It is very important to estimate the relative positions of the satellites. Estimation methods of relative distances between satellites are proposed based on stereo visions in this work. Correspondence problems are solved by analyzing the feature points existing in two images. A homography matrix of the system is generated based on the matched feature points. It also distinguished the unconformed feature points by the RANSAC (Random Sample Consensus) algorithm. It is confirmed that the accuracy of the proposed algorithm for position estimations between the targets can be guaranteed with comparatively small numbers of feature points.

In this study, we have prepared the iron oxide nanoparticles under cubic phase to prepare magnetic cubosome nanopaticles(MCNs). Then, superparamagnetic microneedles(SMMNs) containing MCNs were manufactured through PDMS mold by casting technique. And then, the shapes of SMMNs were imaged by scanning electron microscopy(SEM). Also, skin permeability and cell viability were measured to confirm mechanical strength and cytotoxicity, respectively of SMMNs. Also, magnetic hysteresis measurements were performed using a SQUID-VSM magnetometer to investigate the magnetic properties of SMMNs. Magnetic hysteresis of SMMNs showed a superparamagnetic curve. These results suggest that SMMNs could be utilized as an MRI contrast agent.

The study was conducted in Hyundai Motor's 2017 Santa Fe. The model was equipped with a 2200CC diesel engine and a VGT system.it is possible to diminish the aforementioned problems and maximize the benefits of using a turbocharger by controlling the area of exhaust gas passage via a variable vane. The purpose of this study is to elucidate the causes of failures in vehicles that are often not accelerated. The main causes of poor acceleration are as follows. First, the wires are disconnected. Second, contact instability. Third, defective VGT actuator. In this study, data was analyzed using equipment of G company in actual failure situation. Then, the VGT circuit was measured. As a result, we found that the VGT actuator was the cause of the failure.

Recently, the importance of domestic sweet potato (Ipomoea batatas) varieties following the entry into force of the Nagoya Protocol has been highlighted. In this study, dietary fiber content, free sugars, constituent amino acids, inorganic components, vitamin contents and antioxidative activities were compared and analyzed using two domestic sweet potatoes (Hogammi, Danjami) and one foreign species (Beni-Haruka). The antioxidant activity and dietary fiber content of the Korean sweet potatoes were the highest, and vitamin content, amino acid composition and inorganic content were the highest among the three types of sweet potatoes. Sweet potatoes have a low calorie content and are full of sugar, and are in the spotlight as dietary foods. The most important thing when taking sweet potatoes is the sugar content and dietary fiber distribution. These results suggest that the Korean sweet potato species, which are superior to the foreign sweet potato varieties, Beni-Haruka, are considered to be a good variety and are useful for general food and processed food consumption.

Sluice gates are hydraulic structures frequently installed in rivers and dams for control of flow discharge and water level. Accurately estimating the flow rate (or discharge coefficient) discharged through the gate is a very important issue for water resource management. Most existing studies on discharge coefficient include the assumption that the contraction coefficient downstream flow of the gate remains constant and ignores energy loss. In this study, a discharge coefficient of free flow past a sluice gate was proposed that considered the vena-contracta and energy loss. First, when energy loss was ignored, the best discharge coefficient estimation result was obtained using the constant contraction coefficient value of 0.611. Also, when energy loss was considered, the best discharge coefficient estimation result was obtained when a variable contraction coefficient was used rather than a constant value. For use in estimating the discharge coefficient, the contraction coefficient and energy loss coefficient were presented as regression equations.

In this study, chemical and enzymatic hydrolysis of rice bran protein were conducted to produce polyphenolic compounds and functional peptides with anti-oxidant effects. In order to produce functional peptides, rice bran protein was hydrolyzed using chemicals, commercial enzymes as well as Bacillus natto protease. The results showed that major peptides were hydrolyzed into smaller than 10 kDa when using chemicals, commercial enzymes, and B. natto protease. The protein hydrolysis potential of B. natto protease was equal or higher than that of commercial enzymes. Total phenolic compound concentrations of 9.91 in 1 M NaOH, 9,02 in 2% (v/v) Alcalase and 14.5% in B. natto were measured. Radical scavenging activities of 67.9% in 1 M NaOH, 36.1% in Alcalase and 50.0% in B. natto protease were achieved. The results concluded that B. natto protease isolated chenonggkjang comparable to that of commercial enzymes in the production of functional peptides with anti-oxidant effect and can be used for the value added materials for food and cosmetics industries.

In this study, the optimum operating condition of the molding machine included in the mobile solid fuel production system which produces the solid fuel from the collected coastal waste was analyzed by the response surface analysis method. Most of the coastal wastes are flammable and consist mainly of nets, ropes, buoys, styrofoam and wood. However, it is treated as landfill, consignment treatment or illegal incineration after on-site collection, resulting in serious secondary contamination. For this reason, a new portable moving solid fuel production system is currently under development and aims to establish optimal operating conditions for the system. The discharge port temperature (℃), Revolution Per Minute(RPM), and waste PE content (wt.%) Of coastal waste were set as independent variables and the molding density (g/cm3) was set as the dependent variable. It can be confirmed that the pellet density increases as the discharge port temperature and the pellet density as the screw rotation speed decreases. We also found that the PE-based coastal waste content does not affect the molding density.

Algae biomass are suitable carbonaceous precursors. Hierarchical porous carbons were prepared from Chlorella ellipsoidea, one of algae through centrifugation, freeze-drying and carbonization. The activation was carried out by a simple process that involved H2O2 treatment followed by microwave pyrolysis. The adsorption equilibrium and kinetic data of methylene blue were fitted with isotherm and kinetic models, respectively. In addition, the electrochemical properties were measured by cyclic voltammetry. It was found that microwave-assisted porous carbons exhibited higher adsorption capacity and excellent electrochemical performance due to the well-developed hierarchical pore structures.