bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of COVID-19 on the Daily Life and Medical Practice of Otolaryngology Physicians
Authors: Elzayat Saad , Elfarargy Haitham H. , Mandour Mahmoud , Mahrous Ali , El-Deeb Mohamed E. , Barbara Maurizio , Elsherief Hossam 
Published: July 2022

Abstract
Introduction The coronavirus disease 2019 (COVID-19) has made otolaryngologists more susceptible than their counterparts to its effect.
Objective This study aimed to find if COVID-19 had a different impact on ear, nose, and throat (ENT) physicians' of various categories (residents, registrars, and consultants ) regarding many aspects of the quality of life (protection, training, financial, and psychological aspects).
Methods We included 375 ENT physicians, of different categories (residents, registrars, and consultants), from 33 general hospitals and 26 university hospitals in Egypt. The study was conducted using a 20-item questionnaire with a response scale consisting of three categories: yes, no, and not sure. It covered infection control and personal protective equipment (PPE) usage; medical practice and safety; online consultation and telemedicine,; webinars and online lectures; COVID-19 psychological, financial, and quarantine period effects; and future expectations.
Results The results of the questionnaire showed that COVID-19 had a statistically significant impact on the daily life of the responders. There were statistically significant differences among the three involved categories, based on their answers.
Conclusion This study showed a statistically significant difference regarding the impact of COVID-19 on many aspects of the quality of life (protection, training, financial, and psychological aspects) of ENT physicians of various categories (residents, registrars, and consultants), and these effects may persist for a long time.
Minimally Invasive Reduction and Stabilization of Fractures of the Humeral Condyle by Skeletal Traction in Dogs: 18 Cases
Authors: Benedini Davide , Rovesti Gian Luca , Barbieri Fabio 
Published: July 2022

AbstractClosed reduction or limited open reduction in conjunction with internal or external fixation has been recommended as the preferred treatment for many types of fractures, but this technique has rarely been recommended for articular fractures because of the need for anatomic alignment of articular surfaces. However, the proposed benefits of closed reduction should be applicable to articular fractures if appropriate reduction and implant placement can be achieved. The aim of this study was to retrospectively evaluate a surgical technique for minimally invasive reduction and stabilization of fractures of the humeral condyle by means of intraoperative traction applied to the ulna under fluoroscopic guidance. Nineteen fractures of the humeral condyle in eighteen dogs were reduced by intraoperative osteotaxis applied by traction of the ulna, minimally invasive approach to the epicondyle and fracture stabilization under fluoroscopic guidance. Postoperative reduction was considered good or excellent in most fractures. This technique can be considered as a potential option for the treatment of condylar fractures, allowing for minimally invasive reduction and stabilization, thus avoiding the need for surgical exposure of the elbow joint.
Clinical Findings on Chromosome 1 Copy Number Variations
Authors: Leitão Filipa , Grangeia Ana , Pinto Joel , Passas Armanda , Dória Sofia 
Published: July 2022

AbstractCopy number variants (CNVs) are a major contribution to genome variability, and the presence of CNVs on chromosome 1 is a known cause of morbidity. The main objective of this study was to contribute to chromosome 1 disease map, through the analysis of patients with chromosome 1 CNVs.A cross-sectional study was performed using the array comparative genomic hybridization database of the Genetic Department of the Faculty of Medicine. Patients with pathogenic (P) or likely pathogenic (LP) CNVs on chromosome 1 were selected for the study. Clinical information was collected for all patients. Databases and related literature were used for genotype–phenotype correlation.From a total of 2,516 patients included in the database we identified 24 patients (0.95%) with P (9 patients) or LP (15 patients) CNVs on chromosome 1. These CNVs account for 6.1% (24/392 CNVs) of the total P/LP CNVs in the database. Most common CNVs found were in the 1q21.1–1q21.2 region.This study reinforces the association between chromosome 1 CNV and neurodevelopmental disorders and craniofacial dysmorphisms. Additionally, it also strengthened the idea that CNVs interpretation is not always a linear task due to the broad spectrum of variants that can be identified between benign and clearly pathogenic CNVs.
Language policy in Italian universities
Authors: Zuaro Beatrice , Soler Josep , Björkman-Nylén Beyza 
Published: July 2022

