• Title/Summary/Keyword: criteria of condition evaluation

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An Experimental Study on the Establishment of Indoor Noise Criteria - Focused on Korean Complex Building- (실내 소음기준 설정에 관한 실험적 연구 -동일 건물내 사업장을 중심으로-)

  • Lee, Tai-Gang;Kook, Chan;Jang, Gil-Soo;Kim, Sun-Woo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2008.04a
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    • pp.9-12
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    • 2008
  • There are many place of business in complex building, and recently claims of noise have increased in those buildings. It is most desirable reducing the noise problems to establish the noise criteria considering the noise source and the receiving place of business, which are derived from the dose-response of noise and results of the actual condition. The degree of response to the transmission noise could be changed with background noise level in the receiving stores. In this research, the subjective evaluation for three different background level in receiving place of business or rooms were investigated from subjective tests. The eight business sound source including aerobic music were used for the test.

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A Study on Evaluation Method of the HDA Test in Domestic Road Environment (국내도로 환경에서의 HDA 시험평가 방법에 관한 연구)

  • Bae, Geon Hwan;Kim, Bong Ju;Lee, Seon Bong
    • Journal of Auto-vehicle Safety Association
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    • v.11 no.4
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    • pp.39-49
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    • 2019
  • Autonomous vehicle is a car which drives itself without any human interaction. SAE provides technical definitions for autonomous and international standards for test evaluation. Accordingly, automobile industry is actively researching development and evaluation of various ADAS (Advanced Driver Assistance Systems), : representative technology of autonomous technology. Recently, ADAS is in the commercialization level such as ACC, LKAS, AEB, and HDA etc. And it also has issues about safety evaluation. The purpose of HDA in ADAS is reduced the driving load on highway. It has a function which can maintain lane keeping and control distance from forward vehicle. This function is evaluated to be useful for accident prevention. Therefore, this paper proposes the safety evaluation scenario of HDA, considering the domestic highway design criteria and the situation that may arise on the actual highway. We compared and analyzed the data acquired through simulation and actual vehicle test. And verified the reliability of the proposed safety evaluation scenario. The verified result is expected safety evaluation of HDA is possible even under the bad condition, which cannot be tested.

A Study on the Evaluation Management of Public Housing Architectural Competition using BIM (공공 공동주택의 BIM적용 설계 경기 평가관리에 한 연구 - BIM적용 가능 평가항목 선정을 중심으로 -)

  • Min, Byoung-Jik;Lim, Jae-Bok;Kim, Ju-Hyung;Seo, Jong-Won;Kim, Jae-Jun
    • Journal of KIBIM
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    • v.2 no.2
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    • pp.1-9
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    • 2012
  • In Korea, recently, efforts have been made to introduce BIM(Building Information Modeling) to housing complex projects. However, there have been several problems including excessive competition for building design and outcome-oriented evaluation due to a lack of clear evaluation criteria and poorly organized management process. Under this circumstance, the study surveyed opinions of project managers and conducted a pilot test to improve evaluation criteria of BIM-based design for housing complexes. The objective is to assess the level of BIM technology and its applicability, and to propose a list of reasonable evaluation criteria for better project management. First, the study examined the current condition of evaluation on the BIM-based housing complexes, and identified 15 preliminary items that might be suitable for application of BIM. Second, the study conducted a pilot test for the 15 items to determine their suitability for the level of BIM technology, clarity of the calculation process, and the extent of fulfilling information quality, and short-listed eight items for application of BIM. In particular, in the design concept stage, mostly 3D visual images and area-related items are suitable for BIM-based evaluation. Accordingly, formerly used items such as project cost, energy and environmental analysis, building structure, and facilities were deemed more relevant to the subsequent stages of basic design and its implementation.

