• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.6 no.2
• /
• pp.19-27
• /
• 1988

In determining the horizontal positions, economic, speedy, and accurate analytical adjustment methods have studied and developed for a long time. From now on, the adjustment methods using both angles and distances are expected because the development of more precise instruments, E.D.M, and electronic total station provide us with more advantages than the conventional measurement system. The objective of this paper is to study the characteristics of triangulation, trilateration, and combination method due to change of the weight factor of angles, distances, azimuthes, and control point coordinates of combined geodetic network. The results of this study show that combined method is more accurate and effective than other methods in case of combined geodetic network as the other simple networks.

• Steel and Composite Structures
• /
• v.32 no.3
• /
• pp.313-323
• /
• 2019

Ratcheting boundary is firstly determined by experiment, elastic-plastic finite element analysis combined with C-TDF and linear matching method, which is compared with ASME/KTA and RCC-MR. Moreover, based on elastic modulus adjustment procedure, a novel method is proposed to predict the ratcheting boundary for a pressurized pipe subjected to constant internal pressure and cyclic bending loading. Comparison of ratcheting boundary of elbow pipe determined by the proposed method, elastic-plastic finite element analysis combined with C-TDF and linear matching method, which indicates that the predicted results of the proposed method are in well agreement with those of linear matching method.

• The Journal of Korean Society for School & Community Health Education
• /
• v.16 no.1
• /
• pp.27-38
• /
• 2015

Objectives: The purpose of this study is to develop programs that help students adjust to school and provide basic data for the students who have difficulty adjusting to school by analyzing the influence of elementary school students' stress and their relationship with parents on school adjustment. Methods: The study surveyed fourth graders in 3 elementary schools in G district. The researcher used convenience sampling to select the 3 elementary schools. The combined 158 students were selected for the analysis, and the survey was conducted for a month in September 2011. The stress monitoring tool used in the 5th year of Korean Youth Panel Survey was mobilized to measure levels of stress among the participants. To measure the parent-child relationship, the Korean Parent-Child Relationships Scale was used. For the measurement of school adjustment, a tool designed to identify the school adjustment of elementary school students was used. The SPSS 21 software and a two-sided test under the significance level of ${\alpha}=0.05$ were used to analyze data. The regression analysis was also used to identify the relative influence of the stress and parent-child relationship on children's adjustment to school. Results: The regression analysis has found the following: the higher peer stress (B=-0.175) and parental strictness (B=-0.159) grow, the lower the level of school adjustment gets; the higher the level of intimacy between parent and child gets, the higher the level of school adjustment grows; and intimacy between parent and child (${\beta}=0.400$) has the largest influence on the child's school adjustment. Conclusions: For elementary school students to be well adjusted to school, their stress and relationships with their parents should be managed. In particular, using the programs that can reduce stress from peers and increase parent-child intimacy will be effective in helping students adjust to school.

• Proceedings of the KSRS Conference
• /
• 2005.10a
• /
• pp.683-686
• /
• 2005

This study addresses a photogrammetric approach to generate Mars topographic products from mapping data of Mars Global Surveyor (MGS). High-resolution stereo images and laser altimetry data collected from the MGS mission are combined and processed to produce Digital Elevation Models (DEM) and orthoimages. First, altimeter data is registered to high resolution images and considerable registration offset (around 325 m) is discovered on high resolution stereo images. Altimetry data, exterior orientation elements of the camera and conjugate points are used for bundle adjustment to solve this mis-registration and detennine the ground coordinates. The mis-registration of altimetry data are effectively eliminated after the bundle adjustment. Using the adjusted exterior orientation the ground coordinates of conjugate points are detennined. A sufficient number of corresponding points collected through image matching and their precise 3-D ground coordinates are used to generate DEM and orthoimages. A posteriori standard deviations of ground points after bundle adjustment indicate the accuracy of OEM generated in this study. This paper addresses the photogrammetric procedure: the registration of altimetry data to stereo pair images, the bundle adjustment and the evaluation, and the generation of OEM and orthoimages.

