• 한국수자원학회논문집
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• 제39권5호
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• pp.405-415
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• 2006

건조기 때의 합류식 관거 내 고형물의 퇴적으로 인해 통수능이 감소하여 여름철 장마시 국지적인 침수가 발생하며 이로 인해 관거 내 퇴적을 더욱 초래할 수가 있다. 또한 관거 시스템에 퇴적된 고형물로 인해 우기시 'first-flush' 현상을 초래하기도 한다. 이와 같은 문제를 해결하기 위해서는 장기간에 걸친 관거 내 고형물 퇴적량을 관측할 필요가 있으나 많은 비용과 노력이 수반되어야 한다. 따라서 본 연구에서는 미국환경보호청에서 개발한 건조기의 합류관거 내 고형물 퇴적량 산정기법을 우리나라의 배수유역에 적용하여 분석하였다. 분석결과 적용 배수유역의 가용 자료에 따라 모형을 선택하여 실무에서 간편하게 적용할 수가 있지만 모형별 변수산정 방법별로 많은 차이를 보이고 있다. 초기에 유도된 Eqs. (1)$\sim$(4)가 후에 유도된 Eqs. (5)$\sim$(9)보다 산정치가 모두 크게 나타나고 있으며 전반적으로 중간모형이 정밀모형이나 단순모형보다 크게 나타나고 있다. 건조기 동안의 관거 내 퇴적고형물의 관측자료가 구비되어 있지 않아 실질적으로 비교하기가 곤란하지만 대상 배수유역 관거에서의 장기적인 관측이 이루어지고 이에 따라 국내실정에 맞도록 산정공식의 수정이 이루어지면 실무에서 많은 비용과 노력을 줄이고 관거 관리를 할 수 있다고 판단된다.

• 한국버섯학회지
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• 제11권3호
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• pp.137-144
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• 2013

양송이버섯의 쉬운 변질에 따른 소비자 및 유통업체들의 피해를 예방하기위해 저장성이 증진된 품종을 개발하고자 현재 육성된 품종들의 수확시기, 저장온도 및 저장기간에 따른 저장성 정도를 파악하였다. $1{\cdot}2$주기동안 수확한 양송이를 35일 동안 4, 7, $10^{\circ}C$에 저장한 결과 전반적으로 중량은 감소하는 경향을 보였고, 자실체 대의 두께는 감소하였으며, 길이는 증가하는 것을 볼 수 있었다. 생육주기별로 보면 대의 두께와 길이가 1주기보다 2주기에 변화가 적은 양상을 보였고, 온도별로 대의 두께와 길이는 온도가 낮을수록 변화가 많이 나타났다. ${\Delta}E$(표면색도)의 변화는 1주기보다 2주기에 수확한 것이 갓과 대의 색도변화가 많았다. 또한 백색품종은 $10^{\circ}C$에서 ${\Delta}E$ 값의 차이가 크게 나타나 높은 온도에서 표면의 갓 및 대의 색이 변화가 심하다는 것을 알 수 있었으며, '다향'은 낮은 온도에서 변화가 컸다. 부위별로 보면 갓 부위에서 갈색품종이 백색품종보다 색의 변화가 적었다. L값(명도)는 ${\Delta}E$ 값과 생육주기 및 온도별 변화가 비슷한 경향을 보였다. 명도에 따른 저장기간을 보면 $1{\cdot}2$주기 수확한 양송이 중 백색품종은 1주일정도 저장할 수 있었고, '새도'품종이 수확 후 L값이 큰 것으로 보아 가장 좋은 상태로 수확된다는 것을 알 수 있었다. 품종별로 보면 '설강'품종의 L값이 저장기간 14일까지 좋은 상태로 유지되었지만, 28일이 지나면 급속도로 L값이 낮아지는 것을 볼 수 있었다. 그에 비해 '새정'품종은 모든 온도에서 35일까지 L값이 서서히 감소되는 것을 볼 수 있었다(Table 2). 평균적으로 형태적인 변화를 보면 '설강' 품종이 대의 굵기는 변화가 적은 반면에 길이 변화가 컸고, '505'품종이 저장함에 따라 길이변화가 적었다. 표면 색도변화는 갓 부위에서는 갈색양송인 '다향'이 가장 변화가 적었고, 백색양송이 중에는 '새정'품종이 변화가 적었으며, '505'가 가장 변화가 심했다. 대 부위에서는 '새아'품종이 변화도가 적었으며 '새도'품종이 가장 변화가 많았다. 양송이 선택시 갓의 색을 보는 경우가 많으므로 이 결과 도출로 '새정'품종이 유통과정 중 35일간 저장성 면에서 우수한 품질을 유지할 수 있다고 볼 수 있다.

