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Simulation of Fluid Flow in a Channel Induced by Three Types of Fin-Like Motion

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Journal of Bionic Engineering 2007年第3期4卷 165-176页

作者： Wojciech Kowalczyk Antonio delgado Institute of Fluid Mechanics University of Erlangen-NurembergCauerstr. 4D-91058 ErlangenGermany

One of many interesting research activities in biofluidmechanics is dedicated to investigations of locomotion in water. Some of propulsion mechanisms observed in the underwater world are used in the development process of underwater autonomic vehicles （AUV）. In order to characterise several solutions according to their manoeuvrability, influence on the surrounding fluid and energetic efficiency, a detailed analysis of fin-like movement is indispensable. In the current paper an analysis of undulatory, oscillatory and combined fin-like movements by means of numerical simulation is carried out. The conservation equation of mass and the conservation equation of momentum axe solved with the Finite Volume Method （FWM） by use of the software CFX-10.0. The undulatory and oscillatory fin movements axe modelled with an equation that is implemented within an additional subroutine and joined with the main solver. N carried out in the computational domain, in which one fin is fixed in a flow-through water duct. Simulations axe carded out in the range of the Re number up to 105. The results show significant influence of applied fin motion on the velocity distribution in the surrounding fluid.

关键词： biofluid dynamics fro-like movement fish propulsion computational fluid dynamics

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Colon Adenocarcinoma in a Retrograde Intussusception: A Case Report and Literature Review

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Open Journal of Gastroenterology 2024年第5期14卷 153-160页

作者： Carlos Hernández Brito Pedro Arredondo Ruiz Brenda Paola Sáenz Dávila Arsenio Torres delgado Luis Eduardo Méndez Turrubiates Luis Ángel Amezcua Toledo Omar Josué Herrera López Surgical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Clinical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico General and Laparoscopic Surgery Corporativo M&#233dico-Quir&#250rgico Torres Veracruz Mexico Radiation Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Radiology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Anatomical Pathology Department Centro Oncol&#243gico Onkolid Veracruz Mexico

Background: Intussusception is defined as a telescoping of a proximal gastrointestinal segment with its mesentery to a distal one, only 5% occur in adults and in colon the probability that it is caused by a malignant disease is up to 65%. Only 1% occurs in a retrograde manner, the rest occur in an anterograde manner. Aim: Describe the clinical presentation of an intussusception in the adult patient as well as its most frequent causes and possible complications that influence decision making for a definitive treatment. Case Presentation: A 66-year-old woman diagnosed with colon adenocarcinoma who underwent elective transverse colectomy and colonic anastomosis with an incidental finding of a transverse colon tumor in a retrograde intussusception was studied. Conclusion: In any adult patient with an intussusception especially in colon a neoplasia should be suspected and the affected segment should be resected without being reduced due to the risk of perforation and tumor dissemination.

关键词： Colon Cancer Colon Adenocarcinoma Colonic Intussusception Intussusception

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PET/MRI改善癌症患儿管理

中华核医学与分子影像杂志 2024年第2期44卷 124-128页

作者： lucia Baratto K.Elizabeth Hawk Lisa States Jing Qi Sergios Gatidis Louise Kiru Heike E.Daldrup-Link 陈素芸(译) 王辉(审校) Department of Radiology Stanford UniversityStanfordCalifornia Department of Radiology Children′s Hospital of PhiladelphiaPhiladelphiaPennsylvania Department of Radiology Children′s WisconsinMilwaukeeWisconsin Department of Diagnostic and Interventional Radiology University Hospital TübingenTübingenGermany Department of Pediatrics Stanford UniversityStanfordCalifornia 上海交通大学医学院附属新华医院核医学科上海200092

一体化PET/MRI通过一站式成像提供肿瘤解剖学及功能评估,且与^(18)F-FDG PET/CT相比其辐射暴露量减少80%,因此对癌症患儿的分期与再分期具有显著临床价值。该文回顾了^(18)F-FDG PET/MRI在小儿肿瘤中的临床应用,尤其关注PET/MRI在患儿... 详细信息

一体化PET/MRI通过一站式成像提供肿瘤解剖学及功能评估,且与^(18)F-FDG PET/CT相比其辐射暴露量减少80%,因此对癌症患儿的分期与再分期具有显著临床价值。该文回顾了^(18)F-FDG PET/MRI在小儿肿瘤中的临床应用,尤其关注PET/MRI在患儿管理中的价值。来自4个不同机构的PET/MRI应用先行者分享了他们对PET/MRI技术在癌症患儿评估中特殊优势的见解。文章作者讨论了全身PET/MRI在评估某些解剖区域(如软组织和骨髓)中的价值以及儿童特殊的PET/MRI影像学特征,并强调了全身PET/MRI如何通过在不失去诊断准确性的同时减少所需放射学检查次数(因此减少辐射暴露),改善淋巴瘤、肉瘤和神经纤维瘤病患儿的临床管理。文章论述了PET/MRI如何帮助区分恶性肿瘤与感染性或炎性疾病;另外,简要探讨了PET/MRI用于接受免疫治疗的患儿疗效评估以及对不同诊疗一体化药物评估的未来研究方向。从儿童应用中所获得的经验也可拓展至成人患者的评估中。

