Abstract: Provided are a system and method for supporting a return home mode of a drone used on a ship. A drone control device receives GPS reception signal strength information at a first GPS receiver, drone takeoff feasibility information is displayed on a display unit of the drone control device if the GPS reception signal strength is greater than or equal to a set strength, a drone drive motor is controlled by generating a drone drive motor control signal based on ship position information received from the drone control device and drone position information received from a second GPS receiver when a control unit installed in the drone receives return home information from the drone control device after the drone takes off, and the control unit stops the drone drive motor when the difference between the drone position and the ship position is less than or equal to a set distance.

Abstract: The present invention includes a plurality of legs arranged in a spaced-apart manner; and a connecting bar connected to each pair of legs; further including a cover member arranged to partially wrap around an outer surface of at least one of the legs, wherein when towing is performed at sea, a flow of seawater is guided to an outer side of the leg through contact with the cover member, suppressing the flow of seawater between each pair of legs and thereby reducing resistance caused by the seawater.

Abstract: One embodiment of the present invention provides an ecotoxicity monitoring device using Aliivibrio fischeri, and an ecotoxicity monitoring method using the same. The ecotoxicity monitoring device includes a reaction tank module, an Aliivibrio fischeri culture unit, a diluted water supply unit, a sample supply unit, an optical measurement unit, a control unit and an analysis unit, wherein the analysis unit is configured to calculate a correction coefficient based on the initial light quantity value of a reference reaction tank measured through the optical measurement unit and the final light quantity value measured after a predetermined time has elapsed, and calculate the corrected light quantity values of a sample reaction tank and a dilution reaction tank based on the calculated correction coefficient.

Abstract: Disclosed is an apparatus and method for estimating tidal fronts. The method for estimating tidal fronts includes obtaining past observation data of a sea area to be estimated, substituting and calculating the obtained past observation data into a preset whole water depth mixing discriminant for a plurality of points in the sea area to be estimated, and as a result of the calculation, regarding an area of points where a calculated value is less than or equal to a preset reference value as a whole water depth mixing sea area, regarding an area of points where the calculated value exceeds the preset reference value as a stratified sea area, and estimating a boundary between the regarded whole water depth mixing sea area and stratified sea area as a tidal front.

Abstract: A method for determining water temperature at a random water depth using a seawater temperature vertical distribution stratum simulation model includes generating a four-layer model for seawater temperature vertical distribution, setting a maximum water depth for each layer in the generated four-layer model, generating water temperature data at equal water depth intervals by processing ocean observation data, calculating a vertical gradient of water temperatures for water depths of each layer in the four-layer model by using the generated water temperature data at equal water depth intervals, calculating a water temperature at the maximum water depth of each layer by using the set maximum water depth of each layer and the calculated vertical gradient, and calculating a model water temperature at a random water depth by using the set maximum water depth of each layer, the calculated vertical gradient, and the water temperature at the maximum water depth of each layer.

Abstract: An automatically-separable suction anchor system including a plurality of pumps is disclosed. The system includes an opening/closing unit including a blocking plate provided at a suction pile while having a through hole and pull-up brackets, and a valve member to cause the interior of the suction pile to selectively communicate with an exterior of the suction pile, a suction device including an operation-supporting tubular body with a suction hole and a pressing opening/closing part configured to enable the suction hole to communicate with the suction pile, a frame including clamps to be selectively coupled to the pull-up brackets, and first and second supports, and an operating pump coupled to the operation-supporting tubular body, the operating pump including a first pump of high capacity and a second pump of high head configured to penetrate the suction pile, and a third pump configured to draw the suction pile, and a control module.

Abstract: Proposed is an arrangement of local structures for TLP-type floating offshore wind turbine platform stress distribution and strength enhancement, the arrangement being characterized in that a plurality of supporting members of which at least one is elongated in a different direction protrudes from the bottom plate of a node, so the top plate of the node to which load is applied by a wind turbine is supported by the supporting members, stress is distributed, and damage to the top plate is prevented such that the wind turbine can be stably supported through the node.

Abstract: This application relates to an apparatus for tracking location using a control platform of a small buoy for simulating marine pollutants, in which at least one small observation buoy floats on the ocean, and a relay buoy collects location information from the observation buoy and provides the collected location information to a weather information management server. The apparatus may include at least one observation buoy and a relay buoy, the observation buoy including a GPS receiver which receives a signal transmitted from a GPS satellite and generate location information. The apparatus may also include a communicator performing wireless transmission and reception of signals with the relay buoy, and a power source providing driving power to the GPS receiver and the communicator. The relay buoy may receive location information from the at least one observation buoy and provide the received location information to a weather information management server.

Abstract: The present disclosure relates to a reverse-time migration method for marine vertical cable seismic (VCS) survey data and provides a reverse-time migration apparatus and method for vertical cable seismic (VCS) survey data using directional propagation of receiver wavefields, configured to perform equation-of-motion-based transform and inverse-transform processing on observed pressure wavefields during back-propagation of receiver wavefields to solve the problem of reflection boundary screening due to long-wavelength artifacts and avoid up/down wavefield separation to thereby simplify a migration process and improve overall quality of migration images.

Abstract: An X-ray backscatter imaging system for precise searching for container hazardous cargo, includes: an X-ray generator configured to irradiate X-rays toward a search target container; and a cylinder-type scattering X-ray detection collimator configured to allow only scattering X-rays generated on a specific layer of the search target container among the X-rays irradiated from the X-ray generator to pass through, and X-rays scattering on a specific layer is measured by adjusting angles of collimators based on a layer to be measured, so that a search for hazardous cargo by layer of the container can be performed precisely.

