• 기술혁신연구
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• 제20권1호
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• pp.1-15
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• 2012

우리나라는 1983년에 절충교역 제도를 도입하여 국방 전력증강의 효율적 수단으로 활용하여 왔다. 그런데 절충교역은 계약체결이 획득기술에 대한 가치평가 결과를 근거로 이루어지기 때문에 국외업체와의 협상 등 업무과정상 지연될 가능성이 존재한다. 절충교역 계약체결이 지연되면 무기체계 구매사업이 늦어져 국방 전력증강에 심각한 악영향을 주게 된다. 따라서 본 연구에서는 절충교역 계약 과정, 특히 계약 소요기간에 영향을 미치는 요인들을 통계적으로 분석하여 소요기간을 결정하는 요인을 규명하고자 하였다. 영향 요인으로는 국외업체 국적, 사업진행 형태 (경쟁/단독 입찰), 사업 특성 (최초/계속 사업), 최초 제안기술의 수, 국내 무기체계 분야별 국방과학기술수준, 기본사업 규모 등 6개를 고려하였다. 가설 검증은 절충교역 계약이 체결된 25개 사업을 대상으로, 상관분석 및 다중회귀분석을 통하여 이루어졌다. 상관분석 결과에 의하면, 기본사업 규모, 최초 제안기술의 수, 사업 특성 등이 종속변수인 절충교역 계약 기간과 양의 상관관계를 갖고 있음을 알 수 있었다. 다중회귀분석 결과에서는 기본사업 규모와 사업진행 형태가 절충교역 계약 소요기간에 유의한 영향을 미치는 것으로 나타났다.

• 한국물환경학회지
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• 제25권4호
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• pp.573-579
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• 2009

The performance of Rainfall-Runoff Forecasting System (RRFS), the watershed management model for the Geum river basin, is evaluated based on the agreement between the simulated and observed hydrographs and the behavioral characteristics of the flow-duration curves. As a result, the simulated hydrographs are well agreed with the observed ones except high flow discharges. It is inferred that most of the errors in the simulated hydrographs are due to the misestimation of agricultural water use in $2^{nd}$ quarter and the discrepancy of the peak discharges in $3^{rd}$ quarter. It is however judged that RRFS would give the reliable runoff hydrographs from the point of view of continuous model application. And simulated flow-duration curves and flow-duration coefficients are also similar to the observed ones except flood flow region. From the above result it is confirmed that the construction of Yongdam dam improves the state of flow-duration curve at the Gongjoo station.

• 한국중재학회지:중재연구
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• 제23권1호
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• pp.55-84
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• 2013

There should be an arbitration agreement between concerned parties in order to resolve a dispute through arbitration. The arbitration procedures, including the selection of the arbitrator and the adjudicative rights of the arbitrator, are based on the arbitration agreement. In other words, the arbitration procedure and adjudication can be carried out within the boundaries of the arbitration agreement. Traditionally, the Doctrine of Separability of the arbitration agreement has been acknowledged in order to emphasize its importance and to clearly separate it from the contract. Today, when the Doctrine of Separability of the arbitration agreement is well established, overemphasizing this separability could hamper its effectiveness and the autonomy of the parties. Moreover, arbitration agreements in the past were required to be written, clarifying the existence of the agreement and determining the scope of its validity. Further, an arbitration agreement was considered as narrowly as possible. However, since arbitration has become a generalized resolution for disputes, the formal or content requirements should be reconsidered. In terms of validity, the subjective and objective scope should necessarily be extended as a means to resolve disputes related to an arbitration agreement and reduce the resolution cost and duration. Under this perspective, the arbitration theory should now focus on arbitration agreements rather than the place of arbitration. We should break from the nationalistic view, which understands that the arbitration system is a part of the national legal system and that arbitration is allowed solely by permission of the nation. Instead, we should extensively reinterpret the subject of arbitration agreement and its range of effects so that disputes can be resolved between the concerned parties under a single procedure and norm, a necessary step forward. Moreover, in spite of the positive contribution and role of the New York Convention toward the establishment and development of the international arbitration system, there should be an effort to overcome its deterioration. As mentioned in the recommendations regarding the interpretation of the arbitration agreement in the New York Convention in 2006, we should begin by striving to match the Convention as a means of interpretation with the changes of the twenty-first century. Ultimately, we should meet the demands of the new era through amendments to the Convention.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1998년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Spring 1998
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• pp.421-435
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• 1998

An empirical formula for estimating duration magnitude(MD)is determined by analyzing 619 epicentral distance-duration data set, obtained from earthquakes of 1989-1998 recorded at the KMA network. Based on two assumptions: 1) observed signal duration decreases with increasing epicentral distance, and 2) seismographs of KMA are set at low-gain and therefore inclusion of sensitivity correction term in the equation is not necessary, scaling predicted duration at epicenter to Tsuboi's local magnitude yielded the duration magnitude equation: MD =2.0292$\times$log$\tau$＋0.00123Δ-1.4017 for 1/0$\leq$ML$\leq$5.0, where $\tau$is total signal duration(sec)and Δis epicentral distance(km). Event by event comparison of ML values against MD estimates for t152 events shows that for events having a same ML the difference in MD estimates reaches as high as 1.1 magnitude units. So, to test the usefulness of the duration magnitude equation, we have calculated ML-MD relations by which duration magnitude estimates are converted to local magnitudes ("predicted" ML, say) which are then compared with the directly determined local magnitude values. Except for events with stations where duration is anomalously reestimates(predicted ML) which are in an agreement within a 0.2 magnitude units with the corresponding ML values. Although this study could gain some insights into magnitudes of the past events, we still need to re-examine all the observables in order to obtain more reliable and precise information about magnitude and hypocenter location. So we will pursue a new local-magnitude scaling, as well as refinement of the duration magnitude equation, starting soon with re-reading the amplitudes-arrival time records of (and hence relocating) 250+earthquakes of 1979-present recorded at the KMA network. Thus, with more reliable and precise earthquake parameters determined we would better understand the recent seismicity and related tectonic process within and adjacent region to the Korean peninsula.peninsula.

