bluuebunny/crossref_metadata_2025_split huggingface dataset:
Low Complexity Channel Estimation Algorithm Using Paired Spatial Signatures for UAV 3D MIMO Systems
Authors: Wan Yingqing , Xie Peizhong , Li Ting , Ju Renjie 
Published: May 2020

Abstract
This paper proposes a low complexity channel estimation algorithm for unmanned aerial vehicle (UAV) three dimension multi-user multiple-input-multiple-output (3D MIMO) systems with the uniform planar array (UPA) at base station (BS) using paired spatial signatures. With the aid of antenna array theory and array signal processing, firstly 3D channel modeling based on the angle between the direction of arrival (DOA) and the x- direction of the array antenna, and the angle between the DOA and the y- direction of the array antenna. And 3D MIMO channels can be projected onto the x- and y-directions, respectively. Then, channel estimation for multiuser uplinks using small amount of training resources, which is divided into two phases. The first phase is the uplink preamble phase, which assigns each user an orthogonal pilot, and obtains the paired spatial signatures and optimal rotation angle of each user through the same pilot sequence. We also propose a user grouping strategy based on three dimension angle-division multiple access (3D-ADMA) to ensure that the user's spatial signatures do not overlap. The second phase is much coherence times after the preamble phase, which assigns the same pilot sequence within a group and assigns orthogonal pilot sequences between groups, and the channel state information of the user's x- and y-directions is recovered by the paired space signatures and optimal rotation angle of each user obtained in the preamble phase, respectively. And dynamically updating the user's paired spatial signatures and optimal rotation angle utilizes the obtained channel components of x- and y-directions. Finally, the channel components of the x- and y-directions are reconstructed by the updated user's space signatures and the optimal rotation angle, and the 3D MIMO channel is generated by the Kronecker product. Compared with the conventional channel estimation method of a 3D MIMO system under UPA using a low rank model, the proposed methods greatly reduce the computational complexity without reducing the estimated performance, it is carried out with limited training resources, and the pilot resource overhead of the system is greatly reduced by the 3D-ADMA packet and the two-stage pilot allocation. Various numerical results are provided to corroborate the proposed studies.
Assessing Medical Students’ Knowledge of the Deaf Culture and Community in Puerto Rico: A Descriptive Study.
Authors: Lozano Andrea , Kung Michael , Rivera-González Lorena , Hernández-Blanco Yllen , Covas Vicente , Bonilla Anarys , Rodríguez-Ortiz Pedro , Durman Giovanna , Diaz-Algorri Yaritza , Vera Alexis , Chinapen Sandra 
Published: May 2020

Abstract
Background: Effective communication between health care professionals and Deaf and Hard of Hearing (D&HH) patients remains a challenge. Literature regarding health professionals’ knowledge of the D&HH community and their barriers towards health care access is limited in Puerto Rico and suggests a need for research. Therefore, this descriptive study aims to evaluate future physician’s knowledge about the Deaf culture and community in a student cohort at San Juan Bautista School of Medicine (SJBSM).Methods: A survey utilized in a previous study by Hoang et al. was targeted to 230 medical students to evaluate their knowledge of (D&HH) patients. The survey consisted of three parts testing awareness, exposure, and knowledge of the Deaf community. Responses from the Knowledge section were graded using an answer key, and correct answers were added to create an overall continuous sum score per participant, with higher scores meaning higher knowledge. Participants also were asked to write in possible issues deaf patients may face when hospitalized, excluding communication problems. All data were recorded and used for descriptive analysis.Results: 158 (68%) medical students participated. 63% reported exposure to D&HH people, and 80% were aware of the Deaf culture. 21% of students answered to have attended an American Sign Language (ASL) class, and 86% expressed interest in taking an ASL class. The overall percentage of correct answers of all the medical classes evaluated was 39%, with increasing percent knowledge as medical student year increased. The most frequently listed problem by respondents that deaf patients may face when hospitalized was dealing with an emergency in the hospital, such as the fire alarm.Conclusion: Students from clinical years (MSIII & MSIV) showed a better understanding of the Deaf culture when compared to students in pre-clinical years (MSI & MSII). Nevertheless, knowledge was limited in all groups. The information generated is not only valuable for our school but the health-care community as well. The literature related to Deaf culture, particularly in the medical setting in Puerto Rico, is limited. Therefore, there exists a need to continue investigating ways to improve medical students’ education of the Deaf culture and community.
Cystoplasty Combined Autologous Peritoneum with Ileal Seromuscular segment: a new model study
Authors: Shen Jun , Wu Junfeng , Zhao Qinyue , Li Chunfeng , Ruan Yingmao , Chen Xi , Ruan Yingmao 
Published: May 2020

