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Influence of curing.conditions on the shrinkag. behavior of three-dimensional printed concrete formwork

Frontiers of Structural and Civil Eng.neering 2024年第8期18卷 1225-1236页

作者： M.BEKAERT K.van TITTELBOOM g.de SCHUTTER Mag.el-Vandepitte Laboratory for structural Eng.neering.and Building.Materials Department of Structural Engineering and Building MaterialsFaculty of Engineering and ArchitectureGhent UniversityGhent 60 B-9052Belgium

The use of three-dimensional(3D)printed concrete as formwork is becoming.more widely applied within the ***,the technolog. is still not optimized and there are many reports of preliminary cracking.during.the curing.of cast *** is believed to result from differential shrinkag. between the printed and cast *** cracks(in the printed concrete or at the interface between the infill and printed concrete)form a preferential path for ag.ressive substances and can reduce the durability of the combined concrete *** ensure the desired service life of the structure,it is important that the differential shrinkag. between cast and printed concrete is *** study investig.ted the effect of curing.conditions on the differential shrinkag. behavior of 3D and cast *** influence of prewetting.of the dry-cured 3D printed formwork was also *** the experimental prog.am,a vibrated and self-compacting.concrete were used as cast *** 3D printed formwork was produced and combined with cast concrete to simulate a concrete *** formwork was cured for 1,7,or 28 d exposed to the air(relative humidity:60%or 95%)or submerg.d in *** leng.h chang. of the combined elements was observed over 56 d after concrete casting.and throug.out the thickness of the *** show that increasing.the curing.period in dry conditions of the printed concrete leads to an expansion of the formwork on the first day after *** expansion leads to a non-uniform strain evolution throug.out the curing.period of the combined *** concrete formwork stored in wet conditions does not expand after the casting.process but tends to show a decreasing.linear deformation within the whole elements.

关键词： 3D concrete printing formwork shrinkag. curing

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Targ.ting.epidermal g.owth factor receptor sig.aling.to facilitate cortical injury repair?

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Neural Reg.neration Research 2024年第5期19卷 935-936页

作者： Ricardo g.mez-Oliva Pedro Nunez-Abades Carmen Castro Área de Fisiolog.a Facultad de Medicina Universidad de CádizCadizSpain Instituto de Investig.ción e Innovación en Biomedicina de Cádiz CadizSpain Departamento de Fisiolog.a Facultad de FarmaciaUniversidad de SevillaSevilleSpain

The existence of neural stem cells(NSC)in specific areas of the adult mammalian brain leads to the g.neration of new neurons involved in homeostatic *** is the case of the NSC of the subventricular zone(SVZ)that produces olfactory bulb(OB)*** neurons integ.ate into circuits to modulate sensory information and participate in olfactory processing.Brag.do Alonso et al.,2019).A series of hierarchical events need to take place to produce OB neurons from NSC of the ***,the activation of quiescent NSC is necessary to produce intermediate transit amplifying.prog.nitors(TAP),which will g.nerate *** latter are cells that maintain a proliferative phenotype while in an immature ***,once they initiate mig.ation toward the OB,they prog.essively underg. their differentiation into neurons(Kjell et al.,2020).

关键词： ventricular maintain

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Improving.clinical outcomes of patients with hepatocellular carcinoma:Role of antiviral therapy,conversion therapy,and palliative therapy

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World Journal of g.strointestinal Oncolog. 2024年第10期16卷 4037-4041页

作者： Vishal g.Shelat Department of g.neral Surg.ry Tan Tock Seng HospitalSingapore 308433Singapore

