bluuebunny/crossref_metadata_2025_split huggingface dataset:
ODIN: Identifying Protoclusters and Cosmic Filaments Traced by Lyα-emitting Galaxies
Authors: Ramakrishnan Vandana , Lee Kyoung-Soo , Artale Maria Celeste , Gawiser Eric , Yang Yujin , Park Changbom , Chiang Yi-Kuan , Ciardullo Robin , Dey Arjun , Gronwall Caryl , Guaita Lucia , Hwang Ho Seong , Im Sang Hyeok , Jeong Woong-Seob , Kim Seongjae , Kumar Ankit , Lee Jaehyun , Lee Seong-Kook , Moon Byeongha , Padilla Nelson , Pope Alexandra , Popescu Roxana , Singh Akriti , Song Hyunmi , Troncoso Paulina , Valdes Francisco , Zabludoff Ann 
Published: December 2024

Abstract
To understand the formation and evolution of massive cosmic structures, studying them at high redshift, in the epoch when they formed the majority of their mass, is essential. The One-hundred-deg2 DECam Imaging in Narrowbands (ODIN) survey is undertaking the widest-area narrowband program to date, to use Lyα-emitting galaxies (LAEs) to trace the large-scale structure (LSS) of the Universe on the scale of 10–100 cMpc at three cosmic epochs. In this work, we present results at z = 3.1 based on early ODIN data in the COSMOS field. We identify protoclusters and cosmic filaments using multiple methods and discuss their strengths and weaknesses. We then compare our observations against the IllustrisTNG suite of cosmological hydrodynamical simulations. The two are in excellent agreement, identifying a similar number and angular size of structures above a specified density threshold. We successfully recover the simulated protoclusters with log(M

z=0/M
⊙) ≳ 14.4 in ∼60% of the cases. With these objects, we show that the descendant masses of our observed protoclusters can be estimated purely based on our 2D measurements, finding a median z = 0 mass of ∼1014.5
M
⊙. The lack of information on the radial extent of each protocluster introduces a ∼0.4 dex uncertainty in its descendant mass. Finally, we show that the recovery of the cosmic web in the vicinity of protoclusters is both efficient and accurate. The similarity of our observations and the simulations implies that our structure selection is likewise robust and efficient, demonstrating that LAEs are reliable tracers of the LSS.
Exploring Pulsar Timing Precision: A Comparative Study of Polarization Calibration Methods for NANOGrav Data from the Green Bank Telescope
Authors: Dey Lankeswar , McLaughlin Maura A. , Wahl Haley M. , Demorest Paul B. , Arzoumanian Zaven , Blumer Harsha , Brook Paul R. , Burke-Spolaor Sarah , Cromartie H. Thankful , DeCesar Megan E. , Dolch Timothy , Ellis Justin A. , Ferdman Robert D. , Ferrara Elizabeth C. , Fiore William , Fonseca Emmanuel , Garver-Daniels Nate , Gentile Peter A. , Glaser Joseph , Good Deborah C. , Jennings Ross J. , Jones Megan L. , Lam Michael T. , Lorimer Duncan R. , Luo Jing , Lynch Ryan S. , Ng Cherry , Nice David J. , Pennucci Timothy T. , Pol Nihan S. , Ransom Scott M. , Spiewak Renée , Stairs Ingrid H. , Stovall Kevin , Swiggum Joseph K. 
Published: December 2024

Abstract
Pulsar timing array experiments have recently uncovered evidence for a nanohertz gravitational wave background by precisely timing an ensemble of millisecond pulsars. The next significant milestones for these experiments include characterizing the detected background with greater precision, identifying its source(s), and detecting continuous gravitational waves from individual supermassive black hole binaries. To achieve these objectives, generating accurate and precise times of arrival of pulses from pulsar observations is crucial. Incorrect polarization calibration of the observed pulsar profiles may introduce errors in the measured times of arrival. Further, previous studies have demonstrated that robust polarization calibration of pulsar profiles can reduce noise in the pulsar timing data and improve timing solutions. In this paper, we investigate and compare the impact of different polarization calibration methods on pulsar timing precision using three distinct calibration techniques: the Ideal Feed Assumption (IFA), Measurement Equation Modeling (MEM), and Measurement Equation Template Matching (METM). Three NANOGrav pulsars—PSRs J1643−1224, J1744−1134, and J1909−3744—observed with the 800 MHz and 1.5 GHz receivers at the Green Bank Telescope (GBT) are utilized for our analysis. Our findings reveal that all three calibration methods enhance timing precision compared to scenarios where no polarization calibration is performed. Additionally, among the three calibration methods, the IFA approach generally provides the best results for timing analysis of pulsars observed with the GBT receiver system. We attribute the comparatively poorer performance of the MEM and METM methods to potential instabilities in the reference noise diode coupled to the receiver and temporal variations in the profile of the reference pulsar, respectively.
A Census of Dwarf Galaxy Satellites around LMC-mass Galaxy NGC 2403*
Authors: Carlin Jeffrey L. , Sand David J. , Mutlu-Pakdil Burçin , Crnojević Denija , Doliva-Dolinsky Amandine , Garling Christopher T. , Peter Annika H. G. , Brodie Jean P. , Forbes Duncan A. , Hargis Jonathan R. , Romanowsky Aaron J. , Spekkens Kristine , Strader Jay , Willman Beth 
Published: December 2024