Development of Seocho Borough Pavement Condition Evaluation Model based on Seoul Metropolitan SPI (서울시도 SPI를 활용한 서초구 도로포장상태 평가모형 개발)

  • Lee, Sang-Yum;Park, Mi-Youn;Kim, Kyoon-Tai
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.11
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    • pp.314-321
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    • 2016
  • Adapting the maintenance criteria of Seoul City pavement is not applicable for borough pavement due to differences between the pavement of Seoul city and the borough, such as priority of maintenance, traffic volume, thickness of pavement, and pavement deterioration rate by distresses. To develop an efficient and reasonable evaluation method of the Seocho borough pavement condition within a limited budget, this study suggested the borough pavement condition evaluation model based on the PMS (Pavement Management System) of Seoul Metropolitan SPI (Seoul Pavement Index). The SPI was modified to predict the remaining life and determine the proper maintenance method for the pavement in Seocho borough. This was suggested to reflect the rate of the designed performance life and field performance life of pavement as well as the pavement condition at the stage of the completion of construction. Primary variables, such as crack, rutting and IRI in the final model affect the overall performance life due to their even composition. Therefore, the suggested model considering the lowered criteria, design performance factor, and construction factor can be used for the more efficient maintenance of Seocho borough pavement.

A Note on Finding Optimum Conditions Using Mixture Experimental Data with Process Variables (공정변수를 갖는 혼합물 실험 자료를 활용한 최적조건 찾기에 관한 소고)

  • Lim, Yong B.
    • Journal of Korean Society for Quality Management
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    • v.41 no.1
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    • pp.109-118
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    • 2013
  • Purpose: Given the several proper models for given mixture components-process variables experimental data, we propose a strategy to find the optimal condition in which the performance of the responses is well-behaved under those models. Methods: Given the mixture experimental data with process variables, first we choose the reasonable starting models among the class of admissible product models based on the model selection criteria and then, search for the candidate models that are the subset models of the starting model by the sequential variable selection method or all possible regressions procedure. Good candidate models are screened by the evaluation of model selection criteria and checking the residual plots for the validity of the model assumption. Results: We propose a strategy to find the optimal condition in which the performance of the responses is well-behaved under those good candidate models by adopting the optimization methods developed in multiple responses surface methodology. Conclusion: A strategy is proposed to find the optimal condition in which the performance of the responses is well-behaved under those proper combined models. This strategy to find the optimal condition is illustrated with the example in this paper.

Evaluation of Slope Condition using Principal Component Analysis (주성분분석법을 이용한 사면 상태 평가)

  • Jung, Soo-Jung;Kim, Tae-Hyung;Kang, Ki-Min;Lee, Young-Jun
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.416-422
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    • 2010
  • Estimating condition of geotechnical structures are difficult because of nonlinear time dependency and seasonal effects. Measuring data of structure failure is highly variable in time and space, and a unique approach cannot be defined to model structure movements. Characteristics of movements are obtained by using a statistical method called Principal Component Analysis(PCA). The PCA is a non-parametric method to separate unknown, statistically uncorrelated source processes from observed mixed processes. Instead, since the "best" mathematical relationship is estimated for given data sets of the input and output measured from target systems. As a consequence, this method is advantageous in modeling systems whose geomechanical properties are unknown or difficult to be measured.

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A Study on Structural Performance by Condition Grade of Temporary Equipment (가설기자재 상태등급별 구조성능에 관한 연구)

  • Moon, Seong-Oh;Mo, Seung-Un;Youn, Ye-Bin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2020.11a
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    • pp.16-17
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    • 2020
  • The Temporary construction refers to the construction or dismantling of temporary structures installed for the construction of the main structure at the construction site, and the members constituting this temporary facility are called temporary equipment. Temporary equipment used in construction sites is mostly used products that are reused rather than new products, and it is necessary to consider performance degradation due to repeated use. This study is a preliminary study to develop the performance evaluation criteria applied to temporary equipment that is distributed and reused for secondhand. This study is to analyze the performance status of temporary equipment of used goods owned by rental companies by condition grade through performance tests.