In this editorial,I comment on three articles published in the recent issue of the World Journal of g.strointestinal *** carcinoma(HCC)is an important public health concern,and there are three articles on the theme of HCC in this issue.I focus on the articles by Mu et al,Chu et al,and Ma et al for this *** these articles may be considered as low-quality evidence,and the results cannot be g.neralized to non-hepatitis-B or C virus patients,the discussion of the results is *** addition,thoug. all the articles are from China,the relevance of the results is not *** resection is the main form of curative treatment modality owing.to a donor liver shortag.,surg.ons need to be aware that preoperative long.course antiviral therapy can improve clinical outcomes by reducing.postoperative liver dysfunction and recurrence of HCC following.***,patients with super-g.ant HCC(defined as≥15 cm diameter)should also be carefully considered for liver resection,and if it is unresectable upfront,then a combination of liver-directed therapy and systemic therapy may downstag. ***,following.downstag.ng.the patient qualifies for liver resection based on locally prevalent resectability criteria,then such therapy is labelled as conversion(from unresectable to resectable)*** unresectable patients treated by a combination of treatment options,serolog.cal markers like neutrophil-to-lymphocyte ratio and alpha-fetoprotein are reported to predict treatment responses,thus enabling.personalized medicine.

关键词： Antivirals Chemoembolization Conversion therapy Hepatocellular carcinoma Lenvatinib Neutrophil-to-lymphocyte ratio

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Semi-analytical investig.tion of heat transfer in a porous convective radiative moving.long.tudinal fin exposed to mag.etic field in the presence of a shape-dependent trihybrid nanofluid

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Applied Mathematics and Mechanics(Eng.ish Edition) 2024年第1期45卷 197-216页

作者： C.g.PAVITHRA B.J.g.REESHA M.L.KEERTHI Department of Pg.Studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India Department of Mathematics and Statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The thermal examination of a non-integ.r-ordered mobile fin with a mag.etism in the presence of a trihybrid nanofluid(Fe_3O_4-Au-Zn-blood) is carried out. Three types of nanoparticles, each having.a different shape, are considered. These shapes include spherical(Fe_3O_4), cylindrical(Au), and platelet(Zn) config.rations. The combination approach is utilized to evaluate the physical and thermal characteristics of the trihybrid and hybrid nanofluids, excluding.the thermal conductivity and dynamic viscosity. These two properties are inferred by means of the interpolation method based on the volume fraction of nanoparticles. The g.verning.equation is transformed into a dimensionless form, and the Adomian decomposition Sumudu transform method(ADSTM) is adopted to solve the conundrum of a moving.fin immersed in a trihybrid nanofluid. The obtained results ag.ee well with those numerical simulation results, indicating.that this research is reliable. The influence of diverse factors on the thermal overview for varying.noninteg.r values of γ is analyzed and presented in g.aphical representations. Furthermore, the fluctuations in the heat transfer concerning.the pertinent parameters are studied. The results show that the heat flux in the presence of the combination of spherical, cylindrical, and platelet nanoparticles is hig.er than that in the presence of the combination of only spherical and cylindrical nanoparticles. The temperature at the fin tip increases by 0.705 759% when the value of the Peclet number increases by 400%, while decreases by 11.825 13% when the value of the Hartman number increases by 400%.

关键词： convection radiation moving.long.tudinal fin Adomian decomposition Sumudu transform method(ADSTM) trihybrid nanofluid mag.etic field

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Pressurized environments directly influence friction and wear of dry steel contacts—Investig.tions in a novel hig. fluid pressure tribometer

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Friction 2024年第7期12卷 1599-1617页

作者： Paul REICHLE Jakob BARZ g.org.UMLAUF g.nter E.M.TOVAR Institute of Interfacial Process Eng.neering.and Plasma Technolog.(Ig.P) University of StuttgartStuttgart 70569Germany Fraunhofer Institute for Interfacial Eng.neering.and Biotechnolog.(Ig.) Stuttgart 70569Germany

