bluuebunny/crossref_metadata_2025_split huggingface dataset:
Special Relativity sans Lorentz Transformation (OR) Perceptional Relativity
Authors: ASOKAN SEBASTIN PATRICK 
Published: June 2021

Abstract
This paper shows that from the fact that the same Reality is perceived differently by the observers in different inertial frames, we can draw a simple and straightforward explanation for the constancy of light's speed in all inertial frames without any need for bringing in paradoxical Lorentz Transformation. This paper shows that the premise that each inertial frame has its unique time, which Lorentz Transformation introduced to explain the constancy of the speed of light in all inertial frames is incompatible with the interchangeability of the frames, an essential requisite of the First Postulate of the Special Theory of Relativity. This paper also points out the misconceptions regarding the claimed experimental verifications of Lorentz Transformation's predictions in the Hafele–Keating experiment and μ meson experiment. This paper hints at the possibility of attributing the observed slowing down of fast-moving clocks to the Relativistic Variation of Mass with Velocity instead of Time Dilation. This paper concludes that Einstein's Special Theory Relativity can stand on its own merits without Lorentz Transformation.
Transverse dural arteriovenous fistula with bilateral sigmoid sinus stenosis treated with via transarterial embolization and venous stent placement: case report
Authors: Yu Zeran , Song Hai , Long Jiang , Cao Yiqiang , Wang Yonggang , Yang Xiang 
Published: June 2021

Abstract
BackgroundDural arteriovenous fistulas (DVAF) is a cerebrovascular disorder due to abnormal connections within meningeal arteries and cerebral veins. It is usually associated with sinus stenosis.Case PresentationWe describe a case of DAVF with bilateral sigmoid sinus stenosis successfully treated via transarterial embolization and unilateral stenting.ConclusionThe author reported a rare case of DAVF associated with with bilateral sigmoid sinus stenosis. Direct embolization with catheterization of contralateral MMA may by an alternative way to treat partial embolized DAVF, when main feeding arteries were occluded due to previous treatment. Unilateral sinus recanalization for bilateral sinus narrows could also obtain obvious benefit.
Sustainable Cationic Cellulose for Highly Efficient Flocculation of Suspended Particles
Authors: Li Zhen , Gong Wenli , Chen Xuan , Liu Lin , Meng Ranju , Ding Yanhong , Yao Juming 
Published: June 2021

Abstract
Sustainable, cationic cellulose bio-flocculants with various amino group contents were successfully prepared by a feasible chemical crosslinking with polyethyleneimine (PEI). The flocculation performances of diverse PEI-grafting cellulose (CE-PEI)were evaluated topurify sewage sludge treatment. Further, the preparation conditions and flocculation mechanismof CE-PEI were investigated. Benefiting from the high surface positive charges and the supramolecular structure of PEI, the results indicate that CE-PEI could remove the turbid Kaolin suspension effectively. The efficiency of CE-PEI for removing the turbid in Kaolin suspension is 98.2%.Flocculation kinetic results indicated that charge neutralization was the dominant mechanism for the flocculation process. And then, the small Kaolin particles agglomerate together to form large flocs by the function of adsorbing, gathering, and enwrapping. Thus, this work not only exploits a promising application of cellulose as a bio-flocculantbut also provides a feasible approach to efficiently purify high turbidity wastewater.
Case Report Series: Clinical Analysis of Severe Deep Neck Space Infection
Authors: Jin Ling , Fan kai , Liu Shuangxi , Tan Shiwang , Wang Yang , Zhao Yumin , Shaoqing YU 
Published: June 2021

Abstract
BackgroundSevere deep neck space infection is rare and critical.The objective is to deepen the understanding of severe deep neck space infection and improve the level of clinical diagnosis and treatment. Case presentationA retrospective analysis of the diagnosis and treatment of 5 cases of serious deep neck infections admitted to our department. The 5 patients were all diagnosed by cervical CT and surgical exploration. 3 patients with diabetes, 2 patients with diabetic ketoacidosis, 3 patients with mediastinal infection; 3 patients underwent tracheotomy and 2 patients with tracheal intubation; All patients were treated by neck incision, drainage, dressing change and targeted antibiotics. Conclusions﻿Severe deep neck infections are prone to occur in patients with diabetes and other systemic basic diseases. Early diagnosis, timely neck incision exploration, drainage to maintain airway patency and targeted antibiotic treatment are the keys to diagnosis and treatment.
Mobile Phone Access and Preferences Among Medical Inpatients at an Urban Canadian Hospital: A Cross-Sectional Survey
Authors: AboMoslim Maryam , Ghaseminejad-Tafreshi Niloufar , Babili Abdulaa , Joueidi Samia El , Staples John A , Tam Penny , Lester Richard 
Published: June 2021