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Construction of small hydropower facilities performance evaluation system (소수력 발전설비 성능평가 시스템 구축)

  • Kim, Youngjoon;Kim, Yongyeol;Cho, Yong;Ko, Jaemyoung
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.193.2-193.2
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    • 2010
  • Domestic hydroelectric power plants has been manufactured as the design condition by the demand. Hydraulic turbine power plants operating at appointed load shall be operate stable in terms of pressure, discharge, rotational speed and torque. A performance guarantees for hydro turbines shall be contain, as a minimum, guarantees covering power, discharge and specific hydraulic energy, efficiency, maximum momentary overspeed and maximum momentary pressure and maximum steady-state runaway speed, as well as guarantees related to cavitation. But, present in Korea, the absence of testing laboratories and technical criteria for the performance test of small hydropower degrades the efficiency of the domestic hydropower machines, and makes it difficult to objectively evaluate the performance of hydro turbine. Therefore We planned making a basis of performance test of small hydropower turbine by using our flowmeter calibration system the largest one in Korea. We planned the maximum measurable power of hydro turbine will be 200 kW in our system.

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Construction of small hydropower facilities performance evaluation system (소수력 발전설비 성능평가 시스템 구축)

  • Kim, Youngjoon;Cho, Yong;Ko, Jaemyoung
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.05a
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    • pp.206.2-206.2
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    • 2011
  • Domestic hydroelectric power plants has been manufactured as the design condition by the demand. Hydraulic turbine power plants operating at appointed load shall be operate stable in terms of pressure, discharge, rotational speed and torque. A performance guarantees for hydro turbines shall be contain, as a minimum, guarantees covering power, discharge and specific hydraulic energy, efficiency, maximum momentary overspeed and maximum momentary pressure and maximum steady-state runaway speed, as well as guarantees related to cavitation. But, present in Korea, the absence of testing laboratories and technical criteria for the performance test of small hydropower degrades the efficiency of the domestic hydropower machines, and makes it difficult to objectively evaluate the performance of hydro turbine. Therefore We planned making a basis of performance test of small hydropower turbine by using our flowmeter calibration system the largest one in Korea. We planned the maximum measurable power of hydro turbine will be 200 kW in our system.

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A Study on Clothing Purchasing Behavior of the Uzbekistan Students Staying in Korea(1) -The Clothing Wearing Condition and Factors Affecting on the Purchase Intention for Korean Fashion Products- (우즈베키스탄 유학생들의 의복 구매행동에 관한 연구(1) -의복 착용실태와 한국 패션제품 구매의도에 미치는 영향요인 분석-)

  • Lee, Okhee
    • Journal of Fashion Business
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    • v.23 no.1
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    • pp.25-36
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    • 2019
  • The purpose of this study is to offer a base line data to facilitate entrance of a Korean fashion company into the Uzbekistan market by conducting a survey of the Uzbekistan students in Korea. This is done in order to gather data on their clothes wearing condition and factors affecting the purchase intention for Korean fashion products. In this study, a survey was conducted to 260 Uzbekistan students in Korea. The results of the study were as follows: 1) Uzbekistan students bought clothes mainly from road shops and the Internet. They bought a lot of pants, shirts, jackets, jumpers, and preferred to wear black, white, blue, and red color. The dissatisfactory parts were shown in order of the width of trousers, the length of the sleeve, and the shoulder. The most unsatisfying products were the pants and T-shirt. 2) They considered the aesthetics of the fashion products evaluation criteria, the human source and the internet advertisement of the fashion information source, and the customer service of the store selection criteria. These students showed very favorable attitude towards Hallyu and Korea. In addition, their preference and purchase intention for KFP were high. 3) The level of satisfaction on 'quality', 'color', and 'care' of KFP were very high, but lowest on the 'size' and 'price' of the clothes. 4) It was revealed that the attitude toward Hallyu and Korea, the satisfaction and preference of KFP, and demographics have a significant impact on the intention toward purchasing fashion products.