• Proceedings of the KIEE Conference
• /
• 2004.11a
• /
• pp.197-199
• /
• 2004

In this paper, we studied a accuracy for CT using elastic epoxy. According to industry development, the quality where also the electric material is various is demanded. Insulation material is widely used because epoxy is superior to electrical and mechanical property. Until now, the possibility where the crack will occur is high because epoxy used to electrical products had high hardness. If thermal expansion is different of two material, contraction of epoxy heavily transformed turns ratio of CT. Elastic epoxy absorbed in expansion and contraction of substance material by temperature. So we could design more exacted CT. We had elastic test of elastic epoxy and made CT using elastic epoxy. At the result, We obtained turns ratio of within 4% superior to existing CT.

• Proceedings of the KIEE Conference
• /
• 2005.07b
• /
• pp.1141-1143
• /
• 2005

This paper presents the reasonable design parameters of a SRM for hybrid electric vehicle driving. For the design of SRM, the initial model is designed using the equivalent magnetic circuit method. In order to optimize the SRM for HEV. The initial model is redesigned by FEM with the variation of the stock length and turns of winding. This paper shows that a flat-topped current of a phase can be made from a change of the stack length and the number of turns for high efficiency, high average torque and a lower torque ripple. The change of current falling time as a variation of turn-off angle was shown by FEA. The iron loss and copper loss were described. The torque of the redesigned motor is suitable for low and high speed ranges to drive a HEV that was verified by the speed-torque curve.

• International Journal of Highway Engineering
• /
• v.17 no.4
• /
• pp.89-98
• /
• 2015

PURPOSES : This study evaluated the feasibility of implementing protected-permissive left-turn (PPLT) signals at three-leg signalized intersections. METHODS: A three-leg signalized intersection with permissive left-turn was first selected. A VISSIM simulation model was constructed using data collected from the test site. The VISSIM network was calibrated by adjusting related parameter values in order to minimize the difference between the simulated and surveyed critical gap. The calibrated network was validated by the number of waiting left-turning vehicles per cycle. Finally, the mobility and safety measures were extracted from simulation runs in which permissive, protected left turns as well as PPLTs were realized based on diverse traffic volume scenarios. RESULTS : The mobility-related measures of effectiveness (MOEs) of the case with PPLT outperformed the other two left-turn treatment scenarios. In particular, the average waiting time per cycle for the left-turn vehicles in the case with PPLT was reduced by 30 s. The safety-related MOEs of the case with PPLT were somewhat higher than those in the case with protected left-turns and much higher than those in the case with permissive left-turns. CONCLUSIONS : Based on the mobility- and safety-related MOEs generated from the VISSIM simulation runs, the use of PPLT seems to be feasible at three-leg signalized intersections where the left-turn is permissive and a pedestrian signal exists at the conflicting approach. However, in order to use the PPLT in earnest, it is necessary to revise the road traffic act, traffic signs, and related manuals.

• Journal of Acupuncture Research
• /
• v.24 no.3
• /
• pp.29-38
• /
• 2007

Objectives : The purpose of this study was to investigate the effects of $Taegye(KI_3)$ acupuncture and acupuncture with twirling method on the blood pressure, cardiomegalic index, plasma levels of renin and atrial natriuretic peptide in hypertensive RAT induced by two kidney one clip (2KIC). Methods : This study was conducted on one control group and four experimental groups. Control group that had no treatment, Tail group that took tail acupuncture, K-0 group that took $KI_3$ acupuncture, K-6 group that took $KI_3$ acupuncture with 6 turns of twirling method, K-9 group that took $KI_3$ acupuncture with 9 turns of twirling method. Results : Blood pressure was decreased significantly after $KI_3$ acupuncture. Cardiomegalic index decreased significantly after $KI_3$ acupuncture. Plasma levels of renin was decreased significantly after $KI_3$ acupuncture and acupuncture with 9 turns of twirling method Ⅳ. Plasma levels of atrial natriuretic peptide was increased significantly after $KI_3$ acupuncture. Conclusions : These results suggest that blood pressure was decreased significantly after $KI_3$ acupuncture in hypertensive RAT induced by two kidney one clip (2K1C).

