bluuebunny/crossref_metadata_2025_split huggingface dataset:
Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204
Authors: Anthony-Twarog Barbara J. , Deliyannis Constantine P. , Steinhauer Aaron , Sun Qinghui , Twarog Bruce A. 
Published: August 2024

Abstract
We have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29 ± 0.07, and [Ni/Fe] = −0.12 ± 0.10, where quoted errors are standard deviations. With E(B − V) = 0.07 and (m − M)0 = 13.12, appropriate isochrones provide an excellent match from the main sequence through the tip of the giant branch for an age of 1.85 ± 0.05 Gyr. Li spectrum synthesis produces A(Li) below 1.4 at the base of the red giant branch to a detectable value of −0.4 at the tip. Six probable asymptotic giant branch stars and all but one red clump star have only Li upper limits. A rapidly rotating red giant is identified as a possible Li-rich giant, assuming it is a red clump star. Main-sequence turnoff stars have a well-defined A(Li) = 2.83 ± 0.03 (sem) down to the Li-dip wall at the predicted mass of 1.29 M
☉. Despite having the same isochronal age as the more metal-rich NGC 2506, the luminosity distribution of red giants reflects a younger morphology similar to NGC 7789, possibly indicating a deeper impact of metallicity on stellar structure and A(Li) than previously assumed. As in NGC 2506 and NGC 7789, the NGC 2204 turnoff exhibits a broad range of rotation speeds, making abundance estimation impossible for some stars. The place of the cluster within Galactic A(Li) evolution is discussed.
FEAST: Feedback in Emerging extragAlactic Star ClusTers: JWST Spots Polycyclic Aromatic Hydrocarbon Destruction in NGC 628 during the Emerging Phase of Star Formation
Authors: Pedrini Alex , Adamo Angela , Calzetti Daniela , Bik Arjan , Gregg Benjamin , Linden Sean T. , Bajaj Varun , Ryon Jenna E. , Ali Ahmad A. , Bortolini Giacomo , Correnti Matteo , Elmegreen Bruce G. , Elmegreen Debra Meloy , Gallagher John S. , Grasha Kathryn , Gutermuth Robert A. , Johnson Kelsey E. , Melinder Jens , Messa Matteo , Östlin Göran , Sabbi Elena , Smith Linda J. , Tosi Monica , Faustino Vieira Helena 
Published: August 2024

Abstract
We investigate the emergence phase of young star clusters in the nearby spiral galaxy NGC 628. We use JWST NIRCam and MIRI observations to create spatially resolved maps of the Paα 1.87 μm and Brα 4.05 μm hydrogen recombination lines, as well as 3.3 and 7.7 μm emission from polycyclic aromatic hydrocarbons (PAHs). We extract 953 compact H ii regions and analyze the PAH emission and morphology at ∼10 pc scales in the associated photodissociation regions. While H ii regions remain compact, radial profiles help us to define three PAH morphological classes: compact (∼42%), extended (∼34%), and open (∼24%). The majority of compact and extended PAH morphologies are associated with very young star clusters (<5 Myr), while open PAH morphologies are mainly associated with star clusters older than 3 Myr. We observe a general decrease in the 3.3 and 7.7 μm PAH band emission as a function of cluster age, while their ratio remains constant with age out to 10 Myr and morphological class. The recovered PAH3.3μm/PAH7.7μm ratio is lower than values reported in the literature for reference models that consider neutral and ionized PAH populations and analyses conducted at galactic physical scales. The 3.3 and 7.7 μm bands are typically associated with neutral and ionized PAHs, respectively. While we expected neutral PAHs to be suppressed in proximity to an ionizing source, the constant PAH3.3μm/PAH7.7μm ratio would indicate that both families of molecules disrupt at similar rates in proximity to H ii regions.
Simultaneous Spectropolarimetric Observations in the Hα and Ca ii 8662 Å Lines of an Active Region
Authors: Mathur Harsh , Nagaraju K. , Yadav Rahul , Joshi Jayant 
Published: August 2024

