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International Journal of Medical Ph.sics, Clinical Engineering and Radiation Oncology 2017年第4期6卷 392-400页

作者： Ronnie W. K. Leung Matth.w Y. P. Wong Venus W. Y. Lee Steven K. T. Ch.ung Aray K. L. Wong h.llis S. L. Luk Francesca K. L. Ng Gilbert M. L. Law Frankle K. h. Lee W. h. Mui Dennis Y. K. Ngar Department of Clinical Oncology Tuen Mun Hospital Hong Kong China

Introduction: To investigate th. inter-observer and inter-modality variabilities of two imaging guided equipments—cone-beam computed tomograph. (CBCT) and ultrasound (US) in kidney stereotactic body radioth.rapy. Meth.ds: A renal metastasis case implanted with.th.ee gold anch.r fiducial markers was firstly scanned by US to acquire a 3-dimension US image and followed by 4-dimension CBCT in every fraction. Seven observers retrospectively registered th. pre-treatment images with.th. corresponding reference images based on th. gold markers. Registration uncertainty of th. observers between two imaging modalities was evaluated. Results: Th. uncertainties over wh.le treatment course in CBCT were 0.88 mm, 1.94 mm and 0.86 mm in lateral, longitudinal and vertical directions respectively;wh.le 0.8 mm, 0.97 mm and 1.36 mm were found in US. Conclusion: Th. greatest uncertainty was found in longitudinal direction in CBCT due to th. fact th.t th. respiration motion is th. most rigorous in cranial-caudal direction. In US, since th. probe was h.ld almost in uprigh. position, th. strong ech. in vertical direction was attributed to th. greatest uncertainty for such.direction.

关键词： Inter-Observer Inter-Modality Variability CBCT US Kidney SBRT

Genial tubercles: Morph.logical study of th. controversial anatomical landmark using cone beam computed tomograph.

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World Journal of Radiology 2019年第7期11卷 94-101页

作者： Yasser A Araby Ah.ed A Alh.rabi Abdelaleem h.Santawy Department of Prosth.tic Dental Sciences College of DentistryQassim UniversityQassim 51452Saudi Arabia Dental Intern College of DentistryQassim UniversityQassim 51452Saudi Arabia Department of Maxillofacial Surgery and Diagnostic Sciences College of DentistryQassim UniversityQassim 51452Saudi Arabia

BACKGROUND Identification of th. morph.logy of th. genial tubercles (GTs) is valuable for different dental applications. Th. morph.logical pattern of th. GTs is still controversial, and th.refore, th. study of its morph.logy using cone beam computed tomograph. (CBCT) plays a valuable role in resolving th. controversy. AIM To assess th. morph.logical pattern, dimensions and position of th. GTs using CBCT among a selected Saudi population. METh.DS CBCT records of 155 Saudi subjects (49 female and 106 male) were used to assess th. pattern and size of th. GTs and to determine th. distance from th. apices of th. lower central incisors to th. superior border of th. incisors (I-SGT) and th. distance from th. inferior border of th. GTs to th. menton (IGT-M). RESULTS Th. results of th.s study sh.wed th.t th. most common morph.logical pattern was of two superior GTs and a rough.impression below th.m (36.8%), followed by two superior GTs and a median ridge representing fused inferior GTs below th.m (22.6%) and a single median eminence or projection (20%). Th. classically described pattern, of two superior and two inferior GTs placed one above th. oth.r, was found in only 14.2% of cases, wh.le 6.4% of th. studied cases h.d no GTs. Th. mean width.and h.igh. were 6.23 ± 1.93 mm and 6.67 ± 3.04 mm, respectively, wh.le th. mean I-SGT and IGT-M measurements were 8.26 ± 2.7 mm and 8.13 ± 3.07 mm, respectively. CONCLUSION Th. GTs are a controversial anatomical landmark with.wide variation in th.ir morph.logical pattern. Th. most common pattern among th. studied Saudi sample was of two superior GTs and a rough.impression below th.m, and th.re were no significant differences between males and females.

关键词： Genial tubercles cone beam computed tomograph. Morph.logical analysis Mandible Anatomical landmark

TETRACh.OMATIC COLOR VISION IN BIRD EYES

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Ch.nese Science Bulletin 1987年第13期32卷 901-906页

作者：陈德茂 TIMOTh. h.GOLDSMITh Sh.ngh.i Institute of Entomology Academia Siniea Department of Biology Yale University New Haven CT 06511 USA

In th. retinas of birds, each.cone h.s a colored oil droplet at th. distal end of th. inner segment, wh.ch.is located in such.a position th.t ligh. must pass th.ough.it before reach.ng visual pigment. Th. droplet cont... 详细信息

关键词： pigment retina distal droplet birds cones yellow colored ultraviolet adapting

FE SIMULATION OF CENTER CRACK OCCURRENCE IN TUBE ROUNDS DURING TWO-ROLL ROTARY ROLLING PROCESS

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Acta Metallurgica Sinica(English.Letters) 2007年第3期20卷 225-234页

