• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.241-247
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• 2018

Deep-sea fishing vessel No. 501 Oryong was fully flooded through its openings and sunk to the bottom of the sea due to the very rough sea weather on the way of evasion after a fishing operation in the Bearing Sea. As a result, many crew members died and/or were missing. In this study, a full-scale ship flooding and sinking simulation was conducted, and the sinking process was analyzed for the precise and scientific investigation of the sinking accident using a highly advanced Modeling & Simulation (M&S) system of the Fluid-Structure Interaction (FSI) analysis technique. To objectively secure the weather and sea states during the sinking accident in the Bering Sea, time-based wind and wave simulation at the region of the sinking accident was conducted and analyzed, and the weather and sea states were realized by simulating the irregular strong wave and wind spectrums. Simulation scenarios were developed and full-scale ship and fluid (air & seawater) modeling was performed for the flooding sinking simulation, by investigating the hull form, structural arrangement & weight distribution, and exterior inflow openings and interior flooding paths through its drawings, and by estimating the main tank capacities and their loading status. It was confirmed that the flooding and sinking accident was slightly different from a general capsize and sinking accident according to the simple loss of stability.

• Current Optics and Photonics
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• v.7 no.1
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• pp.38-46
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• 2023

Optical Fourier-domain reflectometry (OFDR) sensors have been widely used to measure distances with high resolution and speed in a noncontact state. In the electroplating process of a printed circuit board, it is critically important to monitor the copper-plating thickness, as small deviations can lead to defects, such as an open or short circuit. In this paper we employ a phase-based OFDR sensor for in situ relative distance sensing of a sample with nanometer-scale resolution, during electroplating. We also develop an optical-path difference (OPD)-regulated sensing probe that can maintain a preset distance from the sample. This function can markedly facilitate practical measurements in two aspects: Optimal distance setting for high signal-to-noise ratio OFDR sensing, and protection of a fragile probe tip via vertical evasion movement. In a sample with a centimeter-scale structure, a conventional OFDR sensor will probably either bump into the sample or practically out of the detection range of the sensing probe. To address this limitation, a novel OPD-regulated OFDR system is designed by combining the OFDR sensing probe and linear piezo motors with feedback-loop control. By using multiple OFDR sensors, it is possible to effectively monitor copper-plating thickness in situ and uniformize it at various positions.

• Korean Chemical Engineering Research
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• v.44 no.2
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• pp.136-148
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• 2006

A foundry makes various machinery parts made by iron. For manufacturing machinery parts, they usually uses wooden mold with molding sand and pour the molten iron into wooden mold through inlet. A foundry have many processes including Furan process, In Furan process workers prepares a wooden mold in the molding sand. So they fixes wooden mold in sand housing and then they fill the molding sand in the sand housing. Molding sand should be sticky enough to sustain the shape of wooden mold, so several materials are needed to prepare the suitable molding sand. The first step of Furan process is making the molding sand with molding sand and Voltaic Organic Compounds (VOC) and the second step of Furan process is pour the molding sand into the wooden molding housing. This two step of process generated noxious VOC and various size of dust. So the process is very dirty and dangerous one. Because of these, Workers frequently shrink out of the plant. The company related with foundry usually faced on the difficult situation for engagement and always have shortage of hiring problem. Through this study, we developed a system which removes toxic VOC and dust simultaneously. We design and construct real system and install it at real plant. Before setting up this system, the working surroundings VOC (for formaldehyde) 15 ppm and Dust(for $PM_{10}$) $8,000{\mu}g/m^3$. After setting up this system, working surroundings is improved by VOC (for formaldehyde) 0 ppm, Dust(for $PM_{10}$) $4{\mu}g/m^3$, and the work evasion factor is removed. So we contribute to solve hiring problem of this company and increasing the productivity also.

