• 보존과학연구
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• 통권30호
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• pp.47-61
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• 2009

Cultural heritages are affected by various environmental factors. Main factors are temperature, humidity, light and indoor air pollutants such as ozone, nitrogen oxides. Especially humidity condition is very important. Low humidity condition can cause contraction and high humidity condition can lead to growth of microorganism. This study is conducted to appraise an applicability of the Humidity Indicator which is one of the simple method for humidity control. The Humidity Indicator shows the humidity conditions through color change. Therefore, photometer was used to correctly measure the color change of Humidity Indicator. As a result of lab test, Humidity Indicators was stabilized after one hour from en exposure in a certain humidity condition and the indicators indicated clear correlations between color changes of Humidity Indicators and humidity conditions. Some Humidity Indicators which had been selected through the lab tests were applied to preservation facilities of cultural heritages and the indicators indicated closed correlations with humidity conditions in indoor of facilities.

• 대한조선학회지
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• 제2권1호
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• pp.15-19
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• 1965

The stability curves are very important data to decide the seaworthiness of all kinds of ships among waves. Both statical and dynamical stability curves on a rectangular coordinate system have broadly been handled at ship yards or at the government concerned, up to data. As concerns a method of obtaining a statical stability curve on polar coordinate system, the papers were presented once. Also, it is of use to research the dynamical stability curve on polar coordinate system. Author treated of the dynamical stability curve by four different methods, and tried to set the stability indicator inboard, adopted those proposals, in order to give some aids for good navigation on the sea. Fig. 1. shows a drawing method in case of the position of centre of buoyancy can be previously pointed out on the line corresponding to its inclination. Fig. 2. shows a method used a statical stability curve on polar coordinate. Fig. 3. shows a method obtained by the most simplified means. Fig. 4. shows dynamical stability curve made by geometrical expression method, instead of dynamical lever. A simple stability indicator which was mechanized above characteristics is attempted by author as shown Fig. 5 and Fig.6. It is demanded at hand, for more advanced improvement of such indicator.

• The Korean Journal of Pain
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• 제7권1호
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• pp.49-52
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• 1994

Measurement of skin temperature is most frequently used to evaluate effect of sympathetic block. Sticker type skin temperature indicator, $ProChecker^{(R)}$, uses metamocolor, which changes the darkness of the color by giving and taking of electrons in response to temperature. We examined the accuracy of this skin temperature indicator in pain clinic patients who were treated with stellate ganglion block. Ten minutes before, and 10~20 minutes after stellate ganglion block, skin temperature on both dorsum of hand were measured using both $ProChecker^{(R)}$ and thermography concurrently. The results showed that skin temperature measured by $ProChecker^{(R)}$ was feasible, in correlation to thermography. Sticker type temperature indicator ($ProChecker^{(R)}$) is concluded as a useful monitor of skin temperature during nerve block in outpatient clinics.

• 전기학회논문지
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• 제66권1호
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• pp.229-236
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• 2017

The railway has recently been expanded with the phase of the future transportation. Accordingly, using the new technologies such as smart devices and LTE-R, the needs for reducing operational costs and improving passenger services have emerged. To realize these needs, the government is pushing to build the dedicated wireless network for the railway systems. In this paper, the shunting route indicator was selected for this study because it has the best effect for the wireless system removed lots of wired cables. And the wireless shunting route indicator applied with LTE-R technology was developed to replace the current wired control system. The functional goal(the wireless control function applied LTE-R), the performance goal(less than 300ms for transferring the control information), and the reliability goal(over the 100,000 hours for MTBF) were set, and these goals were achieved and demonstrated through the test and validation.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.350-350
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• 2017

저수지의 설계홍수량 산정 시 인근의 기상관측 자료를 활용하고 있으나 인근에 기상관측 자료가 없거나 저수지 배후 유역이 큰 경우에는 단일 기상관측 자료를 이용하기에는 한계가 있다. 따라서 실무적으로 지점별 기상관측소의 자료를 이용하여 설계홍수량을 산정할 때에는 각 관측소 자료를 이용하여 확률강우량을 산정하고 Thiessen 가중평균을 한 후 면적우량환산계수 (ARF)를 곱하여 사용하고 있는데, Thiessen 방법의 경우 방법이 간단하지만 지형 고도 효과는 무시되고 우량계의 지배면적에 의한 우량계의 분포 상태만을 고려하게 된다. 그러므로 설계홍수량 산정시 사용되는 Thiessen 방법은 공간적 불확실성을 내포하고 있고, 특히 소규모 저수지의 설계홍수량을 산정하는 경우에는 저수지 유역의 국소적인 특징을 나타내기 어렵다. 본 연구에서는 설계홍수량 산정 시 저수지 위치에 해당하는 확률강우량의 공간적 불확실성을 평가하기 위하여 SIS(Sequential Indicator Simulation) 방법을 이용하였다. SIS 방법은 Kriging 기법과 마찬가지로 베리오그램으로부터 얻어지는 공간적 상관관계를 기반으로 하고 있는 방법으로 Kriging 기법과 달리 공간분포의 국소적인 특성을 평가할 수 있다는 장점을 가지고 있다.

