• International Journal of Internet, Broadcasting and Communication
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• v.9 no.1
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• pp.24-28
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• 2017

In the Internet of Things (IoT), resource-limited smart devices communicate with each other while performing sensing and computation tasks. Thus, these devices can be exposed to various attacks being launched and spread through network. For instance, attacker can reuse the codes of IoT devices for malicious activity executions. In the sense that attacker can craft malicious codes by skillfully reusing codes stored in IoT devices, code-reuse attacks are generally considered to be dangerous. Although a variety of schemes have been proposed to defend against code-reuse attacks, code randomization is regarded as a representative defense technique against code-reuse attacks. Indeed, many research have been done on code randomization technique, however, there are little work on analysis of the interactions between code randomization defenses and code-reuse attacks although it is imperative problem to be explored. To provide the better understanding of these interactions in IoT, we analyze how code randomization defends against code-reuse attacks in IoT and perform simulation on it. Both analysis and simulation results show that the more frequently code randomizations occur, the less frequently code-reuse attacks succeed.

• Journal of the Korea Institute of Military Science and Technology
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• v.26 no.5
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• pp.409-421
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• 2023

In the air power, UAVs have played a large and diversified role in performing missions from simple to high-level complex ones. In particular, the suppression of enemy air defenses(SEAD) is very dangerous for a pilot so it is expected that the manned-unmanned teaming(MUM-T) system with tailless stealthy unmanned aerial vehicle(UAV) will greatly enhance effectiveness of the mission while ensuring the pilot safe. This paper describes simulation studies of remote airborne control(RAC) environment for performing the SEAD mission by MUM-T, by which the air force pilot remotely controls tailless UAVs individually or small UAVs in swarm. Through this simulation, air force pilot can derive the concept of MUM-T mission operation with various UAVs in the future, and it can be used to upgrade the MUM-T system by verifying the effectiveness of the mission.

• Convergence Security Journal
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• v.14 no.6_1
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• pp.129-138
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• 2014

South Korea should correspond to the primary threat to North Korea's nuclear weapons. It is necessary to have countermeasures to solve the realistic problems of North Korea's nuclear weapons. We can intensify military pact between the United States and Korea and at the same time strengthening the current military power. Currently, we take note the threat North Korea's missile. We can not control the development of a nuclear weapon and there are possibilities that North Korea have successfully miniaturized nuclear enough to carry by the missile. We should overview and check the Korea's missile defenses system. While the direction of the overall missile defense system deployment with a focus on lower and upper air defense network. And discuss defense research should be to build a system that can be protected with a key strategic facilities and cities. While North Korea have nuclear weapon, the main issues related to North Korea's nuclear threat. The six party talks countries try to solve the problem by the international and diplomatic approach. At the same time we should make somewhat to defend measures such as military defenses of Kill chain system to protect our country. Kill Chain is on of the effective defense system. We know that North Korea do not abandon to develop nuclear weapons by diplomatic efforts. We should performed in fact by a variety of military suppression method.

• Journal of Arbitration Studies
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• v.29 no.4
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• pp.57-75
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• 2019

In investigating how set-off defenses matter in arbitration, one should take into account that it is not permitted against the parties' will for arbitrators to rule on the disputes that are not the subject of an arbitration agreement, unless otherwise agreed upon by the parties involved, because it is considered that the parties intend to solve only the disputes which are the subject of the agreement by arbitration. Also, one should keep in mind that the parties must settle the disputes that are the subject of an arbitration agreement by arbitration when they conclude the agreement, and it is not allowed against the parties' will to resolve the disputes in other ways. The parties may agree whether the respondent can request for arbitration on the counterclaim, which is his/her claim against the claimant, and whether the respondent can raise a plea for a set-off that his/her claim against the claimant is a counter obligation. Failing on such agreement, the respondent may submit a counterclaim when his/her claim and the claimant's claim are the subject of the same arbitration agreement. The arbitral tribunal may rule on the counter obligation when the arbitration agreement, which becomes the basis for the claimant' claim, has an effect on the counter obligation. Where the claimant fails to raise an objection even after he/she becomes aware that the respondent has requested for arbitration or has raised a plea for set-off by providing his/her claim which is not the subject of the arbitration agreement as a counterclaim or a counter obligation, the arbitral tribunal may rule on the respondent's claim against the claimant. On these occasions, the arbitral tribunal has to guarantee the parties an opportunity to defend themselves by pointing out those situations. It will meet the purposes of arbitration systems to rule out the jurisdiction of the courts when the plaintiff alleges the existence of the arbitration agreement, in case the respondent raises a plea for set-off based on his/her claim which is not the subject of the arbitration agreement in the litigation procedures. However, where the plaintiff fails to allege the existence and conducts pleading in the court with regard to the counter obligation, the court must not reject the respondent's set-off defense because of the existence of the agreement.