Abstract
Background: Digital health interventions are increasingly used for patient care, yet little data is available on the phone access type and usage preferences of medical ward patients to inform the most appropriate digital interventions.Methods: To learn about mobile phone ownership, internet access, and cellular use preferences among medical patients, we conducted a researcher-administered survey of patients admitted to five internal medicine units at Vancouver General Hospital (VGH) in January 2020.Results: A total of 81 ward patients completed the questionnaire from the two survey dates. Of those, 63.0% owned their own mobile phone, an additional 22.2% had access to a mobile phone via a proxy (or an authorized third-party) such as a family member, and 14.8% did not own or have access to a mobile phone. All participants with mobile phone access had cellular plans (i.e., phone and text) ; however, a quarter of respondents did not have data plans with internet. 71.1% of men owned a mobile phone compared to only 52.8% of women. All participants at a ‘high’ risk of readmission had access to a mobile phone, either as phone-owners or proxy-dependent users.Conclusion: Access to mobile phones among medical ward patients was high, but incomplete. More patients had cellular than data plans (i.e., internet and applications). Understanding patient-specific access is key to informing potential uptake of digital health interventions aimed at using patients’ mobile phones (mHealth) from an effectiveness and equity lens.
Micro RNA-146a effect on Periodontitis is Independent on OPG/RANKL Axis
Authors: Sattari Mandana , Ghotloo Somayeh , Taheri Ramezan-Ali , ArefNezhad Reza , Motedayyen Hossein 
Published: June 2021

Abstract
Background

MicroRNA-146a (miR-146a) is a regulator of inflammatory response. Periodontitis is a disease with immune pathophysiology of the periodontium in which the inflammation results in the destruction of the soft tissues and alveolar bone. Therefore, this study was investigated whether miR-146a may contribute to periodontitis through affecting the levels of OPG and RANKL.
Methods

The levels of miR-146a, RANKL, and OPG in gingival tissues from patients with generalized periodontitis stages II and III and grades A and B (n = 15, group A), patients with generalized periodontitis stages III and IV and grade C (n = 15, group B), and healthy individuals (n = 10) were determined by real-time PCR. The associations of miR-146a expression with OPG and RANKL levels were evaluated.
Results

The levels of miR-146a in two subgroups within periodontitis patients were significantly higher than healthy subjects (P < 0.0001). MiR-146a showed the increased level in group A of patients compared with group B (P < 0.05). Clinical parameters such as probing depth (PD) and clinical attachment loss (CAL) were significantly higher in patients than control group (P < 0.05). The levels of OPG and RANKL were increased in patients compared with healthy subjects, although the elevated levels were not statistically significant. MiR-146a was not associated with the levels of OPG and RANKL.
Conclusion

The results of this study failed to show the effect of miR-146a on the pathophysiology of disease through OPG/RANKL axis.
Clinical Relevancy:

MiR-146a may participate in the pathophysiology of disease through independent mechanism(s) of OPG/RANKL axis.
Motivational Determinants of Physical Activity in Disadvantaged Populations with (Pre)Diabetes: A Cross-Cultural Comparison
Authors: De Man Jeroen , Kasujja Francis Xavier , Delobelle Peter , Annerstedt Kristi Sidney , Alvesson Helle Mölsted , Absetz Pilvikki , Wouters Edwin , Daivadanam Meena , Guwatudde David , Puoane Thandi , Remmen Roy , Tabana Hanani , Olmen Josefien Van 
Published: June 2021

