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Frontiers of Nursing 2024年第3期11卷 275-284页

作者： Maheshika Madhuwanthi Sunethra Jayathilake Neranga Liyanaarachchige Rohana Marasinghe Faculty of Graduate Studies University of Sri JayewardenepuraNugegodaSri Lanka Department of Nursing and Midwifery Faculty of Allied Health SciencesUniversity of Sri JayewardenepuraNugegodaSri Lanka sri lanka college of health informatics ColomboSri Lanka Department of Medical Education Faculty of Medical SciencesUniversity of Sri JayewardenepuraNugegodaSri Lanka

Objective:Validation is an important aspect of an instrument,and it ensures the confidence of researchers to employ the instrument in their *** study was conducted to develop and validate an instrument to assess knowledge,attitudes,and practices(KAP) on digital health among nurses since digital health capacity is a major concern in health care that needs to be ***:We conducted a methodological study to assess the content validity and reliability of the ***,items were generated through a comprehensive literature review and by obtaining an expert ***,content and face validity were assessed by a panel of 7 *** the item-level content validity index(I-CVI) and the scale-level content validity index(S-CVI) were ***,test–retest reliability and internal consistency of the instrument were *** were analyzed using SPSS version ***:The initial pool consisted of 60 items and after obtaining content,face,and construct validity,51 items *** with an I-CVI health among healthcare professionals.

关键词： assess development digital health instrument validations

Antimicrobial susceptibility and serotypes of Neisseria meningitidis and Streptococcus pneumoniae in sri lanka:Experience from the National Reference Laboratory

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Asian Pacific Journal of Tropical Medicine 2022年第3期15卷 114-120页

作者： Lilani Karunanayake Veeraraghavan Balaji K.D.N.Gunawardana Rosemol Varghese Vayishnavi Ariram Malka Dassanayake Vaithehi Rajeevan Francis Lakmini Yapa Chamika Herath Nambage Shirani Chandrasiri Priyanka Wimalagunawardhana K.Dhananja Namalie C.T.Hapuarachchi Department of Bacteriology Medical Research InstituteColomboSri Lanka Department of Microbiology Christian Medical CollegeVelloreIndia Lady Ridgeway Children’s Hospital ColomboSri Lanka Department of Pathophysiology Faculty of Healthcare SciencesEastern UniversitySri Lanka Teaching Hospital AnuradhapuraSri Lanka District General Hospital MoneragalaSri Lanka Colombo South Teaching Hospital KalubowilaSri Lanka District General Hospital PolonnaruwaSri Lanka North Colombo Teaching Hospital RagamaSri Lanka District General Hospital MannarSri Lanka

Objective:To determine the antimicrobial susceptibility and serotypes of Neisseria(N.)meningitidis and Streptococcus(S.)pneumoniae in sri lankan ***:We retrospectively analyzed 11 blood culture specimens from suspected patients with invasive meningococcal disease and 26 *** clinical *** tested 6 antimicrobials against *** and 12 antimicrobials against *** serogroup was determined by realtime PCR and Quellung serotyping was used for pneumococcal ***:*** serogroup B was the most common in this ***-susceptibility to penicillin was seen in 75.0%(6/8)of *** to ciprofloxacin,levofloxacin and cotrimoxazole was 62.5%(5/8),62.5%(5/8)and 87.5%(7/8),*** susceptibility was seen in cefotaxime and *** ***,the most common serotype was 19F in both invasive and non-invasive pneumococcal *** majority of strains showed multidrug *** non-susceptibility in non-meningeal strains were 13.6%and all meningeal strains were penicillin *** was highly resistant in both *** showed excellent susceptibility in non-invasive pneumococcal diseases ***,levofloxacin and vancomycin showed 100.0%susceptibility in all pneumococcal ***:Implementation of vaccines should be considered,especially for children and high-risk *** may contribute to reducing pneumococcal and meningococcal invasive disease burden and help prevent emergence of antimicrobial resistant strains.

