• Journal of the Korean Dietetic Association
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• v.2 no.1
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• pp.49-61
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• 1996

For the purpose of disclosing the relationship between job characteristics and satisfaction and organizational commitment for foodservice employees, questionnaire survey was carried out on 427 subjects of 14 general hospitals in Seoul, Korea. Questionnaire items consisted of general characteristics, organizational commitment, job satisfaction and characteristics. Data were analyzed by ANOVA, Duncan's multiple range test and Pearson correlation using SPSS PC package. The results were as follows 1. Mean score of value commitment and commitment to stay were 3.57 and 3.67. 2. There were significant differences between value commitment and age, marital status department, period and management, and between commitment to stay and experience and management. 3. Mean score of job satisfaction was the highest in co-workers(3.37) and work itself (3.37) and followed by in supervision(3.25), wage(2.43) and promotion(2.01). There were significant differences between job satisfaction for work itself and age, educational status and job department and management, between job satisfaction for wage and position, department, period and management, between job satisfaction for supervision and age, educational status and department, between job satisfaction for promotion and age, marital status, position, period, and management, between job satisfaction for co-workers and sex and educational status. 4. Mean score of job characteristics was the highest in dealing with others(4.13) and followed by in feedback(3.51), autonomy(3.29), task identify(3.07), variety(2.71) and friendship(2.47). 5. Job satisfaction for work itself, supervision and co-workers were significantly increased with increasing value commitment. Job satisfaction for work itself, supervision were significantly increased with increasing commitment to stay. Job satisfaction for promotion had negative correlation with organizational commitment in all job position. 6. Value commitment had significantly positive correlations with variety, autonomy, identity, feedback and dealing with others, and significantly negative correlation with friendship. Commitment to stay had significantly positive correlations with dealing with others, and significantly negative correlations with friendship. In all job position organizational commitment had significantly negative correlations with friendship.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.170-170
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• 2000

This paper deals with on-Line detection of strip movement and real time positioning of brackets of EMD connected with it. Strip movement is detected by 4 line CCD camera and measured position correction value is inputted to motor position controller to control position of brackets.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.10a
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• pp.493-498
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• 1993

This paper proposes a high precision measurement technique to obtain the height of gage block. The proposed technique is consisted of two steps : In the first step, laser position transducer and electric micrometer are adopted to obtain a coarse value of the height of gage block, and then, second, heterodyne laser interferometry is adopted to acquire the precision value. The experiment results show that accuract in the order of a few nanometer is achieved for the gage blacks of as high as a few millimeter.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1858-1862
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• 2005

Stepping motor normally operates without feedback and may loss the synchronization. This problem can be prevented by using positional feedback. This paper introduces one method for closed loop control of stepping motor and a method for combining full-step control and micro-step control. This combination controlling apparatus can perform position control with high accuracy in a high speed, so that it will not suffer from vibration (or hunting) problem when stopping motor. Controlling apparatus contains a position counter block for detecting rotor position of stepping motor, a driving block for supplying current to windings of stepping motor, a control block for comparing output signal of position counter block with command position (desired position) and outputting current command signal based on deviation between current position and command position of rotor. To output current command signal, the control block refers to a sine wave data table. This table contains value of duty cycle of Pulse Width Modulation signal. As the second object of this paper, the process of building this data table is also presented.

• The Journal of Korean Academy of Prosthodontics
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• v.30 no.1
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• pp.125-132
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• 1992

The purpose of this study was to evaluate the effect of the metal coping design on the fracture resistance of ceramometal crown. The Ni-Cr alloy(Supranium, Krupp Co., German) and Vaccm-fired porcelain powder(Vita VMK 689, Vita Co., Germany) were used in this study. The measurement of fracture resisitance of ceramometal crown was done with Instron Universial Testing Machine(Instro Co., Model no.4201). The obained results were as fellows : 1. The fracture resistance measured at the buccal cusp tip was the highest value in the group that those position of ceramometal junction was 2mm superior to the lingual finshing margin(100.25Kg) and the fracture resistance revealed on order of the group that those position was 2mm buccal to the central groove(51.64Kg). 2. The fracture resistance measured at the central groove was higher value in the group that those position was 2mm lingual to the central groove than in the group that those position was 2mm lingual to the central groove than in the group that those position was 2mm superior to lingual finishing margin(132.48Kg). 3. In all cases, the fracture resistance at the central groove was higher than that at the buccal cusp tip.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.17 no.1
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• pp.19-28
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• 1981

Accuracy of the position fix obtained by navigation with Omega in the capacity of worldwide navigation depends on the predicted propagation correction. The authors observe continuously the phase differences of the A-C pair and the A-E pair from April 17 to October 14, 1980, at Busan(35\ulcorner07'. 9N, 129\ulcorner06'. 3E), and analyze the characteristic of daily variation the relation between the theoretical PPC and the measu red PPC to study the accuracy of the position fix. The results are as follows: 1. The results of fourier's analysis for the theoretical PPC and the measured PPC are positive correlation in the coefficients ao, a2, a3 with A-C pair and in the coefficients aO-a3 with A-E pair, and those PPC are apparent to daily periodicity during all measured time. The initial phase is around to 280\ulcorner with A-C pair and 1800 with A-E pair. 2. Daily variatons of the phase difference tend to decrease and the time width to narrow from April toward July, but these variations are opposed to those from July toward October. 3. Mean value of total errors of the position fix by theoretical PPC is 2.67 miles and its standard deviationis O.90miles. 4. Mean value of total errors of the position fix by the measured PPC is 0.63 miles and its standard deviation is 0.217 miles.