Abstract
BackgroundAfter enterocystoplasty, some serious complications are presented, which are resulted from the chronic interaction between urine and intestinal epithelium. Composite cystoplasty is recommended as a method of surmounting these complications by replacing intestinal epithelium with autologous peritoneum.To develop a feasible surgical procedure for composite cystoplasty which can reduce serious complications postoperatively, keep sterility by excluding the possibility of contamination from the ileal contents, and provide a basis for the further clinical application of reconstruction bladder.MethodsSix female Chinese minipigs (CMP) were randomly chosen, weighted 28–33 kg. By intravenous anesthesia, bladder augmentation was carried out (implanting autologus peritoneum vascularized and, de-epithelialised ileal- seromuscular flaps. The composite cystoplasty used these flaps to mend and reconstruct bladders). Upon release of catheters and balloon at the fifth day, by monitoring the voiding behaviors of the pigs, routine pathology and immunohistochemistry were done by euthanizing the pigs at the 12th week.ResultsSix pigs experienced reconstruction, without complications. Ileum was 10 cm long, and the area of substitute peritoneum was 7 × 4 cm2. Voiding behavior was normal, and urine was clear in all animals after the catheter was taken out. Autopsy indicated that the fixed, bladder was in good condition, covered by continuous urothelium while the peritoneum disappeared, without regeneration of calculi, mucus, fibrosis, or ileal mucosa. Pathological examination demonstrated the success of the technique in developing the seromuscular flap without epithelial remnant. Bladders augmented with autologous peritoneum had fewer lymphocytes infiltration, indicating more effective urinary barrier function.Conclusion ﻿In this experimental porcine model, reconstruction bladder by autologous peritoneum and ileal seromuscular segment is an ideal approach since it can prevent regrowth of ileal epithelial cells and avoid the complications of conventional enterocystoplasty. The potential functions of the peritoneum are both protection and transitional support. This animal study provides a basis for further clinical application of the new enterocysplasty.
Does High and Intensive Care Reduce Coercion? Association of Hic Model Fidelity to Seclusion Use in the Netherlands
Authors: Melle A.L. van , Noorthoorn E.O. , Widdershoven G.A.M. , Mulder C.L , Voskes Y. 
Published: May 2020

Abstract
BackgroundA new inpatient care model has been developed in the Netherlands: High and Intensive Care (HIC). The purpose of HIC is to improve quality of inpatient mental healthcareand to reduce coercion.MethodsIn 2014, audits were held at 32 closed acute admission wards for adult patients throughout the Netherlands. The audits were done by trained auditors, who were professionals of the participating institutes, using the HIC monitor, a model fidelity scale to assess implementation of the HIC model. The HIC model fidelity scale (67 items) encompasses 11 domains including for example team structure, team processes, diagnostics and treatment, and building environment. Data on seclusion and forced medication was collected using the Argus rating scale. The association between HIC monitor scores and the use of seclusion and forced medication was analyzed, corrected for patient characteristics.ResultsResults showed that wards having a relatively high HIC monitor total score, indicating a high level of implementation of the model as compared to wards scoring lower on the monitor, had lower seclusion hours per admission hours (2.58 versus 4.20) and less forced medication events per admission days (0.0162 versus 0.0207).The HIC model fidelity scores explained 27% of the variance in seclusion rates (p< 0.001). Adding patient characteristics to HIC items in the regression model showed an increase of the explained variance to 40%. ConclusionsThis study showed that higher HIC modelfidelity was associated with less seclusion and less forced medication at acute closed psychiatric wards in the Netherlands.
Development and Validation of the Health-Friendly Activity Index: An Assessment Tool to Improve Consumers’ Health-Related Outcomes
Authors: Yun Young Ho , Oh Sinae , Sim Jin Ah , Lee Sujee , Sohn Eun-Jung 
Published: May 2020

