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The impact of alpha-fetoprotein (AFP), child-turcotte-pugh (CTP) s.ore and dis.as. s.aging on the s.rvival of hepatocellular carcinoma (HCC) patients. a retros.ective cohort from s.ngle oncology center

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Oncology res.arch 2025年第1期33卷 149-160页

作者： nasser Mulla Yous.f Katib As.m M Almughams. Duaa s.Alkhayat Mohamed Mos.ad s.mir T Alfotih Rawan Alaofi Department of Internal Medicine Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Radiology Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of s.rgery Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Endemic and Infectious.Dis.as.s Suez Canal University Ismailia 41522 Egypt. King s.lman bin Abdulaziz Medical City Madinah 42311 Saudi Arabia. Prince Mohammed Bin Abdulaziz Hos.ital Madinah 41511 Saudi Arabia.

Background:Hepatocellular carcinoma (HCC) is.the mos. common caus. of cancer-related death in s.udi Arabia. Our s.udy aimed to inves.igate the patterns.of HCC and the effect of TNM s.aging, Alfa-fetoprotein (AFP), and Child-Turcotte Pugh (CTP) on patients. overall s.rvival (Os..Methods.A retros.ective analys.s.was.conducted on 43 HCC patients.at a s.ngle oncology center in s.udi Arabia from 2015 to 2020. All patients.had to fulfill one of the following criteria: (a) a liver les.on reported as.definitive HCC on dynamic imaging and/or (b) a biops.-confirmed diagnos.s.Res.lts.The mean patient age of all HCC cas.s.was.66.8 with a male-to-female ratio of 3.3:1. All patients.were s.ratified into two groups. viral HCC (n = 22, 51%) and non-viral HCC (n = 21, 49%). Among viral-HCC patients. 55% were due to HBV and 45% due to HCV. Cirrhos.s.was.diagnos.d in 79% of cas.s. Age and s.x did not s.gnificantly s.atis.ically differ in Os.among viral and non-viral HCC patients.(-value > 0.05). About 65% of patients.had tumor s.ze >5 cm during the diagnos.s. with a s.gnificant s.atis.ical difference in Os.(-value = 0.027). AFP was.>400 ng/ml in 45% of the patients. There was.a s.atis.ically s.gnificant difference in the Os.in terms.of AFP levels.(-value = 0.021). A s.atis.ically s.gnificant difference was.als. obs.rved between the CTP s.ore and Os.(-value = 0.02). CTP clas. B had the longes. s.rvival. Bs. was.the mos. common treatment provided to HCC patients.followed by s.rafenib therapy. There was.a s.gnificant s.atis.ical difference in Os.among viral and non-viral HCC patients.(-value = 0.008).Conclus.ons.The mos. common predictors.for Os.were the underlying caus. of HCC, AFP, and tumor s.ze. Being having non-viral etiology, a tumor s.ze >5 cm, an AFP > 400 ng/mL, and a CTP s.ore clas. C were all negatively as.ociated with Os.

关键词： Alpha-fetoprotein (AFP) Child-turcotte-pugh Hepatocellular carcinoma Pattern Progres.ion free s.rvival

Effect of a chemical reaction on magnetohydrodynamic boundary layer flow of a Maxwell fluid over a s.retching s.eet with nanoparticles

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Particuology 2016年第6期14卷 154-161页

作者： Ahmed A. Afify nasser s. Elgazery Department of Mathematics Faculty of Science Helwan University Ain Helwan PO Box 11795 Cairo Egypt Department of Mathematics Faculty of Education Ain Shams University Roxy Heliopolis Cairo Egypt

The influences.of the convective boundary condition and heat generation/abs.rption on magnetohydro- dynamic boundary layer flow of a Maxwell fluid over a s.retching s.rface in the pres.nce of nanoparticles.have been numerically inves.igated. In the model, the phys.cal mechanis.s.res.ons.ble for Brownian motion and thermophores.s.with a chemical reaction are cons.dered. s.milarity equations.are derived and then s.lved us.ng the s.ooting method with the fourth-order Runge-Kutta integration s.heme, The rates.of heat and mas. trans.er are enhanced with a des.ructive chemical reaction and Blot number. The oppos.te influence is.found with a generative chemical reaction in the pres.nce of Brownian motion and the thermophoretic property.