AbstractIn recent years, the significant expansion of English-medium instruction (EMI) programmes across higher education institutions outside English-speaking contexts has brought with it an inherent set of language-related tensions and ambiguities. In this article, we explore how a selection of Italian universities have tackled these tensions. Via a content analysis of university policy documents, we investigate the key language-related themes in them, and the orientations to language that these themes entail. The results show that English is seen as necessary for and almost synonymous to internationalisation, as well as a language that can bring benefits to both institutions and individuals. However, a commitment to multilingualism and to the promotion of Italian from a non-protectionist stance is apparent in the documents analysed. This finding, we argue, puts the Italian context apart from other settings that have been previously investigated (e.g. the Nordic countries), and points to an original way in which universities can navigate the language ambiguities that come with the process of higher education internationalisation.
Cosmic acceleration in Regge–Teitelboim gravity
Authors: Fabi S , Stern A , Xu Chuang 
Published: July 2022

Abstract
The Regge–Teitelboim formulation of gravity, which utilizes dynamical embeddings in a background space, effectively introduces a source term in the standard Einstein equations that is not attributable to the energy–momentum tensor. We show that for a simple class of embeddings of the k = −1 Robertson–Walker metric in a flat five-dimensional background, this source term generates cosmic acceleration.
Critique of the use of geodesics in astrophysics and cosmology
Authors: Mannheim Philip D 
Published: July 2022

Abstract
Since particles obey wave equations, in general one is not free to postulate that particles move on the geodesics associated with test particles. Rather, for this to be the case one has to be able to derive such behavior starting from the equations of motion that the particles obey, and to do so one can employ the eikonal approximation. To see what kind of trajectories might occur we explore the domain of support of the propagators associated with the wave equations, and extend the results of some previous propagator studies that have appeared in the literature. For a minimally coupled massless scalar field the domain of support in curved space is not restricted to the light cone, while for a conformally coupled massless scalar field the curved space domain is only restricted to the light cone if the scalar field propagates in a conformal to flat background. Consequently, eikonalization does not in general lead to null geodesics for curved space massless rays even though it does lead to straight line trajectories in flat spacetime. Equal remarks apply to the conformal invariant Maxwell equations. However, for massive particles one does obtain standard geodesic behavior this way, since they do not propagate on the light cone to begin with. Thus depending on how big the curvature actually is, in principle, even if not necessarily in practice, the standard null-geodesic-based gravitational bending formula and the general behavior of propagating light rays are in need of modification in regions with high enough curvature. We show how to appropriately modify the geodesic equations in such situations. We show that relativistic eikonalization has an intrinsic light-front structure, and show that eikonalization in a theory with local conformal symmetry leads to trajectories that are only globally conformally symmetric. Propagation of massless particles off the light cone is a curved space reflection of the fact that when light travels through a refractive medium in flat spacetime its velocity is modified from its free flat spacetime value. In the presence of gravity spacetime itself acts as a medium, and this medium can then take light rays off the light cone. This is also manifest in a conformal invariant scalar field theory propagator in two spacetime dimensions. It takes support off the light cone, doing so in fact even if the geometry is conformal to flat. We show that it is possible to obtain eikonal trajectories that are exact without approximation, and show that normals to advancing wavefronts follow these exact eikonal trajectories, with these trajectories being the trajectories along which energy and momentum are transported. In general then, in going from flat space to curved space one does not generalize flat space geodesics to curved space geodesics. Rather, one generalizes flat space wavefront normals (normals that are geodesic in flat space) to curved space wavefront normals, and in curved space normals to wavefronts do not have to be geodesic.
Enhancement of n-type conductivity of hexagonal boron nitride films by in-situ co-doping of silicon and oxygen
Authors: Kang Yun , Chen Le , Liu Caiyun , Tang Xuemei , Zhu Xingrui , Gao Wei , Yin Hong 
Published: July 2022

