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Comparative Analysis of PM10 Prediction Performance between Neural Network Models
정용진,오창헌 한국정보통신학회 2021 Journal of information and communication convergen Vol.19 No.4
Particulate matter has emerged as a serious global problem, necessitating highly reliable information on the matter. Therefore,various algorithms have been used in studies to predict particulate matter. In this study, we compared the prediction performanceof neural network models that have been actively studied for particulate matter prediction. Among the neural networkalgorithms, a deep neural network (DNN), a recurrent neural network, and long short-term memory were used to design theoptimal prediction model using a hyper-parameter search. In the comparative analysis of the prediction performance of eachmodel, the DNN model showed a lower root mean square error (RMSE) than the other algorithms in the performance comparisonusing the RMSE and the level of accuracy as metrics for evaluation. The stability of the recurrent neural network was slightlylower than that of the other algorithms, although the accuracy was higher.
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크라운에테르 카르복시산과 크라운에테르 포스포닉산을 포함한 알칼리 금속과 알칼리 토금속 양이온 혼합물의 경쟁적 용매추출
정용진 한국유화학회 2005 한국응용과학기술학회지 Vol.22 No.3
Competitive solvent extraction of the mixure of alkali metal and alkaline earth cation from water into organic solvent containing the crown ether carboxylic acid and anlogous crown ether phosphonic acid was investigated as follows. The lipophilic group is found to strongly influence to the selective extraction in the mixed systems from only alkali metal cation for sym-(n-decyldibenzo)-16-crown-5-oxyacetic acid _1 to mostly alkaline earth metal cation for sym-bis[4(5)-tert-butylbenzo]-16-crown-5-oxyacetic acid _3. Monoethyl sym-(n-decyldibenzo)-16-crown-5-oxymethylphosphonic acid _2. and monoethyl-sym- bis]4(5)-tert-butylbenzo]-16-crown-5-oxymethylphosphonic acid _4 showed good selectivity for Na+ over Mg2+, the second extracted ion. Structural variation in the crown ether phosphonic acid somewhat was influenced to the extraction selectivity in the mixed systems. when variation of the ionized group is influenced in the mixed systems, the selectivity of Na+ as the second extracted ion was much better crown ether carboxylic acid _1 than crown ether phosphonic acid _2, while the efficiency of Na+ extraction was better _2 (83% total loading) than _1 (32%).
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정용진 국민대학교 2003 造形論叢 Vol.22 No.-
상업주얼리 제작공정을 알아보기 위해 기본적으로 수행되어야 하는 것이 생산체계를 분석하고 적절한 제작조건이 성립되는지 판단하여야 한다. 이 논문을 통해 주얼리업체에 대한 전반적인 조직의 구성과 운영체계 및 생산체계에 걸쳐 연구하였다. 회사의 경영전략과 마케팅 방향에 따라 혹은 소비자 욕구에 따라 생산단계의 적응력과 응용력을 볼 수 있었다. 즉, 외적인 요소와 회사 내부의 투자와 여건에 따라 제작공정에 투입되는 인원 및 공정의 질적, 양적인 부분이 다르게 적용됨을 확인하였다. 이 연구과제에서 제시하는 것은 일반적인 상업주얼리의 체계와 공정을 보여주며 이를 업체의 경영마인드와 주요대상이 되는 시장에 맞추어 적합한 체계를 수립 할 필요가 있다. 실제 생산에서는 다양한 변수가 작용함으로 이에 따른 공정설계, 단기 또는 장기적인 플로어 플랜, 자원의 효율적 투자 그리고 자금의 확보에 맞게 개선해야 한다. 이 논문을 통해 현재 상업주얼리 업체의 현황과 그 실태를 살펴볼 수 있을 것이다
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정용진,김태형 충북대학교 법학연구소 2019 法學硏究 Vol.30 No.1
In the case of Korea, due to the onset of the economic recession since IMF in 1997, there have been attempts to shift away from a traditional working system in which workers work at fixed working hours and get paid, and atypical labor relationships such as short-time workers, temporary workers, and temporary agency workers to be discussed in this study, have been introduced and increased exponentially. Especially, in the case of temporary agency workers, since the scope of job duties available for these workers has been clearly specified in the corresponding act, there has been an attempt to transform the system of temporary agency workers to be illegal and consequently, there has been a growing number of temporary agency workers who cannot be protected under the act. In addition, since the act clearly stipulates the cause and period for the extension of a work service provided by temporary agency workers, it rather makes the status of temporary agency workers worse. Moreover, due to the introduction of a concept similar to temporary agency workers and conflict with other concepts, such as mediation, its boundary has become obscured. In the case of China, ever since China’s reform and opening up in 1987, the government has promoted the system of temporary agency workers to attract foreign investment, to promote re-employment of workers * Ph.D, Action Officer of Chungcheonbuk-Do Officer of Education ** Ph.D. Candidate, Law School, Chungbuk National University. 한 ․중 근로자파견제도에 관한 소고 149 dismissed from state-owned companies, and relocation of rural manpower to cities, and to resolve the employment of college graduates. Still, even though the government has promoted this system, the concepts of temporary agency workers and other labor-related terms have not been clearly defined, and these temporary worker agencies are often assigned with various duties and sometimes the government acts as a temporary worker agency. Due to these various issues, it is not possible to have the corresponding act in effect. Also, even though three basic labor rights are stipulated in the Constitution, they are generally neglected in the field. In addition, there is no government agency to relieve the violation of rights and interests of temporary agency workers. In order to protect temporary agency workers, the expansion of the scope of assigned duties for temporary agency workers, legislation of common used temporary agency workers, and flexibilization of employment period of temporary agency workers would be necessary measures to be taken in Korea. In the case of China, it would be necessary to define ambiguous legal terms, assure three labor rights and interests, and legislate common used temporary agency workers, and establish government agencies for temporary agency workers.
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