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A comprehensive review of optical wireless power transfer technology

Frontiers of Information Technology & Electronic Engineering 2023年第6期24卷 767-800页

作者： syed agha hassnain mohsan Haoze QIAN Hussain AMJAD Optical Communication Laboratory Ocean CollegeZhejiang UniversityZhoushan 316021China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China Satellite Communication and Networking Laboratory Ocean CollegeZhejiang UniversityZhoushan 316021China

Ground-breaking optical wireless power transfer(OWPT)techniques have gained significant attention from both academia and industry in recent *** remote systems through laser diodes(LDs)to either operate devices or recharge batteries offers several *** LDs can remove the burden of carrying extra batteries and can reduce mission time by removing battery swap-time and *** from its appealing benefits,laser power transfer(LPT)is still a challenging task due to its low transfer *** this paper,we discuss the necessity and feasibility of OWPT and discuss several projects,working principle,system design,and *** addition,we show that OWPT is an essential element to supply power to Internet-of-Things(IoT)*** also highlight the impacts of dynamic *** outline several OWPT techniques including optical beamforming,distributed laser charging(DLC),adaptive-DLC(ADLC),simultaneous lightwave information and power transfer(SLIPT),Thing-to-Thing(T2T)OWPT,and high intensity laser power beaming(HILPB).We also deal with laser selection,hazard analysis,and received photovoltaic(PV)cell selection for OWPT ***,we discuss a range of open challenges and counter *** believe that this review will be helpful in integrating research and eliminating technical uncertainties,thereby promoting progress and innovation in the development of OWPT technologies.

关键词： Wireless power transmission Optical wireless power transfer Distributed laser charging Laser diode Solar cell

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Are doctors protected enough during COVID-19 in South Asia?

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Global Health Research and Policy 2021年第1期6卷 141-148页

作者： Nadia Nazir Jatoi Saniya Ahmad Emad ud-din Sajid Farah Yasmin Muhammad Sohaib Asghar syed Ali Farhan Bushra Zafar Sayeed Momina Mariam Marufi Kaneez Fatima syed Faisal Mahmood Department of Internal Medicine Doctor Ruth K.M.Pfau Civil HospitalDow University of Health SciencesBaba-e-Urdu RoadKarachiSindh 74200Pakistan Department of Internal Medicine Dow Ojha University HospitalSuparco RoadKDA Scheme 33KarachiSindh 75300Pakistan Department of Surgery Dow University of Health SciencesBaba-e-Urdu RoadKarachiSindh 74200Pakistan Division of Infectious Disease Department of MedicineAgha Khan University HospitalNational Stadium RoadKarachiSindh 74800Pakistan

Background:The highly contagious nature of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)places physicians in South Asia at high risk of contracting the ***,we conducted this study to provide an updated account of physician deaths in South Asia during the COVID-19 pandemic and to analyze and compare the different characteristics associated with physician mortality amongst the countries of the ***:We performed a cross-sectional study by using published news reports on the websites of news agencies from 9 selected countries in South *** study included only those physicians and doctors who died after contracting COVID-19 from their respective *** available data about the country of origin,type of,sex,age,medical or surgical specialty,and date of death were ***:The total number of physician deaths reported due to COVID-19 in our study was 170,with half(87/170,51%)of the deaths reported from *** physician deaths were reported to be 145(145/170=85%).Internal Medicine(58.43%)was the most severely affected *** highest physician mortality rate in the general population recorded in Afghanistan(27/1000 deaths).General physicians from India[OR=11.00(95%CI=1.06-114.08),p=0.045]and public sector medical practitioners from Pakistan[aOR=4.52(95%CI=1.18-17.33),p=0.028]were showing significant mortality when compared with other regions in multivariate logistic ***:An increased number of physician deaths,owing to COVID-19,has been shown in South *** could be due to decreased personal protective equipment and the poor health care management systems of the countries in the region to combat the *** studies should provide detailed information of characteristics associated with physician mortalities along with the main complications arising due to the virus.

关键词： doctor enough protected

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Thyroglossal Duct Anomalies in Pediatric and Adult Population: A 10-Year Experience in a Tertiary Care Hospital

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Surgical Science 2021年第7期12卷 226-235页

作者： Montasir Junaid Ghaleb Al-Sayed Sayed agha Ali Shah Hareem U. Khan Ali Mahdi Al Qannass Nadeem W. Malik Yahya Al Kahtani Ahmed Arghabi Abdul Aziz Ali Binhossan Sadaf Qadeer Ahmed Department of Otolaryngology-Head and Neck Surgery Armed Forces Hospital Khamis Mushait KSA Department of Pathology Armed Forces Hospital Khamis Mushait KSA Department of Otolaryngology-Head and Neck Surgery Stanford University Palo Alto USA Department of Otolaryngology-Head and Neck Surgery Sir Syed University of Medical Sciences for Girls Karachi Pakistan

