농업용수의 수온 상승에 관한 연구

황은,김철규,이상범,Hwang, Eun,Kim, Cheol-Gyu,Lee, Sang-Beom 한국수자원학회 1972 한국수자원학회논문집 Vol.5 No.2

The persent study aims at finding out a means of prevention cool spell damages on the hilly areas. The irrigation plots of 24 hour stored water warm water way and warm water plots, cool water way are respectively established to find out water temperature and influnce on the growing rice plants. The results obtained are summed up as follows. 1. Warm water areas consisted of $5 m^2 Q=0.93 1{\ell}/sec$, V=31 cm/sec, S=1/1, 000, L=81.6m, B=5cm, h=6cm, t=4min 33sec, drops=9 areas, are constructed to help the water temperature of $14.5^{\circ}C$ rise to that of $21.6^{\circ}C$. This indicates lower temperature than $23^{\circ}C$ of critical water temperature in irrigation facilities by $1.45^{\circ}C$ and than $26.2^{\circ}C$ of balanced water temperature of Seoul arears by $4.6^{\circ}C$. But this does not give much influance on rice plant cultivation. 2. The rising of water temperature is influened according to the temperature, solar radiation but the water temperature changes according to the heat absorption of organized materials, weather and terraces. The difference of water temperature could be found in the first growing stage. 3. Through the warm water way of water rises to the temperature of $21.6^{\circ}C$ which also rises to the temperature of around $30^{\circ}C$ in the paddy field of submerged irrigation. The rice plants are comparatively free from prolonged cool damage, reproduction abstructive damage. 4. The water temperature in rice field in proportion to temperature influence of weather condition but the water temperature approaches to that of weather in the days of later growing stage and water temperature become lower than the air temperature in the fruit stage. 5. The water in the submreged field is $10^{\circ}C$ warmer than in the warm water way during the first growing stage period but the water temperature in the warm water way is warmer in the later growing stage period. The cool water of $14.5^{\circ}C$ is warmed to $30.1^{\circ}C$ and rice plants cultivation is free from other damages. 6. The 12% increased production or 570.98kg/10a is made cool water plot by rising the temperature of water from $14.5^{\circ}C$ to $21.6^{\circ}C$ making the water run through warm water way. 7. The damage inflicted by the cool water irrigation during the first growing stage period is the obstruction of peak tillering stage and the obstruction of heading the later growing stage period and the obstruction of fruiting and number of panides per fill.

중환자실에 입원한 급성 신부전 환자에서 지속적 신대체요법

황은아 ( Eun Ah Hwang ),윤정수 ( Jeong Soo Yoon ),장미현 ( Mi Hyun Jang ),김정은 ( Jung Eun Kim ),강성식 ( Seong Sik Kang ),최고 ( Go Choi ),한승엽 ( Seung Yeup Han ),박성배 ( Sung Bae Park ),김현철 ( Hyun Chul Kim ) 대한신장학회 2009 Kidney Research and Clinical Practice Vol.28 No.6

Purpose: The mortality rate in critically ill patients with acute renal failure (ARF) remains unacceptably high, despite numerous advances in dialysis techniques and intensive care medicine. We evaluated clinical characteristics and prognostic factors in ICU patients with ARF requiring continuous renal replacement therapy (CRRT). Methods: We retrospectively reviewed the medical records of all ICU patients who received CRRT at the Keimyung University Dongsan Hospital from September 2002 to October 2007. Results: Total number of patients who required CRRT in ICU was 58. The mean age was 58.3±14.8 years. The treatment duration of CRRT was 63.5±40.7 hours. The mechanical ventilation rate was 82.8%, vasoactive drug 79.3%, sepsis 39.7%. APACHE II score was 25.2±7.9, SAPS II score 48.1±15.1, CCF score 9.3±3.6, the number of organ dysfunction 2.1±1.3. Overall mortality rate was 48%. When we compared sepsis group with non-sepsis group, the number of organ dysfunction and severity of illness were significantly higher in sepsis group than that of non-sepsis group. A mortality rate of sepsis group was significantly higher than non-sepsis group (82.6% vs 31.3%, p<0.001). In univariate analysis, significant risk factors for mortality were the number of organ dysfunction, severity of illness, MAP, platelet count, serum albumin level, and a type of hemofilter. Significances of all these factors were lost in multiple linear regression analysis. Conclusion: A large scaled, prospective randomized multi-center trials are needed to confirm the beneficial effect of CRRT in patient with ARF in ICU.

