistically significant (P<0.05) in three different plumage birds. The highest shape index was observed in black yellow tinge and was statistically different from the other two plumage colours.