Abstract:
The present invention relates to a Thermococcus onnurineus NA1 mutant having an increased ability to produce hydrogen from formate and a method of producing hydrogen the same. The Thermococcus onnurineus NA1 mutant according to the invention has an increased ability to produce hydrogen in a formate-containing medium compared to wild-type Thermococcus onnurineus NA1 and shows an increase in growth rate compared to the wild-type. The use of the mutant strain according to the invention can produce hydrogen with high efficiency from formate.
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:
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:
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:
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:
A cold pool detection method and system is proposed. The cold pool detection method is characterized by including collecting and generating sea surface temperature data in a target area, partitioning the target area and generating partitioned areas, setting up clusters of each partitioned area, and sorting out cold pool candidate groups and detecting a cold pool. Here, the setting up of the clusters of each partitioned area is characterized by including setting clustering values for setting the clusters of each partitioned area, and setting the number of the clusters of each partitioned area. The cold pool detection method and system is capable of partitioning a target area, clustering partitioned areas to establish clusters, and using a standard deviation to determine a cold pool.
Abstract:
Proposed is an automatic spray apparatus including an airbrush and mask transfer mechanism, the apparatus including an airbrush for spraying liquid through a nozzle by using air supplied thereto, an airbrush transfer unit capable of adjusting a relative distance from the airbrush to a liquid spray target while supporting the airbrush, a mask having a hole formed in a shape in which the liquid is applied on a surface of the liquid spray target, and a mask transfer unit installed between the nozzle of the airbrush and the liquid spray target while supporting the mask, wherein the airbrush transfer unit includes a trigger actuator capable of operating a trigger that controls the spraying of the liquid contained in a part of the airbrush. The automatic spray apparatus can be implemented at a relatively low cost to be used when manufacturing an MEA having a small area.
Abstract:
Proposed is an underwater data center including: a support fixed to the bottom of the sea; and a body disposed on the support and having data processing servers arranged in an internal space thereof and a plurality of protrusions protruding radially outward from an outer peripheral surface thereof and arranged in a longitudinal direction thereof.
Abstract:
The present invention relates to new compounds derived from marine actinomycetes Streptomyces, and the new compound according to the present invention has an inhibitory effect of NO production on BV-2 microglia stimulated with LPS, and thus can be utilized for the prevention and treatment of neuroinflammatory diseases.
Abstract:
An upright tank-based propulsion assistance rotor sail system is proposed. The system may include an upright tank fixed to a hull of a ship, and a rotor sail in a form of a cylindrical shape having a length and diameter greater than or equal to the upright tank, and installed to surround part or all of an outer circumferential surface of the upright tank. The rotor sail may be rotatably installed while surrounding the upright tank concentrically with the upright tank, and may be movable along a height direction of the outer circumferential surface of the upright tank depending on situations to maintain a predetermined height. In addition, a vessel equipped with the upright tank-based propulsion assistance rotor sail system is proposed, The fuel tank may be installed to stand upright on the vessel so that the rotor sail is installed to be movable in the vertical direction.