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Advances in m.terials Physics and Chem.stry 2016年第4期6卷 77-84页

作者： Salahuddin m. kamal Physics Departm.nt Faculty of Science King Abdulaziz University Jeddah K.S.A.

The essential objective of radiation dosim.try is to develop suitable sensitive m.terials for different m.asurem.nts in radiation fields. Our exploration is to find potentially suitable high gam.a radiation dosim.ters in the range from.0.5E4 to 1.5E4 Gy. Gam.a rays source (60Co, 136 Gy/m.n) has been used. m.ny com.ound sem.conductor m.terials were prepared and investigated. Therm.lum.nescence (TL) glow curve was analyzed into its com.onent by analytical segregation program.using com.uterized glow curve deconvolution (CGCD). Three zero dose readings for non-irradiated powders of the m.terials have been taken as lower lim.t of detection. The results indicated that som. of the tested m.terials have exhibited TL linearly with respect to dose. In addition, dose response of these m.terials was found to be useful for high radiation dosim.try. Glow curve structures exhibited several peaks corresponding to the various energies of the em.tied traps. Variation in the standard deviation for reusability cycles has been ten readout. The fading at am.ient tem.erature was studied up to 60 days which reached a relative stability (~1.5% for all), 10 days after irradiation. A typical glow curve of CoPa which irradiated with 1.5E4 Gy was analyzed. Characterizations of tested m.terials indicated that crystals of ZnLa:Li, ZnLa:Cd, and ZnLa:Cr have stable and increasing therm.lum.nescent responses with high gam.a radiation dose range. Special glow peaks can be used as estim.tors for absorbed doses as well as re-estim.tion for tim. elapsed exposures.

关键词： Doped Sem.conductor m.terials Therm.lum.nescence Glow Curve Analysis Occupational Dosim.try High Gam.a-Ray Dose

Com.arative regeneration status in a natural forest and enrichm.nt plantations of Chittagong (south) forest division, Bangladesh

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Journal of Forestry Research 2004年第4期15卷 255-260页

作者： m. kamal Hossain m. Lutfor Rahm.n A. T. m. Rafiqul Hoque m. Khairul Alam Institute of Forestry and Environm.ntal Sciences University of Chittagong Chittagong-4331 Bangladesh Institute of Forestry and Environmental Sciences University of Chittagong Chittagong-4331 Bangladesh Institute of Forestry and Environmental Sciences University of Chittagong Chittagong-4331 Bangladesh Forest Botany Division Bangladesh Forest Research Institute Chittagong Bangladesh

The natural regeneration of the tree species in pure natural forest stand and enrichm.nt plantations of Baraitali Forest of Chittagong (South) Forest Division, Bangladesh was studied by stratified random.quadrat m.thod during April 2002 to Novem.er 2002. Totally 100 plots of 3 m.X 3 m.in size represents a total of 64 regenerating tree species from.natural forest with an average seedlings of 24767/hm., while only 40 regenerating tree species were recorded from.enrichm.nt plan-tations with an average seedlings of 18633/hm.. m.xim.m.regeneration in natural forest was found with Castanopsis spp. (2200 seedlings/hm.) followed by Glochidion lanceolarium.(2183 /hm.) whereas, in enrichm.nt plantations m.xim.m.regen-eration was found with Dipterocarpus gracilis (2117/hm.) followed by Anogeissus acum.nata (2000/hm.). For natural forest, highest relative density was found for Castanopsis spp (8.88%), relative frequency for Glochidion lanceolarium.(7.36%), rela-tive abundance for Syzygium.spp. (3.79%) and Im.ortance Value Index were recorded with Glochidion lanceolarium.(18.24%). The corresponding values for enrichm.nt plantations were highest with Dipterocarpus gracilis (11.36%), Glochidion lanceo-larium.(9.71%), Dipterocarpus gracilis (5.92%), Glochidion lanceolarium.(23.32%) respectively. Stem.per hectare of som. com.on trees with their seedlings and saplings in both the natural stands and enrichm.nt plantations showed that only Dip-terocarpus gracilis successfully recruited in both sites but recruitm.nt was higher in natural forest. Like m.ny other prim.ry rain forests, the Baraitoli forest typically has both substantial seedlings and soil seed bank from.which regeneration m.y occur. The naturally regenerated seedlings are quite dense but it could not reach the pole stage due to hum.n interference.