• Maritime Security
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• v.6 no.1
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• pp.109-135
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• 2023

The North Korean military's maneuver toward Honam was the fastest maneuver the North Korean army had demonstrated during the Korean War, and it was a threatening attack that forced the Korean and Allied forces to fully adjust the defenses of the Nakdong River. However, when this study analyzed the North Korean military's maneuver toward Honam in terms of indirect approach strategy, there were a number of factors that inevitably led to its failure. In terms of implementing the indirect approach strategy, the North Korean military cited a number of failure factors, including the dispersion of combat forces, the inflexibility of changing the line of operation, the maneuvering of ground forces, and the lack of psychological distaction. However, the North Koreans were preparing for a final "surprise attack," in which the 7th Division, which was following the North Korean 6th Division, took another diversion and attempted to attack in the direction of Tongyeong. With this, the North Koreans intended to break through the Nakdong River defenses and head for Pusan. However, the North Korean attack was ultimately thwarted by the Korean Navy and Marine Corps' Tongyeong Amphibious Operation. With a swift maneuver using the sea as a maneuvering space, the Navy and Marine Corps occupied key points first, creating an advantageous situation and fending off an attack by the North Korean 7th Division. The Navy and Marine Corps' Tongyeong Amphibious Operation finally thwarted the North Korean military's maneuver toward Honam, thus maintaining the Nakdong River defenses.

• Journal of the Korea Society for Simulation
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• v.33 no.2
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• pp.37-44
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• 2024

The Korean Helicopter Development Program has successfully introduced the Surion helicopter, a versatile multi-domain operational aircraft that replaces the aging UH-1 and 500MD helicopters. Specifically designed for maneuverability, the Surion plays a crucial role in low-altitude tactical maneuvers for personnel transportation and specific missions, emphasizing the helicopter's survivability. Despite the significance of its low-altitude tactical maneuver capability, there is a notable gap in research focusing on multi-mission tactical maneuvers that consider the risk factors associated with deploying the Surion in the presence of enemy air defenses. This study addresses this gap by exploring a method to enhance the Surion's low-altitude maneuvering paths, incorporating information about enemy air defenses. Leveraging the Proximal Policy Optimization (PPO) algorithm, a reinforcement learning-based approach, the research aims to optimize the helicopter's path planning. Visualized experiments were conducted using a Surion model implemented in the Unity environment and ML-Agents library. The proposed method resulted in a rapid and stable policy convergence for generating optimal maneuvering paths for the Surion. The experiments, based on two key criteria, "operation time" and "minimum damage," revealed distinct optimal paths. This divergence suggests the potential for effective tactical maneuvers in low-altitude situations, considering the risk factors associated with enemy air defenses. Importantly, the Surion's capability for remote control in all directions enhances its adaptability in complex operational environments.

• Journal of the Korean Operations Research and Management Science Society
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• v.8 no.1
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• pp.11-18
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• 1983

This paper shows a new efficient solution method of finding an optimal path for a cruise missile or aircraft to a target which has the maximal survivability and penetration effectiveness against sophisticated defenses and over varied terrain. We first generate a grid structure over the terrain, to construct a network. Since our network usually has about 10,000 nodes, the conventional Dijkstra algorithm takes too much computational time in its searching process for a new permanent node. Our method utilizes the Hashing technique to reduce the computational time of the searching process. Extensive computational results are presented.

• Journal of the Korean Society of Tobacco Science
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• v.14 no.2
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• pp.168-195
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• 1992

Pulmonary system is a target organ and primary defense mechanism against environmental oxidants and polutants. Enzymatic and nonenzymatic antioxdant defense mechanisms undoubtedly protect the lung from oxidants even endogenous oxidative stress. In addition, new ways of augmenting pulmonary antioxidant defenses are developed, which can be used to support the intrinsic antioxidants. Therefore, improved understanding of antioxidant defense mechanisms will increase our knowledge of the cause and will suggest rational approaches for treating and preventing oxidant-induced lung injury. In this review, we discuss the formation and scavenging of free radicals, and the strategies for antioxidant defense of pulmonary system.

• Journal of Arbitration Studies
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• v.22 no.3
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• pp.47-69
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• 2012

This paper investigates the U.S. courts'attitudes toward the legal doctrine of adhesion contracts, which have been employed as contract defenses by individual consumers who have entered into consumer arbitration agreements with businesses. Some requirements have been added to the sole adhesiveness of the arbitration clause that can invalidate the arbitration clause, including unconscionability and unreasonable harshness. It seems that the U.S. courts have moved toward a more tightened stance in evaluating the validity of consumer arbitration clauses, favoring consumer arbitration.

• Proceedings of the Ginseng society Conference
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• 2005.05a
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• pp.16-18
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• 2005