산촌의 종합개발과 산지개발

황은,Hwang, Eun 한국농공학회 1986 한국농공학회논문집 Vol.28 No.4

식량 안보와 농지확대

황은,Hwang, Eun 한국농공학회 1981 한국농공학회논문집 Vol.23 No.3

불도우저에 의한 개간 공법의 개선과 숙지화에 관한 연구(II)

황은,Hwang, Eun 한국농공학회 1975 한국농공학회논문집 Vol.17 No.2

불도우저에 의한 개간 공법의 개선과 숙지화에 관한 연구

황은,Hwang, Eun 한국농공학회 1975 한국농공학회논문집 Vol.17 No.1

The Government is trying to increase total food grain yield to meet national self sufficiency by means of increasing unit yield as well as extending crop land, and this year he set the target of 321,000 hectare of forest to clear for cropping. This study was carried to investigate the most efficient method of clearing hillock by bulldozer, and successful method to develope yielding potential of newly cleared land in short term. Since the conventional land clearing method is just earth leveling and root removing neglecting top soil treatment, the growth of crop was poor and farmer tends not to care the land. The top-soil-furrowing method is applied through out this study, that is advantageous especially for the land having shallow top soil and low fertility like Korean forest. In this study, various operating method were tried to find out most efficient method separately in connection with the land slope less than 25 percent and over, and several fertilizing methods to develop yielding potential. The results are as follows; 1) For the natural land slope utilization method, applicable to the land having less than 25 percent slope, reverse operating was more efficient than using forward gear of bulldozer. The operating time was 3 hour 32 minutes and 36 seconds using forward gear was 2 hour 32 minutes and 30 seconds for reverse gear operation per 1,000 square meter. 2) Bulldozer having angle blade adjustment needed 7hr 15min. for constructing of terrace per 10a compaire with the one having angle & tilt adjustment needed 6hr 4min for same operations. Specially there is significant difference for operation time of first period (earth cutting) such as bulldozer having angle blade adjustment needed 3hr 56min compaired with the one having angle & tilt adjustment 3hr 59min. In construction of terrace, the bull-dozer having tilting and angle blade adjustment was most suitable and performed efficiently. 3) For the fertilizer application treatment, the grass (Ladino clover) yield in first year was almost same as ordinary field's in the plot applied(N.P.K+lime+manure) while none fertilizer plot showed one tenth of it, and (N.P.K.+lime) applied plot yielded on third. 4) The effect of different land clearing method to yield showed significant difference between each treatment especially in the first year, and the conventional method was the lowest. In the second year, still conventional terracing plot yielded only half of ordinary field while the other plots showed as same as ordinary field's. 5) The downward top soil treatment plot showed most rapid improvement in soil structure during one year physio chemically, it showed increase in pH rate and organic composition, and the soil changed gradually from loam to sand-loam and the moisture content increased against the pF rate, and it gives good condition to grow hay due to the increase of field water capacity with higher available water content. 6) Since the soil of tested area was granite, the rate of soil errosion was increased about 2 to 5 percent influencing in soil structure more sand reducing clay content, and an optimum contour farming method should be prepared as a counter measure of errosion.

무선망에서 데이터 전송 향상을 위한 SCTP SNOOP 적용 연구

황은아(Hwang Eun-Ah),송복섭(Seong Bok-Sob),김정호(Kim Jeong-Ho) 한국콘텐츠학회 2007 한국콘텐츠학회 종합학술대회 논문집 Vol.5 No.2_1

최근 유무선 혼합망의 사용이 증가됨에 따라 무선망의 핸드오프, 경로 손실, 페이딩, 등과 같은 전송 오류의 원인을 개선하기 위한 연구가 전개되고 있다. 유선의 신뢰성을 보장하는 표준 TCP, SCTP를 무선망에 적용하는 것은 혼잡제어, 흐름제어의 메커니즘을 적용함으로써 데이터 전송의 효율을 저하시킨다. 본 연구는 무선망에서 SCTP를 적용하기 위해서 SCTP와 SNOOP을 혼합하는 것으로, 무선망에서 전송오류가 발생했을 때 BS의 동작과정을 개선한 것이다. BS (Basic Station : 기지국)는 전송오류 시 ZWP(Zero Window Probe)를 MN(Mobile N여:e이동노드)에게 보내어 경로와 상태를 확인하고 RWND를 갱신하여 에러상태를 확인한다. 그리고 새로운 경로를 선택하고, FH(Fixed Host : 고정호스트)에게는 ZWA(Zero Window Advertisement)를 보내어 혼잡제어나, 흐름제어 메커니즘을 호출하는 것을 방지하고 대기상태로 기다리게 한다. 무선망의 연결이 안정된 후에 데이터 전송을 함으로써 데이터의 전송 효율을 약 10% 향상한다. Recently the use of wireless network increases according to it solves the hand-off and with path loss, pading, noise etc of wireless network the research for transmission error improvement is developed. TCP and SCTP of standard where it guarantees the reliability of wire network apply in wireless network the congestion control, flow control mechanism used it decreases the efficiency of data transfer throughputs. In this paper, It mixes SCTP and SNOOP for SCTP apply on wireless network, to improve BS(Basic Station) operation processes when the transmission error occurs in wireless network. BS send ZWP(Zero Window Probe) to MN(Mobile Node) when the transmission error occurs so, check path and status and update RWND and error status checked. It selects the new path, send ZWA(Zero Window Advertisement) to FH(Fixed Host) and the prevents call to congestion control or flow control and it does to make wait status standing. Continuously of data transfer after the connection of wireless network is stabilized, it make increase about 10% the transmission throughput of data.