Abstract
Objectives We developed the Health-Friendly Activity Index (HFAI) to measure the health-friendly activity of corporations or organizations comprehensively. We validated the developed tool and reported on its use as an assessment tool to improve consumers’ health-related outcomes.Study Design This is a cross-sectional studyPUBH-D-20-02610 Development of the HFAI questionnaire followed a three-phase process: item generation, item construction, and validation with field testing. Using relevance and feasibility criteria, we developed a 105-item questionnaire with six domains (Governance and Infrastructure, Needs Assessment, Planning, Implementation, Monitoring and Feedback, and Outcomes). To assess the sensitivity and validity of the questionnaire, we recruited two different groups. We assessed Group One (31 companies) based on their recent sustainability reports and compared their HFAI scores with the Contribution Assessment Tool for Consumer’s Health (CATCH) scores from 400 people from the general Korean population. For Group Two, we recruited 19 worksites and asked them to complete the HFAI and CATCH.Results Each domain of HFAI exhibited a Cronbach’s α coefficient between 0.382 and 1.000 for Group One and a Cronbach’s α coefficient between 0.676 and 0.938 for Group Two.
Consistency Between Optical Coherence Tomography and Humphrey Visual Field for Evaluating Glaucomatous Defects in High Myopic Eyes
Authors: Wen Wen , Zhang Yuqiu , Zhang Ting , Sun Xinghuai 
Published: May 2020

Abstract
Background:The study is to investigate the influence of high myopia on the consistency between optical coherence tomography (OCT) and visual field in primary open-angle glaucoma (POAG).Methods:We enrolled 37 patients with POAG with high myopia (POAG-HM group), 27 patients with POAG without high myopia (POAG group), and 29 controls with high myopia (HM group). All subjects underwent Humphrey perimetry (30-2 and 10-2 algorithms). The peripapillary retinal nerve fiber layer (RNFL) and macular ganglion cell-inner plexiform layer (GCIPL) thicknesses were measured using Cirrus HD-OCT. Spearman’s rank correlation analysis was used to determine correlations between OCT and perimetric parameters. Agreement was analyzed by cross-classification and weighted κ statistics. Results: In POAG group, the cross-classification analysis showed strong agreement between the inferior temporal GCIPL thickness and 10-2 MS (κ = 0.5447, P = 0.0048), and good agreement between the superior and inferior RNFL thicknesses and 30-2 MS (κ = 0.4407 and 0.4815; P< 0.05). In the POAG-HM group, only the inferior temporal GCIPL thickness showed good agreement with 10-2 MS (κ = 0.3155, P = 0.0289).Conclusions: In POAG patients with high myopia, changes in macular measurements were in accordance with visual field defects, and RNFL thickness did not consistently decline with visual field defects due to the effects of high myopia. This study suggests that during diagnosis and follow-up of glaucoma with high myopia, more attention need to be focused on structure and functional defects in macular areas.
Lessons Learned from Introducing the Characteristic of an Outstanding Medical Teacher: Its Implication in Role Modeling and Professionalism
Authors: Ahmady Soleiman , Namazi Hamidreza , Monajemi Alireza , Kohan Noushin 
Published: May 2020

Abstract
Background Role models play a crucial role in determining the professional development of medical trainees. The purpose of this qualitative descriptive study is to gain in-depth understanding of the outstanding qualities of one successful role model in Iran. We described his character, personality and merits as a conceptual framework for role modeling in medical education.Methods Qualitative descriptive study. Inductive content analysis was performed, and data were collected by conducting interviews. The study was done in the school of medicine of Tehran University of Medical Sciences in Iran. Twenty five medical students, medical graduates and faculty members participated in 25 interviews from April to December 2019. The participants were recruited via purposive sampling.Results Five themes, 13 subthemes, and 46 categories were extracted from the data, and the conceptual framework of role modeling in medical education was developed.Conclusion In this study, we designed a framework for role modeling in medical education Based on this framework, role models in medical education can function as mentors, medical leaders, clinical teachers, and professional instructors. Overall, role modeling is an important concept in medical education, and results of this article contributes to maintain the high quality of medical education.
The effect of COVID-19 pandemic on air quality caused by traffic in Istanbul
Authors: KASKUN Songül , ULUTAŞ Kadir 
Published: May 2020