• The Korean Journal of Emergency Medical Services
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• v.14 no.1
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• pp.5-18
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• 2010

Objective : This study compares Video laryngoscope and Direct laryngoscope in tracheal Intubation on rapidity and accuracy by paramedic and aims to improve efficiency of airway management and survival rate in pre-hospital treatment for the patients with severe trauma, cardiac arrest or dyspnea caused by acute diseases. Methods : 60 paramedics were recruited from 13 fire stations located in C province. With the consent of the paramedics, likelihood ratio test was carried out and they were divided into two different groups; DL group (30) and GVL group (30). Regarding intubation conditions, difficult airway grade I, grade II and grade III as well as sniffing position and neutral position were examined. This study also compared between ambulance in motion and in stand still. Frequency, average and standard deviation were analyzed with statistics program, SPSS WIN 17.0 and repeated measure design was introduced to examine inter-relations between position, grade and groups. Results : Intubation was performed more rapidly in neutral position and GVL than in sniffing position and DL(F = 15.260, p = .000). Rapidity value was better with grade I and grade II than grade III and better with GVL than DL(F = 32.629, p = .000). Accuracy value was higher with neutral position and GVL than sniffing position and DL(F = 5.008, p = .011). grade III was less accurate than grade I, grade II and GVL was more accurate than DL(F = 10.966, p = .000). Ambulance motion status did not show any statistically significant differences in accuracy and rapidity. Conclusion : Given this study results, neutral position is better for the patient with severe trauma. For a better survival, GVL intubation can be considered since GVL can enhance accuracy as well as rapidity regarding difficult airway. Since there is no significant differences in ambulance motion factors, intubation can be recommended even in moving ambulance for shortening traveling time to a hospital.

• The Journal of the Acoustical Society of Korea
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• v.26 no.1
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• pp.48-54
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• 2007

In this paper we have implemented a 3-D PL (Position Location) system to estimate the 3-dimensional position of a moving object in underwater environments. In this research, we let four sensors fixed in different Positions and moving sensorsto communicate with each other to find the 3-dementianal positions for both the fixed and moving objects. Using this we were also able to control the moving object remotely. When finding the position, we calculated the norm of the Jacobian matrix every iteration in the Newton algorithm. Also by using a different initial value for calculating the solution when the norm became higher than the critical value and the solution from the inverse matrix became unstable, we could find a more reliable position for the moving object. The proposed algorithm was used in implementing a DSP system capable of real-time position location. To verify the performance, experiments were done in a water tank. As a result we could see that our system could located the position of an object every 2 seconds with a error range of 5cm.

• Journal of Korean Society for Quality Management
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• v.38 no.1
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• pp.10-19
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• 2010

The competitive strategies of the Korean manufacturing companies have changed from the "cost leadership" strategy in the early developing stage since 1960's to the "stuck in the middle" position since 1990's in the face of emerging new cost leaders as the Chinese companies. The data on the strategic contents of the Korean manufacturing companies show that their strategies are seeking the value innovation through not only quality improvement but also cost reduction altogether rather than selecting one on the trade-off relation between the both competitive dimensions. Their strategic actions seem to be seeking the operational efficiencies through all the value chain activities rather than the strategic effectiveness by selecting and focusing on the specific competitive dimension, which is considered as a typical strategic approach. Their strategy seems to be non-strategic in the general sense. But their non-strategically looking behaviors can be reasonable enough for their sandwiched competitive position between the global quality leaders and following cost leaders. This paper explains why their strategies can be right through the theoretical explanations by using the quality-price elasticity approaches for the consumer behaviors. We can call their strategic activities as the value innovation strategy.

• Archives of Plastic Surgery
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• v.45 no.5
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• pp.425-431
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• 2018

Background The umbilicus makes an important contribution to the natural appearance of the abdomen. To date, studies on its position in Korean women are lacking, and no standards have been established. The purpose of this study was to investigate the position of umbilicus in Korean women and to review changes in its position after ipsilateral pedicled rectus abdominis musculocutaneous (IP-RAM) flap. Methods This research consisted of two studies. In first study, 100 females who visited the emergency department with gastroenteritis between 2007 and 2011 were included. In second study, 40 women who underwent IP-RAM flap in the same period were included. Using abdominal computed tomography, we measured the distance between xiphoid process and umbilicus, represented by value a, and the distance between umbilicus and symphysis pubis, represented by value b. Thus, the location of the umbilicus was represented by the ratio a/b. The data were analyzed using Pearson correlation test and paired t-test. Results In study 1, the mean value of a/b was 1.07. Pearson correlation test revealed a significant correlation between age and a/b. In study 2, the mean value of a/b was 1.16 in preoperative measurements and 1.01 in postoperative measurements. The paired t-test showed a significant difference between preoperative and postoperative measurements, indicating cephalic migration of the umbilicus after surgery. Conclusions The natural position of the umbilicus showed caudal migration with aging. Additionally, in a comparison of preoperative and postoperative measurements in patients who underwent IP-RAM flap, cephalic migration of the umbilicus was observed after surgery.