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78 articles for “C.S. Tee”
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Research ArticleOpen accessEvery word in the titleDetermination of Lead in Human Teeth by Hydride Generation Atomic Absorption SpectrometryHassan T. AbdulsahibProblem statement: The determination of lead in human teeth at concentration levels of μg/ml is proposed using Hydride Generation Atomic Absorption Spectrometry (HG-AAS). To do this, 2% (wv) lanthanum chloride solution was employed as matrix modifying reagent to increase sensitivity and remove matrix interferences. Approach: About 100 μL of sample and 100 μL of 3.0% (m/v) NaBH4 are simultaneously injected … …American Journal of Environmental Sciences, Vol. 7, Issue 5 · 31 Oct 2011 · 7,136 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAge and Sequence of Permanent Canine and Premolar Teeth Eruption in 102-174 Months Old Children in Kerman ProvinceFarokhgissor Elham, Shahrzad AdhamyProblem statement: The aim of this study was to investigate the eruption time of permanent canine and premolar teeth in 8.5-14.5 years (102-174 months) old boys and girls of Kerman province. Approach: The sample for this cross-sectional study consisted of 2602, 102-174 months old (8.5-14.5 years old) children form 56 primary and guidance schools in Kerman which were scattered over … …Current Research in Dentistry, Vol. 1, Issue 1 · 30 Jun 2010 · 14,330 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePredicting Smartphone Addiction in Teenagers: An Integrative Model Incorporating Machine Learning and Big Five Personality TraitsJacobo Osorio, Marko Figueroa, Lenis WongSmartphone addiction has emerged as a growing concern in society, particularly among teenagers, due to its potential negative impact on physical, emotional social well-being. The excessive use of smartphones has consistently shown associations with negative outcomes, highlighting a strong dependence on these devices, which often leads to detrimental effects on mental health, including heightened levels of anxiety, distress, stress depression. … …Journal of Computer Science, Vol. 20, Issue 2 · 29 Dec 2023 · 8,238 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleStructural and Dielectrical Properties of Sterilized Human TeethMostafa Fawzy Eissa, Hassan Mohamed El-Shamy, Hassan Saad HanafyProblem statement: This study investigated the changes in crystallinity and dielectrical properties (conductivity) that could be demonstrated in extracted human teeth (enamel and dentin) subjected to γ-radiation at the sterilization dose (25 kGy). Approach: Twenty human third molar teeth were used in the study. Teeth were prepared so forty enamel and dentin samples were obtained. The samples were divided into … …Physics International, Vol. 3, Issue 1 · 20 Dec 2012 · 7,187 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleComparison Between Niemann’s and Finite Element Method for the Estimation of Maximum Allowable Stress of Meshing Spur Gear Teeth at Highest Point of Single Tooth ContactKonstandinos G. Raptis, Theodore N. Costopoulos, Andonios D. TsolakisPurpose of this study is the consideration of loading and contact problems encountered at rotating machine elements and especially at toothed gears. The later are some of the most commonly used mechanical components for rotary motion and power transmission. This fact proves the necessity for improved reliability and enhanced service life, which require precise and clear knowledge of the stress … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 2 · 27 Aug 2012 · 7,764 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleShear Bond Strength of Four Cariostatic Tooth Colored Materials to Dentin of Permanent Premolar TeethE. Farrokhgisu, A. EskandarizadeProblem statement: The purpose of this study was to compare the shear bond strength of four cariostatic restorative materials to dentin of permanent teeth. Approach: Restorative materials which have used in the study were composite P60 (3M), conventional glass ionomer (Fuji II, GC), light cured glass ionomer (Vitremer, 3M), compomer (F2000, 3M) and flow compoglass (Vivadent). This study was in … …Current Research in Dentistry, Vol. 1, Issue 2 · 16 Jul 2011 · 8,093 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIncreasing the Strength of Standard Involute Gear Teeth with Novel Circular Root Fillet DesignV. Spitas, Th. Costopoulos, C. SpitasIn this study the idea of spur gear teeth with circular instead of the standard trochoidal root fillet is introduced and investigated numerically using BEM. The strength of these new teeth is studied in comparison with the standard design by discretizing the tooth boundary using isoparametric Boundary Elements. In order to facilitate the analysis the teeth are treated as non-dimensional … …American Journal of Applied Sciences, Vol. 2, Issue 6 · 30 Jun 2005 · 7,592 accessesView PDFCite
Review ArticleOpen accessIn the keywordsSocial Media Usage and its Implications on Mental Health a ReviewPuneet Kaur, Deepika Chaudhary, Jaiteg SinghWith more homes, businesses, and people having access to the Internet recently, the usage of social media and social networking websites has expanded significantly. Multiple social media platforms are available and more people from the public, companies, non-profits, and other groups are utilizing them. Therefore, online engagement is now a common aspect of daily life for a population of billions … …Journal of Computer Science, Vol. 21, Issue 2 · 21 Jan 2025 · 8,116 accessesView PDFCite
Research ArticleOpen accessIn the keywordsComparison of Maximum Gear-Tooth Operating Bending Stresses Derived from Niemann's Analytical Procedure and the Finite Element MethodAndonios D. Tsolakis, Konstandinos G. RaptisProblem statement: Main purpose of this study was to investigation toothed gear loading problems using the Finite Element Method. Approach: We used Niemann’s equations to compare maximum bending stress which was developed at critical gear-tooth flank point during gear meshing, applied for three distinct spur-gear sizes, each having different teeth number, module and power rating. Results: The results emerging after … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 3 · 18 Aug 2011 · 7,700 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEvaluation of Theoretical and Practical Education of Mineral Trioxide Aggregate Manipulation for Dental StudentsE. Farokh Gisour, M. Hashemi PourProblem statement: The aim was to find out whether undergraduate students in Iranian dental schools were taught about and used clinically Mineral Trioxide Aggregate (MTA). Approach: Iranian senior dentistry students (487) were evaluated in this cross-sectional study. A questioner was prepared which contained personal questions in addition to theoretical and practical information about the use of MTA in senior dentistry … …Current Research in Dentistry, Vol. 1, Issue 2 · 16 Jul 2011 · 7,471 accessesView PDFCite