• 한국조사연구학회지:조사연구
• /
• 제5권1호
• /
• pp.79-91
• /
• 2004

아파트 가격을 측정하기 위해 일반적으로 사용되는 방법은 특정 단지 특정 평형아파트 세대의 상한가와 하한가를 조사하는 방법이다. 그런데 이러한 조사방법에 의해 얻어진 데이터를 이용하여 아파트 세대 당 평균 매매가를 추정하면 편향된 추정값을 얻게 된다는 문제가 생긴다. 본 연구에서는 이러한 문제를 해결하기 위해 보다 합리적인 대안으로서 새로운 측정방법을 제안한다. 새로운 측정방법은 특정 단지 특정 평형 아파트 세대의 상한가와 하한가 외에 추가적으로 일반거래가도 함께 조사하는 방법이다. 마지막으로 부동산 중개업자들을 대상으로 한 설문조사 분석을 통해 새로 제안하는 측정방법이 현실적으로 적용 가능하고 타당성 있는 방법임을 보였다.

• 자원ㆍ환경경제연구
• /
• 제10권4호
• /
• pp.495-513
• /
• 2001

We investigate a practical method of calculating the impact of multiple domestic energy price change on the final demand, production, the export and import change, the change in the balance of payment of Korean economy. By combining an existing computable general equilibrium (CGE) model with the traditional input-output analysis with two additional assumptions on the price behavior, we provide a cost-effective method of analyzing the impact of multiple energy price changes on the domestic economy. The energy price shock we used in this paper is 0.127% increase weighted by the sectoral productions. The total impacts on price level and GDP are 1.258% and -0.940%, respectively. The impact on the total output (GDP and intermediate goods) is about -1.580%.

• 경제분석
• /
• 제17권1호
• /
• pp.131-168
• /
• 2011

본 논문의 과제는 1907~39년에 식민지 조선의 8개 도시(서울, 부산, 대구, 목포, 평양, 신의주, 원산, 청진)와 이를 종합한 전 도시 소비자물가지수를 추계하는 것이다. 물가지수 추계를 위한 소비재 가격 자료는 『조선총독부통계연보』에 의거하였으며, 거기에 포함되지 않은 주거비와 서비스 가격은 임금이나 공공요금 단가 등을 이용하여 보완하였다. 이들 가격에 대응하는 가중치는 재화흐름법(commodity flow method)에 의거하여 추정된 민간소비지출의 구성비를 이용하였다. 소비자물가지수의 작성은 현재와 같이 기준년을 5년마다 개편하는 라스파이레스(Laspeyres) 지수 방식으로 구했으며, 총 지수와 함께 12대 비목별 지수도 구했다. 그리고 서울의 경우에는 1907~2009년에 걸친 장기지수(총 지수 및 5대 비목별 지수)를 제시하였으며, 이를 통해 소비자물가가 지난 100년 간에 걸쳐 어떻게 추이했는지를 보였다. 본 논문이 추계한 소비자물가지수는 해방 전의 소득이나 지출에 관한 명목금액을 현재 가치로 환산하는 데 이용될 수 있다.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2006년도 춘계학술대회 논문집
• /
• pp.291-292
• /
• 2006

Currently A demand of high precision workpiece is increasing in industry. At present, roundness measuring machine using Air bearing, coordinate measuring machine that are used from measurement station. but these machines will not be able to apply to In-line process. because of like these machine's price are very expensive and measurement time is long. also, the complexity of conventional roundness measurement method based on fourier transform, it makes difficult to development analysis program. This work present new architecture of a Out-diameter measuring system fur analysis of roundness of product. In this system, the influence of table motion errors is minimize by using two LVDT sensor and knife edge contact tip. We are produce a test machine and make an experimenter on Out-diameter of test bearing. The measurement result compared with roundness measuring machine.

• 한국항해항만학회지
• /
• 제28권4호
• /
• pp.323-331
• /
• 2004

This paper introduces a novel approach that can provide the three dimensional information about the movement of a spreader by using two CCD cameras and a laser distance measuring unit in order to derive ALS (Automatic Landing System) in the crane used at a harbor. So far a kind of 2D Laser scanner sensor or laser distance measuring units are used as comer detectors for the geometrical matching between the spreader and a container. Such systems provide only two dimensional information which is not enough for an accurate and fast ALS. In addition to this deficiency in performance, the price of the system is too high to adapt to the ALS. Therefore, to overcome these defects, we proposed a novel method to acquire the three dimensional spreader information using two CCD cameras and a laser distance measuring unit. To show the efficiency of proposed method, real experiments are performed to show the improvement of accuracy in distance measurement by fusing the sensory information of the CCD cameras and a laser distance measuring unit.

