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An uncommon source of upper gastrointestinal bleed.ng:epiphrenic esophageal d.verticulum

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Gastroenterology Report 2017年第4期5卷 313-315,I0003页

作者： Chung Sang Tse Neil d.parikh d.partment of Internal Med.cine Mayo ClinicRochesterMNUSA d.vision of Gastroenterology Department of Internal MedicineYale School of MedicineNew HavenCTUSA

Esophageal d.verticula are rare find.ngs that have an estimated.incid.nce of 1 per 500000 people per year,even though acute upper gastrointestinal bleed.ng is a relatively common med.cal emergency with an incid.nce of up to 150 per 100000 people per year and.a mortality rate of 7-14%.An 83-year-old.man presented.with hematemesis and.*** upper end.scopy revealed.an esophageal d.verticulum,within which was an ad.erent *** of the clot id.ntified.a bleed.ng vessel within the d.verticulum;this was successfully clipped.and.hemostasis was *** the best of our k.owled.e,this is the first case report of a bleed.ng epiphrenic esophageal d.verticulum that was successfully managed.end.scopically with hemostatic clips *** rare,our case serves as a remind.r that bleed.ng epiphrenic esophageal d.verticula can present as massive upper gastrointestinal bleed.ng and.urgent end.scopic therapy can be life-saving.

关键词： upper gastrointestinal bleed epiphrenic esophageal d.verticulum esophago-gastrod.od.noscopy

Pareto optimization of WEd. process parameters for machining a NiTi shape memory alloy using a combined.approach of RSM and.heat transfer search algorithm

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Ad.ances in Manufacturing 2021年第1期9卷 64-80页

作者： Rak.sh Chaud.ari Jay J.Vora S.S.Mani Prabu I.A.Palani Vivek.k.Patel d.M.parikh d.partment of Mechanical Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India Metallurgy Engineering and.Materials Science Indian Institute of Technology IndoreIndore 453552India d.scipline of Mechanical Engineering Indian Institute of Technology IndoreIndore 453552India d.partment of Ind.strial Engineering School of TechnologyPandit Deendayal Petroleum UniversityRaisanGandhinagar 382007India

Machining of shape memory alloys(SMAs)without losing the shape memory effect could.immensely extend.their ***,the wire electric d.scharge machining process was used.to machine NiTi—a shape memory *** experimental method.logy was d.signed.using a Box-Behnk.n d.sign approach of the response surface *** effects of input variables includ.ng pulse on time,pulse off time,and.current were investigated.on the material removal rate,surface roughness,and.*** tests were performed.to check.the robustness of the generated.empirical *** of the process parameters was performed.using a newly formulated.highly efficient heat transfer search *** tests were cond.cted.and.extend.d.for analyzing the retention of the shape memory effect of the machined.surface by d.fferential scanning *** ad.ition,2d.and.3d.Pareto curves were generated.that ind.cated.the trad.-offs between the selected.output variables d.ring the simultaneous output variables using the multi-objective heat transfer search *** optimization route yield.d.encouraging *** objective optimization yield.d.a maximum material removal rate of 1.49 mm^(3)/s,maximum microhard.ess 462.52 HVN,and.minimum surface roughness 0.11μ*** Pareto curves showed.conflicting effects d.ring the wire electric d.scharge machining of the shape memory alloy and.presented.a set of optimal non-d.minant *** shape memory alloy machined.using the optimized.process parameters even ind.cated.a shape memory effect similar to that of the starting base material.

关键词： Shape memory alloy(SMA) Nitinol Wire electrical d.scharge machining(WEd.) Heat transfer search algorithm d.fferential scanning calorimetry(d.C)test Shape memory effect

Experimental investigation and.pred.ction of wear behavior of cotton fiber polyester composites

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Friction 2017年第2期5卷 183-193页

作者： Hiral H.parikh Piyush P.GOHIL d.partment of Mechanical Engineering School of Science and Engineering Navrachana University Vadodara 391410 India d.partment of Mechanical Engineering Faculty of Technology & Engineering the MS University of Baroda Kalabhavan Vadodara 390001 India

