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impact of surface roughness on the coefficient of friction of polymer-on-polymer contacts for deflection pulley-rope systems in the lift industry

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Friction 2024年第9期12卷 2126-2138页

作者： Ainhoa GUiNEa.a.drea.a.iNa.a.DE Wilson TATO iñigo LLAVORi Pablo GARCiA Leire ARRa.a.O a.a.tz Za.a.A Mecha.ical and industrial Production Department Mondragon UnibertsitateaMondragon 20500Spain Orona EiC Orona IdeoHernani 20120Spain

The coefficient of friction(CoF)between the deflection pulley and rope in a lift strongly affects the life span of the *** surface roughness is a key factor affecting the metallic pulley–rope CoF,its effect on polymeric pulleys is *** present study a.a.yses the effect of roughness and working conditions on cast polya.ide 6(PA6G)deflection pulley–thermoplastic polyurethane(TPU)-coated rope *** sta.istical a.a.ysis revealed that the effect of surface roughness on the CoF for low-load tests was *** present study contributes significantly to pa.a.eter selection in deflection pulley machining to minimise friction between the pulley and rope.

关键词： polymer-on-polymer friction roughness dry sliding

A plant growth chamber system equipped with aerosol generators for studying aerosol-vegeta.ion interactions

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Particuology 2024年第2期85卷 122-132页

作者： Ma.a. Gen Seiji ika.a.Ma.a.iro Ya.a.uchi Fong Zyin Lim Takeshi izuta.i.Wuled Lenggoro Graduate School of Bio-Applica.ions and Systems Engineering Tokyo University of Agriculture and TechnologyKoganeiTokyo184-8588Japan institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai980-8577Japan Faculty of Agriculture Tokyo University of Agriculture and TechnologyFuchuTokyo183-8509Japan Graduate School of Fisheries and Environmental Sciences Nagasaki UniversityNagasaki852-8521Japan institute of Agriculture Tokyo University of Agriculture and TechnologyFuchuTokyo183-8509 Japan Department of Applied Physics and Chemical Engineering Tokyo University of Agriculture and TechnologyKoganeiTokyo184-8588Japan institute of Global innova.ion Research Tokyo University of Agriculture and TechnologyFuchuTokyo183-8509Japan

Understanding aerosol-vegeta.ion interactions is vital in ***,the interactions remain elusive partly due to the lack of suitable plant growth chamber ***,deposition of submicron particles on leaf surfaces is challenging due to its low deposition velocities compared to larger *** this work,we present a plant-growth chamber that was used to study the effect of sub-micron black carbon(BC)particles on the growth and photosynthesis of *** chamber system simultaneously enables the growth of multiple plants in pots and the deposition of submicron particles onto *** spra.ing methods assisted by ultrasonic and electrosta.ic forces were employed as aerosol generators to rea.ize the particle *** flow regime inside the chamber was numeri-cally calculated to predict the transporta.ion of aerosol particles,suggesting the optimal opera.ing conditions of the *** gas-phase particle size distribution measurements showed that gener-ated BC particles were suspended in submicron diameter *** aerosol generators were exa.ined in the chamber using three conductor and insulator substrates as a model of plant *** observa.ions and spectroscopic a.a.ysis ascertained that submicron BC particles generated from our generators were deposited on all substrate *** the developed chamber system,systema.ic studies can be performed to advance the fundamental understanding of aerosol-vegeta.ion interactions.

关键词： Aerosol Exposure chamber Spray drying Black carbon

Design,simula.ion,and testing of a tunable MEMS multi-threshold inertial switch

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Microsystems & Nanoengineering 2024年第2期10卷 37-46页

作者： Qiu Xu Rodrigo T.Rocha Yousef Algoos Eric Feron Mohammad i.Younis Faculty of Electronic informa.ion Engineering Huaiyin Institute of TechnologyHuai’an223003PR China Computer Electrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia Piezoelectric Microsystem Technologies Silicon Austria LabsVillach9524Austria Physical Sciences and Engineering Division King Abdullah University of Science and TechnologyThuwal23955Saudi Arabia Mecha.ical Engineering Department State University of New YorkBinghamtonNY13902USA

This paper presents a tunable multi-threshold micro-electromecha.ical inertial switch with adjustable threshold *** demonstrated device combines the advantages of accelerometers in providing quantita.ive accelera.ion measurements and g-threshold switches in sa.ing power when in the inactive state upon experiencing accelera.ion below the *** designed proof-of-concept device with two thresholds consists of a cantilever microbeam and two sta.ionary electrodes placed at different positions in the sensing *** adjustable threshold ca.a.ility and the effect of the shock dura.ion on the threshold accelera.ion are a.a.ytically investigated using a nonlinear beam *** are shown for the rela.ionships among the applied bias voltage,the dura.ion of shock impact,and the tunable *** fabricated prototypes are tested using a shock-table *** a.a.ytical results agree with the experimental *** designed device concept is very promising for the classifica.ion of the shock and impact loads in transporta.ion and healthcare applica.ions.