Abstract
We present the first comprehensive census of the satellite population around a Large Magellanic Cloud stellar-mass galaxy, as part of the Magellanic Analog Dwarf Companions and Stellar Halos (MADCASH) survey. We have surveyed NGC 2403 (D = 3.0 Mpc) with the Subaru/Hyper Suprime-Cam imager out to a projected radius of 90 kpc (with partial coverage extending out to ∼110 kpc, or ∼80% of the virial radius of NGC 2403), resolving stars in the uppermost ∼2.5 mag of its red giant branch. By looking for stellar overdensities in the red giant branch spatial density map, we identify 149 satellite candidates, of which only the previously discovered MADCASH J074238+65201-dw is a bona fide dwarf, together with the more massive and disrupting satellite DDO 44. We carefully assess the completeness of our search via injection of artificial dwarf galaxies into the images, finding that we are reliably sensitive to candidates down to M

V
∼ −7.5 mag (and somewhat sensitive to even fainter satellites). A comparison of the satellite luminosity function of NGC 2403 down to this magnitude limit to theoretical expectations shows overall good agreement. This is the first of a full sample of 11 Magellanic Cloud–mass host galaxies we will analyze, creating a statistical sample that will provide the first quantitative constraints on hierarchical models of galaxy formation around low-mass hosts.
Insights into the Long-term Flaring Events of Blazar PKS 0805-07: A Multiwavelength Analysis Over the Period of 2009–2023
Authors: Akbar Sikandar , Shah Zahir , Misra Ranjeev , Iqbal Naseer 
Published: December 2024

Abstract
We conducted a comprehensive temporal and spectral study of the FSRQ PKS 0805-07 by using broadband observations from the Fermi-LAT and Swift-XRT/UVOT instruments over the period of MJD 54684-60264. The 3 day binned γ-ray light curve during the active state revealed 11 distinct peak structures with the maximum integral flux (E > 100 MeV) reached (1.56 ± 0.16) × 10−6 photons cm−2 s−1 on MJD 59904.5. The shortest observed γ-ray variability was 2.80 ± 0.77 days. A correlation analysis between the γ-ray spectral index and flux indicated the typical trend of hardening when the source is brighter, commonly observed in blazars. We identified a lag of 121 (+27.21, −3.51) days in the spectral index relative to the flux, within the time interval MJD 59582 to 60112. The Anderson–Darling test and histogram fit rejected the normality of the γ-ray flux distribution and instead suggested a log-normal distribution. To gain insight into the underlying physical processes, we extracted broadband spectra from different time periods in the light curve. The spectral energy distribution during various flux states was well-reproduced using synchrotron, synchrotron-self-Compton, and external-Compton emissions from a broken power-law electron distribution. The seed photons required for the external Compton process are from the IR region. A comparison of the best-fit physical parameters indicated that the variations in different flux states were primarily associated with an increase in the bulk Lorentz factor and magnetic field from low to high flux states.
Exploring Unobscured Quasi-stellar Objects in the Southern Hemisphere with KS4
Authors: Kim Yongjung , Kim Minjin , Im Myungshin , Chang Seo-Won , Jeong Mankeun , Byun Woowon , Kim Joonho , Kim Dohyeong , Shim Hyunjin , Song Hyunmi 
Published: December 2024

