bluuebunny/crossref_metadata_2025_split huggingface dataset:
A multi‐frequency high‐gain GNSS array antenna for asteroid sampling return
Authors: Liu Zhijia , Lu Fan , Duan Jiangnian , Huang Yuhan , Sun Dayuan , Sun Yinlong 
Published: October 2022

AbstractAn almost all‐metal L band multi‐frequency high‐gain GNSS array antenna for an asteroid sampling return mission has been developed for orbit determination. The proposed antenna is designed for reception and is compatible with Beidou and GPS at L‐band (i.e. GPS‐L1: 1575.42 MHz; BDS‐B1I: 1561.098 MHz; BDS‐B2a: 1176.45 MHz). The radiation element is an almost all‐metal dipole with structure improvement, and thereby strong enough to handle vibrations and loads. The array antenna is composed of the 7‐radiation element and a low loss air suspended stripline beam‐forming network. The six elements around the center element have uniform distribution, while the center one is excited twice amplitude than outer ones for appropriate gain and beamwidth. A prototype of the proposed GNSS array antenna is designed in a simulation and measured in an experiment. The simulated and measured results agree very well, showing that the reflection coefficient <−17.5 dB over 32.8% bandwidth from 1.1 to 1.7 GHz is achieved with rotationally symmetric radiation patterns and gains >13.4 dBic, 15.2 dBic, 15.2 dBic at BDS‐B2a, GPS‐L1, BDS‐B1I, respectively.
Partial shading detection and hotspot prediction in photovoltaic systems based on numerical differentiation and integration of the P − V curves
Authors: Khodapanah Mohammadali , Ghanbari Teymoor , Moshksar Ehsan , Hosseini Zahra 
Published: October 2022

AbstractHotspot phenomenon is an expected consequence of long‐term partial shading condition (PSC), which results in early degradation and permanent damage of the shaded cells in the photovoltaic (PV) systems. Hence, partial shading detection and estimation of its intensity is a significant factor to predict the possibility of hotspotting process and its occurrence time for PV system protection. In this paper, two partial shading detection indices are introduced based on the extracted power‐voltage () curves. The first characteristic is related to the real shaded PV system and the second curve is numerically obtained from the equivalent single‐diode circuit model. The proposed PSC detection indices are established according to the difference between the numerical differentiation and integration of the curves from the real PV system and the virtual reference model. These techniques have the advantages to distinguish between temporary and permanent PSC. Moreover, it is possible to estimate the intensity of the shading level and predict the hotspot occurrence time, accordingly. The performance of these methods are confirmed using some simulations and an experimental setup. The results verify the capabilities of the methods for partial shading detection without the requirement of an extra physical cell/module as a reference model.
Comparison of Endovascular Therapy for Ruptured Cerebral Aneurysm during Spasm and Nonspasm Period
Authors: Kamide Tomoya , Misaki Kouichi , Tsutsui Taishi , Nambu Iku , Yoshikawa Akifumi , Nakada Mitsutoshi 
Published: October 2022

Abstract
Objective Cerebral vasospasm complicates the treatment of aneurysmal subarachnoid hemorrhage, and the optimal timing of surgery for ruptured intracranial aneurysm diagnosed during the cerebral vasospasm period has been a matter of debate. This study aimed to clarify the differences in endovascular treatment outcomes between the timing of intervention during spasm and nonspasm.
Methods and Materials We retrospectively reviewed 68 consecutive patients with ruptured cerebral aneurysms who underwent coil embolization between January 2016 and March 2021. Clinical presentations, radiographic findings, and outcomes were retrospectively reviewed and compared between patients who were treated at the time of spasm and nonspasm. Information regarding the following clinical characteristics was collected: age, sex, World Federation of Neurosurgical Societies (WFNS) grade on admission, aneurysm morphology, treatment result, and outcome. We defined from day 4 to day 14 as the timing of spasm, and vasospasm as more than 30% narrowing of the proximal anterior cerebral artery, middle cerebral artery, and internal carotid artery segment during the second examination compared with the first. The chi-squared test or Fisher's exact test were performed to evaluate the covariates for binary categorical dependent variables as appropriate, and nonnormal variables were compared using the Mann–Whitney U test.
Results Ten patients (14.7%) underwent coil embolization at the time of vasospasm. Age, sex, WFNS grade, and aneurysm morphology were not different between the spasm and nonspasm groups. Additionally, there were no significant between-group differences in volume embolization ratio, procedure-related complications, occurrence of delayed cerebral ischemia, and outcome at discharge.
Conclusion There were no significant between-group differences in treatment results and outcomes between the spasm and nonspasm groups. Endovascular treatment at the time of vasospasm could be the optimal treatment method for ruptured cerebral aneurysms.
Preoperative Transarterial Embolization of a Large Petrotentorial Angiomatous Meningioma Using Combination of Liquid Embolic Materials: A Case Report
Authors: Iampreechakul Prasert , Yuthagovit Sarunya , Wangtanaphat Korrapakc , Hangsapruek Sunisa , Lertbutsayanukul Punjama , Thammachantha Samasuk , Siriwimonmas Somkiet 
Published: October 2022