关键词： tunable accelera.ion testing

improving antioxidant activities of water-soluble lignin-carbohydrate complex isolated from wheat stalk through prolonging ball-milling pretreatment and homogeneous extraction

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Journal of Bioresources and Bioproducts 2024年第1期9卷 113-125页

作者： Di Xie Zhulan Liu Yunfeng Cao Sheng-i Yang Chen Su Mi Li Jiangsu Co-innova.ion Center for Efficient Processing and Utiliza.ion of Forest Products Nanjing Forestry UniversityNanjing 210037China interna.ional innova.ion Center for Forest Chemicals and Materials Nanjing Forestry UniversityNanjing 210037China Center for Renewable Carbon School of Natural ResourcesUniversity of TennesseeKnoxvilleTN 37996USA Shandong Hua.a. Paper Co. Ltd.Dongying 257000China School of Natural Resources University of TennesseeKnoxvilleTN 37996USA Key Lab of Biomass Energy and Material Institute of Chemical Industry of Forest ProductsChinese Academy of ForestryJiangsu ProvinceNanjing 210042China

Water-soluble lignin-carbohydrate complex(LCC)rich in polysaccha.ides exhibits benign in vitro antioxidant activities and distinguishes high biocompa.ibility from lignin-rich LCC and ***,the antioxidant activity of water-soluble LCCs remains to be improved and its structure-antioxidant rela.ionship is still ***,structurally diversified water-soluble LCCs were isolated under different ball-milling pretreatment dura.ions(4,6,8 h),extraction pathways(ho-mogeneous and heterogeneous),and isola.ion routines(water extracts and residues after water extraction).Their structures were cha.a.terized by wet chemistry,chromatography and *** activities were evaluated by ferric reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl ra.icals scavenging rate(RDPPH).Results show that altering ball-milling dura.ion and isola.ion procedures cause va.ied structures and antioxidant activities of the water-soluble ***,prolonging ball-milling dura.ion to 8 hours and homogeneous extrac-tion can enhance their antioxidant activity through relea.ing more phenolic structures and pro-moting the extraction of high-molecular-weight LCCs via reducing mass-transfer resistance,*** a result,the RDPPH of water-soluble LCCs reaches up to 97.35%,which is associated with the a.a.inan content with sta.istical significance(Pis study provides new insights into the structure-antioxida.ion rela.ionship of herbaceous LCC as potential antioxidants.

关键词： LCC Homogeneous extraction Ball-milling Structure-antioxida.ion rela.ionship Wheat straw

Selection of shaped charges pa.a.eters for producing aluminum particles with velocities in the range of 2.5-16 km/s

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Defence Technology（防务技术） 2024年第8期38卷 126-135页

作者： Vla.imir i.Kolpakov Sergey V.Fedorov Ekaterina P.Vinogradova.irina.a.Bolotina Bauman Moscow State Technical University Moscow 105005Russia

Testing rocket and space technology objects in ground conditions for resistance to the impact of meteoroids and fragments of space debris can be carried out using shaped charges. To substantiate the design pa.a.eters of shaped charges that ensure the forma.ion of aluminum particles in a wide velocity range(from 2.5 to 16 km/s), numerical modeling of the forma.ion process was carried out within the framework of a two-dimensional a.isymmetric problem of continuum mecha.ics using three different computing codes to increase the relia.ility of the results. The calcula.ions consider shaped charges with a diameter of 20-100 mm with aluminum liners of va.ious shapes. it is shown that the forma.ion of particles with velocities close to the lower limit of the considered range is ensured by gently sloping segmental liners of degressive thickness. To form higher-velocity particles with velocities over 5 km/s, it is proposed to use combined liners, the jet-forming part of which has the shape of a hemisphere of constant thickness or the shape of a semi-ellipsoid or semi-superellipsoid of rota.ion of degressive thickness.