Abstract
We present a catalog of unobscured quasi-stellar object (QSO) candidates in the Southern Hemisphere from the early interim data of the KMTNet Synoptic Survey of Southern Sky (KS4). The KS4 data covers ∼2500 deg2 sky area, reaching 5σ detection limits of ∼22.1–22.7 AB mag in the BVRI bands. Combining this with available infrared photometric data from the surveys covering the southern sky, we select the unobscured QSO candidates based on their colors and spectral energy distribution fitting results. The final catalog contains 72,964 unobscured QSO candidates, of which only 0.4% are previously identified as QSOs based on spectroscopic observations. Our selection method achieves an 87% recovery rate for spectroscopically confirmed bright QSOs at z < 2 within the KS4 survey area. In addition, the number count of our candidates is comparable to that of spectroscopically confirmed QSOs from the Sloan Digital Sky Survey in the northern sky. These demonstrate that our approach is effective in searching for unobscured QSOs in the southern sky. Future spectrophotometric surveys covering the southern sky will enable us to discern their true nature and enhance our understanding of QSO populations in the Southern Hemisphere.
The Small Sizes and High Implied Densities of “Little Red Dots” with Balmer Breaks Could Explain Their Broad Emission Lines without an Active Galactic Nucleus
Authors: Baggen Josephine F. W. , van Dokkum Pieter , Brammer Gabriel , de Graaff Anna , Franx Marijn , Greene Jenny , Labbé Ivo , Leja Joel , Maseda Michael V. , Nelson Erica J. , Rix Hans-Walter , Wang 王 Bingjie 冰洁 , Weibel Andrea 
Published: December 2024

Abstract
Early JWST studies found an apparent population of massive, compact galaxies at redshifts z ≳ 7. Recently three of these galaxies were shown to have prominent Balmer breaks, demonstrating that their light at λ
rest ∼ 3500 Å is dominated by a stellar population that is relatively old (∼200 Myr). All three also have broad Hβ emission with σ > 1000 km s−1, a common feature of such “little red dots.” From Sérsic profile fits to the Near Infrared Camera images in F200W we find that the stellar light of galaxies is extremely compact: the galaxies have half-light radii of r
e ∼ 100 pc, in the regime of ultracompact dwarfs in the nearby Universe. Their masses are uncertain, as they depend on the contribution of possible light from an active galactic nucleus (AGN) to the flux at λ
rest > 5000 Å. If the AGN contribution is low beyond the Balmer break region, the masses are M
* ∼ 1010–1011
M
☉, and the central densities are higher than those of any other known galaxy population by 1 order of magnitude. Interestingly, the implied velocity dispersions of ∼1500 km s−1 are in very good agreement with the measured Hβ line widths. We suggest that some of the broad lines in “little red dots” are not due to AGNs, but simply reflect the kinematics of the galaxies, and speculate that the galaxies are observed in a short-lived phase where the central densities are much higher than at later times. We stress, however, that the canonical interpretation of AGNs causing the broad Hβ lines also remains viable.
Artistas de la Sevilla quinientista: valoración, presencia y ausencia en los escritos de Francisco Pacheco
Authors: Escuredo Elena 
Published: December 2024

La lectura detenida del Arte de la Pintura pone de manifiesto el valor que Francisco Pacheco dio a muchos artistas que le precedieron y dejaron su obra en la ciudad de Sevilla durante el siglo XVI. Ello, unido a los elogios que hizo de Pedro de Campaña, Luis de Vargas, Pablo de Céspedes o Pedro de Mesa en su Libro de verdaderos retratos, permite entender qué pintores fueron referenciales para él, cuáles suscitaron opiniones negativas y quienes cayeron en el olvido de sus escritos. A través de estas líneas se intentará desgranar los motivos que le llevaron a señalar la valía de algunos artistas y a justificar la denostación por otros, como Pedro Villegas Marmolejo o Juan de Roelas.
Maternal attachment levels of advanced age mothers and relation factors
Authors: Toker Eylem , Sonmez Mehtap Omac , Ozyesıldag Cemile , Akbulut Gamze 
Published: December 2024