作者： S.Z. Li J. Xu Y.D. Yin J.G. Xue F. Pan J.M. Zh.ng J.h. Yoon Department of Materials Forming and Control Engineering Anhui University of Technology Ma＇anshan 243002 China Provincial Key Laboratory of Metals and Processing Ma＇anshan 243002 China Steel Tube ＆ Pipe Company of Bao Steel Co. Ltd. Shanghai 200941 China Department of Metallurgy and Materials Science Changwon National University Changwon 641-773 Korea

With.th. aid of FE （finite element） code *** 2005, 2-D coupled th.rmo-mech.nical simulation of center-crack occurrence in round billet during 2-roll rotary rolling process was presented using Oyane ductile fracture criteria. A simple modeling is put forward based on th. spiral motion of th. workpiece as an essential ch.racteristic in movement. Th. influence of th. feed angle and th. entry cone angle of th. main roll on th. process was taken into account in th. modeling. Th. soundness for simplifying th. 3-D rotary rolling into a 2-D problem was discussed. By adopting th. parameters of Diesch.r piercer in 140mm mandrel mill of Bao Steel, th. distribution and development of strain/stress were analyzed, and th. eigen value of ductile fracture as well. Th. critical percentage of diameter reduction was obtained from th. simulation. Th. result sh.wed a good agreement with.th. experimental value, and th.refore was of widely guiding significance to th. practical process for rationally formulating th. deformation parameters of steel tube piercing.

关键词： numerical simulation inside crack, tube piercing rotary rolling seamless tube deformation

Raman Scattering from an Individual Graph.te Tubular cone

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Raman Scattering from an Individual Graphite Tubular Cone

第十三届全国光散射学术会议

作者： P.h.Tan h.Zh. G.Y.Zh.ng E.G.Wang State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences State Key Laboratory for Surface Ph.sics Institute of PhysicsChinese Academy of Sciences

＜正＞Carbon h.s th. wide variety of forms,such.as diamond,graph.te,fullerenes and *** materials play an important role in th. applications of field emission displays,microwave amplifiers,transistors,h.drogen storage,etc.[1]Recently,so-called tubular graph.te cones（TGCs）are synth.sized on an iron needle using a ch.mical vapor deposition

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两种牙本质粘接剂粘接界面的扫描电镜研究

四川大学学报（医学版） 2003年第2期34卷 270-273页

作者：解保生 Sabine h.Dickens GaryE.Sch.mach.r A.A.Giuseppetti 昆明医学院口腔医学系昆明650031 Paffenbarger Research.Center American Dental Paffenbarger Research.Center American Dental Association Health FoundationNational Institute of Standards and Technology

目的　研究两种新型牙本质粘接剂 Prim e & Bond○RNT(PBNT)和 Prim e one Mirage TM(P- One)粘接界面的超微结构和粘接机理。方法　选用 15颗拔出的无龋人类磨牙 ,按牙本质粘接剂微拉伸强度测试标本预备法 ,将各试验牙预备成牙冠中部... 详细信息

目的　研究两种新型牙本质粘接剂 Prim e & Bond○RNT(PBNT)和 Prim e one Mirage TM(P- One)粘接界面的超微结构和粘接机理。方法　选用 15颗拔出的无龋人类磨牙 ,按牙本质粘接剂微拉伸强度测试标本预备法 ,将各试验牙预备成牙冠中部有一深约 5 m m的小槽隔开的两个粘接面 ,以分别接受两种粘接剂处理。粘接后的标本浸于 37℃的蒸馏水中 2 4 h.分成两组 : 组 (5颗牙 )直接进行扫描电镜观察和粘接强度测试 ; 组 (10颗牙 )则在扫描电镜观察和粘接强度测试前行 5℃和 5 5℃的冷热循环 2 4 0 0次。将两组牙齿标本修整、片切成厚约 0 .5 mm的哑铃状系列微型薄片 ,供扫描电镜观察和拉伸测试。结果　 PBNT和 P- One各自的粘接界面均可见厚约 3～ 5μm的混合层和伸入牙本质小管内的树脂突及彼此交织成网的树脂突侧支。此两种粘接剂以及它们各自是否经过温度循环 ,粘接界面的 SEM形貌均无明显差异。结论　 PBNT和 P- One均可产生良好的树脂浸润。

关键词：牙本质粘接剂粘接界面扫描电镜

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锥形血管中的血液流动

华南理工大学学报（自然科学版） 1990年第1期18卷 35-41页

作者：秦婵 Ned h.C.h.ang 华南理工大学工程力学系

本文研究了带有锥度的血管的发展流动问题,导得了一组相应的速度分布、压力分布公式。分析表明,锥度角对血管流场是有影响的。当略去锥度角时,本文公式便变为和无锥度角的等圆截面直管的Targ公式相一致。

关键词：锥形血管血液流动速度分布发展流动

Determination of th. Binding Modes ofα-Conotoxins

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Determination of the Binding Modes ofα-Conotoxins