关键词： Neisseria meningitidis Streptococcus pneumoniae sri lanka Antimicrobial resistance Serotypes Invasive bacterial diseases

Naïve Bayes Algorithm for Large Scale Text Classification

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Instrumentation 2021年第4期8卷 55-62页

作者： Pirunthavi SIVAKUMAR Jayalath EKANAYAKE Department of Information and Communication Technology Faculty of TechnologyRajarata University of Sri LankaMihintale 50300Sri Lanka Department of Computer Science and informatics Faculty of Applied SciencesUva Wellassa University of Sri LankaBadulla 90000Sri Lanka

This paper proposed an improved Naïve Bayes Classifier for sentimental analysis from a large-scale dataset such as in *** contains large unstructured and unorganized comments and reactions,which carry important *** large amounts of data and extracting useful information is a challenging *** extracted information can be considered as new knowledge and can be used for deci *** extract comments from YouTube on videos and categorized them in domain-specific,and then apply the Naïve Bayes classifier with improved *** method provided a decent 80%accuracy in classifying those *** experiment shows that the proposed method provides excellent adaptability for large-scale text classification.

关键词： Naïve Bayes Text Classification YouTube Sentimental Analysis

Machine Learning Enabled Novel Real-Time IoT Targeted DoS/DDoS Cyber Attack Detection System

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Computers, Materials & Continua 2024年第9期80卷 3655-3683页

作者： Abdullah Alabdulatif Navod Neranjan Thilakarathne Mohamed Aashiq Department of Cybersecurity College of ComputerQassim UniversityBuraydah51452Saudi Arabia Department of ICT Faculty of TechnologyUniversity of ColomboColombo00700Sri Lanka Department of Computer Science and Engineering Faculty of EngineeringSouth Eastern University of Sri LankaOluvil32360Sri Lanka

The increasing prevalence of Internet of Things(IoT)devices has introduced a new phase of connectivity in recent years and,concurrently,has opened the floodgates for growing cyber *** the myriad of potential attacks,Denial of Service(DoS)attacks and Distributed Denial of Service(DDoS)attacks remain a dominant concern due to their capability to render services inoperable by overwhelming systems with an influx of *** IoT devices often lack the inherent security measures found in more mature computing platforms,the need for robust DoS/DDoS detection systems tailored to IoT is paramount for the sustainable development of every domain that IoT *** this study,we investigate the effectiveness of three machine learning(ML)algorithms:extreme gradient boosting(XGB),multilayer perceptron(MLP)and random forest(RF),for the detection of IoTtargeted DoS/DDoS attacks and three feature engineering methods that have not been used in the existing stateof-the-art,and then employed the best performing algorithm to design a prototype of a novel real-time system towards detection of such DoS/DDoS *** CICIoT2023 dataset was derived from the latest real-world IoT traffic,incorporates both benign and malicious network traffic patterns and after data preprocessing and feature engineering,the data was fed into our models for both training and validation,where findings suggest that while all threemodels exhibit commendable accuracy in detectingDoS/DDoS attacks,the use of particle swarmoptimization(PSO)for feature selection has made great improvements in the performance(accuracy,precsion recall and F1-score of 99.93%for XGB)of the ML models and their execution time(491.023 sceonds for XGB)compared to recursive feature elimination(RFE)and randomforest feature importance(RFI)*** proposed real-time system for DoS/DDoS attack detection entails the implementation of an platform capable of effectively processing and analyzing network traffic in *** inv

关键词： Machine learning Internet of Things(IoT),DoS,DDoS cybersecurity intrusion prevention network security,feature optimization,sustainability

Design of a Vibration Sensor Based Train Arrival Detection System to Prevent Elephant-Train Accidents in sri lanka

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Instrumentation 2020年第4期7卷 40-47页

作者： Nuwantha.D.KULARATHNA Sisaara PERERA Institute of Engineers sri lanka college of Engineering Department of Electrical and Computer Engineering The Open University of Sri Lanka