AbstractIntracranial angiomatous meningiomas are a rare WHO grade I histological variant of meningioma whose vascular component exceeds 50% of the total tumor area. Preoperative embolization of angiomatous meningiomas has rarely been reported previously. A 58-year-old woman was referred to our institute for a large petrotentorial hypervascular tumor presented with progressively worsening right facial paralysis and hearing loss for 6 months. Cranial computed tomography scan and magnetic resonance imaging revealed a large homogenously enhancing multilobulated mass involving middle and posterior cranial fossae with marked brainstem compression. The tumor extended into a right internal auditory canal and labyrinthine structures with destructive changes of bony structures. Magnetic resonance angiography showed hypervascularity in the tumor. Preoperative transarterial embolization using liquid embolic materials was successfully performed with resulting in almost complete devascularization of the tumor. Adequate hemostasis was achieved following gross total resection of the tumor (Simpson grade II). A histopathological examination confirmed the diagnosis of an angiomatous meningioma. Preoperative transarterial embolization of angiomatous meningioma with liquid embolic material was safe and effective in reducing perioperative blood loss and facilitating total tumor resection.
Decompressive Craniectomy for the Treatment of Severe Diffuse Traumatic Brain Injury: A Randomized Controlled Trial
Authors: Hashmi Syed Muhammad Maroof , Nazir Sadaf , Colombo Francesca , Jamil Akmal , Ahmed Shahid 
Published: October 2022

Abstract
Background Severe traumatic brain injury (TBI) is one of the leading public health problems across the world. TBI is associated with high economic costs to the healthcare system specially in developing countries. Decompressive craniectomy is a procedure in which an area of the skull is removed to increase the volume of intracranial compartment. There are various techniques of decompressive craniectomy used that include subtemporal and circular decompression, and unilateral or bilateral frontotemporoparietal decompression.
Objective The aim of this study was to compare the outcome of decompressive craniectomy for the management of severe TBI versus conservative management alone at the Department of Neurosurgery, Abbasi Shaheed Hospital, Karachi, Pakistan.
Methods The study (randomized controlled trial) was conducted from February 1, 2014, till June 30, 2017.
Results A total of 136 patients were included after following the inclusion criteria. They were randomly assigned to two groups, making it 68 patients in each study group. There were 89 males and 47 females. All the patients received standard care recommended by the Brain Trauma Foundation. The mortality rate observed at 6 months in decompressive craniectomy was 22.05%, while among conservative management group, it was 45.58%. Difference in mortality of both groups at 6 months was significant. Total 61.76% (42) of patients from decompressive craniectomy group had a favorable outcome (Glasgow outcome scale: 4–5) at 6 months. While among conservative management group, total 35.29% (24) had a favorable outcome (Glasgow outcome scale: 4–5). Difference in Glasgow outcome scale at 6 months of both groups was significant.
Conclusion In conclusion, decompressive craniectomy is simple, safe, and better than conservative management alone.
Cerebral Infarction Due to Occlusion of Main Trunk of Middle Cerebral Artery in Patient with Accessory Middle Cerebral Artery
Authors: Tsuchiya Atsushi , Tsukiyama Atsushi , Matsumoto Shutaro , Uekusa Toshimasa , Abe Hiroyuki , Fukui Issei , Iida Yu , Mori Kentaro , Kawahara Yosuke , Tamase Akira , Abe Katsuya , Yamashita Ryotaro , Takeda Mutsuki , Nakano Tatsu , Nomura Motohiro 
Published: October 2022

