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Fluidization and Transport of Vibrated Granular Matter:A Review of Landmark and Recent Contributions

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Fluid Dynamics & Materials Processing 2024年第1期20卷 1-29页

作者： peter Watson Sebastien Vincent Bonnieu Marcello Lappa Department of Mechanical and Aerospace Engineering University of StrathclydeGlasgowUK European Space Agency European Space Research and Technology CentreNoordwijkNetherland

We present a short retrospective review of the existing literature about the dynamics of(dry)granular matter under the effect of *** main objective is the development of an integrated resource where vital information about past findings and recent discoveries is provided in a single *** attention is paid to those works where successful synthetic routes to as-yet unknown phenomena were *** landmark results are analyzed,while smoothly blending them with a history of the field and introducing possible categorizations of the prevalent *** no classification is perfect,and it is hard to distillate general properties out of specific observations or realizations,two possible ways to interpret the existing results are defined according to the type of forcing or the emerging(ensuing)regime of *** particular,first results concerning the case where vibrations and gravity are concurrent(vertical shaking)are examined,then the companion situation with vibrations perpendicular to gravity(horizontal shaking)is *** classes are introduced as follows:(1)Regimes where sand self-organizes leading to highly regular geometrical“pulsating”patterns(thin layer case);(2)Regimes where the material undergoes“fluidization”and develops an internal multicellular convective state(tick layers case);(3)Regimes where the free interface separating the sand from the overlying gas changes inclination or develops a kind a patterned configuration consisting of stable valleys and mountains or travelling waves;(4)Regimes where segregation is produced,i.e.,particles of a given size tend to be separated from the other grains(deep containers).Where possible,an analogy or parallelism is drawn with respect to the companion field of fluid-dynamics for which the assumption of“continuum”can be applied.

关键词： Granular materials vibrations fluidization flowability symmetry breaking

A computation design method for architectural artifacts adapted from traditional Kagome bamboo basketry techniques

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Frontiers of Architectural Research 2024年第2期13卷 249-264页

作者： Hiroyuki Shinohara Tung Hoi peter Chan School of Architecture The Chinese University of Hong KongHong KongChina

This study is a digital form-finding and manual fabrication experiment in woven architectural design,with one traditional weaving style,Kagome,used to scale the craft up into an architectural-scale bamboo woven *** is a trihexagonal pattern employed in traditional bamboo basketry as a triaxial weaving system,resulting in an object with a self-bracing capacity without the use of fasteners owing to its interlacing *** existing studies and tools have addressed triaxial weaving design and representation,the current consideration of the advantages of weaving with bamboo is *** address this research gap,this study develops a computational design method based on studies on bamboo *** allows for the representation and exploration of design geometries using combinations of regular triangular meshes for the fabrication of Kagome woven bamboo artifacts.A full-scale mock-up was fabricated to evaluate the effectiveness of the *** mock-up demonstrated the self-bracing properties of Kagome,but there were discrepancies between the mock-up and the *** affecting bamboo weaving on an architectural scale have been identified within this study to inform future research on woven bamboo structures.

关键词： Traditionalbamboo craft Triaxialmaterial interlacing Bamboo Computational design methods Mesh block combinationsystem Architecturalwoven artifact

PVR update:pathophysiology and clinical management

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International Journal of Ophthalmology(English edition) 2024年第9期17卷 1577-1580页

作者： peter Wiedemann Yan-Nian Hui Medical Faculty Leipzig UniversityLeipzig 04103Germany Department of Ophthalmology Eye Institute of Chinese PLAXijing HospitalFourth Military Medical UniversityXi’an 710032Shaanxi ProvinceChina

Wound-healing diseases present complex challenges,and proliferative vitreoretinopathy(PVR)has been a problem in the surgical retina for *** is a prolonged and abnormal healing response to retinal injury,such as primary retinal detachment(RD)or post-RD surgery,characterized by the formation of pre/subretinal membranes,retinal gliosis and shortening,retinal pigment epithelium cell(RPE)proliferation,and increased activity of glial cells(mainly Müller cells).

