World Journal of Applied Science & Technology最新文献

{"title":"Dynamic analysis of malwarae intrusion in mobile devices using Adaboost Algorithm, KNN and SVM base classifiers","authors":"S.B. Oyong, U.O. Ekong, O.U. Obot","doi":"10.4314/wojast.v15i1.78","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.78","url":null,"abstract":"Cyber security is becoming more worrisome; malware is spreading by the day through proliferation and distribution of variants of known family signatures using obfuscation techniques. Mobile devices components such as central processing unit, memory, battery life, executable files and operating systems are constantly being attacked and  rendered unusable. Attack agents are specifically evading detection, damaging mobile devices’ executive files, stealing information, surcharging users for SMS sent and received without their knowledge or permission, and freezing applications for a ransom among others. This research work is keying into the fight against malware intrusion by designing and developing an intrusion detection system (IDS) using ensemble learning, boosting. Adaboost algorithm trains base classifiers (KNN and SVM) using network security laboratory-knowledge discovery in databases (NSL-KDD) dataset to build a more formidable classifier that will detect malware intrusion in mobile devices using cloud technology. The result obtained in this combination technique is 91.4% accurate with a bias (standard deviation) as low as 2.7%.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science & Technology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139219305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro antioxidant activity and hypoglycemic efficacy of the leaf, stem, and rhizome extracts of Costus igneus nak (Costaceae) in Alloxan Induced Diabetic Rats","authors":"I. Ekanem, B. Antia, E. Essien, P. Thomas","doi":"10.4314/wojast.v15i1.98","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.98","url":null,"abstract":"Costus igneus has a folk reputation in West Africa for the treatment of diabetes. Nevertheless, from our investigations, the  scientific validation of this folkloric claim has not been properly documented. The study was designed to evaluate  the  antidiabetic potentials and in vitro antioxidant capacity of the leaves, stems and rhizomes of C. igneus using ethanol  as the  extraction solvent. Phytochemical screening of the extracts was performed using standard analytical  procedures. Saponins,  tannins, flavonoids, alkaloids, and cardiac glycosides were detected in the leaves, stems, and  rhizomes of C. igneus. The  median lethal dose (LD50) of the leaf, stem, and rhizome extracts in mice were 2958. 04,  1936.49, and 5000 mg/kg,  respectively. The treatment of alloxan-induced diabetic rats with the extracts of the leaves,  stems, and rhizomes caused a  significant reduction (P<0.05) in fasting blood glucose levels (44.13, 56.21, and 61.12%),  respectively in acute study, and  76.85, 69.95, and 79.63% reduction in prolong treatment (2 weeks). The leaf and rhizome  extract also demonstrated good  antioxidant activity on 2, 2-diphenyl-1-picrylhydrazyl radicals (61 and 62%  inhibition, 100 μg/mL) and ferric reducing  capacity (absorbance, 0.541 and 0.459, 100 μg/mL), respectively. The leaves,  stems, and rhizomes of C. igneus exhibited good hypoglycaemic activity which supports their folkloric claims in the  management of diabetes mellitus. The rhizomes  extract showed the least toxicity and the most effective in the  reduction of fasting blood glucose levels. This is the first  comparative evaluation of the leaves, stems, and rhizomes of  C. igneus in a study. The findings suggest the use of the rhizomes as a better substitute than the leaves popularly  employed in herbal preparations or a combination of all the plant  parts for an effective herbal treatment. The  antioxidant capacity of this plant extracts may also be involved in the inhibition  of oxidative processes implicated in  diabetic complications.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139219504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity and distribution of vascular cryptogams in relation to elevation gradient in Osomba range of the Cross River National Park, Cross River State, Nigeria","authors":"M.E. Bassey, E. Anwana, E.O. Mbong, O.T. Umoh","doi":"10.4314/wojast.v15i1.26","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.26","url":null,"abstract":"Vascular cryptogams also known as Pteridophytes have been found to colonize the lower altitudes of world’s tropical forest regions. Hence, a study to establish the relationship existing between elevation gradient and Pteridophytes heterogeneity and distribution within Osomba Range, Cross River State, Nigeria was carried out. In