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遥感学报 1997年第S1期1卷 33-38页

作者： J.Qi P.J.Pinter t.R.clarke B.A.Kimball M.S.Moran

用遥感技术进行植物评估可与光谱植被指数联系起来，如规一化差分植被指数ＮＤＶＩ。ＮＤＶＩ值的变化一般被认为是植被数量和密度的变化，但直接与植物生长状况有关的植物光谱特性也会导致光谱植被指数的变化。因此，低植被指数可能由... 详细信息

用遥感技术进行植物评估可与光谱植被指数联系起来，如规一化差分植被指数ＮＤＶＩ。ＮＤＶＩ值的变化一般被认为是植被数量和密度的变化，但直接与植物生长状况有关的植物光谱特性也会导致光谱植被指数的变化。因此，低植被指数可能由于低密度或肥料不足二者之一或共同造成。这会限制植被指数作为监测手段的使用。二向反射分布函数ＢＲＤＦ模型把植物密度和光学特性区别对待，因而它有助于植物状况的客观评估。在这项研究中，我们测量了两个冬小麦冠层多角度光谱反射：一个氮肥充足，一个贫乏。这些测量随后用于ＢＲＤＦ的反演，来估计光学特性和植物密度。结果表明，同时获得这两种参数是可行的。因此，用ＢＲＤＦ和多角度遥感测量手段进行氮肥养料有关的植物状况诊断分析是可能的。结果也显示出这种方法中如反演和计算时间所带来的一些局限性。

关键词： BRDF 反演 NDVI 植物状况诊断

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Adverse Wear in MOM Hip-Arthroplasty Related to the Production of Metal Fragments at Impingement Sites

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Open Journal of Orthopedics 2018年第10期8卷 381-412页

作者： t. K. Donaldson E. J. Smith A. Koutalos A. John J. Y. Lazennec I. C. clarke Empire Orthopedics Colton CA USA Department of Orthopaedics University of Bristol Bristol England Department of Orthopaedics University Hospital of Larissa Larissa Greece Department of Orthopaedics University of Cardiff and Vale NHS Trust Wales England Department of Orthopedic and trauma Surgery La Pitié-Salpêtrière Hospital University of Paris Paris France Department of Orthopaedics Loma Linda University Medical Center Loma Linda CA USA

Metal on metal (MOM) bearings were reintroduced as resurfacing arthroplasty (RA) for the younger, more active patient and were later incorporated into total hip arthroplasty (tHA). Early results were encouraging. However, recent publications identified adverse tissue responses to metal debris, such that the majority of MOM designs have been abandoned due to the increase in cobalt-chromium (CoCr) debris and associated metal ions. Reports of MOM tHA cited risks that included acetabular cups with high-inclination angles, i.e. “edge-loading”, and “trunnionosis”. Hip impingement was also a cited risk in one MOM study, with “type-IV” wear noted to be a sliding/impaction type of wear, characterized by deep scratches. Sliding/impaction wear mechanisms produced at impingement are not well represented in current MOM literature. therefore, our objective in this review was to consolidate evidence for impingement risks. We hypothesize that hip impingement and subluxation with metal-backed acetabular cups can trigger wear mechanisms that result in, 1) femoral-neck notching, 2) release of large metal particles, 3) production of uniquely large scratches, defined as “microgrooves” on heads and cups, 4) formation of “polar” and “basal” microgrooves precisely aligning with cup profiles during impingement, and 5) equatorial microgrooves relate to soft-tissue sites of impingement. Relevant risk scenarios were evaluated and included hip impingement in both sitting and standing postures, head subluxation, wear patterns defining in-vivo component positions, and evidence for circulating metal fragments. the study relied on mapping of wear patterns to deduce in-vivo positioning of devices and relied on surrogate femoral stems of the same brand to simulate neck-cup impingement. EOS imaging techniques were used to analyze functional-sitting and functional-standing postures and prove existence of hip impingement sites in patients. the study identified 8-risk scenarios for wear damage on MOM bea

