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Secure Transmission of Compressed Medical Image Sequences on Communication Networks Using Motion Vector Watermarking

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Computers, Materials & Continua 2024年第3期78卷 3283-3301页

作者： Rafi Ullah mohd Hilmi bin Hasan Sultan Daud Khan Mussadiq abdul Rahim Computer and Information Sciences Department Universiti Teknologi PETRONASBandar Seri Iskandar Perak32610Malaysia Department of Computer Science National University of TechnologyIslamabad46000Pakistan Interdisciplinary Research Center for Intelligent Secure Systems King Fahd University of Petroleum and MineralsDammam31261Saudi Arabia

Medical imaging plays a key role within modern hospital management systems for diagnostic *** methodologies are extensively employed to mitigate storage demands and enhance transmission speed,all while upholding image ***,an increasing number of hospitals are embracing cloud computing for patient data storage,necessitating meticulous scrutiny of server security and privacy ***,considering the widespread availability of multimedia tools,the preservation of digital data integrity surpasses the significance of compression *** response to this concern,we propose a secure storage and transmission solution for compressed medical image sequences,such as ultrasound images,utilizing a motion vector watermarking *** watermark is generated employing an error-correcting code known as Bose-Chaudhuri-Hocquenghem(BCH)and is subsequently embedded into the compressed sequence via block-based motion *** the process of watermark embedding,motion vectors are selected based on their magnitude and phase *** embedding watermarks,no specific spatial area,such as a region of interest(ROI),is used in the *** embedding of watermark bits is dependent on motion *** reversible watermarking allows the restoration of the original image sequences,we use the irreversible watermarking *** reason for this is that the use of reversible watermarks may impede the claims of ownership and legal *** restoration of original data or images may call into question ownership or other legal *** peak signal-to-noise ratio(PSNR)and structural similarity index(SSIM)serve as metrics for evaluating the watermarked image *** all images,the PSNR value exceeds 46 dB,and the SSIM value exceeds *** results substantiate the efficacy of the proposed technique in preserving data integrity.

关键词： Block matching algorithm(BMA) compression full-search algorithm motion vectors ultrasound image sequence watermarking

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Piper sarmentosum as an antioxidant on oxidative stress in human umbilical vein endothelial cells induced by hydrogen peroxide

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第5期11卷 357-365页

作者： abdul Hamid HAFIZAH Zakaria ZAITON Amom ZULKHAIRI Adenan mohd ILHAM Megat mohd Nordin NOR ANITA abdullah Mahdy ZALEHA Department of Physiology Universiti Kebangsaan Malaysia Medical CentreJalan Raja Muda Aziz50300 Kuala LumpurMalaysia Department of Human Anatomy Division of PhysiologyFaculty of Medicine and Health SciencesUniversiti Putra Malaysia Forest Research Institute of Malaysia Department of Obstetrics and Gynecology Universiti Kebangsaan Malaysia Medical Centre

Endothelial cell death due to increased reactive oxygen species(ROS) may contribute to the initial endothelial injury,which promotes atherosclerotic lesion *** sarmentosum(PS),a natural product,has been shown to have an antioxidant property,which is hypothesized to inhibit production of ROS and prevent cell ***,the present study was designed to determine the effects of PS on the hydrogen peroxide(H2O2)-induced oxidative cell damage in cultured human umbilical vein endothelial cells(HUVECs).In this experiment,HUVECs were obtained by collagenase perfusion of the large vein in the umbilical cord and cultured in medium M200 supplemented with low serum growth supplementation(LSGS).HUVECs were treated with various concentrations of H2O2(0-1000 μmol/L) and it was observed that 180 μmol/L H2O2 reduced cell viability by 50% as denoted by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) *** the above concentration as the positive control,the H2O2-induced HUVECs were concomitantly treated with various concentrations(100,150,250 and 300 μg/ml) of three different extracts(aqueous,methanol and hexane) of ***(MDA),superoxide dismutase(SOD),catalase(CAT) and glutathione peroxidase(GPX) levels showed a significant increase(P<0.05) in HUVECs compared to the negative ***,PS extracts showed a protective effect on HUVECs from H2O2-induced cell apoptosis with a significant reduction in MDA,SOD,CAT and GPX levels(P<0.05).Furthermore,PS had exhibited ferric reducing antioxidant power with its high phenolic ***,it was concluded that PS plays a beneficial role in reducing oxidative stress in H2O2-induced HUVECs.

