• Title/Summary/Keyword: Stair

Search Result 364, Processing Time 0.03 seconds

Sync Stair Protocol in WSN (WSN을 위한 Sync Stair 프로토콜)

  • Ahn, Il-Yeup;Lee, Sang-Shin;Kim, Tae-Hyun;Song, Min-Hwan;Won, Kwang-Ho;Kim, Jae-Ho
    • Proceedings of the IEEK Conference
    • /
    • 2007.07a
    • /
    • pp.35-36
    • /
    • 2007

  • 본 논문은 beacon을 기준으로 등기화된 노드들 간의 데이터 전송을 위한 프로토콜로써 실시간성과 낮은 전력 소모를 보장하고 있다 이 프로토콜은 노드가 주위 센서 노드로부터의 데이터를 모아서 계단 형태로 부모 노드에게 동기화 되어 전송하는 Sync-Stair 센서 네트워크 프로토콜이며, 기본적으로 TDMA를 기반으로 동기화되며 데이터 전송을 위해 CSMA-CA를 사용한다. Sync-Stair 네트워크는 Branch 노드와 Sensor 노드의 2 종류의 디바이스 타입이 존재한다.

  • PDF

Effect of Stepped Pattern of Feed Intake Using Rice Straw as Roughage Source on Regulation of Growth, Reproduction and Lactation in Dairy Heifers

  • Jin, M.G.;Lee, H.G.;Lee, H.J.;Hong, Z.S.;Wang, J.H.;Yin, Y.H.;Jin, R.H.;Cho, K.K.;Choi, Y.J.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.17 no.6
    • /
    • pp.794-798
    • /
    • 2004

  • An attempt was made to improve the efficiency of growth and lactation performance of dairy heifers subjected to a stair-step growth scheme using rice straw as the sole roughage source. Twenty-four young Holstein heifers were randomly assigned to either control or test group. The control diet met the National Research Council (NRC) requirement, with heifers calving at 24 to 26 mo of age. The test group was individually fed according to a schedule of 3, 2, 4, 2, 5 and 2 mo in which feed intake was alternately 20% below or 25% above the NRC requirements. Heifers on the stair-step growth pattern gained more body weight and consumed less dry matter (10.80 and 11.22%, respectively), resulting an increasing growth efficiency compared with the control. Body condition, first estrus, first conception, services per conception and calving difficulty (data not shown) were not affected. Milk yield of the test group was 8.5% higher than that of the control group. During the early lactation period, the milk yield was significantly higher in the stair-step group than in that of the control group (p<0.05). Milk composition was not affected by compensatory growth induced by the stair-step scheme. Also, weight at calving and calf growth performance was not affected by stair-step growth. The results indicate that using rice straw as a sole roughage source in a stair-step compensatory growth scheme can contribute to the improvement of growth efficiency and early lactation performance.

  • https://doi.org/10.5713/ajas.2004.794 인용 PDF KSCI

A Study about the Evacuation Guidance that Used Phosphorescent Material for Stairs (축광재료를 부착한 계단의 피난유도에 관한 연구)

  • Hur, Man-Sung;Fujita, Akihiro;Bitosho, Bitosho
    • Fire Science and Engineering
    • /
    • v.22 no.1
    • /
    • pp.29-36
    • /
    • 2008

  • This study is intended to examine the effect of the evacuation guidance that used phosphorescent material for stairs in the event of smoke and failure of both the power to the lighting and illuminated sign. To achieve the purpose, the test stairs was established and 35 students(1st 20, 2nd 15) were examined the visibility, the convenience and the comfort of going up and down of stairs. The results of this study are as follows; The evacuation from stairs showed that the stair nosing and landing used phosphorescent material for was very effective in dark conditions(0 lux) because of the high visibility of stair nosing and the convenience and the comfort of going up and down of stairs. The phosphorescent material located on the stair nosing and stair landing will aid in evacuation from stairs in the event of failure of both the power to the lightings and illuminated sign.

  • PDF KSCI

A Experimental Research on Stair Ascent Evacuation Support for Vulnerable People (안전약자 상층 대피 지원에 관한 실험적 연구)

  • Lee, Ji Hyang;Lee, Hyo Jeong;Kwon, Jin Suk;Park, Sang Hyun
    • Journal of the Korean Society of Safety
    • /
    • v.34 no.1
    • /
    • pp.90-97
    • /
    • 2019

  • This study is aiming to compare stair ascent transportation speed and physical burden of evacuation supporters according to the types of stair ascent transportation for vulnerable people experimentally. In this study, we measured heart rate of the supporters to indicate physical burden during the transportation. The subjects of this experiment were male students, age of 20-26. Experimental conditions were the ways of stair transportation and the weight of vulnerable people. The types of stair transportation were giving a piggyback ride and carrying a wheelchair. Each experimental trial was video-recorded for measurement of ascent speed and observing supporters movement. As a result of the experiment, as for the ascent transportation speed by piggyback ride from the first floor to the fourth floor, the average speed of the light case is 31 seconds and for the heavy case is 43 seconds. When it comes to the average speed of wheelchair transportation's average speed the light case is 1 minute and 11 seconds and the heavy case is 1 minute and 49 seconds. Therefore, it was indicated that when the weight of a vulnerable people is lighter, the transportation speed is faster. The heart rates of evacuation supporters are different depending on transportation methods or individual's condition but as repetitive transportation increases, they tend to reach the maximum heart rates.

  • https://doi.org/10.14346/JKOSOS.2019.34.1.90 인용 PDF KSCI HTML