• Journal of the Korean association of regional geographers
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• v.7 no.4
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• pp.120-145
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• 2001

Environmental risk is one of major risks in contemporary society which is often conceptualized in terms of 'risk society'. The crisis which retains such environmental risk can be characterized by 'technical hazards', rather than natural hazards in traditional societies, because of potentiality of technical control over its generation and managing process. Environmental crisis tends to be recurred due to certain limitations of response of both government and civil society. Moreover, it can be argued that generation of environmental crisis and limitations of its managing process are inherent in problematic structures in contemporary society, especially in its 4 basic elements and their characters; that is, capitalist market economy which promotes increasing profits and decreasing cost; bureaucratic representative politics which has brought about concentration of power and evasion of responsibility, instrumental science and technology which leads to blind belief on scientific knowledge and its uncertainty; and finally individualistic way of life with exclusive and passive response to crisis. This paper aims to consider the generation and managing process of environmental crisis in terms of these 4 basic elements, with comparative studies on empirical cases of the water crisis by Phenol pollution in Taegu in 1991 and the water crisis by parasites contamination in Sydney in 1998.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.19
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• pp.8203-8207
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• 2014

Purpose: The aim of this study was to investigate the relationship between cell adhesion and anoikis evasion among human osteosarcoma cells (MG-63), and to further study the molecular mechanisms. Materials and Methods: Human osteosarcoma cells (MG-63) were assessed for apoptosis, and caspase-3, E-cadherin and ${\beta}$-catenin expression in EDTA and control non-EDTA groups. Results: MG-63 cells were predominantly aggregated when in suspension, and the suspended cells were more dispersed in the EDTA group. Following culture in suspension for 24 h, 48 h, or 72 h, the rates of apoptosis were $34.88%{\pm}3.64%$, $59.3%{\pm}7.22%$ and $78.5%{\pm}5.21%$ in the experimental group and $7.34%{\pm}2.13%$, $14.7%{\pm}3.69%$, and $21.4%{\pm}3.60%$ in the control group, respectively. Caspase-3 expression progressively increased and E-cadherin and ${\beta}$-catenin were decreased in the experimental group, whereas there was no change in the control group. Conclusions: MG-63 cells could avoid anoikis through cell adhesion, and E-cadherin might play a role in this process.

• Journal of Korean Academy of Nursing
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• v.32 no.4
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• pp.447-458
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• 2002

The primary purpose of this study is to provide a useful insight for developing effective teaching and student counseling methods by understanding the relationship between four preference patterns of MBTI personality types and EWHA defense mechanisms of nursing college students. Method: The data used in this research were collected administrating EWHA defense mechanism test and MBTI personality type instrument to 195 nursing students in the period of November 3 through September 16 in 2000. Collected data were analysed by pc-SPSS 10.0. Result: Three general conclusions were drawn from the study results: (1) in terms of personality type, 'Extraversion', 'Sensing', 'Thinking', and 'Judgement' types showed high frequency respectively; (2) in terms of defense mechanism, 'Identification' showed the highest score, and then 'suppression' scored next followed by 'Humor'. However, 'Acting out' showed the lowest average score, and then 'Projection' followed by 'Denial'; (3) Based on the relationship between defense mechanism and four MBTI preference patterns, it can be drawn that students with the preference of 'Extraversion' usually use defense mechanism of 'Altruism', 'Sublimation', 'Distortion', 'Controlling', and 'Humor'. In comparison, students with the preference of 'Introversion' often use the defence mechanism of 'Evasion' and 'Projection'. Conclusion: The study results can be utilized in both fields of education and counseling: (1) in the field of education, this study can provide a basis for developing a suitable teaching method for each personality types of nursing students; (2) for counseling practitioners, the results of this study provide the useful insights to understand nursing college students' communication skills, behavior patterns, and ability of coping with problems in the process of counseling.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.6
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• pp.1043-1053
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• 2023

Malware analysts work diligently to analyze and counteract malware, while developers persistently devise evasion tactics, notably through packing and obfuscation techniques. Although previous works have proposed general unpacking approaches, they inadequately address techniques like OEP obfuscation and API obfuscation employed by modern packers, leading to occasional failures during the unpacking process. This paper examines the OEP and API obfuscation techniques utilized by various packers and introduces a system designed to automatically de-obfuscate them. The system analyzes the memory of packed programs, detects trampoline codes, and identifies obfuscated information, for program reconstruction. Experimental results demonstrate the effectiveness of our system in de-obfuscating programs that have undergone OEP and API obfuscation techniques.

