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합성곱 신경망 기반 환경잡음에 강인한 교통 소음 분류 모델
이재준,김완수,이교구,Lee, Jaejun,Kim, Wansoo,Lee, Kyogu 한국음향학회 2018 한국음향학회지 Vol.37 No.6
As urban population increases, research on urban environmental noise is getting more attention. In this study, we classify the abnormal noise occurring in traffic situation by using a deep learning algorithm which shows high performance in recent environmental noise classification studies. Specifically, we classify the four classes of tire skidding sounds, car crash sounds, car horn sounds, and normal sounds using convolutional neural networks. In addition, we add three environmental noises, including rain, wind and crowd noises, to our training data so that the classification model is more robust in real traffic situation with environmental noises. Experimental results show that the proposed traffic sound classification model achieves better performance than the existing algorithms, particularly under harsh conditions with environmental noises.
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이재준,이우주,김정환,Lee, JaeJune,Lee, Woojoo,Kim, Junghwan 한국통계학회 2015 응용통계연구 Vol.28 No.3
Accurate demand forecasting is a crucial component in revenue management(RM). The booking data of departed flights is used to forecast the demand for future departing flights; however, some booking requests that were denied were omitted in the departed flights data. Denied booking requests can be interpreted as censored in statistics. Thus, unconstraining demand is an important issue to forecast the true demands of future flights. Several unconstraining methods have been introduced and a method based on expectation maximization is considered superior. In this study, we propose a new unconstraining method based on a regression model that can entertain such censored data. Through a simulation study, the performance of the proposed method was evaluated with two representative unconstraining methods widely used in RM.
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평생교육 참여는 학력과 소득의 관계를 조절하는가? : 연령대 및 세대별 차이를 중심으로
이재준 ( Lee Jaejun ),함은혜 ( Ham Eun Hye ) 인하대학교 교육연구소 2021 교육문화연구 Vol.27 No.1
This study aims to investigate whether adult learners’ lifelong learning could affect the relationship between education and income, which is one of the indicators of social outcomes of lifelong education. Using the Korean sample consisting of the data from the Programme for the International Assessment of Adult Competencies (PIAAC), we conducted a series of multiple regression to predict individuals’ income including the interaction term of education levels(schooling) and job-related lifelong learning participation, seperately by age group and by generation according to the developmental stages of higher education. Main findings are as follow: First, education levels has a significant effect on earnings, except for those over 55 years of age. Participation in job-related lifelong education has a significant positive effect on earnings in all age groups and generations. Second, we found that participation in job-related lifelong education positively moderated the effect of education levels on income only among people who are ‘55 years of age or older’ and those who lived the ‘elite stages’ of higher education development. Implications and further directions were discussed.
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이재준 ( Jaejun Lee ) 온지학회 2015 溫知論叢 Vol.0 No.44
본고는 전란가사에 나타난 세계인식의 경향을 살펴보려고 했다. 이를 위해 왜란을 다룬 가사와 호란을 다룬 가사라는 두 가지 범주를 설정해양측의 문제의식과 대응방식을 비교·대조해 보았다. 왜란가사는 상대를 절대부정의 배타적 집단으로 관념화하고, 구성원 각자의 도덕적 각성을 통해 문제를 해결하려 했다. 반면 호란가사 「병자난리가」는 상대의 실제적인 힘을 용인하고, 그에 대한 구성원들의 올바른 선택과 판단을 요청했다. 결국 왜란가사와 비교했을 때, 호란가사 「병자난리가」는 관념적 세계해석의 탈각, 수기와 치인·인성과 천명의 분리, 왕의 능동적 정치행위 자각과 같은 사고체계의 전환을 확인할 수가 있었다. 이러한 전환의 배경에는 기존의 제국질서 및 사회운영원리의 균열이라는 대내외적 이상 징후가 자리하고 있었다. 그리고 그렇게 달라진 세계인식은 사회문화적 차원에서 우리에게 두 가지 생각할 지점들을 제공해준다. 첫째, 조선사의 기술에서 임진왜란과 병자호란은 ‘임·병 양란’으로 통칭되는 것에서 보듯 단일한 구조와 성격의 사건으로 해석되는 경향이 있었다. 그런데 앞서 확인한 변화상들이 종래 정치·역사적 차원에서 조선후기를 설명하는 증표들로 논의되어왔던 것이 사실이고 보면, 해당 분석결과는 적어도 인식의 측면에서는 양란을 분리해서 바라볼 필요성을 제기하고 있다고 생각한다. 임란 후 어느 시점까지는 여전히 균열보다는 통합과 안정에 대한 믿음이 우세했음을 유념할 필요가 있다는 것이다. 둘째, 시가 연구와 관련해서는 17세기 가사의 존재 문제를 다시금 환기하고 있어 또한 중요한 의미가 있다고 본다. 