Abstract
BackgroundUnderstanding motivational determinants of physical activity (PA) is essential to guide the implementation of PA at individual and population level. Knowledge about the cross-cultural generalizability of these determinants is lacking and they have mostly been studied as separate factors. This study compares a motivational process model across samples from diverse populations with, or at risk of diabetes. MethodsMeasurement invariance of barrier identified regulation, barrier self-efficacy and social support was assessed in a rural Ugandan sample (n=712) and disadvantaged samples with high proportions of immigrants in urban South Africa (n=566) and Sweden (n=147). These motivational determinants were then compared through multigroup structural equation modeling.ResultsThe studied motivational constructs showed scalar invariance. Latent mean levels of perceived social support and barrier self-efficacy were lower in South Africa and Sweden. Structural models (for different PA outcomes) were not consistent across settings except for the association between perceived social support and identified regulation. Identified regulation was only associated with vigorous PA in Uganda and with moderate PA in South Africa. The association between social support and PA outcomes ranged from weak to not significant and the association between self-efficacy and PA was not significant. Self-reported PA was highest in Uganda and lowest in Sweden. Self-reported vigorous PA was significantly related to lower hemoglobin A1c levels, while moderate PA was not.ConclusionsFindings suggest that: 1) it is feasible to compare a motivational process model across diverse settings; 2) there is lower perceived social support and self-efficacy in the urban, migrant samples; 3) identified regulation is a more promising determinant of PA than self-efficacy or social support in these populations; 4) associations between motivational determinants and PA depend on the perceived type and/or intensity of PA; 5) perceived relatedness functions as a basic psychological need across diverse settings; and 6) people’s perception of the PA they perform depends on their perceived level of intensity of PA which would have major implications for health promotion.
Comparison of balloon dilation tract real-time monitored by ultrasound combined with endoscopic versus unitary ultrasound guided in percutaneous nephrolithotomy: a retrospective study
Authors: Ding Demao , Wang Daming , Xie Dongdong , Liu Zhiqi , Wang Dengdian , Li Enlai , Yu Dexin 
Published: June 2021

Abstract
Background: The establishment of tract is very important in percutaneous nephrolithotomy. At present, balloon dilatation is widely used, but ultrasound or fluoroscopy guided balloon dilatation tract can not achieve real-time monitoring of the whole process, which easily leads to failure of tract establishment. we use ultrasound combined with endoscopic technology to realize the whole process monitoring of tract establishment. The purpose is to evaluate the safety and effectiveness of the technology.Methods: Patients who underwent PCNL with only using the balloon dilator from January 2019 to April 2021 in the Second Affiliated Hospital of Anhui Medical University were retrospectively reviewed. They were divided into ultrasound combined with endoscopic guidance group and ultrasound-guided group. The demographic and renal stone characteristics, intraoperative and postoperative data were analyzed.Results: A total of 72 patients were included in the study, including 35 patients in the ultrasound combined with endoscopic guidance group and 37 patients in the ultrasound-guided group. There was no difference in demographic and stone characteristics between the two groups.There were no significant differences between the two groups in surgical time, number of tract, hemoglobin decreased, stone free rate, ancillary treatment and postoperative complication rate. The tract establishment time of the ultrasound combined with endoscopic guidance group was significantly less than that of the ultrasound-guided group (P<0.05). There was no tract establishment failure in the ultrasound combined with endoscopic guidance group, while there were 7 cases in the ultrasound-guided group.Conclusions: Ultrasound combined with endoscopic guidance can monitor the establishment of working tract of PCNL in real time. Compared with unitary ultrasonic guidance, the time of tract establishment can be shortened and the failure of tract establishment can be avoided.
Spontaneous Partial Recovery of Striatal Dopaminergic Uptake Despite Nigral Cell Loss in Asymptomatic MPTP-Lesioned Minipigs
Authors: Landau Anne M. , Lillethorup Thea P. , Noer Ove , Alstrup Aage Kristian Olsen , Stokholm Kathrine , Thomsen Majken Borup , Zaer Hamed , Orlowski Dariusz , Mikkelsen Trine Werenberg , Glud Andreas N. , Nielsen Erik Holm Toustrup , Schacht Anna , Winterdahl Michael , Brooks David J. , Sørensen Jens Christian H. 
Published: June 2021

