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Automatic area estimation of algal blooms in water bodies from UAV images using texture analysis

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Water Science and Engineering 2024年第1期17卷 62-71页

作者： Ajmeria Rahul Gundu Lokesh Siddhartha Goswami R.N.Ponnalagu radhika Sudha Department of Electrical and Electronics Engineering Birla Institute of Technology&SciencePilani Hyderabad CampusTelangana 500078India

Algal blooms,the spread of algae on the surface of water bodies,have adverse effects not only on aquatic ecosystems but also on human life.The adverse effects of harmful algal blooms(HABs)necessitate a convenient solution for detection and monitoring.Unmanned aerial vehicles(UAVs)have recently emerged as a tool for algal bloom detection,efficiently providing on-demand images at high spatiotemporal resolutions.This study developed an image processing method for algal bloom area estimation from the aerial images(obtained from the internet)captured using UAVs.As a remote sensing method of HAB detection,analysis,and monitoring,a combination of histogram and texture analyses was used to efficiently estimate the area of HABs.Statistical features like entropy(using the Kullback-Leibler method)were emphasized with the aid of a gray-level co-occurrence matrix.The results showed that the orthogonal images demonstrated fewer errors,and the morphological filter best detected algal blooms in real time,with a precision of 80%.This study provided efficient image processing approaches using on-board UAVs for HAB monitoring.

关键词： Algal bloom Image processing Texture analysis Histogram analysis Unmanned aerial vehicles

Clinical competency:perceptions of nursing interns and clinical mentors

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Frontiers of Nursing 2024年第1期11卷 105-110页

作者： Jackline Prathibha radhika R.Pai Linu Sara George Fundamentals of Nursing Manipal College of NursingManipal Academy of Higher EducationManipalKarnataka 576104India

Objective:To assess the clinical competency of nursing interns and the perception of clinical nurse mentors toward student nurses'clinical competency.Methods:A study was carried out among 104 nursing interns and 26 clinical nurse mentors using the purposive sampling technique.A self-repor ted perception scale was used to collect the data.Results:In general,most nursing interns perceived themselves as clinically competent during the internship.The clinical nurse mentors too repor ted that the current internship is helping the nursing interns in becoming competent.Conclusions:Frequent clinical evaluation,buddy system,provision of stipends,good leadership,and coordination between the academic institute and hospital are repor ted as the critical motivating factors for improving the clinical competency of student interns.

关键词： clinical competency clinical nurse mentors competence internship nursing interns perception

Influence of carbide ceramic reinforcements in improving tribological properties of A333 graded hybrid composites

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Defence Technology（防务技术） 2022年第7期18卷 1107-1123页

作者： Manu Sam N.radhika Department of Mechanical Engineering Amrita School of EngineeringCoimbatore641112Amrita Vishwa VidyapeethamIndia

Aluminium hybrid functionally graded metal matrix composites(FGMMCs),meet growing demands for supreme tribo-mechanical performance in automotive and aviation industry.This research experimentally compares the influence of carbide ceramics(B_(4)C,SiC,TiC)as reinforcements,in improving reciprocating tribology performance and mechanical strength of A333 hybrid composites against alloy.Hollow cylindrical samples of A333/6 wt%B_(4)C/4 wt%TiC and A333/6 wt%B_(4)C/4 wt%SiC hybrid FGMMCs were developed using horizontal centrifugal casting.Metallography analysis on both composites revealed increasing ceramic gradient distribution towards outer composite wall.Particle rich zone of A333/B_(4)C/SiC hybrid FGMMC showed maximum micro-hardness(198.9 HV)and tensile strength(267.9 MPa).Elemental mapping confirmed effective distribution of ceramics and detected elemental composition of both composites.Particle rich layer of A333/B_(4)C/SiC hybrid FGMMC exhibited improved wear resistance in comparison with all three layers of A333/B_(4)C/TiC hybrid FGMMC and alloy.Third-body abrasion and tribo-chemical wear were the predominant mechanisms revealed for both composites during worn surface analysis.

关键词： Composites Functional Wear Carbide ceramics

Modified Elliptic Curve Cryptography Multi-Signature Scheme to Enhance Security in Cryptocurrency

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Computer Systems Science & Engineering 2023年第4期45卷 641-658页

作者： G.Uganya radhika Baskar Department of Electronics and Communication Engineering Saveetha School of EngineeringSIMATSChennaiTamil NaduIndia

Internet of Things(IoT)is an emerging technology that moves the world in the direction of smart things.But,IoT security is the complex problem due to its centralized architecture,and limited capacity.So,blockchain technology has great attention due to its features of decentralized architecture,transparency,immutable records and cryptography hash functions when combining with IoT.Cryptography hash algorithms are very important in blockchain technology for secure transmission.It converts the variable size inputs to a fixed size hash output which is unchangeable.Existing cryptography hash algorithms with digital signature have issues of single node accessibility and accessed up to 128 bytes of key size only.As well as,if the attacker tries to hack the key,it cancels the transaction.This paper presents the Modified Elliptic Curve Cryptography Multi Signature Scheme(MECC-MSS)for multiple node accessibility by finding nearest path for secure transaction.In this work,the input key size can be extended up to 512 bytes to enhance the security.The performance of the proposed algorithm is analyzed with other cryptography hash algorithms like Secure Hashing Algorithms(SHAs)such as SHA224,SHA256,SHA384,SHA512,SHA3-224,SHA3-256,SHA3-384,SHA3-512 and Message Digest5 by one-way analysis of variance test in terms of accuracy and time complexity.Results show that the MECC-MSS achieves 90.85%of accuracy and time complexity of 1.4 nano seconds with significance less than 0.05.From the statistical analysis,it is observed that the proposed algorithm is significantly better than other cryptography hash algorithms and also having less time complexity.