Abstract
The COVID-19 pandemic has become global public health concern and the first death due to COVID-19 in Turkey occurred on 16 March 2020. Therefore, the Turkish governments took some precautions such as curfew, travel restriction, social isolation and shut down the schools and the universities within the scope of the fight of COVID-19. These precautions may cause a decrease in mobility, which in turn expectation to decrease in traffic-related emissions. In this study, the change in the amount of PM10 and NO2 pollutants were evaluated by dividing them in two periods before and after the virus in 2016 and 2020. Traffic-induced PM10 and NO2 concentrations were monitored at 4 stations located close to road traffic in Istanbul. As a result of the study, it was observed that there was no significant difference in PM10 concentration, however NO2 concentrations decreased by 11.8 percent in the after-virus period.
A survey of an eight-breed cross swine heterogeneous population demonstrates the associations among immune cell traits, lung lesions and Mycoplasma abundances
Authors: Zhang qing , Li jing , Huang tao , Zhang yifeng , Xu wenwu , Huang lusheng , Ai huashui , Yang bin 
Published: May 2020

Abstract
Background: Developments of pulmonary diseases, often accompanied by infections of bacteria, severely affect meat production and welfare of pigs. This study investigated the association of lung lesions and Mycoplasma levels inferred from 16S rRNA sequencing of bronchoalveolar lavage fluid with 57 immune cells and 25 hematological traits in 307 pigs at age of 240 days from an eight-breed heterogeneous cross.Result: At a false discovery rate threshold of 0.05, we found that the greater severity of lung lesions were significantly associated with higher CD8+ to CD3+ cell ratio (CD8+/CD3+), neutrophil to lymphocyte ratio (NLR), and standard deviation of red blood cell volume distribution width (RDW-SD), and lower CD4-CD8-/CD3+, CD3+CD4-CD8-/PBMCs, CD14-CD16-/PBMCs, mean corpuscular hemoglobin concentration (MCHC), lymphocyte count (LYM) and lymphocyte count percentage (LYMR), reflected an status of inflammation, immune suppression and hypoxia of the pigs accompanying the development of the lung lesion. The Mycoplasma abundance showed positive correlations with neutrophil count (NEU), neutrophil count percentage (NEUR), neutrophil-to-lymphocyte ratio (NLR), monocyte count (MON), RDW-CV, and RDW-SD, and negative correlations with MCHC, LYM, and LYMR, these correlations are largely consistent with those of lung lesions, supporting the comorbidity of lung lesions and Mycoplasma infection. We also observed a nonlinear association that the sharp increases in NEU and NEUR occurred only when Mycoplasma abundance raised to a level above the population-average. Conclusion: This study showed that the pigs from an eight-breed cross heterogeneous population reared under standardized housing conditions suffered lesion averagely covered 40% of lung, and the lung lesions were significantly linked to load of Mycoplasma in bronchoalveolar lavage fluid. We further demonstrated that the lung lesion and load of Mycoplasma perturb a large variety of immune and hematological traits. These associations provide helpful insights into the changes of host immune status in response to mycoplasma relevant lung diseases in pigs.
A new technique for ureteral reconstruction using lingual mucosa grafts in a beagle model
Authors: Xu Yujie , Sun Lin , Pan Qiufeng , Hua Xiaoliang , Li Bing 
Published: May 2020