关键词： Resurfacing Arthroplasty MOM

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不同抗旱性的春小麦品种的生长分析

麦类作物学报 1985年第4期 25-26页

作者： J.M.clarke t.Fredtownley-smith 杨竹平

在研究作物及其品种对环境条件的反应中,已广泛使用了生长分析,以鉴定生长在形成经济产量诸重要因素中的作用。在育种方案中,生长分析对鉴别植物重要发育阶段,或在特定环境中鉴别与高产有关的因素,可能是有用的。但是在过去的许多研究中... 详细信息

在研究作物及其品种对环境条件的反应中,已广泛使用了生长分析,以鉴定生长在形成经济产量诸重要因素中的作用。在育种方案中,生长分析对鉴别植物重要发育阶段,或在特定环境中鉴别与高产有关的因素,可能是有用的。但是在过去的许多研究中,对于这方面的结论很不一致。如 Simpson(1968)认为,小麦产量和旗叶节以上的光合组织的面积和

关键词：抗旱性干旱条件产量生长分析小麦基因型

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导电聚合物——来自IBM的最新评述

世界科学 1984年第10期 45-48页

作者： G.B.Street t.C.clarke 宋天平

1973年,Walatka,Labes和Perlstein发现聚合的（SN）x晶体是金属性的材料,而不是如先前确信的半导体。从此,又激起了导电聚合物复兴的热潮。1975年,当着发现（SN）x在低于0.3K表现出超导性时,化学家就尝试用各种合成路线来得到类似的化... 详细信息

1973年,Walatka,Labes和Perlstein发现聚合的（SN）x晶体是金属性的材料,而不是如先前确信的半导体。从此,又激起了导电聚合物复兴的热潮。1975年,当着发现（SN）x在低于0.3K表现出超导性时,化学家就尝试用各种合成路线来得到类似的化合物。遗憾地是,他们的努力没有赢得成功的结果,（SN）x仍然是仅有的本征金属性的合成聚合物。但到1977年发现了各种卤素,特别是Br2可以进入（SN）x晶格并引起它的室温电导率增加一个数量级,而不改变其超导转折点。同年晚些时候,

关键词：导电聚合物化学修饰电导率功能聚合物电性聚炔烃聚乙炔聚对苯撑 IBM

A t follicular helper cell origin for t regulatory type 1 cells

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Cellular & Molecular Immunology 2023年第5期20卷 489-511页

作者： Patricia Solé Jun Yamanouchi Josep Garnica Muhammad Myn Uddin Robert clarke Joel Moro Nahir Garabatos Shari thiessen Mireia Ortega Santiswarup Singha Debajyoti Mondal César Fandos Julio Saez-Rodriguez Yang Yang Pau Serra Pere Santamaria Institut D'investigacions Biomediques August Pi i Sunyer BarcelonaSpain Department of Microbiology Immunology and Infectious DiseasesSnyder Institute for Chronic DiseasesCumming School of MedicineUniversity of CalgaryCalgaryABCanada Institute of Computational Biomedicine Faculty of MedicineHeidelberg University HeidelbergGermany Department of Biochemistry and Molecular Biology Cumming School of MedicineUniversity of CalgaryCalgaryABCanada.

Chronic antigenic stimulation can trigger the differentiation of antigen-experienced CD4+t cells into t regulatory type 1(tR1)cells,a subset of interleukin-10-producing treg cells that do not express *** identities of the progenitor(s)and transcriptional regulators of this t-cell subset remain ***,we show that the peptide-major histocompatibility complex class Il(pMHCll)monospecific immunoregulatory t-cell pools that arise in vivo in different genetic backgrounds in response to pMHCll-coated nanoparticles(pMHCll-NPs)are invariably comprised of oligoclonal subpools of t follicular helper(tFH)and tR1 cells with a nearly identical clonotypic composition but different functional properties and transcription factor expression *** analyses of scRNAseq data and multidimensional mass cytometry revealed progressive downregulation and upregulation of tFH and tR1 markers,***,pMHCIl-NPs trigger cognate tR1 cell formation in tFH cell-transfused immunodeficient hosts,and t-cell-specific deletion of Bcl6 or Irf4 blunts both the tFH expansion and tR1 formation induced by *** contrast,deletion of Prdm1 selectively abrogates the tFH-to-tR1 ***6 and Prdm1 are also necessary for anti-CD3 mAbinduced tR1 ***,tFH cells can differentiate into tR1 cells in vivo,and BLIMP1 is a gatekeeper of this cellular reprogramming event.

