• Title, Summary, Keyword: Conversion factor

Search Result 891, Processing Time 0.047 seconds

Estimating the Soil Volume Conversion Factor of Weathered Ground with Consideration of Field Situations

  • Jin, Kyu-Nam;Cho, Gye-Chun;Lee, Jung-Min;Ryu, Hee-Hwan;Park, Sung-Wook
    • LHI Journal of Land, Housing, and Urban Affairs
    • /
    • v.2 no.2
    • /
    • pp.145-155
    • /
    • 2011
  • It is very important for successful construction to estimate the soil volume conversion factor of domestic weathered ground accurately and reasonably. However, it is very difficult to quantify the weathering degree of weathered ground at the field, so that the soil volume conversion factor used in Korea is often dependent upon the standard of foreign countries. Besides, the soil volume conversion factor of domestic weathered ground has been rarely studied and the use and accuracy of the soil volume conversion factor have been questioned persistingly. This study suggests a simple but robust method for estimating the soil volume conversion factor and measuring the weathering degree reasonably, and attempts to establish the utilization of a soil volume conversion factor measurement system based on experimental and analytical results. We made relationship between electrical resistivity and weathering degree presented from weathering index obtained through laboratory tests using field samples, and an estimation method of in-situ weathering degree for granites and a calculation method of soil volume conversion factor using electrical resistivity. And also, we suggested the photogrametry measurement-equipment system for measuring the volume of cargo box and the application plan of stand equipment and RFID for calculating the earth volume and distinguishing buggies in order to design the measurement system for soil volume conversion factor applicable to the field. Ultimately, the Weathered Earth-work Management Program (WEMP) was developed, so field managers may easily obtain the information about earth volume and soil volume conversion factor at the weathered ground.

Comparison Actual Conversion Factor with Estimated Conversion Factor by Fee Adjustment Model Reflecting Health Service Volume (서비스양을 고려한 수가 결정모형에 의한 추정 환산지수와 실제 환산지수의 비교)

  • Han, Ki Myoung;Cho, Min Ho;Lee, Soo Jin;Chun, Ki Hong
    • Health Policy and Management
    • /
    • v.23 no.4
    • /
    • pp.343-348
    • /
    • 2013
  • Background: Price control alone may not successfully restrain growth in health expenditures. This study aimed to propose fee adjustment model suitable for Korea reflecting health service volume and to clarify applicability of the model by comparing actual conversion factor with estimated conversion factor from simulation of this model. Methods: Fee adjustment model was developed based on Alberta's fee adjustment formula in Canada and 7 alternatives were assessed according to diversely applied parameters of the model. Results: Estimated conversion factors of the tertiary care hospital and the hospital were lower than actual conversion factors, since the utilization of heath service has been increased. However, there was no big difference between estimated conversion factors and actual conversion factors of the general hospital and the clinic. Eventually this fee adjustment model could estimate proper conversion factor reflecting health service volume. Conclusion: This model may be applicable to the mechanism as determining conversion factor between insurer and provider via negotiation and controling growth in health expenditures.

A Study on the Mode Conversion of Control in the Single Phase Switched Reluctance Motor (단상 SRM의 제어 모드 변환에 관한 연구)

  • Go, Sung-Chul;Ahn, Joon-Seon;Kim, Sol;Lee, Ju
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.635-636
    • /
    • 2006
  • A pulse with modulation(PWM) that keeps a constant angle of dwell and adjust duty ratio is a good method to control a speed of SRM. And a method of one pulse control is proper a operation on range of high speed in SRM for a good energy efficiency. Because PWM method is more safety than one pulse method, conversion of those is best choice according the speed range. So, some algorithm is need for smooth conversion of the mode of control. This paper presents a factor of conversion that proper the conversion of control mode between PWM and one pulse method This factor is from estimation of torque and proper at the variable range of conversion and show the better conversion characteristic than constant factor of conversion.

  • PDF

Conversion Function and Relationship of Loss of Load Expectation Indices on Two Kinds of Load Duration Curve (두 종류의 부하곡선에 관한 공급지장시간기대치(LOLE)의 상호 변환관계성)

  • Lee, Yeonchan;Oh, Ungjin;Choi, Jaeseok;Cha, Junmin;Choi, Hongseok;Jeon, Donghun
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.66 no.3
    • /
    • pp.475-485
    • /
    • 2017
  • This paper develops a conversion function and method transforming from daily peak load curve used $LOLE_D$ [days/year] to hourly load curve used $LOLE_H$[hours/year]and describes relationship between $LOLE_D$ [days/year] and $LOLE_H$ [hours/year]. The indices can not only be transformed just arithmetically but also have different characteristics physically because of using their different load curves. The conversion function is formulated as variables of capacity and forced outage rate of generator, hourly load daily load factor and daily peak load yearly load factor, etc. Therefore, the conversion function (${\gamma}={\varphi}$(.)) can not be simple. In this study, therefore, the function is formulated as linear times of separated two functions. One is an exponential formed conversion function of daily load factor. Another is formulated with an exponential typed conversion function of daily peak load yearly load factor. Futhermore, this paper presents algorithm and flow chart for transforming from $LOLE_D$[days/year] to $LOLE_H$[hours/year]. The proposed conversion function is applied to sample system and actual KPS(Korea Power System) in 2015. The exponent coefficients of the conversion functions are assessed using proposed method. Finally, assessment errors using conversion function for case studies of sample system and actual system are evaluated to certify the firstly proposed method.

