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An Efficient Image Cipher Based on 2D Scrambled Image and Random Numbers

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Journal of Cyber Security 2022年第3期4卷 169-183页

作者： asghar ali Sammia Ansar Ashwag Albakri Nadeem Iqbal shahid Yousaf Department of Mathematics Mirpur University of Science and TechnologyMirpur10250Pakistan Department of Computer Science Jazan UniversityJazan45142Saudi Arabia Department of Computer Science&IT The University of LahoreLahore54000Pakistan

Security of images plays an import role in communication in current era due to the popularity and high usage ofmultimedia content in the *** security is described as applying an encryption algorithm over the given plaintext images to produce cipher images that can be transmitted safely over the open channel,the *** problem which plagues these image ciphers is that they are too much time consuming,and that do not meet the dictates of the present *** this paper,we aim to provide an efficient image *** previous studies employed many constructs like Langton’s Ant,15 puzzle game and Castle in the 2D scrambled image based image ciphers,which had grave implications related to the high execution time of the *** current study directly made use of the 2D scrambled image to realize the ***,no compromise has been made over the security of the proposed image *** numbers have been generated by triggering the Intertwining Logistic Chaotic *** cipher has been subjected to many important validation metrics like key space,information entropy,correlation coefficient,crop attack and lastly time complexity to demonstrate its immunity to the various attacks,and its realworld *** this paper,our proposed image cipher exhibits an encryption speed of 0.1797 s,which is far better than many of the existing encryption ciphers.

关键词： Encryption cipher random numbers image processing secret key chaotic map

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超级电容器用生物质基多孔炭的研究进展

新型炭材料 2021年第3期36卷 546-572页

作者： Majid Shaker ali asghar Sadeghi Ghazvini 曹蔚琦 Reza Riahifar 葛奇重庆诺奖二维材料研究院有限公司重庆400714中国 Department of Materials Science and Engineering Tarbiat Modares UniversityTehran ***Iran 重庆大学光电技术与系统教育部重点实验室重庆400044中国 Department of Nanotechnology and Advanced Materials Materials and Energy Research Center of IranTehran 14115-111 Iran

在最近的几十年中,超级电容器(SC)已在电化学能量存储设备中获得了更为重要的地位。SC为使用寿命长的能量存储设备提供了可观的功率密度和令人满意的能量密度,适用于多种应用。因此,这些装置的进一步发展依赖于提供合适,低成本,环境友... 详细信息

在最近的几十年中,超级电容器(SC)已在电化学能量存储设备中获得了更为重要的地位。SC为使用寿命长的能量存储设备提供了可观的功率密度和令人满意的能量密度,适用于多种应用。因此,这些装置的进一步发展依赖于提供合适,低成本,环境友好和丰富的材料作为SC的电极活性材料。在用于SC的电极材料中,活性炭表现出优异的性能。它们具有优异的电化学效率,高比表面积,高吸附性,可调节的表面化学性质,快速的离子/电子传输,低成本和丰富的特性,使其成为SC电极的最佳材料。如果从生物质前驱体制备活性炭,则可以协同增强这些优势。由于生物质为可再生来源,低成本,便捷的加工过程以及对环境的友好性,研究者们将注意力集中在生物质上。在本文中,试图全面了解作为电化学储能装置的SC的基本原理。然后,对各种来源的生物质进行分类和分析。最后,讨论了这些生物质前驱体作为SCs电极材料的应用和活化技术。

关键词：超级电容器电极多孔炭生物质活化

Forkhead box P3 and indoleamine 2,3-dioxygenase co-expression in Pakistani triple negative breast cancer patients

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World Journal of Clinical Oncology 2020年第12期11卷 1018-1028页

