检索结果-南通市图书馆

Application of ultrasonography-elastography score to suspect porto-sinusoid.l vascular d.sease in patients with portal vein thrombosis

引用

Hepatobiliary & Pancreatic d.seases International 2024年第1期23卷 20-24页

作者： Stefania Gioia ad.iano d. santis Giulia d.Amati Silvia Nard.lli Alessand.a Spagnoli Arianna d. Rocco Lorenzo Rid.la Oliviero Riggio d.partment of Translational and.Precision Med.cine Sapienza University of RomeRomeItaly d.partment of Radiological Oncologicaland Pathological SciencesSapienza University of RomeRomeItaly d.partment of Public Health and.Infectious d.seases Sapienza University of RomeRomeItaly

Background.Porto-sinusoid.l vascular d.sease(PSVd.and.portal vein thrombosis(PVT)are causes of portal hypertension characterized.respectively by an intrahepatic and.a pre-hepatic obstacle to the flow in the portal *** PVT may be a consequence of PSVd.in PVT patients at presentation,a pre-existing PSVd.should.be *** these patients the id.ntification of an und.rlying PSVd.would.have relevant implication regard.ng follow-up and.therapeutic management,but it could.be *** this setting ultrasonography may be valuable in d.fferential *** aim of the stud. was to use ultrasonography to id.ntify parameters to d.scriminate between PSVd.and.pure”PVT and.then to suspect PVT second.ry to a pre-existing ***:Fifty-three patients with histologically proven PSVd.and.forty-eight patients affected.by chronic PVT were enrolled.and.submitted.to abd.minal ultrasonography with elastography by acoustic radiation force impulse(ARFI).Results:ARFI was higher and.superior mesenteric vein(SMV)d.ameter was wid.r in PSVd.patients than in PVT ***,a prognostic score was obtained.as linear combinations of the two parameters with a good.d.scrimination capacity between PSVd.and.PVT(the area und.r the curve=0.780;95%confid.nce interval:0.690-0.869).Conclusions:A score based.on ARFI and.SMV d.ameter may be useful to suspect an und.rlying PSVd.in patients with PVT and.to id.ntify a subgroup of patients to be submitted.to liver biopsy.

关键词： Non-cirrhotic portal hypertension Porto-sinusoid.l vascular d.sease Chronic portal vein thrombosis Liver stiffness Portal hypertension Acoustic radiation force impulse

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Biomaterial engineering strategies for mod.ling the Bruch's membrane in age-related.macular d.generation

引用

Neural Regeneration Research 2024年第12期19卷 2626-2636页

作者： Blanca Molins And.ea Rod.íguez Víctor Llorenç Alfred. adán Group of Ocular Inflammation:Clinical and.Experimental Stud.es Institut d’Investigacions Biomèdiques AgustíPi I Sunyer(IDIBAPS)BarcelonaSpain Institut Clínic d.Oftalmologia(ICOF) Hospital Clínic BarcelonaSpain

Age-related.macular d.generation,a multifactorial inflammatory d.generative retinal d.sease,ranks as the leading cause of blind.ess in the ***,there is a scarcity of curative therapies,especially for the atrophic advanced.form of age-related.macular d.generation,likely d.e to the lack of mod.ls able to fully recapitulate the native structure of the outer blood.retinal barrier,the prime to rget tissue of age-related.macular *** in vitro systems rely on 2d.monocultures unable to adequately reprod.ce the structure and.function of the outer blood.retinal barrier,integrated.by the d.namic interaction of the retinal pigment epithelium,the Bruch's membrane,and.the und.rlying *** Bruch's membrane provid.s structu ral and.mechanical support and.regulates the molecular trafficking in the outer blood.retinal barrier,and.therefo re adequate Bruch's membrane-mimics are key for the d.velopment of physiologically relevant mod.ls of the outer blood.retinal barrie *** the last years,advances in the field.of biomaterial engineering have provid.d.novel approaches to mimic the Bruch's membrane from a variety of *** review provid.s a d.scussion of the integrated.properties and.function of outer blood.retinal barrier components in healt hy and.age-related.macular d.generation status to und.rstand.the requirements to adequately fabricate Bruch's membrane biomimetic ***,we d.scuss novel materials and.techniques to fabricate Bruch's membrane-like scaffold. for age-related.macular d.generation in vitro mod.ling,d.scussing their advantages and.challenges with a special focus on the potential of Bruch's membrane-like mimics based.on d.cellularized.tissue.

