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Statistical analysis of physico-mechanical parameters of sandstones occurring in orogenic settings

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Journal of Mountain Science 2024年第4期21卷 1388-1402页

作者： PAPPALARDO Giovanna CARBONe Serafina MONACO Carmelo ZOCCO Giordana MINeO simone Dipartimento Di Scienze Biologiche Geologiche E AmbientaliUniversitàDegli Studi Di CataniaCorso Italia 5795129 CataniaItaly

In northeastern Sicily(Italy),sandstone rock masses widely crop out as cover deposits over crystalline terrains belonging to the orogenic *** being part of the same geological formation,these sandstones are characterized by highly different features in terms of texture and physico-mechanical *** poses a scientific question on the possibility of tracing these rocks to a single statistical model,which could be representative of their main engineering geological ***,it is worth investigating on the possible reasons of such differences,that should be searched either in the current geographical sandstone distribution or in the rock *** this study,sandstone samples were collected from different sites and were analyzed at both the hand and thin section *** sandstone types were recognized,characterized by a different ***,the laboratory characterization allowed estimating their main physico-mechanical and ultrasonic properties,such as porosity,density,mechanical strength,deformability,and ultrasonic *** rock mechanical strength proved linked to the rock compactness and to the presence of lithic fragments,while pores and a pseudo-matrix between grains represent weakening *** data were also statistically analyzed by grouping the specimens according to a geographical criterion,with respect to their sampling area,but no link was found between location and rock ***,with the aim of achieving mathematical laws that could be used to predict some rock properties from others,useful for practical purposes when dealing with such a high property variability,single and multiple regression analyses were carried *** show that the Uniaxial Compressive Strength,porosity,and P-wave velocity are the best predictors for a quick,indirect estimation of the main physico-mechanical *** methodological approach developed for this research can be taken as reference to study other world

关键词： Sandstone Laboratory test Uniaxial Compressive Strength Porosity Rocks

Final results of the first phase of the PROTO-SPHeRA experiment: obtainment of the full current stable screw pinch and first evidences of the jet + torus combined plasma configuration

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Plasma Science and Technology 2024年第2期26卷 31-43页

作者： Paolo MICOZZI Franco ALLADIO Alessandro MANCUSO Vincenzo ZANZA Gerarda APRUZZeSe Francesca BOMBARDA Luca BONCAGNI Paolo BURATTI Francesco FILIPPI Giuseppe GALATOLA TeKA Francesco GIAMMANCO edmondo GIOVANNOZZI Andrea GROSSO Matteo IAFRATI Alessandro LAMPASI Violeta LAZIC simone MAGAGNINO simone MANNORI Paolo MARSILI Valerio PIeRGOTTI Giuliano ROCCHI Alessandro SIBIO Benedetto TILIA Onofrio TUDISCO FSN Dipartimento Fusione e tecnologie per la Sicurezza Nucleare ENEA Agenzia Nazionale per Le Nuove Tecnologie Energia e lo Sviluppo Economico SostenibileFrascati(Rome)00044Italy IAPS Istituto di Astrofisica e Planetologia Spaziali INAF Istituto Nazionale di AstrofisicaRome O133Italy Physics Department University of Pisa Faculty of Natural Sciences Mathematics and PhysicsPisa 56127 Italy

In astrophysics, the boundary conditions for plasma phenomena are provided by nature and the astronomer faces the problem of understanding them from a variety of observations [Hester J J et al 1996 Astrophys. J. 456 225], on the other hand, in laboratory plasma experiments the electromagnetic boundary conditions become a major problem in the set-up of the machine that produces the plasma, an issue that has to be investigated step by step and to be modified and adapted with great patience, in particular in the case of an innovative plasma confinement experiment. The PROTO-SPHeRA machine [Alladio F et al 2006 Nucl. Fusion 46 S613] is a magnetic confinement experiment, that emulates in the laboratory the jet + torus plasma configurations often observed in astrophysics: an inner magnetized jet of plasma centered on the(approximate) axis of symmetry and surrounded by a magnetized plasma torus orthogonal to this jet. The PROTO-SPHeRA plasma is simply connected, i.e., no metal current conducting rod is linked to the plasma torus, while instead it is the inner magnetized plasma jet(in the following always called the plasma centerpost) that is linked to the torus. It is mandatory that no spurious plasma current path modifies the optimal shape of the plasma centerpost. Moreover, as the plasma torus is produced and sustained, in absence of any applied inductive electric field, by the inner plasma centerpost through magnetic reconnections [Taylor J B and Turner M F 1989 *** 29 219], it is required as well that spurious current paths do not surround the torus on its outboard, in order not to lower the efficiency of the magnetic reconnections that maintain the plasma torus at the expense of the plasma centerpost. Boundary conditions have been corrected,up to the point that the first sustainment in steady state has been achieved for the combined plasma.

