检索结果-南通市图书馆

A New Generative Mathematical Model for Coverless Steganography System Based on Image Generation

Computers, Materials & Continua 2023年第3期74卷 5087-5103页

作者： Al-hussien Seddik Mohammed Salah Gamal Behery Ahmed El-harby Ahmed ismail Ebada Sokea Teng Yunyoung Nam Mohamed Abouhawwash Department of Computer Science Faculty of ScienceMinia UniversityMiniaEgypt Department of Computer Science Faculty of Computers and Artificial IntelligenceDamietta UniversityNew DamiettaEgypt Department of ICT Convergence Soonchunhyang UniversityAsan31538Korea Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast Lansing48824MIUSA

The ability of any steganography system to correctly retrieve the secret message is the primary criterion for measuring its ***,researchers have tried to generate a new natural image driven from only the secret message bits rather than using a cover to embed the secret message within it;this is called the stego *** paper proposes a new secured coverless steganography system using a generative mathematical model based on semi Quick Response(QR)code and maze game image *** system consists of two *** first component contains two processes,encryption process,and hiding *** encryption process encrypts secret message bits in the form of a semi-QR code image whereas the hiding process conceals the pregenerated semi-QR code in the generated maze game *** the other hand,the second component contains two processes,extraction and decryption,which are responsible for extracting the semi-QR code from the maze game image and then retrieving the original secret message from the extracted semi-QR code image,*** results were obtained using the bit error rate(BER)*** results confirmed that the system achieved high hiding capacity,good performance,and a high level of robustness against attackers compared with other coverless steganography methods.

关键词： Coverless steganography data hiding information security QR code maze game

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

Synthesis of 1,3-Oxazepine Derivatives Derived from 2-(1h-Benzo[d][1,2,3]Triazol-1-yl) Acetohydrazide by Using Microwave Irradiation

引用

International Journal of Organic Chemistry 2017年第3期7卷 219-228页

作者： Nihad ismail Taha Department of Chemistry College of Science Kirkuk University Kirkuk Iraq

A series of Schiff base and their derivative (oxazepine) have been synthesized. 8-hydrazone(schiff-bases) derivatives type (E)-2-(1h-benzo[d][1,2,3]triazole-1-yl)-N-(substituted benzylidene)aceto-hydrazide were prepared by condensation 1h-benzo[d][1,2,3]triazol-1-yl)hydrazine with various aromatic aldehyde in ethanol in the presence of dimethyl formamid or acetic acid as catalyst by using MWI to yield the Schiff bases. These Schiff’s base on treatment with Maleic anhydride in dry conditions by using MWI to give 7-membered heterocyclic ring system (oxezapine) of (2-(1h)benzo[d][1,2,3]triazol-1-yl)-N-(2-(substituted penyl)-4, 7-dioxo-4,7-dihydro-1,3-oxazepin-3-(2h)-yl)acetamide. The purity of the compounds was confirmed by TLC. The final products were identified by their melting point, IR, 1hNMR, and UV-visible spectra.

关键词： hydrazone Microwave Oxezapine Benzotriazole hydrazine

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

Effect of Monovacancy Defects on Adsorbing of CO, CO2, NO and NO2on Carbon Nanotubes: First Principle Calculations

引用

Journal of Surface Engineered Materials and Advanced Technology 2013年第4期3卷 287-294页

作者： Ahlam A. EL-Barbary Gehan h. ismail Afaf M. Babeer Physics Department Ain Shams University Cairo Egypt Physics Department Faculty of Science Jazan University Jazan KSA.

We have applied density functional theory to investigate different types of carbon nanotubes (armchair (4,4)CNT and zig-zag (7,0)CNT) as sensors of some pollutant gas molecules, especially CO, CO2, NO and NO2. We show, for the first time, that the adsorption of pollutant gas molecules on carbon nanotubes are improved by introducing the monovacancy defects on the surfaces of (7,0)CNT. The adsorption energies, the optimal adsorption positions and the orientation of these gas molecules on the surfaces of carbon nanotubes are studied. It is found that the most adsorbed pollutant gas is NO molecule on (7,0)CNT.

