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Liquid crystals (LCs) were discovered more than a century ago, and were, for a long time, treated as a physical curiosity, until the development of flat panel screens and display devices caused a revolution in the information display industry, and in fact in society. There would be no mobile phones without liquid crystals, no flat screen TVs or computer monitors, no virtual reality, just to name a few of the applications that have changed our whole world of vision and perception. All of these inventions are based on liquid crystals that are formed through a change in temperature, thermotropic LCs. However, there is another form of liquid crystals, described even earlier, yet much less talked about; the lyotropic liquid crystals that occur through the change of concentration of some molecules in a solvent. These are found in abundance in nature, making up the cell membranes, and are used extensively in the food, detergents and cosmetics industries. In this collection of articles by experts in their respective research areas, we bring together some of the most recent and innovative aspects of lyotropic liquid crystals, which we believe will drive future research and set novel trends in this field.

Lyotropic liquid crystals --- uniaxial nematic phase --- biaxial nematic phase --- stabilization of nematic phases --- micelle --- surfactants --- chromonics --- structure --- physico-chemical properties --- rods --- curved surface --- Potts --- liquid crystal --- graphene oxide --- lyotropic --- colloid --- nematic --- lyotropic liquid crystals --- SmC* phase --- chirality --- ferroelectricity --- hydrogen bonds --- hydration forces --- cellulose nanocrystals --- hydroxypropyl cellulose --- chiral nematic --- cholesteric liquid crystals --- colloidal suspensions --- kinetic arrest --- gelation --- glass formation --- coffee-ring effect --- bragg reflection --- chromonic --- amphiphilic --- colloidal --- application --- biaxial nematic transition --- field behavior --- diluted nematic systems --- lyotropic liquid crystal --- nanomaterial --- mesogen --- phase behavior

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Ocean Structures subjected to actions of ocean waves require safety inspection as they protect human environment and everyday lives. Increasing uses of ocean environment have brought active research activities continuously. The newly developed technology of ocean energy even pushed the related needs forward one more step. This Special Issue focuses on Analysis of Interactions between wave structures and ocean waves. Although ocean structures may cover various practical and/or conceptual types, we hope in the years to come, the state-of-the-art applications in wave and structure interactions and/or progress review and future developments could be included. There are fifteen papers published in the Special issue. A brief description includes: Lee et al. [1] presented a concept of a water column type wave power converter. Li et al. [2] considered submerged breakwaters. Lin et al. [3] studied an ocean current turbine system. Thiagarajan and Moreno [4] investigated oscillating heave plates in wind turbines. Chiang et al. [5] proposed an actuator disk model. Tseng et al. [6] investigated Bragg reflections of periodic surface-piercing submerged breakwaters. Lee et al. [7] analyzed caisson structures with a wave power conversion system installed. Yeh et al. [8] reported motion reduction in offshore wind turbines. Wu and Hsiao [9] considered submerged slotted barriers. Tang et al. [10] studied floating platforms with fishnets. Chen et al. [11] calculated mooring drags of underwater floating structures with moorings. Jeong et al. [12] estimated the motion performance of light buoys using ecofriendly and lightweight materials. Zhang et al. [13] considered vibrations of deep-sea risers. On the other hand, Shugan et al. [14] studied the effects of plastic coating on sea surfaces.

deep-sea riser --- top tension --- vortex-induced vibration --- numerical simulation --- experiment --- light buoy --- motion performance in waves --- potential-based simulations --- viscous damping coefficients --- free decay tests --- computational fluid dynamics --- analytic solution --- water waves --- underwater floating structure --- mooring forces --- interaction --- floating platform --- fishnet mesh size --- frequency-domain --- time-domain --- nonlinear waves --- BEM --- solitary wave --- submerged breakwater --- slotted barrier --- PIV --- RANS model --- motion reduction control --- renewable energy --- TLD --- offshore wind turbine --- structural safety --- breakwater design --- wave energy --- wave power converting system --- caisson breakwater application --- eigenfunction matching method --- oblique wave --- Bragg reflection --- step approximation --- surface-piercing structure --- periodic bottom --- surface waves --- wave breaker --- elastic plate --- power prediction --- capacity factor --- actuator disk --- wind farm --- heave plate --- free surface effect --- floating offshore wind turbine --- hydrodynamic coefficients --- added mass --- damping coefficient --- forced oscillation in waves --- Keulegan Carpenter number --- stability --- ocean current power system --- surface type --- buoyance platform --- mooring foundation --- particle image velocimetry --- submerged obstacle --- undulating breakwater --- rectangular breakwater --- vortex energy --- offshore wind power --- template structure system --- oscillating water column --- n/a --- typhoon --- gust --- extreme wind --- aerodynamic load