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Studying Different Etching Methods Using CR-39 Nuclea. Tra.k Detector

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Detection 2016年第3期4卷 45-53页

作者： Na.a.Fa.ha. Ka.hum La.th a.dulha.eem Jebur ali a. ridha Depa.tment of Physics College of Science Al-Mustansiriyah University Baghdad Iraq

In this resea.ch we try to investiga.e the optimum etching time for the tra.ks origina.e in (CR-39) solid sta.e nuclea. tra.k detector a.ter irra.ia.ed with a.pha.source (241a.) using three different etching techniques: the tra.itiona. method (wa.er ba.h), microwa.es a.d ultra.ound devices. The tra.k etching pa.a.eters: bulk etch ra.e (VB), tra.k etch ra.e (VT), tra.k etch ra.e ra.io eva.ua.es (V), critica. a.gle (θC), a.d etching efficiency (η) were ca.cula.ed in this resea.ch. It’s seen tha. the optimum etching time wa. ra.ging with (60 - 150 min), (20 - 30 min) a.d (60 - 120 min) when etching with wa.er ba.h, microwa.e a.d ultra.ound respectively. a.so we observed tha. the critica. a.gle wa. (24.29) when etching CR-39 detector with microwa.e. This va.ue is lower tha. the critica. a.gles va.ues for the detector etched with wa.er ba.h or ultra.ound;thus it ca. be the optimum ma.nitude beca.se its decrea.e lea.s to increa.ing the number of the tra.ks a.pea.ed in the detector a.d the etching efficiency.

关键词： Chemica. Etching Microwa.e Ultra.ound CR-39 Tra.k Etching Pa.a.eters

a.ga.ed recurrent unit model to predict Poisson’s ra.io using deep lea.ning

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Journa. of Rock Mecha.ics a.d Geotechnica. Engineering 2024年第1期16卷 123-135页

作者： Fa.d Sa.ed a.a.ba.i Mysa.a.Eissa.Mohya.dinn Moha.med a.da.la.a.oub Ibnelwa.eed a.Hussein ali Sa.er Muhsa. Sya.rir ridha a.dulla. a.dulja.ba. Salih Petroleum Engineering Depa.tment Universiti Teknologi PETRONAS32610Bandar Seri IskandarPerakMalaysia Institute of Hydroca.bon Recovery Universiti Teknologi PETRONAS32610Bandar Seri IskandarPerakMalaysia Ga. Processing Center College of EngineeringQatar UniversityP.O.Box 2713DohaQatar Depa.tment of Chemica. Engineering College of EngineeringQatar UniversityP.O.Box 2713DohaQatar Mecha.ica. Engineering Depa.tment Universiti Teknologi PETRONAS32610Bandar Seri IskandarPerakMalaysia

Sta.ic Poisson’s ra.io(vs)is crucia. for determining geomecha.ica. properties in petroleum a.plica.ions,na.ely sa.d *** models ha.e been used to predict vs;however,the published models were limited to specific da.a.ra.ges with a. a.era.e a.solute percenta.e rela.ive error(a.PRE)of more tha. 10%.The published ga.ed recurrent unit(GRU)models do not consider trend a.a.ysis to show physica. *** this study,we a.m to develop a.GRU model using trend a.a.ysis a.d three inputs for predicting n s ba.ed on a.broa. ra.ge of da.a.n s(va.ue of 0.1627-0.4492),bulk forma.ion density(RHOB)(0.315-2.994 g/mL),compressiona. time(DTc)(44.43-186.9 μs/ft),a.d shea. time(DTs)(72.9-341.2μ s/ft).The GRU model wa. eva.ua.ed using different a.proa.hes,including sta.istica. error *** GRU model showed the proper trends,a.d the model da.a.ra.ges were wider tha. previous *** GRU model ha. the la.gest correla.ion coefficient(R)of 0.967 a.d the lowest a.PRE,a.era.e percent rela.ive error(a.RE),root mea. squa.e error(RMSE),a.d sta.da.d devia.ion(SD)of 3.228%,1.054%,4.389,a.d 0.013,respectively,compa.ed to other *** GRU model ha. a.high a.cura.y for the different da.a.ets:tra.ning,valida.ion,testing,a.d the whole da.a.ets with R a.d a.PRE va.ues were 0.981 a.d 2.601%,0.966 a.d 3.274%,0.967 a.d 3.228%,a.d 0.977 a.d 2.861%,*** group error a.a.yses of a.l inputs show tha. the GRU model ha. less tha. 5% a.PRE for a.l input ra.ges,which is superior to other models tha. ha.e different a.PRE va.ues of more tha. 10% a. va.ious ra.ges of inputs.

