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32 articles for “Wave motion”
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Self-similarities in Hilbert Envelope Energy Regions on Motion Waveforms Application in Detecting Motion Irregularities in Video Frames
Abstract: This paper introduces self-similar Hilbert envelope energy regions that are commonly found in oscillating spectral curves. The time-varying amplitudes and peak value frequencies in typical spectral curves reflect the response of a system to external stimuli. A Hilbert envelope is a smooth curve connected between spectral curve peak values. Each peak value on an envelope curve at time identifies an envelope-bounded region with interior area (called Hilbert envelope energy region …
Published in Trends in Opto-electro & Optical Communication · Vol. 14, Issue 3, 2024 · pp. 34–49 Read article
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Relativity of Wavelength According to the Relative Velocity between the Observer and the Wave Source
Abstract: An observer on Earth can observe the path of the Moon and Earth around the Earth and the Sun, respectively. Both are elliptical orbits in which the Earth and the Sun are concentrated, respectively. But how do we accept both paths together, where one cannot imagine the Earth as stationary while the Moon revolves around it in one of them and at the same time the Earth itself is the …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 10, Issue 3, 2021 · pp. 8–18 Read article
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Analysis of Wind-wave Effect on Short-term FOWT Power Loss
Abstract: The paper analyses the effects of wind misalignment, wave oscillatory movement and wind-wave misalignment onto the performance of floating offshore wind turbines (FOWT) and how they affect the power generation. The study focuses on short term prediction to match network requirements for electric energy management avoiding overloads or consumers demand mismatching. The research studies individual as well as combined effects to determine the reduction in power generation due to these …
Published in Journal of Offshore Structure and Technology · Vol. 8, Issue 3, 2021 · pp. 36–54 Read article
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Fatigue Assessment of Flare Foundations on FPSO Structure
Abstract: This paper addresses the fatigue analysis results of the new-built FPSO’s flare tower foundations and associated the hull which is supporting the four cylindrical legs of the flare. Flare foundation is checked for fatigue resistance both in “towing” and “on site” conditions. The fatigue design of the flare supporting structure is to take into account the inertia loads due to wave motions in towing and on site, but also the …
Published in Journal of Offshore Structure and Technology · Vol. 2, Issue 2, 2015 · pp. 1–18 Read article
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Gesture-Based Cursor Control: A Comprehensive Review of Techniques and Applications
Abstract: Although hand gesture detection for man-machine interfaces has advanced recently, many systems still have issues with background and lighting. We have developed a rapid motion history image-based system to categorize dynamic hand motions and a face detection method to adaptively detect skin color. For the up, down, left-, and right-hand gesture classifiers, four sets of haar-like directional patterns were trained. To operate different household appliances, six hand gestures were defined, …
Published in International Journal of Electrical and Communication Engineering Technology · Vol. 3, Issue 1, 2025 · pp. 9–13 Read article
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Bladeless Offshore Wind Turbines
Abstract: The goal of this paper is to define the structural characteristics of a vertical single-blade wind turbine operating under oscillatory movement due to the wave motion and vibrational forces provided by the wind to the assembly. This new type of turbine can change the current landscape of wind energy. They can expand the generated self-consumption produced by wind energy, which is currently low, and take advantage of the free space …
Published in Journal of Offshore Structure and Technology · Vol. 10, Issue 2, 2023 · pp. 44–53 Read article
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3D Finite Element Analysis of Marine Risers under Random Loads
Abstract: The dynamic response of marine risers under long crested random sea is obtained in time domain using finite element solver ABAQUS/AQUA. The response analysis is based on a simulation technique which duly considers various nonlinear effects such as relative velocity squared drag force, variable added mass due to variable submergence and nonlinearity due to large excursions. It also accounts for variable tension in the riser due to variable submergence, variable …
Published in Journal of Offshore Structure and Technology · Vol. 1, Issue 1, 2014 · pp. 46–52 Read article
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A research note on a study of motion characteristics of tension leg spar
Abstract: The present research note, reports a study on the dynamic motion analysis of a tension leg spar (TLS). In the research note the time domain analysis is done using USFOS*TM software for a tension leg spar supporting a ‘National Renewable Research Laboratory (NREL)’ 5MW wind turbine at an operating depth of 320m to determine the dynamic responses of tension leg spar subjected to sea state 11 (=15m and =16sec). Motion …
Published in Journal of Offshore Structure and Technology · Vol. 4, Issue 3, 2017 · pp. 1–20 Read article
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Fatigue Assessment of Longitudinal Stiffener End Connections for Ageing Tankers
Abstract: Abstract The world tanker fleet is ageing. In this situation it is essential to ensure that the transportation of oil and gas is carried out by quality vessels. This is possible with old tankers as long as their condition can be properly assessed. Since the 80’s relatively few new-buildings have been ordered and this has opened for operation of tankers up to 30 years of age. Ship and offshore structures …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 1, 2016 · pp. 1–12 Read article
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Dynamic Analysis of Irregular Building with Box Type Shear Wall at Center under Different Type of Soil
Abstract: Building engineers are being shown to accept High rise construction due to increase shortage and land cost. The development of high-rise buildings presents many challenges with the type of lateral load. In High rise buildings getting better efficiency and the high-strength shear wall is an effective solution. The Optimum location of the shear wall depends upon the structural shape of buildings. For irregular structures, inner shear walls provide more strength …
Published in Journal of Construction Engineering, Technology & Management · pp. 37–49 Read article