关键词： Piper sarmentosum Human umbilical vein endothelial cells(HUVECs) Malondialdehyde Oxidative stress Antioxidant enzymes

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Adaptable and Dynamic Access Control Decision-Enforcement Approach Based on Multilayer Hybrid Deep Learning Techniques in BYOD Environment

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Computers, Materials & Continua 2024年第9期80卷 4663-4686页

作者： Aljuaid Turkea Ayedh M Ainuddin Wahid abdul Wahab mohd Yamani Idna Idris Faculty of Computer Science and Information Technology Universiti MalayaKuala Lumpur50603Malaysia Faculty of Computer Science and Information Technology Shaqra UniversityShaqra11961Saudi Arabia Center for Mobile Cloud Computing Faculty of Computer Science and Information TechnologyUniversiti MalayaKuala Lumpur50603Malaysia

Organizations are adopting the Bring Your Own Device(BYOD)concept to enhance productivity and reduce ***,this trend introduces security challenges,such as unauthorized *** access control systems,such as Attribute-Based Access Control(ABAC)and Role-Based Access Control(RBAC),are limited in their ability to enforce access decisions due to the variability and dynamism of attributes related to users and *** paper proposes a method for enforcing access decisions that is adaptable and dynamic,based on multilayer hybrid deep learning techniques,particularly the Tabular Deep Neural Network Tabular DNN *** technique transforms all input attributes in an access request into a binary classification(allow or deny)using multiple layers,ensuring accurate and efficient access *** proposed solution was evaluated using the Kaggle Amazon access control policy dataset and demonstrated its effectiveness by achieving a 94%accuracy ***,the proposed solution enhances the implementation of access decisions based on a variety of resource and user attributes while ensuring privacy through indirect communication with the Policy Administration Point(PAP).This solution significantly improves the flexibility of access control systems,making themmore dynamic and adaptable to the evolving needs ofmodern ***,it offers a scalable approach to manage the complexities associated with the BYOD environment,providing a robust framework for secure and efficient access management.

关键词： BYOD security access control access control decision-enforcement deep learning neural network techniques TabularDNN multilayer dynamic adaptable flexibility bottlenecks performance policy conflict

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Development of a new connection for precast concrete walls subjected to cyclic loading

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Earthquake Engineering and Engineering Vibration 2017年第1期16卷 97-117页

作者： Ramin Vaghei Farzad Hejazi Hafez Taheri mohd Saleh Jaafar Farah Nora Aznieta abdul Aziz Civil Department Engineering Faculty University Putra Malaysia Serdang Selangor 43400 Malaysia

The Industrialized Building System （IBS） was recently introduced to minimize the time and cost of project construction. Accordingly, ensuring the integration of the connection of precast components in IBS structures is an important factor that ensures stability of buildings subjected to dynamic loads from earthquakes, vehicles, and machineries. However, structural engineers still lack knowledge on the proper connection and detailed joints o fiBS structure construction. Therefore, this study proposes a special precast concrete wall-to-wall connection system for dynamic loads that resists multidirectional imposed loads and reduces vibration effects （PI2014701723）. This system is designed to connect two adjacent precast wall panels by using two steel U-shaped channels （i.e., male and female joints）. During casting, each joint is adapted for incorporation into a respective wall panel after considering the following conditions： one side of the steel channel opens into the thickness face of the panel; a U-shaped rubber is implemented between the two channels to dissipate the vibration effect; and bolts and nuts are used to create an extension between the two U-shaped male and female steel channels. The developed finite element model of the precast wall is subjected to cyclic loads to evaluate the performance of the proposed connection during an imposed dynamic load. Connection performance is then compared with conventional connections based on the energy dissipation, stress, deformation, and concrete damage in the plastic range. The proposed precast connection is capable of exceeding the energy absorption of precast walls subjected to dynamic load, thereby improving its resistance behavior in all principal directions.

关键词： industrial building system precast concrete structure precast wall connection finite element method nonlinear analysis energy dissipation concrete damage plasticity

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New coating formulation for the slow release of urea using a mixture of gypsum and dolomitic limestone

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Particuology 2015年第6期13卷 62-67页

作者： Farahnaz Eghbali Babadi Robiah Yunus Suraya abdul Rashid Mohamad Amran mohd Salleh Salmiaton Ali Institute of Advanced Technology Universiti Putra Malaysia Selangor 43400 Malaysia Departments of Chemical and Environmental Engineering Faculty of Engineering Universiti Putra Malaysia Selangor 43400 Malaysia

The use of urea and urea-based fertilizers has increased considerably over the past 15 years. They cur- rently account for approximately 51% of the world＇s agricultural nitrogen consumption. However, about 20-70% of the applied urea fertilizer is lost to the environment, causing serious pollution and increasing costs. These losses come from leaching, decomposition, and ammonium volatilization in the soil during handling and storage. Controlled release by coating can be used to increase urea fertilizer efficiency. We studied the use of gypsum, sulfur, and ground magnesium lime as cost-effective coating materials. All these coating materials contain nutrients required by plants. The effects of the coating composition and proportion of sealant on the rate of urea release and the crushing strength of the coated urea were investigated. We found that coated urea with the same proportion of gypsum-ground magnesium lime （GML） exhibited low urea release and high crushing strength. The performance was enhanced when using polyols as a sealant on the surface of the coated urea. A surface morphology analysis indicated a uniform and smooth surface on the coated film. The efficiency of the coated urea improved by 34.2% when using gypsum-GML （ 1：1 ratio） containing 1.1% oolvols.

