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| 1 | One-to-many optical information encryption transmission method based on temporal ghost imaging and code division multiple access显示文摘A method is presented for one-to-many information encryption transmission by using temporal ghost imaging and code division multiple access.In the encryption transmission process,code division multiple access technologies combine multiple information sources,and the chip sequence corresponding to each set of information is used as the first key.The transmission end loads the transmission information onto a series of temporal random patterns of temporal ghost imaging and transmits it to the receivers.A series of temporal random patterns is the second key.During the decryption,each receiver can get the same encrypted information and use the second key to obtain the transmitted information.Finally,each receiver uses the unique chip sequence to get corresponding information.This encryption transmission method realizes one-to-many information encryption transmission at the same time over the same channel.Double encryption ensures the security of information.Simulation and experiment results verify the effectiveness and security of the method.The method has strong antinoise ability and can effectively resist various attack modes.At the same time,this method solves the problem that the use of code division multiple access enlarges the signal bandwidth,and ensures that no cross talk occurs between various sources of information. | YI KANG LEIHONG ZHANG HUALONG YE MANTONG ZHAO SAIMA KANWAL CHUNYAN BAI DAWEI ZHANG | 2019 | Photonics Research2019，7，12： | 4 |
| 2 | Polarization-independent highly efficient generation of Airy optical beams with dielectric metasurfaces显示文摘Airy optical beams have emerged to hold enormous theoretical and experimental research interest due to their outstanding characteristics.Conventional approaches suffer from bulky and costly systems,as well as poor phase discretization.The newly developed metasurface-based Airy beam generators have constraints of polarization dependence or limited generation efficiency.Here,we experimentally demonstrate a polarization-independent silicon dielectric metasurface for generation of high-efficiency Airy optical beams.In our implementation,rather than synchronous manipulation of the amplitude and phase by plasmonic or Huygens’metasurfaces,we employ and impose a 3/2 phase-only manipulation to the dielectric metasurface,consisting of an array of silicon nanopillars with an optimized transmission efficiency as high as 97%.The resultant Airy optical beams possess extraordinarily large deflection angles and relatively narrow beam widths.Our validated scheme will open up a fascinating doorway to broaden the application scenarios of Airy optical beams on ultracompact photonic platforms. | Binbin Yu Jing Wen Lei Chen Leihong Zhang Yulong Fan Bo Dai Saima Kanwal Dangyuan Lei Dawei Zhang | 2020 | Photonics Research2020，8，7： | 2 |
| 3 | Convolutional Neural Network-Based Classificationof Multiple Retinal Diseases Using Fundus Images显示文摘Use of deep learning algorithms for the investigation and analysis of medical images has emerged as a powerful technique.The increase in retinal dis-eases is alarming as it may lead to permanent blindness if left untreated.Automa-tion of the diagnosis process of retinal diseases not only assists ophthalmologists in correct decision-making but saves time also.Several researchers have worked on automated retinal disease classification but restricted either to hand-crafted fea-ture selection or binary classification.This paper presents a deep learning-based approach for the automated classification of multiple retinal diseases using fundus images.For this research,the data has been collected and combined from three distinct sources.The images are preprocessed for enhancing the details.Six layers of the convolutional neural network(CNN)are used for the automated feature extraction and classification of 20 retinal diseases.It is observed that the results are reliant on the number of classes.For binary classification(healthy vs.unhealthy),up to 100%accuracy has been achieved.When 16 classes are used(treating stages of a disease as a single class),93.3%accuracy,92%sensitivity and 93%specificity have been obtained respectively.For 20 classes(treating stages of the disease as separate classes),the accuracy,sensitivity and specificity have dropped to 92.4%,92%and 92%respectively. | Aqsa Aslam Saima Farhan Momina Abdul Khaliq Fatima Anjum Ayesha Afzaal Faria Kanwal | 2023 | Intelligent Automation & Soft Computing2023，，6： | 0 |
| 4 | Overexpression of GATA binding protein 4 and myocyte enhancer factor 2C induces differentiation of mesenchymal stem cells into cardiac-like cells显示文摘BACKGROUND Heart diseases are the primary cause of death all over the world.Following myocardial infarction,billions of cells die,resulting in a huge loss of cardiac function.Stem cell-based therapies have appeared as a new area to support heart regeneration.The transcription factors GATA binding protein 4(GATA-4)and myocyte enhancer factor 2C(MEF2C)are considered prominent factors in the development of the cardiovascular system.AIM To explore the potential of GATA-4 and MEF2C for the cardiac differentiation of human umbilical cord mesenchymal stem cells(hUC-MSCs).METHODS hUC-MSCs were characterized morphologically and immunologically by the presence of specific markers of MSCs via immunocytochemistry and flow cytometry,and by their potential to differentiate into osteocytes and adipocytes.hUC-MSCs were transfected with GATA-4,MEF2C,and their combination to direct the differentiation.Cardiac differentiation was confirmed by semiquant itative real-time polymerase chain reaction and immunocytochemistry.RESULTS hUC-MSCs expressed specific cell surface markers CD105,CD90,CD44,and vimentin but lack the expression of CD45.The transcription factors GATA-4 and MEF2C,and their combination induced differentiation in hUC-MSCs with significant expression of cardiac genes i.e.,GATA-4,MEF2C,NK2 homeobox 5(NKX2.5),MHC,and connexin-43,and cardiac proteins GATA-4,NKX2.5,cardiac troponin T,and connexin-43.CONCLUSION Transfection with GATA-4,MEF2C,and their combination effectively induces cardiac differentiation in hUC-MSCs.These genetically modified MSCs could be a promising treatment option for heart diseases in the future. | Syeda Saima Razzaq Irfan Khan Nadia Naeem Asmat Salim Sumreen Begum Kanwal Haneef | 2022 | World Journal of Stem Cells2022，14，9： | 0 |