Abstract: A surface wave generator is proposed. The generator may include a radiator configured to generate an electromagnetic field based on a signal externally applied. The generator may also include a first dielectric substrate on a top of the radiator and a second dielectric substrate on a bottom of the radiator. The generator may further include a first surface wave generation member on a bottom of the second dielectric substrate, a first geometric pattern being deposited on a top of the first surface wave generation member. The generator may further include a third dielectric substrate on a bottom of the first surface wave generation member. The generator may also include a second surface wave generation member between the third dielectric substrate and a metal surface, a second geometric pattern different from the first geometric pattern and being deposited on an upper surface of the second surface wave generation member.

Abstract: Proposed is a system and method for simulations of marine pollution dispersion using a numerical tracer technique, wherein modeling is faster than conventional diffusion modeling methods by reducing computational volume and load and thereby a simulation of marine pollution dispersion with respect to the long-term continuous discharge may be performed through the numerical tracer technique by configuring to simulate the marine dispersion of suspended sediments (SS) and COD using the Quick Dispersion (Q-DISP) model, which is a diffusion model using the Monte Carlo method, in order to solve the problems of conventional marine pollution dispersion modeling systems and methods using numerical tracer techniques which have the disadvantage of requiring a high-performance computer and a large amount of memory due to the increased computation.

Abstract: Provided are a marine testbed and a marine test method for providing marine verification and securing a track record of an eco-friendly propulsion system for a ship, wherein the marine testbed and the marine test method test and evaluate applicability of a hybrid propulsion system to the ship and facilitate securing of a track record, the hybrid propulsion system utilizing a battery, a fuel cell, a zero-carbon fuel engine, a zero-carbon fuel mixed-combustion engine, and a heterogeneous eco-friendly alternative fuel for the ship which are essential for developing an eco-friendly ship.

Abstract: Provided are an apparatus and a method for measuring water depth. In order to solve a problem of water depth measurement apparatuses and methods in the related art, provided are a system and a method for measuring water depth using radar image processing, wherein an underwater environment, such as the shape of a seafloor surface, is more accurately recognized through analysis of a SAR image using synthetic-aperture radar (SAR), and thus, more efficient and accurate water depth measurement is achieved for a wide region with a relatively simple configuration and low cost.

Abstract: Disclosed is a data collection apparatus for sea creatures including a main body, an antenna, a battery case and a separation unit. The main body includes a sensor assembly configured to collect information about surroundings of a target creature to be recorded, and a battery coupler formed at one side of the main body. The antenna protrudes in one direction from the main body so as to send data to outside. The battery case has a male connector configured such that at least a part thereof is accommodated in the battery coupler so as to be rotatably coupled thereto, and a battery installed in the battery case so as to supply electrical energy to the main body. The separation unit is detachably coupled to the battery case, and is fixed to the target creature to be recorded.

Abstract: Provided is a polypeptide having FGF2 activity and improved temperature stability and protease resistance. The polypeptide includes at least one substitution selected from a substitution of aspartic acid (D) with glutamic acid (E) at position 28, a substitution of cysteine (C) with isoleucine (I) or leucine (L) at position 78, or a substitution of cysteine (C) with isoleucine (I) or tryptophan (W) at position 96 in SEQ ID NO: 1.

Abstract: A system for remedying deep-sea mine tailings includes a reaction basin in which the solid-liquid ratio of deep-sea mine tailings is adjusted and into which aluminum sulfate is injected as an additive for extraction of heavy metals from the deep-sea mine tailings.

Abstract: This application relates to an adsorption desalination system using a multi-effect evaporator apparatus. In one aspect, the system includes a multi-effect evaporator apparatus producing high-pressure vapor and low-pressure vapor, a plurality of reaction units including an adsorbent adsorbing or desorbing moisture from the high-pressure vapor and low-pressure vapor and a heat exchange tube transferring heat to the adsorbent. The system may also include a condenser condensing vapor containing moisture desorbed from the adsorbents, and cold-hot water lines selectively supplying chilled water and hot water to the heat exchange tubes. The system may further include vapor lines connecting the multi-effect evaporator apparatus and the reaction units, and the reaction units and the condenser, respectively, valves disposed in the vapor lines, and a valve controller controlling operation of the valves to selectively supply chilled water or hot water supplied to the heat exchange tubes from the cold-hot water lines.

Abstract: Proposed is a ship cogeneration system using waste heat of an LNG engine ship recovered through an economizer. More particularly, proposed is a ship cogeneration system using waste heat of an LNG engine ship recovered through an economizer. The ship cogeneration system is configured to generate electric power by recovering waste heat generated from an LNG engine and providing high-temperature and high-pressure steam discharged from the economizer to an evaporator of an organic Rankine cycle. The ship cogeneration system is capable of removing soot generated on a contact surface between the exhaust gas of the LNG engine and the economizer by using some of the high-temperature and high-pressure steam.

Abstract: Disclosed is an automatic switching communication method including: obtaining LTE communication state information of a main communication module for communicating with outside through a directional antenna and a sub-communication module for communicating with the outside through a directional antenna; registering the LTE communication state information of the main communication module and the sub-communication module in a routing table; determining whether the main communication module and the sub-communication module are capable of performing LTE communication; and comparing with pre-specified communication quality coefficients of the main communication module and the sub-communication module to adjust a routing path.