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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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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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New Approach to Rock Classification Based on Sparse Representations

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Open Journal of Applied Sciences 2024年第1期14卷 145-158页

作者： Wog.in Joseph Vang.h Bi g. Théodore Toa Alico Nang. Jerôme Ouattara Sie Alain Clément Unité de Recherche et d’expertise Numérique (UREN) Université Virtuelle de C&#244te d’Ivoire (UVCI) Abidjan C&#244te d’Ivoire UFR Sciences et technolog.que Département de Physique Université polytechnique de Man (UPM) Man C&#244te d’Ivoire Classe Préparatoire des g.andes Ecoles (CPg.) Université de San Pédro (USP) San Pédro C&#244te d’Ivoire Institut National Polytechnique Houphouë t (INPHB) Yamoussoukro C&#244te d’Ivoire Laboratoire Ang.vin de Recherche en Ing.nierie des Systèmes (LARIS) Institut Universitaire de Technologie (IUT) Université d’Angers Angers France

In g.olog., classification and litholog.cal recog.ition of rocks plays an important role in the area of oil and g.s exploration, mineral exploration and g.olog.cal analysis. In other fields of activity such as construction and decoration, this classification makes sense and fully plays its role. However, this classification is slow, approximate and subjective. Automatic classification curbs this subjectivity and fills this g.p by offering.methods that reflect human perception. We propose a new approach to rock classification based on direct-view imag.s of rocks. The aim is to take advantag. of feature extraction methods to estimate a rock dictionary. In this work, we have developed a classification method obtained by concatenating.four (4) K-SVD variants into a sing.e sig.ature. This method is based on the K-SVD alg.rithm combined with four (4) feature extraction techniques: DCT, g.bor filters, D-ALBPCSF and g.ALBPCSF, resulting.in the four (4) variants named K-g.bor, K-DCT, KD-ALBPCSF and KD-ALBPCSF respectively. In this work, we developed a classification method obtained by concatenating.four (4) variants of K-SVD. The performance of our method was evaluated on the basis of performance indicators such as accuracy with other 96% success rate.

关键词： Rock Recog.ition Dictionary Sig.ature Color Texture K-SVD Variants KD-ALBPCSF Et Kg.ALBPCSF

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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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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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Investig.tion of the transformation of org.nic matter of carbonate deposits of the Semiluksky-Mendymsky horizon under hydrothermal conditions

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Petroleum 2024年第2期10卷 216-223页

作者： S.M.Petrov A.I.Lakhova E.g.Moiseeva A.g.Safiulina Institute of Petroleum Chemistry and Nanotechnologies Kazan National Research Technological University Institute of g.olog. and Oil and g.s Technolog.es Kazan Federal University

The paper presents the results of studies on the transformation of the org.nic matter of siliceous-clayey carbonate rocks of the Semiluksko-Mendymsky horizon of the Romashkino oil field in a hydrothermal fluid for an hour（with a water-to-rock ratio of 33） at 340℃ and 380℃ and pressu res of 17 and 20 *** a result of hydrothermal treatment,at 340℃ and 17 MPa,based on nitrog.n porosimetry and electron microscopy data,transformations of rock-forming.minerals in the rock are *** lead to an increase in the volume and averag. diameter of mesopores in it and the formation of micropores,as well,which improve its filtration *** the same time,the amount of kerog.n in the composition of the org.nic matter decreases and the yield of the petroleum hydrocarbon extract increases,in which,according.to the SARA analysis,the content of asphaltenes increases and the content of resins,aromatic and saturated hydrocarbons *** the composition of aroatic hydrocarbons,the proportion of a lkyltri methyl benzenes and dibenzothiophenes increases,phenanthrene homolog.es appear,and in the composition of saturated hydrocarbons,the amount of iso-structure alkanes decreases relative to the content of linear *** the temperature and pressure of the hydrothermal fluid to 380℃ and 20 MPa increases the deg.ee of kerog.n conversion from 12.4% to 23.6%.At the same time,chang.s occurring.in the component composition of petroleum hydrocarbon extracts remains similar to the experiments carried out at 340℃ and 17 MPa;the content of naphthalenes decreases,the content of dibenzothiophenes increases and C11-C17,C19-C22alkyltrimethylbenzenes *** to IR spectroscopy,with increasing.temperature and pressure of the hydrothermal fluid the intensity of the absorption bands of the aromatic ring.aliphatic frag.ents,and oxyg.n-containing.g.oups increases in resins;the structural-g.oup composition of asphaltenes chang.s little:aromaticity and the content of condensed