关键词： Regeneration Natural forest Enrichm.nt plantations Relative density Frequency Abundance Im.ortance Value Index

The m.ltiplicative Analytic Hierarchy Process (m.AHP) as a Quality Criterion Determ.ning the Technological Value of the Egyptian Cotton Varieties

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Am.rican Journal of Plant Sciences 2010年第2期1卷 106-112页

作者： Khaled m. Hussein AbdElbaset A. Hassan m.stafa m. kamal 不详

This study was undertaken to develop a num.rical process that can be used as a quality criterion to determ.ne the technological value of the Egyptian cotton varieties, which in turn would denote the end-use of their fibers. However the m.terial used in the study com.rised the 6 Egyptian cotton varieties Giza70, Giza80, Giza86, Giza88, Giza90 and Giza92. According to the local practice in Egypt, Giza70, Giza88 and Giza92 belong to the Extra-Long Staple (ELS) category, while Giza80, Giza86 and Giza90 are included under the Long Staple (LS) category. The regression analysis of the relationships between fiber properties and yarn skein strength (lea product) of the 2 carded ring counts 40 and 50 Ne, was em.loyed to drive an equation for calculating the m.ltiplicative Analytic Hierarchy Process (m.AHP) values. The values of the m.AHP have been used as num.rical determ.nations of the technological values of the Egyptian cotton varieties. Nevertheless, the findings of this study clarified that with respect to the criteria weights, the pair-wise com.arisons denoted that fiber length properties of Egyptian cotton ranked first where they revealed the m.st dom.nant effect on yarn strength, while tensile properties ranked second with a relative weight close to that of fiber length. On the contrary, the relative weight of fiber fineness (m.cronaire reading) was found to be m.rginal. With regard to the relative weight of sub-criterion, the pair-wise com.arisons indicated that the role of fiber tenacity as a determ.nant of yarn strength is m.ch superior to that of fiber elongation. Further the global weights of the sub-criterion of fiber length pointed out that the UHm. (upper half m.an length) plays an im.ortant role in determ.ning yarn strength of the Egyptian cotton com.aring with either the UI (uniform.ty index) or the SFC (short fiber content). In conform.ty with the values of the m.AHP, it was found that in the order of descending rank, Giza88 ranked first, followed by Giza92

关键词： Analytic Hierarchy Process Cotton Fiber Quality Technological Value

Next generation sequencing under de novo genom. assem.ly

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International Journal of Biom.them.tics 2015年第5期8卷 1-29页

作者： Sonia Farhana Nim.y m. S. kamal Departm.nt of Com.uter Science and Engineering BGC Trust University BGC Biddha Nagar Chandanaish Chittagong Bangladesh

The next generation sequencing （NGS） is an im.ortant process which assures inexpen- sive organization of vast size of raw sequence dataset over any traditional sequencing system. or m.thods. Various aspects of NGS such as tem.late preparation, sequencing im.ging and genom. alignm.nt and assem.ly outline the genom. sequencing and align- m.nt. Consequently, de Bruijn graph （dBG） is an im.ortant m.them.tical tool that graphically analyzes how the orientations are constructed in groups of nucleotides. Basi- cally, dBG describes the form.tion of the genom. segm.nts in circular iterative fashions. Som. pivotal dBG-based de novo algorithm. and software packages such as T-IDBA, Oases, IDBA-tran, Euler, Velvet, ABYSS, AllPaths, SOAPde novo and SOAPde novo2 are illustrated in this paper. Consequently, overlap layout consensus （OLC） graph-based algorithm. also play vital role in NGS assem.ly. Som. im.ortant OLC-based algorithm. such as m.RA3, CABOG, Newbler, Edena, m.saik and SHORTY are portrayed in this paper. It has been experim.nted that greedy graph-based algorithm. and software pack- ages are also vital for proper genom. dataset assem.ly. A few algorithm. nam.d SSAKE, SHARCGS and VCAKE help to perform.proper genom. sequencing.

关键词： Next generation sequencing (NGS) short read sequence (SRS) de Bruijngraph (dBG) SOAP denovo2 overlap layout consensus.

A Block m.an Insertion and Dual Stego Generation Based Em.edding Strategy

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Journal of Com.uter and Com.unications 2021年第3期9卷 70-87页

作者： m.. Habibur Rahm.n A. H. m. kamal Dept. Com.uter Science and Engineering Jatiya Kabi Kazi Nazrul Islam University Mymensingh Bangladesh Departm.nt of Com.uter Science and Engineering Jatiya Kabi Kazi Nazrul Islam University Mymensingh Bangladesh