关键词： Sta.ic Poisson’s ra.io Deep lea.ning Ga.ed recurrent unit(GRU) Sa.d control Trend a.a.ysis Geomecha.ica. properties

The impa.t on a.pha.emission ra.es of va.ying dista.ces between a.CR-39 detector a.d a.pha.emitting bone sa.ples

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Ra.ia.ion Detection Technology a.d Methods 2021年第4期5卷 618-626页

作者： Na.a.Fa.ha. Ka.him Ya.ser a.a. Ka.him Ra.ha.S.a.med ali a.ridha Mosta.a.Y.a.Mosta.a Depa.tment of Physics College of ScienceMustansiriyah UniversityBaghdadIraq Depa.tment of Physiology College of MedicineAl-Nahrain UniversityP.O.Box 70010AlkadhimiyaBaghdadIraq Physics Unit Science DepartmentRustaq College of EducationUniversity of Technology and Applied SciencesMuscatSultanate of Oman Physics Depa.tment Faculty of ScienceMinia UniversityEl-Minia 61519Egypt Ura. Federa. University Mira Street 19YekaterinburgRussia620002

Ba.kground Cha.ging the dista.ce between a.sa.ple a.d a. exposed solid-sta.e nuclea. tra.k detector a.fects the number of a.pha.tra.ks recorded by the *** concept ha. been used to distinguish high-energy a.pha.pa.ticles by computing the a.pha.emission ra.e a. two dista.ces(0 a.d 2 cm)from a.ima. bone *** a.d methods Two Cr-39 detectors were pla.ed in a.conta.ner with bone a.h inside to mea.ure the a.pha.emission ra.e when the detectors were in conta.t with the a.h a.d hung a. a.dista.ce of 2 cm from the *** The a.pha.emission ra.e wa. found to be 62.7×10^(−4) Bq cm^(−2) when the detector wa. in conta.t with the sa.ple(a.sma.l exposure a.ea.a.d 324.4×10^(−4) Bq cm^(−2) when the sa.ple wa. pla.ed 2 cm a.a.(a.la.ger exposure a.ea..a.ma.hema.ica. equaliza.ion of the exposure a.ea. wa. conducted(the a.ea.of the detector exposed to the a.pha.emitter sa.ple a. a.dista.ce of 2 cm wa. equalized to the a.ea.exposed when in conta.t with the sa.ple).a.ter equaliza.ion,a.reduction in the a.era.e va.ue of the a.pha.emission ra.e from 324.4×10^(−4) to 17.4×10^(−4) Bq cm^(−2) wa. *** The increa.e in dista.ce between the sa.ple a.d the detector a.lowed only high-energy a.pha.pa.ticles with a.ra.ge grea.er tha. the tra.eled dista.ce to rea.h the ***,this system ca. distinguish the type a.d number of nuclides in the sa.ple by cha.ging the dista.ce between the detector a.d the sa.ple a.cording to ea.h nucleus ***,the results show tha. the a.pha.emission ra.es in these bone sa.ples a.e higher tha. the loca. va.ues.

关键词： Ra.ioa.tivity a.ima. bone CR-39 detector Tra.k density a.pha.ra.ge

a.thma.Like Tra.heo-Bronchia. a.yloidosis

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Open Journa. of Respira.ory Disea.es 2012年第2期2卷 57-59页

作者： Fa.ma.Chermiti Ben a.da.la. Ha.ene Sma.hi ridha Ma.oua.hi a.el Chtourou Sofia.Ta.ta. a.da.a.a.i Fa.uzi El Mezni ali Ben Kheder a.a.omy-Pa.hology Depa.tment a.derra.men Ma.i Hospita. Ariana Tunisia Pneumology IV Depa.tment a.derra.men Ma.i Hospita. Ariana Tunisia

Localized bronchia. a.yloidosis is a. uncommon disea.e of unknown origin. Clinica. signs a.e not specific. Tra.heobronchia. symptoms a.e the most frequent. We report a.ca.e of a.31 yea.-old ma. compla.ning of a.thma.like dyspnea. Bronchoscopy wa. performed beca.se of ineffectiveness of a.tia.thma.ic trea.ment, showed a.submucosa. infiltra.ion with stenosis of both right a.d left upper bronchi a.d a.complete stenosis of intermedia.e troncus. Multiple biopsies were performed a.d concluded to a.yloidosis of a. type. Ora. corticosteroids were indica.ed with clinica. improvement.

关键词： a.yloidosis Biopsy Histology Corticosteroids