• 한국산업융합학회 논문집
• /
• 제26권4_2호
• /
• pp.577-584
• /
• 2023

In this study, among the parts of oil vapor collectors that are already being produced, weaving wire brush automatic transplanters for oil vapor collectors for machine tools of the weaving fixing method, which are not automated due to the specificity of the process and are being produced manually, are developed and reliability is secured through performance evaluation. did Oil vapor collectors play an important role in removing air pollutants and improving air quality, and the coagulation effect of the collection technology is mostly due to brushes. In the experiment, an automatic transplanter was developed to automatically manufacture and produce the wire brush of the oil vapor collector, which is manufactured and used manually. For the experiment of the developed wire brush, an experimental chamber was built, and performance and durability were evaluated through the dust collection efficiency evaluation using the electrostatic precipitator method of contaminants (oil mist). Through this study, we intend to reduce the production time and unit cost of collectors and improve the environment at industrial sites.

• Journal of Advanced Marine Engineering and Technology
• /
• 제39권10호
• /
• pp.1062-1067
• /
• 2015

Floating architecture is a type of building that is geographically located on a sea or a river. It floats under the influence of buoyancy, and does not have an engine for moving it. Korea is a peninsula surrounded by sea except on the north side, so floating architectures have been mainly focused on two points: solving the issue of small territory and providing various leisure & cultural spaces. Floating architectures are expected to save energy effectively, if they use sea water heat, which is known to be clean energy with infinite reserves. To use sea water heat as the heat source and/or heat sink, this study proposes a model in which a sea water heat exchanger is embedded in the concrete structure in the lower part of the floating architecture that is submerged under the sea. Based on the results of performance evaluations of the sea water heat exchanger using CFD (computational fluid dynamics) analysis and mock-up experiments under various conditions, it is found out that the temperature difference between the inlet and outlet of the heat exchanger is in the range of $3.06{\sim}9.57^{\circ}C$, and that the quantity of heat transfer measured is in the range of 3,812~7,180 W. The CFD evaluation results shows a difference of 5% with respect to the results of mock-up experiment.

• Journal of Korea Artificial Intelligence Association
• /
• 제1권1호
• /
• pp.11-16
• /
• 2023

Accurate hospital case modeling and prediction are crucial for efficient healthcare. In this study, we demonstrate the implementation of regression analysis methods in machine learning systems utilizing mathematical statics and machine learning techniques. The developed machine learning model includes Bayesian linear, artificial neural network, decision tree, decision forest, and linear regression analysis models. Through the application of these algorithms, corresponding regression models were constructed and analyzed. The results suggest the potential of leveraging machine learning systems for medical research. The experiment aimed to create an Azure Machine Learning Studio tool for the speedy evaluation of multiple regression models. The tool faciliates the comparision of 5 types of regression models in a unified experiment and presents assessment results with performance metrics. Evaluation of regression machine learning models highlighted the advantages of boosted decision tree regression, and decision forest regression in hospital case prediction. These findings could lay the groundwork for the deliberate development of new directions in medical data processing and decision making. Furthermore, potential avenues for future research may include exploring methods such as clustering, classification, and anomaly detection in healthcare systems.

• 한국건설순환자원학회논문집
• /
• 제8권1호
• /
• pp.143-151
• /
• 2020

최근 자기치유 콘크리트의 연구가 활발히 진행되고 있으며, 구조물의 유지관리에 활용하기 위한 다양한 방법이 시도되고 있다. 하지만 자기치유 콘크리트의 기술적인 발전과는 달리, 성능을 평가하기 위한 방법은 불충분한 실정이다. 비록 표면관찰과 투수실험을 통해서 균열의 치유를 관찰하는 방법이 널리 실행되고 있지만, 현미경 관찰을 통한 표면관찰 방법은 국부적인 지점의 관찰은 전체적인 성능을 평가하기에는 불충분할 수 있으며, 투수실험의 경우에는 물질용출 및 점성으로 인한 손실을 고려해야 한다. 상기의 두 실험방법의 단점을 보완한 기체확산실험이 개발되었지만, 실제 치유가 발생한 시편을 대상으로의 검증은 이루어지지 않았다. 따라서 본 연구에서는 치유가 발생한 모르타르 시편에 대해 기체확산실험을 진행하였고, 기체확산실험에 의한 자기치유 평가의 적정성을 검증하였다.