关键词： laboratory plasmas magnetic confinement astrophysical plasmas

Geophysical evidence of large-scale silica-rich fluid flow above the continental subduction interface

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Science China earth Sciences 2024年第9期67卷 2796-2809页

作者： Yuantong MAO Liang ZHAO Marco G.MALUSA Stefano SOLARINO Silvia PONDReLLI Baolu SUN Coralie AUBeRT simone SALIMBeNI elena eVA Stéphane GUILLOT State Key Laboratory of Lithospheric and environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Department of earth and environmental Sciences University of Milano-BicoccaMilan 20126Italy Istituto Nazionale di Geofisica e Vulcanologia Osservatorio Nazionale TerremotiGenova 16145Italy Istituto Nazionale di Geofisica e Vulcanologia Sezione di BolognaBologna 40127Italy Université Grenoble Alpes Université Savoie Mont BlancCNRSIRDUGEISTerreGrenoble 38000France

Fluids in subduction zones can have major effects on subduction ***,geophysical constraints on the scale and impact of fluid flow during continental subduction are still *** we analyze the VP/VS ratios in the Western Alpine region,hosting one of the best-preserved fossil continental subduction zones worldwide,to investigate the impact of fluid flow during continental *** found a belt of high VP/VS ratios>1.9 on the upper-plate side of the subduction zone,consistent with a partially serpentinized upper-plate mantle,and a belt of unusually low VP/VS ratiose lower-plate side,at depths shallower than 30 *** propose that these low VP/VS ratios result from a widespread network of silica-rich veins,indicating past fluid flow along the continental subduction *** results suggest that past fluid flow may have reduced the effective stress along the subduction interface thus favoring continental subduction.

关键词： Western Alps Crustal structure Receiver function Vp/Vs ratio Silica enrichment

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Clinical-based phenotypes in children with pediatric post-COVID-19 condition

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World Journal of Pediatrics 2024年第7期20卷 682-691页

作者： Lieke C.e.Noij Jelle M.Blankestijn Coen R.Lap Marlies A.van Houten Giske Biesbroek Anke-Hilse Maitland-van der Zee Mahmoud I.Abdel-Aziz Johannes B.van Goudoever Mattijs W.Alsem Caroline L.H.Brackel Kim J.Oostrom simone Hashimoto Suzanne W.J.Terheggen-Lagro Department of Pediatric Pulmonology and Allergy Amsterdam UMCLocation AMCEmma Children’s HospitalAmsterdam University Medical CenterRoom G2-222Meibergdreef 91105AZAmsterdamThe Netherlands Department of Pulmonary Medicine Amsterdam UMCAmsterdamThe Netherlands Department of Pediatrics Spaarne GasthuisHoofddorpThe Netherlands Department of Pediatrics Emma Children’s HospitalAmsterdam University Medical CenterAmsterdamThe Netherlands Department of Rehabilitation Medicine Amsterdam Movement SciencesMeibergdreef 9AmsterdamThe Netherlands Department of Paediatric Pulmonology Department of PaediatricsTergooi MCHilversumThe Netherlands Department of Child and Adolescent Psychiatry and Psychosocial Care Amsterdam UMCAmsterdam Reproduction and DevelopmentAmsterdamThe Netherlands