AbstractThe existence of an accessory middle cerebral artery (AMCA) usually has no pathological significance. Three patients developed cerebral infarction due to thromboembolic occlusion of the main trunk of the middle cerebral artery (MCA). In these patients, AMCA originating from the anterior cerebral artery was intact, and ran to the lateral side along the main MCA. Emergency endovascular treatment to remove the thrombus in the main MCA was performed, and MCA was recanalized. In one patient, the main MCA re-occluded and cerebral infarction developed on the next day. The diameter of AMCA is commonly smaller than that of the main MCA. Therefore, volume of ischemic region depends on the collateral blood flow to the left MCA territory by AMCA. Once an anomalous MCA is detected in a patient with cerebral infarction involving the MCA territory, close examinations to assess the anatomy of both the main and anomalous MCA are mandatory.
A Comparative Study of Intravenous Dexmedetomidine with Local Infiltration of Ropivacaine in Attenuation of Stress Response to Skull Pin Insertion in Craniotomies
Authors: Bala Renu , Arora Vandna , Anshul Anshul , Arora Rashmi , Kamal Kirti , Malhan Srishti 
Published: October 2022

Abstract
Objective Skull pin insertion in patients undergoing craniotomies elicits hemodynamic and neuroendocrine stress response that may be deleterious to the patient. Various drugs and techniques have been documented in literature to abate this stress response. Against this background, we aimed to compare the efficacy of intravenous dexmedetomidine and local infiltration of ropivacaine for attenuation of stress response to pin insertion in craniotomies.
Methods Eighty-eight adult patients undergoing craniotomy under general anesthesia from March 2019 to April 2020 requiring application of head holder were randomized into two equal groups. After intubation, 0.75 µg kg−1 of dexmedetomidine over 10 minutes through infusion was given in group D, while local infiltration at pin sites was done with 0.5% ropivacaine, 2 mL at each site in group R. Hemodynamic parameters and levels of serum cortisol, prolactin, and blood glucose were measured before and after pin insertion. Unpaired t-test for continuous variables and Mann–Whitney U test was used for nonnormally distributed variables.
Results Heart rate was statistically similar between the two groups at all the observed time points. The difference in mean arterial pressure values between the two groups was found to be statistically significant only from 10 to 20 minutes after pin insertion being statistically similar at rest of the time points. Levels of serum glucose, cortisol, and prolactin values 30 minutes after pin insertion were statistically similar between both groups.
Conclusion We concluded that both interventions are equally efficacious in attenuation of hemodynamic and stress response to head holder application in patients undergoing craniotomies.
Outcome of Long-Segment Fixation versus Inclusion of the Fractured Level in Short-Segment Fixation for Thoracolumbar Junction Fractures
Authors: El Khateeb Eslam El Sayed , Tammam Ahmed G. , Hamdan Ali R. 
Published: October 2022

Abstract
Objective The aim of this study was to compare the radiological outcomes of long-segment fixation and short-segment fixation, including the fracture level in patients treated for thoracolumbar junction fractures.
Methods Data collected from records of patients with thoracolumbar junction fractures who were operated at our department. Neurological evaluation was done using American Spinal Injury Association classification score. Radiological parameters used were the Cobb's angle, vertebral body compression ratio, the anteroposterior spinal canal diameter, and the anterior and the posterior vertebral body heights. Patients were divided into two groups: group A included patients who underwent long-segment fixation and group B included patients who underwent short-segment fixation with inclusion of the fracture level.
Results The mean preoperative Cobb angle was 22.51 degrees in group A and 19.37 degrees in group B. Both groups showed improvement in the postoperative Cobb angle as the mean in group A was 14.17 degrees and in group B was 11.77 degrees. The mean preoperative compression ratio in group A was 82.8%, while in group B it was 76%. The postoperative mean in group A was 89.2%, while in group B, it was 84%. The mean preoperative anterior vertebral body height of the fractured vertebra in group A was 16.7 mm, while in group B, it was 15.18 mm. The mean preoperative posterior vertebral body height in group A was 16.33 mm and that of group B was 19.41 mm. The mean postoperative anterior vertebral body height in group A was 17.66 mm and that of group B was 17.10 mm. The mean postoperative posterior vertebral body height in group A was 17.11 mm and that of group B was 20.79 mm.
Conclusion Posterior short-segment fixation with additional screws at the fracture level provides similar—if not better—clinical and radiological outcomes to long-segment fixation in the treatment of thoracolumbar junction fractures.
QCD sum rule study for hidden-strange pentaquarks*
Authors: Yang Pengfei , Chen Wei 
Published: October 2022