this study, we  delineated four elevation  classes and enumerated the vascular cryptogam communities found at each level within the  range using standard scientific protocol. Shannon-Wiener's (3.434 and 2.833) and Simpson’s indices of diversity (0.968  and 0.941) as well as Taxa (31 and 17) assumed a dump bell pattern with peak values associated with the mid-elevation classes (178 -205m and 232 – 240m) respectively. On the contrary, dominance followed an inverted dump bell distribution with its optimum (0.1667 and 0.2500) skewed towards the extreme elevation classes (297 – 295 m and 347- 405 m). Correlation analysis imprinted a significant (P<0.05) positive relationship between altitude and dominance (0.867*) but an inverse relationship between elevation and Simpson diversity (-0.867*). 178- 205 m and 232-240 m elevation classes were more comparable with lesser species heterogeneity judging from Bray and Curtis (0.458), Simpson (0.647) and Jaccard (0.297) similarity indices respectively. Conclusively, forty-nine (49) species of vascular cryptogams were identified and their occurrence seemed patchy in distribution along the gradient. This is an indication that elevation is an important factor amongst the suite of ecological drivers which determine the diversity of this critical group of plants. Further investigation on individual species response to ecological gradient is recommended as this will enhance the conservation of these vascular cryptogams within and outside the study area.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elliptic interval Type-2 intuitionistic fuzzy logic system for non-linear system identification","authors":"I.J. Eyoh, U.A. Umoh, U.G. Inyang, O.S. Adeoye","doi":"10.4314/wojast.v15i1.48","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.48","url":null,"abstract":"An elliptic membership function has been proposed in the literature for interval type-2 fuzzy logic system. In this paper, elliptic non- membership function is incorporated into the conventional elliptic membership function model to obtain elliptic interval type-2 intuitionistic fuzzy sets for the first time. The elliptic interval type-2 intuitionistic fuzzy logic system so formed is applied for the prediction of two benchmark non-linear systems and results compared with Gaussian  interval type-2  intuitionistic fuzzy logic system. Experimental results show that the elliptic interval type-2 intuitionistic  fuzzy logic system outperforms the traditional Gaussian interval type-2 intuitionistic fuzzy logic system in the problem  instances investigated.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139224153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CoMoSAOVA: Computational model for sentiment analysis and online visibility assessment","authors":"Pius Uagbae Ejodamen, V.E. Ekong, D.E. Asuquo","doi":"10.4314/wojast.v15i1.110","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.110","url":null,"abstract":"The online visibility of a brand, product or organization could influence customers’ decision to patronize it. Online reviews are opinions or emotions of customers that reveal their perception about the product over a period of time. The manual identification of features and sentiments toward an entity is a difficult task. In this study, a computational model was proposed to measure online visibility by mining Twitter data on discourse about a corporate entity – University of The Gambia. The numbers of Twitter posts, followers, followings, likes, retweets, quotes, replies and mentions serves as metrics for online visibility assessment. A linear regression evaluation between the age of the entity’s account and the number of its followers showed 96.81% correlation. This shows that the older an active Twitter account, the higher the  chance of increasing its  followers and its visibility. Another section of the model predicts the tweet sentiment of the  entity’s followers with an  accuracy of 93.68% using support vector machine and multilayer perceptron neural network.  The computed average  sentiment score of the case study was 0.3531996 based on Valence Aware Dictionary of  sEntiment Reasoning (VADER)  model. This means that positive sentiments were expressed in discussions on various  issues where the entity was mentioned.  The model will enable decision makers understand the sentiments expressed  towards an entity. It also estimates online  visibility of the entity based on its number of followers and the accounts’  lifespan. The perceived sentiments will aid better  decisions that could advance loyalty to the entity. Future studies  would examine other computational models to predict  various Twitter features that increases an entity's online visibility.