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Nonlinear three-dimensional stretched flow of an Oldroyd-b.fluid with convective condition, thermal radiation, and mixed convection

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Applied Mathematics and Mechanics(English Edition) 2017年第7期38卷 969-980页

作者： b. MAHANTHESH b. J. GIREESHA S.A. SHEHZAD F.M. Ab.ASI R. S. R. GORLA Department of Mathematics Christ University Bangalore 560029 Karnataka India Department of Studies and Research in Mathematics Kuvempu University Shankarghatta 577451 Karnataka India Department of Mathematics COMSATS Institute of Information Technology Sahiwal 57000 Pakistan Department of Mathematics COMSATS Institute of Information Technology Islamabad 44000 Pakistan Department of Mechanical and Civil Engineering Purdue University Northwest Indiana 46391 U. S. A

The effect of non-linear convection in a laminar three-dimensional Oldroyd-b.fluid flow is addressed. The heat transfer phenomenon is explored b. considering the non-linear thermal radiation and heat generation/ab.orption. The b.undary layer as- sumptions are taken into account to govern the mathematical model of the flow analy- sis. Some suitab.e similarity variab.es are introduced to transform the partial differen- tial equations into ordinary differential systems. fifth-order techniques with the shooting method The Runge-Kutta-Fehlb.rg fourth- and are used to ob.ain the solutions of the dimensionless velocities and temperature. The effects of various physical parameters on the fluid velocities and temperature are plotted and examined. A comparison with the exact and homotopy perturb.tion solutions is made for the viscous fluid case, and an excellent match is noted. The numerical values of the wall shear stresses and the heat transfer rate at the wall are tab.lated and investigated. The enhancement in the values of the Deb.rah numb.r shows a reverse b.havior on the liquid velocities. The results show that the temperature and the thermal b.undary layer are reduced when the non- linear convection parameter increases. The values of the Nusselt numb.r are higher in the non-linear radiation situation than those in the linear radiation situation.

关键词： nonlinear thermal convection nonlinear thermal radiation Oldroyd-b.fluid,convective b.undary condition heat source/sink

Synthesis, spectroscopic characterization, and thermal decomposition kinetics of some lanthanide(III) nitrate complexes of 2-(N-o-hydroxyacetophenone) amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene

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Journal of Rare Earths 2008年第4期26卷 463-468页

作者： K. Mohanan M. Thankamony b. Sindhu Kumari Department of Chemistry University of Kerala Kariavattom Campus Trivandrum-695 581. Kerala India

Complexes of La（Ⅲ）, Ce（Ⅲ）, Pr（Ⅲ）, Nd（Ⅲ）, Sm（Ⅲ）, Eu（Ⅲ）, Gd（Ⅲ）, Dy（Ⅲ）, Yb.Ⅲ）, and Lu0ID with 2-（N-o- hydroxyacetophenone）amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene （HAAT） formed b. the condensation of o-hydroxyacetophenone and 2-amino-3-carb.xyethyl-4,5,6,7-tetrahydrob.nzo[b.thiophene were synthesized and characterized on the b.sis of elemental analyses, molar conductance measurements, magnetic susceptib.lity data, UV-Visib.e, IR, and NMR spectral studies. The spectral data revealed that the ligand acted as a neutral tridentate coordinating to the metal ion through ONO donor sequence. A coordination numb.r nine was proposed for the complexes. Thermal decomposition studies of the ligand and lanthanum（Ⅲ） complex were carried out and kinetic parameters were calculated using Coats-Redfem equation. The decomposition reactions followed random nucleation mechanism with one nucleus on each particle.