Abstract
Inspired by the LHCb observations of hidden-charm

states, we study their hidden-strange analog

states in both the

and

configurations. We investigate

pentaquark states in the

,

,

,

, and

structures with

and

and

with

and calculate their masses in the framework of QCD sum rules. Our numerical results show that the extracted hadron masses for all the

,

,

,

, and

structures are significantly higher than the

mass threshold, and the masses for

and

are also higher than the threshold of the corresponding hadron; hence, no bound state exists in such channels, which is consistent with the current experimental status.
Strangeness S = −2 baryon-baryon interactions and femtoscopic correlation functions in covariant chiral effective field theory*
Authors: Liu Zhi-Wei , Li Kai-Wen , Geng Li-Sheng 
Published: October 2022

Abstract
We study the baryon-baryon interactions with strangeness

and corresponding momentum correlation functions in leading order covariant chiral effective field theory. The relevant low energy constants are determined by fitting to the latest HAL QCD simulations, taking into account all the coupled channels. Extrapolating the so-obtained strong interactions to the physical point and considering both quantum statistical effects and the Coulomb interaction, we calculate the

and

correlation functions with a spherical Gaussian source and compare them with recent experimental data. We find a good agreement between our predictions and the experimental measurements by using the source radius determined in proton-proton correlations, which demonstrates the consistency between theory, experiment, and lattice QCD simulations. Moreover, we predict the

,

, and

interactions and corresponding momentum correlation functions. We further investigate the influence of the source shape and size of the hadron pair on the correlation functions studied and show that the current data are not very sensitive to the source shape. Future experimental measurements of the predicted momentum correlation functions will provide a non-trivial test of not only SU(3) flavor symmetry and its breaking but also the baryon-baryon interactions derived in covariant chiral effective field theory.
Polyvinyl alcohol–potassium iodide gel probe to monitor the distribution of reactive species generation around atmospheric-pressure plasma jet
Authors: TRAN Trung Nguyen , HU Min , OGASAWARA Tomohiro , IWATA Yuki , SUZUKI Haruka , SAKAMOTO Jin , AKIYOSHI Masafumi , TOYODA Hirotaka , MATSUURA Hiroto 
Published: October 2022

Abstract
This study proposes polyvinyl alcohol–potassium iodide (PVA–KI) as a novel gel chemical probe. The probe uses the reactions among PVA, KI, water, borax, and oxidative species to visualize the distribution of reactive species. This method provides information regarding the distribution of reactive species by coloration on the gel surface. The effects of the surrounding gas phase on the distribution and diffusion of the reactive species are also investigated using the PVA–KI gel probe. Further, the relationship between the irradiation distance and reactive species diffusion is determined on the surface of the PVA–KI probe with and without plastic shielding. Adjusting the irradiation distance appropriately leads to an increase in the modified area as detected by the PVA–KI gel probe analysis. The relative concentration distributions of the reactive species are also obtained from visualized color distributions measured using a colorimeter. Furthermore, reactive species generation by long-scale line plasma is confirmed by the color reaction on the PVA–KI gel surface, with a greater area being covered by an atmospheric-pressure pulsed microwave line plasma source.
Expression of Programmed Cell Death 1 Ligand 2 in Patients With Thymoma and Thymomatous Myasthenia Gravis
Authors: Zhu Haoshuai , Zou Jianyong , Zeng Bo , Yang Lei , Xiao Jiefei , Zhang Xin , Feng Yanfen , Su Chunhua 
Published: October 2022

Abstract

Objectives
This study aimed to examine the expression of programmed cell death 1 ligand 2 (PD-L2) in thymoma and thymomatous myasthenia gravis (MG).