Abstract
Effective doping of ultra-wide band gap semiconductors is of crucial importance, yet, remains challenging. Here, we report the enhancement of n-type conductivity of nanocrystalline hexagonal boron nitride (h-BN) films with simultaneous incorporation of Si and O while deposition by radio frequency magnetron sputtering method. The resultant h-BN films are of ∼50 nm in thickness, containing nitrogen vacancy (VN) defects. Incorporation of O together with Si results in effective healing of VN defects and significantly reduces electric resistivity in h-BN thin films. X-ray photoelectron spectroscopy results reveal that under B-rich condition, the substitutional O in VN bonding with B leads to the formation of Si–N, which thus plays an important role to the n-type conductivity in h-BN films. The temperature dependent electrical resistivity measurements of the Si/O co-doped h-BN films reveal two donor levels of 130 and 520 meV at room temperature and higher temperatures, respectively. The n-h-BN/p-Si heterojunctions demonstrate apparent rectification characteristics at room temperature, where the tunneling behavior dominates throughout the injection regimes due to the effective carrier doping. This work proposes an effective approach to enhance the n-type conductivity of h-BN thin films for future applications in electronics, optoelectronics and photovoltaics.
Enhancing directivity of terahertz photoconductive antennas using spoof surface plasmon structure
Authors: Wang Chi , Zhang Zijian , Zhang Youfei , Xie Xinrong , Yang Yumeng , Han Jiaguang , Li Erping , Chen Hongsheng , Gu Jianqiang , Sha Wei E I , Gao Fei 
Published: July 2022

Abstract
Terahertz photoconductive antenna (PCA) is an important device for generating ultrabroadband terahertz radiations, being applicable in various scenarios. However, the metallic electrodes in PCAs, a pair of coplanar strip lines (CSL), always produce horizontal electrode modes in a broad THz band, thus resulting in low directivity in the vertical direction. Here, we introduce spoof surface plasmon polariton (SSPP) structures to suppress horizontal electrode modes in a broad band. The suppression principles are accounted to both the forbidden band of the fundamental SSPP mode and the orthogonality between source and higher-order SSPP modes. In the SSPP-modified PCA, we achieve around 2 dBi higher directivity in the vertical direction compared to a typical CSL PCA. Unlike the narrow bands inheriting from conventional metamaterial resonators, the relative operational band of the SSPP-modified PCA is as broad as 48%. This planar SSPP structure is compatible with the well-developed micro fabrication technologies. Thus, our scheme can be combined with the semiconductor material engineering and plasmonic nanoscale structures for further increasing THz output power.
Vision-based feet detection power liftgate with deep learning on embedded device
Authors: Liu Jianguo , Chen Yingzhi , Yan Fuwu , Zhang Rui , Liao Xinjia , Wu Youhua , Sun Yunfei , Hu Dafeng , Chen Nuo 
Published: July 2022

Abstract
Kick-Open power liftgates are the standard configuration for most high-end SUVs and sedans in recent years, but the traditional sensor-based trunk opening systems mainly rely on detecting the distance change between foot and vehicle to monitor the users’ operation intention, which is more sensitive to interference like weather change or unintentional body movement. We proposed a novel vision-based feet position detection power liftgate system, which detects the feet’ position through a deep learning model. Its framework is based on Nanodet, and the model is quantified and then convert and deploy on the low-power embedded system. We have trained the network using our dedicated dataset that considered various situations, including various weather conditions, different illumination conditions, different types of shoes in various seasons, and various ground surfaces. The total parameters of our model are 0.7M. In the test phase, our system works at 8FPS and reached a recognition accuracy rate of 93.3%, and a recall rate of 92%. Our system can be applied to low-cost embedded devices for automobiles and show satisfying performance and reliability.
Tristan10M detector: characterization of a large area detector for time resolved experiments based on Timepix3 chip
Authors: Chen Z. , Crevatin G. , Horswell I. , Spiers J. , Omar D. , Williams S. , Tartoni N. 
Published: July 2022

