• Journal of Ocean Engineering and Technology
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• v.23 no.2
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• pp.58-68
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• 2009

The increased use of unmanned underwater vehicles (UUV) has led to the development of alternative navigational methods that do not employ acoustic beacons and dead reckoning sensors. This paper describes a simultaneous localization and mapping (SLAM) scheme that uses range sonars mounted on a small UUV. A SLAM scheme is an alternative navigation method for measuring the environment through which the vehicle is passing and providing the relative position of the UUV. A technique for a SLAM algorithm that uses several ranging sonars is presented. This technique utilizes an unscented Kalman filter to estimate the locations of the UUV and surrounding objects. In order to work efficiently, the nearest neighbor standard filter is introduced as the data association algorithm in the SLAM for associating the stored targets returned by the sonar at each time step. The proposed SLAM algorithm was tested by experiments under various three degrees of freedom motion conditions. The results of these experiments showed that the proposed SLAM algorithm was capable of estimating the position of the UUV and the surrounding objects and demonstrated that the algorithm will perform well in various environments.

• Journal of Society of Preventive Korean Medicine
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• v.22 no.3
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• pp.45-60
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• 2018

Background : There have been a variety of healthcare systems related to CAM practitioners developed in each country. However, the European cases have not been widely introduced in Korea so far. In the case of Germany, CAM practices have been developed in the frame of "Heilpraktiker" system. Objectives : The objectives of this study were to review the historical development and current situation of German Heilpraktiker system and its conflicting relationship with Western medical doctors, in order to utilize it as basic data for the conflict resolution between Western- and KM doctors in Korea. Methods : The historical development, current regulations and education system of Heilpraktiker were assessed. Research articles, reports, government publications and websites dealing with this issue were searched for and analyzed. Results : Heilpraktiker system was developed within German historical and cultural situation where naturopathic traditions were reilluminated in connection with modernization process of the state under the influence of romanticism formulating German nationalism. Between the concept of "Kurierverbot"(prohibition on medical treatment by non-physicians) and "Kurierfreiheit"(freedom of medical treatment), Heilpraktiker achieved a limited but legitimated right to conduct non-biomedical treatments from the state in the process of the formulation of modern German medical system. In this process, the conflicts between medical doctors and heilpraktikers have been also growing up to now. Conclusions : Heilpraktiker system, officially recognized with the legislation of Heilpraktiker law in 1939, stands at a crossroads between the continual development through strengthening its professionality, and abolition of the system due to its lack of quality control and medical evidence mostly argued by Western medical doctors, which has considerable implications for Korean situations in terms of the conflicting relationship between KM- and Western medical doctors. In this regard, it is necessary to discuss the debates on the concept "Kurierfreiheit"(freedom of medical treatment) developed within German tradition of medical pluralism.

• Journal of the Ergonomics Society of Korea
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• v.16 no.1
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• pp.97-105
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• 1997

An aircraft simulator for ergonomics testing and pilot training was developed from the joint work Agency for Defense Development(ADD) and Daewoo Heavy Industry, LTD, in Korea at first time. It is basically to satisfy the requirements established by FAA-AC-120-40C ( 1995-JAN-26). The aircraft simulator will be used mainly for ergonomics testing and pilot training for basic trainer on ADD and Korea Air Force in near futrue. This simulator reproduces faithfully the cockpit and flight characteristics of the KTX-1 aircraft. It is one of the latest full flight simulators that have the CGI(computer graphic image) visual system and six degree of freedom motions system. Development efforts focused on user-oriented design approach for ergonomics testing and flight training of pilots. Main characteristics of each subsystem are described such as cockpit, instruments, control loading system, motion system, visual system, aural system, instructor operation station and aircraft simulation softwear.

• Journal of the Korean Home Economics Association
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• v.49 no.2
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• pp.27-36
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• 2011

This study dealt with free play activities in the curricula of childcare centers in Daejeon area. 29 teachers from 21 day care centers were interviewed individually to obtain an understanding of teachers perceptions and conflicting views about play activity in the context of different day care curricula. The data were analysed qualitatively, using categorization and key word classification, frequency analyses and chi-squared tests. The results were as follows: (1) play-oriented curricula included sufficient play time and planned play activities in terms of the children's development. Children's freedom in play, optimum intercession by teachers, and interrelating activities between activity areas were included. In mixed curricula, children's freedoms were limited in many cases, and interrelating play between activity areas was hardly found. Formal lesson-oriented curricula resulted unplanned play activities and teachers' passive intercession of play. (2) Most teachers believed that play activities were more important to a child's development than formal lessons.

• Journal of the Semiconductor & Display Technology
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• v.18 no.2
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• pp.78-81
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• 2019

In this study, we will analyze the design, development and application of these small drones using open source. These drones are used in flight exercises, aerial photography, and coding education. In the era of the fourth industrial revolution, such as the development of sensor technology, expansion of open source sharing, and application of artificial intelligence, Is expected to be able to demonstrate convergence. In this paper, we have studied the design and fabrication of small drones using open source. In the case of drones, various functions and differentiated materials are required depending on the application, and the future development of the unmanned mobile object, namely the drone, in which the creativity and the technology are combined with each other continues to be enhanced by the improvement of autonomy and artificial intelligence. Software-based architecture-based technologies have been developed in collaboration with embedded SWs that combine sensors, motors, and control systems. In hardware, it is customary to use a combination of materials and design to increase the freedom of design. It will be made in a free structure.