关键词： healing epithelium diseases

人前列腺癌组织中p53基因突变和p21表达缺失

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肿瘤防治杂志 2001年第4期8卷 370-371页

作者：叶定伟李慧 peter murphy 孙颖浩钱松溪郑家富马永江上海第二军医大学长海医院泌尿外科上海200433 上海第二军医大学长海医院内分泌科上海200433 美国Baylor College of Medicine

目的 :探讨人前列腺癌组织中p53基因的突变和p2 1WAF1/CIP1　　　蛋白表达的缺失。方法 :采用p53基因突变的PCR SSCP分析及DNA测序测定 2 0例患者前列腺癌标本 ,同时检测p2 1WAF1/CIP1　　　　蛋白的表达。结果 :在 2 0个前列腺癌标本中... 详细信息

目的 :探讨人前列腺癌组织中p53基因的突变和p2 1WAF1/CIP1　　　蛋白表达的缺失。方法 :采用p53基因突变的PCR SSCP分析及DNA测序测定 2 0例患者前列腺癌标本 ,同时检测p2 1WAF1/CIP1　　　　蛋白的表达。结果 :在 2 0个前列腺癌标本中 ,4例发现有p53基因的点突变 ( 2 0 % ) ,这 4例标本的前列腺癌细胞中均伴有p2 1WAF1/CIP1　　　　蛋白的表达缺失。结论 :人前列腺癌的发生和p53基因的突变有关 ,而这些p53基因异常可导致p2 1WAF1/CIP1　　　　蛋白的表达缺失。

关键词：突变前列腺癌 p53基因病理

Rehabilitation of Semi-Arid Grasslands through the Perennialization of Lots by Implementing Perennial Forage Exotic Grass

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Phyton-International Journal of Experimental Botany 2024年第8期93卷 2115-2125页

作者： Delfina Arancio Sidoti Juan Manuel Zeberio Guadalupe peter Universidad Nacional de Río Negro Sede AtlánticaCEANPaViedma8500Argentina Consejo Nacional de Investigaciones Científicas y Técnicas CONICETCABABuenos Aires1425Argentina Chacra Experimental Patagones Ministerio de Desarrollo Agrario de la Provincia de Buenos AiresCarmen de Patagones8504Argentina

Argentina is the country with the highest proportion of arid and semi-arid ecosystems in Latin *** the rangelands of Southwestern Buenos Aires(Patagones Department),there is a clear advancement of the agricultural frontier to the detriment of the native forest in this *** to rainfall variation and seed acquisition,Thinopyrum ponticum is cultivated as a forage perennial crop in this *** objective was to evaluate the performance of *** as a facilitating crop for the medium-term rehabilitation of natural grasslands in semi-arid *** working hypotheses were that:1)native perennial grass cover increases over the years and 2)diversity and specific richness of the vegetation are enhanced by the duration of Tall Wheatgrass *** were collected from commercial plots where *** was shown:recent implantation(5–8 years,RI);medium implantation(13–15 years,MI);and old implantation(20–22 years,OI).Thirty-four species were identified and classified into seven functional groups:Annual grasses,annual herbs,perennial herbs,exotic perennial herbs,perennial forage grasses,exotic perennial forage grasses,perennial forage exotic grasses,and nonforage perennial *** ponticum’s total cover was between RI and *** cover,species richness,and Shannon-Weaver diversity index showed no differences among *** forage grasses exhibited higher cover values in sites with greater implantation age and annual grasses showed the opposite *** results indicated that *** does not invade the sampled plots and enhances the colonization of the planted plots by perennial forage native ***,even though the herbaceous cover had been recovered,the woody layer which could provide environmental services and specific values for conservation was not.

关键词： Wheatgrass clearing vegetation monte Thinopyrum ponticum

Stable diffusion gradients in microfluidic conduits bounded by fluid walls

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Microsystems & Nanoengineering 2024年第3期10卷 357-367页

作者： Federico Nebuloni Cyril Deroy peter R.Cook Edmond J.Walsh Department of Engineering Science Osney Thermo-Fluids InstituteUniversity of OxfordOxford OX20ESUK Sir William Dunn School of Pathology University of OxfordOxford OX13REUK

Assays mimicking in vitro the concentration gradients triggering biological responses like those involved in fighting infections and blood clotting are essential for biomedical *** assays prove especially attractive as they allow precise control of gradient shape allied to a reduction in *** microfluidic devices are fabricated using solid plastics that prevent direct access to responding ***-walled microfluidics allows the manufacture of circuits on standard Petri dishes in seconds,coupled to simple operating methods;cell-culture medium sitting in a standard dish is confined to circuits by fluid walls made of an immiscible *** develop and experimentally validate an analytical model of diffusion between two or more aqueous streams flowing at different rates into a fluid-walled conduit with the cross-section of a circular *** solid walls,fluid walls morph during flows as pressures fall,with wall shape changing down the *** model is validated experimentally for Fourier numbers<0.1 using fluorescein diffusing between laminar *** enables a priori prediction of concentration gradients throughout a conduit,so allowing rapid circuit design as well as providing bioscientists with an accurate way of predicting local concentrations of bioactive molecules around responsive and nonresponsive cells.