At present,sri lanka is home to about 5,000-6,000 wild elephants roaming over close to 70%of the country’s *** this blessing,around 150 elephants die each year due to many *** main reasons for the altercations between humans and elephants are the drastic increase in the human population,human encroachment upon elephant territory for agriculture and settlements and unplanned development and transportation *** are long lived herbivores,and their survival depends upon regular migration over large distances to search for food,water,and social and reproductive *** to the sri lanka railways the average number of elephants that get killed due to elephant-railway accidents is about 9 per *** a solution for this problem,we have proposed a novel system to pass a signal to indicate the train *** proposed system detects the vibration of the locomotives and after detecting the vibration,alarm system will generate a high frequency signal within the frequency range,where the elephants are *** proposed system is a low cost device and this can be placed anywhere at any ***,this project aims to protect elephants from being harmed which usually happen due to various human activities.

关键词： Herbivore sri lanka Railway Locomotives

Bactericidal and anti-adhesive properties of culinary and medicinal plants against Helicobacter pylori

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World Journal of Gastroenterology 2005年第47期11卷 7499-7507页

作者： Rachel O'Mahony Huda Al-Khtheeri Deepaka Weerasekera Neluka Fernando Dino Vaira John Holton Christelle Basset Centre for Infectious Diseases and International health Royal Free and University College London Medical SchoolLondonUnited Kingdom Department of Surgery University of Sri JayewardenapuraColomboSri Lanka Department of Microbiology University of Sri JayewardenapuraColomboSri Lanka Department of Internal Medicine and Gastroenterology University of BolognaBolognaItaly INSERM 0114 Physiopathologie des Maladies Inflammatoires IntestinalesCHU LilleFrance

AIM： To investigate the bactericidal and anti-adhesive properties of 25 plants against Helicobacter pylori （H pylon）. METHODS： Twenty-five plants were boiled in water to produce aqueous extracts that simulate the effect of cooking. The bactericidal activity of the extracts was assessed by a standard kill-curve with seven strains of H pylori. The anti-adhesive property was assessed by the inhibition of binding of four strains of FITC-labeled Hpylori to stomach sections. RESULTS： Of all the plants tested, eight plants, including Bengal quince, nightshade, garlic, dill, black pepper, coriander, fenugreek and black tea, were found to have no bactericidal effect on any of the isolates. Columbo weed, long pepper, parsley, tarragon, nutmeg, yellow-berried nightshade, threadstem carpetweed, sage and cinnamon had bactericidal activities against Hpylori, but total inhibition of growth was not achieved in this study. Among the plants that killed H pylori, turmeric was the most efficient, followed by cumin, ginger, chilli, borage, black caraway, oregano and liquorice. Moreover, extracts of turmeric, borage and parsley were able to inhibit the adhesion of H pylori strains to the stomach sections. CONCLUSION： Several plants that were tested in our study had bactericidal and/or anti-adhesive effects on Hpylori. Ingestion of the plants with anti-adhesive properties could therefore provide a potent alternative therapy for H pylori infection, which overcomes the problem of resistance associated with current antibiotic treatment.

关键词： Hpylori Inhibition Adhesion Killing Plants

Implications of Salt Tectonics on Hydrocarbon Ascent in the Eastern Persian Gulf:Insights into the Formation Mechanism of Salt Diapirs,Gas Chimneys,and Their Sedimentary Interactions

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Journal of Ocean University of China 2024年第6期23卷 1515-1533页

作者： XUE Yang LUAN Xiwu RAVEENDRASINGHE Thanuja D WEI Xinyuan JIN Long YIN Jian QIAO Jianghao college of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Physical Sciences Faculty of Applied SciencesSouth Eastern University of Sri LankaSammanthurei 32200Sri Lanka college of Marine Geosciences Ocean University of ChinaQingdao 266100China

