• Advances in biomechanics and applications
• /
• v.1 no.3
• /
• pp.159-167
• /
• 2014

The aim of this study was to evaluate the influence of disc thickness on the normal behavior of the temporomandibular joint. Based on a specific patient case, CT scan images showing accentuated wear in the right disc were reconstructed and the geometrical and finite element model of the temporomandibular joint structures (cranium, mandible, articular cartilages and articular discs) was developed. The loads applied in this study were referent to the five most relevant muscular forces acting on the temporomandibular joint during daily tasks such as talking or eating. We observed that the left side structures of the temporomandibular joint (cranium, mandible and articular disc) were the most affected as a consequence of the wear on the opposite articular disc (right side). From these results, it was possible to evaluate the differences in the two sides of the joint and understand how a damaged articular disc influences the behavior of this joint and the possible consequences that can arise without treatment.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2017.11a
• /
• pp.30-31
• /
• 2017

본 연구는 내항상선에 승선하는 외국인 선원을 대상으로 한 표준 해사한국어 교육과정의 설계를 위한 기초 연구이다. 현재 국내선원의 부족으로 외국인 선원이 증가함에 따라 의사소통 문제를 둘러싼 여러 논의가 진행 중이다. 본 연구의 최종 목표는 혼승 선박에서의 보다 원활한 의사소통을 위해 일상 업무의 수행에 필요한 주요 대화를 선정하여 이것을 외국인 선원을 위한 표준 해사한국어 교육과정에 반영하고자 하는 것이다. 이를 위해 여기에서는 문헌 연구와 설문 조사를 실시하여 부원의 일상 업무를 목록화하고 이들 업무의 중요도와 빈도를 조사하였다. 먼저 각국 대학에서 사용 중인 해사영어 교재와 내항상선의 외국인 선원을 교육하기 위한 교육 자료를 살펴봄으로써 1차적으로 공통되는 업무를 추출하였다. 다음으로 승선 유경험자로 구성된 전문가 위원회의 자문을 통해 업무의 범주를 설정하고 세부 업무 내용을 선정하였다. 마지막으로 설문조사를 실시하여 이들 업무의 중요도와 빈도를 조사하였다. 본 연구의 결과를 바탕으로 추후 연구에서 주요 대화를 선정하기로 한다.

• Proceedings of the KSRS Conference
• /
• v.2
• /
• pp.748-751
• /
• 2006

Positioning accuracy by the Global Positioning System (GPS) is of great concern in a variety of research tasks. It is limited due to error sources such as ionospheric effect, orbital uncertainty, antenna phase center variation, signal multipath, and tropospheric influence. In this study, the tropospheric influence, primarily due to water vapour inhomogeneity, on GPS positioning height is investigated. The data collected by the GPS receivers along with co-located surface meteorological instruments in 2003 are utilized. The GPS receivers are established as continuously operating reference stations by the Ministry of the Interior (MOI), Central Weather Bureau (CWB), and Industrial Technology Research Institute (ITRI) of Taiwan, and International GNSS Service (IGS). The total number of GPS receivers is 21. The surface meteorological measurements include temperature, pressure, and humidity. They are introduced to GPS data processing with 24 troposphere parameters for the station heights, which are compared with those obtained without a priori knowledge of surface meteorological measurements. The results suggest that surface meteorological measurements have an expected impact on the GPS height. The daily correction maximum with the meteorological effect may be as large as 9.3 mm for the cases of concern.

• Journal of Families and Better Life
• /
• v.21 no.5
• /
• pp.51-59
• /
• 2003

Many parents recognize the importance of social development during early childhood but they feel difficulty in helping their children develop socially. Recently, many researchers have suggested that maternal cognition is an important factor on their parenting behavior and children's development. Thus, this study attempted to investigate the mother's perception and attribution of parenting efficacy for children's social development. Total 247 mothers of three to five year-old children reported self-questionnaire consisting of Melson, Ladd, & Hsu(l993)'s Perceived Difficulty at Parenting Tasks, Criniic & Greenberg(1990)'s Parenting Daily Hassles and Abdin(1990)'s Parenting Alliance Inventory. Also, 82 of the subject's children were individually tested with McGinnis & Goldstein(1990)'s Skill Situations Measure. The major results were as follows: 1) Mothers' parenting efficacy for children's social development was significantly related with child's age, mother's education and the father's cooperation of parenting. 2) Mothers' perceived parenting efficacy was significantly correlated with some dimension of the child's actual social skill (i.e., maintenance of peer relation). 3) Mothers of young children were more likely to attribute to their children for their parenting efficacy than those of old children. 4) Mothers were more likely attribute to their children than themselves when they perceive parenting difficult. 5) Mothers who perceive parenting easy and attributed it to their children had less parenting stress than those of attributing it to themselves.

