• Annual Conference on Human and Language Technology
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• 2019.10a
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• pp.181-184
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• 2019

상호참조해결은 주어진 문서에서 상호참조해결 대상이 되는 멘션(mention)을 식별하고, 같은 개체(entity)를 의미하는 멘션을 찾아 그룹화하는 자연어처리 태스크이다. 한국어 상호참조해결에서는 멘션 탐지와 상호참조해결을 동시에 진행하는 end-to-end 모델과 포인터 네트워크 모델을 이용한 방법이 연구되었다. 구글에서 공개한 BERT 모델은 자연어처리 태스크에 적용되어 많은 성능 향상을 보였다. 본 논문에서는 한국어 상호참조해결을 위한 BERT 기반 end-to-end 신경망 모델을 제안하고, 한국어 데이터로 사전 학습된 KorBERT를 이용하고, 한국어의 구조적, 의미적 특징을 반영하기 위하여 의존구문분석 자질과 개체명 자질을 적용한다. 실험 결과, ETRI 질의응답 도메인 상호참조해결 데이터 셋에서 CoNLL F1 (DEV) 71.00%, (TEST) 69.01%의 성능을 보여 기존 연구들에 비하여 높은 성능을 보였다.

• Geomechanics and Engineering
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• v.23 no.6
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• pp.523-533
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• 2020

The current study focuses on the effect of the end shape of steel pipe piles on installation effort and bearing resistance using the pressing method of installation under dense ground conditions. The effect of pile rotation on the installation effort and bearing resistance is also investigated. The model steel piles with a flat end, cone end and cutting-edge end were used in this study. The test results indicated that cone end pile with the pressing method of installation required the least installation effort (load) and showed higher ultimate resistance than flat and cutting-edge end piles. However, pressing and rotation during cutting-edge end pile installation considerably reduces the installation effort (load and torque) if pile penetration in one rotation equal to the cutting-edge depth. Inclusion of rotation during pile installation reduces the ultimate bearing resistance. However, if penetration of the cutting-edge end pile equal to the cutting-edge depth in one rotation, the reduction in ultimate resistance can be minimized. In comparing the cone and cutting-edge end piles installed with pressing and rotation, the least installation effort is observed in the cutting-edge end pile installed with penetration rate equal to the cutting-edge depth per rotation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.11
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• pp.1486-1494
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• 2021

Character recognition is a technology required in various platforms, such as smart parking and text to speech, and many studies are being conducted to improve its performance through new attempts. However, with low-quality image used for character recognition, a difference in resolution of the training image and test image for character recognition occurs, resulting in poor accuracy. To solve this problem, this paper designed an end-to-end learning neural network that combines image super-resolution and character recognition so that the character recognition model performance is robust against various quality data, and implemented an alternative whole learning algorithm to learn the whole neural network. An alternative end-to-end learning and recognition performance test was conducted using the license plate image among various text images, and the effectiveness of the proposed algorithm was verified with the performance test.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.04a
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• pp.51-54
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• 2003

Three kinds of experiments were conducted to test existing methods and develop an effective methodology for the remediation of DNAPL trapped in vertical dead-end fractures. A water-flushing method failed to remove TCE from vertical dead-end fractures where no fluid flow occurs. A water-flushing experiment implies that existing remediation methods, utilizing water-based remedial fluid such as surfactant-enhanced method, have difficulty in removing DNAPL trapped from the vertical downward dead-end fractures, because of no water flow through dead-end fractures, capillary, and gravity forces. Fluid denser than TCE was injected into the fracture network, but did not displace TCE from the vertical dead-end fractures. Base(B on the analysis of the experiments, the increase in the density of the dense fluid and the addition of surfactant to the dense fluid were suggested, and this composite dense fluid with surfactant effectively removed TCE from the vertical dead-end fractures.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.1323-1326
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• 2004

A bogie frame of welded type have some problems. Some end beam has cracked. The cracks have profound influence on the safe freight service. The bogie consists of a frame, suspensions, brakes and wheel sets. Various analyses including a numerical simulation using a finite element method, a static load test, a fatigue test, and running test should be carried out to design the bogie. However cracks have been found at some end beams of the bogies mounted on the freight cars running with the high speed. The cracks of the end beam results in deterioration of the brake performance and the running safety. Numerical simulations and dynamic tests are carried out to figure out the causes of cracks in the existing bogie, and the vibrational characteristics of the improved bogie are compared with those of the conventional one. In this reports, the vibration characteristics were dealed with the most pressing matters for the solution of the end beam crack.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1993.04a
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• pp.329-338
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• 1993

The main objective of this paper is analyzing the effects of task uncertainty on EUC characteristics and end user satisfaction. Task uncertainty were identified as an important determinant of EUC characteristics. And the moderating effect of task uncertainty on the relationship between EUC characteristics and end user satisfaction was suggested. A field study was undertaken to test the hypothesized relationships among task uncertainty, EUC characteristics, and end user satisfaction Data were collected from 138 end-user of 19 Korean business organizations. The empirical results indicated that task uncertainty was significantly related to EUC characteristics and that task uncertainty had significant effect on the relationship between EUC characteristics and end user satisfaction. Implications and future research directions are drawn for the management of EUC and for further research on EUC.