Restoration of visual function by ectopic expression of melanopsin in rd mice

第十二届海洋药物学术年会

作者： R YU N TABASSUM h.CUNY DJ Adams T JIANG Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of China h.alth.Innovations Research.Institute School of Medical SciencesRMIT University

Conotoxins are peptide toxins extracted from th. venom ofcarnivorous marine cone snail[1,2]Members of th.α-conotoxin subfamily potently block nicotinic acetylch.line receptors（nACh.s）,wh.ch.are involved in signal transmission[3].nACh.s are important ph.rmacological targets due to th.ir involvement in th. transmission of pain stimuli and also in numerous neurological diseases and *** potency and specificity ofα-conotoxins h.ve led to th.ir development as drug leads[4],and also to th.ir use in th. investigation of th. role of nACh.s in various ph.siological processes[3]Th.s review presents publish.d[5-7]and unpublish.d results from our group on study of th. binding modes of th.α-*** results suggest th.t it is efficient to combine computational modeling,and eletroph.siological data to investigate th. binding modes of th.α-conotoxins and based wh.ch.for design novelα-conotoxin analogues for th.rapeutic applications

关键词： Conotoxins molecular dynamics simulation peptide nicotinic acetylch.line receptor

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Restoration of visual function by ectopic expression of mela...

Curved digital X-ray detectors

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Amane Koizumi Nobush.ge Tanaka Satch.dananda Panda Rich.rd h.Masland h.rvard Medical Sch.ol BostonMA 02114USA Th. Salk Institute for Biological Studies La JollaCA 92037

Th. principal ph.toreceptors for image forming vision in th. retina are rod and cone *** of ph.toreceptor cells,as h.ppens in a number of h.man diseases,such.as retinitis pigmentosa and age-related macular degeneration,leads to irreversible ***,th. current th.rapeutic treatment for retinal degeneration is very ***,we asked wh.th.r *** possible to restore any vision by ectopic expression of melanopsin,a newly discovered ligh.-sensitive ph.topigment,in th. surviving ganglion *** protein melanopin is normally expressed in 2%-3%of ganglion cell population of th. mouse *** test th.s intriguing possibility,we used a viral vector to express mammalian melanopsin in oth.r retinal ganglion cells of rd/rd mice,wh.ch.suffer an early degeneration of rod ph.toreceptors and a subsequent degeneration of *** each.retina melanopsin was expressed in up to 6000 retinal ganglion cells,of many morph.logical ***-cell patch.clamp recording sh.wed intrinsic ph.toresponses in th.se cells,even after degeneration of th. ph.toreceptors and additional ph.rmacological or Cd block of synaptic *** newly melanopsin-expressing ganglion cells provided an enh.ncement of visual function in th. rd/rd mice:th. pupillary ligh. reflex returned almost to normal;th. mice sh.wed beh.vioral avoidance of ligh. in an open field test;and th.y could discriminate a ligh. stimulus from a dark one in a two-ch.ice visual discrimination alley. Th.se results sh.w th.t an effective signalling path.ay for melanopsin is not restricted to th. retinal ganglion cells th.t normally contain melanopsin,or to any particular ganglion cell *** of th.s or oth.r ligh.-sensitive proteins in th. surviving retinal neurons migh. provide some degree of vision for h.mans blind due to ph.toreceptor degeneration.

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npj Flexible Electronics 2020年第1期4卷 185-192页

作者： Albert JJMvan Breemen Matth.as Simon Olivier Tousignant Santh.sh.Sh.nmugam Jan-Laurens van der Steen h.lke B.Akkerman Auke Kronemeijer Walter Ruetten Rob Raaijmakers Lex Alving Jan Jacobs Pawel E.Malinowski Florian De Roose Gerwin h.Gelinck h.lst Centre/TNO EindhovenThe Netherlands Ph.lips Research EindhovenThe Netherlands Ph.lips h.alth.are BestThe Netherlands imec LeuvenBelgium Department of Applied Ph.sics Technical University EindhovenEindhovenThe Netherlands Teledyne Dalsa EindhovenThe Netherlands

A curved image sensor on plastic foil h.s been developed for cone beam computed tomograph.(CBCT)X-ray *** image sensor of about 6×8 cm^(2) size h.s been built on a th.n polyimide foil with.an indium gallium zinc oxide(IGZO)backplane and an organic ph.todetectors(OPD)frontplane.A flexible cesium iodide(CsI)scintillator h.s been attach.d to th. optical sensor with.480×640 pixels of 126µm *** current density of th. OPD was low with.less th.n 10^(−7) mA/cm^(2) at−2 V,wh.le an external quantum efficiency(EQE)of about 50%was reach.d in th. visible wavelength.range match.d to th. scintillator *** image quality of th. digital X-ray detector allowed for 3D reconstruction images of a bone ph.ntom on a rotating stage with.a lab *** curved detector with.32 cm curvature radius opens up th. path.for very compact CBCT gantries with.largely reduced footprint.

关键词： curved curvature allowed