• Journal of Trauma and Injury
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• 제31권2호
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• pp.58-65
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• 2018

Purpose: Many doctors have difficulty in deciding the treatment duration in trauma patients to write in the casualty medical certificate. We tried to find a solution for this problem by using abbreviated injury scale (AIS). Methods: A total of 39 patients treated in our regional trauma center who requested an author to write treatment duration on casualty medical certificate from January 2014 to April 2017 were included. And the treatment duration was decided based on the PARK Formula (AIS). PARK Formula $(AIS)=(AIS{\times}2){\sim}([AIS{\times}2]+2)$ Results: Among 39 patients included and 36 (92.3%) had treatment duration on casualty medical certificate within the range of treatment duration calculated by PARK Formula (AIS). Compared to the PARK Formula (AIS), the mean value was 0.13 week (0.90 day) smaller. Comparing the treatment duration between Korean Medical Association (KMA) guideline and PARK Formula (AIS), only 22 patients (56.4%) showed agreement. The mean value was 1.02 week (7.18 days) smaller in KMA guideline. Conclusions: For the decision of the treatment duration in trauma patients, utilizing worldwide used AIS scoring system is very efficient. Using PARK Formula (AIS), doctors can document the treatment duration in the casualty medical certificate with ease. KMA should provide more practical 'treatment duration of each diagnosis in writing casualty medial certificate' for the doctors. We recommend PARK Formula (AIS) as a good alternative for KMA guide.

• Structural Engineering and Mechanics
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• 제9권1호
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• pp.69-88
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• 2000

A relatively simple model of a buried structure response to a surface loading that can simulate a possible opening and closure of a gap between the soil and the structure is presented. Analysis of the response of small and medium scale buried roof slabs under surface impulsive loading shows that the model's predictions are in fairly good agreement with the experimental results. Application of the model to a study case shows the relative influence of system parameters such as, the depth of burial, the arching coefficient, and the roof thickness, on the interface pressure and on the roof displacement. This model demonstrates the effect of a gap between the structure and the soil. The relative importance of including a gap opening and closure in the analysis is examined by the application of the model to a study case. This study results show that the deeper the depth of burial, the longer the gap duration, and the shorter the duration of the initial interface impact, while the higher the soil's shear resistance, the higher the gap duration, and the shorter the initial interface impact duration.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.135-142
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• 2007

The model to predict flow duration characteristics and performance for small scale hydro power(SSHP) plants is studied to analyze the effects of rainfall condition. One existing SSHP plant was selected and performance characteristics was analyzed by using the developed model. The predicted results from the model developed show that the data were in good agreement with operational results of existing SSHP plant. The results show that both the scale parameter and the shape parameter have large effects on the performance of SSHP sites. And also it was found that the model developed in this study can be a useful tool to predict the performance of SSHP sites.

• 대한기계학회논문집A
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• 제22권1호
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• pp.52-63
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• 1998

The impact programmer for impact test was designed and the impact analysis was conducted. The effects of the material and geometric parameters on the impact force and pulse shape were investigated. The impact characteristics were examined by experimental and finite element method. The impact test was conducted with free drop impact tester. The ABAQUS/Explicit 5.5 version was used for finite element analysis. The geometric parameters of the conical and dome type impact programmer were analyzed. The polyurethane impact programmers were fabricated and tested. The effects of the hardness and thickness of the impact programmer were studied. The peak acceleration and time duration of impact programmer have close correlation with the hardness, impact energy and thickness of the impactor. The experiment was good agreement with analytical predictions. The impact pulse shape generated with polyurethane impact programmer was half sine shape. The maximum impact force was proportional to impact energy. The impact acceleration was decreased with thickness of impact programmer. The maximum impact time duration level was about 2 msec.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.134-137
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• 2008

A methodology to evaluate the performance analysis for small hydropower at existing water treatment facilities has been studied. It consists of two main parts; flow duration function which can describe existing water treatment facilities and performance analysis to estimate the output characteristics of small hydro power plants. The output performance characteristics for Mi-ho reservoir, Sum-kang low dam, Sun-cheon sewage treatment plant and Nam-dong purification plant were analyzed, using developed model. According to the simulation results, the predicted data show that the data were in good agreement with measured results. Also, it was found that the developed model in this study can be used to analyze the output characteristics for small hydro power at existing water treatment facilities.

• International Journal of Precision Engineering and Manufacturing
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• 제4권4호
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• pp.32-38
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• 2003

An analytical model of the interference phenomena in the centerless grinding process is developed to investigate their effects on the roundness profile of a centerless ground workpiece. In this work, the regulating wheel and work-rest blade interferences are modeled as a single point contact. The grinding wheel interference is modeled as multiple points contact because material removal is determined by the duration of contact. The computer simulation results show good agreement with the experimental data. From this work, the existence and effects of the interference phenomena in the centerless grinding process are found.