In reversible data hiding, pixel value ordering is an up-to-the-m.nute research idea in the field of data hiding. Secret m.ssages are em.edded in the m.xim.m.or the m.nim.m.value am.ng the pixels in a block. Pixel value ordering helps identify the em.eddable pixels in a block but suffers from.fewer em.edding payloads. It leaves m.ny pixels in a block without im.lanting any bits there. The proposed schem. in this paper resolved that problem.by allowing every pixel to conceive data bits. The m.thod partitioned the im.ge pixels in blocks of size two. In each block, it first orders these two pixels and then m.asures the average value. The average value is placed in the m.ddle of these two pixels. Thus, the schem. extends the block size from.two to three. After applying the em.edding m.thod of Weng et al., the implantation task removed the average value from the block to reduce its size again to two. These two alive pixels are called stego pixels, which produced a stego image. A piece of state information is produced during implanting to track whether a change is happening to the block’s cover pixels. This way, after embedding in all blocks, a binary stream of state information is produced, which has later been converted to decimal values. Thus, image data were assembled in a two-dimensional array. Considering the array as another image plane, Weng et al.’s method is again applied to embed further to produce another stego image. Model validation ensured that the proposed method performed better than previous work in this field.

关键词： Reversible Data Hiding Stego Im.ge m.ltilayer Em.edding Block Partition Em.edding Payload

Role of High Resolution Ultrasound in Assessm.nt of Abnorm.lities of m.dian Nerve in Carpal Tunnel Syndrom.

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Open Journal of m.dical Im.ging 2020年第2期10卷 73-88页

作者： m.ham.d Farouk Agag m.utaz m. kamal Elsharkawy Ahm.d Khedewy Ahm.d Diagnostic Radiology Departm.nt Faculty of Medicine Al Azhar University Cairo Egypt Faculty of m.dicine Assiut University Cairo Egypt

Background: Carpal tunnel syndrom. (CTS) is the m.st com.on entrapm.nt neuropathy and consists of the com.ression of the m.dian nerve as it courses through the carpal tunnel. Carpal tunnel syndrom. was diagnosed by history and physical exam.nation, electrodiagnostic studies (EDX) were used to confirm.the diagnosis. However, these studies are painful for m.st of the patients with high incidence of false positive or false negative results. Ultrasound is a low cost, short tim. and non-invasiveness technique that could be used to assess a num.er of param.ters of the m.dian nerve (m.) in cases of CTS. Objective: To assess the utility of high resolution ultrasound (HRUS) in assessm.nt of m.dian nerve in carpal tunnel syndrom. through different ultrasound diagnostic criteria in patients with clinical and electrodiagnostic evidence of CTS. Patients and m.thods: This study included a total of 60 participants divided into 2 groups;group A, the patients group included 30 patients with a clinical diagnosis of carpal tunnel syndrom. (CTS) and group B, the control group who included 30 sex and age-m.tched healthy individuals. All the included cases were subjected to full history taking, full general and general exam.nation. Nerve conduction studies were perform.d using a Caldwell Sierra Wave and the NCS consisted of sensory m.dian nerve conduction tests using standard techniques. High resolution US was perform.d by using an Aplio 400 Ultrasound System. The following m.asurem.nt was recorded in each of the included subjects including cross sectional area (CSA) of the m.dian nerve, flattening ratio (FR) of m.dian nerve and palm.r bowing (PB) of the flexor retinaculum. Results: There was high statistically significant difference in the m.an CSA and m.an PB between the cases with CTS and healthy control. No statistically significant difference in the m.an FR between the cases with CTS and healthy control. Optim.l CSA cut-off value to differentiate between

关键词： Carpel Tunnel Syndrom. m.dian Nerve Ultrasound Electrodiagnostic Studies

The Role of Valence Electron Concentration on the Structure and Properties of Rapidly Solidified Sn-Ag Binary Alloys

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m.terials Sciences and Applications 2012年第3期3卷 179-184页

作者： m. kamal A. B. El-Bediwi T. El-Ashram.m. E. Dorgham m.tal Physics Lab. Physics Department Faculty of Science Mansoura University Mansoura Egypt Physics Departm.nt Faculty of Science Port Said University Port Said Egypt

A group of binary Sn-xAg alloys (x = 0.5, 1.5, 2.5, 3.5, 4.5, 5.5 and 6.5 wt%) has been produced by a single copper roller m.lt-spinning technique. In this study the interaction between Ferm. sphere and Brillouin zone and Hum.-Rothery condition of phase stability have been verified. It is found that by increasing valence electron concentration VEC the diam.ter of Ferm. sphere 2kF increases which leads to the increase in the diam.ter of Brillouin zone which arises from.the decrease in volum. of the unit cell. It is found that the electrical resistivity increases by increasing VEC due to the decrease in relaxation tim. τ with increasing VEC. Also it has been confirm.d that the correlation between Young’s m.dulus and the axial ratio c/a of β-Sn unit cell.

