• Asian-Australasian Journal of Animal Sciences
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• 제16권11호
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• pp.1565-1571
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• 2003

Physiological mechanisms, involved in unusual ovulatory sequences in domestic hen are remaining undefined. One hundred individually caged white leghorn birds were divided into two equal groups viz. control and treatment, and 2-bromo-$\alpha$-ergocryptine, was administered to birds in the treatment group to modulate prolactin (PRL) secretion from anterior pituitary gland. The effect of modulation of PRL concentrations on egg production, sequence length and intersequence pause length were studied by analysis of oviposition records of the birds from 24 to 72 weeks of age. The surviving 48 birds in the control and treatment groups averaged $34.58{\pm}1.7$ and $25.67{\pm}1.15$ sequences of oviposition, with a mean sequence length of $9.92{\pm}0.63$ and ${\pm}1.12$ days respectively. Most of the birds had a single characteristically long sequence during the entire reproductive cycle, which averaged $46.04{\pm}3.09$ days in the control birds and $59.33{\pm}4.44$ days in the treated birds. 2-bromo-$\alpha$-ergocriptine treatments had significantly decreased (p$\leq$0.01) the circulating concentrations of PRL compared to the birds of the control group. This resulted in a significant increase (p$\leq$0.01) in the number of laying days in birds of the treatment group with a concomitant decrease in the intersequence pause length. The decreased PRL levels during prime sequences in birds of the both groups, reveals the negative role of the circulating PRL levels on egg production with concomitant shorter intersequence pause length. Hence, modulation of PRL with dopamine agonist may enhance the reproductive efficiency of hens later in life.

• 한국수학교육학회지시리즈A:수학교육
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• 제59권3호
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• pp.271-294
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• 2020

본 연구의 목적은 예비교사들이 학생 사고를 도출하는 핵심 교수 관행에 근접하도록 돕는 디지털 시뮬레이션의 활용 가능성을 탐색하는 것이었다. 초등 수학교육 방법론을 수강하는 13명의 예비교사들이 참여한 디지털 시뮬레이션을 분석한 결과, 예비교사들은 일반적인 질문에서 내용-특화된 질문을 제기하였으며, 학생들의 해결전략을 비교하였다. 예비교사들은 다양한 이유로 시뮬레이션의 '일시 정지' 기능을 활용하였다. 예비교사들은 학생-아바타와 실시간으로 상호작용하는데 부담을 느꼈지만, 디지털 시뮬레이션을 진정한 교수 경험으로 파악했으며, 그 유용성을 강조하였다.

• 한국통신학회논문지
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• 제30권12B
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• pp.838-846
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• 2005

본 논문은 동기식 이더넷 시스템의 구현 시 고려해야 할 다음과 같은 두 가지의 사항에 대한 해결방안을 제시한 것이다. 첫째, 실시간 및 비실시간 트래픽을 모두 지원하기 위하여 일정주기의 사이클 기반으로 동작하는 동기식 이더넷 시스템은 이미 송신이 진행 중인 비실시간 프레임 때문에, 사이클의 시작 시점이 지연됨으로서 실시간 트래픽의 전송이 지연되는 문제점을 가지고 있다. 이 점에 착안하여, 기존 방식의 지터 성능을 분석한 후, 다음 사이클의 시작 시점을 참조하여 비실시간 프레임을 여러 사이클에 분할하여 전송함으로써 실시간 트래픽에 대하여 지터가 전혀 없는 엄격한 전송을 보장하는 방법을 제안하고, 또 다른 지터 억제 방식인 전송보류(hold) 방식과의 프레임 전송지연 특성을 비교 분석하였다. 두 번째는 한 사이클 내의 실시간 트래픽 전송 구간에는 비실시간 프레임을 전승할 수 없기 때문에, 신속히 송신되어야 할 링크 계층에서의 흐름제어용 IEEE 802.3x 중지(pause) 프레임의 전송이 지연됨으로써 과도한 비실시간 프레임의 손실을 초래하는 문제점이 있다. 이 점에 착안하여 실시간 트래픽 전송 구간에서도 흐름제어용 프레임의 전송을 허용하도록 하는 새로운 흐름제어 방법을 제안하고 이에 따른 비실시간 트래픽의 손실률을 분석하였다.

• 한국응급구조학회지
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• 제19권2호
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• pp.7-17
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• 2015

Purpose: This study aimed to compare the effects of rescue ventilation maneuvers on the quality of two-rescuer cardiopulmonary resuscitation (CPR). Methods: We implemented mouth to mouth (MMV), mouth to pocket mask (MPV) and bag-valve mask ventilation (BMV) maneuvers. Each team of two-nurses was randomized to perform three consecutive sessions of two-rescuer CPR by using three artificial ventilation maneuvers. Results: The subjects were 26 teams of nurses (female: 96.2%, male: 3.8%, age: 26.6 years). Failed ventilation was more frequent in BMV ($2.23{\pm}2.21$, p <.001) than MMV ($0.31{\pm}0.74$) and MPV ($0.38{\pm}0.64$). BMV had more compressions per minute ($93.7{\pm}5.7$) than MMV ($87.0{\pm}7.2$, p = .001) and shorter total compression pause time ($46.1{\pm}5.8sec$) and compression pause fraction ($23.3{\pm}2.2%$) than MMV ($54.8{\pm}10.3sec$, p = .001, $25.5{\pm}3.5%$, p = .001, respectively) and MPV ($53.1{\pm}7.1sec$, p =. 006 and $25.8{\pm}2.6%$, p = .006, respectively). Conclusion: In our simulation study, BMV reduced the compression pause time and increased the number of compressions per minute, thus indicating CPR provided to patients was effective. However, considering the high rate of ventilation failure, we recommend periodic training.