Gas chimneys,salt domes,and faults are vital to the movement of hydrocarbons within geological *** identification of these geological features is crucial to modeling hydrocarbon *** study explores the processes that have shaped the eastern Persian Gulf,focusing on salt diapir characteristics,origin,and fluid *** collisions between the Indian,Eurasian,and Arabian Plates have considerably impacted salt tectonics,developing key features such as the Hormuz salt,Qatar-South Fars Arch,and Zagros and Oman orogenic ***-related features were discerned through two-dimensional seismic data and drilling records,salt movement sequences were reconstructed,and fluid expulsion patterns were delineated using attribute *** results of this study revealed that fractured substrates influenced by regional tectonic forces contribute to the creation of salt diapirs,which serve as conduits for guided fluid ***,these results showed that gravity-driven downbuilding mainly controls salt flow,while the circular arrangement of salt structures results from regional stress and interactions between different salt *** stress-induced basement incisions compounded by the hindrance of initial salt movement by the Qatar Arch further contribute to the complex salt structure ***,the uplift of the Qatar Arch and stresses from the Oman and Zagros orogenies profoundly affect the salt structure geometry and depositional patterns across diverse regions,resulting in circular salt structures and gas *** study offers valuable perspectives for oil and gas exploration and provides a comprehensive understanding of the regional dynamics governing salt tectonics and hydrocarbon ascent in the eastern Persian Gulf.

关键词： Persian Gulf salt tectonics salt diapirs gas chimneys salt-sediment interaction fluid ascent

Serum TC/HDL-C,TG/HDL-C and LDL-C/HDL-C in predicting the risk of myocardial infarction in normolipidaemic patients in South Asia:A case-control study

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Asian Pacific Journal of Tropical Medicine 2008年第2期1卷 21-27页

作者： Arun Kumar Ramiah Sivakanesan Manipal college of Medical Sciences PokharaNepal Faculty of Medicine University of PeradeniyaSri Lanka

Dyslipidemia the major cause of atherosclerosis are suggested to act synergistically with non-lipid risk factors to increase ***-density lipoprotein cholesterol(LDL-C) is the main therapeutic target in the prevention of *** triglycerides(TG) and decreased high-density lipoprotein(LDL-C) are considered to be a major risk factor for the development of insulin resistant and metabolic *** the TG/ HDL-C ratio has been used in recent studies as a clinical indicator for insulin resistance,results were inconsistent. The TG/HDL-C ratio is also widely used to assess the lipid *** ever the utility of this rate for predicting coronary heart disease(CHD) risk is not *** encountered myocardial infarct patients with normal serum lipid concentration so this study was undertaken to evaluate the usefulness of these lipid ratios in predicting CHD risk in normolipidemic AMI patients and to compare the results with healthy *** aim of the present study was to evaluate serum TC/HDL-C,TG/HDL-C and LDL-C/HDL-C in myocardial infarct subjects with normal lipid *** study this,lipid profile was determined in 165 normolipidemic acute myocardial infarction patients and 165 age/sex-matched *** cholesterol,triglycerides,and HDL-cholesterol were analyzed enzymatically using kits obtained from Randox Laboratories Limited,Crumlin,UK. Plasma LDL-cholesterol was determined from the values of total cholesterol and HDL- cholesterol using the friedwalds *** values were expressed as means±standard deviation(SD) and data from patients and controls was compared using students *** results and conclusion of the study were:Total cholesterol, TC:HDL-C ratio,triglycerides,LDL-cholesterol,LDL:HDL-C ratio were higher in MI patients(p<0. 001).HDL-C concentration was significantly lower in MI patients than controls(p<0.001).Higher ratio of TC/HDL-C,TG/HDL-C and LDL-C/HDL-C was observed in AMI patients compared to c

关键词： TC/HDL-C TG/HDL-C LDL-C/HDL-C acute myocardial infarction normal lipid profile

Probability Enhanced Entropy(PEE) Novel Feature for Improved Bird Sound Classification

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Machine Intelligence Research 2022年第1期19卷 52-62页