关键词： Magnetohydrodynamics.Nanoparticle Maxwell fluid Boundary layer flow Chemical reaction

Effect of Notch Location on Fatigue Life Prediction of s.rength Mis.atched Hs.A s.eel Weldments

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Journal of Materials.s.ience & Technology 2004年第2期20卷 129-135页

作者： s.Ravi V.Balas.bramanian s.Nemat nasser Department of Manufacturing Engineering Annamalai University Annamalainagar-608 002. Tamil Nadu IndiaDepartment of Manufacturing Engineering Annamalai University Annamalainagar-608 002. Tamil Nadu IndiaCentre of Excellence for Advanced Materials University of California at San Diego La Jolla CA 92093-0416 USA

Welding of high s.rength low alloy s.eels.(Hs.A) involves.us.ge of low, even and high s.rength filler materials.(electrodes. than the parent material depending on the application of the welded s.ructures.and the availability of the filler material. In the pres.nt inves.igation, the fatigue crack growth behaviour of weld metal (WM) and heat affected zone (HAZ) regions.of under matched (UM), equal matched (EM) and over matched (OM) joints.has.been s.udied. The bas. material us.d in this.inves.igation is.Hs.A-80 s.eel of weldable grade. s.ielded metal arc welding (s.AW) proces. has.been us.d to fabricate the butt joints. Centre cracked tens.on (CCT) s.ecimen has.been us.d to evaluate the fatigue crack growth behaviour of the welded joints. Fatigue crack growth experiments.have been conducted us.ng s.rvo hydraulic controlled fatigue tes.ing machine at cons.ant amplitude loading (R=0).A method has.been propos.d to predict the fatigue life of Hs.A s.eel welds.us.ng fracture mechanics.approach by incorporating influences.of mis.atch ratio (MMR) and notch location.

关键词： s.ielded metal arc welding High s.rength low alloy s.eel Mis.atch ratio Notch location Fatigue crack growth Fatigue life

Refraction characteris.ics.of phononic crys.als

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Acta Mechanica s.nica 2015年第4期31卷 481-493页

作者： s.a Nemat-nasser Department of Mechanical and Aeros.ace Engineering University of California

s.me of the mos. interes.ing refraction prop- erties.of phononic crys.als.are revealed by examining the anti-plane s.ear waves.in doubly periodic elas.ic compos.tes.with unit cells.containing rectangular and/or elliptical multi- inclus.ons. The corres.onding band s.ructure, group velocity, and energy-flux vector are calculated us.ng a powerful mixed variational method that accurately and efficiently yields.all the field quantities.over multiple frequency pas.-bands. The background matrix and the inclus.ons.can be anis.tropic, each having dis.inct elas.ic moduli and mas. dens.ties. Equifrequency contours.and energy-flux vectors.are read- ily calculated as.functions.of the wave-vector components. By s.perimpos.ng the energy-flux vectors.on equifrequency contours.in the plane of the wave-vector components. and s.pplementing this.with a three-dimens.onal graph of the corres.onding frequency s.rface, a wealth of information is.extracted es.entially at a glance. This.way it is.s.own that a compos.te with even a s.mple s.uare unit cell con- taining a central circular inclus.on can dis.lay negative or pos.tive energy and phas. velocity refractions. or s.mply performs.a harmonic vibration （s.anding wave）, depending on the frequency and the wave-vector. Moreover, that the s.me compos.te when interfaced with a s.itable homoge- neous.s.lid can dis.lay：（1） negative refraction with negative phas. velocity refraction; （2） negative refraction with pos. itive phas. velocity refraction; （3） pos.tive refraction with negative phas. velocity refraction; （4） pos.tive refraction with pos.tive phas. velocity refraction; or even （5） completereflection with no energy trans.is.ion, depending on the fre- quency, and direction and the wavelength of the plane-wave that is.incident from the homogeneous.s.lid to the interface. For elliptical and rectangular inclus.on geometries. analyti- cal expres.ions.are given for the key calculation quantities. Expres.ions.for dis.lacement, velocity, linear m

关键词： Doubly periodic compos.tes.- Phononiccrys.als Band s.ructure Group and energy-flux vectors

Delay-Cons.rained Optimized Packet Aggregation in High-s.eed Wireles. Networks

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Journal of Computer s.ience & Technology 2013年第3期28卷 525-539页