| 5 | Helicobacter pylori outer membrane protein Q genotypes and their susceptibility to antiadhesive phytotherapeutic agents显示文摘OBJECTIVE: Helicobacter pylori is a Gram-negative organism. Its outer membrane protein Q(Hop Q) mediates host-pathogen interactions; Hop Q genotypes 1 and 2 are found associating with gastroduodenal pathologies. The authors measured the anti-adhesion effects of the extracts of Abelmoschus esculentus, Zingiber officinale, Trachyspermum ammi, Glycyrrhiza glabra, Curcuma longa and Capsicum annum against Hop Q genotypes and H. pylori cytotoxin-associated gene A(Cag A).METHODS: DNA was extracted by polymerase chain reaction of the Hop Q genotypes(i.e., type 1, type 2 and Cag A) from 115 H. pylori strains. The effect of the extracts from selected dietary ingredients was determined using a gastric adenocarcinoma cell line and a quantitative DNA fragmentation assay. The anti-adhesive effect of these extracts on H. pylori was tested using an anti-adhesion analysis.RESULTS: C. annum, C. longa and A. esculentus showed prominent anti-adhesion effects with resultant values of 17.3% ± 2.9%, 14.6% ± 3.7%, 13.8% ± 3.6%, respectively, against Hop Q type 1 and 13.1% ± 1.7%, 12.1% ± 2%, 11.1% ± 1.6%, respectively, against Hop Q type 2. C. longa(93%), C. annum(89%) and A. esculentus(75%) had better anti-adhesive activity against H. pylori with Hop Q type 1 compared to Hop Q type 2 with respective values of 70%, 64% and 51%. Extracts of C. annum(14.7% ± 4.1%), A. esculentus(12.3% ± 4.1%) and Z. officinale(8.4% ± 2.8%) had an anti-adhesion effect against Cag A-positive H. pylori strains compared to Cag A-negative strains. | Javed Yakoob Zaigham Abbas Malik Hassan Mehmood Kanwal Tariq Saima Azhar Saleem Safia Awan Abdul Malik Saeed Hamid Rustam Khan Wasim Jafri | 2017 | Journal of Integrative Medicine2017，15，5： | 0 |
| 6 | Reversible Watermarking Method with Low Distortion for the Secure Transmission of Medical Images显示文摘In telemedicine,the realization of reversible watermarking through information security is an emerging research field.However,adding watermarks hinders the distribution of pixels in the cover image because it creates distortions(which lead to an increase in the detection probability).In this article,we introduce a reversible watermarking method that can transmit medical images with minimal distortion and high security.The proposed method selects two adjacent gray pixels whose least significant bit(LSB)is different from the relevant message bit and then calculates the distortion degree.We use the LSB pairing method to embed the secret matrix of patient record into the cover image and exchange pixel values.Experimental results show that the designed method is robust to different attacks and has a high PSNR(peak signal-to-noise ratio)value.The MRI image quality and imperceptibility are verified by embedding a secret matrix of up to 262,688 bits to achieve an average PSNR of 51.657 dB.In addition,the proposed algorithm is tested against the latest technology on standard images,and it is found that the average PSNR of our proposed reversible watermarking technology is higher(i.e.,51.71 dB).Numerical results show that the algorithm can be extended to normal images and medical images. | Rizwan Taj Feng Tao Shahzada Khurram Ateeq Ur Rehman Syed Kamran Haider Akber Abid Gardezi Saima Kanwal | 2022 | Computer Modeling in Engineering & Sciences2022，，3： | 0 |
| 7 | A Robust Data Hiding Reversible Technique for Improving the Security in e-Health Care System显示文摘The authenticity and integrity of healthcare is the primary objective.Numerous reversible watermarking schemes have been developed to improve the primary objective but increasing the quantity of embedding data leads to covering image distortion and visual quality resulting in data security detection.A trade-off between robustness,imperceptibility,and embedded capacity is difficult to achieve with current algorithms due to limitations in their ability.Keeping this purpose insight,an improved reversibility watermarking methodology is proposed to maximize data embedding capacity and imperceptibility while maintaining data security as a primary concern.A key is generated by a random path with minimum bit flipping is selected in the 4 × 4 block to gain access to the data embedding patterns.The random path's complex structure ensures data security.Data of various sizes(8 KB,16 KB,32 KB)are used to analyze image imperceptibility and evaluate quality factors.The proposed reversible watermarking methodology performance is tested under standard structures PSNR,SSIM,and MSE.The results revealed that the MRI watermarked images are imperceptible,like the cover image when LSB is 3 bits plane.Our proposed reversible watermarking methodology outperforms other related techniques in terms of average PSNR(49.29).Experiment results show that the suggested reversible watermarking method improves data embedding capacity and imperceptibility compared to existing state-of-the-art approaches. | Saima Kanwal Feng Tao Ahmad Almogren Ateeq Ur Rehman Rizwan Taj Ayman Radwan | 2023 | Computer Modeling in Engineering & Sciences2023，，1： | 0 |
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