• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.41-42
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• 2006

In this paper, we propose a rapid asynchronous UWB (Ultra Wide Band) position location scheme based on double RTTs (Round-Trip Transmissions). In the proposed scheme, to avoid performance degradation of the position location in harsh multipath channel environments where LoS (Line-of-Sight) components are not always guaranteed, the remaining RTT information is solved from realistic double RTTs. Simulation results in IEEE 802.15.4a UWB channel models reveal that the proposed scheme can achieve closely comparable position location accuracy of the conventional ToA (Time of Arrival) method based on triple RTTs, while reducing the processing delay required for the calculation of the position locations.

• The Korean Journal of Physiology
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• v.12 no.1_2
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• pp.35-40
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• 1978

To evaluate orthostatic brain hypoxia from the passive tilt, anesthetized dogs were tilted from supine to $90^{\circ}C$ upright and $90^{\circ}C$ head down position. Blood pH, $Pco_2$ and $Po_2$ changes during tilt were measured on 8 dogs. Respiratory rate was decreased in upright position and increased in head down position comparing to that in rte horizontal position. pH in arterial blood was increased in upright position and decreased in venous blood comparing to that in the horizontal position. No significant changes were found in the head down position. $Pco_2$ of arterial and venous blood was decreased both in upright and head down. position A significant decrease was found in the head down position. $Po_2$ in arterial blood was increased both in the upright and head down position. However, it was decreased in the venous blood. The cause of increased $Po_2$ in arterial blood seemed to do due to hyperventilation and the cause of decreased $Po_2$ in venous blood was thought to be due to increased $O_2$ consumption of animals during the tilt.

• Physical Therapy Korea
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• v.19 no.4
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• pp.38-45
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• 2012

The aim of this study is to compare the effect of abdominal drawing-in maneuver (ADIM) on lower trapezius (LT), serratus anterior (SA), and erector spinae (ES) muscle activity during arm lifts in prone and standing positions. Twenty healthy subjects were recruited, and NoraxonTeleMyo 2400T was used to collect electromyographic signals from the LT, SA, and ES muscles. A two-way repeated analysis of variance (ANOVA) used a significance level of .05. If a significant interaction was found, pairwise comparisons were performed with a Bonferroni adjustment (.05/4=.013). The results of the study were as follows: 1) In LT, no significant ADIM by position interaction was found ($F_{1,19}$=.356, p=.558). There was a significant main effect for ADIM. LT muscle activity with ADIM was significantly greater compared with muscle activity without ADIM ($F_{1,19}$=82.863, p<.001). There was also a significant main effect for position. LT muscle activity in the prone position was greater compared with muscle activity in the standing position ($F_{1,19}$=116.401, p<.001). 2) In SA, significant ADIM by position interaction was found ($F_{1,19}$=8.687, p=.008). There were significant differences in all pairwise comparisons. The greatest SA muscle activity was observed in the standing position with ADIM. 3) In ES, significant ADIM by position interaction was found ($F_{1,19}$=122.473, p<.001). The lowest ES muscle activity was elicited in the standing position with ADIM. Based on these results, ADIM is advocated in the prone position to increase LT muscle activity. In addition, it is concluded that arm lifts in the standing position with ADIM offer the most favorable combination for reducing ES muscle activity and increasing SA muscle activity.

• The korean journal of orthodontics
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• v.37 no.4
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• pp.272-282
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• 2007

The purposes of this study were to evaluate the nasolabial angle changes between closed lip position at centric occlusion and relaxed lip position at which the bite is open so that the lips do not touch and to elucidate the significance of the relaxed lip position for dentofacial diagnosis. Methods: The subjects consisted of 60 (35 Males, 25 Females) skeletal Class III malocclusion adult patients (mean age 23.3 years) with anterior crossbite. Results: In Class III malocclusion adult patients, there were significant differences in the nasolabial angle changes between closed lip position and relaxed lip position. Using the cluster analysis, the subjects were divided into three groups according to the pattern of nasolabial angle change: Group 1 (N = 27, 45%, $-8\;{\sim}\;1$), Group 2 (N = 30, 50%, $2^{\circ}\;{\sim}\;17$), and Group 3 (N = 3, 5%, over 18). Conclusion: The results showed that the pattern of the nasolabial angle change between closed lip position and relaxed lip position varies in skeletal Class III malocclusion patients. Thus, relaxed lip position should be taken into account when diagnostic records are obtained and analyzed to accurately to evaluate the facial soft tissues and predict facial esthetics after surgical-orthodontic treatment.

• The Journal of Korean Academic Society of Nursing Education
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• v.9 no.1
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• pp.30-40
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• 2003

This study was conducted to identify the ethical values of clinical nurses. 119 nurses working in clinical setting were selected Gwangju city and Chunnam area. Data were gathered from April. 1 to June. 27, 2001 by structured questionares. Analysis of data was done by SPSS using percentage, t-test, one-way ANOVA, pearson's correlation. The results obtained from data were as follows : 1. The ethical values of human life area slightly took up the position of utilitarian. In human life area mean score was 2.41. This area showed remarkerble individual differences between utilitarian and deontological position. 2. The ethical values of clients area took up the position of utilitarian position. In clients area mean score was 1.75. 3. The ethical values of nursing practice area took up deontological position. In nursing practice area mean score was 2.58. 4. The ethical values of nurses-co-worker area took up deontological position. In nurses- co-worker area mean score was 2.94. 5. Those who have younger, higher education level, less job experience, singles, religion, lower position, positive attitude of nursing and firm ethical standard took up more deontological position than those who have not. 6. There were significant relationship between human life area & client area(r=.566 p=.000), nursing practice area(r=.698 p=.000). There were significant relationship between client area & nursing practice area(r=.342 p=.001). There were significant relationship between nursing practice area & nurses-co-worker area(r=.491 p=.001).

