• 전자통신동향분석
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• 제34권1호
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• pp.98-110
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• 2019

Machine learning has been applied to medical imaging and has shown an excellent recognition rate. Recently, there has been much interest in preventive medicine. If data are accessible, machine learning packages can be used easily in digital healthcare fields. However, it is necessary to prepare the data in advance, and model evaluation and tuning are required to construct a reliable model. On average, these processes take more than 80% of the total effort required. In this study, we describe the basic concepts of machine learning, pre-processing and visualization of datasets, feature engineering for reliable models, model evaluation and tuning, and the latest trends in popular machine learning frameworks. Finally, we survey a explainable machine learning analysis tool and will discuss the future direction of machine learning.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.23-30
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• 2021

The purpose of this study is to compare the level of risk and return of Islamic stocks in the Jakarta Islamic Index (JII) with conventional stocks on the IDX30 in the period from January 2017 to July 2019. The Sharpe ratio method is used to calculate risk and stock returns. The performance of the stock portfolio is measured by comparing the risk premium portfolio with the portfolio risk that is expressed as a standard deviation of the total risk. This study uses secondary data collected by the Indonesia Stock Exchange (IDX), which provides the names of stock issuers included in the JII and IDX30 indices along with their montly closing price. The results of the descriptive analysis show that the JII Sharpe ratio index from January 2017 to July 2019 is from the minimum range of -0.28820 to a maximum range of 0.05622, while the IDX30 Sharpe ratio index from January 2017 to July 2019 is from the minimum range of -0.09290 to the maximum range of 0.17436. The results of inferential analysis using a different test show that there is a significant difference between the Sharpe ratio JII and IDX30 in measuring the performance of the stock portfolio.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2017년도 추계학술대회 논문집
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• pp.893-912
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• 2017

제4차 산업혁명이 무엇인지 살펴보고, 그것과 관련된 ICT 기술에 대해 설명한다. ICT의 그동안의 변화에 대해 단계적으로 관련된 기술을 살펴보고, 향후 4차 산업혁명을 대비하기 위해 ICT 입장에서 대응해야할 전략으로 IDX(Intelligent Digital Transformation: 지능적 디지털 혁신)을 제안한다.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.109-115
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• 2021

This study aims to examine the effect of Operating Costs and Income, Loan to Deposit Ratio on the Return on Asset (ROA) of Public-Private Foreign Exchange Banks listed on the Indonesia Stock Exchange (IDX) during the 2015-2018 period. This study is a quantitative study using financial reports of Public-Private Foreign Exchange Banks listed on the IDX as a data source. This study's population is 25 Public-Private Foreign Exchange Banks listed on the IDX. This study uses purposive sampling to determine the sample to produce 21 banking companies. Data was analyzed using multiple linear regression methods and descriptive statistics. The F Test calculation results state that all the variables of free operating expenses, operating income, and the loan to deposit ratio simultaneously and significantly affect the return on assets (ROA) variable in Public-Private Foreign Exchange Banks listed on the IDX. This study's results indicate that simultaneously Operational Costs, Operational Income, and Loan to Deposit Ratio have a significant effect on ROA. Operational Costs and Operational Income have a significant negative impact on Return on Assets. The third hypothesis shows that the Loan to Deposit Ratio has a positive and insignificant effect on Return on Assets.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.15-22
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• 2021

This study aims to obtain a stock investment strategy model based on the industrial sector in Indonesia Stock Exchange (IDX). This study uses IDX data for the period of January 1996 to December 2016. This study uses the Markov Regime Switching Model to identify trends in market conditions that occur in industrial sectors on IDX. Furthermore, by using the Logit Regression Model, we can see the influence of economic factors in determining trends in market conditions sectorally and the probability of trends in market conditions. This probability can be the basis for determining stock investment decisions in certain sectors. The results showed descriptively that the stocks of the consumer goods industry sector had the highest average return and the lowest standard deviation. The trend in sectoral stock market conditions that occur in IDX can be divided into two conditions, namely bullish condition (high returns and low volatility) and bearish condition (low returns and high volatility). Differences in the conditions are mainly due to differences in volatility. The use of a Logit Regression Model to produce probability of market conditions and to estimate the influence of economic factors in determining stock market conditions produces models that have varying predictive abilities.