Being mother at advanced age is associated with physical, emotional and social problems during pregnancy. The purpose of study to finding out the maternal attachment of pregnant women of advanced age and the associated factors. The methodology used was a descriptive and cross-sectional research. The minimum sample size was calculated as 323 in a confidence interval of 95%, with a margin of error of 5%. Total 278 pregnant women were included in this study. Data were collected through Personel Information Form and the Maternal Attachment Inventory. Non-parametric tests (Kruskal-Wallis,Mann-Whitney U), logistic regression analysis was performed for evaluating statistically significant data. The mean of Maternal Attachment Inventory scores is 97.22 ± 17.38 points. The maternal attachment level was higher in cases in which the mother did not work (O.R:0.944), the epidural anesthesia was used (O.R:2.937), the mother had low number of stillbirths (O.R:0.868), the mother gave birth to male infant (O.R:1.022), the newborn had high birth weight (O.R:1.038), the newborn had congenital anomaly (O.R: 0.795) and the mother had no skin-to-skin contact (O.R:0.933). we conclude that though it was discerned that mothers of advanced age had high levels of MA, it was identified that the MA level was affected by certain demographic variables.
Profile and telehealth usability of patients attending a telepsychiatry unit in south India during pandemic: a prospective observational study
Authors: Veeraraghavan Vishnupriya , Srinivasan Krishnan 
Published: December 2024

Telepsychiatry, which refers to the delivery of mentalhealth services throughvideo-based conferencing, has immense potential to resolve the mental health disparities. Era of telepsychiatry came into full force during the COVID -19 pandemic in the year 2020 in India. The literature on profile of patients attending a telepsychiatry unit is limited as the official guidelines for Telemedicine was released by the government of India in March 2020. This article provides a state-of-art analysis on the profile, telehealth usability, diagnosis, drug treatments of patients attending a telepsychiatry unit in a Union Territory in south India. 1. To profile the telepsychiatry usability by using standard questionnaire. 2. To compare the telepsychiatry usage between 2020 and 2021 (during lockdown 1 & lockdown 2). A retrospective analysis of the profile of patients attending a telepsychiatry unit in south India during the consecutive years of 2020 and 2021 was made. Demographic data regarding the age, sex, marital status, occupation, location, number of online consultations made were collected. Diagnosis was made in accordance with the International Classification of diseases tenth edition. Various groups of drugs used like antidepressants, antipsychotics, mood stabilisers, benzodiazepines. Comparison of data between the two years was made. In the year 2020, 147 teleconsultations were made and in the year 2021 46 consultations were done. Among the study participants, 62% were female. In the year 2020, psychosis was found to be the reported more(34%) and in 2021, adjustment disorder was higher (35%). Among the medications, antidepressants (35%) were the commonly prescribed group followed by antipsychotics(13%). Telepsychiatry is a budding phenomenon in India and this study is the first of its kind to throw light on the profile, drug treatment of patients attending a telepsychiatry set up.
Inclusive education pandemic: Learning barriers for children with disabilities in South Africa
Authors: Chirowamhangu Raymond 
Published: December 2024

Background: Children with disabilities encounter obstacles attaining basic education. Significantly, previous studies on South Africa have shown that up to 70% of the children with disabilities are out of school. Despite efforts to support inclusive education through White Paper 6 policy, the deployment of resources and transformation of the education sector has been a slower process.Objectives: The main objective of the article is to explore the challenges of basic education faced by children with disabilities in South Africa.Method: The study was conducted during the COVID-19 pandemic using a qualitative research methodology. The data were collected using key informant interviews through online media platforms. The data analysis was conducted using computer-aided software in the form of ATLAS.ti 8.Results: This study established several challenges faced by special needs schools, especially in the rural areas. These include a limited number of special needs schools, scholar transport, enrolment, lack of psychosocial and expert support, sanitation and infrastructure and the impact of COVID-19 pandemic on children with disabilities.Conclusion: The article concludes that even though White Paper 6 focusses on Special Needs Education in South Africa, there remains poor policy implementation to ensure inclusivity for learners with disabilities.Contribution: The research provides an understanding of the challenges faced by children with disabilities to assist policy makers with recommendations and areas of concern to improve policy implementation of the White Paper 6 in South Africa.
Biblical discourses and compulsory monogamy among the Vatsonga people in South Africa
Authors: Shingange Themba 
Published: December 2024