关键词： Ground magnesium lime Crushing strength Rotary pan SealantPolyol

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Real traffic-data based evaluation of vehicular traffic environment and state- of-the-art with future issues in location-centric data dissemination for VANETs

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Digital Communications and Networks 2017年第3期3卷 195-210页

作者： abdul Hafidz abdul Hanan mohd. Yazid Idris Omprakash Kaiwartya Mukesh Prasad Rajiv Ratn Shah Faculty of Computing Universiti Teknologi Malaysia (UTM) 81310 Skudai Johor Malaysia Centre for Artificial Intelligence University of Technology Sydney Australia School of Computing National University of Singapore (NUS) 117417 Republic of Singapore

Extensive investigation has been performed in location-centric or geocast routing protocols for reliable and efficient dissemination of information in Vehicular Adhoc Networks （VANETs）. Various location-centric routing protocols have been suggested in literature for road safety ITS applications considering urban and highway traffic environment. This paper characterizes vehicular environments based on real traffic data and investigates the evolution of location-centric data dissemination. The current study is carded out with three main objectives：（i） to analyze the impact of dynamic traffic environment on the design of data dissemination techniques, （ii） to characterize location-centric data dissemination in terms of functional and qualitative behavior of protocols, properties, and strengths and weaknesses, and （iii） to find some future research directions in information dissemination based on location. Vehicular traffic environments have been classified into three categories based on physical characteristics such as speed, inter-vehicular distance, neighborhood stability, traffic volume, etc. Real traffic data is considered to analyze on-road traffic environments based on the measurement of physical parameters and weather conditions. Design issues are identified in incorporating physical parameters and weather conditions into data dissemination. Functional and qualitative characteristics of location-centric techniques are explored considering urban and highway environments. Comparative analysis of location-centric techniques is carded out for both urban and highway environments individually based on some unique and common characteristics of the environments. Finally, some future research directions are identified in the area based on the detailed investigation of traffic environments and location-centric data dissemination techniques.

关键词： location-centric data dissemination Geocast routing Vehicular ad hoc networks Analysis of real traffic data VANETs survey Evolution of geocast routing

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A review on 3D terrain visualization of GIS data:techniques and software

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Geo-Spatial Information Science 2012年第2期15卷 105-115页

作者： Che Mat RUZINOOR abdul Rashid Mohamed SHARIFF Biswajeet PRADHAN Mahmud RODZI AHMAD mohd Shafry mohd RAHIM Geospatial Information Science Research Centre(GISRC) Faculty of EngineeringUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia College of Arts and Sciences Universiti Utara Malaysia06010 UUM SintokKedahMalaysia Department of Civil Engineering Faculty of EngineeringUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Faculty of Computer Science&Information Systems Universiti Teknologi Malaysia81310 UTM SkudaiJohorMalaysia

3D terrain visualization of geographic information systems(GIS)data has become an important issue in recent *** is due to the emergence of new geo-browsers such as Google Earth,widely popular among *** availability of 3D representation tools has increased the demand for 3D terrain *** aim of this paper is to review the literature related to the 3D terrain visualization of GIS data from the first map produced until the online mapping *** reviews are divided into four different sections:manual visualization of 3D terrain,automated visualization of 3D terrain,online visualization of 3D terrain,and software for visualizing 3D ***,the paper compares between the different types of systems developed by various authors based on the capabilities and the limitations of the *** of the techniques have their own strengths and limitations which solve the problem in 3D terrain ***,the research on improving 3D terrain visualization is still *** is due to the popularity of online environments and mobile devices that render 3D *** review paper will help interested users understand the current state of 3D terrain visualization of GIS data in a better way.