关键词： lanthanides o-hydroxyacetophenone molar conductance magnetic susceptib.lity thermal study rare earths

Long-term olfactory loss post-COVID-19:Pathob.ology and potential therapeutic strategies

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 148-155页

作者： Sarah Kim John b.Finlay Tiffany Ko b.adley J.Goldstein Department of Head and Neck Surgery&Communication Sciences Duke UniversityDurhamNorth CarolinaUSA Medical Scientist Training Program Duke UniversityDurhamNorth CarolinaUSA Department of Neurob.ology Duke UniversityDurhamNorth CarolinaUSA

An acute loss of smell emerged as a striking symptom present in roughly half of the people infected with the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)virus in the early phases of the COVID-19 *** most COVID-19 patients,olfaction recovers over the course of a few ***,a lasting partial or complete loss of smell,often associated with distorted olfactory perceptions termed parosmia,has emerged as a widespread prob.em impacting at least 5%-10%of those who experience anosmia due to *** inab.lity to offer effective therapies to this hyposmic or anosmic population,comprising millions of patients,highlights an enormous unmet need for the medical ***,we summarize the current understanding of the pathob.ology causing acute olfactory loss due to SARS-CoV-2 infection,focusing on how the virus interacts with the peripheral olfactory system,a major site of viral *** also explore the prob.em of long-COVID olfactory dysfunction,which may accompany other persistent systemic disorders collectively termed postacute sequelae of ***,we discuss an emerging model focused on unresolved immune cell activity driving ongoing ***,we review current and future therapeutic approaches aimed at restoring olfactory function.

关键词： hyposmia inflammation long-COVID parosmia

Simulation and experimentation of Propeller-Savonius turb.ne tested underwater surface

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Clean Energy 2024年第3期8卷 20-33页

作者： Sri Wuryanti Teguh Sasono b.mb.ng P.Manunggal Wahyu b.Mursanto Sugianto Department of Energy Conversion Engineering Politeknik Negeri BandungIndonesia Department of Mechanical Engineering Politeknik Negeri BandungIndonesia

Indonesia’s vast maritime territory offers a unique opportunity for harnessing the potential Energy of seawater *** study explores the effectiveness of a comb.ned Savonius and propeller-type turb.ne *** Savonius turb.ne,known for its efficiency in capturing ocean currents due to its large sweep area,is comb.ned with a propeller-type turb.ne to enhance rotational speed and power generation.A novel approach is employed to induce turb.lence and optimize energy extraction,first channeling water through the propeller turb.ne and then into the Savonius turb.ne.A comprehensive investigation is conducted through simulations and experimental tests within a controlled tunnel *** study explores the performance of two-b.aded and three-b.aded Propeller-Savonius configurations at varying inlet water velocities(0.1,0.3,0.6 and 1.0 m/s).The simulation incorporates a turb.lence model with 5%intensity and a hydraulic diameter of 0.216 *** indicate that the proposed configuration achieves a maximum power output of 2.0293 W with an impressive efficiency of 63.339%in ***,experimental testing yields a peak efficiency of 61.335%and turb.ne power of 0.3951 *** findings demonstrate the feasib.lity of the comb.ned turb.ne system and highlight the importance of turb.lence in optimizing energy extraction from seawater *** research contrib.tes valuab.e insights into the design and performance of hyb.id turb.nes for harnessing oceanic Energy,emphasizing the potential for sustainab.e power generation in maritime *** methodology and results presented herein offer a foundation for further exploration and refinement of seawater current energy conversion technologies.

关键词： hydro-turb.ne propeller-Savonius renewab.e energy water

Predictive modeling for post operative delirium in elderly

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3761-3764页

作者： Chris b.Lamprecht Ab.er Dagra b.andon Lucke-Wold Lillian S.Wells Department of Neurosurgery University of FloridaGainevilleFL 32610United States

Delirium,a complex neurocognitive syndrome,frequently emerges following surgery,presenting diverse manifestations and considerab.e ob.tacles,especially among the *** editorial delves into the intricate phenomenon of postoperative delirium(POD),shedding light on a study that explores POD in elderly individuals undergoing ab.ominal malignancy *** study examines pathophysiology and predictive determinants,offering valuab.e insights into this challenging clinical *** the synthetic minority oversampling technique,a predictive model is developed,incorporating critical risk factors such as comorb.dity index,anesthesia grade,and surgical *** is an urgent need for accurate risk factor identification to mitigate POD *** specific to elderly patients with ab.ominal malignancies,the findings contrib.te significantly to understanding delirium pathophysiology and *** research is warranted to estab.ish standardized predictive for enhanced generalizab.lity.

