• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.1479-1480
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• 2011

• 방송공학회논문지
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• 제24권7호
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• pp.1259-1265
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• 2019

Maintaining timing relationships among packets in a single media stream or between packets from different media streams is an essential criterion in MMT system. It is the function of the synchronization and de-jittering algorithms to re-adjust timing relationship between the MMT packets to assure synchronized playback. Thus, delivery of time constrained MPEG media on time, according to their temporal requirements, is an important goal of MMT. For this purpose MMT needs to specify syntax and semantics of a timing model to be used by the delivery functions. In this paper, we propose a proper timestamp-related header format for MMT delivery timing model to support media synchronization in various delivery scenarios including hybrid delivery.

• Journal of Acupuncture Research
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• 제20권5호
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• pp.82-92
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• 2003

Objective: To appreciate the effect of San-Yin-Jiao(SP-6) pressure on duratof delivery time and quantity of blood loss in order to verify the possibility of application to clinic of San-Yin-Jiao pressure. Methods: The design of this study is nonequivalent control group non- synchronized design. The subjects are 39 persons who are made up of SP-6 pressure applied(experimental) group 20 persons and to control group 19 persons. Collected data were analyzed as frequency, percentage, t-test, $x^2-test$ using SPSS 10.0 WIN Program. Conclusions: San-Yin-Jiao(SP-6) pressure not only make short duration of delivery time, but also decline quantity of blood loss in effect. 1. It could be necessary that the study of the effects of San-Yin-Jio(SP-6) pressure on duration of delivery time and quantity of blood loss for primipara be done repeatedly. 2. It could be necessary to increase this sort of study through free random experimental design in order to generalize this experimental result.

• 대한안전경영과학회지
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• 제14권4호
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• pp.259-264
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• 2012

Automobile market was grown up by 1.7% at the first half of 2012 comparison with 2011 in China and this growth trend will be continued for a while. Under this market environment the China automobile companies expand the production capacity and result in heightening the intense competition for companies. This paper deals with the more efficient production line and production logistics through SPS(Synchronized Production System) with construction of MES(Manufacturing Execution System) in H automobile company in China. In plastic painting line we can simultaneously prepare the production quantity and delivery time according to assembly production plan by introducing MES. We can reduce the excess production and result in extreme reduction of inventory.

• 한국수정란이식학회지
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• 제23권3호
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• pp.177-181
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• 2008

This study was performed to investigate the effects of hCG treatment on pregnancy and delivery rates in the Hanwoo recipients. There were significantly higher pregnancy and delivery rates in the recipients treated with hCG at 7 days after artificial insemination (p<0.05), respectively. The SCNT embryos from bovine fetal fibroblast cells were transferred into the synchronized recipients. The recipients were administered saline (n=89) or hCG (1,500 IU) (n=48) at 7 days after heat, respectively. The pregnancy rate was significantly higher in the recipients treated with hCG compared to that of saline treated group (p<0.01), however, the delivery rate was not different in both treated groups. The concentration of plasma progesterone (P4) was not different in both groups before hCG treatment, but the P4 level was increased significantly in hCG treated group after hCG injection (p<0.05). Although the pregnancy rate was very high in early stage of pregnancy, it was decreased dramatically after 50 days of pregnancy and maintained basal level. Taken together, the treatment of hCG in the SCNT recipients after day 7 of heat was effective method to increase the P4 concentration and to increase the pregnancy rate. But it did not affect directly to delivery.