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximising offset well information in unravelling onshore geohazards indicators: Case study of the Gale field","authors":"O. Umunna, Arobo R. C. Amakiri, I. Tamunobereton-Ari, I.C. Cookey","doi":"10.4314/wojast.v15i1.104","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.104","url":null,"abstract":"An attempt is made in this study towards maximising offset wells information in unravelling onshore geohazards indicators in the Gale field. The Gale field is located about 100km north-west of Port Harcourt, Nigeria. The field consists of a highly faulted and elongated rollover anticline, bounded to the north by a regional growth fault. The data used for this study integrates the quadrature and reflectivity amplitude attributes from seismic data, with offset well data. The conventional reflectivity seismic data was 90° phase rotated to derive the quadrature volume. The quadrature seismic was considered a more appropriate reflectivity seismic attribute for use in shallow geohazard analysis as it is known for its characteristic preservation of high frequency spectrum inherent in the data. Offset wells (GALE-01, GALE-03, GALE-04, GALE-05, GALE-06, and GALE-08) analysis revealed mud losses, stuck pipe, overpull and gas cut as gathered from the daily drilling reports. These could translate to potential triggers of some geohazards where poorly managed. Review of field geotechnical report did not reveal any geohazards issues. Based on the geohazards assessment carried out for these wells; chances of encountering shallow gas for all the units as shown in the well summary is rated low. Results from a geohazards analysis indicate the presence of possible shallow gas within the area of interest and particularly along the shallow section of planned well trajectory. This is further supported by the presence of faults within the vicinity of gas bearing reservoirs at deeper level and a potential for these faults extending to the shallower interval. These faults are likely to serve as migration pathways for gas to seep to the shallower section, hence forming a potential geohazard. In addition, some of the offset wells targeting deeper gas reservoirs penetrated pockets of gas at the shallower interval that stratigraphically correlates with the shallow section that would be penetrated by the planned wells. The results of this work were used to move the proposed drilling location of the Gale planned wells to a nearby area free of shallow gas signatures.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139223952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Natural clay mineral-periwinkle activated carbon composite: Characterisation and structural insight","authors":"N. Simon, S.E. Shaibu, O.K. Fatunla, A.S. Johnson, P.A. Ekpo","doi":"10.4314/wojast.v15i1.15","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.15","url":null,"abstract":"The intricacies of a natural clay mineral-periwinkle shell activated carbon (NM-PAC) composite were examined using Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), BET surface area analysis, and Fourier Transform Infrared spectroscopy (FTIR). TEM analysis revealed irregular shaped particles with sizes of around 100 nm and relatively good distribution characteristics. Further examination with SEM supported these findings, showing a heterogeneous microstructure with activated carbon particles evenly distributed within the clay matrix. This uniform distribution was indicative of a high surface area available for adsorption. BET surface area analysis of the NM-PAC was determined to be 72.243 m2/g. FTIR analysis highlighted the presence of characteristic absorption bands related to the vibrational and rotational states of various functional groups. The broad band in the range of 3700–3000 cm-1indicated the stretching vibration of hydroxyl groups, and new bands around 1730 cm-1 , 1250 cm-1, and 1040 cm-1, suggested the presence of carbonyl, carboxyl, and phenol groups respectively. These findings provide valuable insights into the composite's structural properties and its potential for improved adsorption efficiency, particularly for the removal of polar pollutants.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139225596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of leaf extracts of Piper guineense AND Lasienthera africanum on fungal pathogens associated with spoilt fruit from Akwa Ibom State","authors":"O. Divine-Anthony, O. O. Akinmusire, K. O. Igoche, M.U. Okon","doi":"10.4314/wojast.v15i1.93","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.93","url":null,"abstract":"No Abstract.