The 19th-century missionary-biblical discourses that marked the missionary-colonial project promulgated under the guise of Christianisation and civilisation of the heathens in Africa rendered the recipients as slaves. In Africa, the perpetual legacy of this project still manifests among others by the continued demonisation of African cultural practices. Among the vast South African conventional practices that were frowned upon by the missionaries and continue to be demonised through biblical rhetoric is polygamy. This article investigated how the 19th-century missionaries’ biblical discourses promulgated compulsory monogamy among the Vatsonga people in South Africa. It further looked at how the narrative continues to be spread by Christians using biblical discourses in contemporary South Africa. The article argued that this narrative is tantamount to what Wa Thiong’o calls a ‘cultural bomb’, which uses biblical discourses to eradicate African cultural practices. It further contended that the hegemonic superiority complex of Western epistemologies and cultural practices needs to be problematised. Thus, the article used the desktop research methodology to collect and analyse data. The findings revealed that 19th-century biblical discourses are still used as a colonial tool to disregard the Vatsonga cultural marital practices.Contribution: This article aims to contribute to the body of knowledge and discourses that address the legacies of colonialism around the coming of missionaries in Africa. Therefore, this task was sought to be completed by the decolonial call to change the narrative.
Educators’ perspective on parental involvement in homework at a rural primary school in Palala
Authors: Seleka Hlongolane A. , Masoabi Charles S. 
Published: December 2024

Background: Educators have a very important job of moulding learners’ lives. However, they cannot do it alone, they need assistance from parents. Every child is different and learns differently and most of the information a child receives comes from their parents.Aim: The article seeks to find ways to help educators to work closely with parents to support their children in their academics for better achievement. This study forms part of a master’s project; however, this article focuses on educators’ perceptions of parental involvement towards learners’ academic work at a rural primary school.Setting: The research was conducted at a rural primary school in the Palala circuit located in Limpopo.Methods: This study was approached by means of a phenomenological research design. Phenomenology seeks to comprehend the phenomena from those who live in the setting under study. The article used questionnaires to collect the data, and convenient sampling was employed. For this research we interviewed Grade 6 and 7 educators.Results: It was found that most educators are concerned with the lack of parental involvement in learners’ academic work.Conclusion: The article recommends that illiterate parents be brought closer to the teachers and be assisted on how they could be actively involved in their children’s schoolwork. The school staff, including educators, need to be workshopped on how to address parents equally and with respect, to feel welcome.Contribution: This article therefore seeks to promote awareness and devise ways to enhance rural parental involvement in children’s schoolwork and school life.
A Case Series: Refractive Outcome of Implantable Phakic Copolymer Lens with Central Hole among Adults with High Myopia and Compound Myopic Astigmatism
Authors: Ganguly Santanu , Chakraborty S. 
Published: December 2024

ABSTRACT

Purpose:
To assess the effectiveness and safety profile of implantable phakic copolymer lenses (IPCLs) with central and peripheral optic holes in adults with moderate-to-high myopia and myopia with astigmatism.

Materials and Methods:
Twelve eyes of seven adults who underwent IPCL implantation were followed up for 6 months after surgery, and data were analyzed. Preoperative parameters, such as subjective refraction, anterior chamber depth, and white-to-white diameter, were measured. A custom-made IPCL was then implanted in the posterior chamber through verion-guided temporal incision to correct moderate-to-high myopia/myopia with astigmatism.

Results:
Clinical outcome data were analyzed. The mean age was 24.08 years (standard deviation [SD] 1.72 years), and 75% of the patients were female. The mean preoperative best-corrected visual acuity was 0.3 logMAR unit (SD: 0.154 range 0.176–0.447, median 0.176). The post-IPCL implantation mean uncorrected visual acuity was 0.329 logMAR units (SD: 0.456 range 0.176–1.77, median 0.176); complications were seen in 2 (16.6%) cases. Spectacle independence was achieved in 91.3% of cases.

Conclusion:
Implantation of the IPCL with central and peripheral holes in the intraocular posterior chamber resulted in a clinically significant improvement in unaided visual acuity and quality of vision among the most in the study group, which makes it a suitable surgery for such cases though serious complications like retinal detachment also should be kept in mind.
Primary pleural serous carcinoma of mullerian origin—Report of a rare case
Authors: Modi Shilpi , Goel Deepa 
Published: December 2024

ABSTRACT
Mullerian tumor arising from pleura is a rare occurrence and under-reported in medical literature. We hereby present such a case in a 47 years old female who presented with pleural effusion. Pleural biopsy revealed a papillary tumor with mild-to-moderate nuclear atypia. Immunohistochemistry profile with positivity for WT1, Pax8, ER, and PR together with negative mesothelial markers and ruling out primary in female genitalia led us to a diagnosis of primary pleural serous carcinoma of mullerian origin. The patient received paclitaxel and carboplatin chemotherapy and is disease-free till now after 2 years of follow-up.