A New Method for Lateral Force Calibration in Atomic Force Microscope (원자현미경(AFM)에서 마찰력 측정을 위한 새로운 보정 기술 연구)

  • Yoon Eui-Sung;Kim Hong Joon;Wang Fei;Kong Hosung
    • Tribology and Lubricants
    • /
    • v.21 no.5
    • /
    • pp.221-226
    • /
    • 2005
  • A new calibration method for exact measurement of friction force in atomic force microscope (AFM) is presented. A new conversion factor involves a contact factor affected by tip, cantilever and contact stiffness. Especially the effect of contact stiffness on the conversion factor between lateral force and lateral signal is considered. Conventional conversion factor and a new modified conversion factor were experimentally compared. Results showed that a new calibration method could minimize the effect of normal load on friction force and improve the conventional method. A new method could be applied to the specimens with different physical properties.

A Study on the discriminating of the hospitals based on the efficient insurance conversion factor by AHP and DEA (효율적 건강보험수가에 기반을 둔 병원 그룹화에 관한 연구 -AHP와 DEA를 이용한 분석-)

  • O, Dong-Il
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.10 no.6
    • /
    • pp.1304-1316
    • /
    • 2009
  • This study is for the pursuit of the basic application of the efficient conversion factor in the fee contract. This aims to investigate the effects of DEA efficiency index and conversion factors to identify and group the 60 hospitals with intern and residents education. To achieve the aims, AHP was used to select the inuput and output variables for DEA. It was found that the more inefficient in the technical and scale side, the higher the conversion factors were. Conversion factor and DEA efficiency index can be used very effectively to group and discriminant hospitals into a specialized general hospital and a general hospital. Even if the variables used to calculate DEA efficiency are applied to discriminant analysis, The conversion factor and DEA efficiency index have a significant power to make a function modeling. So, if we can make a more conclusive proof based on the large number samples, We can imagine to introduce a efficiency concept in the insurance fee contracts about a conversion factor in Korea Health Insurance System.

A study on the luminance-to-illuminance conversion factor in the roadway lighting design (도로조명 설계에 있어서 휘도-조도 환산계수 적용에 관한 검토)

  • 주윤석;이동호;여인선;지철근
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
    • /
    • /
    • pp.151-155
    • /
    • 1998
  • In this paper it is examined the validity of luminance-to-illuminance conversion factor in the roadway lighting design. Luminance and illuminance distribution patterns were measured to yield the calculated conversion factor on the newly-constructed highway, and this value was compared to the conversion factor commonly used. We found that some discrepancy might exist between them due to difference in the values between the luminance yield factor and the coefficient of utilization. Therefore this fact must be fully understood in the roadway lighting design process.

  • PDF

A New Experimental Technique for Calibration of Frictional Force in Atomic Force Microscopy (원자 현미경에서 마찰력 측정을 위한 새로운 실험 기법)

  • Choi, Duk-Hyun;Hwang, Woon-Bong;Yoon, Eui-Sung
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.28 no.12
    • /
    • pp.1906-1913
    • /
    • 2004
  • A new method has been proposed for the calibration of frictional forces in atomic force microscopy. Angle conversion factor is defined using the relationship between torsional angle and frictional signal. Once the factor is obtained from a cantilever, it can be applied to other cantilevers without additional experiments. Moment balance equations on the flat surface and top edge of a commercial step grating are used to obtain angle conversion factor. Proposed method is verified through another step grating test and frictional behavior of Mica.

A New Experimental Technique for Calibration of Frictional Force in Atomic Force Microscopy (원자 현미경에서 마찰력 측정을 위한 새로운 실험 기법)

  • Choi, Duk-Hyun;Hwang, Woon-Bong;Yoon, Eui-Sung;Kim, Joon-Won;Kim, Dong-Sik
    • Proceedings of the KSME Conference
    • /
    • /
    • pp.846-851
    • /
    • 2004
  • A new method has been proposed for the calibration of frictional forces in atomic force microscopy. Angle conversion factor is defined using the relationship between torsional angle and frictional signal. Once the factor is obtained from a cantilever, it can be applied to other cantilevers without additional experiments. Moment balance equations on the flat surface and top edge of a commercial step grating are used to obtain angle conversion factor. Proposed method is verified through another step grating test and frictional behavior of Mica.

  • PDF

The Sense of Touch of Man-made Leather (인조피혁의 촉감평가)

  • 이정순;신혜원
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.24 no.2
    • /
    • pp.277-285
    • /
    • 2000
  • The purpose of this study was to quantify the relationship between the sense of touch and mechanical properties of man-made leather. The first was to develop the five conversion equations which convert mechanical properties of man-made leather into five factor scores, which express five factors of the sense of touch(surface property, stretchiness, thickness & weight, thermal property(warmth & coolness), and moisture property(sticky & clingy)). The second was to develop the conversion equation which converts five factor scores into score of the sense of touch. Five factor scores were predicted by the following mechanical properties; surface property factor by log2HB and (log2HB)2, stretchiness factor by logEM, thickness & weight factor by logT, log2HB, logW, thermal property factor by logT, logHB, logSMd, and moisture property factor by logMMD, RC, RC2, (logEM)2, RT2. Subsequently, these five factor scores were converted into score of the sense of touch. The predictive abilities of the developed equations were satisfied.

  • PDF