75 results for “impact damage”

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Research ArticleOpen accessPhrase in the titleIntegrity Classification Algorithm of Images obtained from Impact Damaged Composite StructuresMahmoud Z. IskandaraniProblem statement: Many NDT systems used for damage detection in composites are difficult to apply to complex geometric structures, also, they are time-consuming. As a solution to the problems associated with NDT applications, an intelligent analysis system that supports a portable testing environment, which allowed various types of inputs and provided sufficient data regarding level of damage in a tested … …Journal of Computer Science, Vol. 6, Issue 4 · 30 Apr 2010 · 6,970 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleAbnormalities in Ultrasonic (C-Scan) Images of Composite Structures: Impact Damaged Versus Hole DamagedMahmoud Zaki IskandaraniThis paper is about applying image processing to detect different types and levels of damage in composite structures using in C-scan images produced by ultrasonic testing. This method plays an important role as it can detect any discontinuities or flaws in the specimen. To analyze such critical image in an, automated inspection environment an image processing method that correlates Threshold … …Journal of Computer Science, Vol. 15, Issue 7 · 23 Jul 2019 · 8,230 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleProgressive Damage Modelling of Transverse Impact Behavior of Adhesively Bonded Composite JointsDimitrios Athinaios, Konstantinos Tserpes, Giannis FlorosA three-dimensional dynamic numerical model was developed, using the commercially available finite element software LS-DYNA to simulate the Low Velocity Impact (LVI) case on bonded joints consisting of woven CFRP adherents. The adhesive failure simulated using the Cohesive Zone Method (CZM), while the failures in the composite material simulated using a progressive damage material model based on Hashin’s failure criteria. … …International Journal of Structural Glass and Advanced Materials Research, Vol. 4, Issue 1 · 3 Apr 2020 · 6,424 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleNuclear Factor Erythroid-2-Related Factor 2 (Nrf2) Signalling Pathway and Apoptosis Impact on the Effect of Tetramethylpyrazine against H2O2-Damage in Human Hepatic Cell Line (LO2 Cells)Songbo Guo, Xinglin Han, Baoguo Sun et al.As an active component in traditional Chineseherbal medicine, Tetramethylpyrazine (TMP)played a critical role in the treatment of cardiovascular, cerebrovascular, andeye diseases. In this study, the TMP has obtained from the Chinese herbalmedicine Ligusticum chuanxiong and investigated the protective effects of TMPon oxidative damage in human LO2 cells with the treatment ofdifferent concentrations of TMP. The results showed that TMP reserved … …American Journal of Biochemistry and Biotechnology, Vol. 18, Issue 3 · 6 Sep 2022 · 5,654 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleThe Impact of Road Opening on Vegetation Damage in the Bukit Barisan Forest Park Protected Forest in IndonesiaBudi Utomo, Bungaran Johanes Tambunan, Rizky Wahyudi et al.Road opening on the Medan-Berastagi alternative route will begin in 2023 with a track length of approximately 55.87 km. The aim of this study was to analyze land cover in forest areas and recommend plants around the opening of the Medan-Berastagi alternative route, Kutalimbaru District. Data processing and retrieval was carried out in November 2023-January 2024. Calculation of the 2018 … …OnLine Journal of Biological Sciences, Vol. 25, Issue 1 · 10 Feb 2025 · 4,013 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleImpact of Coriander Seeds Extract Against Thyroidectomy Induced Testicular Damage and DNA Replication in Male RatsAzhar Azher Alankooshi, Ahmed F. Hasan et al.An important target organ for thyroid hormone activity is the testis and hypo or hyperthyroidism causes noticeable alterations in testicular function. This study aimed to investigate the therapeutic effect of Coriander Seeds Extract (CSE) against thyroidectomy induced toxicity, oxidative stress, injury, and proliferation in male testes rats. 40 male rats were equally divided into 4 groups [Gp1, control; Gp2, CSE; … …OnLine Journal of Biological Sciences, Vol. 23, Issue 2 · 3 Apr 2023 · 6,611 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsCorrelating and Modeling of Extracted Features from PVT Images of Composites using Optical Flow Technique and Weight Elimination Algorithm Optimization [OFT-WEA]Mahmoud Zaki IskandaraniA new approach to the use and implementation of Optical Flow technique is presented. The technique extracts features from presented images as a function of reference image and produces percentage of matching between the reference and tested images. The new approach in using Optical Flow lies in replacing the motion part of the algorithm with differential time related changes in … …Journal of Computer Science, Vol. 13, Issue 9 · 29 Sep 2017 · 7,320 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsModified Center Interpolation Net for Classification of Composite Structures Tested Using Low Frequency Electronic TappingMahmoud Z. IskandaraniProblem statement: Most exhaustive NDT techniques require large capital equipment, are difficult to apply to complex geometric structures and, above all, are time-consuming to use and some take a considerable time to complete. As a solution to the problems associated with NDT applications, there is a need to establish an intelligent analysis system that supports a portable testing environment, which … …American Journal of Applied Sciences, Vol. 7, Issue 2 · 28 Feb 2010 · 7,108 accessesView PDF Cite

Research ArticleOpen accessIn the abstractOff-road Vehicle-Induced Substrate Vibrations Are Associated with Strong Declines in Ectomycorrhizal Mushroom Fruiting in Forest EcosystemsLev ShestakovWe conducted a multi-year (2020-2024) control-impact field study in a pine forest of the Moscow Region to assess whether off-road vehicle activity affects the fruiting of two ecologically important ectomycorrhizal fungi, Boletus edulis and Suillus luteus. Substrate vibrations associated with vehicle passage were recorded and characterized by dominant energy in the low-frequency range. Over the study period, abundance in disturbed … …OnLine Journal of Biological Sciences, Vol. 26, Issue 2 · 23 May 2026 · 1,305 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Impact of Climate Factors on the Epidemiology and Management of Potato virus YMahabuba Mostafa, Md. Motaher HossainPlant viruses give rise to potential loss to global crop production and have the potential to cause widespread damage. Potato virus Y (PVY) is a plant virus that belongs to the genus Potyvirus and the family Potyviridae and it is considered a major concern, particularly for solanaceous crops such as potatoes. PVY represents the largest cluster of plant viruses, encompassing … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 31 Aug 2024 · 4,758 accessesView PDF Cite