Background Pediatric post coronavirus disease 2019(COVID-19)condition(PPCC)is a heterogeneous syndrome,which can significantly affect the daily lives of *** study aimed to identify clinically meaningful phenotypes in children with PPCC,to better characterize and treat this *** Participants were children with physician-diagnosed PPCC,referred to the academic hospital Amsterdam UMC in the Netherlands between November 2021 and March *** factors and information on post-COVID symptoms,comorbidities,and impact on daily life were *** clusters were identified using an unsupervised and unbiased approach for mixed data *** Analysis of 111 patients(aged 3–18 years)revealed three distinct clusters within *** 1(n=62,median age=15 years)predominantly consisted of girls(74.2%).These patients suffered relatively more from exercise intolerance,dyspnea,and smell *** 2(n=33,median age=13 years)contained patients with an even gender distribution(51.5%girls).They suffered from relatively more sleep problems,memory loss,gastrointestinal symptoms,and *** 3(n=16,median age=11 years)had a higher proportion of boys(75.0%),suffered relatively more from fever,had significantly fewer symptoms(median of 5 symptoms compared to 8 and 10 for clusters 1 and 2 respectively),and experienced a lower impact on daily *** This study identified three distinct clinical PPCC phenotypes,with variations in sex,age,symptom patterns,and impact on daily *** findings highlight the need for further research to understand the potentially diverse underlying mechanisms contributing to post-COVID symptoms in children.

关键词： Adolescents Clusters Long COVID Pediatric Phenotypes Post-COVID syndrome

Particle elasticity influences polymeric artificial antigen presenting cell effectiveness in vivo via CD8+T cell activation,macrophage uptake,and the protein corona

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Nano Research 2024年第10期17卷 9052-9064页

作者： Savannah e.est-Witte Sydney R.Shannon Dennis H.Gong Kaitlyn G.Calabresi Jawaun J.Harris Kaitlyn Storm edwin J.Yoo Ariel Isser Vivek P.Jani Natalie K.Livingston Mary O.Omotoso Kelly Rhodes elana Ben-Akiva Randall A.Meyer Zoe T.Hsieh simone Sidoli Stephany Y.Tzeng Jonathan P.Schneck Jordan J.Green Translational Tissue engineering Center Institute for NanobiotechnologyDepartment of Biomedical EngineeringJohns Hopkins School of Medicine400 N BroadwayBaltimoreMD 21231USA Institute for Cell engineering Department of PathologyJohns Hopkins School of Medicine733 N BroadwayBaltimoreMD 21205USA Department of Biochemistry Albert Einstein College of MedicineThe BronxNew York CityNY 10461USA

Adoptive cell therapy(ACT)is an immunotherapy strategy for cancer that has seen widespread clinical *** ACT,patient-derived lymphocytes are stimulated with the antigen of interest ex vivo,proliferated,then returned to the patient to initiate an antigen-specific antitumor *** effective,this process is resource-intensive and logistically impossible for many *** artificial antigen presenting cells(aAPCs)offer a potential“off-the-shelf”alternative to ex vivo *** particulate aAPCs perform well in vitro,they have had limited success in vivo due to poor bioavailability after *** to bioavailability include rapid clearance,unfavorable biodistribution,and inadequate interactions with CD8+T cells at sites of *** properties such as elasticity have been shown to vastly impact the bioavailability and particle-cell interactions,but this has yet to be investigated in the context of aAPCs for in vivo T-cell *** literature likewise indicates that biomaterial properties,especially elasticity,can modulate T-cell activation in *** the goal of creating a more biomimetic,next-generation particulate aAPC,we developed a poly(ethylene)glycol hydrogel particle platform with tunable elasticity to investigate the impact of elasticity on antigen-specific T cell activation for in vivo adoptive *** this knowledge,we were able to gain more precise control over in vivo T cell activation and investigate possible mechanisms including the effects of aAPC elasticity on T cell binding,macrophage uptake,and the protein corona.