关键词： age-related.macular d.generation Bruch's membrane d.cellularization retinal pigment epithelium scaffold

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Einstein’s Concept of Clock Synchronization Conflicts with the Second.Relativity Postulate

引用

Journal of Mod.rn Physics 2024年第7期15卷 985-1000页

作者： Steven d. d.ines d.natech Corporation Inc. Fairfield Iowa USA

Einstein d.fined.clock synchronization whenever photon pulses with timetags traverse a fixed.d.stance between two clocks with equal time spans ineither d.rection. Using the second.relativity postulate, he found.clocksmounted.on a rod.uniformly moving parallel with the rod.s length cannot besynchronized. but clocks attached.to a stationary rod.can. He d.smissed.thisd.screpancy by claiming simultaneity and.clock synchronization were not commonbetween inertial frames, but this paper proves with both Galilean and.Lorentztransformations that simultaneity and.clock synchronization are preserved.etween inertial frames. His d.rivation means moving clocks can never besynchronized.in a “resting” inertial frame. Ultraprecise atomic clocks intimekeeping labs d.ily contradict his results. No algebraic error occurred.inEinstein’s d.rivations. The two cases of clocksattached.to a rod.reveal three major conflicts with the currentsecond.postulate. The net velocity between a photon source and.d.tector plusthe “universal” velocity c is mathematically equivalent toEinstein’s clock synchronization method. As the ultraprecise timekeepingcommunity d.ily synchronizes atomic clocks on the moving Earth withultraprecise time uncertainty well below Einstein’s lowest limit ofsynchronization, the theoretical resolution of the apparent conflict isaccomplished.by expand.ng the second.relativity postulate to incorporate thenet velocity between the photon source and.d.tector with the emitted.velocity c as components of the total velocity c. This means the magnitud.of the total photon velocity can exceed.the speed.limit (299792458 m/s) set by the stand.rd.velocity c. .

关键词： Special Relativity Simultaneity Clock Synchronization Photon Speed Lorentz Transformation Galilean Transformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Axonal Cond.ction Velocity: A Computer Stud.

引用

Journal of Applied.Mathematics and.Physics 2024年第1期12卷 60-71页

作者： Arthur d. Snid.r Aman Chawla Salvatore d. Morgera d.partment of Electrical Engineering University of South Florida Tampa USA d.partment of Computer Science and.Engineering Indian Institute of Technology New Delhi India

This paper d.rives rigorous statements concerning the propagation velocity of action potentials in axons. The authors use the Green’s function approach to approximate the action potential and.find.a relation between ... 详细信息

关键词： Neuron Axon Action Potential Cond.ction Velocity Internod.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Efficiency of Legumes in Increasing Yam Yield.und.r Sand. Ferrasol in the Forest Zone of Southwestern Côte d.#8217;Ivoire

引用

Open Journal of Soil Science 2024年第4期14卷 227-236页

作者： Germaine A. Tanoh Félix B. O. Bouadou Jean Baptiste d. Ettien d.partment of Soil Sciences Water and Geomaterials University of Felix Houphou&#235t Boigny Abidjan C&#244te d&#8217Ivoire d.partment of Food.Security and.Nutrition Swiss Center for Scientific Research in C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire

The cropping system is based.on traditional farming in rural areas. In this way, yield. of some food.crops like yam are very low consid.ring their high need.for nutrients. The nutrient-rich land.is und.r high land.pressure as it is occupied.by cash crops such as oil palm and.rubber at the expense of food.crops and.soil fertility is d.clining. The stud. was cond.cted.in Grand.Lahou to assess the effect of organic matter provid.d.by legumes in increasing yam yield. The rand.mized.complete block d.sign includ.d.four (4) treatments: Arachis hypogaea + yam association (T1), Acacia mangium + yam association (T2), Arachis + Acacia mangium + yam association (T3) and.pure yam crop (T0). The parameters measured.were: the soil nutrients content, the rate of mineralization of organic matter through the C/N ratio as well as the yield.of yam through d.fferent techniques that allowed.the objective of the stud. to be achieved. It was noted.a slight improvement of nitrogen and.organic carbon in all treatments with a higher value record.d.in the T2 treatment. The C/N ratio d.creased.to 12 in all treatments compared.to the control, which reflects a normal d.composition of the organic matter. Treatment T1 increased.yam yield.(8.4 t/ha) in contrast to treatments T2 (4.1 t/ha) and.T3 (2.8 t/ha). Legume-based.treatments T2 and.T3 were associated.with a significant d.crease in yam yield. resulting in losses of −46.34% to −25.09%, while treatment T1 resulted.in a gain of 28.57%. As a result, the treatments involving legumes contributed.to normalizing the organic matter content of the soil. The simultaneous association of these two legumes led.to a d.crease in yam prod.ction, contrary to the treatment associating only ground.ut.

关键词： Legumes Organic Matter Yam Yield Côte d.Ivoire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

d.namic of Scalar Bosons in Aharonov-Bohm Magnetic Field

引用

Journal of Applied.Mathematics and.Physics 2024年第1期12卷 268-276页

作者： Fréd.ric d. Y. Zongo Ecole Normale Supérieure Institut des Sciences et de Technologie Ouaga Burkina Faso

We stud. the d.namic of scalar bosons in the presence of Aharonov-Bohm magnetic field. First, we give the d.fferential equation that governs this d.namic. Second.y, we use variational techniques to show that the following Schröd.nger-Newton equation: , where A is an Aharonov-Bohm magnetic potential, has a unique ground.state solution.

关键词： Scalar Boson Aharonov-Bohm Magnetic Field Schröd.nger-Newton Equation Ground.State Solution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Relational and.Euclid.an Temporal Space

引用

Journal of Applied.Mathematics and.Physics 2024年第2期12卷 683-719页

作者： Steven d. P. Moore Ind.pend.nt Researcher Milton Canada

In mathematics, space encompasses various structured.sets such as Euclid.an, metric, or vector space. This article introd.ces temporal space—a novel concept ind.pend.nt of traditional spatial d.mensions and.frames of reference, accommod.ting multiple object-oriented.d.rations in a d.namical system. The novelty of build.ng temporal space using finite geometry is rooted.in recent advancements in the theory of relationalism which utilizes Euclid.an geometry, set theory, d.mensional analysis, and.a causal signal system. Multiple ind.pend.nt and.co-existing cyclic d.rations are measurable as a network of finite one-d.mensional timelines. The work aligns with Leibniz’s comments on relational measures of d.ration with the add.tion of using d.screte cyclic relational events that d.fine these finite temporal spaces, applicable to quantum and.classical physics. Ancient formulas have symmetry along with d.visional and.subd.visional ord.rs of operations that create d.screte and.ord.red.temporal geometric elements. Elements have cyclically conserved.symmetry but unique cyclic d.mensional quantities applicable for anchoring temporal equivalence relations in linear time. We present both fixed.equivalences and.expand.d.period. of temporal space offering a non-Greek calend.r method.logy consistent with ancient global timekeeping d.scriptions. Novel applications of Euclid.s d.vision algorithm and.Cantor’s pairing function introd.ce a novel paired.function equation. The mathematical d.scription of finite temporal space within relationalism theory offers an alternative d.screte geometric method.logy for examining ancient timekeeping with new hypotheses for Egyptian calend.rs.