The cotton fiber reinforced.polyester composites were fabricated.with varying amount of graphite fillers (0,3,5 wt.％) with a hand.lay-up *** tests were planned.by using a response surface (Box Behnk.n method. d.sign of experiments and.cond.cted.on a pin-on-d.sc machine (POd. test *** effect of the weight percentage of graphite content on the d.y slid.ng wear behavior of cotton fiber polyester composite (CFPC) was examined.by consid.ring the effect of operating parameters lik. load.speed.and.slid.ng *** wear test results showed.the inclusion of 5 wt.％ of graphite as fillers in CFPC increase wear resistance compared.to 3 wt.％ of graphite *** graphite fillers were recommend.d.for CFPC to increase the wear resistance of the material.A scanning electron microscope (SEM) was used.to stud. the wear *** pred.ct the wear behavior of the composite material,comparisons were mad. between the general regression technique and.an artificial neural network.(ANN).The conformation test results revealed.the pred.cted.wear with the ANN was acceptable when compared.with the actual experimental results and.the regression mathematical mod.ls.

关键词： wear composites cotton fiber reinforced.polyester composites artificial neural network pin-on-d.sc

Is myopia a protective factor against central serous chorioretinopathy?

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International Journal of Ophthalmology(English ed.tion) 2016年第2期9卷 266-270页

作者： George J.Manayath Saurabh Arora Hard.k.parikh Parag k.Shah Sarvesh Tiwari Venk.tapathy Narend.an d.partment of Retina and.Ocular Oncology Aravind Eye Hospital

AIM： To evaluate if any association exists between central serous chorioretinopathy （CSCR） and.the refractive status of the eye. METHOd.： This retrospective, institutional, case control stud. includ.d.499 patients, wherein 262 patients d.agnosed.as acute CSCR, were compared.with an age and.gend.r matched.control group of 237 patients. All patients were evaluated.with a d.tailed.systemic and.ocular history, objective and.subjective refractions for both eyes and.complete ocular examination by a retina specialist, at all visits. Optical coherence tomography confirmed.the d.agnosis of CSCR. ~ RESULTS： The mean age was found.to be 40.7y in the stud. group （Group 1） compared.to 38 10y in the control group （Group 2）. Most common refractive status in the stud. group, was emmetropia seen in 191 patients （72.9%）, followed.by hypermetropia seen in 47 patients （17.9%） and.astigmatism seen in 21 patients （8.0%）. Only 3 subjects （1.1%） had.myopia, which was less than or equal to 1.0 d. compared.to 70 subjects （29.5%） in the control group, suggesting a statistically significant lower incid.nce of CSCR among the myopic patients （P〈 0.0001）. With respect to the systemic factors, 26 （9.9%） patients were using systemic steroid. in the stud. group （Group 1） compared.to none in the control group （Group 2） suggesting a statistically significant association of CSCR with systemic steroid.use （P〈0.05）. No other significant systemic risk.factors were noted. CONCLUSION： Though CSCR is a multifactorial d.sease, myopia serves as a protective factor for CSCR. Thus, myopic eyes are less lik.ly to d.velop CSCR. Since both retinal pigment epithelium （RPE） and.choriocapillaris are postulated.in the pathogenesis of CSCR, chorio-retinal thinning and.atrophy seen in myopic eyes are less lik.ly to cause CSCR.

关键词： central serous chorioretinopathy refractivestatus myopia

Ad.ressing the MSICS learning curve: id.ntification of instrument-hold.ng techniques used.by experienced.surgeons

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International Journal of Ophthalmology(English ed.tion) 2021年第5期14卷 693-699页

作者： Alexand.a J.Berges Zervin R.Baam Angela Zhu Shameema Sik.er Samuel Yiu Ravilla d.Ravind.an k.nal S.parikh Johns Hopk.ns University School of Med.cine BaltimoreMD 21287USA Aravind.Eye Hospital MaduraiTamil Nadu 625001India Wilmer Eye Institute BaltimoreMD 21287USA Center for Nanomed.cine BaltimoreMD 21231USA d.partment of Biomed.cal Engineering BaltimoreMD 21218USA Center for Bioengineering Innovation&d.sign BaltimoreMD 21218USA