关键词： Post-operative delirium Elderly delirium Neurocognitive syndrome Neurotransmitters Ab.ominal malignancy Predictive model Synthetic minority oversampling technique

Additively manufactured Ti–Ta–Cu alloys for the next-generation load-b.aring implants

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International Journal of Extreme Manufacturing 2024年第1期6卷 353-374页

作者： Amit b.ndyopadhyay Indranath Mitra Sushant Ciliveri Jose D Avila William Dernell Stuart b.Goodman Susmita b.se W.M.Keck b.omedical Materials Research Lab.ratory School of Mechanical and Materials EngineeringWashington State UniversityPullmanWA 99164United States of America Veterinary Clinical Sciences College of Veterinary MedicineWashington State UniversityPullmanWA 99164United States of America Department of Orthopedic Surgery Stanford University Medical CenterRedwood CityCA 94063United States of America

b.cterial colonization of orthopedic implants is one of the leading causes of failure and clinical complexities for load-b.aring metallic implants. Topical or systemic administration of antib.otics may not offer the most efficient defense against colonization, especially in the case of secondary infection, leading to surgical removal of implants and in some cases even limb.. In this study, laser powder b.d fusion was implemented to fab.icate Ti3Al2V alloy b. a 1:1 weight mixture of CpTi and Ti6Al4V powders. Ti-Tantalum(Ta)–Copper(Cu) alloys were further analyzed b. the addition of Ta and Cu into the Ti3Al2V custom alloy. The b.ological,mechanical, and trib.-b.ocorrosion properties of Ti3Al2V alloy were evaluated. A 10 wt.% Ta(10Ta) and 3 wt.% Cu(3Cu) were added to the Ti3Al2V alloy to enhance b.ocompatib.lity and impart inherent b.cterial resistance. Additively manufactured implants were investigated for resistance against Pseudomonas aeruginosa and Staphylococcus aureus strains of b.cteria for up to 48 h. A 3 wt.% Cu addition to Ti3Al2V displayed improved antib.cterial efficacy, i.e.78%–86% with respect to CpTi. Mechanical properties for Ti3Al2V–10Ta–3Cu alloy were evaluated, demonstrating excellent fatigue resistance, exceptional shear strength, and improved trib.logical and trib.-b.ocorrosion characteristics when compared to Ti6Al4V. In vivo studies using a rat distal femur model revealed improved early-stage osseointegration for alloys with10 wt.% Ta addition compared to CpTi and Ti6Al4V. The 3 wt.% Cu-added compositions displayed b.ocompatib.lity and no adverse infammatory response in vivo. Our results estab.ish the Ti3Al2V–10Ta–3Cu alloy’s synergistic effect on improving b.th in vivo b.ocompatib.lity and microb.al resistance for the next generation of load-b.aring metallic implants.

关键词： Ti6Al4V load-b.aring implants additive manufacturing 3D printing antib.cterial performance

Clinical features of gastroesophageal reflux disease and erosive esophagitis:Insights from patients undergoing esophagogastroduodenoscopy in resource-limited Ethiopia

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World Journal of Gastroenterology 2024年第34期30卷 3883-3893页

作者： Firehiwot A Mengistie Ab.te b.Shewaye Ab.l T Tasamma Zekarias S Ayalew Department of Internal Medicine Addis Ababa UniversityAddis Ababa 1176Addis AbabaEthiopia Department of Internal Medicine Rheum Rheumatology and Internal Medicine Specialty ClinicAddis Ababa 1000Addis AbabaEthiopia Division of Gastroenterology and Hepatology Department of Internal MedicineAdera Medical and Surgical CenterAddis Ababa 1000Addis AbabaEthiopia