• International Commerce and Information Review
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• v.16 no.3
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• pp.121-138
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• 2014

China and Korea have interacted with each other for 20 years since 1992 when China and Korea established diplomatic relations. During this period, the trade and investment between two countries have increased rapidly. In addition to the enhancement of economic cooperation and the expansion of personal exchange, the relationship between two countries was upgraded to mutual strategic cooperative relationship in 2008 from the 1 friendly and cooperative relations and the economic exchange and cooperation were largely expanded. In this paper, the current situation and characteristics of the trade between China and Korea were figured out. In order to find out the development direction of China and Korea trade, through empirical analysis, the correlation of decisive factors that influence the trade amount of these two countries were analyzed. In terms of dependent variables for the empirical analysis, the trade amount between China and Korea was considered. While the GDP of these countries, the direct investment amount of two countries and the openness of external trade of these countries were considered as independent variables. The degree of economic freedom of these countries was set as policy variable. According to the analysis results, when the GDP of China and Korea is getting higher, there is positive influence on the trade amount of China and Korea. It is showed that the direct investment of Korea has positive influence on the trade amount of China and Korea. Meanwhile, there is negative influence of China's direct investment on the trade amount. When the degree of freedom of these countries is getting higher, the influence of trade amount was showed significantly. Furthermore, when the economic freedom of these countries is getting higher, the insignificant things about trade amount of China and Korea were extracted as insignificant.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.22 no.2
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• pp.372-379
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• 1998

A new 6 degrees-of-freedom micro stage, based on parallel mechanisms and actuated by using piezoelectric elements, has been developed for the application of micro positioning such as semiconductor manufacturing devices, high precision optical measurement systems, and high accurate machining. The micro stage structure consists of a base platform and an upper platform(stage). The base platform can effectively generates planar motion with yaw motion, while the stage can do vertical motion with roll and pitch motions with respect to the base platform. This separated structure has an advantage of less interference among actuators. The forward and inverse kinematics of the micro stage are discussed. Also, through linearization of kinematic equations about an operating point on the assumption that the configuration of the micro stage remains essentially constant throughout a workspace is performed. To maximize the workspace of the stage relative to fixed frame, an optimal design procedure of geometric parameter is shown. Hardware description and a prototype are presented. The prototype is about 150mm in height and its base platform is approximately 94mm in diameter. The workspace of the prototype is obtained by computer simulation. Kinematic calibration procedure of the micro stage and its results are presented.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.21-27
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• 2013

With the advent of digital media environment, distribution way of information changes, legalization of the right to be forgotten is becoming increasingly necessary. However, too much emphasis on protection of personal information to hinder the development of the Internet industry and constitutional rights, including freedom of speech and right to know might be infringed. Thus, the scope of the right to be forgotten there is a need to clarify the rules. First, the rights of personal information can be divided into two. Right to be forgotten can be applied to the right to self-determination of personal information, but the right to self-determination information about social personality cannot be applied to. Second, in the digital media environment, old news article over the internet repeatedly distribution as the new damage is generating. Because old news article is a historical record, the right to be forgotten can not be applied. Thus, appropriate for digital media environment must find new ways.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.37 no.3
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• pp.179-186
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• 2024

In this paper, a modification coefficient for equivalent single degree of freedom (SDOF), considering the plasticity range of the member subjected to shock wave type of blast load, was developed. The modification coefficient for the equivalent SDOF was determined through comparison with the analysis of a multi-degree of freedom (MDOF) system. The parameters influencing the equivalent SDOF system analysis were chosen as the boundary conditions of the member and the ratio of the duration of blast load to the natural period of the member. The modification coefficient was calculated based on the elastic load-mass transformation factor. The modification coefficient curve was derived using an elliptical equation to ensure it exists between the upper and lower parameter bounds. Using the modification coefficient on examples with varying cross sections and boundary conditions reduced the SDOF analysis error rate from 15% to 3%. This study shows that using the modification coefficient significantly improves the accuracy of SDOF analysis. The modification coefficient proposed in this study can be used for blast analysis.

• Journal of Oriental Neuropsychiatry
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• v.35 no.1
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• pp.1-13
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• 2024

Objectives: This study aims to develop an educational program based on a manual for disaster medical support using Korean medicine (KM) for disaster survivors. Methods: We conducted a literature review on another educational program, a focus group interviews with experts, a survey of the academic needs of Korean medicine (KM) doctors, educational competency development, and an expert Delphi survey. Results: This program was designed using a hybrid method combining online (4 h) and offline (8 h) elements; the total time of the program is 12 h. The offline course consists of theory (4 h) and practice (4 h) lectures. The theory lecture covers herbal medicine, acupuncture, stabilizing technique, emotional freedom technique, and self-management, and the practice lecture covers stabilizing technique, emotional freedom technique, and clinical performance evaluation. Meanwhile, the online course covers a manual for disaster medical support using KM and an introductory course from the National Center for Disaster and Trauma. Conclusions: The results of this study are expected to be useful for enhancing training for KM doctors in trauma care for disaster survivors as well as evaluating and validating the program's effectiveness.