Abstract
Background The ideal technique for ureteral reconstruction has not been established yet. We report our initial experiment to investigate the feasibility of ureteral reconstruction using lingual mucosa graft (LMG) and to evaluate the histological changes of the engrafted LMG in beagles.Methods Twelve male beagle dogs were randomly divided into groups A, B and C (n = 4). A ventral ureteral defect was created by excising half of the ureteral wall. The length of the defect was 3 cm, 6 cm and 10 cm in groups A, B and C, respectively. The LMGs were harvested and employed to repair the ureteral defects in an onlay fashion. Two dogs per group were sacrificed after 6 months, with an additional 2 dogs per group sacrificed after 12 months. Intravenous urography (IVU) and macroscopic examination were performed to evaluate renal function and ureteral patency. Histological changes in the engrafted LMGs during the tissue incorporation process were assessed by histological analysis.Results There were no postoperative complications. Only one dog in group C developed a mild stricture near the proximal anastomosis. In the remaining 11 animals, IVU showed normal renal function and a wide ureteral caliber without stricture or fistula. The diameter of the LMG-reconstructed ureter was greater than that of the proximal and distal ureter (each p value < 0.01). The LMGs survived in situ with newly formed capillaries. The epithelium of the lingual mucosa resembled the urothelium in postoperative 12 months.Conclusions This new technique for ureteral reconstruction using LMGs is feasible. This approach is a promising alternative clinical treatment for curing long ureteral strictures.
Traditional Chinese Medicine Might Reduce Risk of Dementia in Patients with Parkinson’s disease: A Population-based Nested Case-control Study
Authors: Liang Yun-Tzu , Lin Chia-Yang , Wang Yu-Hsun , Chou Hsi-Hsien , Wei James Cheng-Chung 
Published: May 2020

Abstract
Background Patients who have Parkinson’s disease (PD) comorbid with dementia is common. With the prolonged life expectancy, dementia is gradually becoming prevalent and affects most patients’ life qualities. However, the efficacy of current treatments in dementia of Parkinson’s disease is limited. Previous studies indicated the potential roles of Traditional Chinese Medicine (TCM) in treating dementia, yet its effects in preventing dementia from Parkinson’s patients are unknown.Methods This case–control study was nested within a national health insurance database of patients over 50 years old with newly diagnosed Parkinson’s disease from year 2000 to 2010. Among these PD patients, dementia and non-dementia groups were discussed respectively in terms of the duration of taking TCM (≥ 90 days versus < 90 days), age (50–64 versus ≥ 65) and gender.Results The risk of dementia in patients with Parkinson's disease is decreased by using TCM for < 90 days and ≥ 90 days, especially in the group who took TCM for more than 90 days. The use of TCM significantly reduces the risk of dementia in the subgroups of age ≥ 65 years, female patients using TCM for both < 90 days and ≥ 90 days, and male patients using TCM for < 90 days. Overall, we can see the protection tendency among all of the target population under TCM use.Conclusions The results showed that there is a significant reduction of nearly 38% in the risk of dementia for patients with Parkinson’s disease after the usage of Traditional Chinese Medicine. The beneficial effects for using TCM ≥ 90 days in women age ≥ 65 years are most prominent.Trial registration The study data were acquired from the Taiwan’s National Health Insurance (NHI) Research Database. The NHI-claimed data provide clinical information for population-based epidemiologic research. This study was approved by the Institutional Review Board of Chung Shan Medical University Hospital.
MusicCohort: Cross-sectional feasibility study of an assessment protocol for student musicians
Authors: Bruder Julius , Ballenberger Nikolaus , Villas Bethany , Haugan Charlotte , McKenzie Kimiko , Patel Zalak , Mevawala Amynah , Zalpour Christoff , Guptill Christine 
Published: May 2020

Abstract
This study examined the feasibility of employing an assessment battery developed in Germany, investigating mental and physical health of university music students, in Canada. Using a cross sectional design, first-semester music and control students were recruited at two university campuses. Eligibility criteria were: 1) first-semester, full-time undergraduate music major (case) or in another university program (control), 2) over the age of 16. Exclusion criteria were: 1) diagnosis of neurological, orthopaedic or psychological condition, 2) diagnosis of infection or systemic disease, 3) regular consumption of medication for pain or mental health diagnosis, 4) varsity athlete, 5) for controls only, enrollment in music courses where a grade is assigned for music performance (e.g. studio lessons). Both groups completed questionnaires and physical testing, including range of motion, core strength and pressure pain threshold. Data for 19 music and 50 control students were analysed. Musician participants demonstrated tendencies towards poorer mental and physical health. This German protocol is feasible in a Canadian university setting. Canadian music students demonstrate similar mental and physical health outcomes to those in the literature and in the parent study. The results of this feasibility study should be confirmed in a larger study.