• Journal of Korean Academy of Nursing
• /
• v.27 no.3
• /
• pp.601-613
• /
• 1997

This project was conducted using a survey method and through interviewing with four persons aged 60 years and over. An interview with an open-ended questionnaire was also used for elderly persons, families, oriental medicine doctor and nurses. topic-related literature review was also done. In total, 382 statements were derived. For content validity, nursing professionals were involved in this study, From that 48 items are developed. The subjects were 340 elderly persons over 60 years old. Data were collected duicing February and March 1997 and analyzed using the SPSS package The result are as follows. 1. Items with low Cronbach Coefficient alpha which means low correlation with total items were removed. 2. Factor analysis was done in order to confirm construct validity and eight factors were obtained from the results. The first factor, 'positive cognition of the aging process', the second factor, 'relationship network' the third factor, 'maintanence of physical functioning, the fourth factor', 'maintanence of peaceful mind' the fifth factor, 'keeping up with daily tasks' the sixth factor, 'continuous adequate body movement' the seventh factor,'involvement of religion in the elderly person's life and the eight factor', 'appropriate resting'. Cronbach Coefficient alpha for the 33 items was .9127 Based on the result, the following is suggested 1. It is anrticipated that the fundamental health of elderly person could be promoted by assessing healthy behaviors of elderly person with this assessment tool. 2. Further studies could be derived from this research. 3. Validity of this assessment tool should be further tested with and a larger sample of elderly person including in-patient elderly persons as well as nursing home residents.

• Journal of Environmental Science International
• /
• v.26 no.5
• /
• pp.549-561
• /
• 2017

Recently IPCC (International Panel on Climate Change, 2007) pointed out that global warming is a certain ongoing process on the earth, due to which water resources management is becoming one of the most difficult tasks with the frequent occurrences of extreme floods and droughts. In this study we made runoff predictions for several control points in the Geum River by using the watershed runoff model, SSARR (Streamflow Synthesis and Reservoir Regulation Model), with daily RCP 4.5 and RCP 8.5 scenarios for 100 year from 1st Jan 2006 to 31st Dec 2100 at the resolution of 1 km given by Climate Change Information Center. As a result of, the Geum River Basin is predicted to be a constant flow increases, and it showed a variation in the water circulation system. Thus, it was found that the different seasonality occurred.

• Korean Journal of Human Ecology
• /
• v.13 no.4
• /
• pp.537-553
• /
• 2004

This ethnographic case-study explores the daily experiences in child-rearing and education among Korean full-time housewives. For this purpose, 11 full-time housewives in their thirties and forties from the middle class were interviewed with an unstructured questionnaire. The findings are as follows: Full-time housewives tend to assume the full responsibility for child-caring and education. Their time is structured around the schedules of caring children and participating in educational programs for children. The most demanding tasks for them include preparing for a preschool, getting the children ready for school, rendering supports for children's schools, extra curricular education, and arranging and offering gift money to teachers. They feel that their husbands do not provide enough supports for child-caring and education. Despite all the negative experiences, Korean full-time housewives put in whatever they have to make sure their children's well-being and to provide the best education possible for their children; the maternal identity plays a role of the utmost importance in them.

• Journal of the Korean Society for Precision Engineering
• /
• v.34 no.2
• /
• pp.115-123
• /
• 2017

This paper presents the design and the control performance of a novel dynamic compliant-arm support with parallel elastic actuators that was developed to assist with the daily living activities of those whose arms are compromised by muscular disease or the aging process. The parallel elastic-arm support consists of a compliant mechanism with combined passive and active components for human interaction and to reach the user's desired positions. The achievement of these tasks requires impedance control, which can change the virtual stiffness, damping coefficients, and equilibrium points of the system; however, the desired-position tracking by the impedance control is limited when the end-effector weight varies according to the equipping of diverse objects. A prompt algorithm regarding weight calibration and friction compensation is adopted to overcome this problem. A result comparison shows that, by accurately assessing the desired workspace, the proposed algorithm is more effective for the accomplishment of the desired activities.

• Journal of the Korea Safety Management & Science
• /
• v.9 no.5
• /
• pp.17-25
• /
• 2007

All of the city gas companies in Korea must employ the gas safety patrols by law. The gas safety patrols are responsible for the various tasks including daily gas pipeline patrol to prevent gas accidents. Since the size of jurisdiction varies among the city gas companies, it is very difficult to compare their efficiency for the operations of the safety patrol each other directly. The objective of this research is to develop the methodology to analyze and compare the efficiency of the safety patrol's operations among various city gas companies. Several factors that are related to the safety patrol's duty on the gas safety factors were identified and DEA(Data Envelopment Analysis) model for efficiency analysis was developed. Finally, the DEA model was applied to the collected data from six city gas companies. The less efficient city gas companies can benchmark the higher efficient city gas companies in order to improve the safety control systems.

• 한국신재생에너지학회:학술대회논문집
• /
• 2011.11a
• /
• pp.59.2-59.2
• /
• 2011

This study presents a new method for coupling ArcGIS (popular GIS software) with TRaNsient SYstems Simulation (TRNSYS, reference software for researchers and engineers around the world) to use capabilities of the 4 and 5-parameter PV array performance models within the ArcGIS environment. Using the validated and industry-proven solar energy simulation models implemented in TRNSYS and other built-in ArcGIS functionalities, dynamic characteristics of distributed PV potential in terms of hourly, daily or monthly power outputs can be investigated with considerations of diverse options in selecting and mounting PV panels. In addition, the proposed method allows users to complete entire procedures in a single framework (i.e., a preliminary site survey using 3D building models, shading analyses to investigate usable rooftop areas with considerations of different sizes and shapes of buildings, dynamic energy simulation to examine the performances of various PV systems, visualization of the simulation results to understand spatially and temporally distributed patterns of PV potential). Therefore tedious tasks for data conversion among multiple softwares can be significantly reduced or eliminated. While the programming environment of TRNSYS is proprietary, the redistributable executable, simulation kernel and simulation engine of TRNSYS can be freely distributed to end-users. Therefore, GIS users who do not have a license of TRNSYS can also use the functionalities of solar energy simulation models within ArcGIS.