关键词： Carbon Nanotubes DFT Sensor Monovacancy Defects

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

Ameliorating the re/dehydrogenation behaviour of Mgh2 by zinc titanate addition

引用

镁合金学报(英文) 2023年第6期11卷 2205-2215页

作者： N.A.Ali N.A.Sazelee M.F.Md Din M.M.Nasef A.A.Jalil haizen Liu M.ismail Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Electrical and Electronic Engineering Faculty of EngineeringNational Defence University of MalaysiaKem Sungai BesiKuala LumpurMalaysia Center of hydrogen Energy Institute of Future EnergyUniversiti Teknologi Malaysia81310 UTM Johor BahruJohorMalaysia Department of Chemical and Environmental Engineering Malaysia Japan International Institute of TechnologyUniversiti Teknologi MalaysiaJalan Sultan Yahya PetraKuala Lumpur 54100Malaysia Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia81310 UTM Johor BahruJohorMalaysia Guangxi Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Nanning 530004China

Magnesium hydride(Mgh_(2))is the most feasible and effective solid-state hydrogen storage material,which has excellent reversibility but initiates decomposing at high temperatures and has slow kinetics ***,zinc titanate(Zn_(2)TiO_(4))synthesised by the solid-state method was used as an additive to lower the initial temperature for dehydrogenation and enhance the re/dehydrogenation behaviour of Mgh_(2).With the presence of Zn_(2)TiO_(4),the starting temperature for the dehydrogenation of Mgh_(2)was remarkably lowered to around 290℃–305℃.In addition,within 300 s,the Mgh_(2)–Zn_(2)TiO_(4)sample absorbed 5.0 wt.%of h_(2)and 2.2–3.6 wt.%h_(2)was liberated from the composite sample in 30 min,which is faster by 22–36 times than as-milled Mgh_(2).The activation energy of the Mgh_(2)for the dehydrogenation process was also downshifted to 105.5 k J/mol with the addition of Zn_(2)TiO_(4)indicating a decrease of 22%than as-milled Mgh_(2).The superior behaviour of Mgh_(2)was due to the formation of Mg Zn_(2),MgO and MgTiO_(3),which are responsible for ameliorating the re/dehydrogenation behaviour of Mgh_(2).These findings provide a new understanding of the hydrogen storage behaviour of the catalysed-Mgh_(2)system.

关键词： hydrogen storage Solid-state storage Mgh_(2) Additive Zn_(2)TiO_(4)

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

A fast-response,mitochondria-targeted,red-emitting probe for imaging of hydrogen sulfide in biological samples

A fast-response,mitochondria-targeted,red-emitting probe for...

引用

第十一届全国化学生物学学术会议

作者： ismail ismail Xi Zhen State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical BiologyNational Pesticide Engineering Research CenterCollege of ChemistryNankai University

hydrogen sulfide(hS) is an important critical gaseous endogenous signaling molecule with emerging at the center of a rich field of chemical and biological research. hS could be enzymatically produced in vivo. The biological concentration of hS in the central nervous system and blood plasma are in the range of 50-160 μM and 10-100 μM, respectively. Studies have revealed that the hS level in vivo is correlated with numerous diseases, including the symptoms of Alzheimer’s disease, down syndrome, diabetes and liver cirrhosis.[1] Numerous physiological and pathological processes have been recognized to be linked to hS, many of its underlying molecular events in vivo remain largely unknown and needs to be explored.[2] A major challenge for hS detection in biological systems is to develop a highly selective and sensitive probe that exhibits distinctive response to micromolar hS over other cellular molecules, especially for millimolar biothiols. To address this challenge, hS-triggered chemical reactions, including nucleophilic addition, reduction of azide or nitro to amine, copper precipitation, thiolysis of dinitrophenyl ether, and thiolysis of NBD dyes, have been successfully employed to develop fluorescent probes for detection of biological hS.[3-5] A new NBD-based fluorescent turn-on probe was developed for hS detection in aqueous buffer and in living cells. The probes are based on the fast and selective thiolyling of the NBD amine. The probe 1 showed 19-fold red fluorescent turn-on upon hS activation. The probe could react rapidly with hS(k2= 27.8 M-1 s-1) to give 19-fold turn-on red-emitting fluorescence with excellent selectivity of 10 μM concentration. The probe is highly sensitive and selective toward hS over other biologically relevant species. This work further highlights that thiolysis of the NBD amine is a useful reaction for development of fluorescent hS probes.