Methods
The records of 70 patients with thymoma receiving surgical resection between January 2017 and December 2018 were retrospectively reviewed. Thymoma PD-L2 expression was evaluated by immunohistochemistry staining. Associations between PD-L2 expression and clinicopathologic features were examined.

Results
PD-L2 expression was positive in 41 patients (58.6%) and negative in 29 patients (41.4%). Of them, 33 had thymomatous MG. Patients with MG were more likely to be 50 years of age or younger (69.70% vs 35.14%); have more World Health Organization (WHO) type B thymomas (84.85% vs 64.86%); have tumors of smaller size (4.09 ± 2.33 cm vs 6.47 ± 2.42 cm); have positive PD-L2 expression (78.79% vs 40.54%); and have a higher percentage of PD-L2–positive cells, higher PD-L2 expression intensity, and score (all P &lt; .05). Positive PD-L2 expression was associated with more type B thymomas, higher Masaoka-Koga stage, smaller tumor size, ectopic thymus, and MG (all P &lt; .05). Factors significantly associated with MG were age under 50 years, tumor size less than 5 cm, and positive PD-L2 expression (all P &lt; .05).

Conclusions
Thymoma PD-L2 expression is significantly associated with thymomatous MG and WHO histologic types B2 and B3.
Whose Voice Matters? Chronotopic Position(ing)s and the Dialogic Inclusion of Marginalized Stakeholders in Critical Applied Linguistics
Authors: Catedral Lydia , Djuraeva Madina 
Published: October 2022

Abstract
In this paper, we argue that critical applied linguists must work towards the materially transformative, dialogic inclusion of marginalized voices in order to create more just social relations. We show how a spatiotemporal theorization of voice as materially situated and discursively imaginative can enable a more holistic approach to including such voices. Illustrative data come from the experiences of migrant domestic workers in Hong Kong and includes their discourses, those of their employers, and those of domestic worker-led grassroots organizations. We use these data to demonstrate how different stakeholders have unequal abilities to materialize the spatiotemporal imaginaries they voice out, how academic (re)theorizations of language may not always bring about changes to the material spatiotemporal conditions of marginalized stakeholders, and why the collective voices of marginalized groups should be taken into account alongside individual voices. Implications are discussed in terms of action-oriented work that critical applied linguists can engage in to support the inclusion of migrant domestic workers’ voices in particular, and the voices of marginalized stakeholders in our field more generally.
MuSiC2: cell-type deconvolution for multi-condition bulk RNA-seq data
Authors: Fan Jiaxin , Lyu Yafei , Zhang Qihuang , Wang Xuran , Li Mingyao , Xiao Rui 
Published: October 2022

Abstract
Cell-type composition of intact bulk tissues can vary across samples. Deciphering cell-type composition and its changes during disease progression is an important step toward understanding disease pathogenesis. To infer cell-type composition, existing cell-type deconvolution methods for bulk RNA sequencing (RNA-seq) data often require matched single-cell RNA-seq (scRNA-seq) data, generated from samples with similar clinical conditions, as reference. However, due to the difficulty of obtaining scRNA-seq data in diseased samples, only limited scRNA-seq data in matched disease conditions are available. Using scRNA-seq reference to deconvolve bulk RNA-seq data from samples with different disease conditions may lead to a biased estimation of cell-type proportions. To overcome this limitation, we propose an iterative estimation procedure, MuSiC2, which is an extension of MuSiC, to perform deconvolution analysis of bulk RNA-seq data generated from samples with multiple clinical conditions where at least one condition is different from that of the scRNA-seq reference. Extensive benchmark evaluations indicated that MuSiC2 improved the accuracy of cell-type proportion estimates of bulk RNA-seq samples under different conditions as compared with the traditional MuSiC deconvolution. MuSiC2 was applied to two bulk RNA-seq datasets for deconvolution analysis, including one from human pancreatic islets and the other from human retina. We show that MuSiC2 improves current deconvolution methods and provides more accurate cell-type proportion estimates when the bulk and single-cell reference differ in clinical conditions. We believe the condition-specific cell-type composition estimates from MuSiC2 will facilitate the downstream analysis and help identify cellular targets of human diseases.