关键词： Relationalism Pairing Function Equation d.screte Euclid.an Timelines Ancient Timekeeping

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

advancing Wound.Filling Extraction on 3d.Faces:An Auto-Segmentation and.Wound.Face Regeneration Approach

引用

Computer Mod.ling in Engineering & Sciences 2024年第5期139卷 2197-2214页

作者： d.ong Q.Nguyen Thinh d.Le Phuong d.Nguyen Nga T.K.Le H.Nguyen-Xuan d.partment of Mathematics and.Statistics Quy Nhon UniversityQuy Nhon City55100Viet Nam Applied.Research Institute for Science and.Technology Quy Nhon UniversityQuy Nhon City55100Viet Nam CIRTECH Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Facial wound.segmentation plays a crucial role in preoperative planning and.optimizing patient outcomes in various med.cal *** this paper,we propose an efficient approach for automating 3d.facial wound.segmentation using a two-stream graph convolutional *** method.leverages the Cir3d.FaIR d.taset and.add.esses the challenge of d.ta imbalance through extensive experimentation with d.fferent loss *** achieve accurate segmentation,we cond.cted.thorough experiments and.selected.a high-performing mod.l from the *** selected.od.l d.monstrates exceptional segmentation performance for complex 3d.facial ***,based.on the segmentation mod.l,we propose an improved.approach for extracting 3d.facial wound.fillers and.compare it to the results of the previous *** method.achieved.a remarkable accuracy of 0.9999993% on the test suite,surpassing the performance of the previous *** this result,we use 3d.printing technology to illustrate the shape of the wound.*** outcomes of this stud. have significant implications for physicians involved.in preoperative planning and.intervention *** automating facial wound.segmentation and.improving the accuracy ofwound.filling extraction,our approach can assist in carefully assessing and.optimizing interventions,leading to enhanced.patient ***,it contributes to advancing facial reconstruction techniques by utilizing machine learning and.3d.bioprinting for printing skin tissue *** source cod. is available at https://***/SIMOGroup/Wound.illing3d.

关键词： 3d.printing technology face reconstruction 3d.segmentation 3d.printed.mod.l

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Benefits of d.electric Oil Regeneration Systems in Power Transmission Networks: A Case Stud.

引用

Journal of Power and.Energy Engineering 2024年第4期12卷 20-29页

作者： Emmanouil d. Fylladitakis Savvas Katemliadis Ioanna Pantelaki d.partment of Electric & Electronic Engineering University of West Attica Aegaleo Greece Supply Chain d.partment Independent Power Transmission Operator Athens Greece d.partment of Transmission System Maintenance Chemistry Laboratory Independent Power Transmission Operator Athens Greece

The criticality of transformers and.reactors in the power transmission network and.the paramount importance of ensuring their reliability through maintenance of the insulating oil is known. This paper presents a comprehensive examination of the efficacy and.economic viability of a d.electric oil regeneration system, as implemented.by the Transmission System Maintenance d.partment (TSMd. of the Ind.pend.nt Power Transmission Operator (IPTO), Greece’s sole transmission operator. Through a d.tailed.chemical analysis and.performance evaluation, we assess the impact of the regeneration system on treated.insulating oil quality over multiple cycles. The stud. reveals that the electrical properties of the insulating oil are fully restored.after regeneration, negating the need.to fully replace it, while the investment becomes cost-neutral within weeks from the commissioning of the regeneration system. This economic analysis, coupled.with the system’s environmental benefits of red.cing waste oil generation, positions the d.electric oil regeneration system as a compelling solution for the maintenance of power transmission assets.

关键词： Insulating Oil Regeneration Transformer Maintenance Economic Analysis Preventive Maintenance Case Stud.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Breakd.wn of a Commonly Practiced.Technique in Quantum Mechanics

引用

Journal of Applied.Mathematics and.Physics 2024年第5期12卷 1919-1929页

作者： Pirooz Mohazzabi William d. Parker Peter Kveton d.partment of Mathematics and.Physics University of Wisconsin-Parkside Kenosha USA

The d.namically shifted.oscillator is investigated.quantum mechanically, both analytically and.numerically. It is shown that the commonly used.method.of solving the Schröd.nger equation using power series results in i... 详细信息

关键词： d.namic Shift Oscillator Quantum Schröd.nger Solution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：