Abstract
The gold standard animal model of Parkinson’s disease is the non-human primate rendered parkinsonian with the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) toxin. Low availability, ethical issues, and primate-specific biohazards make alternative large animal models necessary. Here, we investigate the temporal evolution of presynaptic dopaminergic function after MPTP in another large animal model, the Göttingen minipig. We subcutaneously injected seven sedated minipigs with 1–2 mg/kg of MPTP, and two minipigs with saline, three times a week over 4 weeks. We monitored behavioral deficits using a validated motor scale and a Gait4Dog® walking mat. Minipig brains were imaged with (+)-⍺-[11C]-dihydrotetrabenazine ([11C]-DTBZ) and [18F]-fluorodopa ([18F]-FDOPA) PET at baseline and 1, 3, 9 and 12 months after the final MPTP injection. Immunohistochemical tyrosine hydroxylase (TH) staining was used to assay nigral TH + area loss post-mortem. The minipigs showed only mild bradykinesia and impaired coordination at early timepoints after MPTP. PET revealed decreases of striatal [11C]-DTBZ and [18F]-FDOPA uptake post-MPTP with a partial spontaneous recovery of [18F]-FDOPA after 9 months. Postmortem histological analysis showed a loss of 71% TH-immunopositive area in the substantia nigra. When testing the efficacy of putative neuroprotective agents, partial spontaneous recovery of dopamine terminal function must be taken into account in the MPTP minipig model of parkinsonism.
Optimization of Furniture Configuration for Residential Living Room Spaces in Quality Elderly Care Communities of Macao
Authors: WANG XIAOXIAO , Shi Ruiting , Niu Fangru , Liang Siyang 
Published: June 2021

Abstract
Living conditions in Macao are characterized by dense population, land shortage, and old residences, especially on the Macao Peninsula. This paper explores the demands and living conditions of different types of aged residents of the Youhan Community of Macau by questionnaire survey and research analysis. The demands and living conditions are then classified and summarized through quantitative analysis, and their correlations are identified. Based on ergonomics and the physical, psychological, and behavioral habits of aged people, issues are identified that require attention when configuring furniture for different types of aged people in their residential living spaces. Finally, by combining the demands of different types of aged people with the issues that need attention, several criteria on interior furniture configuration are proposed for different types of aged people. This paper presents a preliminarily quantifiable model for living room furniture configuration from the perspective of aged people.
Epithelial-Myoepithelial Carcinoma of The Minor Salivary Glands: Report of Two Cases with Literature Review
Authors: Okuyama Kohei , Michi Yasuyuki , Kashima Yoshihisa , Tomioka Hirofumi , Hiral Hideaki , Yokokawa Misaki , Yamagata Yuko , Kuroshima Takeshi , Sato Yuriko , Tsuchiya Maiko , Kayamori Kou , Ikeda Tohru , Harada Hiroyuki 
Published: June 2021

Abstract
Epithelial-myoepithelial carcinoma (EMC) is a rare malignant salivary gland tumor, which is especially uncommon in the minor salivary glands (MSG). We report literature review of EMC of the MSGs with our experience of two cases. Case 1 is a 75-year-old woman with a hard elastic mass in the hard palate, sized 2.5 × 2 cm without ulceration. Incisional biopsy was suggestive of pleomorphic adenoma. Tumor resection was performed with adequate surgical margin. Case 2 is a 44-year-old woman with a mass in the hard palate, sized 1.8 × 1.6 cm without ulceration. Incisional biopsy was suggestive of pleomorphic adenoma or a low-grade salivary gland carcinoma and intraoral tumor resection was performed. Both have good postoperative courses and are alive with no evidence of local recurrence or metastasis at 25 and 10 months. The Ki-67 labeling index in Case 1 and 2 were 10.6 and 3.8 %. Considering that the anatomy, structure, and size of salivary glands are quite different from MSGs, EMCs of the MSG cannot be predicted similarly to EMCs of the major salivary glands. The present review with 18 cases revealed no consensus on treatment methods for MSG cases other than surgery.
Effects of slurry reflux on the stability and microbial community structure of corn stalk anaerobic digestion system
Authors: Zhao Ling , Gao Yang , Zhao Jiamin , Sun Jiaxing , Wang Zhen , Li Jinyang , Kou Wei 
Published: June 2021