Abstract
Tristan10M is a 10-million-pixel large area detector based on the Timepix3 ASIC. The Timepix3 ASIC can work in event driven mode in addition to the standard frame based mode. Thanks to these capabilities of the Timepix3 ASIC, the Tristan detector is ideal for time-resolved experiments. The Tristan 10M detector is organized in a 2 × 5 module matrix, each module being made up of sixteen Timepix3 chips bump-bonded to a monolithic pixelated silicon sensor. In this contribution, we will report on the status of the detector development, and characterization results in terms of threshold equalization, energy calibration, and flat-field correction. A number of initial commissioning experiments have been carried out on the small molecule single crystal diffraction beamline I19 at Diamond light source, which we will also report on here. In particular, X-ray powder diffraction from a standard sample, LaB6, was performed to evaluate the inter-module alignment based on per-module basis.
Picosecond pulsed squeezing in thin-film lithium niobate strip-loaded waveguides at telecommunication wavelengths
Authors: Peace Daniel , Zappacosta Alexander , Cernansky Robert , Haylock Ben , Boes Andreas , Mitchell Arnan , Lobino Mirko 
Published: July 2022

AbstractAchieving a high level of pulsed squeezing, in a platform which offers integration and stability, is a key requirement for continuous-variable quantum information processing. Typically highly squeezed states are achieved with narrow band optical cavities and bulk crystals, limiting scalability. Using single-pass parametric down conversion in an integrated optical device, we demonstrate quadrature squeezing of picosecond pulses in a thin-film lithium niobate strip-loaded waveguide. For on-chip peak powers of less than 0.3 W, we measure up to −0.33 ± 0.07 dB of squeezing with an inferred on-chip value of −1.7 ± 0.4 dB. This work highlights the potential of the strip-loaded waveguide platform for broadband squeezing applications and the development of photonic quantum technologies.
A-03 Physical Therapy Compared to a Home Exercise Program for Protracted Pediatric Sport-Related Concussion Rehabilitation
Authors: Arvin N , Price A M , Seagraves B , Knell G , Burkhart S O 
Published: July 2022

Abstract
Purpose: The purpose of this study was to compare the recovery time in days between protracted recovery (greater than or equal to 28 days since injury) patients who were prescribed physical therapy and those who were prescribed a home exercise program. We hypothesized that physical therapy would be associated with shorter recovery times relative to the home exercise program. Methods: The 159 participants (aged 8–18) were drawn from an ongoing study. This study was a retrospective cohort design of sports-related concussion patients with a protracted recovery who presented to an outpatient specialty concussion clinic between 2018 and 2021, with data collected from electronic medical records. Both prescribed physical therapy (PPT) and home exercise program (HEP) patients were provided vestibular/ocular motor rehabilitation exercises to be completed at home three times per day. PPT participants must have completed at least three PPT sessions, or they were excluded from the study. Multi-variable zero-truncated negative binomial regressions were used to evaluate associations between groups. Results: Among the 48 (30.2%) PPT and 111 (69.8%) HEP participants, the majority were female (57.9%), age was 15.3 ± 1.4 (PPT) and 14.2 ± 2.8 (HEP), and days to clinic was a median 6.0 (IQR = 3.0–27.0; PPT) and 7.0 (IQR = 3.0–23.0; HEP). After adjusting for demographic (age, sex) and clinical measures (concussion history, convergence, VOMS score, and days to clinic), PPT was associated with an additional 1.21 days (95% CI: 1.06, 1.39) than HEP. Conclusions: We unexpectedly found that PPT was not associated with a shorter recovery time relative to HEP. Future research should explore this hypothesis while aiming to evaluate the effect of PPT versus HEP using a randomized design.
A-17 Effects Of Parental Mental Health On Patient and Parent-Reported Anxiety Symptoms Following Concussion In Adolescents
Authors: Gomes D , Manderino L M , Preszler J , Collins M W , Pan R , Santos J , Versace A , Kontos A P 
Published: July 2022