• 한국정밀공학회지
• /
• 제18권6호
• /
• pp.133-140
• /
• 2001

This paper suggests another system for a cutting force measuring tool in a milling process. Generally, tool dynamometer is taken into account for the most appropriate cutting force measuring tool in the analysis of cutting mechanism. However, high price and limited space make it difficult to be in-situ system for controllable milling process. Although an alternative method using AC current of servo-motor has been suggested, it is unsuitable for cutting force control because of small upper frequency limit and noise. The cutting force measuring system is composed of two load cells placed between the moving table bracket and the nut flange part of ballscrew. It has many advantages such as low cost and wide range measurement than tool dynamometer because of the built-in moving table and the low cost load cell. The static and dynamic model of the measuring system using imbeded load cell is introduced. Various Experiments are carried out to validate both models. By comparing the cutting forces from a series of end milling experiments on the tool dynamometer and the system developed in this paper, the accuracy of the cutting force measuring system is verified. Upper frequency limit is measured by the experiment of dynamic characteristics.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2008년도 정기학술발표대회 논문집
• /
• pp.540-545
• /
• 2008

본 연구의 목적은 물가변동에 따른 실적공사비 등락률 산출 과정의 문제점과 개선방안을 제시하고자 수행되었다. 이 연구를 수행하기 위해서, 실적공사비 내역이 포함된 현장을 표본으로 실적공사비적용 방식 및 품셈적용 방식으로 물 가변동률을 산출하여 문제점을 분석하고 물가변동금액 산출에 대한 개선방안을 제안하였다. 이에 따른 연구의 결과는 다음과 같다. 1) 전체공사 내역 중 실적공사비 단가로 작성된 내역에 대해선 품셈 방식을 준용하여 물가변동 부분을 산출하는 것이 더 적정한 것으로 나타났다. 2) 산출방식에 혼선이 없도록 관련 법령 및 규정에서의 실적공사비 등락률 산출부분을 품셈으로 풀어 산정하도록 일부개정이 이루어져야 하는 것으로 나타났다.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2003년도 ICCAS
• /
• pp.49-52
• /
• 2003

Two types of ozone monitors using UV absorption method were tried in consideration of cost of the monitor and precision in measuring. The high concentration ozone monitor for high concentration real time ozone monitoring from ozone generator was composed of a low pressure mercury lamp as UV source, a photo multiplier tube as UV detector and signal processing unit for the most part. This structure could be very useful for low price high concentration ozone monitor due to simple system structure and fairly good monitoring characteristics. The developed system showed good linear output characteristics to ozone in the measuring concentration range of 0.05 and 2 wt.%. For accuracy ambient ozone monitoring in ambient in ppm level, the system composed of a high power pulsed xenon lamp as UV source, an optical spectrometer with a high sensitivity linear CCD array as UV detector and signal processing unit in brief speaking was proposed our study for the first time in the world. The developed system showed good linearity and sensitivity in relative low measuring range between 10ppm and 10,000ppm, and showed some feasibility of high resolution ozone monitor using CCD array as photodetector.

• 농촌계획
• /
• 제22권3호
• /
• pp.97-106
• /
• 2016

The study attempts to estimate the recreational benefits of Chilgap multi-purpose reservoir using the on-site survey sample of 130 visitors. The individual travel cost method is used for measuring the recreational benefits of Chilgap multi-purpose reservoir and a zero-truncated negative binomial model is used to elicit the travel demand function. The price elasticities of visit demand are ranged from 0.29 to 0.39. Recreational benefits are ranged from 119 to 156 thousand won per visit and are ranged from 292 to 383 thousand won per annual. When the number of annual visitors to Chilgap reservoir is appled, then the recreational benefits are ranged from 2.7 to 3.6 billion won. This study could contribute to the advancement of post-construction evaluation in the public construction field similar to Chilgap reservoir.

• 한국수소및신에너지학회논문집
• /
• 제28권3호
• /
• pp.279-286
• /
• 2017

Korea government decides to build one hundred hydrogen refueling stations (HRS) until 2020 and tries to disseminate HRS and boosts HRS market in korea. Naepo HRS in chungnam province has been operated for last one full year of 2016 and recorded 2,520 times full charge for the hydrogen fuel cell powered vehicles and total 6,016 kg hydrogen fueling for the 25 units of hydrogen fuel cell powered vehicles. Raw fuel of hydrogen from tube trailer measured by pressure, converting into weight of hydrogen and shows 19.6% surplus with final charged weight by dispenser. This result is caused measuring errors. Measured charged errors between dispenser and Mass flow meter was determined 13.13%.