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139227700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production and characterization of plantaricin Y11 from Lactiplantibacillus Plantarum strain y11 (MW642245.1) isolated from Nigerian food samples and their applications in preserving milk","authors":"A.A. Adegoke, U.C. Ben, O.K. Fatunla","doi":"10.4314/wojast.v15i1.118","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.118","url":null,"abstract":"Bacteriocin from lactic acid bacterium (LAB) was characterized and its biopreservation assay carried out using conventional  methods and integrative approaches. About 66.7% (n=180) of the bacterial strains isolated from twelve different  fermented/non-fermented food products were potential LAB strains by biochemical characterization. The  highest bacteriocin  producing strain was selected and confirmed with 16S rRNA sequencing and submitted to GenBank  of National Center for  Biotechnology Information as Lactiplantibacillus plantarum strain Y11 (Accession number:  MW642245.1). Polymerase  Chain Reaction (PCR) revealed the presence of virulence genes (cytotoxin K and haemolysin  C) in L. plantarum Y11. The  bacteriocin produced was labelled as plantaricin Y11 with molecular weight of 1540 Da,  amino acid sequence was  NSHGTADYCVMWLIXK, and possessed the merits of wide pH stability (2–10), high thermal  stability and sensitivity to  protease. The bacteriocin showed wide spectrum of activity against bacterial reference strains  with bacteriocin activity  ranging from 3200Au/mL to 6400Au/mL. Preservative potentials of the bacteriocin  compared favourably with sodium benzoate in milk, inhibiting bacterial and fungal load compared to the control. There  was log reduction of aerobic mesophilic bacterial count of 8.02±0.15 and 8.43±0.21 Log 10 CFU/mL in milk treated with  plantaricin Y11 and sodium benzoate,  respectively. The log reductions of fungal count in plantaricin Y11 and sodium  benzoate treated milk ≥4.41±0.11 and  ≥3.1±0.2 Log 10 CFU/mL respectively. The plantaricin Y11 was then classified as  class IIa in bacteriocin classification  schemes and it sustained some organoleptic conditions of milk making it a  promising candidate for safe bio-preservatives.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139220688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutritional richness of sediments from crude oil impacted Iko River Estuary, Eastern Obolo L.G.A, Nigeria","authors":"E. Udoinyang, N. D. Ekpo, I. Akpan, I.J. Archibong, C.J. Nworie, A. O. Okon","doi":"10.4314/wojast.v15i1.129","DOIUrl":"https://doi.org/10.4314/wojast.v15i1.129","url":null,"abstract":"This was a longitudinal study that lasted twelve calendar months;and conducted in three selected stations along the course of a crude oil impacted Iko river estuary, Eastern Obolo LGA, Akwa Ibom State, Nigeria.Standard protocols were followed in collection and analysis of sediment samples. There were spatio-temporal variations in total hydrocarbon content (THC): lowest value (101.40 mgkg-1) recorded at Station 2 in October while the highest value (219.60 mgkg-1) was obtained atStation 1 in April; dry season mean value of 162.31 ± 22.67 mgkg-1 was significantly (p<0.05) higher than that of wet season (137.19 ± 34.59 mgkg-1). The levels of Total Nitrogen (TN) in the study area were quite low, with values that ranged from 0.19 - 0.50 %, 0.20 - 0.44 % and 0.15 - 0.046 % in Station 1, 2 and 3 respectively with no significant differences observedirrespective of seasons. Levels of Ammonium ions (NH4+) recorded in the sediments were 2.28 - 5.11 mgkg-1, 2.96 - 6.01 mgkg-1and 2.41 - 5.72 mgkg-1 in Station 1, 2 and 3 respectively. Nitrate (NO3-) lowest value of 11.60 mgkg-1 was recorded in Station 2 while the highest value of 36.00 mgkg-1 was recorded in Station 3. Wet season NO3- mean value was higher (27.51 ± 4.62 mgkg-1) than that of the dry season (18.38 ± 4.06 mgkg-1). Phosphate levels in sediments were not significantly different among stations and seasons. The mean concentrations of Sulphate in sampling stations were 48.53 ± 4.62 mgkg-1, 36.96 ± 6.93 mgkg-1 and 42.25 ± 5.98 mgkg-1 for Stations 1, 2 and 3 respectively. There was no remarkable spatial variation in the Chloride levels of the sediments. Nevertheless, influence of season was significant (p< 0.05) as dry season mean value of 173.16 ± 12.53 mgkg-1 exceeded that of wet season (131.78 ± 20.76 mgkg-1). Both negative and positive associations  between pollutants and nutritive salt levels in the sediments were recorded across sampling stations irrespective of the season. From the results, it can be concluded that higher level of nutritive salts were in the sediments at seasons where hydrocarbon contamination of the sediment was lowest.","PeriodicalId":353187,"journal":{"name":"World Journal of Applied Science &amp; Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139223462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}