关键词：肿瘤学儿科学 PET/MRI 癌症儿科肿瘤学

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Optical magnetic field enhancement using ultrafast azimuthally polarized laser beams and tailored metallic nanoantennas

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Photonics Research 2024年第5期12卷 1078-1092页

作者： RODRIGO MARTIN-HERNANDEZ LORENZ GRUNEWALD LUIS SANCHEZ-TEJERINA LUIS PLAJA ENRIQUECONEJERO JARQUE CARLOS HERNANDEZ-garcia SEBASTIAN MAI Grupo de Investigacion en Aplicaciones del Laser y Fotonica Departamento de Fisica AplicadaUniversidad de SalamancaE-37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructuradas(LUMES) Universidad de SalamancaE-37008 SalamancaSpain Institute of Theoretical Chemistry Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Vienna Doctoral School in Chemistry(DoSChem) Faculty of ChemistryUniversity of Vienna1090 ViennaAustria Departamento de Electricidad y Electrónica Universidad de Valladolid47011 ValladolidSpain

*** *** thank Valentina Shumakova,Elizaveta Gangrskaia,Alessandra Bellissimo,Audrius Pugzlys,and Andrius Baltu?ka for fruitful discussions and computational support by the Vienna Scientific Cluster(VSC 4).The authors thankfully acknowledge the computer resources at MareNostrum and SCAYLE,and the technical support provided by Barcelona Supercomputing Center(RES-FI-2022-3-0041).R.M.-H.,L.S.-T.,L.P.,E.C.J.,and C.H.-*** funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation program(Grant Agreement No.851201)and support from Ministerio de Ciencia e Innovación(PID2022-142340NB-I00,PID2019-106910GB-I00).This research was funded in whole or in part by the Austrian Science Fund(FWF)(10.55776/ZK91).For open access purposes,the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission.

关键词： metallic polarized discussions

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Study of corneal biomechanical properties in patients with childhood glaucoma

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International Journal of Ophthalmology(English edition) 2020年第12期13卷 1922-1927页

作者： Sara garcia Caride lucia Perucho González Federico Sáenz Francés Julián García Feijoo Ophthalmology Clinico San Carlos HospitalProfesor Martín Lagos StreetMadridES 28040Spain

AIM:To study of corneal biomechanical properties and intraocular pressure(IOP)measured with Corvis Scheimpflug Technology(ST)in patients with childhood glaucoma(CG).METHODS:Cross-sectional study in which 89 eyes were included 56 of them with *** one eye per patient was *** following variables were obtained from the clinical history and the ophthalmological examination:age,sex,IOP,number of surgeries,and the cup/disc ratio(CDR).The following parameters were recorded using Corvis ST:corrected by biomechanics IOP(b IOP),not corrected IOP(nct IOP),central corneal thickness(CCT),maximum concavity[radius,peak distance(PD)and deformation amplitude],applanation 1 and 2(length and velocity).The mean age was 23±14.55 and 33±19.5 years old for the control group and CG group,*** 36 were males and 53 were *** the CG group,7 patients were controlled only with medical *** had at least one previous goniotomy,19 had at least one trabeculectomy,and 11 had an Ahmed ***:A significant and positive intraclass correlation coefficient was found between Goldman IOP and the IOP measured by Corvis in both *** differences were found between the IOP measured with Corvis and Goldman using a student *** biomechanical parameters,there were differences in the applanation length 2(A-L2),in the applanation velocity 2(A-V2)and in the *** sex,only the applanation length 1(A-L1)was found to be different in control group.A positive and significant Pearson correlation was found between CDR and the ***:Corneal biomechanical properties have shown differences between CG and healthy subjects and also between men and women.

关键词： childhood glaucoma biomechanical properties Corvis Scheimpflug Technology

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蓝莓不是蓝色的

中学生英语 2024年第27期 36-37页

作者： Erin garcia de Jesús 陈佳武汉市光谷五小

Roses are red and blueberries look *** the berry's color is not really *** fruit's waxy1coat just masquerades2as blue.玫瑰是红色的,蓝莓看起来是蓝色的。但蓝莓的颜色并不是真的。这种水果的蜡质外皮只是伪装成蓝色。A waxy covering coats some blue-colored fruits—such as blueberries,dark grapes and certain *** wax contains a host of tiny structures,each less th an a th ousandth the thickness of a piece of paper.