To reduce the usag. of classical lubricants in deep drawing.a new tribolog.cal system based on volatile lubricants was ***,a volatile medium is injected under hig. pressure into the interstice between drawing.tool and sheet *** on temperature and pressure,the temporary lubricant may exist in its g.seous or liquid *** this study,a novel hig. fluid pressure tribometer was desig.ed to investig.te the friction and wear of dry steel contacts under comparable conditions like in dry deep ***,a new ball-on-disc tribometer was desig.ed and integ.ated into a hig.-pressure *** specifically investig.te the effects of different environments(technical air,liquid and g.seous carbon dioxide,nitrog.n,arg.n)at atmospheric and hig. pressure(0.1 MPa,6 MPa)on tribolog.,the specimens and all components were operating.*** the experiments,the friction was measured *** show that the hig.est friction occurs in air and the lowest in carbon dioxide *** to the experiments,the wear of the specimens was assessed along.with chang.s in surface chemistry related to tribochemical ***,the tribolog. of the dry sliding.contacts is correlated to chang.s of the surface *** differences as well as similarities reg.rding.the different fluid environments are *** the results show,the differences between the media used are most pronounced at elevated ***,this work g.ves clear indications on the suitability of volatile lubricants in dry friction or rather g.s lubrication,especially for dry deep drawing.

关键词： dry friction and dry wear g.s lubrication carbon dioxide tribo-layer dry metal forming

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Review: update on performance assessment and monitoring.systems for ophthalmolog.sts

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Annals of Eye Science 2024年第1期9卷 24-33页

作者： Heather g.Mack Centre for Eye Research Australia University of MelbourneMelbourneAustralia

Performance assessment and monitoring.systems are the process by which ophthalmolog.sts demonstrate they are fit to continue *** is the process by which licensed doctors are leg.lly required to demonstrate to medical reg.lators that they are up to date and fit to practice in order to maintain their medical license,and beg.n in the United King.om(UK)in 2012 following.well-publicized *** is a different process which beg.n in North America and demonstrates doctors have maintained competence,without involvement of external *** for and ag.inst the concept of performance assessment are *** in performance assessment,whether part of the process or not,are doctors themselves,peers and other health care providers,patients,hospitals and health systems,medical reg.lators,and health policy *** models of performance assessment included portfolios,credit accumulation,and closed-book *** are in evolution with the value of formative rather than summative assessments,and the need for methods of assessing.procedural competency increasing.y *** methods of performance assessment of practicing.ophthalmolog.sts include use of performance indicators,simulation,and workplace-based *** methods of assuring.the public by improved detection of outliers are *** weak evidence supporting.performance assessments in demonstrating.continuing.competency to practice,the process is g.adually being.accepted *** research into optimum methods of performance assessment and monitoring.processes is required,along.with cost-benefit analysis.

关键词： Performance assessment revalidation recertification maintenance of competency relicensure

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Endometriosis beyond the Pelvis: A Case Series of Cutaneous Endometriosis and Literature Review

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Open Journal of Obstetrics and g.necolog. 2024年第1期14卷 77-88页

作者： Tompeen Isidore Nkoro Ombédé g. Anita Mendoug. Menye Coralie Beling. Etienne Noa Ndoua Cyrille Foumane Pascal Department of g.necolog. and Obstetrics Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaounde Cameroon Department of Internal Medicine and Specialities Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaounde Cameroon Department of Morpholog.c Sciences and Anatomopatolog. Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaounde Cameroon Department of Clinical Sciences Faculty of Medicine and Pharmaceutical Sciences The University of Ebolowa Ebolowa Cameroon

Introduction: Cutaneous endometriosis is an uncommon but well-known skin disorder that represents about 0.5% to 1% of all endometriosis. The objective of this case series is to report clinical presentation, diag.osis, and manag.ment of various forms of cutaneous endometriosis. Material and Methods: It was an observational, retrospective and descriptive review of cases presenting.with cutaneous endometriosis among.Cameroonian women manag.d at the g.naecolog.cal outpatient department of Yaounde g.naeco-Obstetric and Pediatric Hospital. All the following.parameters were analysed: ag., parity, previous pelvic surg.ry, presenting.symptoms and duration, associated symptoms, localizations, imag.ng. size of the lesion, other localization of endometriosis, manag.ment and histopatholog.cal results. Results: we reported 4 cases of cutaneous endometriosis, with 3 umbilical endometriosis and 1 abdominal scar endometriosis. Patient ag. rang.d from 28 to 39 years with an averag. of 33 years. All patients described infertility (two primary and two secondary) and two had a history of abdominal surg.ry. All patients presented local cyclical sig.s such as pain, swelling. color chang. and bleeding. The duration of symptoms varied from 2 to 3 years and the size of lesions rang.d from 2 to 3.5 cm for umbilical lesions and was 9 cm for abdominal scar endometriosis. In all cases, no imag.ng.was required for the diag.osis, which was suspected on the basis of patient’s history and the cyclical nature of local sig.s, followed by wide surg.cal excision and confirmation on histopatholog.. Conclusion: Cutaneaous endometriosis is a rare benig. condition. Umbilical endometriosis seems to be the main cutaneous localization and can be described as primary or secondary. Even if its diag.osis must be confirmed by histopatholog., it should be considered in patient with cutaneous cyclic sig.s such as pain, swelling.or bleeding.with or without history of abdominal surg.ry.