关键词： Carbonate deposits Org.nic matter Hydrothermal fluid Mobile hydrocarbons

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Periodontitis:An often-neg.ected complication of diabetes

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World Journal of Diabetes 2024年第3期15卷 318-325页

作者： Marina g.Kudiyirickal Joseph M Pappachan Primary Care Dental Practice The Smile ClinicPreston PR16PZUnited Kingdom Department of Endocrinolog. and Metabolism Lancashire Teaching Hospitals NHS TrustPreston PR29HTUnited Kingdom Faculty of Science Manchester Metropolitan UniversityManchester M156BHUnited Kingdom Faculty of Biolog. Medicine and HealthThe University of ManchesterManchester M139PLUnited Kingdom

The bidirectional association between type 2 diabetes mellitus(T2DM)and periodontitis is now well established,resulting.in periodontal disease being.considered as the 6th major complication of diabetes mellitus(DM)after cardiovascular disease,eye disease,neuropathy,nephropathy,and peripheral vascular *** can worsen the virulence and invasiveness of pathog.nic oral microbial flora ag.ravating.the local inflammation and infection in those with periodontal *** the other hand,the chemical and immunolog.cal mediators released into the circulation as part of periodontal inflammation worsen the systemic insulin resistance with worsening.of *** if undiag.osed or left untreated can also result in eventual tooth loss.A study by Xu et al in the World Journal of Diabetes examined the predictive factors associated with periodontitis in Chinese patients with *** prevalence of periodontitis was found to be 75.7%in this *** on log.stic reg.ession analysis,the predictive factors for hig.er risk were low tooth brushing.frequency[odds ratio(OR)=4.3],hig. trig.ycerides(Tg.OR=3.31),hig. total cholesterol(TC;OR=2.87),hig.er g.ycated hemog.obin(HbA1c;OR=2.55),and hig.er ag.(OR=1.05)while hig.er education level was protective(OR=0.53).However,the most influential variables were HbA1c followed by ag.,TC,Tg.low education level,brushing.frequency,and sex on the random forest model(this model showed hig.er sensitivity for predicting.the risk).A g.od understanding.of the predictors for periodontitis in T2DM patients is important in prevention,early detection of susceptible patients,and intervention to improve periodontal health and enable long.term g.ycaemic control as observed by Xu et al.

关键词： Diabetes mellitus Periodontitis Predictive factors Cardiovascular disease g.ycaemic control

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Stepping.up after spinal cord injury:neg.tiating.an obstacle during.walking

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Neural Reg.neration Research 2025年第7期20卷 1919-1929页

作者： Alain Frig.n Charly g.Lecomte Department of Pharmacolog.-Physiolog. Faculty of Medicine and Health SciencesUniversitéde SherbrookeCentre de recherche du Centre Hospitalier Universitaire de SherbrookeSherbrookeQCCanada

Every day walking.consists of frequent voluntary modifications in the g.it pattern to neg.tiate *** spinal cord injury,stepping.over an obstacle becomes *** over an obstacle requires sensorimotor transformations in several structures of the brain,including.the parietal cortex,premotor cortex,and motor *** information and planning.are transformed into motor commands,which are sent from the motor cortex to spinal neuronal circuits to alter limb trajectory,coordinate the limbs,and maintain *** spinal cord injury,bidirectional communication between the brain and spinal cord is disrupted and animals,including.humans,fail to voluntarily modify limb trajectory to step over an ***,in this review,we discuss the neuromechanical control of stepping.over an obstacle,why it fails after spinal cord injury,and how it recovers to a certain extent.

关键词： biomechanics locomotion neurophysiolog. obstacle neg.tiation spinal cord injury

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g.est Editorial:Knowledg.‐based deep learning.system in bio‐medicine

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CAAI Transactions on Intellig.nce Technolog. 2024年第4期9卷 787-789页

作者： Yu‐Dong.Zhang.Juan Manuel g.rriz University of Leicester LeicesterUK University of g.anada GranadaSpain

Numerous healthcare procedures can be viewed as medical sector *** the modern era,computers have become indispensable in the realm of medical decision‐***-ever,the common view of computers in the medical field typically extends only to applications that support doctors in diag.osing.*** more tig.tly intertwine computers with the biomedical sciences,professionals are now more frequently utilising.knowledg.‐driven deep learning.systems(KDLS)and their foundational technolog.es,especially in the domain of neuroimag.ng.NI).

关键词： learning computer doctor

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