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COVID-19 pandemic,as experienced in the surgical service of a district hospital in Spain

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World Journal of Clinical Cases 2021年第23期9卷 6582-6590页

作者： Francisco Javier Pérez Lara Maria Belen Jimenez Martinez Francisco Pozo Muñoz Andres Fontalba Navas Rogelio garcia Cisneros Maria Jose garcia Larrosa Ignacio garcia delgado Maria del Mar Callejon Gil Department of Surgery Hopital de AntequeraAntequera 29200MálagaSpain North Malaga Healthcare District Hopital de AntequeraAntequera 29200MálagaSpain

The coronavirus disease 2019,which is caused by severe acute respiratory syndrome coronavirus 2,was first identified in December 2019 in Wuhan,China,and has since spread rapidly,evolving into a full-blown *** would like to report our experience after 1 year of this pandemic in the surgical service of a district hospital in *** have been many changes(including new protocols)that our service and the hospital have undergone,to adapt to the new *** believe that this experience can be useful for other professionals who have lived and are living a similar situation.

关键词： COVID-19 Hospital Experience Surgery Service Treatment

Human-Exoskeleton Joint Coordination Assessment:A Case Study on the Shoulder and Elbow Joints

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Journal of Bionic Engineering 2022年第6期19卷 1712-1721页

作者： Pablo delgado Clarissa Rincon Yimesker Yihun Mechanical Engineering Wichita State University1845 FairmountWichitaKS67260USA Biomedical Engineering Wichita State University1845 FairmountWichitaKS67260USA

This study is aimed at developing a methodology to assess and quantify the human limb motions and interactions with the exoskeleton in relation to *** different basic and common upper arm joint movements and their interaction with a joint-based exoskeleton are considered:shoulder vertical and horizontal abduction-adduction,and elbow *** exoskeleton and the human model are aligned to the respective joints inside a Musculoskeletal Modeling *** the range of motion,the linear and angular displacement errors were analyzed,and the effect of those errors on the length of the associated tendons was *** have shown a noticeable variation of the muscle-tendon lengths up to 65.7 mm and a change in the pattern on different muscle groups of the ***,about 4 mm muscle-tendon length changes observed particularly at the elbow anconeus *** changes of length could cause unwanted stresses at the joints,specially for people with disabilities due to stroke that might not have the flexibility to accommodate those extra pose variations imposed by the exoskeleton.

关键词： Exoskeleton Upper limb Rehabilitation Misalignment OpenSim Computational modeling Bioinspiration

A Systematic Literature Review on Task Allocation and Performance Management Techniques in Cloud Data Center

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Computer Systems Science & Engineering 2024年第3期48卷 571-608页

作者： Nidhika Chauhan Navneet Kaur Kamaljit Singh Saini Sahil Verma Abdulatif Alabdulatif Ruba Abu Khurma Maribel garcia-Arenas Pedro A.Castillo University Institute of Computing Chandigarh UniversityPunjab143001India Department of Computer Science and Engineering Chandigarh UniversityPunjab143001India Department of Computer Science and Engineering Uttaranchal UniversityUttarakhand248007India Department of Computer Science College of Computer Qassim UniversityBuraydah52571Saudi Arabia MEU Research Unit Faculty of Information TechnologyMiddle East UniversityAmman11831Jordan Department of Computer Engineering Automatics and RoboticsUniversity of GranadaGranada18071Spain Applied Science Research Center Applied Science Private UniversityAmman11931Jordan

As cloud computing usage grows,cloud data centers play an increasingly important *** maximize resource utilization,ensure service quality,and enhance system performance,it is crucial to allocate tasks and manage performance *** purpose of this study is to provide an extensive analysis of task allocation and performance management techniques employed in cloud data *** aim is to systematically categorize and organize previous research by identifying the cloud computing methodologies,categories,and gaps.A literature review was conducted,which included the analysis of 463 task allocations and 480 performance management *** review revealed three task allocation research topics and seven performance management *** allocation research areas are resource allocation,load-Balancing,and *** management includes monitoring and control,power and energy management,resource utilization optimization,quality of service management,fault management,virtual machine management,and network *** study proposes new techniques to enhance cloud computing work allocation and performance ***-comings in each approach can guide future *** research’s findings on cloud data center task allocation and performance management can assist academics,practitioners,and cloud service providers in optimizing their systems for dependability,cost-effectiveness,and *** methodologies can steer future research to fill gaps in the literature.

关键词： Cloud computing data centre task allocation performance management resource utilization