Introduction: Thyroglossal duct cyst is a well-recognized congenital midline neck swelling observed in early childhood and rarely in adults. It may reveal itself as a painless cyst, abscess, or as fistula. Several studies have been conducted across the world, but the literature is scarce on its presentation and complications in the Middle East. This indexing study aims to report a 10-year experience with thyroglossal duct cyst (TGDC) presentation, excision, and recurrence at a teaching hospital in Saudi Arabia (KSA). Methods: A retrospective chart review was conducted at the Armed Forces Hospital Southern Region, KSA from December 2008 to December 2018. Data were retrieved from the electronic medical record system of the hospital and validated with the histopathology records. A total of 48 patients diagnosed as TGDC, sinus or fistula were identified. Stata ver. 16.1 was used to analyze the data and results formulated using regression model and Pearson’s chi-square test. Results: The majority of our patients were female (60.4%), and the most common presentation was a midline neck swelling which moved with tongue protrusion. Surgical excision via Complete Sistrunk procedure was the operation of choice in 60.5% followed by excision of the cyst with tract and sinus tract. Previous infection and surgical history contributed to complications in our patients, but no association of age or gender was observed. Patients presenting with infected and discharging cysts were found to be much more likely to develop a recurrence (9 patients). Cysts deep to the hyoid showed more recurrence [n = 7 (78%)] compared to superficial cysts [n = 2 (22%)] and posterior and multi-tract lesions also showed significant recurrence. Conclusion: Despite being a common cause of neck swelling, thyroglossal duct cyst is often missed on physical exams. To reduce complications, timely diagnosis and treatment are necessary.

关键词： Midline Neck Swelling Thyroglossal Duct Cyst Sinus Tract Sistrunk Procedure

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巴基斯坦原发性耐多药结核病流行情况

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国际结核病与肺部疾病杂志 2008年第2期3卷 73-77页

作者： A.Javaid R.Hasan A.Zafar A.Ghafoor A.J.Pathan A.Rab A.Sadiq C.M.Akram I.Burki K.Shah M.Ansari N.Rizvi S.U.Khan S.R.Awan Z.A.syed Z.H.lqbal Z.Shaheen N.ur Rehman 邢超 Department of Pulmonology Postgraduate Medical InstituteLady Reading Hospital Peshawar Department of Microbiology Agha Khan University HospitalKarachi TB Control Programme North West Frontier Province(NWFP)Peshawar Institute of Chest Diseases Kotri Department of Pulmonology Ayub Teaching HospitalAbbotabad Oiha Institute of Chest Diseases Karachi Gulab Devi Hospital Lahore Lyari General Hospital Karachi National TB Control Programme Islamabad Liaqat National Hospital Karachi Jinnah Postgraduate Medical Centre Karachi King Edwards Medical University Lahore Nishtar Medical College Multan Allama Iqbal Medical Lahore Wyeth(Pvt) Limited KarachiPakistan

背景:巴基斯坦是世界第6位结核病高负担国家。据世界卫生组织(WHO)估计,巴基斯坦结核病发病率为181/10万,全国每年新增结核病患者28.6万例。来自于医院的资料表明:巴基斯坦耐多药结核病(MDR-TB)问题已十分严重,急需在社区水平对耐多药... 详细信息

背景:巴基斯坦是世界第6位结核病高负担国家。据世界卫生组织(WHO)估计,巴基斯坦结核病发病率为181/10万,全国每年新增结核病患者28.6万例。来自于医院的资料表明:巴基斯坦耐多药结核病(MDR-TB)问题已十分严重,急需在社区水平对耐多药结核病的严重程度开展评估。本研究为针对巴基斯坦耐药结核病流行状况开展的横段面研究,所使用的痰标本来自于巴基斯坦全国742例未经治疗的新诊断的肺结核患者。目的:评估巴基斯坦原发性耐药的流行情况结果:在672例痰培养阳性患者中,有76例(11.3%)出现了对1种或多种抗结核药物耐药。36例(5.4%)患者对链霉素(10μg/ml)耐药; 51例(7.6%)患者对异烟肼(1μg/ml)耐药;15例(2.2%)患者对利福平(5μg/ml)耐药;12例(1.8%)患者对乙胺丁醇(10μg/ml)耐药;22例(3.3%)患者对吡嗪酰胺耐药。有46例(6.8%)患者痰标本中分离的结核菌株耐1种抗结核药物, 10例(1.5%)同时耐2种抗结核药物,12例(1.8%)同时耐3种抗结核药物,6例(0.9%)同时耐4种抗结核药物,2例(0.3%)同时耐全部5种抗结核一线药。原发性耐多药率为1.8%,(n= 12)(异烟肼1μg/ml,利福平5μg/ml)。结论:研究结果表明,巴基斯坦原发性耐多药率<2%,需要进一步实施有效的DOTS策略。

关键词：原发性耐药耐多药结核病巴基斯坦

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