• Biomolecules & Therapeutics
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• v.32 no.3
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• pp.267-280
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• 2024

Apoptosis, programmed cell death pathway, is a vital physiological mechanism that ensures cellular homeostasis and overall cellular well-being. In the context of cancer, where evasion of apoptosis is a hallmark, the overexpression of anti-apoptotic proteins like Bcl2, Bcl-xL and Mcl-1 has been documented. Consequently, these proteins have emerged as promising targets for therapeutic interventions. The BCL-2 protein family is central to apoptosis and plays a significant importance in determining cellular fate serving as a critical determinant in this biological process. This review offers a comprehensive exploration of the BCL-2 protein family, emphasizing its dual nature. Specifically, certain members of this family promote cell survival (known as anti-apoptotic proteins), while others are involved in facilitating cell death (referred to as pro-apoptotic and BH3-only proteins). The potential of directly targeting these proteins is examined, particularly due to their involvement in conferring resistance to traditional cancer therapies. The effectiveness of such targeting strategies is also discussed, considering the tumor's propensity for anti-apoptotic pathways. Furthermore, the review highlights emerging research on combination therapies, where BCL-2 inhibitors are used synergistically with other treatments to enhance therapeutic outcomes. By understanding and manipulating the BCL-2 family and its associated pathways, we open doors to innovative and more effective cancer treatments, offering hope for resistant and aggressive cases.

• Journal of Navigation and Port Research
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• v.41 no.6
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• pp.451-466
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• 2017

Deep-sea fishing vessel No. 501 Oryong was fully flooded through its openings and sunk to the bottom of the sea due to the very rough sea weather on the way of evasion after a fishing operation in the Bearing Sea. As a result, many crew members died and/or were missing. In this study, a full-scale ship flooding sinking simulation was conducted, and the sinking process was analyzed for the precise and scientific investigation of the sinking accident using highly advanced Modeling & Simulation (M&S) system of Fluid-Structure Interaction (FSI) analysis technique. To objectively secure the weather and sea states during the sinking accident in the Bering Sea, time-based wind and wave simulation at the region of the sinking accident was carried out and analyzed, and the weather and sea states were realized by simulating the irregular strong wave and wind spectrums. Simulation scenarios were developed and full-scale ship and fluid (air & seawater) modeling was performed for the flooding sinking simulation, by investigating the hull form, structural arrangement & weight distribution, and exterior inflow openings and interior flooding paths through its drawings, and by estimating the main tank capacities and their loading status. It was confirmed that the flooding and sinking accident was slightly different from a general capsize and sinking accident according to the simple loss of stability.

• Journal of Korean Home Economics Education Association
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• v.23 no.3
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• pp.139-160
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• 2011

The purpose of this study is twofold: (i) to develop a teaching and learning plan and practical performance assessment tools for the improvement of teenager-parent communication and relationships as well as explore their effects on the communication in the everyday family life; and (ii) to find the underlying problems of teenager- parent communication through conversation analysis and to provide a improved dialogue model. We provided the experimental group with a performance task of communication training between teenagers and their parents in the real family situation while the control group practiced communication skills in a learning situation. However for both classes, before and after performance tasks were equally provided. The experimental group exhibited a longer conversation time with their parents, better communication skills, and higher degrees of relational satisfaction than the control group. Conversation analysis revealed that the experimental group reduced the use of blocking techniques in the teenager-parent conversations more than the control group, and all so raised the frequency of functional communications more than the control group. In both areas of communication in the experimental group was significantly improved, Most notably, a problem-solving case through no-lose conflict resolution methods was effective, succeeding by 70% in the e experimental group and 43.3% in the control group. Parents use blocking techniques like admonition, lecturing, blaming. sarcastic remarking, ordering and so forth, while teenagers use dispute, avoidance, blaming, and teasing in this order. The communication problems during the conversation process, teenagers' evasive and rebellious way of speaking instigates adverse communication responses from parents, so their conversation tends to unfold as ambiguous evasion opposed to: inquiring or evasion by short answers vs. ordering-preaching, or disputing vs. criticizing-making sarcastic, disputing vs. disputing-teaching, and criticizing vs. criticizing.