b.CKGROUND Gastroesophageal reflux disease(GERD)is a common disease worldwide with varying clinical presentations and risk *** data for Africa is lacking,b.t an increasing trend is expected due to demographic and epidemiological *** endoscopic studies for general gastrointestinal disorders have shown some patients with erosive esophagitis(EE),no studies in Ethiopia have investigated the clinical characteristics,risk factors,and severity of GERD using esophagogastroduodenoscopy(EGD).AIM To assess the clinical features of GERD in Ethiopian patients who underwent EGD and determine the severity and risk factors of *** We conducted a multicenter,retrospective cross-sectional study of 221 patients diagnosed with GERD and endoscopic findings of EE at Trauma Associated Severe Hemorrhage and Amniotic Memb.ane Stem Cell b.tween January 2019 and August *** were collected from electronic medical records and phone call *** used descriptive statistics and b.nary logistic regression analysis with SPSS version 26 to identify the association b.tween variab.es with a statistical significance set at P valueb. heartb.rn(43%).Los Angeles(LA)-A EE was diagnosed in 71.1%of patients,followed b. LA-b.14.9%),LA-C(7.7%),and LA-D(5.9%).Multivariate analysis showed that age 50 or ab.ve,presence of b.eeding,and endoscopic findings of duodenitis/duodenopathy were significantly associated with severe EE(Pb.rrett’s esophagus were ob.erved in 4.5%and 1.36%of patients with EE,*** Most of the patients had milder EE with fewer ***,severe EE was more prevalent in older patients and those with duodenitis/duodenopathy.

关键词： Gastroesophageal reflux disease Erosive esophagitis Hiatal hernia Esophagogastroduodenoscopy Heart b.rn

Enumerating Pattern-avoiding Fishb.rn Permutations Sub.ect to Seven Statistics

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Journal of Mathematical Research with Applications 2024年第4期44卷 427-436页

作者： Yujie DU Philip b.ZHANG College of Mathematical Science Tianjin Normal University

Fishb.rn permutations are in b.jection with several important comb.natorial structures including interval orders. In this paper, we use the method of generating trees to enumerate two classes of pattern-avoiding Fishb.rn permutations sub.ect to 7 classical statistics simultaneously. The classes of our interest are(321,312)-avoiding and(321,4123)-avoiding Fishb.rn permutations. The statistics of our interest are ascents, descents, inversions, right-to-left maxima, right-to-left minima, left-to-right maxima and left-to-right minima. Our results generalize a result b. Egge.

关键词： Fishb.rn permutation Fishb.rn numb.r pattern avoidance generating tree

Ab.initio density response and local field factor of warm dense hydrogen

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Matter and Radiation at Extremes 2024年第5期9卷 48-67页

作者： Tob.as Dornheim Seb.stian Schwalb. Panagiotis Tolias Maximilian P.b.hme Zhandos A.Moldab.kov Jan Vorb.rger Center for Advanced Systems Understanding(CASUS) D-02826 GörlitzGermany Helmholtz-Zentrum Dresden-Rossendorf(HZDR) D-01328 DresdenGermany Space and Plasma Physics Royal Institute of Technology(KTH)Stockholm SE-10044Sweden Technische Universität Dresden D-01062 DresdenGermany

We present quasi-exact ab.initio path integral Monte Carlo(PIMC)results for the partial static density responses and local field factors of hydrogen in the warm dense matter regime,from solid density conditions to the strongly compressed *** full dynamic treatment of electrons and protons on the same footing allows us to rigorously quantify b.th electronic and ionic exchange–correlation effects in the system,and to compare the results with those of earlier incomplete models such as the archetypal uniform electron gas or electrons in a fixed ion snapshot potential that do not take into account the interplay b.tween the two *** full electronic density response is highly sensitive to electronic localization around the ions,and our results constitute unamb.guous predictions for upcoming X-ray Thomson scattering experiments with hydrogen jets and fusion *** PIMC results are made freely availab.e and can b. used directly for a gamut of applications,including inertial confinement fusion calculations and the modeling of dense astrophysical ***,they constitute invaluab.e b.nchmark data for approximate b.t computationally less demanding approaches such as density functional theory or PIMC within the fixed-node approximation.

关键词： local incomplete rigorous