关键词： adoptive cell therapy artificial antigen presenting cells particle drug delivery elasticity protein corona poly(ethylene glycol)

Dysfunction of the adhesion G protein-coupled receptor latrophilin 1(ADGRL1/LPHN1)increases the risk of obesity

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Signal Transduction and Targeted Therapy 2024年第5期9卷 2298-2311页

作者： Heba ZabriTorsten Schöneberg AndréNguyen Dietzsch Hadi Al-Hasani Joachim Altschmied Katharina Bottermann Jana Brendler Judith Haendeler Susanne Horn Isabell Kaczmarek Antje Körner Kerstin Krause Kathrin Landgraf Diana Le Duc Laura Lehmann Stefan Lehr Stephanie Pick Albert Ricken Rene Schnorr Angela Schulz Martina Strnadová Akhil Velluva Heba Zabri Torsten Schöneberg Doreen Thor simone Prömel Rudolf Schönheimer Institute of Biochemistry Medical FacultyLeipzig UniversityLeipzigGermany Institute for Clinical Biochemistry and Pathobiochemistry Medical FacultyGerman Diabetes CenterLeibniz Center for Diabetes Research at Heinrich Heine University DüsseldorfDüsseldorfGermany German Center for Diabetes Research(DZD e.V.) Munich-NeuherbergGermany Cardiovascular Degeneration Clinical Chemistry and Laboratory DiagnosticsMedical FacultyUniversity Hospital and Heinrich Heine University DüsseldorfDüsseldorfGermany Cardiovascular Research Institute(CARID) Medical FacultyUniversity Hospital and Heinrich Heine University DüsseldorfDüsseldorfGermany Institute of Pharmacology Medical FacultyUniversity Hospital and Heinrich Heine University DüsseldorfDüsseldorfGermany Institute of Anatomy Medical FacultyLeipzig UniversityLeipzigGermany Center for Pediatric Research Hospital for Children and AdolescentsMedical FacultyLeipzig UniversityLeipzigGermany Helmholtz Institute for Metabolic Obesity and Vascular Research(HI-MAG)of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany Department of endocrinology NephrologyRheumatologyLeipzig University Medical CenterLeipzigGermany Institute of Human Genetics Leipzig University Medical CenterLeipzigGermany Institute of Cell Biology Department of BiologyHeinrich Heine University DüsseldorfDüsseldorfGermany School of Medicine University of Global Health EquityKigaliRwanda

Obesity is one of the diseases with severe health consequences and rapidly increasing worldwide *** the complex network of food intake and energy balance regulation is an essential prerequisite for pharmacological intervention with obesity.G protein-coupled receptors(GPCRs)are among the main modulators of metabolism and energy ***,for instance,regulate appetite and satiety in certain hypothalamic neurons,as well as glucose and lipid metabolism and hormone secretion from *** in some GPCRs,such as the melanocortin receptor type 4(MC4R),have been associated with early-onset ***,we identified the adhesion GPCR latrophilin 1(ADGRL1/LPHN1)as a member of the regulating network governing food intake and the maintenance of energy *** of the highly conserved receptor in mice results in increased food consumption and severe obesity,accompanied by dysregulation of glucose ***,we identified a partially inactivating mutation in human ADGRL1/LPHN1 in a patient suffering from ***,we propose that LPHN1 dysfunction is a risk factor for obesity development.

关键词： obesity metabolism intake

大陆俯冲界面之上大规模硅富集流体的地球物理学证据

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中国科学：地球科学 2024年第9期54卷 2848-2863页

作者：毛元彤赵亮 Marco G.MALUSÀ Stefano SOLARINO Silvia PONDReLLI 孙宝璐 Coralie AUBeRT simone SALIMBeNI elena eVA Stéphane GUILLOT 中国科学院地质与地球物理研究所岩石圈演化与环境演变全国重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049 Department of earth and environmental Sciences University of Milano-BicoccaMilan 20126Italy Istituto Nazionale di Geofisica e Vulcanologia Osservatorio Nazionale TerremotiGenova 16145Italy Istituto Nazionale di Geofisica e Vulcanologia Sezione di BolognaBologna 40127Italy UniversitéGrenoble Alpes UniversitéSavoie Mont BlancCNRSIRDUGEISTerreGrenoble 38000France

俯冲带中的流体可能对俯冲过程产生重要影响.然而,关于大陆俯冲期间流体规模及其作用的地球物理约束仍然有限.西阿尔卑斯造山带是全球保存最完好的大陆俯冲带之一,为认识大陆俯冲过程中流体作用的影响提供了重要的参考.本文综合多种地... 详细信息

