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73 articles for “structural change”
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Research ArticleOpen accessIn the abstractIntervention Model for Analyzing the Impact of Terrorism to Tourism IndustryZ. Ismail, Suhartono, A. Yahaya, R. EfendiProblem statement: It is common in time series data with extreme change in its mean caused by an intervention which comes from external and/or internal factors. This extreme change in mean is known as regime change or structural change. Problems of external factor intervention such as the effect of the Arab oil embargo to consumption level of electricity in United … …Journal of Mathematics and Statistics, Vol. 5, Issue 4 · 31 Dec 2009 · 7,949 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Torsion on Externally Prestressed Segmental Concrete Bridge with Shear KeyM. A. Algorafi, A. A.A. Ali, M. S. Jaafar et al.Externally Prestressed Segmental (EPS) concrete box sections are widely used in the construction of bridge structures today. EPS concept has become an attractive tool for rehabilitation and strengthening of existing bridges which have insufficient strength and/or excessive deflection and cracking. Problem statement: EPS bridges are affected by combined stresses (bending, shear, normal, and torsional) at the joint interface between the … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 8,433 accessesView PDFCite
Research ArticleOpen accessIn the abstractWater Hammer Analysis by Characteristic MethodA.R. Lohrasbi, R. AttarnejadRapid changes in the velocity of fluid in closed conduits generate large pressure, which are transmitted through the system with the speed of sound. When the fluid medium is a liquid the pressure surges and related phenomena are described as water hammer. Water hammer is caused by normal operation of the system, such as valve opening or closure, pump starts … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 4 · 31 Dec 2008 · 8,705 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Sectoral Efficiency Analysis of Malaysian Stock Exchange Under Structural BreakChin Wen CheongWe investigated the weak-form market efficiency of nine daily sectoral indices of Malaysian stock market between 1996 and 2006. The structural break unit root tests evidenced most of the price indices characterized by mean-reverting process that violated the random walk process. These empirical results were in sharp contrast with the traditional unit-root test which ignored the economic crisis and currency … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 7,292 accessesView PDFCite
Research ArticleOpen accessIn the abstractRandom Walk Models Classifications: An Empirical Study for Malaysian Stock IndicesChin Wen CheongThis article studied the Random Walk models introduced by Campbell et al.[2] for Malaysian stock market. The analysis is implemented under the possible drastic economics structural change using an iterative structural change test. After the break-date identification, the random walk hypothesis is tested by multiple variance ratios test in two separate periods. We further examined the serial correlations of return’s … …American Journal of Applied Sciences, Vol. 5, Issue 4 · 30 Apr 2008 · 6,854 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntroduction of Three Complementary Technologies into Clinical Medicine: Development of New Diagnostic and Prognostic ParametersGernot P. Tilz, Marco Wiltgen, Ulrike Demel et al.Molecular medicine leads us to understand some diseases at the molecular level. Examples are the analysis of immune complexes and receptor - anti receptor compounds used in clinical medicine. Structural changes of some serum proteins occur in inflammation, neoplasie and autoimmunity. The detection and analysis of such structural modifications may offer a new field for the diagnosis, prognosis and therapy … …American Journal of Immunology, Vol. 2, Issue 1 · 31 Mar 2006 · 6,961 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Water Bath Heating on Tannin Content and Quality Improvement Potential of Gambier (Uncaria gambir Roxb.)Daimon Syukri, Bastian Nova, Rina Yenrina et al.Gambir (Uncaria gambir Roxb.) is a source of natural phenolic compounds rich in catechins and tannins and has potential as a sustainable industrial raw material. During heating, phenolic compounds may undergo structural changes, including possible oxidation and polymerization, which can affect gambier quality beyond its catechin content. This study evaluated the effect of indirect heating duration using a water bath … …OnLine Journal of Biological Sciences, Vol. 26, Issue 4 · 23 Sep 2026 · 715 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Acute Oral Toxicity Induced by Tablets Based on Ethanolic Extract of Salvia dumetorum Leaves in Experimental RatsYana Levaya, Karakoz Badekova, Mussa Zholdasbayev, Gayane AtazhanovaThe aim of this study was to assess the acute oral toxicity of a solid dosage form based on Salvia dumetorum Andrz. ex Besser leaf extract (SDT5) in experimental rats. Acute toxicity was evaluated over a 14-day observation period following a single oral administration at three dose levels (500 mg/kg, 1000 mg/kg, and 2000 mg/kg), prepared in 0.5 mL of … …OnLine Journal of Biological Sciences, Vol. 26, Issue 2 · 23 Jun 2026 · 1,245 accessesView PDFCite
Research ArticleOpen accessIn the abstractNitric Oxide Treatment Improves the Antioxidant Capacity While Inhibiting Anthocyanin Biosynthesis of Peach Fruit (‘Xiahui-8’) During RipeningZiqi Wang, Yanyan Li, Yingling Deng et al.Nitric Oxide (NO) is an important bioactive signal molecule that plays an important role in diverse physiological processes. This study aimed to explore the effects of Nitric Oxide (NO) treatments on postharvest peach fruit. Specifically, we examined changes in quality attributes, antioxidant ability, and anthocyanin profiles during storage, given the important role of NO as a bioactive signal molecule in … …American Journal of Biochemistry and Biotechnology, Vol. 22, Issue 1 · 14 Apr 2026 · 1,400 accessesView PDFCite
Research ArticleOpen accessIn the abstractIn Vitro Antimicrobial Activity of Modified Lysozyme (Lys 90) and Herbal Extracts Against Multidrug-Resistant Escherichia coliEni Kusumaningtyas, Bagem BR Sembiring, Andriani et al.The emergence of Antimicrobial Resistant (AMR) poses a significant challenge to the poultry farming industry. This study investigated the potential of Lysozyme (Lys), modified Lysozyme (Lys 90), an herbal extract, and their combination (herbs + Lys 90) as alternative antimicrobial agents against Multidrug-Resistant Escherichia coli (MDR-E. coli). Lys 90 was prepared by heating Lys at 90 °C for 20 minutes. … …OnLine Journal of Biological Sciences, Vol. 25, Issue 3 · 1 Dec 2025 · 2,079 accessesView PDFCite