• 대한한방부인과학회지
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• 제20권4호
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• pp.148-159
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• 2007

Purpose: Vasomotor symptoms including hot flash are very common to postmenopausal women. Estrogen therapy was regarded as the best option for relieving menopausal symptoms until 2002, when the Women#s Health Initiative(WHI) reported the side effect of the therapy. Consequently, studies on the complementary and alternative medical herbs and therapy for the management of menopausal symptoms have followed. And so we have reviewed some international clinical studies about the management of postmenopausal symptoms with acupuncture therapy. Methods: "Menopause and acupuncture" was designated as a key word in the search site. Pub Med, and nine papers dealing with hot flash among the relevant RCTs were selected, and then, the effect of acupuncture on hot flash and the way the researches had been done was examined. Results : The intensity of hot flash reduced significantly and the frequency of hot flash was inclined to reduce, but not significantly, compared to the controlled group. Conclusion: Each clinical test has its limitations in point of the number of the required samples. However, it still shows the possibility that acupuncture itself will be effective enough to reduce the intensity of hot flash to a certain degree. It is believed that extensive clinical tests on the effect of acupuncture on hot flash will need to be done hereafter. And when the tests are carried out, it is required to exclude placebo effect, do blind test, and carefully select and control the methods.

• 한국소음진동공학회논문집
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• 제25권3호
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• pp.150-159
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• 2015

An experimental study on frequency characteristics of the microphone array covered with Kevlar sheet was conducted in the closed test section. Microphones that were flush-mounted in the wall of wind tunnel were subjected to very high flow noise resulting from the turbulence in the wall boundary layer. This noise interference by the boundary layer was referred as 'a microphone self-noise' and various approaches were studied to reduce this interference. Recessed microphone array with high tensioned cover was one of the good approaches to reduce this self-noise. But, the array cover could cause an unexpected interference to the measuring results. In this paper the frequency characteristics of the microphone array with Kevlar cover was experimentally studied. The white noise was used as a reference noise source. Three kinds of tensions for the Kevlar cover were tested and those results were compared with the test results without the Kevlar cover. The gap effect between the cover and microphone head was also tested to find out the proper position of microphone in the array module. Test results show that the mid-tension and 10mm gap was the best choice in the tested cases.

• 대한기계학회논문집
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• 제19권7호
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• pp.1675-1683
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• 1995

A numerical study of the fluid flow and heat transfer characteristics of the two-dimensional impingement jet with a confinement plate has been carried out. The fluid flow was calculated by solving the full Navier-Stokes equation. In doing that, the well known SIMPLER algorithm was used and the trouble making convection term was discretized according to QUICKER scheme. The energy equation was simply solved by using the SOR method. For the Reynolds number of 10000, two channel heights, say 1.5 and 3.0 times the jet exit width, and two thermal boundary conditions constant wall temperature and constant wall heat flux were considered. Discrete heat sources were flush mounted along the impingement plate at a distance of 0, 2, 3, 4, 5, 6, 10, 12, times the jet exit width from the stagnation point. The length of each heat source is 4 times the jet exit width long. The Nusselt number averaged over each heat source was compared with experiment. Comparison shows that both calculations and experiment have the secondary peak of Nusselt number at downstream of stagnation point, even though there is a little quantitative difference in between. The difference is believed due to abscure thermal boundary condition in experiment and also accuracy of turbulence model used. The secondary peak is shown to be caused by rigorous turbulent flow motion generated as the wall jet flow is retarded and developes into the channel flow without flow reversal.

• 한국균학회지
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• 제10권4호
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• pp.173-176
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• 1982

양송이 부패병원균(腐敗病原菌)의 발병요인(發病要因) 및 방제(防除)에 관(關)하여 몇 가지 시험(試驗)을 수행(遂行)한바 그 결과(結果)는 다음과 같았다. 1. 부패병원균(腐敗病原菌)의 균사생장(菌絲生長) 적온(適溫)은 $15{\sim}20^{\circ}C$로 양송이균사(菌絲)보다 저온(低溫)이었다. 2. 본(本) 병원균(病原菌)의 균사생장(菌絲生長) 최적산도(最適酸度)(pH)는 $6{\sim}7$이었다. 3. 본(本) 병원균(病原菌)의 전염시기별(傳染時期別) 피해정도(被害程度)는 복토시(覆土時)부터 3주기말(週期末)에 심(甚)하였고 그 이후에는 피해(被害)가 적었다. 4. 본(本) 병원균(病原菌)의 균사(菌絲)는 $50^{\circ}C$에서 20분이상(分以上), 포자(胞子)는 $50^{\circ}C$에서 60분(分) 또는 $90^{\circ}C$에서 20분간(分間) 열처리(熱處理)로서 사멸(死滅)되었다. 5. 각종(各種) 살균제중(殺菌劑中)에서 Benlate, Homai, Dithane M 45등(等)이 실내(室內) 및 포장시험(圃場試驗)에서 가장 약효가 높았다.