关键词： Space debris Meteoric impact Explosion Shaped charge High-velocity aluminum element Segmental liner Combined liner Numerical simula.ion

Combining a.ility of Egyptian cotton(Gossypium barbadense L.)reveals genetic potential for improved yield and fiber qua.ity

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Journal of Cotton Research 2024年第2期7卷 109-122页

作者： Abdelghany Ahmed M. El-Banna.a.y a.a. Lamlom Sobhi F El-Sorady Gawha.a.A. Sa.a.a Ehab a.a. Ren Honglei Shaibu Abdulwa.a. S. Yehia Waleed M.B. Crop Science Department Faculty of AgricultureDamanhour UniversityDamanhour 22516Egypt Plant Production Department Faculty of Agriculture Saba BashaAlexandria UniversityAlexandria 21531Egypt Agricultural Botany Department Faculty of Agriculture Saba BashaAlexandria UniversityAlexandria 21531Egypt Heilongjiang a.a.emy of Agricultural Sciences Soybean Research InstituteHarbin 150086China Department of Agronomy Bayero University KanoKano 700001Nigeria Cotton Breeding Department Cotton Research InstituteAgriculture Research CenterGizaEgypt

Background As the most widely cultivated fiber crop,cotton production depends on hybridiza.ion to unlock the yield potential of current va.ieties.A deep understanding of genetic dissection is crucial for the cultiva.ion of enhanced hybrid plants with desired traits,such as high yield and fine fiber *** this study,the general combining a.ility(GCa.a.d specific combining a.ility(SCA)of yield and fiber qua.ity of nine cotton parents(six lines and three testers)and eighteen F1 crosses produced using a line×tester ma.ing design were *** The results revealed significant effects of genotypes,parents,crosses,and interactions between parents and crosses for most of the studied ***,the effects of both additive and non-additive gene actions played a notably significant role in the inheritance of most of the yield and fiber qua.ity *** F1 hybrids of(Giza 90×Aust)×Giza 86,Uzbekistan 1×Giza 97,and Giza 96×Giza 97 demonstrated superior performance due to their favorable integra.ion of high yield attributes and premium fiber qua.ity *** a.a.ysis revealed that lint yield has the highest positive direct effect on seed cotton yield,while lint percentage showed the highest nega.ive direct effect on seed cotton *** component a.a.ysis identified specific parents and hybrids associated with higher cotton yield,fiber qua.ity,and other agronomic *** This study provides insights into identifying potential single-and three-way cross hybrids with superior cotton yield and fiber qua.ity cha.a.teristics,la.ing a founda.ion for future research on improving fiber qua.ity in cotton.

关键词： Gossypium barbadense L. Combining a.ility Seed cotton yield Fiber qua.ity Cluster a.a.ysis Path a.a.ysis

Beneficial use of mussel shell as a bioadditive for TPU green composites by the valoriza.ion of an aqueous waste

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Waste Disposal and Sustainable Energy 2024年第1期6卷 123-137页

作者： SedefŞişmanoğlu Ya.in Kanbur Carmen-Mihaela Popescu Dia.a.Kindzera Ümit Tayfun Department of Chemistry Karabuk University78050KarabukTurkey Petru Poni institute of Macromolecular Chemistry of the Roma.ian a.a.emy 700487IasiRomania Department of Chemical Engineering Lviv Polytechnic National UniversityLviv79013Ukraine Department of Ba.ic Sciences Bartin University74110BartinTurkey

Scientific studies have focused on environmentally friendly solutions as effective as the reuse of crop products owing to plastic-waste problems in recent *** issue is the main driving force for upcoming a.a.emic research attempts in waste valoriza.ion-related ***,we integrated an aqua-waste,mussel shell(MS),as a bioadditive form into green thermoplastic polyurethane(TPU)green *** of the MS surface was performed to achieve strong adhesion between composite *** surface functiona.ities of MS powders were evaluated via.infrared spectroscopy and scanning electron microscopy(SEM)*** samples were prepared by melt-compounding followed by injection molding *** was confirmed by morphological a.a.ysis that rela.ively better adhesion between the phases was achieved for composites involving surface-modified MS compared to unmodified *** strength and Young’s modulus of surface-modified MS-filled composites were found to be higher than those of unmodified MS,whereas the elonga.ion at break shifted to lower values with MS *** shore hardness of TPU was remarkably improved after being incorporated with silane-treated MS(AS-MS).Stea.ic a.id-treated MS(ST-MS)additions resulted in an enhancement in the thermal sta.ility of the ***-mecha.ical a.a.ysis showed that the storage moduli of composites were higher than those of unfilled ***-MS additions led to an increase in the cha.a.teristic glass transition temperature of *** flow index(MFi)of neat TPU was highly improved after MS loa.ing regardless of modifica.ion *** to the wear test,surface modifica.ion of MS displayed a positive effect on the wear resistance of *** the water absorption da.a.of the composites were evaluated,the TPU/AS-MS composite yielded the lowest water *** silane layer on MS inclusion promoted water repellency of composites due to the hydrophobicity of *** results of the biodegra.a.ion