关键词： fast-response mitochondrial-detection h2S living cells Zebrafish

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Radiation Exposure of Leukemia Blood Samples and Its Impacts on the Density of RBC, WBC, and PLT: In Vitro

引用

Open Journal of Biophysics 2012年第4期2卷 130-136页

作者： Asaad h. ismail Muhamad A. hamad Edrees M. T. harki Research Group of Medical Physic Physics Department Salahaddin University Erbil Iraq Education College/Scientific Department Salahaddin University Erbil Iraq

Complete blood counts were analyzed for 12 samples (six male & six female: Ages 15-40 years) of leukemia blood Samples for different dose rate and time of exposure using a Radium-226 source. Thus, an optimum time of exposure and exposure dose rate has improved for leukemia blood samples. Blood samples fractionated and placed in plastic wills, and melodic Coulter used to analysis exposed leukemia blood samples before and after exposure. Exposure technique involving CR-39 nuclear track detector and radiation survey dosimeter were used to estimate the alpha particle density incident on the blood samples and the exposed dose rate, respectively. In the first part, density of the accumulation of alpha particle on the surface of leukemia blood samples, and on the surface of CR-39NTDs varies exponentially with the exposed dose rate. This depends on the restricted energy loss of the incident alpha particles and target density. Assess an optimum time of exposure dose rate (1100 μSv/h) was the second objective. This depended on the changes in the blood components (PLT, WBC, and RBC) due to irradiation occurred for different durations of irradia-tion, and the duration of irradiation that influenced the leukemia blood samples (1Male;16 year and one Female 17 years) in this research was five minutes. Changes in the density of PLT, WBC, and RBC for leukemia blood samples and for different male (five male) and females (five female) was the third part of this research. It was found that the changes were variables due to the exposed dose rate. Optimum exposed dose rate to make more effects on the cancer cells for the leukemia blood samples began at the radiation dose rate of 43.25 1.206 μSv/h for both;male and female relatively, and this due to chromosomal aberration of the exposed cells. Finally, comparison study with the healthy blood samples has been investigated. More details are listed and clarified in the tables and figures of this paper.

关键词： Radiation Dose Alpha Particle RBC WBC PLT Leukemia CR-39NTDs

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

Protective effects of intravenous anesthetics on kidney tissue in obstructive jaundice

引用

World Journal of Gastroenterology 2014年第12期20卷 3320-3326页

作者： Sinan hatipoglu huseyin Yildiz Ertan Bulbuloglu ismail Coskuner Ergul Belge Kurutas Filiz hatipoglu harun Ciralik Mehmet Sait Berhuni Department of General Surgery Unit School of MedicineAdiyaman University Department of Anesthesiology and Reanimation Unit School of MedicineKahramanmaras Sutcuimam University Department of General Surgery Unit School of MedicineKahramanmaras Sutcuimam University Department of Biochemistry Unit School of Medicine Kahramanmaras Sutcuimam University Department of Obstetrics and Gynecology Unit School of MedicineAdiyaman University Department of Pathology Unit School of MedicineKahramanmaras Sutcuimam University

AIM: To evaluate the protective effects on kidney tissue of frequently used intravenous anesthetics (ketamine, propofol, thiopental, and fentanyl) in rats with obstructive jaundice.

关键词： Obstructive jaundice Postoperative acute renal failure Oxidative stress Intravenous anesthetics Renal tissue damage

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

Investigation of ellipticity and pump power in a passively mode-locked fiber laser using the nonlinear polarization rotation technique

引用

Chinese Optics Letters 2017年第5期15卷 45-49页

作者： h. Ahmad S. I. Ooi M. Z. A. Razak S. R. Azzuhri A. A. Jasim K. Thambiratnam M. F. ismail M. A. ismail photonics Research Centre University of Malaya Kuala Lumpur Malaysia Institute of Microengineering and Nanoelectronics Research Complex University Kebangsaan Malaysia 43600 Bangi Selangor Malaysia

An elliptical initial polarization state is essential for generating mode-locked pulses using the nonlinear polarization rotation technique. In this work, the relationship between the ellipticity ranges capable of maintaining mode-locked operation against different pump power levels is investigated. An increasing pump power, in conjunction with minor adjustments to the polarization controller＇s quarter waveplate, results in a wider ellipticity range that can accommodate mode-locked operation. Other parameters such as noise, pulsewidth, and average output power are also observed to vary as the ellipticity changes.