关键词： t-regulatory type 1(tR1)cells autoimmunity t follicular helper(tFH)cells transdifferentiation nanomedicine

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高分化血管肉瘤伴发反应性血管内皮瘤病

世界核心医学期刊文摘（皮肤病学分册） 2006年第1期2卷 24-25页

作者： clarke L.E Julian K.G clarke J.t Ioffreda M.D 党倩丽 Department of Pathology Penn State/MS Hershey Medical Center Hershey PA 17033 United States.Dr

A 55-year-old white female with a complex medical history including mixed connective tissue disease and peripheral vascular disease developed a group of red-purple papules on her proximal medial thigh that was followed, five months later, by the development of a large violaceous patch. She reported a history of radiation to this site (for melanoma) during her childhood. She was admitted to the hospitalwith a presumptive diagnosis of cellulitis, but failed to respond to antibiotics. A biopsy was performed and demonstrated a well-differentiated angiosarcoma arising in conjunction with reactive angioendotheliomatosis. Excision of the lesionwas performed, and fifteen months of follow-up have shown no recurrence or metastasis.

关键词：血管内皮瘤病血管肉瘤混合结缔组织病黑色素瘤放射治疗红色丘疹末梢血管患者自述蜂窝组织炎

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Functional lumen imaging probe use in a high-volume practice:Practical and technical implications

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World Journal of Gastrointestinal Endoscopy 2024年第7期16卷 396-405页

作者： Yan Jiang Raul Vazquez-Reyes Afrin Kamal thomas Zikos George triadafilopoulos John O clarke Division of Gastroenterology and Hepatology Stanford University School of MedicineRedwoodCA 94063United States

BACKGROUND the functional lumen imaging probe(FLIP)is a Food and Drug Administration approved tool to aid the diagnosis and management of esophageal ***,widespread adoption of FLIP remains limited and its utility in highvolume practices remains *** to analyze large sample data on clinical use of FLIP and provide insight on several technical aspects when performing *** We conducted a retrospective comparative and descriptive analysis of FLIP procedures performed by a single provider at an academic medical *** was a total of 398 FLIP procedures *** medical records were reviewed and data regarding demographics and procedural details were *** tests,including chi-squared,t-test,and multivariable logistic and linear regression,were *** there was an increase in FLIP cases with each successive time period of 13 months(n=68,146,184,respectively)with notable rises specifically for indications of dysphagia and gastroesophageal reflux *** was a shift toward use of the longer FLIP balloon catheter for diagnostic purposes(overall 70.4%vs 29.6%,Ption with other diagnostics/interventions,such as dilation and wireless pH probe *** were nearly equally performed with anesthesia vs moderate sedation(51.4%anesthesia),with no major *** who had anesthesia were less likely to have recurrent antegrade contractions[odds ratio(OR)=0.4,95%CI:0.3-0.8]and were also more likely to have absent contractility(OR=2.4,95%CI:1.3-CONCLUSION FLIP cases have increased in our practice with expanding indications for its *** limited normative data,providers should be aware of several potential technical issues,including the possible impact of sedation choice when assessing esophageal motility patterns.

关键词： Gastroenterology Endoscopy Functional lumen imaging probe Esophagus Motility

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通信电路

通信电路

作者： K.K.·克拉克(K.K. clarke) D.t.·希斯(D.t. Hess)

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通信电路分析与设计

通信电路分析与设计