• Smart Structures and Systems
• /
• v.18 no.4
• /
• pp.643-662
• /
• 2016

The monitoring of structural integrity of pipeline tapered thread connections is of great significance in terms of safe operation in the industry. In order to detect effectively the loosening degree of tapered thread connection, an active sensing method using piezoceramic transducers was developed based on time reversal technique in this paper. As the piezoeramic transducers can be either as actuators or sensors to generate or detect stress waves, the energy transmission for tapered thread connection was analyzed. Subsequently, the detection principle for tapered thread connection based on time reversal was introduced. Finally, the inherent relationship between the contact area and tightness degree of tapered thread connection for the pipe structural model was investigated. Seven different contact area scenarios were tested. Each scenario was created by loosening connectors ranging from 3 turns to 4.5 turns in the right tapered threads when the contact area in the left tapered threads were 4.5 turns. The experiments were separately conducted with a highly noisy environment and various excitation signal amplitudes. The results show the focused peaks based on time reversal have the monotonously rising trend with the increase of the contact areas of tapered threads within an acceptable monitoring resolution for metal pipes. Compared with the energy method, the proposed time reversal based method to monitor tapered threads loosening demonstrates to be more robust in rejecting noise in Structural Health Monitoring (SHM) applications.

• Korean Journal of Applied Biomechanics
• /
• v.23 no.4
• /
• pp.403-407
• /
• 2013

Fouett$\acute{e}$ turns are repeated pirouettes which begin as a normal pirouette en dehors but include a movement that allows the rotational momentum lost to friction to be regained once each revolution. The purpose of this study was to investigate on orientation density of head/trunk to the front with and without music to which dancers perform the Fouette turn in time. 10 female dancers($21.0{\pm}1.4$ years old, height; $165.3{\pm}3.9$ cm, weight: $50.5{\pm}5.7$ kg) who are the students of S University participated in this study. It took shorter time to perform one revolution of fouette turn with music (930 ms) than without music (961 ms), which reason may be the shorter time of phase 2 in which the rotational momentum is not produced but lost to fiction. Orientation density of trunk to the front was smaller with music (.176) than without music (.196), while the one of head had not significant difference between with and without music. And the path length of marker on $2^{nd}$ left metatarsal bone during one revolution was smaller with music (35.7 cm) than without music (40.2 cm) but the difference was not statistically significant (p=.267).

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.24 no.2
• /
• pp.166-171
• /
• 2011

We use the electrical energy and it is essential energy in modern life, but we lay cable underground due to the issue for environment and safety. Safety for worker is still insufficient for the development of safety equipment and related research has been focused on the cable lifetime diagnosis at underground cable work. I have to develop live line detector around the magnetic field were investigated at underground cable. In this paper, we were investigated by variation of coil turns and load due to detection of magnetic field at lines around. And detected value of developing products compared with measured value of milli-gauss meter. As a result, the value of the number of coil turns was found to be proportional to the measured value. But turn-numbers increase showed that the weak noise. I could be confirmed that sensor showed the optimum value from 4,000 to 5,0000.

• Journal of The Korean Association For Science Education
• /
• v.21 no.2
• /
• pp.279-288
• /
• 2001

In this study, interaction patterns in peer small-group discussions with cognitive conflict strategy (CCS) and those with social consensus strategy (SCS) were compared. Verbal interactions of four small groups (16 students) in learning science concepts were analyzed at the levels of turns, interaction units, and episodes. The frequencies of total turns and knowledge construction turns per discussion for the SCS group were higher than those for the CCS group. Comparing and evaluating hypotheses and discussion worksheets provided were especially effective in increasing metacognitive utterances of the SCS group students. The frequencies of 'most students participating mode', 'elaborative interaction mode', and 'exploratory episode' for the SCS group were higher than those for the CCS group. These suggested that more students in the SCS group participated in small-group discussions and their discussions were more interactive and elaborative. The interactions and episodes of the SCS group were also superior in quality to those of the CCS group.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.23 no.9
• /
• pp.1146-1151
• /
• 2019

Histogram H is an x-monotone rectilinear polygon with a horizontal edge, called by a base, connecting the leftmost vertical edge and the rightmost vertical edge. Here the rectilinear polygon is a polygon with only horizontal and vertical edges and the x- monotone polygon P is a polygon in which every line orthogonal to the x-axis intersects P at most twice. Walking counterclockwise on the boundary of a histogram H yields a sequence of left turns and right turns at its vertices. Conversely, a given sequence of the turns at the vertices can be realized by a histogram. In this paper, we consider the problem of finding a histogram to realize a given turn sequence. Particularly, we will find the histograms to minimize its area and its bounding box. It will be shown that both of the problems can be solved by linear time algorithms.