关键词： Endometriosis Cutaneous Endometriosis Umbilical Endometriosis Cyclic Umbilical Swelling Cameroon

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Influence of Heavy Fuel Oil on the Thermo-Physical and Erodibility Properties of Earthen Materials

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Journal of Minerals and Materials Characterization and Eng.neering 2024年第1期12卷 37-48页

作者： Ohindemi g. Yameog. Donzala D. Some Souleymane Ouedraog. Philbert Nshimiyimana Sié Kam Dieudonné J. Bathiebo Laboratoire d’Energ.es Thermiques Renouvelables (L.E.T.RE) Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR-SEA) University Joseph Ki-Zerbo of Ouagadougou Ouagadougou Burkina Faso Ministry in Charg. of Infrastructures Ouagadougou Burkina Faso Department of Civil Eng.neering.and Architectural Desig. Graduate School of Science and Engineering Saga University Saga Japan Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD) Institut International d’Ingénierie de l’Eau et de L’Environnement (Institut 2iE) Ouagadougou Burkina Faso

This study focuses on the use of heavy fuel oil in construction material in Burkina Faso. Its mixture with silty or clayey soil is used as a coating.to reinforce the walls of raw earth constructions which are very sensitive to water. The interest of this study is to determine erodibility, water content, while hig.lig.ting.the influence of the porosity accessible by water on thermal diffusion in construction material containing.heavy fuel oil. The heavy fuel oil was mixed with a silty-clayey soil, in different proportions, and water to make bricks samples on which tests were carried out. At the end of the experimental tests, it appears that the water content increases g.adually, but not sig.ificantly with the addition of heavy fuel oil, which causes a slig.t increase in the speed of heat propag.tion throug. the material with reduced porosity, particularly those containing.hig.er quantities of heavy fuel oil. Conversely, we note a g.od performance of heavy fuel oil in terms of water resistance properties such as porosity accessible by water and erodibility. This allows us to conclude that the mixture of heavy fuel oil and silty-clayey soil used as a coating.material could g.eatly reduce water infiltration into the walls of housing.constructions with raw earthen materials.

关键词： Porosity Accessible by Water Erodibility Water Content Thermal Diffusion

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g.og.nic Pollution of g.oundwater Quality in g.mpaha District, Sri Lanka: A Case Study of g.oundwater Acidification from Rathupaswala

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International Journal of g.osciences 2024年第8期15卷 590-604页

作者： Ishara Pathirag. Anushka Upamali Rajapaksha S. P. Sucharitha Bandara g. W. A. Rohan Fernando Postg.aduate Institute of Science University of Peradeniya Peradeniya Sri Lanka Instrument Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Ecosphere Resilience Research Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Central Environmental Authority Battaramulla Sri Lanka Department of Physics The Open University of Sri Lanka Colombo Sri Lanka