关键词： walls diffusion attractive

Oral fluoroquinolones and the risk of Achilles tendon rupture

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Journal of Sport and Health Science 2024年第6期13卷 749-750页

作者： peter Vibe Rasmussen Jarl Emanuel Strange Anders Holt Department of Cardiology Herlev-Gentofte University HospitalCopenhagen 2730Denmark Department of Cardiology Bispebjerg-Frederiksberg University HospitalCopenhagen 2400Denmark Department of Cardiology Rigshospitalet University HospitalCopenhagen 2100Denmark

Dear editor,Fluoroquinolones(FQs)are a class of antibiotics used to treat bacterial infections,such as lower respiratory,gastrointestinal,and urinary tract *** to its broad-spectrum action and wide availability,it is ... 详细信息

关键词： prescribed spectrum action

Researching Forms of Shadow Education:Methodological Challenges and Complexities of Private Supplementary Tutoring in Myanmar

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ECNU Review of Education 2024年第1期7卷 89-110页

作者： peter Kamtungtuang Suante Mark Bray The University of Hong Kong East China Normal University&The University of Hong Kong

Purpose:The growing literature on private supplementary tutoring,widely known as shadow education,addresses multiple dimensions and ***,many studies inadequately capture the diversity and implications of different forms of *** paper examines these matters in Myanmar,highlighting complexities and ambiguities in descriptors and in the nature of ***/Approach/Methods:Using a mixed-methods design,this study was conducted in Mandalay Region and Chin *** data were obtained from interviews with I10 Grade II students,34 high school teachers,30 parents,29 private tutoring providers,and two private school ***:The article categorizes tutoring forms based on their styles and orientations,particularly lecture-type teaching and homework supervision by guides,class sizes,durations of fee-charging(e.g,annually),the number of subjects taught per tutor,and tutoring *** study brings the topic out of the shadows for clearer analysis of the phenomenon and thus for assessment of its ***:The study makes a methodological contribution to the wider picture by demonstrating the need for greater clarity and precision in the national and international comparative *** also underscores shortcomings of predetermined categories in questionnaires and the value of qualitative interviews.

关键词： Classification methodology Myanmar private tutoring shadow education

Pre-Cryogenian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 899-918页

作者： Peiyuan HU Qingguo ZHAI Guochun ZHAO peter A.CAWOOD Yue TANG Yiming LIU Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Sciences University of Hong KongPokfulam RoadHong Kong 999077China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China School of Earth Atmosphere&EnvironmentMonash UniversityMelbourneVIC 3800Australia

The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinents on *** paper systematically summarizes the characteristics of pre-Cryogenian sedimentation,paleontology,magmatism,and metamorphism in the Tibetan Plateau and its surrounding *** on existing data,the records of pre-Cryogenian sedimentation and paleontology are mainly concentrated in the Meso-Neoproterozoic,with relatively few records from the Paleoproterozoic or *** oldest geological record is the Hadean detrital zircons in the metamorphosed sedimentary rocks of the Himalaya and Qamdo areas(ca.4.0 Ga).The Tibetan Plateau and surrounding areas preserve records related to the formation and evolution of the Kenor supercraton,and the Columbia,Rodinia,and Gondwana ***-Cryogenian basements can be divided into three types:Tarim-,Yangtze-,and *** Tarim-type basement has a paleogeographic affinity with the northern margins of the Australian and Indian continents and lacks detrital zircon age peaks and magmatic-metamorphic records related to the Rodinia assembly(ca.1.3-0.9 Ga).The Yangtze-type basement records volcanic activity related to global cooling in the latest pre-Cryogenian period and contains Meso-Neoproterozoic stromatolite and micropaleoflora fossils,as well as magmaticmetamorphic records related to Rodinia assembly(ca.1.1-1.0 Ga).The Lhasa-type basement is characterized by Neoproterozoic rift-related sediment records(ca.900 Ma)and high-pressure metamorphic events(ca.650 Ma),with a prominent peak of detrital zircon ages of ca.1.2-1.1 *** is likely to have a paleogeographic affinity with the African continent.

关键词： Tibetan Plateau Pre-Cryogenian Sedimentation Fossils Paleogeographic evolution