Abstract
We present spectropolarimetric observations of an active region recorded simultaneously in the Hα and the Ca ii 8662 Å lines. The sunspot exhibits multiple structures, including a light bridge and a region where the Ca ii 8662 Å line core is in emission. Correspondingly, the Hα line core image displays brightening in the emission region, with the spectral profiles showing elevated line cores. The stratification of the line-of-sight magnetic field is inferred through nonlocal thermodynamic equilibrium multiline inversions of the Ca ii 8662 Å line and the weak field approximation (WFA) over the Hα line. The field strength inferred from the Hα line core is consistently smaller than that inferred from inversions at

log

τ

500

= −4.5. However, the study finds no correlation between the WFA over the core of the Hα line and that inferred from inversions at

log

τ

500

= −4.5. In regions exhibiting emission features, the morphology of the magnetic field at

log

τ

500

= −4.5 resembles that at

log

τ

500

= −1, with slightly higher or comparable field strengths. The magnetic field morphology inferred from the core of the Hα line is also similar to that inferred from the full spectral range of the Hα line in the emission region. The field strength inferred in the light bridge at

log

τ

500

= −1 is smaller than the surrounding umbral regions and comparable at

log

τ

500

= −4.5. Similarly, the field strength inferred in the light bridge from the WFA over the Hα line appears lower compared to the surrounding umbral regions.
Searching for Rapid Pulsations in Solar Flare X-Ray Data
Authors: Inglis Andrew R. , Hayes Laura A. 
Published: August 2024

Abstract
Most studies of quasiperiodic pulsations (QPPs) in solar flares have identified characteristic periods in the 5–300 s range. Due to observational limitations, there have been few attempts to probe the <5 s period regime and understand the prevalence of such short-period QPPs. However, the Fermi Gamma-ray Burst Monitor (GBM) has observed approximately 1500 solar flares to date in high-cadence 16 Hz burst mode, providing us with an opportunity to study short-period QPPs at X-ray energies. We systematically analyze every solar flare observed by Fermi/GBM in burst mode, estimating the prevalence of QPPs in multiple X-ray energy bands. To better understand these results, we complement this with an analysis of synthetic solar flare lightcurves, both with and without oscillatory signals present. Using these synthetic lightcurves, we can understand the likely false-alarm and true-positive rates in the real solar GBM data. We do not find strong evidence for widespread short-period QPPs, indicating either a low base occurrence rate of such signatures or that their typical signal-to-noise ratios must be low—less than 1—in Fermi/GBM data. Finally, we present a selection of the most interesting potential QPP events that were identified in the GBM solar X-ray data.
Exploring the Archives: A Search for Novae in UVIT Snapshots of M31
Authors: Basu Judhajeet , S. Krishnendu , Barway Sudhanshu , Chamoli Shatakshi , Anupama G. C. 
Published: August 2024

Abstract
Extensive multiwavelength studies of novae have been carried out in our galaxy and in M31 for decades. However, UV studies of extragalactic novae are limited, especially those in quiescence. For the first time, we present a UV catalog of novae in M31 using the archival AstroSat Ultraviolet Imaging Telescope (UVIT) imaging data. We used two image subtraction techniques to retrieve objects located deep into the M31 central region. We have found 42 novae in total in the UVIT images, 15 of which have been detected in multiple filters in the far-ultraviolet (FUV) and near-ultraviolet. The novae detected at quiescence show signatures of accretion disk from their UV spectral energy distributions, whereas those in the outburst phase show signatures of a pseudo-photosphere. A few novae were also detected in multiple epochs. Some show a near-constant FUV magnitude at quiescence, while others caught near the outburst reveal pre-eruption dips in their light curves. We conclude with a discussion on the significance of UV surveys in illuminating theoretical predictions for novae systems, including detecting the elusive early UV flash.
A Robust Young Stellar Object Identification Method Based on Deep Learning
Authors: Tan 谈 Lei 磊 , Liu 柳 Zhicun 志存 , Wang 王 Xiaolong 小龙 , Mei 梅 Ying 盈 , Wang 王 Feng 锋 , Deng 邓 Hui 辉 , Liu 刘 Chao 超 
Published: August 2024

Abstract
Young stellar objects (YSOs) represent the earliest stage in the process of star formation, offering insights that contribute to the development of models elucidating star formation and evolution. Recent advancements in deep-learning techniques have enabled significant strides in identifying special objects within vast data sets. In this paper, we present a YSO identification method based on deep-learning principles and spectra from the LAMOST. We designed a structure based on a long short-term memory network and a convolutional neural network and trained different models in two steps to identify YSO candidates. Initially, we trained a model to detect stellar spectra featuring the Hα emission line, achieving an accuracy of 98.67%. Leveraging this model, we classified 10,495,781 stellar spectra from LAMOST, yielding 76,867 candidates displaying a Hα emission line. Subsequently, we developed a YSO identification model, which achieved a recall rate of 95.81% for YSOs. Utilizing this model, we further identified 35,021 YSO candidates from the Hα emission-line candidates. Following cross validation, 3204 samples were identified as previously reported YSO candidates. We eliminated samples with low signal-to-noise ratios and M dwarfs by using the equivalent widths of the N ii and He i emission lines and visual inspection, resulting in a catalog of 20,530 YSO candidates. To facilitate future research endeavors, we provide the obtained catalogs of Hα emission-line star candidates and YSO candidates along with the code used for training the model.
Water Generation on the Moon from Solar Wind and Meteoroid Impacts
Authors: Jones Brant M. , Carrillo-Sánchez Juan Diego , Janches Diego , Sarantos Menelaos , Orlando Thomas M. 
Published: August 2024