• Journal of the Korea Fashion and Costume Design Association
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• v.15 no.4
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• pp.101-112
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• 2013

The purpose of this study was to evaluate the differences of the visual image on the variations in the waist position and the width of the wide pants. The stimuli were 9 samples: 3 variations of the waist position and 3 variations of the width of hem line. The data was obtained from 56 fashion students and analyzed by using Factor Analysis, Anova, Scheffe's Test and the MCA method. The results of this study are as follows; 1. The visual evaluation by the waist position and the width of the wide pants is composed of 4 factors: attractiveness, physical characteristics, modesty, and personality. Among these factors, the attractiveness was the most important. 2. The high waist pants showed the most characteristic and soft under the condition that the width of the hem line was 98cm at the third stage, while the natural waist pants showed no characteristics and stiff in case the width of the hem line was 66cm at the first stage. 3. The first stage pants were simplest and modest in case the waist position was low, while the third stage pants were the most complicated and untidiest in case the waist position was natural. 4. The waist position and the width of the wide pants interacted with the physical characteristics and the modesty. 5. According to the MCA on the attractiveness and the personality, the width affected to the visual image of the wide pants than the waist position did.

• Progress in Medical Physics
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• v.28 no.2
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• pp.39-44
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• 2017

This study aims to analyze dose distribution and treatment time of endobronchial brachytherapy (EBBT) by changing the position step size of the dwell position. A solid water phantom and an intraluminal catheter were used in the treatment plan. The treatment plans were generated for 3, 5, 7, and 10 cm treatment lengths, respectively. For each treatment length, the source position step sizes were set as 2.5, 5, and 10 mm. Three reference points were set 1 cm away from the central axis of the catheter, along the axis, for uniform dose distribution. Volumetric dose distribution was calculated to evaluate the dosimetric effect. The total radiation delivery time and total dwell time were estimated for treatment efficiency, which were increased with position step sizes. At half-life time, the differences between the position step sizes in the total radiation delivery time were 18.1, 15.4, 18.0, and 24.0 s for 3, 5, 7, and 10 cm treatment lengths, respectively. The dose distributions were more homogenous by increasing the position step sizes. The dose difference of the reference point was less than 10%. In brachytherapy, this difference can be negligible. For EBBT, the treatment time is the key factor while considering the patient status. To reduce the total treatment time, EBBT can be performed with 2.5 mm position step size.

• The Journal of Korean Physical Therapy
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• v.32 no.1
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• pp.58-63
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• 2020

Purpose: This study examined the effects of the right or left knee lift during push up plus in the quadruped position on the serratus anterior (SA) muscle activity. Methods: Twenty-one subjects (male 11, female 10) performed the quadruped position on push up plus. The muscle activities of the lower trapezius (LT), SA, and upper trapezius (UT) were measured by surface electromyography. Repeated measurements of one-way ANOVA were performed for statistical analysis of the data, and the criterion for statistical significance was set to p<0.05 and comparative analysis of the UT and SA ratio using a Paired t-test. Results: The right SA increased the muscle activity of the right knee lift during quadruped position push up plus (p<0.05). In particular, the right SA muscle activity was higher than the left. In addition, comparative analysis of the UT and SA ratio to the right knee lift during quadruped position push up plus was performed (p<0.05). The right was found to be a significant statistic compared to the left, but the left SA increased the muscle activity of the left knee lift during quadruped position push up plus (p<0.05). The left SA muscle activity was higher than right. In addition, comparative analysis of UT and SA ratio to the left knee lift during quadruped position push up plus was performed (p<0.05). The left was found to be a significance statistic than the right. In addition, the interaction effect between the groups showed significant differences (p<0.05). Conclusion: Knee lift during push up plus is recommended for the selective activation of a research exercise protocol of one side of the serratus anterior.

• Journal of Astronomy and Space Sciences
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• v.29 no.4
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• pp.351-362
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• 2012

We made a study on real-time determination method for relative position using the laser-measured distance data between satellites. We numerically performed the determination of relative position in accordance with extended Kalman filter algorithm using the vectors obtained through nonlinear equation of relative motion, laser simulator for distance measurement, and attitude determination of chief satellite. Because the spherical parameters of relative distance and direction are used, there occur some changes in precision depending on changes in relative distance when determining the relative position. As a result of simulation, it was possible to determine the relative position with several millimeter-level errors at a distance of 10 km, and sub-millimeter level errors at a distance of 1 km. In addition, we performed the determination of relative position assuming the case that global positioning system data was not received for long hours to see the impact of determination of chief satellite orbit on the determination of relative position. The determination of precise relative position at a long distance carried out in this study can be used for scientific mission using the satellite formation flying.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.691-699
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• 2018

Astronomical positioning has been carried out from the past by using Sextant. The St. Hilaire method was mainly used by Nautical Almanac and Sight Reduction Tables For Marine Navigation. In modern times, it has been able to use the LOP(Line of Position) method smoothly by combining with IT technology. However, in comparison with the past method, the LOP method always shows two positions, True Position and False Position, which must be distinguished by the navigator. Therefore, in this paper, we proposed a method of using the azimuth to remove the false position generated by the LOP method. In particular, the theoretical considerations using azimuth are presented in various ways, and the validity of the theoretical considerations is confirmed. Simulations are presented to confirm that the theoretical basis of the thesis is valid.