俯冲带中的流体可能对俯冲过程产生重要影响.然而,关于大陆俯冲期间流体规模及其作用的地球物理约束仍然有限.西阿尔卑斯造山带是全球保存最完好的大陆俯冲带之一,为认识大陆俯冲过程中流体作用的影响提供了重要的参考.本文综合多种地球物理方法分析了西阿尔卑斯造山带地区的V_(P)/V_(S)比值,发现在俯冲区的上盘侧存在高V_(P)/V_(S)(>1.9)带,与部分蛇纹岩化的上覆地幔楔位置一致;而在下盘侧存在异常低的V_(P)/V_(S)(<1.7)带,异常深度浅于30km.本文认为,观测到的低V_(P)/V_(S)比值异常是由地壳内广泛分布的富硅岩脉导致,指示了在俯冲时期大陆俯冲界面之上可能存在的富硅流体流动.本文的结果暗示俯冲时期的流体流动可能降低了俯冲界面的有效应力,从而促进了大陆俯冲.

关键词：西阿尔卑斯造山带地壳精细结构接收函数 V_(P)/V_(S)波速比硅富集

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Measurements of Non-reacting and Reacting Flow Fields of a Liquid Swirl Flame Burner

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Chinese Journal of Mechanical engineering 2015年第2期28卷 394-401页

作者： CHONG Cheng Tung HOCHGReB simone Faculty of Mechanical engineering Universiti Teknologi Malaysia Department of engineering University of Cambridge

The understanding of the liquid fuel spray and flow field characteristics inside a combustor is crucial for designing a fuel efficient and low emission *** of the flow field of a model gas turbine liquid swirl burner is performed by using a2-D particle imaging velocimetry（PIV）*** flow field pattern of an axial flow burner with a fixed swirl intensity is compared under confined and unconfined conditions,i.e.,with and without the combustor *** effect of temperature on the main swirling air flow is investigated under open and non-reacting *** result shows that axial and radial velocities increase as a result of decreased flow density and increased flow *** flow field of the main swirling flow with liquid fuel spray injection is compared to non-spray swirling *** of liquid fuel spray changes the swirl air flow field at the burner outlet,where the radial velocity components increase for both open and confined *** reacting condition,the enclosure generates a corner recirculation zone that intensifies the strength of radial *** reverse flow and corner recirculation zone assists in stabilizing the flame by preheating the *** flow field data can be used as validation target for swirl combustion modelling.

关键词： flow field swirl flame gas turbine burner particle imaging velocimetry(PIV)

egocentric social network correlates of physical activity

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Journal of Sport and Health Science 2020年第4期9卷 339-344页

作者： Sonja Motteli simone Dohle Department of Health Sciences and Technology(D-HeST) ETH Z€urichZ€urich 8092Switzerland Department of Psychology University of CologneCologne 08215Germany

Background:The social environment might play an important role in explaining people’s physical activity(PA)***,little is known regarding whether personal networks differ between physically active and physically inactive *** study aimed to examine the relationship between personal network characteristics and adults’physical(in)***:An egocentric social network study was conducted in a random sample in Switzerland(n=529,mean age of 53 years,54%females).Individual and personal network measures were compared between regular exercisers and *** extent of these factors’association with PA levels was also ***:Non-exercisers(n=183)had 70%non-exercising individuals in their personal networks,indicating homogeneity,whereas regular exercisers(n=346)had 57%regularly exercising individuals in their networks,meaning more heterogeneous personal ***,having more regular exercisers in personal networks was associated with higher PA levels,over and above individual *** with an entirely active personal network reported,on average,1 day of PA more per week than respondents who had a completely inactive personal *** personal network characteristics,such as network size or gender composition,were not associated with ***:Non-exercisers seem to be clustered in inactive networks that provide fewer opportunities and resources,as well as less social support,for *** effectively promote PA,both individuals and personal networks need to be addressed,particularly the networks of inactive people(e.g.,by promoting group activities).

关键词： egocentric network exercise Inactivity Personal network Physical activity Questionnaire Similarity/homogeneity