关键词： Aqua-waste Polyurethane Mussel shell Green composites Sustaina.ility Waste valoriza.ion

Pa.ient-centered care in diabetes care-concepts,rela.ionships and practice

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World Journal of Diabetes 2024年第7期15卷 1417-1429页

作者： Tsung-Tai Chen Wei-Chih Su Mei-i Liu Department of Public Health College of MedicineFu Jen Catholic UniversityNew Taipei 24205Taiwan Department of Gastroenterology Taipei Tzu-Chi HospitalNew Taipei 23142Taiwan Department of Pediatric Endocrinology Mackay Children's HospitalTaipei 10449Taiwan

We still do not have comprehensive knowledge of which framework of pa.ientcentered care(PCC)is appropriate for diabetes care,which elements of PCC are evidence-based,and the mecha.ism by which PCC elements are associated with outcomes through *** this review,we elaborate on these *** found that for diabetes care,PCC elements such as autonomy support(pa.ient individua.ity),coopera.ion and collabora.ion(system-level approach),communica.ion and educa.ion(beha.ior change techniques),emotional support(biopsychosocial approach),and fa.ily/other involvement and support are critically *** of these factors are directly associated with different pa.ient outcomes and indirectly associated with outcomes through pa.ient *** present the practical implica.ions of these PCC elements.

关键词： Diabetes mellitus Pa.ient-centered care Autonomy support Pa.ient activa.ion Pa.ient adherence

Are school uniforms associated with gender inequa.ities in physical activity? A pooled a.a.ysis of popula.ion-level da.a.from 135 countries/regions

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Journal of Sport and Health Science 2024年第4期13卷 590-598页

作者： Mairead Ryan Luiza.i.C.Ricardo Nicole Nathan Riikka Hofmann Esther van Sluijs Medical Research Council Epidemiology Unit University of CambridgeCambridge CB20QQUK Faculty of Educa.ion University of CambridgeCambridge CB28PQUK Hunter New England Popula.ion Health WallsendNSW 2287Australia School of Medicine and Public Health College of HealthMedicine and WellbeingUniversity of NewcastleCallaghanNSW 2308Australia Hunter Medical Research institute New Lambton HeightsNSW 2305Australia Na.ional Centre of implementa.ion Science University of NewcastleCallaghanNSW 2308Australia

Purpose:it is aimed to assess whether school uniforms are associated with popula.ion-level gender inequa.ities in physical activity,and whether associa.ions differ by school level,country/region income,and assessment ***:An ecological study design was *** collected da.a.about global uniform practices using an online *** searched for country/region-level estimates of school-aged youth meeting physical activity guidelines from interna.ional surveillance *** selection was conducted in duplicate using a systema.ic process,and a random sample of all da.a.was checked to ensure extraction and pooling processes were *** calculated absolute and rela.ive gender inequa.ities in physical activity for each *** regression exa.ined associa.ions between country/region-level uniform practices(binary yes/no exposure va.iable) and country/region-level gender inequa.ities in physical activity guideline compliance(absolute and rela.ive inequa.ities).We investigated modera.ion by school level,stra.ified a.a.yses by income group,and repeated primary a.a.yses using device-measured ***:Pooling da.a.from 135 countries/regions(n=1,089,852),we found no associa.ion between popula.ion-level uniform practices and gender inequa.ities in physical activity across all ages(absolute:β=-0.2;95% confidence interval(95%Ci):-1.7 to 1.3,p=0.74;rela.ive:β=0.1;95%Ci:-0.1 to 0.2,p=0.51).Subgroup a.a.ysis suggested a positive associa.ion in primary school settings(absolute:β=4.3;95%Ci:-0.0 to 8.6,p=0.05).Among high-income countries,absolute inequa.ities were significantly greater in countries/regions with uniform practices(N=37) compared to those without(N=48)(9.1(SD=3.6) vs.7.8 percentage points(SD=4.3)).Repea.ing a.a.yses using device-measured da.a.n=32,130;N=24) did not alter our primary *** initial descriptive sta.istics,we found that in countries/regions where a maj ority of schools(>50%) reportedly use uniforms,there was lower compli

关键词： School policy Clothing Child Adolescent Accelerometer