「병자난리가」의 경우, 17세기 가사가전대 가사와 구분되는 변화와 갱신의 지점을 함의하고 있다는 주장들에 힘을 실어줄 수 있는 또 하나의 근거가 될 수 있을 것으로 보인다. This paper tried to identify world perception trend which appeared in Jeolan kasa (Korean war verses). For this, two categories of verses treating Waeran(倭亂) and Horan(胡亂) were established and critical mind and responding method in both verses were compared and contrasted. Waeran Kasa(倭亂歌辭) conceptu alized the enemy as an exclusive group we should negate absolutely, and tried to solve the problem by moral awakening. On the other hand, Horan Kasa(胡亂歌辭: 「Byeongjanaliga」丙子亂離歌) acknowledged real power of the enemy, and demanded the Korean people to have proper choice and judgement. Compared with the case of Waeran Kasa, we can identify the conversion of thinking syste m such as escape from conceptual understanding of the world, division of self-cu ltivation(修己) and governing People(治人), and of human nature(人性) and hea venly mandate(天命), and demand of active behavior of the king, in 「Byeongjan aliga」. At this changing background, internal and external unusual symptoms were lo cated which was existing imperial order and society operation principle. And, tha t changed world perception gives us the two points to think socio-cultural level. First, Imjin War(壬辰倭亂) and Manchu War(丙子胡亂) in Joseon history(朝鮮史) description have the tendency to be interpreted as the accidents with single structure and character as it is commonly called as ‘Im and Byung, both wars (壬丙兩亂)’. Considering the truth that precious changes which were identified e arlier have been discussed as the proofs to explain late Joseon at the levels of pr evious political and historical level, it is considered that relevant analysis results are raised the necessity at least to look at both wars separately from the percepti on viewpoints. It means it would be necessary to note that the belief about inte gration and stability has been still dominating until the certain point of time aft er Imjin War. Second, verse research arouses the existence of 17th century again and it also shows important meaning. The case of 「Byeongjanaliga」 could be co nsidered as another background to empower the assertion that 17th century vers es imply the points of changes and renewal which are separated from previous generation verses.
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고등교육 영역에서의 직업교육과 교양교육의 통합적 접근 가능성 탐색
이재준 ( Lee Jaejun ) 인하대학교 교육연구소 2018 교육문화연구 Vol.24 No.5
The purpose of this study is to explore the possibility of integrated approach of vocational education and liberal education in the situation where higher education is universalized and vocational education institution is strongly demanded the role of university. To this end, the meaning of vocation and vocational education was reviewed extensively, and at the same time, the meaning of liberal education for human life was searched. When a vocation is understood as a productive work with economic value, social value, internal value of self-realization in social relations and the concept of work, vocational education is for not a job-oriented functional specialty but a capacity for occupational activity and the meaning of life. And vocational education can be conceptualized as a whole restructuring process of life. Although liberal education has changed its meaning historically, it has a current meaning as a learning opportunity to set the direction of life in the continuous reconstruction process through the criticism and reflection on the real world of life. It is important to recognize the value of vocation as an aspect of life beyond practical value because vocation is an activity that encounters the self and the world. The role of liberal arts education is not only the acquisition of higher level expertise but also the cutivation of the ability to reflect on the meaning of the job in life and the ability to reconstruct the life. The discourse of competency that emerged with the possibility of practicing in recent years also has the character of liberal education in terms of emphasizing general ability for social life and emphasizes the importance of practical value in liberal education. In conclusion, the two discourses of vocational education and liberal education can only be integrated when understanding the vocation from the view of whole life, and from the integrated view of learning.
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