Abstract
The kinetics of water formation on the lunar surface from impact-driven melts (IM) of meteoroids and recombinative desorption (RD) of solar-wind-implanted regolith grains is assessed. The ratio of water generated from RD:IM is ultimately controlled by the diffusion constant of the implanted defects. Higher diffusion activation energies of hydroxyls (-OH) result in more trapping of the implanted defects and, consequently, higher water production from IM versus RD. At diffusion activation energies >1 eV, water production from RD is negligible and IM is the dominant channel. Our results suggest that RD can be associated with the observed latitude and diurnal dependence but RD and/or micrometeorite IM are not major contributors to the water ice observed within the permanently shadowed regions (PSRs). This suggests that volcanic and/or delivery via large impactors are the more likely major sources of water on the Moon. However, our model generally agrees with the observed latitudinal dependence of the inferred OH/H2O and the overall diurnal trend from orbital observations in the infrared. In addition, our results also suggest that micrometeorites are responsible for the high content of molecular water in the glass of regolith grains.
A Pain Physician’s Perspective on Recent Advances in Painful Diabetic Peripheral Neuropathy Management
Authors: Kanthed Pravesh , Barasker Swapnil Kumar , Ravikumar C.M. 
Published: August 2024

Abstract
Diabetic peripheral neuropathy (DPN) is a prevalent neurological complication linked to diabetes mellitus, exerting a substantial impact on the quality of life for those affected. This review article aims to discuss and review advances in the pain management of patients with DPN. We reviewed recent DPN management literature primarily from PubMed and SCOPUS using specific keywords, focusing on original research and recent advancements. The pathophysiology of DPN involves metabolic and vascular changes in nerve fibers, leading to direct damage and a decrease in their natural repair capacity. Effective glycemic control plays a central role in managing DPN, along with addressing other contributing factors such as comorbidities and lifestyle modifications. Nutraceuticals, including alpha-lipoic acid and Vitamin B12, have shown promising results in some studies. Antineuropathic agents such as calcium channel a2-δ ligands, serotonin and noradrenaline reuptake inhibitors, tricyclic antidepressants, and sodium channel blockers are commonly used in DPN pain management. Topical therapies, including capsaicin and lidocaine patches, have also demonstrated efficacy. Opioids are generally discouraged due to weak evidence and long-term deleterious side effects, along with the risk of addictive potential. Neuromodulation has emerged as a modality in resistant cases not responding to pharmacological management. Individualized treatment plans based on symptomatology, comorbidities, and side effect profiles should be developed for DPN patients. Comprehensive management of DPN involves a multidisciplinary approach, emphasizing patient education, regular assessment, and counseling to prevent further damage and complications.
The Superficial Cervical Plexus Block with the Auriculotemporal Nerve Block for Breaking the Refractory Pain Cycle of Malignant Otitis Externa and Skull Base Meningitis
Authors: Ladhad Dharmesh Arvind , Mitragotri Milon Vasant 
Published: August 2024

Abstract
Pain can be a severe and distressing symptom in conditions such as malignant otitis externa (MOE) with the associated skull base meningitis and even more following the debridement surgeries done for the same. It can be refractory to conventional therapies, including weak opioids, nonsteroidal anti-inflammatory drugs, and antineuropathic medications. Breaking this cycle of pain is very important in such cases to achieve good pain control and treat the psychological distress of the patient. Since there is a lack of literature for achieving satisfactory pain control in such cases, we successfully adopted a novel approach to break the pain cycle by employing the superficial cervical plexus block and auriculotemporal nerve (ATN) nerve block as the area of pain was in the distribution of these two nerves.
Computed Tomography-Guided Facet Synovial Cyst Aspiration
Authors: Bangar Kashinath S , Page Nivedita Dilip , Bangar Gayatri , Kurhade Varsha 
Published: August 2024