• Journal of the Korea Convergence Society
• /
• v.9 no.11
• /
• pp.169-177
• /
• 2018

This convergence study was combined research on identifying the effect of health behavior and awareness of Korean wave (Hallyu) on academic adjustment of foreign students living in Korea, and providing support for future foreign students to easily adjust to Korean culture. The subjects for this study are foreign students attending G University and were studied from April 2nd to 30th,2018. The collected data were analyzed using SPSS statistical program. According to the multiple regression analysis which was conducted to analyze the effect of health behavior and awareness of Korean wave on academic adjustment of foreign students, the older and the longer the stay, the poorer the academic adjustment; on the other hand, the higher the frequency of exercise and awareness of Korean wave, the better the academic adjustment. Further, it is necessary to address plans and measures to develop academic adjustment of foreign students by providing health care programs and Korean wave culture programs on sustainable health education and sports.

• Transactions of the Korean Society of Mechanical Engineers
• /
• v.18 no.12
• /
• pp.3149-3158
• /
• 1994

In this paper, using the formulation of dynamic equivalent load considering the effects of moment load and the equation to estimate the cage rotational speed, the new life equation of deep groove ball bearing under radial and moment loads was proposed. Fatigue life test apparatus with the measuring equipment of shaft and cage speed was designed and developed to be capable of subjecting combined radial and moment load. Fatigue life tests were executed by sudden death test method and the reliability of fatigue lives was evaluated by Weibull distribution analysis. From the results of fatigue tests and analysis, the relationships between film parameters and life adjustment factors were acquired. And it was turned out that so as to estimate the effect of moment load on fatigue life, the life adjustment factor as well as the dynamic equivalent load must be taken into account.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.23 no.3
• /
• pp.323-330
• /
• 2005

More than ten years after the era of GPS-Photogrammetry which could provide us only three projection center of all six exterior orientation parameters, direct georeferencing with GPS/INS is now becoming a standard method for image orientation. Its main advantage is to skip or reduce the indirect ground control process. This paper describes the experimental test results of integrated sensor orientation with a commercial GPS/IMU system to approve its performance in determination of exterior orientation. For this purpose two different imaging blocks were planned and the area was photographed at a large photo scale of 1:5,000 and a medium photo scale of 1:20,000. From these data set a variety of meaningful results was acquired, i.e., the accuracy. potential of exterior orientation from direct georeferencing and combined block adjustment using these data considering different photo scales and conditions.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.7 no.2
• /
• pp.35-43
• /
• 1989

The improvements of highly accurate and dense control networks are major requirements to carry out numerical surveying and a large scale mapping for cadastral renovation. In the most conventional photogrammetric solutions, adjusted control coordinates have been applied to block triangulations. However, this study, imploying real data and those of simulated as well, contributes to a simultaneously combined adjustment. It also contains such photogrammetric as photocoordinates and geodetic observations like distances, angles and hight differences. Its purpose is to introduce the improved results, despite it is not sufficient for the ground network. In addition, through the detection of gross error, more precise observational data can be selected for the better adjustment. All in all, the result of this study can be summarized as follows : First, even if the ground control points are not sufficient nor existed at all, the combination of pbotogrammetric and geodetic observations are improved its accuracy. Secondly, the case #2 is more accurate than that of #3, and the case #7 comes into close to that of #6.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.4 no.4
• /
• pp.105-112
• /
• 1984

In horizontal positioning, various methods of adjustment have been studied and developed to improve accuracy. This paper aims to present the best effective adjustment in horizontal positioning. In this study, by observation of lengths and angles, Quadrilaterals and center-point pentagon are formed and analysed with Triangulation, Trilateration and combined method.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2005.05a
• /
• pp.723-729
• /
• 2005

Traditional statistical process control(SPC) applied to discrete part industry in the form of control charts can look for and eliminate assignable causes by process monitoring. On the other hand, engineering process control(EPC) applied to the process industry in the form of feedback control can maintain the process output on the target by continual adjustment of input variable. This study presents controlling and monitoring rules adopted variable sampling interval(VSI) to change sampling intervals in a predetermined fashion on the predicted process levels for integrated EPC and SPC systems. Twelve rules classified by EPC schemes(MMSE, constrained PI, bounded or deadband adjustment policy) and type of sampling interval combined with EWMA chart of SPC are proposed under IMA(1,1) disturbance model and zero-order (responsive) dynamic system. The properties of twelve control rules under three patterns of process change(sudden shift, drift and random shift) are evaluated and discussed through simulation and control rules for integrated VSI EPC and SPC systems are recommended.