• 대한한방부인과학회지
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• 제30권4호
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• pp.135-148
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• 2017

Objectives: This study was aimed to develop a Korean medicine clinical practice guidelines (CPG) of Climacteric and Postmenopausal Syndrome Methods: We conducted a questionnaire survey targeting Korean medicine doctors belonging to the Association of Korean Obstetrics and gynecology by e-mail and analyzed the answers. On October 18, 2016, we sent questionnaires to 583 people, and on October 31, 2016, we sent questionnaires to 581 people again. A survey ended on November 15, 2016. A total of 56 responded. Results: 1. 91.07% of respondents knew the concepts and contents of CPG, and all respondents agreed about the necessity of CPG. 2. Most common symptom of climacteric and postmenopausal syndrome that 65.75% of the respondents answered was the hot flush 3. To diagnosis a climacteric and postmenopausal syndrome, 69.64% of the respondents used pattern identification diagnosis mainly. 4. 36.84% of the respondents answered that herbal medicine and acupuncture are the most effective treatments for climacteric and postmenopausal syndrome. The most commonly used herb medicine was Kamisoyo-san. Conclusions: We figured out Korean Medicine doctors' recognition of Korean medicine clinical practice guideline, clinical diagnosis, treatment on climacteric and postmenopausal syndrome to make the contents of the CPG reflecting the clinical situation. Further research will be needed in the future.

• 화훼연구
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• 제17권4호
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• pp.262-265
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• 2009

본 연구는 한국특산식물인 히어리의 대량번식을 위하여 생장패턴과 관련한 삽목적기를 알아보고자 수행되었다. 히어리의 신초는 4월초 개화 직후에 발생이 되었다. 발생한 신초는 6월말까지 급속하게 생장을 하다가 그 후에는 생장속도가 다소 둔화되어 정지하는 전형적인 온대성 낙엽활엽수의 1차적인 생장곡선을 나타내었다. 삽수의 수분함량은 신초발생 이후 5월까지 증가하다가 그 후 수분이 감소하는 경향이었다. 6월 20일의 수분함량은 71.2%였다. 히어리는 숙지삽에 비해 당년지를 이용한 녹지삽이 삽목번식에 유리하였다. 당년지를 삽목한 5월부터 9월까지도 삽목시기에 따라 큰 차이가 있었는데, 특히 6월 20일에 삽목하였을때 발근력이 타 시기에 비해 월등하게 좋았다.

• 대한한방부인과학회지
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• 제28권1호
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• pp.85-91
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• 2015

Objectives: Postmenopausal symptoms are subject to many factors. Recently, obesity has been suggested as a factor of hot flush. So this study aims to report the relationship between body composition and Menopause Rating Scale (MRS), The Menopause-specific Quality of Life Questionnaire (MENQOL) of postmenopausal women. Methods: We studied 42 climacteric women who had visited Kyung Hee University Hospital at Gangdong from April 2011 to July 2014. 42 women had filled out MRS, MENQOL, and they had taken body composition tests. Pearson correlation tests were conducted. (Correlation was statistically significant at the 0.05 level) Results: Correlation between psychological subscale of MENQOL and Waist-Hip Ratio (WHR) was statistically significant (pearson correlation coefficient=0.385; p-value=0.012). But other subscales of MRS and MENQOL were not statistically related with body composition. Conclusions: WHR could be an important factor of psychological health of menopausal women. So, abdominal fat reduction must be considered when curing menopausal symptoms. In connection with climacteric depression, well-designed studies would be necessary.

• 상하수도학회지
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• 제33권2호
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• pp.121-129
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• 2019

If sewage flows for an extended time at low velocities, solids may be deposited in the sewer. Sufficient velocity or tractive force should be developed regularly to flush out any solids that may have been deposited during low flow periods. This study aims to evaluate the periods (T) during which sewage flow greater than the minimum tractive force maintains on a spot in sewer pipe system with lower tractive force or lower velocity than expected in the design step, when a storage tank installed in a place upsteam pours water into the sewer. The effect to T of design factors of storage tank and sewer pipes was evaluated assuming the uniform flow in sewers. When the area of orifice in the storage tank is $0.062m^2$(or 0.28 m diameter), the maximum T of 31sec was maintained using the usually used preset range of values of several design factors. As the horizontal cross section of storage tank and water depth of storage tank and roughness in sewers increase, T linearly increases. Also, T linearly decreases as the diameter of a sewer pipe increases. Although T gradually decreases as the sewer pipe slope decreases to around 0.005, T decreases sharply when the slope is less than 0.003.