关键词： mode Investigation of ellipticity and pump power in a passively mode-locked fiber laser using the nonlinear polarization rotation tec

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

Corrosion behavior of Al/Mg/Al multilayered composite elaborated by accumulative roll bonding

引用

Transactions of Nonferrous Metals Society of China 2022年

作者： ismail BENChERIFA Khadidja ABIB Abdel Yazid KhEREDDINE Baya ALILI Djamal BRADAI Center for Development of Advanced Technologies， CDTA， Cité du 20 aoét 1956 Laboratory of Metallic and Semiconducting Materials (LMSM)， Department of Mechanical Engineering， University of Biskra Laboratory of Materials Physics， Faculty of Physics， University of Sciences and Technology-houari Boumediene (U.S.T.h.B.)， P.O.Box 32， El-Alia

The corrosion behavior of an Al1050/AZ31/Al1050 multilayered hybrid composite fabricated by the accumulated roll bonding (ARB) technique up to six cycles in a 3.5% NaCl (wt.%) solution has been studied through potentiodynamic polarization tests (PDP)， electrochemical impedance spectroscopy (EIS)， scanning electron microscopy (SEM-EDS)， Raman spectroscopy and X-ray diffraction (XRD). In order to deeply apprehend the corrosion resistance and corrosion products of the Al1050/AZ31/Al1050 multilayered hybrid composite， almost similar investigation were performed on the Al1050/Al1050/Al1050 multilayered sample elaborated by ARB up to one cycle. Potentiodynamic polarization plots and electrochemical impedance spectroscopy showed that the corrosion rate was strongly affected by the ARB strain level. A higher corrosion rate and reduced polarization resistance were evidenced compared to the Al1050/Al1050/Al1050 multilayered sample. The AZ31 layers seemed to dominate the corrosion process. Raman and XRD analysis did confirm the presence of the main corrosion product that was Mg(Oh)and the absence of any chloride such as (Mg(Oh))·MgCl

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Novel fibrin-fibronectin matrix accelerates mice skin wound healing

引用

Bioactive Materials 2020年第4期5卷 949-962页

作者： Carlos Poblete Jara Ou Wang Thais Paulino do Prado Ayman ismail Frank Marco Fabian han Li Licio A.Velloso Mark A.Carlson William Burgess Yuguo Lei William h.Velander Eliana P.Araújo Nursing School University of CampinasCampinasSPBrazil Laboratory of Cell Signaling University of CampinasCampinasSPBrazil Department of Chemical and Biomolecular Engineering University of NebraskaLincolnNEUSA Biomedical Engineering Program University of NebraskaLincolnNEUSA School of Biological Science University of NebraskaLincolnNEUSA Department of Surgery University of Nebraska Medical Center and the VA Nebraska-Western Iowa Health Care SystemUSA Mary and Dick holland Regenerative Medicine Program University of Nebraska Medical CenterOmahaNEUSA Fred&Pamela Buffett Cancer Center University of Nebraska Medical CenterOmahaNEUSA

Plasma fibrinogen(F1)and fibronectin(pFN)polymerize to form a fibrin clot that is both a hemostatic and provisional matrix for wound *** 90%of plasma F1 has a homodimeric pair ofγchains(γγF1),and 10%has a heterodimeric pair ofγand more acidicγ′chains(γγ′F1).We have synthesized a novel fibrin matrix exclusively from a 1:1(molar ratio)complex ofγγ′F1 and pFN in the presence of highly active thrombin and recombinant Factor XIII(rFXIIIa).In this matrix,the fibrin nanofibers were decorated with pFN nanoclusters(termedγγ′F1:pFN fibrin).In contrast,fibrin made from 1:1 mixture ofγγF1 and pFN formed a sporadic distribution of“pFN droplets”(termedγγF1+pFN fibrin).Theγγ′F1:pFN fibrin enhanced the adhesion of primary human umbilical vein endothelium cells(hUVECs)relative to theγγF1+FN *** dimensional(3D)culturing showed that theγγ′F1:pFN complex fibrin matrix enhanced the proliferation of both hUVECs and primary human *** in the 3Dγγ′F1:pFN fibrin exhibited a starkly enhanced vascular morphogenesis while an apoptotic growth profile was observed in theγγF1+pFN *** toγγF1+pFN fibrin,mouse dermal wounds that were sealed byγγ′F1:pFN fibrin exhibited accelerated and enhanced *** study suggests that a 3D pFN presentation on a fibrin matrix promotes wound healing.

关键词： Fibrin Fibronectin Nanoclusters Wound healing

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：