Abstract
Lumbar facet joint cysts are the benign collections of fluid at or around the facet joints, which may lead to pain and radicular symptoms. They may be associated with spinal stenosis, nerve root compression, neurogenic claudication, and many other neurological disturbances, as they can encroach on the adjacent neural foramen. Although the recommended treatment is surgical excision, percutaneous interventions provide an effective, acceptable, and safe alternative that may be considered. Hereby, we present the case of a 78-year-old patient known diabetic, hypertensive, and with deranged renal function, with left-sided L5 radiculopathy due to an L4-5 facet synovial cyst. He was treated through computed tomography (CT)-guided percutaneous aspiration and got long-term relief. The technique we used was different from the regular facet cyst aspiration, and the precision offered by CT guidance helped us provide optimum treatment leading to long-term relief. Thus, tailor-made treatment options rather than standard protocols for all patients allow a better risk–benefit ratio, in the field of pain management.
Role of Lumbar Sympathetic MIPSI in Linezolid-induced Peripheral Neuropathy with Motor Dysfunction
Authors: Mody Rutvi Manoj , Deshmukh Prakash Rajendra , Godbole Shreyas S. , Ranade Manjiri Neelesh , Kothari Kailash M. , Bhargude Yogita M. , Manjunath K. M. 
Published: August 2024

Abstract
Linezolid is a Class A drug of multidrug-resistant and extensively drug-resistant tuberculosis whose use carries a considerable risk of toxicity. In this study, five patients of linezolid-induced peripheral neuropathy (LIPN) showed decreased great toe power in both lower limbs (LLs). The sympathetic nervous system has been implicated in pain and motor dysfunction associated with painful peripheral neuropathy. Therapeutic interventions targeted at the sympathetic nervous system are very uncommon. We have used pain detect score (PDS) for the assessment of neuropathic pain. However, none of the criteria in the PDS questionnaire include motor response, thus in patients with sensory-motor neuropathy, we assessed great toe power, which was 4/5 in all 5 patients before lumbar sympathetic minimally invasive pain and spine intervention (MIPSI). All patients had improved pain symptoms and great toe power 5/5 immediately postprocedure, with no slipping of chappals. Here, we are providing evidence and conclude that lumbar sympathetic MIPSI is an important modality of treatment in patients with LIPN with motor dysfunction.
A Randomized Controlled Study of Epidural Morphine Sulfate-soaked Gelfoam and Morphine Sulfate Instillation in the Management of Postoperative Pain following Lumbar Spinal Fixation Surgery
Authors: Bharadwaj Abhishek , Solanki Rekha Nileshbhai , Thakkar Jayshree , Dey Samarjit 
Published: August 2024

Abstract

Background:
Lumbar spinal fixation surgeries play a pivotal role in addressing pain which can be nociceptive, neuropathic, mixed, and nociplastic; however, these surgeries can also cause significant postoperative pain and discomfort, leading to prolonged hospital stays and delayed return to normal activity.

Aims and Objectives:
The aim of the study was to provide effective postoperative analgesia and to compare the analgesic efficacy by application of Gelfoam-soaked morphine sulfate placed in the epidural space and direct instillation of morphine sulfate in the epidural space in patients undergoing lumbar spinal fixation surgery under general anesthesia.

Materials and Methods:
A total of 60 patients planned for Lumbar spinal fixation surgeries were selected and sorted into two groups of 30 each after a computer-based randomization. In Group G, a 5 cm × 1 cm piece of absorbable gelatin sponge soaked in 5 mg of morphine sulfate diluted in 0.9% normal saline up to 5 mL was placed in the epidural space. In Group I, 5 mg of morphine sulfate diluted in 0.9% normal saline 5 mL was instilled over the intact epidural space. Pulse rate, mean arterial pressure (MAP), respiratory rate (RR), and peripheral oxygen saturation (SpO2) were observed hourly for the first 6 h, then at 2 hourly intervals till 12 h, and at 4 hourly intervals till 48 h. Postoperatively, pain intensity is assessed by the Visual Analog Scale (VAS) for 24 h, and the time of the first analgesic dose is noted. VAS ranges from 0 (no pain) to 10 (severe pain). Preoperative instructions were given to the patients about the use of VAS.