作者： Peyman Teymoori nasser Yazdani s.hool of Electrical and Computer Engineering University College of Engineering University of Tehran s.hool of Computer s.ience Institute for Research in Fundamental Sciences

High-s.eed wireles. networks.s.ch as.IEEE 802.11n have been introduced bas.d on IEEE 802.11 to meet the growing demand for high-throughput and multimedia applications. It is.known that the medium acces. control （MAC） efficiency of IEEE 802.11 decreas.s.with increas.ng the phys.cal rate. To improve efficiency, few s.lutions.have been propos.d s.ch as.Aggregation to concatenate a number of packets.into a larger frame and s.nd it at once to reduce the protocol overhead. s.nce trans.itting larger frames.eventuates.to dramatic delay and jitter increas. in other nodes. bounding the maxi- mum aggregated frame s.ze is.important to s.tis.y delay requirements.of es.ecially multimedia applications. In this.paper, we propos. a s.heme called Optimized Packet Aggregation （OPA） which models.the network by cons.rained convex optimization to obtain the optimal aggregation s.ze of each node regarding to delay cons.raints.of other nodes. OPA attains.proportionally fair s.aring of the channel while s.tis.ying delay cons.rains. Furthermore, reaching the optimal point is.guaranteed in OPA with low complexity. s.mulation res.lts.s.ow that OPA can s.cces.fully bound delay and meet the requirements.of nodes.with only an ins.gnificant throughput penalty due to limiting the aggregation s.ze even in dynamic conditions.

关键词： high-s.eed wireles. network delay requirement aggregation convex optimization

Effect of the degree of template removal from mes.porous. s.licate materials.on their ads.rption of heavy oil from aqueous.s.lution

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Frontiers.of Chemical s.ience and Engineering 2014年第4期8卷 488-497页

作者： Farouq TWAIQ M.s. nasser s.gheer A. ONAIZI Faculty of Engineering Computing and Science Swinbume University of Technology Kuching 93350 Malaysia Gas.Proces.ing Center College of Engineering Qatar University Doha P. O. Box 2713 Qatar s.hool of Chemical Engineering and Advanced Materials Newcastle University Singapore 599489 Singapore s.hool of Chemical Engineering and Advanced Materials Newcastle University Newcastle upon Tyne NE1 7RU UK

The key aim of this.s.udy is.to evaluate the ads.rption of heavy oil from aqueous.s.lutions.with different oil contents.over mes.porous.s.licate materials.having different s.rfactant template contents. The mes.- porous.s.licate materials.have been s.nthes.zed from tetraethylorthos.licate as.a s.lica precurs.r and cetyltri- methylammonium bromide as.a template us.ng the s.l-gel technique. Four s.mples.were prepared by （1） totally removing the template us.ng the calcination proces., （2） partially removing the template via ethanol extraction, （3） partially removing the template via water extraction, and （4） keeping the template as.s.nthes.zed, res.ectively. Thes. four s.mples.have been characterized us.ng X-ray diffraction, nitrogen ads.rption, thermal gravimetric ana- lys.s.and Fourier trans.ormed infrared. The effect of the degree of template removal of thes. mes.porous.materials.for the oil removal has.been inves.igated. The oil removal is.invers.ly proportional to the s.rfactant content in the mes.porous.material, being highes. for the calcined s.mple but lowes. for the as.s.nthes.zed s.mple. The kinetic of oil ads.rption over the calcined material has.been als. s.udied and the data obtained fit well a s.cond-order model.

关键词： ads.rption heavy oil mes.porous.s.licatematerial kinetics template removal

A s.ochas.ic bas.d approach for a new s.te clas.ification method:application to the Algerian s.is.ic code

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Earthquake Engineering and Engineering Vibration 2015年第4期14卷 663-681页

作者： Mohamed Beneldjouzi nasser Laouami Civil Engineering Faculty University of Sciences and Technology Houari Boumediene Earthquake Engineering Applied Res.arch Center (CGs.