Abstract
Purpose: Examine the impact of parental mental health history on patient and patent-reported post-concussion symptoms of anxiety. Methods: Participants included 105 adolescents (42.9% male), 12–18 years old, including concussion patients (n = 72, 3.42 ± 1.7 days post-injury) and age-and-sex matched controls (n = 33). Patients and parents completed the Screen for Child Anxiety Disorders, Parent and Child versions (SCARED-P, SCARED-C) and medical histories. T-tests were used to compare control/concussed responses on the SCARED. Logistic regression (LR) was used to evaluate group predictors, as well as high/low (i.e., &gt;21 PCSS total score) concussion symptom groups at 30 days post-injury. Results: Results indicated that concussed SCARED-C (controls: M = 7.88 SD = 7.55, concussed: M = 13.4 SD = 11.42), (t[103] = −2.53, p = 0.01) and SCARED-P (controls: M = 3.55 SD = 3.62, concussed: M = 6.72 SD = 7.12), (t[103] = −2.42, p &lt; 0.01) scores were higher than controls. SCARED-C/SCARED-P scores were not predictive of high/low symptom report at 30 days post-injury, X2(2, n = 59) = 3.46, p = 0.18. The stepwise LR model was significant, X2(1, n = 105) = 7.34, p = 0.007; SCARED-C scores were predictive of concussion group inclusion, SCARED-P scores were not. In analyses of only patients whose parent reported a mental health history (22/105, 21%), there was no significant difference between control and patients on the SCARED-C, t(20) = −1.82, p = 0.08, or SCARED-P, t(20) = −0.34, p = 0.74. SCARED-C/SCARED-P scores did not predict control/concussion group inclusion, X2(2, n = 22) = 5.04, p = 0.08. Conclusions: SCARED-P/SCARED-C scores effectively differentiated between groups: patients and parents reported higher anxiety symptoms. The inclusion of parents with mental health diagnoses precluded the SCARED from differentiating controls from patients.
A-20 Factors Associated with Additional Clinic Visits in the Treatment of Sports-Related Concussion
Authors: Hou B Q , Yengo-Kahn A M , Hajdu K S , Tang A R , Grusky A Z , Zuckerman S L , Terry D P 
Published: July 2022

Abstract
Purpose: To determine the variables associated with additional concussion clinic visits before discharge to athletic trainer (AT). Methods: This retrospective cohort study was performed at a multi-disciplinary sports concussion center. Patients were eligible if they were ages 12–23, sustained a SRC and were seen by a clinic provider between 11/01/2017 and 10/01/2020 for concussion (n = 1504), presented to clinic within 3 months of sustaining a concussion, and had negative acute head imaging. Of 524 patients, 236 were discharged to AT after the initial clinic visit, while 288 patients required additional clinic visits. The following independent variables were assessed: age, sex, initial visit symptom score, history of prior concussions, psychiatric disorders, migraines, ADHD, and learning disorders, head imaging following concussion, family history of psychiatric disorders and migraines, and ED/Urgent Care visit. The primary disposition was patients being discharged to an AT following the initial clinic visit vs. having additional clinic visits prior to discharge to an AT. Results: The additional visit group had higher initial visit symptom scores (p = 0.002), head imaging performed more frequently (p &lt; 0.02), a family history of psychiatric disorders and/or migraines (p &lt; 0.001), more often reported a prior concussion (p = 0.02), and was younger (p = 0.014) compared to athletes with only one clinic visit. In a multiple variable model, family history of psychiatric disorders (OR = 3.12 [95%CI 1.53–6.34], p = 0.002), prior concussions (OR = 1.39 [95%CI 1.02–1.89], p = 0.037), greater initial symptom score (OR = 1.05 [95%CI 1.03–1.06], p &lt; 0.001), and younger age (OR = 0.87 [95%CI 0.77–0.98], p = 0.021) were strongly associated with additional visits. Conclusions: Among athletes treated at a regional sports concussion center, we determined that family history of psychiatric disorders, increased symptom score at initial visit, prior concussions, and younger age were each uniquely associated with needing additional clinic visits. Understanding these variables may guide treatment protocols to optimize efficiency.