关键词： terrain visualization geographic information systems(GIS) 3D terrain visualization online 3D terrain visualization remote sensing Malaysia

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Evolution of specific RNA aptamers via SELEX targeting recombinant human CD36 protein:A candidate therapeutic target in severe malaria

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Asian Pacific Journal of Tropical Biomedicine 2020年第1期10卷 23-32页

作者： Nik abdul Aziz Nik Kamarudin Judy Nur Aisha Sat Nur Fatihah mohd Zaidi Khairul mohd Fadzli Mustaffa Institute for Research in Molecular Medicine(INFORMM) Health CampusUniversiti Sains Malaysia16150Kubang KerianKelantanMalaysia

Objective:To isolate and characterize RNA aptamers that are specific to human CD36 protein using systematic evolution of ligands by exponential enrichment(SELEX)technology to identify candidates for adjunct therapy to reverse the binding of Plasmodiuminfected ***:RNA aptamers were isolated using nitrocellulose membrane-based SELEX and binding analysis was screened using an electrophoretic mobility shift assay and enzyme-linked oligonucleotide ***:Thirteen cycles of nitrocellulose membrane-based SELEX yielded three aptamers(RC60,RC25,RC04)exhibiting high binding against CD36 protein as shown on electrophoretic mobility shift *** sequence analysis revealed a G-quadruplex sequence within all the isolated aptamers that might contribute to aptamer binding and thermodynamic *** specificity assay further showed that RC60 and RC25 were highly specific to *** competitive inhibition assay demonstrated that RC60 and RC25 shared a similar binding epitope recognized by m Ab FA6-152,a specific monoclonal antibody against ***:RC60 and RC25 are promising candidates as anticytoadherence for severe malaria adjunct therapy.

关键词： RNA aptamers SELEX CD36 protein Severe malaria Adjunct therapy Cytoadherence

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Pharmacologic inducers of the uric acid exporter ABCG2 as potential drugs for treatment of gouty arthritis

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Asian Journal of Pharmaceutical Sciences 2020年第2期15卷 173-180页

作者： Bojana Ristic mohd omar Faruk Sikder Yangzom D.Bhutia Vadivel Ganapathy Department of Cell Biology and Biochemistry Texas Tech University Health Sciences CenterLubbockTX 79430United States

Uric acid is the end product of purine catabolism and its plasma levels are maintained below its maximum solubility in water(6–7 mg/dl).The plasma levels are tightly regulated as the balance between the rate of production and the rate of excretion,the latter occurring in urine(kidney),bile(liver)and feces(intestinal tract).Reabsorption in kidney is also an important component of this *** excretion and reabsorption are mediated by specific *** of the balance between production and excretion leads to hyperuricemia,which increases the risk of uric acid crystallization as monosodium urate with subsequent deposition of the crystals in joints causing gouty ***-of-function mutations in the transporters that mediate uric acid excretion are associated with *** ATP-Binding Cassette exporter ABCG2 is important in uric acid excretion at all three sites:kidney(urine),liver(bile),and intestine(feces).Mutations in this transporter cause gout and these mutations occur at significant prevalence in general ***,mutations that are most prevalent result only in partial loss of transport ***,if the expression of these partially defective transporters could be induced,the increased number of the transporter molecules would compensate for the mutation-associated decrease in transport function and hence increase uric acid *** such,pharmacologic agents with ability to induce the expression of ABCG2 represent potentially a novel class of drugs for treatment of gouty arthritis.

关键词： Uric acid excretion Intestine ABCG2 Loss-of-function mutations Gouty arthritis Pharmacologic inducers

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Characterization of Nitrogen Uptake Pattern in Malaysian Rice MR219 at Different Growth Stages Using ^(15)N Isotope

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Rice science 2015年第5期22卷 250-254页

作者： Mohammad Mu'az HASHIM mohd Khanif YUSOP Radziah OTHMAN Samsuri abdul WAHID Department of Land Management Faculty of Agriculture University Putra Malaysia

Nitrogen （N） use efficiency is usually less than 50%, and it remains a major problem in rice cultivation. Controlled release fertilizer （CRF） technology is one of the well-known efforts to overcome this problem. The efficiency of CRF, however, is very much dependent on the timing of nutrient release. This study was conducted to determine the precise time of N uptake by rice as a guideline to develop efficient CRF. Fertilizer N uptake by rice at different growth stages was investigated by using 15N isotopic technique. Rice was planted in pots, with 15N urea as N source at the rate of 120 kg/hm2. Potassium and phosphorus were applied at the same rate of 50 kg/hm2. Standard agronomic practices were employed throughout the growing periods. Rice plants were harvested every two weeks until maturation at the 14th week and analyzed for total N and 15N content. Nitrogen derived from fertilizer was calculated. Total N uptake in plants consistently increased until the 11th week. After that, it started to plateau and finally declined. Moreover, N utilization by rice plants peaked at 50%, which occurred during the 11th week after transplanting. N derived from fertilizer in rice plants were in the range of 18.7% to 40.0% in all plant tissues. The remaining N was derived from soil. Based on this study, N release from CRF should complete by the 11th week after planting to ensure the maximum fertilizer N uptake by rice plants. Efficient CRF should contribute to higher N derived from fertilizer which also resulted in a higher total N uptake by rice plants, increasing the potential of rice to produce higher yield while at the same time of reducina loss.

关键词： nitrogen use efficienc rice controlled release fertilizer 15N isotope

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