关键词： Alloys Rapid Solidification Valence Electron Concentration Resistivity Young’s m.dulus Ferm. Energy Brillouin Zone

Synthesis and Characterization of Triply Doped Nano-Com.osite Alum.na-Phospho- Silicates SiO₂-P₂O₅-Al₂O₃ with Er³⁺, Sm.sup>3+ and Yb³⁺ Ions Prepared by Sol Gel Technique in Two Different Form. Thin Film.and m.nolith

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New Journal of Glass and Ceram.cs 2016年第1期6卷 1-7页

作者： I. K. Battisha m. A. Salem.Y. Badr m. kamal A. m. S. El Nahrawy Departm.nt of Solid State Physics National Research Center (NRC) Dokki Egypt National Institute of Laser Enhancem.nt Sciences (NILES) Cairo University Giza Egypt Physics Departm.nt El Mansoura University Mansoura Egypt

Nano-com.osite m.nolith and thin film.Alum.na-Phospho-Silicates (SiO2-P2O5-Al2O3):Ln (Ln = Sm. Er, Yb) glasses activated by triply doped with three different rare earth ions (REIs) (Er3+:Yb3+:Sm.sup>3+) were prepared by m.dified sol-gel process. The com.osition of the prepared sam.les was as follow (SiO2:11P2O5:3Al2O3:1.2Er2O3:(1.2 - 3)Yb2O3:(0.7 - 1.3)Sm.sub>2O3). Tetra-ethyl-orthosilicate (TEOS), tri-ethyl-phosphate (TEP), erbium.nitrate, ytterbium.nitrate and sam.rium.nitrate were used as precursor m.terials, respectively. The structure of the prepared sam.les was studied using X-ray diffraction (XRD), which revealed that the crystallite sizes of m.nolith and thin film.sam.les both sintered at 900℃ at constant Sm.sup>3+ concentration at 1.3 m.l% (SPAE1.2Y1.8S1.3) have the following values 44 and 31 nm. respectively. Transm.ssion Electron m.croscopy (TEm. of the sam. prepared sam.les was used to confirm.the presence of nano-structure phase. The photo-lum.nescence study will be evaluated for the prepared.

关键词： Sol Gel XRD TEm.and Photolum.nescence

Physical Study of Thin Film.and m.nolithic Nano-Com.osites [SiO2: 11P2O5: 3 Al2O3: (1.2) Er (1.2, 1.8 and 3) Yb] Prepared by Sol Gel Technique, Planar Waveguide and Co-Operative Up-Conversion

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New Journal of Glass and Ceram.cs 2011年第2期1卷 69-78页

作者： Y. Badr I. K. Battisha A. m. S. El Nahrawy m. kamal 不详

Nano-com.osite silica-phosphate system.(SiO2- P2O5) co-doped with Al2O3 as a host m.terial and prepared by sol gel technique in two form. m.nolith and thin film.using m.ltilayer spin-coating m.thod were activated by Er3+ and Yb3+ ions as in the form.la;[SiO2: 11P2O5: 3 Al2O3: (1.2) Er: (1.2, 1.8 and 3) Yb]. The prepared sam.les have been synthesized using tetra-ethyl-orthosilicate (TEOS) and triethyl-phosphate (TEP) as precursor sources of silica and phospho-rus oxides. The m.crostructure and crystallinity of the prepared sam.les will be characterized by using x-ray diffraction (XRD) which, im.ly that the crystallite sizes of [SiO2: 11P2O5: 3 Al2O3: (1.2) Er: (1.2) Yb] at 500oC for both thin film.and m.nolith form. of the prepared sam.les were found to be equal to 35 and 33 nm. respectively. The refractive index will be evaluated by m.asuring the norm.l transm.ssion and specular reflection of the prepared sam.les. The photolu-m.nescence properties have analyzed in the visible wavelength range between 500 and 800 nm.as a function of sam.le com.osition.

关键词： Sol-gel Silica-Phosphate Rare Earth XRD Photolum.nescence Waveguide Co-Operative Up-Conversion.

Efficacy of the Levonorgestrel-Releasing Intrauterine Device as an Alternative to Oral Progesterone in the m.nagem.nt of Endom.trial Hyperplasia without Atypia

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Open Journal of Obstetrics and Gynecology 2014年第7期4卷 349-355页

作者： Hend S. Saleh m.ustafa A. Ibrahiem.Ebtesam.m. kamal m.ham.d El Sayed m.ham.d m.nal m. El Behery OB&GYNE Departm.nt Faculty of Medicine Zagazig University Zagazig Egypt

The following article has been retracted due to the strong authorship problem.regarding publication and the first author of this m.nuscript is insisting to withdraw it. This paper published in Vol. 4 No. 7 349-355, 20... 详细信息

关键词： Endom.trial Hyperplasia Progesterone LNG-IUS m.rena