作者： Ramashini Murugaiya Pg Emeroylariffion Abas Liyanage Chandratilak De Silva faculty of Integrated Technologies Universiti Brunei DarussalamBandar Seri Begawan BE1410Brunei Darussalam Department of Computer Science and informatics Uva Wellassa UniversityBadulla 90000Sri Lanka

Identification of bird species from their sounds has become an important area in biodiversity-related research due to the relative ease of capturing bird sounds in the commonly challenging habitat. Audio features have a massive impact on the classification task since they are the fundamental elements used to differentiate classes. As such, the extraction of informative properties of the data is a crucial stage of any classification-based application. Therefore, it is vital to identify the most significant feature to represent the actual bird sounds. In this paper, we propose a novel feature that can advance classification accuracy with modified features, which are most suitable for classifying birds from its audio sounds. Modified Gammatone frequency cepstral coefficient(GTCC) features have been extracted with their frequency banks adjusted to suit bird sounds. The features are then used to train and test a support vector machine(SVM) classifier. It has been shown that the modified GTCC features are able to give 86% accuracy with twenty Bornean birds. Furthermore, in this paper, we are proposing a novel probability enhanced entropy(PEE) feature, which, when combined with the modified GTCC features, is able to improve accuracy further to 89.5%. These results are significant as the relatively low-resource intensive SVM with the proposed modified GTCC, and the proposed novel PEE feature can be implemented in a real-time system to assist researchers,scientists, conservationists, and even eco-tourists in identifying bird species in the dense forest.

关键词： Bird sounds classification Gammatone frequency cepstral coefficient(GTCC) probability enhanced entropy(PEE) support vector machine(SVM)

Characterization and Selection of Phosphorus Deficiency Tolerant Rice Genotypes in sri lanka

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Rice science 2016年第4期23卷 184-195页

作者： Y. C. ALUWIHARE M. ISHAN M. D. M. CHAMIKARA C. K. WEEBADDE D. N. SIRISENA W. L. G. SAMARASINGHE S. D. S. S. SOORIYAPATHIRANA Department of Molecular Biology and Biotechnology Faculty of Science University of Peradeniya Peradeniya 20400 Sri Postgraduate Institute of Science University of Peradeniya Peradeniya 20400 Sri Lanka Departments of Plant Soil and Microbial Sciences and Horticulture College of Agriculture and Natural Resources Michigan State University East LansingMichigan 48824 USA Rice Research and Development Institute Bathalagoda Ibbagamuwa 60500 Sri Lanka

Phosphorus(P) deficiency in soil is a major constrain for rice production. An important set of rice genotypes(landraces, old improved and new improved varieties) were screened for P deficiency tolerance in two major cropping seasons of sri lanka, in 2012. The Ultisol soil, which was collected from a plot cultivated with rice without fertilizer application for past 40 years(P_0) at the Rice Research and Development Institute(RRDI), Bathalagoda, sri lanka, was used as the potting medium for greenhouse trials. Two field trials were conducted in the same plots at RRDI. Both P_0 and P_(30)(30 mg/kg P_2O_5) conditions were used in the two greenhouse trials. At the early vegetative(three weeks after transplanting), late vegetative(six weeks after transplanting) and flowering stages, plant height and number of tillers per plant were recorded. At the flowering stage, shoots were harvested and shoot dry weight, shoot P concentration, shoot P uptake and P utilization efficiency were measured. All data were statistically analyzed using analysis of variance, regression and cluster procedures. The measured parameters were significantly different between P_0 and P_(30) conditions(P < 0.05). Higher shoot dry weight was reported by the rice genotypes H4 and Marss under P_0 conditions. The regression analysis between shoot dry weight and P utilization efficiency revealed that the studied rice genotypes could be categorized to three P deficiency tolerance classes. A total of 13 genotypes could be considered as highly tolerant and 4 genotypes as sensitive for P deficiency. These results could be used to select parental genotypes for breeding and genetic studies and also to select interesting varieties or landraces for organic rice production.

关键词： phosphorus tolerance rice genotype phosphorus utilization efficiency landrace