• Korea Trade Review
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• v.41 no.5
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• pp.305-323
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• 2016

The scope of umbrella clause is very important because it is possible to extend or reduce the range of protection of the investment. Umbrella clause stipulated in the majority of BIT is often controversial, since there is no established criteria for the scope. So, this study considered ICSID arbitration cases related to the scope of umbrella clause. There are two different approaches for the scope of umbrella clause by arbitral tribunals. First, all of the disputes on the investment contract elevated to the disputes on the BIT. And umbrella clause can be applied that the host state entered into investment contract not only as a sovereign but also as a merchant. Second, all of the claims on the investment contract don't elevate to the claims on the BIT. Umbrella clause can be applied only if the host state violates the protected investment contractual rights and obligation under the BIT. And umbrella clause can be applied that the host state entered into investment contract as a sovereign but not as a merchant. Therefore, this study suggests to concretely specify the scope of umbrella clause under the BIT. And it is necessary to improve predictability by establishing continual database of the scope of umbrella clause and to prepare for investment disputes related to the scope of umbrella clause.

• Journal of Internet of Things and Convergence
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• v.9 no.1
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• pp.57-64
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• 2023

In this paper, we propose a smart umbrella stand based on the Internet of Things (IoT) that helps people to pack their umbrellas more easily. The proposed smart umbrella stand offers three functions. First, it receives weather information, and a hidden umbrella handle will automatically become visible when it rains, making it easier to grab. Second, the smart umbrella stand is equipped with a heated air system, allowing it to effectively dry umbrellas that have become wet due to rain. This makes it more convenient for users to dry and store their rain-soaked umbrellas. Third, the smart umbrella stand enables users to monitor its current status, track weather conditions, and monitor the water level in the rain gutter through a dedicated application. The proposed smart umbrella stand aims to bring convenience to daily life by making it more convenient to carry an umbrella on rainy days or days with a high probability of rain.

• Korean Journal of Mathematics
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• v.31 no.3
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• pp.295-303
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• 2023

This paper introduces a novel method for obtaining umbrella matrices, which are defined as orthogonal matrices with row sums of one, using skew-symmetric matrices and Cayley's Formula. This method is presented for the first time in this paper. We also investigate the kinematic properties and applications of umbrella matrices, demonstrating their usefulness as a tool in geometry and kinematics. Our findings provide new insights into the connections between matrix theory and geometric applications.

• Journal of Korean Society for Quality Management
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• v.21 no.2
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• pp.179-193
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• 1993

Modifications of t he weighted Mack-Wolfe tests are proposed for both cases when the peak of umbrella is known and unknown. The modified weighted Mack-Wolfe tests are exactly distribution-free when the continuous populations have the same shape. For the case of peak-known umbrella alternatives, the modified weighted Mack-Wolfe tests remain asymptotically distribution-free when the continuous populations are symmetric, but not necessarily with the same shape. For the case of peak-unknown umbrella alternatives, the maximum of standardized modified weighted Mack-Wolfe tests with peak-known umbrella alternatives was used. The simulation results show that the modified weighted Mack-Wolfe tests are more recommended than the modified Mack-Wolfe tests for various patterns.

• Proceedings of the Korean Geotechical Society Conference
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• 1995.10a
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• pp.211-216
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• 1995

In recent years, Natm has been successfully applied to difficult ground conditions with the use of soil-perservention methods which promote face stability and restrict excessive ground movement. When the tunnle excavation od made through difficult ground like highly weathered rock, the umbrella arch method is often adopted which pre-reinforceas tunnel crown periphery using a stiff shell-shaped structure. The umbrella arch method was originally developed in Itali, and has recently been confirmed its effectiveness in Korea as well. However, no in depth study on the umbrella arch method has been conducted ans as a result no rational analysis/design method is available at present. Therefore this study was undertaken with the aim of identifying the basic reinforcing mechanism and satablishing both qualitative and quantiative relationships between various design parameters and ground movements.

• Journal of the Korean Society of Safety
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• v.22 no.3 s.81
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• pp.45-50
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• 2007

In this study, reinforcing effects of umbrella-type shell roofs structures such as stadium, exhibition, auditorium and museum are analyzed. Umbrella-type shell roofs treated in this study are practical shapes of conical shells. The objective of this study is to analyze reinforcing effects of umbrella-type shell roofs with stiffeners. Various locations of stiffeners, that is, edge ring A, B, center ring, junction stringer and center stringer are presented and the effects of reinforcement is examined. Also, the reduction effects of roofs thickness by stiffeners are examined. It is shown that the thickness of roofs can be reduced about $20{\sim}30%$ by junction stringer and more than 60% by edge ring A.

• The Korean Journal of Applied Statistics
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• v.28 no.6
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• pp.1181-1189
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• 2015

The treatment effect in clinical tests depending on dose of the drug; however, it can show a decreasing trend in fixed dose level due to side effects. The trend is known as an umbrella pattern; in addition, the method for the umbrella alternative is quite useful when the tendency is predicted in advance. In this paper, we propose a nonparametric method of umbrella alternatives for a one-way layout by using linear placement described in Orban and Wolfe (1982). The Monte Carlo simulation is adapted to compare the power of proposed procedure with previous methods.

• Journal of Arbitration Studies
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• v.18 no.2
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• pp.149-171
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• 2008

The purpose of this paper is to examine the Measures against Risks in International Investment Agreement: focusing on Umbrella Clause and MIGA. Umbrella Clauses have become a regular feature of international investment agreements and have been included to provide additional protection to investors by covering the contractual obligations in investment agreements between host countries and foreign investors. The meaning of umbrella clauses is one of the most controversial issues with which international arbitral tribunals have been recently confronted with while adjudicating investment disputes brought before them MIGA issues guarantees against non-commercial risks for investments, such as: currency transfer restrictions, expropriations, war and civil disturbances and breach of contract by host governments, and the case that the investor obtains an arbitration award or judical decision for damages and is unable to enforce it after a specified period. Furthermore, MIGA undertakes a wide range of mediation activities designed to remove obstacles to the flow of foreign direct investment in its developing member countries.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.2
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• pp.239-246
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• 2020

In this paper, an automatic dewatering system for drying water from umbrellas is proposed. In the past, there were problems that users had to put on plastic for removing the water from umbrella by covering it with a plastic or using a water dryer that removes water by manually touching the umbrella to the water surface. But this method was hard to expect. To solve these problems, an air compressor was used to develop a system to remove water from the umbrella by detecting the weight of the umbrella with pressure sensor when the user puts the umbrella into the dewatering machine and driving the motor. It is expected that this invention will have economic and environmental effects by eliminating the use of waste vinyl.

• Proceedings of the Korean Geotechical Society Conference
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• 1994.09a
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• pp.217-224
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• 1994