关键词： Internet of things blockchain technology secure hash algorithm accuracy time complexity

Changes in trends of orthopedic services due to the COVID-19 pandemic: A review

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World Journal of Orthopedics 2022年第11期13卷 955-968页

作者： Eunice Obamiro radhika Trivedi Nasim Ahmed Department of Surgery Division of Trauma&Surgical Critical CareJersey Shore University Medical CenterNeptuneNJ 07754United States Department of Surgery Hackensack Meridian School of MedicineNutleyNJ 07110United States

As of June 10,2022,the World Health Organization has recorded over 532 million documented coronavirus disease 2019(COVID-19)[(Coronavirus)SARS-CoV-2]cases and almost 6.3 million deaths worldwide,which has caused strain on medical specialties globally.The aim of this review is to explore the impact that COVID-19 has had on orthopedic practices.Providers observed a rapid decline in the number of orthopedic patients’admissions due to cancellation of elective procedures;however,emergent cases still required treatment.Various observational studies,case reports,and clinical trials were collected through a PubMed database search.Additional sources were found through Google.The search was refined to publications in English and between the years of 2019 and 2021.The keywords used were“COVID-19”and/or“Orthopedic Injuries”.Thirty-seven studies were retained.The pandemic brought on significant changes to the mechanism of injury,number of admissions,type of injuries,and patient outcomes.Mortality rates significantly increased particularly amongst patients with hip fractures and COVID-19.Road traffic injuries remained a common cause of injury and domestic injuries became more prevalent with lockdown.Social isolation negatively affected mental health resulting in several orthopedic injuries.Telehealth services and separation for COVID-positive and COVID-negative patients benefited both patients and providers.While hospitals and medical facilities are still facing COVID-19 case surges,it is important to understand how this pandemic has impacted preparation,care,and opportunities for prevention education and ongoing care.

关键词： Orthopedics Surgery Lockdown Mental health Telehealth COVID-19

Performance Analysis and Throughput Enhancement of the STET Technique for WLAN IEEE 802.11ad

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Computer Systems Science & Engineering 2022年第2期40卷 571-579页

作者： M.Vanitha J.Kirubakaran K.radhika Department of Electronics and Communication Engineering Saveetha Engineering CollegeChennai602105India Department of Electronics and Communication Engineering Muthayammal Engineering CollegeRasipuram637408India

The IEEE 802.11ad innovation has enabled the impact of remote devices in unauthorized 60 GHz unlicensed frequency band at Giga bits per second information transfer rate in speed concentrated 5G applications.We have presented an innovative work that deals with the upgradation of the ability of IEEE 802.11ad wireless LAN to make it suitable for wireless applications.An exact examination on the IEEE 802.11ad analysis has been carried out in this work to achieve the greatest throughput.This has pulled attraction in broad consideration for accomplishing the pinnacle transmission rate of 8 Gbit/s.IEEE 802.11ad is a convention utilized for extremely high information rates(around 8 Gbit/s)and for short range remote correspondence of around 1 to 10 meters.The Multi-layer with Multi-User Multiple Input Multiple-Output(MLMU-MIMO)innovation has enabled transmission of multiple information packets all the while from the WLAN IEEE 802.11 ad Access Point(AP)to various receivers by means of different wireless applications.To help the MLMU-MIMO innovation at Medium Access Control(MAC),a new method called Simultaneous Transmission for Enhanced Throughput(STET)has been presented for enhancement of the transmission rate of the wireless standard.A mathematical model has been used for the evaluation of the performance of an IEEE 802.11ad AP empowering the STET allocation technique.This STET model can help determination of the throughput improvement of a STET technique,for example,audio information,images,good quality and foundation impact.The main goal of this work is to analyze the improvement of the STET allocation technique in regard to the usage of rare frequency band,when obtaining spectrum access between the various access points.The theoretical and simulation outcomes are also confirmed by Riverbed modeler 17.5 simulation tool.