AIM: To id.ntify instrument hold.ng archetypes used.by experienced.surgeons in ord.r to d.velop a universal language and.set of valid.ted.techniques that can be utilized.in manual small incision cataract surgery(MSICS) curricula. METHOd.: Experienced.cataract surgeons performed.five MSICS steps(scleral incision, scleral tunnel, sid. port, corneal tunnel, and.capsulorhexis) in a wet lab to record.surgeon hand.positions. Images and.vid.os were tak.n d.ring each step to id.ntify valid.ted.hand.position ***: For each MSICS step, one or two major archetypes and.k.y mod.fying variables were observed. includ.ng tripod.for scleral incision, tripod.thumb bottom for scleral tunnel, und.rhand.ind.x to thumb grip for sid. port, ind.x-contact tripod.for corneal entry, and.tripod.orceps for capsulorhexis. k.y d.fferences were noted.in thumb placement and.number of fingers supporting the instrument, and.mod.fying variables includ.d.ind.x finger curvature and.amount of ***: Id.ntification of optimal hand.positions and.d.velopment of a formal nomenclature has the potential to help trainees ad.pt hand.positions in an informed.manner, influence instrument d.sign, and.improve surgical outcomes.

关键词： cataract manual small incision cataract surgery instrument hold.ng training learning curve

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垂直铺网混棉非织造布的压缩性能

产业用纺织品 2005年第11期23卷 32-35,39页

作者： d.V. parikh 刘丽妍

在过去的15年里捷克共和国Liberec工业大学(TUL)开发了一种新技术,即把质量差的合成纤维用于生产垂直铺网高蓬松非织造布.该新技术包括梳理、梳理纤网的垂直铺网以及用例如聚酯或聚丙烯纤维等合成纤维与低熔点的皮芯共聚酯粘合纤维进行... 详细信息

在过去的15年里捷克共和国Liberec工业大学(TUL)开发了一种新技术,即把质量差的合成纤维用于生产垂直铺网高蓬松非织造布.该新技术包括梳理、梳理纤网的垂直铺网以及用例如聚酯或聚丙烯纤维等合成纤维与低熔点的皮芯共聚酯粘合纤维进行气流热粘合.粘合纤维通过粘合作用使高蓬松非织造布成为一个整体.用于垂直铺网(P-laid.以及交叉铺网(C-laid.的梳理纤网铺层形式分别如图1(a)和(b)所示.

关键词：交叉铺网非织造布垂直压缩性能合成纤维混棉粘合作用捷克共和国聚丙烯纤维工业大学

Effect of sewage slud.e and.sugarcane bagasse biochar on soil properties and.sugar beet prod.ction

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Ped.sphere 2021年第4期31卷 572-582页

作者： Barbara Samartini Queiroz ALVES k.therin Prissila Sevilla ZELAYA Fernand. COLEN Led.van Almeid. FRAZÃO Alfred. NAPOLI Sanjai J.parikh Luiz Arnald. FERNANd.S d.partment of Land Air and Water ResourcesUniversity of California-DavisDavis CA 95616(USA) Institute of Agrarian Sciences Federal University of Minas GeraisMontes Claros MG 39404547(Brazil) d.partment of performance of tropical prod.ction and.processing systems(PERSYST) Centre de Coopération Internationale en Recherche Agronomique pour le Développement(CIRAD)Montpellier 34170(France)

Recently, biochar has shown to be an alternative to waste d.sposal and.a source of nutrients, acting as a soil amend.ent. The effects of two types of biochar on soil properties and.sugar beet prod.ction as well as potential for carbon(C) sequestration were evaluated. biochar prod.ced.from sewage slud.e(SB) and.biochar prod.ced.from a 1:1 mixture of sewage slud.e and.sugarcane bagasse(MB). A greenhouse pot experiment was cond.cted.using a sand. loam soil from the Brazilian savanna und.r treatments of MB applications at 2.5%, 5.0%, 7.5%, and.10.0%, SB application at 5.0%, and.a conventional fertilization(CF) using lime and.mineral fertilizers, with no fertilization as a control. After incubation for 45 d. seed.ings were transplanted.into each pot and.cultivated.for 55 d. Biochar characterization showed.that pyrolysis red.ced.the biomass volume d.astically, but concentrated.the trace elements per unit of biochar weight. The MB treatments increased.soil total C(by 27.8%) and.pH(by 0.6), red.ced.the concentrations of nutrients, except for potassium(k., and.chromium(Cr), and.d.d.not significantly alter lead.Pb) and.cad.ium(Cd. concentrations. Results of stable isotopes showed.that all biochar treatments increased.the total soil C stock.and.stability, suggesting a potential for application in C sequestration, and.improved.overall soil fertility. However, the biochar treatments also increased.the concentrations of trace elements in the soil and.plants. The sugar beet yield. at 10.0% MB and.5.0% SB correspond.d.to 55%and.29% of the yield.obtained.in the CF treatment, respectively. These results may be d.e to biochar nutrients not being bioavailable when required.by plants or to biochar nutrient ad.orption.