• 컴퓨터교육학회논문지
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• 제6권4호
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• pp.71-83
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• 2003

이 연구는 다양한 개발 방법을 통해 효과적인 사이버 교육 프로그램을 찾는 것을 주목적으로 한다. '다양한 방법'의 접근은 어떤 전달 기술 (Delivery Technology)에 의해서 사이버 교육이 이루어 지고 있는가에 따라서 분류되었다. 제 1 세대에서 사용한 기술로써는 문자, Flash 그리고 애니메이션 이며, 제 2 세대와 제 3 세대에서는 동영상 비디오와 오디오 등 멀티미디어 기술을 사용하였으나 다만 비디오 클립에서 강의 되는 학습전달방법이 다르다. 평가결과 3 세대 기술을 이용한 방법이 가장 효과적인 학습 전달 기술로 평가되고 있다. 그러나 여기에서 사용한 멀티미디어를 이용한 학습 전달 방법은 개발에 드는 많은 비용 뿐만이 아니라 학습자에게도 네트워크의 전송속도가 빠른 최신의 컴퓨터를 필요로 한다. 그러므로 사이버 교육을 위한 멀티미디어를 이용한 프로그램 개발과 아울러 전송 속도 등과 같은 기술적인 개발도 이루어져야 한다고 생각한다.

• 제어로봇시스템학회논문지
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• 제16권4호
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• pp.403-410
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• 2010

The switched Ethernet has many features for real-time communications such as providing traffic isolation, large bandwidth, and full-duplex links, and so on. The switched Ethernet, however, cannot guarantee the timely delivery of a real-time message because message delay increases when collisions occurs at the output ports and message loss can even occur due to the overflow at the output buffer. Recently, many research efforts have been done to use the switched Ethernet as an industrial control network. In the industrial control network, sensors periodically sense the physical environment and transmit the sensed data to an actuator, and the periodic messages from sensors to actuators have typically real-time requirements such that those messages must be transmitted within their deadlines. This paper first suggests a feasible condition for EDF (Earliest Deadline First)-based scheduling of periodic messages on a synchronized switched Ethernet and a message scheduling algorithm which satisfies the proposed feasible condition. Pedreiras, et al. [10] suggested a feasible condition for message scheduling on the Ethernet (shared media Ethernet), but there has been no research result on the scheduling condition on the switched Ethernet until now. We compared the real-time message scheduling capacity between the Ethernet and the switched Ethernet by simulation. The simulation result shows that the message scheduling capacity of the Ethernet has almost remained constant as the number of nodes on the network increases, but, in the case of the switched Ethernet, the message scheduling capacity has increased linearly according to the number of nodes on the network.

• 여성건강간호학회지
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• 제4권3호
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• pp.322-331
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• 1998

The postpartum is a period of transition to motherhood where a childless woman transforms into a woman with children. Parents, especially mothers must perform an essential role of implementing instrumental and emotional care behaviors on part of the helpless, dependent, and immature infant. First-time mothers, however, suddenly face the responsibility of round the clock duty without neither parenting training during pregnancy, nor a time to gradually adapt to growing responsibilities after birth, with confusion and frustration as a result. Thus, after providing first-time mothers with childcare education as maternal role preparation, this study will try to examine its effects on childcare behaviors and confidence in maternal role during the early postpartum period. This quasi-experimental study using a nonequivalent control group non-synchronized design, was carried out from March 1995 to May 1996 to verify the effects of a childcare education program with first-time mothers who had vaginal delivery in Ewha University Hospital, Seoul, Korea, and collected data from 60 subjects who consented to the study. The education was given in the early postpartum period(48-72 hours after delivery) and to measure its effects, a posttest was done 4 weeks later with the results analyzed by SPSS shown in the following : 1. The childcare behavior score of the experimental group that had received the newborn care education was higher than the control group(t=3.5, P=.001). 2. The control group and the experimental group which had received the education showed no difference in degree of confidence in maternal role. 3. The higher the childcare behavior score, the higher the degree of confidence in maternal role was among the subjects(r=.56, P=.001). The preceding results are significant in that childcare practices can be promoted by providing child-care education to first-time mothers in the early postpartum period. Thus, this education can be used as a nursing intervention strategy in the early postpartum period.