• International Journal of Internet, Broadcasting and Communication
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• 제12권4호
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• pp.93-101
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• 2020

Shipyards are potential environments for using IoT services, sensor networks, and delay tolerant networks. Simulations of those services and networks strongly rely on human mobility models. Results obtained with an unrealistic model may not reflect the true performance of applications, protocols, and algorithms in a shipyard. A lot of synthetic models for human movements have been studied but most of them are generic and focus on the daily movements of humans on city scales. Nevertheless, workers in shipyards have unique movement characteristics such as movement speed, pause time, and attractions places. For instance, workers usually move to some places, where they work, and rarely move to other places in the factory. Movement characteristics of workers not only depend on workers but also on tasks, which they do. For instance, workers, who paint ships, have similar movement speed and pause time. Hence, in this paper, human movements in shipyards are studied. We propose a new human mobility model called the human mobility mode in shipyards (MIS). In MIS, workers are classified into multiple types. Movement characteristics of a worker are similar to other workers in the same type. Based on the visiting probability, workers have some places, where they frequently visits, and some places, where they rarely visit. We analyze real mobility traces and studie to achieve human movement characteristics from real traces. The results show that MIS provides a well-match to the movement characteristic from real traces.

• 한국음향학회지
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• 제15권6호
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• pp.26-32
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• 1996

본 논문은 자연스러운 여성 합성음을 위한 피치 변화 법칙을 세웠다. 피치 변화 법칙이 적용되는 기본 단위, 즉 억양구는 주로 어절(들)로 이것의 첫번째, 두번째, 마지막 음절의 피치값을 연결해 피치 변화 곡선을 형성하였는데, 첫번째, 두번째 음절의 피치값은 각 음절의 초성에 따라, 마지막 음절의 피치값은 기능어의 종류에 따라 결정되었다. 억양구 사이에는 '쉼(pause)이 있는 경계' 또는 '쉼이 없는 경계'가 오며, 쉼이 있는 경계에는 relaxation이 있다. 이러한 억양구의 피치 변화 곡선, 경계 현상들이 모여 한 문장의 피치 턴을 만들었다.

• Journal of information and communication convergence engineering
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• 제7권2호
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• pp.223-230
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• 2009

For pulse trigger way and the energy injection rate according to PET ($Pause^{10-90}$ $Energy^{20-40}$ $Trigger^{1-7}$) function, indeed, human body condition, period of dormancy in this research about this back correctly adjustment possible and designed harmless micro carrying along style hair exclusion so that can design and manufacture and run special quality examination and Xenon flash lamp to crawl in human body. Because creating individual's skin model to do stable treatment by light transmission way by skin impedance and measure, must embody treatment special quality of most suitable that draw skin color, energy, wave length, approximately, transmission time, pulse delay etc. and want. Specially, saved standard of war treatment pulse modeling by skin impedance, and manufacture pulse modeling system of most suitable by skin subordinate, and embody suitable treatment pulse. Specially, embody as could do root of a hair exclusion being emitted in pulse form using multi wave length of 560nm, 590nm, 640nm, 755nm and embodied clinical data. If become research repletion furthermore little more, is seen that can approximate in commercialization.

• 말소리와 음성과학
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• 제9권1호
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• pp.27-39
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• 2017

This paper deals with how speech rate in Korean is affected by the sociolinguistic factors such as region, gender and generation. Speech rate was quantified as articulation rate (excluding physical pauses) and speaking rate (including physical pauses), both expressed as the number of syllables per second (sps). Other acoustic measures such as pause frequency and duration were also examined. Four hundred twelve subjects were chosen from Korean Standard Speech Database considering their age, gender and region. The result shows that generation has a significant effect on both speaking rate and articulation rate. Younger speakers produce their speech with significantly faster speaking rate and articulation rate than older speakers. Mean duration of total pause interval and the total number of pause of older speakers are also significantly different to those of younger speakers. Gender has a significant effect only on articulation rate, which means male speakers' speech rate is characterized by faster articulation rate, longer and more frequent pauses. Finally, region has no effect both on speaking and articulation rates.

• 한국음향학회지
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• 제31권2호
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• pp.63-72
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• 2012

본 연구는 다문화가정 베트남과 필리핀 이주여성의 발화속도와 쉼 특성에 대한 음향학적인 분석을 통하여 이주여성 대상 한국어교육 프로그램 개발의 기초자료를 제공하고자 하였다. 이주여성은 한국여성에 비해 느린 발화속도, 긴 쉼 지속시간과 높은 쉼 빈도를 나타냈다. 베트남집단보다 상대적으로 한국 거주기간이 긴 필리핀집단은 한국집단에 보다 가까운 특성을 보였다. 이주여성의 발화속도가 느리게 나타난 것은 조음속도가 느리고 거의 어절마다 쉼을 두고 읽는 습관에 기인한 것으로 보인다.

• 말소리와 음성과학
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• 제6권4호
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• pp.189-194
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• 2014

Objective: This study aims to investigate the speech rate, the length of a pause, habitual pitch, and voice intensity of motherese. Subjects and Methods: The research participants comprised 20 mothers (mean age 33 years). Speech data were collected and analyzed using the Real-time Pitch software (KayPENTAX(R)). Results: The average speech rate was 5.33 syllables per second without their infant present and 4.26 syllables per second with their infant present. The average pause length was 1.09 s without their infant present and 1.56 s with their infant present. The average habitual pitch was 199.79 Hz without their infant present and 227.15 Hz with their infant present. The average voice loudness was 61.09 dB without their infant present and 64.49 dB with their infant present. Conclusion: This study presented clinical information for efficiently managing the speech therapy issues of infants and children. This includes proper acoustic and phonological information to recommend to main caregivers.