• 한국토양비료학회지
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• 제48권5호
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• pp.379-383
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• 2015

Indicators of environmental conditions describe the state of the environment and the quantity and quality of natural resources. This study deduced the evaluation items to assess each sub-indicator for agricultural water quality and conducted the surveying using the Delphi method based on agricultural water quality experts. Considering its importance, environmental, state, and management indicators showed that state indicator such as COD concentration for surface water and $NO_3-N$ concentration for groundwater was ranked as first and followed by amount of fertilizer. Its indicators were correlated with state and environmental indicators in surface water and groundwater. The best management indicators were calculated to assess the agricultural surface water and ground water quality. The indicator could be used in established policies for management and conservation of water resources.

• 국제지역연구
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• 제12권3호
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• pp.171-194
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• 2008

이 논문은 1980:1-2006:3분기간 자료를 이용하여 한국의 광의통화(M2)와 광의유동성(L)에 대한 개방형 화폐수요함수를 계절성과 외환위기를 고려한 공적분 검정 및 오차수정모형으로 분석하였다. 실증 분석결과 한국의 광의통화(M2)와 광의유동성(L)은 실질소득, 회사채수익률, 인플레이션 불확실성, 실질실효환율, 환율불확실성, LIBOR금리간 공적분 관계가 존재하여 이들 변수들 사이에 안정적인 장기균형관계가 성립하는 것으로 나타났다. 또한 광의통화(M2)변동은 환율불확실성 변화에 가장 크게 의존하며 LIBOR금리 변화와 미세하지만 실질실효환율 및 소득변화에 의해 영향을 받는 것으로 나타났다. 광의유동성(L)의 경우에는 환율불확실성의 변화에 가장 크게 의존하며 광의유동성 수요와 실질소득변화에 의해서도 영향을 받는 것으로 나타났으나, 회사채수익률, 인플레이션불확실성, 실질실효환율, LIBOR금리 등의 변화에 의해서는 영향을 받지 않는 것으로 밝혀졌다.

• 한국환경과학회지
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• 제30권1호
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• pp.29-43
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• 2021

This study analyzed the status of climate-change indicator plants native to the main islands of the Korean peninsula, while elucidating their distribution characteristics. Information on flora from over 129 island locations, comprising more than 100 species of native plants, was collected, compiled into a database, and utilized as raw data. The distribution of 193 climate-change indicator plants was confirmed. The distribution area of broadleaf evergreen trees and ferns, including Mallotus japonicus and Cyrtomium falcatum, was relatively wide. In contrast, the distribution of common northern plants such as Corydalis turtschaninovii and Malus baccata was limited. If global warming persists, northern plant distribution is expected to decrease rapidly in the Korean Peninsula island region, while the northern limit line of the southern plants is expected to migrate further northward. During this process, it is likely that the plant congregation structure and species diversity within the island region will change dynamically. In this study, comparative analyses between species and regions were conducted by assessing the relative frequency of their occurrence, and six types of botanical geographic distribution patterns were noted.

• 공학교육연구
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• 제24권3호
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• pp.32-41
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• 2021

The purpose of this study is to develop indicators to establishing the education system, focusing the curriculum in each department of H University for quality management of the curriculum. The indicator was developed based on previous studies and cases studies of other universities, and the validation of them was confirmed by the Delphi survey method. The Delphi surveys were conducted by two times, and 16 and 15 people participated for the first and second survey, respectively. We derived the following major results through developing the indicator. First, in order to conduct an education inspection of major courses, , , , , and are required. Second, the checking factors should be evaluated based on the contents in each stage, and can be regarded as a core activity in the curriculum. Accordingly, the checking factors becomes the basis for the establishment of the indicator to establishing the education system, and the indicator can be an expression method that represents the basis data for determining the factors to be evaluated.

• 한국농공학회논문집
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• 제64권2호
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• pp.71-83
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• 2022

In this study, an indicator and assessment system for evaluating the monthly hydrological cycle was prepared using simple factors such as the landuse status of the watershed and topographic characteristics to the dynamic water balance model (DWBM) based on the Budyko framework. The parameters a1 of DWBM are introduced as hydrologic cycle indicators. An indicator estimation regression model was developed using watershed characteristics data for the introduced indicator, and an assessment system was prepared through K-means cluster analysis. The hydrological cycle assessment system developed in this study can assess the hydrological cycle with simple data such as land use, CN, and watershed slope, so it can quickly assess changes in hydrological cycle factors in the past and present. Because of this advantage is expected that the developed assessment system can predict changes in the hydrological cycle and use an auxiliary tool for policymaking.