关键词： WLAN STET MAC

Data Mining with Privacy Protection Using Precise Elliptical Curve Cryptography

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Intelligent Automation & Soft Computing 2023年第1期35卷 839-851页

作者： B.Murugeshwari D.Selvaraj K.Sudharson S.radhika Department of Computer Science and Engineering Velammal Engineering CollegeChennai600066India Department of Electronics and Communication Engineering Panimalar Engineering CollegeChennai600123India Department of Information Technology Velammal Insitutue of TechnologyChennai601204India Department of Computer Science and Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai600124India

Protecting the privacy of data in the multi-cloud is a crucial task.Data mining is a technique that protects the privacy of individual data while mining those data.The most significant task entails obtaining data from numerous remote databases.Mining algorithms can obtain sensitive information once the data is in the data warehouse.Many traditional algorithms/techniques promise to provide safe data transfer,storing,and retrieving over the cloud platform.These strategies are primarily concerned with protecting the privacy of user data.This study aims to present data mining with privacy protection(DMPP)using precise elliptic curve cryptography(PECC),which builds upon that algebraic elliptic curve infinitefields.This approach enables safe data exchange by utilizing a reliable data consolidation approach entirely reliant on rewritable data concealing techniques.Also,it outperforms data mining in terms of solid privacy procedures while maintaining the quality of the data.Average approximation error,computational cost,anonymizing time,and data loss are considered performance measures.The suggested approach is practical and applicable in real-world situations according to the experimentalfindings.

关键词： Data mining cryptography privacy preserving elliptic curve information security

The 2020 US cancer screening deficit and the timing of adults’ most recent screen: a population-based cross-sectional study

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Family Medicine and Community Health 2023年第3期11卷 10-30页

作者： Jason Semprini radhika Ranganathan Health Management&Policy The University of Iowa College of Public HealthIowa CityIowaUSA Epidemiology/Biostatistics University of South Carolina Arnold School of Public HealthColumbiaSouth CarolinaUSA

Objective In 2020,cancer screenings declined,resulting in a cancer screening deficit.The significance of this deficit,however,has yet to be quantified from a population health perspective.Our study addresses this evidence gap by examining how the pandemic changed the timing of American adults’most recent cancer screen.Methodology We obtained population-based,cancer screening data from the Behavioural Risk Factor Surveillance System(BRFSS)(2010,2012,2014,2016,2018,2020).Mammograms,pap smears and colonoscopies were each specified as a variable of mutually exclusive categories to indicate the timing since the most recent screening(never,0–1 years,1–2 years,3+years).Our cross-sectional,quasi-experimental design restricts the sample to adults surveyed in January,February or March.We then leverage a quirk in the BRFSS implementation and consider adults surveyed in the second year of the 2020 survey wave as exposed to the COVID-19 pandemic.Respondents surveyed in January 2020–March 2020 were considered unexposed.To estimate the impact of exposure to the COVID-19 pandemic on the timing of recent cancer screenings,we constructed linear and logistic regression models which control for sociodemographic characteristics associated with screening patterns,and state fixed effects and temporal trend fixed effects to control for confounding.Results In 2020,the cancer screening deficit was largely due to a 1year delay among adults who receive annual screening,as the proportion of adults reporting a cancer screen in the past year declined by a nearly identical proportion of adults reporting their most recent cancer screen 1–2 years ago(3%–4%points).However,the relative change was higher for mammograms and pap smears(17%)than colonoscopies(4%).We also found some evidence that the proportion of women reporting never having completed a mammogram declined in 2020,but the mechanisms for this finding should be further explored with the release of future data.Conclusion Our estimates for the pandemic’s effect on cancer screening rates are

关键词： sectional screening founding

Nicotinamide adenine dinucleotide phosphate oxidase activation and neuronal death after ischemic stroke

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Neural Regeneration Research 2019年第6期14卷 948-953页

作者： Jiamei Shen radhika Rastogi Xiaokun Geng Yuchuan Ding China-America Institute of Neuroscience Beijing Luhe HospitalCapital Medical University Department of Neurosurgery Wayne State University School of Medicine Department of Neurology Beijing Luhe HospitalCapital Medical University

Nicotinamide adenine dinucleotide phosphate oxidase(NOX) is a multisubunit enzyme complex that utilizes nicotinamide adenine dinucleotide phosphate to produce superoxide anions and other reactive oxygen species. Under normal circumstances, reactive oxygen species mediate a number of important cellular functions, including the facilitation of adaptive immunity. In pathogenic circumstances, however,excess reactive oxygen species generated by NOX promotes apoptotic cell death. In ischemic stroke, in particular, it has been shown that both NOX activation and derangements in glucose metabolism result in increased apoptosis. Moreover, recent studies have established that glucose, as a NOX substrate, plays a vital role in the pathogenesis of reperfusion injury. Thus, NOX inhibition has the potential to mitigate the deleterious impact of hyperglycemia on stroke. In this paper, we provide an overview of this research,coupled with a discussion of its implications for the development of NOX inhibition as a strategy for the treatment of ischemic stroke. Both inhibition using apocynin, as well as the prospect of developing more specific inhibitors based on what is now understood of the biology of NOX assembly and activation, will be highlighted in the course of our discussion.

关键词： nicotinamide adenine dinucleotide phosphate oxidase stroke nicotinamide adenine dinucleotide phosphate oxidase inhibitors reactive oxygen species ischemia/reperfusion neuroprotection hyperglycolysis NADPH NOX