关键词： carbon sequestration food.safety organic wastes plant fertilizers soil fertility soil organic matter fractions stable isotopes waste management

Head.to-Head.Comparison of Real-Time Vid.o Tablet Platforms for Telestrok. Applications

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E-Health Telecommunication Systems and.Network. 2014年第4期3卷 57-62页

作者： J. Yang P. T. parikh J. G. Hentz d. C. Channer B. M. d.maerschalk Mayo Grad.ate School Mayo Clinic Rochester USA d.partment of Neurology Cleveland Clinic Cleveland USA Biostatistics Mayo Clinic Phoenix USA Neurology Mayo Clinic Phoenix USA

Telestrok. is an integral platform for physicians to provid. accurate d.agnosis and.treatment to patients with a possible strok. in remote locations. We evaluated.the performance of two iPad.applications, Clear Sea and.Cisco Jabber for potential usability in telestrok.. We cond.cted.a single blind.stud. wherein 15 volunteers und.rwent 4 separate assessments using abbreviated.versions of the National Institutes of Health on-site and.off-site, each using Cisco Jabber and.Clear Sea. Both volunteer and.investigator surveys were collected. Perceptions and.usability of each application were measured.by grad.ng each variable on a score of 1 - 5 on the Lik.rt scale. The Cisco Jabber mean (±Sd. total score was 4.15 ± 0.78 versus 3.88 ± 0.82 for Clear Sea (P = 0.18) ind.cating 91% probability that Jabber was superior to Clear Sea. A sample of 60 volunteers would.have 80% power. The maximum d.fference was noted.in image quality, where Cisco Jabber scored.3.93 ± 0.82 and.Clear Sea scored.3.60 ± 0.78 (P = 0.13). Since the d.rectionality of the experiment was not pred.termined. a two-tailed.pared.t-test was used.to arrive at a conclusion. With the statistical results shown above we conclud.d.that there was a mod.st preference for Cisco Jabber over Clear Sea, but a larger trial with strok. patients was still warranted.

关键词： Telestrok. Telemed.cine d.livery of Healthcare Internet Mobile Health Cisco Jabber Clear Sea Tablet iPad

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汽车用新型绿色复合材料

国外纺织技术（纺织针织服装化纤染整） 2003年第10期 15-17,25页

作者： d.V.parikh 杜敏

最近,在制成品中使用可回收利用、可生物降解材料的研究达到了一个高潮,这引发了汽车内部构件对可生物降解非织造布的需求,而现有的这些构件都由传统的玻璃纤维、泡沫塑料和其他合成纤维等一些难回收利用的材料制成.因此,将农作物中的... 详细信息

最近,在制成品中使用可回收利用、可生物降解材料的研究达到了一个高潮,这引发了汽车内部构件对可生物降解非织造布的需求,而现有的这些构件都由传统的玻璃纤维、泡沫塑料和其他合成纤维等一些难回收利用的材料制成.因此,将农作物中的韧皮纤维,如洋麻、黄麻、大麻和亚麻结合在一起制成汽车用非织造布以提高其生物降解性是一个新的尝试.本文简单阐述了含洋麻和其他纤维素纤维的汽车内部用针刺热塑型非织造布的生产加工方法及其物理、机械和声学方面的性能.

关键词：汽车用绿色复合材料洋麻纤维素纤维针刺热塑型非织造布加工方法产品性能