Results:
In this study, Group G demonstrated lower postoperative VAS scores and delayed need for rescue analgesia compared to Group I (P < 0.05, P < 0.0001, respectively). Group I had a higher total analgesic requirement (P < 0.0001) and consistently higher heart rates (P < 0.0001) compared to Group G. MAPs were lower in Group G compared to Group I (P < 0.0001). RRs, SpO2, sedation scores, and incidence of nausea and pruritus were similar between the two groups (P > 0.05).

Conclusion:
Epidural administration of morphine using Gelfoam as a vehicle for sustained release of morphine is a safe and effective method of postoperative analgesia in lumbar spinal fixation surgeries and results in better hemodynamics, prolonged duration of analgesia, and reduced requirement of rescue analgesics, compared to epidural instillation of morphine.
The role of matrix metalloproteinase inhibitor (doxycycline) in the treatment of primary focal segmental glomerulosclerosis
Authors: Mansour Ahmed E. , El Shahawy El-Metwaly L. , Ibrahim Mohamed E. , Shahat Mohammed M. , Younis Dina A. 
Published: August 2024

Background
Focal and segmental glomerulosclerosis (FSGS) is a histological pattern used in clinical practice to define a podocytopathy that develops with nephrotic-range proteinuria and segmental obliteration or collapse of glomerular capillary loops with increased extracellular matrix in some glomeruli. The major concerns of idiopathic FSGS are the poor renal prognosis with an absence of response to immunosuppressive therapies or relapses and its recurrence after kidney transplantation in ⁓30–50% of patients, which leads to renal graft failure. The aim of this work is to study the possible role of matrix metalloproteinase inhibitor (doxycycline) in the treatment of primary FSGS.

Patients and methods
This prospective cohort study was conducted on 100 patients with FSGS. Patients were randomly divided into two equal groups: group 1: patients with FSGS under conventional therapy as a control group. Group 2: patients with FSGS under conventional therapy and doxycycline 100 mg/day for 3 months. Patients were closely monitored for treatment effects and adverse reactions. Clinical, laboratory, and radiological parameters were assessed. Treatment outcomes, including remission of proteinuria and adverse effects, were evaluated.

Results
Group 2 showed significantly lower levels of triglycerides and fasting blood glucose compared with group 1. Doxycycline-related side effects were observed in some group 2 patients. Both groups showed increased hemoglobin levels and decreased C-reactive protein levels at follow-up. Kidney function tests improved in both groups, with group 2 demonstrating superior outcomes. Group 2 showed higher rates of improvement and lower incidence of end-stage renal disease requiring hemodialysis.

Conclusion
Adding doxycycline to conventional therapy holds promise for treating primary FSGS. Patients receiving combined therapy exhibited enhanced renal function, reduced proteinuria, and better treatment outcomes.
Evaluation of renal resistive index and new biomarkers in post-hepatitis C cirrhosis patients for developing kidney injury
Authors: Tony Effat A.E. , Abozaid Mohamed A.A. , Aziz Amal A. , Abdou Madleen Adel A. , Attia Noha M. , Othman Mostafa H. , Abass Wael A. , Mostafa Mohammad H. 
Published: August 2024

Background
In liver cirrhosis, hemodynamic changes in splanchnic and systemic circulations are involved. Indeed, no established laboratory markers for altered renal hemodynamics in cirrhosis were implicated. The duplex Doppler waveform analysis of intrarenal arteriolar vessels is considered a noninvasive estimate of renovascular impedance and renal arterial vasoconstriction. In particular, the renal resistive index (RRI) is considered as the best reliable indicator of renal blood flow in patients with different diseases. The study aimed to evaluate RRI, serum and urinary cystatin C, beta-trace protein, liver fatty acid protein, and kidney injury molecule-I as noninvasive indicators of altered renal hemodynamics in patients with cirrhosis with normal urea and creatinine.

Patients and methods
A case–control study included 60 patients with post-hepatitis C virus (HCV) cirrhosis and 40 healthy controls. Serum and urinary biomarkers were measured. Renal color Doppler duplex was used to evaluate RRI.

Results
Mean serum and urinary biomarkers in HCV patients were significantly higher than controls. Moreover, the RRI was higher in patients than in controls with P value less than 0.001. Rising levels of urea, high direct bilirubin, and hypoprothrombinemia with high serum kidney injury molecule 1 and RRI were significant independent predictors for subsequent kidney injury.

Conclusion
Urinary kidney injury molecule 1 is a reliable, sensitive, and specific biomarker for the prediction of kidney injury among HCV cirrhotic patients with an obvious superior test performance and specificity to e other biomarkers. An increase in serum kidney injury molecule 1 and RRI were associated with poor prognosis.