• Journal of Korean Philosophical Society
• /
• v.117
• /
• pp.35-55
• /
• 2011

This article purports to clarify the doctrinal characteristics of the $Yog{\bar{a}}c{\bar{a}}ra$ school's hermeneutic interpretations of the "theory of the three turns of the Dharma Cakra" in the Saṃdbinirmocana-sūtra through early Indian $Yog{\bar{a}}c{\bar{a}}ra$ treatises such as the $Yog{\bar{a}}c{\bar{a}}rabb{\bar{u}}mi-vy{\bar{a}}kby{\bar{a}}$ and the. $Vy{\bar{a}}khy{\bar{a}}yukti$. It will probe how these interpretations apply co the theory of two truths or that of three natures($trisvabh{\bar{a}}va$) among the main doctrines of the $Yog{\bar{a}}c{\bar{a}}ra$ school. Especially, the peculiar characteristic of the "theory of the three turns of the Dharma Cakra" is such chat the thought of ${\acute{s}}{\bar{u}}nyat{\bar{a}}$ in the lineage of $Praj{\bar{n}}{\bar{a}}p{\bar{a}}ramita-s{\bar{u}}tras$ is regarded as incomplete, as the early school of Madhyamaka represented by $N{\bar{a}}g{\bar{a}}rjuna$ is conceived of as belonging to the second period of turn. Speaking of the further details of the "theory of the three turns of the Dharma Cakra", the $Yog{\bar{a}}c{\bar{a}}ra$ school subdivides the realm of saṃvṛti satya in $N{\bar{a}}g{\bar{a}}rjuna^{\prime}s$ theory of two truths; that is, it divides the saṃvṛti into merely linguistic existence and actual existence, and the thus-created structure of the theory of three natures on the basis of ocher-dependent nature(paratantra-$svabh{\bar{a}}va$) makes it possible to establish the doctrinal system of the thought of ${\acute{s}}{\bar{u}}nyat{\bar{a}}$ that is not subject to "nihilism or ${\acute{s}}{\bar{u}}nyat{\bar{a}}$ attached to evil." In effect, the above hermeneutic interpretation of the "theory of the three turns of the Dharma Cakra" is inherited into the structure of the $abh{\bar{u}}taparikalpa$ in the $Madhy{\bar{a}}nta-vibh{\bar{a}}ga$ so that, as seen in the commentary of Sthiramati, it is ascertained to apply to later doctrines through its secure establishment. To summarize its characteristics succinctly, firstly the $abh{\bar{u}}taparikalpa$ newly established as a saṃvṛti-satya is set up as the other-dependent nature, which is seen to have been set up particularly in order to sublate both the $Sarv{\bar{a}}stiv{\bar{a}}da^{\prime}s$ realist "view of being" and the Madhyamaka's "view of ${\acute{s}}{\bar{u}}nyat{\bar{a}}$" that impairs the ocher-dependent nature as a samvṛti-satya. In other words, according to the five kinds of views suggested in Sthiramati's commentary, the three natures are seen to be presented as the fundamental truth in order to unify all the doctrinal systems available ever since the beginning of Buddhism. Then, the theory of three natures is established principally on the basis of the $abh{\bar{u}}taparikalpa$, while the two truths of the $Yog{\bar{a}}c{\bar{a}}ra$ school are clearly ascertained to have been embedded in the structure of the $abh{\bar{u}}taparikalpa$. In fact, this might be understood to reflect the unique ontological view of reality or truth in the $Yog{\bar{a}}c{\bar{a}}ra$ School.