신품종 통일 벼(IR667)의 용수량측정시험

황은,김철규,Hwang, Eun,Kim, Chul-Kyu 한국농공학회 1971 한국농공학회논문집 Vol.13 No.4

기적의 법씨라 불리우는 통일(統一)(IR 667)의 출현(出現)으로 답용수량산출(畓用水量算出)에 변동(變動)이 생기지 않을까하여 본시험(本試驗)을 실시하였던바 다음과같은 사실(事實)을 알게되었다. (1) 엽수면증발량(葉水面蒸發量)과 증발계증발량(蒸發計蒸發量)의 비(比)는 식양토(埴壤土) ET/V=1.84, 양토(壤土) ET/V=2.00로 지금까지의 어느 품종(品種)보다 그 값이 컷다. (2) 생육기별(生育期別) ET/V를 볼 때 분약후기(分藥后期)와 유수형성기(幼穗形成期)에 $3.30{\sim}3.77$로 그 값이 커진다. (3) 증산비(蒸散比)는 식양토(埴壤土) 260.4, 양토(壤土) 275.0으로 모두 300이하(以下)이었다. This experiment is conducted to see the alteration in calculation of amount of duty of water in paddy fields, by the miraculous rice TONG-IL(IR667) made its appearance to us, therefore results obtained were summarized as follow. 1. In comparison with depth of evapo-transpiration and evaporation in the evaporator, the ratio is ET/V=1.84 in clay loam and ET/V=2.00 in loam, the value is larger than any vairety. 2. Comparison by growing periods of rice plants growing period 5 and Ear for mation stage (primor stage) 6 ET/V value grow larger from 3.30 to 3.77. 3. Transpiration ratio is 260.4 in clay loam and 275.0 in loam, two value are less than 300.

기계 개간의 새로운 작업 체계와 숙지화 촉진에 관한 연구

황은,Hwang, Eun 한국농공학회 1972 한국농공학회논문집 Vol.14 No.1

Instead of fertilizing the lands they moved to find other fertile lands and lived a feudal life agriculture and various machincs played a main role in the land reclamation. The best method of land clearing, the time and capacity in the operation and the effect of growing crops should systematically analized prior to the time of 3rd Five-year Economic Development(1972-1976) in order to cultivate 210,000ha of wasteland or the modernization of our country. The present study was investigated to find out a new working-system of mechanical land clearing and development of fertile soil. The results are as follows: 1) The first stage of productive power increases when weeds were mixed soil in the land clearing work in order to supply organic materials and to make soil swollen instead of burning or just removing. 2) The equipments such as bulldozers, harrows, power tillers and so on should be prepared in order to do a systematic work in the land clearing. 3) The work of pulling-up roots is dependent upon the forms of roots spreading under the ground. The work of the pulling-up of the straight roots was most difficult. But before the roots are pulling-up we do not know the forms of roots. 4) The cutting of soil from upside to under side land clearing method (II) Spent 6 hr 7 min 43 sec per 1 Danbo in doing land clearing and control method spent 4 hr 52 min 30 sec per 1 Danbo in doing land cearing. No significant difference could be found between II treatment type and I treatment type. 5) The volume of soil carried by bulldozer $270.38m^3$ per 1 Danbo in I type and in II type, $368.58m^3$ per 1 Danbo or about 36% increased in II type then in I type. But that is not a significant difference when considering the whole productive power of soil. 6) The land clearing of terrace by bulldozers cannot escape making the embankment slope of about $45^{\circ}$, and 25.3% should be decreased in the area. It is recommended to make use of the embankment slope by planting grass for cows. 7) The time of retary tilling increased 2.3 times or 1 hr 42 min 22 sec per 1 Danbo compared to the timesrequired in the harrowing. Because it mixed the Organic matter on ground and the harrowing of subsoil. 8) The havest of pasture growing on the land reclamation in natural slope is as follows. (a) The none fertilizers with reclaimed block of productivity decresed 1/10 than that of the farmland. Therefore the none fer tilizing in the cultivated pasture is unprofitable. (b) The havest of the manured IV treatment block was the best not only in the kinds of fertilizers but also in the kinds of pasture grass.

학교 건축물 내진보강 시공현장 관리를 위한 가이드라인 개발 및 적용에 관한 연구

황은아 ( Hwang Eun-a ),이병호 ( Lee Byoung-ho ),박구병 ( Park Ku-byoung ) 한국건축시공학회 2020 한국건축시공학회 학술발표대회 논문집 Vol.20 No.1

The government seismic retrofit project for educational facilities is progressing more actively due to the 2018 Pohang earthquake. It is most important that seismic retrofit constructions are conformed to seismic design to achieve the desired purpose of the project as reduce direct damage caused by earthquake. However, the construction supervision system is not mandatory for the retrofit construction site of small buildings including school buildings according to applicable laws and regulations. The purpose of this study was to develop a guide for constructions management of school building seismic retrofit. In order to achieve this goal, the survey on the construction site was conducted and various problems related to the construction site of school building seismic retrofit was derived Additionally, the systematic checklist was presented according to the user and seismic reinforcement method.