• 콘크리트학회논문집
• /
• 제16권5호
• /
• pp.659-666
• /
• 2004

본 연구에서는 최근 국내에서 신기술 등으로 인증되어 활용되고 있는 보수재료 공법을 적용한 폭로시험체를 제작한 후, 해양환경 및 일반대기환경 하에서 장기폭로실험에 의한 정량적 폭로실험데이터를 확보함으로서 향후 성능 저하된 철근콘크리트 구조물의 보수재료 공법 성능평가 방법 및 품질관리기준 확립을 위한 기초자료를 제시하고자 하였다. 해양 및 일반대기환경 하에서 폭로재령 18개월까지 폭로실험을 실시한 결과 일부 보수공법에 있어서 표면피복재 및 단면복구재의 미세균열 부풀음, 박리현상과 보수경계부위의 균열 및 보수부위와 비보수부위의 전위차가 다소 발생하고 있는 것으로 나타났으며 향후 폭로시험체의 지속적인 평가 및 파괴에 의한 상세평가를 통하여 정량적인 폭로실험 데이터를 확보함으로서 보수재료 공법의 성능평가방법 및 품질관리기준 확립을 위한 기초 자료를 제시할 수 있을 것으로 판단된다.

• 한국화재소방학회:학술대회논문집
• /
• 한국화재소방학회 2008년도 춘계학술논문발표회 논문집
• /
• pp.251-254
• /
• 2008

The fact that the major cases of life casualties are from smoke in the fire accidents and the expected steep increase of skyscrapers, huge spaces, multiplexes and huge scaled underground spaces demand establishment of efficient smoke countermeasure. The field experiments on two high buildings of 20 stories and 21 stories are carried out to evaluate the field performance of pressure differential systems for smoke management and the results of experiments are presented.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
• /
• pp.565-570
• /
• 2001

Base shear and roof drift relation was acquired from experiment of 3 story ordinary moment resisting frame which was designed using gravity loads. To evaluate the dynamic behavior of the frame, analytical model was generated from experimental result. Dynamic analysis was performed using the analytical model subjected to earthquake ground motions with 500, 1000, and 2400 years of return period. And capacity spectrum method was adopted to find the performance points of the frame. Both dynamic analysis and CSM showed that the performance of the frame meet the life safety objectives suggested by FEMA 273 and ATC 40.

• 한국건축시공학회지
• /
• 제2권1호
• /
• pp.131-138
• /
• 2002

There is a problem to be solved for improvement of durability and safety supervision. When you do the waterproofing work of main concrete from the design stage, the material and method of construction need to be correctly applied to appropriate circumstance conditions. Epoxy have mostly been used for concrete water tank structure. Lately, lots of subjects on adaption of polyurea resin waterproofing and anticorrosive are under discussion. Then, we attempt to approach by evaluating and comparing every capabilities with another waterproofs in this study. Performance evaluation items include the adherence performance, the imprint of seal performance, temperature dependence performance, promotion weatherizing ability, Inner chemical performance. drinking water eruptive performance. Through the experiment analysis, we found that the polyurea resin waterproofing membrane is dominantly superior to other waterproofs. According to this study, we suggest the polyurea resin waterproofing membrane as a new waterproofing material for concrete structure.

• 전자공학회논문지CI
• /
• 제46권6호
• /
• pp.79-86
• /
• 2009

본 논문에서는 BIBD 기반의 멀티미디어 핑거프린팅 코드에 대한 공모코드들의 성능측정과 효용성 평가를 하여, 공모자 전체를 추적할 수 알고리즘을 제안한다. 공모코드들 중에는 "all 0" 또는 "all 1"의 비트 열이 생성되고, 또한 사용자의 핑거프린팅 코드와 동일한 공모코드, 비트반전 된 공모코드가 생성이 되어 공모자가 비공모자로 판정이 되거나, 비공모자가 공모자로 판정이 되는 경우가 발생한다. 따라서 공모자의 추적에 어려움이 발생한다. 본 논문에서 공모코드들의 성능측정 및 효용성 평가를 하기 위하여, 기존의 논문에서 부분적으로 처리되었던 평균화공격에 total solution으로 논리적 공모연산을 추가하여 실험하였다. 제안된 본 논문의 BIBD 기반의 멀티미디어 핑거프린팅 코드에 대한 공모공격 코드 생성의 성능측정, 효용성 평가의 실험을 통하여 공모자 추적이 100% 이루어짐을 확인하였다.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
• /
• pp.947-952
• /
• 2001

This study is to evaluate seismic performance of ordinary moment concrete frames. Base shear and roof displacement relations are obtained from the experiment of 3 story ordinary moment resisting concrete frame. The frame was designed only for gravity loads. The performance of the building is evaluated using capacity spectrum method. Five different seismic zones and three different soil types are considered. For each condition of seismic zone and soil type, ten earthquake ground motions are used to establish the demand spectrum.