• 여성건강간호학회지
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• 제7권3호
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• pp.331-347
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• 2001

The purpose of this study was to compare the effects on labor pain and duration of delivery time for primipara women treated by Hob-Gog (LI-4) pressure. 1. The proposed hypothesis was that 'the score of labor pain could be lower in the group which had LI-4 pressure applied than in the control group'. 1-1. The sub hypothesis was that the score of subjective labor pain would be lower in the group which had LI-4 pressure applied than in the group which did not have LI-4 pressure applied. 1-2. Another sub hypothesis was that the score of objective labor pain would be lower in the group which had LI-4 pressure applied than in the group which did not have LI-4 pressure applied. 2. The proposed hypothesis was that 'the score of duration of delivery time could be shorter in the group which had LI-4 pressure applied than in the control group'. The design of this study was a nonequivalent control group non-synchronized post test only design to verify the effect on labor pain for primipara women treated by LI-4 pressure and to evaluate the benefits of using LI-4 pressure on some women and judging the degree of their labor pains in comparison with other primipara women not treated with LI-4 pressure. The subjects included 63 primipara women who underwent vaginal delivery, who were between 38-41 weeks intra uterine pregnancy; who did not have any complications; and who were under pitocin augmentation or induction. They were recruited with informed consent; 34 were in the control group and 29 were in the experimental group. The study was measured with a structured questionnaire consisting of general characteristics, knowledge related to delivery, subjective (Johnson, 1974) and objective(McLachlan, 1974) labor pain scale, data collection was done by research during the period from April, 2000 to July, 2000 and data was analyzed by descriptive statistics, $x^2$-test, and t-test. The results were as follows: 1. The scores of total labor pain in the group which had LI-4 pressure applied were lower($347.62{\pm}49.84$) than in the group($411.02{\pm}55.79$) which did not have LI-4 pressure applied; And these differences were statistically significant(t=4.7193, p=.000). 1-1. The scores of subjective labor pain in the group which had LI-4 pressure applied were lower($203.44${\pm}33.88$)$ than in the group ($$233.82{\pm}31.31$$) which did not have LI-4 pressure applied(t=3.6953, p=.000). 1-2. The scores of objective pain in the group which had LI-4 pressure applied were lower ($144.18{\pm}29.12$) than in the group which did not have LI-4 pressure applied($177.20{\pm}35.01$). but there were no statistically significant differences found in regard to the scores of objective pain(t=4.0271, p=.000). 3. The duration of delivery time in the group which had LI-4 pressure applied was shorter ($390.51min{\pm}111.91$) than in the group ($460.44min{\pm}190.78$)which did not have LI-4 pressure applied and the duration of delivery time in the experimental group was statistically more significant than that in the control group. therefore this thesis was adapted(t=1.734, p=.0879). It could be concluded that LI-4 pressure is effective in relation to labor pain and duration of delivery time for primipara women. Therefore it is necessary to increase the number of subjects to generalize this result.

• 한국통신학회논문지
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• 제31권9A호
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• pp.868-877
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• 2006

센서 네트워크에서 시각 동기 기술은 위치 추적, 암호화 기술에서의 타임 스탬프, 타 노드들로부터의 같은 이벤트 중복 감지 인식, 기록된 이벤트들의 발생 순서 구분 등 다양한 응용을 위해 필수적이다. 그리고 최근 센서 네트워크에서 신뢰성 및 고장 허용성에 대한 문제가 최근 연구의 주요한 영역으로 대두되고 있다. 본 논문에서는 네트워크 고장과 클럭 고장이라는 두가지 고장 모델을 가정하여 센서 네트워크에서 고장 허용 시각 관리 기법에 대해 제시한다. 제안한 기법은 노드 클럭의 불안정한 동요나 표류율에 심각한 변화가 발생하는 등의 고장이 발생했을 때 이러한 클럭 오류의 네트워크 전파를 제한하며 토폴로지 변화에 대응한다. 시뮬레이션 결과는 제안한 동기 기법이 기존의 TPSN과 비교하여 클럭 고장이 있을 때 동기화 비율이 $1.5{\sim}2.0$배 나은 성능을 보인다.