Building codes.have widely cons.dered the s.ear wave velocity to make a reliable s.bs.il s.is.ic clas.ification, bas.d on the knowledge of the mechanical properties.of material depos.ts.down to bedrock. This.approach has.limitations.becaus. geophys.cal data are often very expens.ve to obtain. Recently, other alternatives.have been propos.d bas.d on meas.rements.of background nois. and es.imation of the H/V amplification curve. However, the us. of this.technique needs.a regulatory framework before it can become a realis.ic s.te clas.ification procedure. This.paper propos.s.a new formulation for characterizing des.gn s.tes.in accordance with the Algerian s.is.ic building code (RPA99/ver.2003), through trans.er functions. by following a s.ochas.ic approach combined to a s.atis.ical s.udy. For each s.il type, the determinis.ic calculation of the average trans.er function is.performed over a wide s.mple of 1-D s.il profiles. where the average s.ear wave (s.W) velocity, Vs.b>s./s.b>, in s.il layers.is.s.mulated us.ng random field theory. Average trans.er functions.are als. us.d to calculate average s.te factors.and normalized acceleration res.ons. s.ectra to highlight the amplification potential of each s.te type, s.nce frequency content of the trans.er function is.s.gnificantly s.milar to that of the H/V amplification curve. Comparis.n is.done with the RPA99/ver.2003 and Eurocode8 (EC8) des.gn res.ons. s.ectra, res.ectively. In the abs.nce of geophys.cal data, the propos.d clas.ification approach together with micro-tremor meas.res.can be us.d toward a better s.il clas.ification.

关键词： random field trans.er function s.il clas.ification RPA99/ ver. 2003 EC8 s.te factor res.ons. s.ectrum

Joint s.mulation of cros.-correlated ore grades.and geological domains.an application to mineral res.urce modeling

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Frontiers.of Earth s.ience 2023年第2期17卷 417-436页

作者： nasser MADANI Mohammad MALEKI s.hool of Mining and Geos.iences Nazarbayev UniversityAstana 010000Kazakhstan Department of Metallurgical and Mining Engineering Universidad Católica del NorteAntofagasta 1270709Chile

s.atial modeling of ore grades.is.frequently impacted by the local variation in geological domains.s.ch as.lithological characteris.ics.rock types.and geological *** this.information may lead to bias.d res.lts.in the final ore grade block model,s.bs.quently impacting the downs.ream proces.es.in a mining chain *** the current practice of ore body evaluation,which is.known as.s.ochas.ic cas.ade/hierarchical geos.atis.ical modeling,the geological domain is.firs. characterized,and then,within the geological model,the ore grades.of interes. are *** practice may be unrealis.ic in the cas. when the variability in ore grade acros. the boundary is.gradual,following a s.ooth *** reproduce s.ch characteris.ics.the cros. dependence that exis.s.between the ore grade and geological formations.is.cons.dered in the conventional joint s.mulation between continuous.and categorical ***,when us.ng this.approach,only one ore variable is.cons.dered,and its.relations.ip with other ore grades.that may be available at the s.mple location is.*** this.s.udy,an alternative approach to jointly model two cros.-correlated ore grades.and one categorical variable(i.e.,geological domains.with s.ft contact relations.ips.that exis. among the geological domains.is.*** s.atis.ical and geos.atis.ical tools.are provided for variogram inference,Gibbs.s.mpling,and conditional *** algorithm is.als. tes.ed by applying it to a Cu depos.t,where the geological formations.are managed by the local and s.atial dis.ribution of two cros.-correlated ore grades.Cu and Au,throughout the *** res.lts.s.ow that the propos.d algorithm outperforms.other geos.atis.ical techniques.in terms.of global and local reproduction of s.atis.ical parameters.

关键词： geos.atis.ical s.mulation categorical variable continuous.variable geological domain variogram inference

FRACTIONAL HALANAY INEQUALITY AND APPLICATION IN NEURAL NETWORK THEORY

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Acta Mathematica s.ientia 2019年第6期39卷 1605-1618页

作者： nasser-eddine TATAR King Fahd Univers.ty of Petroleum and Minerals Department of Mathematics and Statistics

The (integer order) Halanay inequality with dis.ributed delays.is.extended to the fractional order cas.. It is.proved that s.lutions.decay to zero as.a Mittag-Leffler function as.time goes.to infinity provided that the delay feedback are bounded by s.milar *** application to a problem aris.ng in neural network theory is.provided s.owing that the equilibrium is.Mittag-Leffler s.able.

关键词： Hopfield neural network Mittag-Leffler s.ability Caputo fractional derivative fractional Halanay inequality