作者： Kashif asghar Asif Loya Iftikhar ali Rana muhammad Abu Bakar Asim Farooq muhammad Tahseen muhammad Ishaq Iqra Masood muhammad Usman Rashid Department of Basic Science Research Shaukat Khanum Memorial Cancer Hospital and Research CentreLahorePunjab 54000Pakistan Department of Pathology Shaukat Khanum Memorial Cancer Hospital and Research CentreLahorePunjab 54000Pakistan Department of Cancer Registry and Clinical Data Management Shaukat Khanum Memorial Cancer Hospital and Research CentreLahorePunjab 54000Pakistan Department of Clinical Research Shaukat Khanum Memorial Cancer Hospital and Research CentreLahorePunjab 54000Pakistan

BACKGROUND Forkhead box P3(FOXP3)is a specific marker for immunosuppressive regulatory T(T-reg)cells.T-regs and an immunosuppressive enzyme,indoleamine 2,3-dioxygenase(IDO),are associated with advanced disease in *** To evaluate the co-expression of FOXP3 and IDO in triple negative breast cancer(TNBC)with respect to hormone-positive breast cancer patients from *** Immunohistochemistry was performed to analyze the expression of FOXP3,IDO,estrogen receptor,progesterone receptor,and human epidermal growth factor receptor on tissues of breast cancer patients(n=100):Hormone-positive breast cancer(n=51)and TNBC(n=49).A total of 100 patients were characterized as FOXP3 negative vs positive and further categorized based on low,medium,and high IDO expression *** and multivariate logistic regression models were *** Out of 100 breast tumors,25%expressed FOXP3 positive T-regs.A significant coexpression of FOXP3 and IDO was observed among patients with TNBC(P=0.01)compared to those with hormone-positive breast *** variables were identified as significant independent risk factors for FOXP3 positive:IDO expression high(adjusted odds ratio(AOR)5.90;95%confidence interval(CI):1.22-28.64;P=0.03)and TNBC(AOR 2.80;95%CI:0.96-7.95;P=0.05).CONCLUSION Our data showed that FOXP3 positive cells might be associated with high expression of IDO in TNBC ***3 and IDO co-expression may also suggest its involvement in disease,and evaluation of FOXP3 and IDO expression in TNBC patients may offer a new therapeutic option.

关键词： Forkhead box P3 Indoleamine 2,3-dioxygenase Triple negative breast cancer T-regs Immunotherapy Cancer

Applied Techniques in Tracking Moving Targets in Marine Using Image Processing

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Open Journal of Marine Science 2016年第4期6卷 524-537页

作者： Hossein Kardan Moghaddam ali asghar Yarifard Birjand University of Technology Birjand Iran University of Bojnord Bojnord Iran

Moving objects tracking is one of the most used categories in the realm of machine vision that has attracted attention of so many researchers in recent decades. Video tracking has various applications in military industries, protective systems and machine vision. Target tracking algorithms vary according to their usages. In this paper, it has been attempted to discuss and analyze mobile target tracking techniques and algorithms in Marine.

关键词： Moving Objects Tracking Good Features for Track Contour

Experimentation on Optimal Configuration and Size of Thin Cylinders in Natural Convection

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Semiconductor Science and Information Devices 2022年第2期4卷 17-28页

作者： ali Riaz Adnan Ibrahim muhammad Sohail Bashir Masroor asghar muhammad Abdullah Ajmal Shah Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefei230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China Department of Information Technology University of Southern QueenslandToowoomba4350QueenslandAustralia

In this paper,an experimental study of laminar,steady state natural convection heat transfer from heated thin cylinders in an infinite air medium has been *** electrically heated cylinders having the same slenderness ratio(L/D)i.e.6.1 but different diameters i.e.3.8 cm and 5.08 cm were used.105 experiments were carried out to study the effect of diameter and inclination angle of thin cylinder on natural convection heat *** mandatory corrections of radiation and endcap heat losses,convective heat transfer results were presented in the form of local and average dimensionless *** vertical configuration of thin cylinder,Nusselt number was varied from 52.99 to 95.10 corresponding to 1.28×10^(8)≤Ra*L≤1.08×10^(10).While for horizontal configuration,Nusselt number was varied from 10.74 to 17.78 corresponding to 9.42×10^(4)≤Ra*D≤8.17×10^(6).Results were compared with the published data and found satisfactory as the maximum percentage difference was only 3.09%.The essence of research is that the heat transfer coefficient increases with decrease in diameter and increase in inclination *** flow visualization was done to capture patterns of fluid ***,comparison was made to quantify increase in Nusselt number from slender cylinder as compared to the flat plate.