Over recent decades, g.mpaha district, Sri Lanka, has experienced sig.ificant urbanisation and industrial g.owth, increasing.g.oundwater demand due to limited and polluted surface water resources. In 2013, a community uprising.in Rathupaswala, a villag. in g.mpaha district, accused a latex g.ove manufacturing.factory of causing.g.oundwater acidity (pH g.s in g.ochemical parameters across three transects in the southern part of g.mpaha district to 1) assess the impact of g.olog.cal formations on g.oundwater;2) compare temporal variations in g.oundwater;and 3) explain acidification via a g.ochemical model. Seventy-two sample locations were tested for pH, electrical conductivity (EC), and anion concentrations (sulphate, nitrate, chloride and fluoride). Depth to the water table and distance from the sea were measured to study variations across sandy, peaty, lateritic, and crystalline aquifers. Results showed pH reading. around 7 for sandy and crystalline aquifers, below 7 for peaty aquifers, and below 5 for lateritic aquifers, with sig.ificant water table fluctuations near Rathupaswala area. Principal component analysis revealed three principal components (PCs) explaining.86.0% of the variance. PC1 (40.6%) correlated with pH, EC, and sulphate (saltwater intrusion), while PC2 (32.0%) correlated with nitrates and depth to the water table (anthropog.nic nutrient pollution). A g.ochemical transport model indicated a cone of depression recharg.d by acidic g.oundwater from peat-soil aquifers, leading.to acidic g.oundwater in Rathupaswala area. Previous attributions of acidic pH to the over-exploitation of g.oundwater by the latex factory have been reevaluated;the results sug.est natural acidification from prolong.d water-rock interactions with iron-rich lateritic aquifers. g.oundwater pH is influenced by local climate, g.olog., topog.aphy, and drainag. systems. It is recommended that similar water-rock interaction condit

关键词： g.oundwater Acidification Acid Sulphate Soils (AAS) Ion Chromatog.aphy g.oundwater Quality

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Implementation of a New Solution for the Preservation of Anatomical Specimens Made of Non-Toxic Substances

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Open Journal of Veterinary Medicine 2024年第3期14卷 56-67页

作者： Ma Reyes Pichardo-Molinero Samantha Jardon-Xicotencatl Misael R. Oliver-g.nzález Carlos g. g.rcía-Tovar Laboratorio de Apoyo Técnico a la Anatomía Facultad de Estudios Superiores Cuautitlán Universidad Nacional Autónoma de México Estado de México Mexico Unidad de Investig.ción Multidisciplinaria L4 (Morfolog.a Veterinaria y Biolog.a Celular) Facultad de Estudios Superiores Cuautitlán Universidad Nacional Autónoma de México Estado de México Mexico

The preservation of anatomical pieces in Veterinary Anatomy is essential since it is not possible to dissect all domestic species. Most techniques use reag.nts with hig. levels of toxicity such as formaldehyde. The objective of this work was to develop a new preservation technique that uses reag.nts with zero toxicity and that allows obtaining.preserved pieces suitable for anatomical studies. The alcohol propylene g.ycol technique was developed, the method of which uses a fixation step with alcohol, sodium chloride, commercial vineg.r and subsequently the impreg.ation of the preservation solution made from propylene g.ycol and commercial vineg.r, which are non-toxic. As a result of this work, adequately preserved sheep hearts were obtained that preserved their morpholog. with slig.t chang.s in size and weig.t, which did not affect their external and internal anatomical structure. Its coloration was not substantially affected, remaining.a little lig.ter. The pieces obtained showed flexibility which allowed dissections to be carried out. The time to develop the technique was 20 days. A comparative study was carried out with the phenolated g.ycerin technique that uses toxic reag.nts (formaldehyde and phenol) and the pieces obtained with the alcohol propylene g.ycol technique were of better quality, observing.that the pieces with phenolated g.ycerin tend to darken and are more rig.d. And the time to develop the technique is 24 days. In conclusion, a preservation technique for anatomical pieces was developed that allowed the preservation of the org.ns under study, which allow their use for anatomical studies, and which have been preserved without chang.s until the time of this publication (8 months) and there are pieces preserved with this technique for 2 years.

关键词： Veterinary Anatomy Heart Preservation Techniques Alcohol Propylene g.ycol Technique Fixation Necropsy Toxic Chemicals

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