Abstract
Anaerobic digestion(AD) of corn stalks with slurry reflux and non-reflux was compared and evaluated,to clarify the effects of slurry reflux on AD. The reflux of slurry increased methane production by 45.8% and also improved the buffer capacity and adaptability to high organic load rate(OLR). The results of high-throughput sequencing showed that slurry reflux increased the richness of bacterial and archaea community, and decreased the diversity of the microbial community. Slurry reflux also reduced the tendency of the enrichment of Chloroflexi and the relative abundance of Methanothrix. The increase of OLR changed the main methanogenic pathway in the anaerobic digestion system, slurry reflux could slow down this trend.
Effects of End-of-life Care Stress, Calling, and Resilience on End-of-life Care Performance - A Descriptive Correlational Study
Authors: Kim Ji-Young , Choi Eun-Hi 
Published: June 2021

Abstract
Background: Prolonging the end-of-life process means that the duration of health care work increases and the management of death is delegated to health care providers by patients’ families. Thus, it is important to explore measures to enhance the quality of end-of-life care by identifying the predictors thereof. End-of-life care should be people-centred, relieving serious health-related suffering, be it physical, psychological, social, or spiritual. Nurses who provide end-of-life care usually spend the most time with dying patients, administering care to help patients who wish to die with dignity; therefore, end-of-life nursing care is highly significant. Methods: This study was conducted on nurses of 500-bed or larger university hospitals in city D and province C from 20 August to 10 September 2020 using a structured questionnaire. A total of 213 nurses with a minimum clinical career of one year and at least one EOLC experience participated. The final analysis sample consisted of 206 nurses. Descriptive analysis, Pearson’s correlation coefficients, ANOVA, t-test, and multiple-regression analysis were used to analyse the data.Results: This study found that end-of-life care performance was significantly positively correlated with end-of-life care stress [r = .253, p < .001], sense of calling [r = .424, p < .001], and resilience [r = .397, p < .001]. End-of-life care stress [β = .185, p = .003], sense of calling [β = .259, p < .001], resilience [β = .252, p < .001], and working in a hospice ward [β = .140, p = .041] or intensive care unit [β = .218, p = .008], as opposed to the emergency department, were identified as predictors of end-of-life care performance. These factors explained 28.3% of the variance in the end-of-life care performance in this study.Conclusions: Boosting the sense of calling and resilience and reducing the end-of-life care stress among nurses providing palliative care can improve overall end-of-life care performances. Subsequent studies should develop and evaluate interventions and programs that could improve these factors to ensure a positive change in health care and enhance the quality of end-of-life care in hospitals.
Clinical Elective Course and Its Effects on Medical Students and Graduates of Jordanian Medical Schools
Authors: Al-Taher Raed , Al-Ani Ruba , Al-Ani Abdullah , Rashdan Mohammad , Manasrah Abderrahman , Aborajooh Emad , Al-Balas Hamzeh , Al-Balas Hasan , Al-Balas Mahmoud , Ateyyat Maymounah , Qasem Nuha 
Published: June 2021

Abstract
Background: Elective course is one of 6th-year medical schools curriculum in Jordan. Students choose the specialty they wish to spend 8 weeks in and choose the place even if it is outside their universitys' affiliated hospitals. In this study, we try to understand students' choices regarding the country of elective, their specialty, type of placements (observership/ clerkship), and participants' perspectives about the elective course and its general value.Methods: Cross-sectional study. The survey distributed through social media platforms (mainly Facebook and Whatsapp) targeting 6th-year medical students and doctors who graduated from one of the 5 Jordanian medical schools (the University of Jordan, Jordan University of Science and Technology, Mutah University, Yarmouk University, Hashemite University). Results: The majority of participants had international elective (69.6%), mainly in the USA followed by the UK. Internal medicine was the field of interest for 14.8%, followed by general surgery 11.2%. 241 (62.6%) actively participated in the elective as they had a clerkship/ hands-on experience. In contrast, 142 (36.9%) were observers. The majority indicated that the elective is worth time, money, and effort. Moreover, they had adequate supervision throughout the course and could achieve their preset objectives. Conclusions: the elective course gives a unique experience to our students. The general satisfaction is an indicator of the success of the course in exposing medical students to clinical practice actively.