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Dynamic Analysis of Irregular Building with Box Type Shear Wall at Center under Different Type of Soil
Abstract: Building engineers are being shown to accept high-rise construction due to increase shortage and land cost. The development of high-rise buildings presents many challenges with the type of lateral load. In high-rise buildings getting better efficiency and the high-strength shear wall is an effective solution. The Optimum location of the shear wall depends upon the structural shape of buildings. For irregular structures, inner shear walls provide more strength and durability …
Published in Journal of Construction Engineering, Technology & Management · Vol. 11, Issue 2, 2021 · pp. 37–49 Read article
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Variation of Ground Acceleration with Increase in Lateral Distance
Abstract: Ground acceleration induced by dynamic loading decreases with increasing lateral distance from the source because of wave attenuation and energy dissipation through the ground. Accurate estimation of ground acceleration at different distances is essential for evaluating the safety and performance of nearby structures, particularly in blasting, seismic, and heavy construction activities. This study presents a simplified linear attenuation model for estimating ground acceleration at greater lateral distances using limited measured …
Published in Journal of Geotechnical Engineering · Vol. 13, Issue 2, 2026 · pp. 21–27 Read article
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Effect of Moonpool on Drillship Motions
Abstract: A moonpool is meant for access to the underwater part from the onboard ship. It is a vertical opening along with the depth having an effect on the performance of the floating platform. The water motion inside the moonpool of a drillship is mainly in horizontal sloshing mode and vertical piston mode. This water motion in horizontal or in vertical mode mainly depends on the cross-section of the moonpool, encountering …
Published in Journal of Offshore Structure and Technology · Vol. 7, Issue 1, 2020 · pp. 1–5 Read article
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Kinetic study of a bipedal humanoid robot and mode of the spherical inverted pendulum
Abstract: Studies on an anthropomorphic biped walking robot have led to the expectation that a bipedal humanoid robot will actively participate in human living environments. The authors created the human-size 35 active DOF bipedal humanoid robot "WABIAN" and the human-size 41 active DOF bipedal humanoid robot "WABIAN-R" as the initial step in creating a bipedal humanoid robot. The authors also put forth a fundamental method of controlling whole-body cooperative dynamic biped …
Published in Trends in Machine design · Vol. 9, Issue 3, 2022 · pp. 29–34 Read article
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Performance Optimization of Floating Offshore Wind Turbines with Wave Oscillation
Abstract: In this paper, the influence of wind turbine tilt due to wave effects on the power generation has been studied and analyzed to optimize the performance of floating offshore wind turbines (FOWT). A simulation process has been developed to determine the optimum tilt angle at which the wind turbine delivers the maximum power. The simulation has been applied to a marine wind turbine with articulated hinge, which allows to correct …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 3, 2022 · pp. 26–39 Read article
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Structural Responses of Offshore Jacket Platform Subject to Seismic Ground Acceleration and Wave Forces
Abstract: In this paper, the effect of seismic ground acceleration on offshore platforms in the Malaysian waters has been investigated. In the Malaysian region of South China Sea, the conventional practice applied to design of offshore structures is to assume that forces induced on the platforms due to waves, current and wind control the overall response of the structures. Seismic analysis is not conducted since Malaysia is not located in a …
Published in Journal of Offshore Structure and Technology · Vol. 1, Issue 2, 2014 · pp. 15–23 Read article
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Enhancing Ship Roll Stabilization: Design of Active Fin Stabilizers Using Auto-Tuned PID Controllers
Abstract: The rolling motion of any type of mechanical system can be realized by the linear differential equation with some constant coefficient. In the domain of marine industries, it is observed that the stabilization of the ship’s roll motion is required due to the occurrence of the most unwanted water wave disturbances at the sea. It may cause serious types of damage to the equipment related to the ship. Active fin …
Published in Journal of Experimental & Applied Mechanics · Vol. 15, Issue 3, 2024 · pp. 18–31 Read article
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Currents, Waves, and Whirls: An Academic Exploration of Fluid Mechanics
Abstract: Fluid mechanics investigates the behavior of liquids and gases in motion and at rest, revealing the principles that control natural occurrences and engineering systems alike. This article gives an easy review of essential concepts such as fluid characteristics, pressure, flow patterns, and the contrast between laminar and turbulent flow. It explores how fundamental rules, including conservation of mass and energy, impact the transport of fluids across varied settings. Through real-world …
Published in Recent Trends in Fluid Mechanics · Vol. 13, Issue 1, 2026 · pp. 8–13 Read article
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The Anhadnaad Universe
Abstract: Current Science considers that 95% universe is made of Dark energy and Dark Matter which are completely unknown entities and can’t be detected directly. Current Science also does not believe in independent existence of Consciousness on its own. It rather consider it as an outcome of electrical interaction in brain cells which means there are as many consciousnesses as the number of brains in the entire universe. But my theory …
Published in Research & Reviews : Journal of Physics · Vol. 14, Issue 2, 2025 · pp. 19–29 Read article
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Anhadnaad Energy Field (ANEF) Theory of Universe
Abstract: Quantum Mechanics is the most successful scientific theory of microcosm which completely rejects the objective reality and determinism and embraces the indeterminism and probabilistic nature of underlying microcosm. When Max Planck and Albert Einstein explained the phenomena like Ultraviolet Catastrophe in Black Body Radiation and Photoelectric Effect respectively on the basis of Quantum hypothesis, the era of Quantum Mechanics begins. But Einstein, one of the founders of Quantum Mechanics, does …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 9, Issue 3, 2020 · pp. 1–13 Read article