关键词： Natural convection Thin cylinders Flat plate Nusselt number

还原氧化石墨烯-硒化银纳米复合材料的水热合成与表征及其活性氧物种产生(英文)

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催化学报 2015年第4期36卷 603-611页

作者： Lei Zhu Shu Ye asghar ali Kefayat Ulla Kwang Youn Cho Won-Chun Oh Department of Advanced Materials Science & Engineering Hanseo University Korea Institute of Ceramic Engineering and Technology

A visible-light photocatalyst containing Ag2Se and reduced graphene oxide(RGO) was synthesized by a facile sonochemical-assisted hydrothermal method. X-ray diffraction, scanning electron mi-croscopy with energy-dispersive X-ray analysis, and ultraviolet-visible diffuse reflectance spectros-copy results indicated that the RGO-Ag2Se nanocomposite contained small crystalline Ag2Se nano-particles dispersed over graphene nanosheets and absorbed visible light. The high crystallinity of the nanoparticles increased photocatalytic activity by facilitating charge transport. N2 adsorp-tion-desorption measurements revealed that the RGO-Ag2Se nanocomposite contained numerous pores with an average diameter of 9 nm, which should allow reactant molecules to readily access the Ag2Se nanoparticles. The RGO-Ag2Se nanocomposite exhibited higher photocatalytic activity than bulk Ag2Se nanoparticles to degrade organic pollutant rhodamine B and industrial dye Texbrite BA-L under visible-light irradiation(λ > 420 nm). The generation of reactive oxygen spe-cies in RGO-Ag2Se was evaluated through its ability to oxidize 1,5-diphenylcarbazide to 1,5-diphenylcarbazone. The small size of the Ag2Se nanoparticles in RGO-Ag2Se was related to the use of ultrasonication during their formation, revealing that this approach is attractive to form po-rous RGO-Ag2Se materials with high photocatalytic activity under visible light.

关键词：纳米复合材料氧化石墨水热合成氧化物活性氧硒化银可见光照射光催化活性

Land Cover Classification and Forest Change Analysis, Using Satellite Imagery-A Case Study in Dehdez Area of Zagros Mountain in Iran

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Journal of Geographic Information System 2011年第1期3卷 1-11页

作者： ali asghar Torahi Suresh Chand Rai 不详

The importance of accurate and timely information describing the nature and extent of land resources and changes over time is increasing, especially in mountainous areas. We have developed a methodology to map and monitor land cover change using multitemporal Landsat Thematic Mapper (TM) and ASTER data in Zagros mountains of Iran for 1990, 1998, and ***-use/cover mapping is achieved through interpreta-tion of Landsat TM satellite images of 1990, 1998 and TERRA-ASTER image of 2006 using ENVI 4.3. Based on the Anderson land-use/cover classification system, the land-use and land-covers are classified as forest land, rangeland, water bodies, agricultural land and residential land. The unsupervised image classifi-cation method carried out prior to field visit, in order to determine strata for ground truth. Fieldwork carried out to collect data for training and validating land-use/cover interpretation from satellite image of 2006, and for qualitative description of the characteristics of each land-use/cover class. The land-use/cover maps of 1990, 1998 and 2006 were produced by using supervised image classification technique based on the Maxi-mum Likelihood Classifier (MLC) and 132 training samples. Error matrices as cross-tabulations of the mapped class vs. the reference class were used to assess classification accuracy. Overall accuracy, user’s and producer’s accuracies, and the Kappa statistic were then derived from the error matrices. A multi-date post-classification comparison change detection algorithm was used to determine changes in land cover in three intervals, 1990–1998, 1998–2006 and 1990–2006. To evaluate the change maps for the 1990 to 2006 interval, we randomly sampled the areas that classified as change and no-change and determined whether they were correctly classified. The maps showed that between 1990 and 2006 the amount of forest land de-creased from 67% to 38.5% of the total area, while rangelands, agriculture, settlement and surface water in-cre