• The Korean Journal of Emergency Medical Services
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• v.20 no.3
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• pp.107-120
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• 2016

Purpose: The purpose of this study was to investigate the factors influencing death anxiety, hospices knowledge, and attitude towards end-of-life care among paramedic students. Methods: A self-reported questionnaire was completed by 196 paramedic students in D university college in J city from November 2011 to November 2014. The study instruments included death anxiety, hospices knowledge, and attitude towards end-of-life care. Data were analyzed by t test, ANOVA, post hoc $Scheff{\acute{e}}$ test, Pearson's correlation test, and stepwise multiple regression analysis using SPSS v. 20.0. Results: According to a stepwise regression on the factors influencing attitudes towards end-of-life care, 80.4% of variance (F=161.360, p<.001) was explained by experience of death, hospices knowledge, disappearance of death anxiety, satisfaction with relationships (${\geq}2$) and student attitude toward end-of-life care. In addition, 44.1% of the variance (F=39.434, p<.001) was explained by experience of death, satisfaction with relationship(${\leq}4$), warning of others about death anxiety, and family attitude towards end-of-life care. Conclusion: The attitude towards end-of-life care was influenced by hospices knowledge and death anxiety in paramedic students. It is necessary to provide training in understanding attitudes towards death anxiety and end-of-life care. An effective educational program should be developed and implemented among paramedic students to improve their awareness of death and anxiety hospices knowledge.

• Proceedings of the Korean Geotechical Society Conference
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• 2002.03a
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• pp.589-596
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• 2002

In this study, static pile load tests with load transfer measurement were accomplished in the field. Yield pile capacity (or ultimate pile capacity) determined by load-settlement-time relationship was determined and axial load transfer behavior was analyzed. In the test for the four test piles were behaved as end bearing pile but ratios of skin friction to total pile capacity were 27%∼33%.

• Journal of Hospice and Palliative Care
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• v.21 no.4
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• pp.124-136
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• 2018

Purpose: This descriptive study is aimed at identifying how nursing hospital workers' performance of end-of-life care is influenced by their knowledge and awareness of hospice palliative care, attitude towards end-of-life care, performance, importance, awareness of death and the factors. Methods: A self-reported questionnaire was used to collect data from 113 workers at an accredited nursing hospital in K province. Variables were their knowledge and awareness of hospice palliative care, attitude towards end-of-life care, end-of-life care performance and importance and awareness of death. An analysis was performed with the frequency, percentage, mean, standard deviation, t-test, ANOVA, Scheffe's test, Pearson's correlation coefficient and multiple regression using IBM SPSS 21.0. Results: The factors affecting the nursing hospital workers' end-of-life care performance were the importance of end-of-life care and their marital status, which showed an explanatory power of 38.2%. Conclusion: In order to improve the nursing hospital workers' end-of-life care performance, a training on the importance of end-of-life care should be provided. Therefore, we would like to propose establishing administrative measures such as 1) efficient staffing to help the caregivers better perform what they think is important, 2) development of a training program that can improve their performance of end-of-life nursing care and 3) a study to verify the effectiveness of the program.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.10 no.4
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• pp.121-126
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• 2011

An accumulator placed on the refrigerant cycle pipe lines is a part to relax fluctuations of pressure within the pipe lines and stabilize refrigerants flowed into pipe. The accumulator has been mainly manufactured by the process of tube spinning using CNC(Computer Numerical Control) lathe. However, this process has the defects which are low productivity per hour and high cost. For that reason, tube end-forming using roll die is actively being developed, recently. The purpose of this study is to develope the tube end-forming process using roll die in order to manufacture the accumulator for the refrigeration pipe lines. First, the process design of tube end-forming was performed based on specification of product, and then was verified with FE analysis. Also, the effects of friction coefficient and revolution speed of roll die on forming load were investigated. The analytical results were applied in the final process design of tube end-forming. Finally, tube end-forming test was carried out to verify the validity of the FE analysis and the process design.