关键词： Land Cover Classification Multitemporal Change Detection Landsat ASTER

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光伏太阳能电池用硅纳米线的合成

光伏太阳能电池用硅纳米线的合成

作者： ali asghar 东南大学

学位级别：硕士

利用与CMOS工艺和太阳能电池生产工艺相兼容的低温制造方制备有序硅纳米线阵列是未来电子器件制造技术的发展方向之一,并有助于降低光伏器件制造成本。这一需求产生的背景是基于CMOS工艺的传统电子器件已难以突破摩尔定律趋势减缓的物... 详细信息

利用与CMOS工艺和太阳能电池生产工艺相兼容的低温制造方制备有序硅纳米线阵列是未来电子器件制造技术的发展方向之一,并有助于降低光伏器件制造成本。这一需求产生的背景是基于CMOS工艺的传统电子器件已难以突破摩尔定律趋势减缓的物理障碍,并且人们对于降低太阳能电池生产成本这一需求也日益增长。本文提出了一种分数因子生长研究,比较了在150 ℃-400 ℃的温度范围内的铝催化硅纳米线生长情况。使用铝作为催化剂,在400 ℃的温度下,制备得到了在硅衬底和晶面上密集生长的硅纳米线。通过分析比较实验结果,并对单根硅纳米线进行SEM分析,发现这种纳米线有单晶和非晶两种特征。并且这种硅纳米线薄膜具有良好的光传输特性。在不同传输角情况下,300 nm-1400 nm波长范围内均有透射减弱现象。综上所述,我们从材料制备方面为基于硅纳米线的新型光电器件研制提供了新的研究思路,这种新的技术方法可满足ITRS和整个科学界对可持续摩尔定律趋势的电子产品的需求,以及满足消费者对廉价光伏产品日益增长的需求。

关键词：硅纳米线制造铝催化剂光传输传输角度

Psychological effects of infertility in clinical varicocele patients

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Health 2011年第8期3卷 504-506页

作者： ali asghar Ketabchi Mahsa Ketabchi 不详

Objective. The general objective of this study was to analyze the perception and attitude of Clinical varicocele patients treated for infertility at the Shafa Hospital of Kerman, Iran. Method. This is a case control study of 62 infertile patients with Clinical varicocele, they invited to participate to a survey by demographic and Hamilton Depression Rating Scale (HDRS) questionnaires prior to the surgical procedure and compared the results with a control group (50 age matched healthy men), from April 2009 to May 2010 at the Shafa Hospital of Kerman, Iran. Results. In the study group 45% of patients (28/62) said that they used to isolate themselves from the public. 32 % (n = 20) patients have doubt about the results of operation, % 20 (n = 12) believed operation will cause erectile dysfunction;16 % (n = 10) declared that their infertility problem is mainly due to their wife infertility not themselves;17.7 % (n = 11) of them divorced (regarding to infertility). Hamilton Depression Rating Scale were respectively (28.8 +/– 6.5) and (15.6 +/–1 7) in the study and control groups (p = 0.001). Conclusions. Clinical varicocele patients have a very negative perception about their condition specially whose primary infertility and in comparing to general population have more depression grades. So, it is strongly recommended that for improve their psychological status by detailing their problem and changing negative perception and attitude to encourage them to follow and continue treatment options.

关键词： Clinical Varicocele Infertility Attitude