• 정보와 통신
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• 제34권5호
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• pp.53-60
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• 2017

본고에서는 4차 산업혁명 도래에 따른 에너지 산업분야에서의 미래 트렌드 대응형 에너지 IDX 기술 개발 현황과 추후 방향성에 대해 기술하고자 한다. 이를 통해 에너지 신산업 창출에 있어서 ICBMS (IoT/Cloud/Big Data/Mobile/Security)와 인공지능, 그리고 블록체인 등의 기술의 내재화를 통한 새로운 에너지 기술의 방향에 대해 가늠해 보고자 한다.

• 대한전자공학회논문지SD
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• 제46권12호
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• pp.66-72
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• 2009

본 논문에서는 H.264/AVC에서 사용되는 엔트로피 부호화 방법 중 하나인 CABAC를 위한 효율적인 이진 산술 부호화기를 제안한다. 기존의 이진 산술 부호화 알고리즘은 연산의 복잡도와 각 단계간의 데이터 의존도가 매우 높기 때문에 빠른 연산이 어렵다. 따라서 연산 과정의 복잡도와 데이터 의존도를 줄이기 위하여 재정규화 과정을 효율적으로 처리할 수 있는 2단 파이프라인 구조를 사용한다. 하드웨어 면적을 줄이기 위해서 문맥 모델 갱신기는 transIdxMPS 표를 간단한 식으로 표현하고, transIdxLPS 표와 rangeTabLPS 표를 함께 구현한다. 산술 연산기는 입력 값의 발생 확률에 따라 일반 모드, 우회 모드, 종결 모드로 나누어 설계하여 각 모드마다 최대 속도로 동작할 수 있게 한다. 제안하는 이진 산술 부호화기는 0.18um 표준 셀 라이브러리에서 7282 게이트의 면적을 사용하며 입력 심벌 당 소요되는 사이클 수는 약 1을 갖는다.

• Biomolecules & Therapeutics
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• 제18권1호
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• pp.16-23
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• 2010

Adipocyte differentiation in human bone marrow mesenchymal stem cells (hBM-MSCs) is not as efficient as that in murine pre-adipocytes when induced by adipogenic agents including insulin, dexamethasone, and 3-isobutyl-1-methylxanthine (IDX condition). Therefore, the promotion of adipocyte differentiation in hBM-MSCs has been used as a cell culture model to evaluate insulin sensitivity for anti-diabetic drugs. In hBM-MSCs, $PPAR{\gamma}$ agonists or sulfonylurea anti-diabetic drugs have been added to IDX conditions to promote adipocyte differentiation. Here we show that troglitazone, a peroxisome proliferator-activated receptor-gamma ($PPAR{\gamma}$) agonist, significantly reduced the levels of anti-adipogenic $PGE_2$ in IDX-conditioned hBM-MSC culture supernatants when compared to $PGE_2$ levels in the absence of $PPAR{\gamma}$ agonist. However, there was no difference in the mRNA levels of cyclooxygenases (COXs) and the activities of COXs and prostaglandin synthases during adipocyte differentiation in hBM-MSCs with or without troglitazone. In hBM-MSCs, troglitazone significantly increased the mRNA level of 15-hydroxyprostaglandin dehydrogenase (HPGD) which can act to decrease $PGE_2$ levels in culture. These results suggest that the role of $PPAR{\gamma}$ activation in promoting adipocyte differentiation in hBM-MSCs is to reduce anti-adipogenic $PGE_2$ levels through the up-regulation of HPGD expression.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.675-685
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• 2021

The purpose of this study is to examine the reaction of stock prices on the implementation of Extensible Business Reporting Language (XBRL) in companies listed on the Indonesia Stock Exchange (IDX). Using the event study method and calculating abnormal returns of the 2015 financial statements of 462 companies listed on the IDX, findings showed that 49 companies have not applied the XBRL format in their financial statements. Based on the results of the Average Abnormal Return (AAR) and Cumulative Average Abnormal Return (CAAR) values, using the one-sample test, investors react to shares in companies that have not implemented XBRL and who have implemented XBRL; however, based on the independent t-test based on average values there are differences between companies that have not applied XBRL and those who have implemented XBRL. This research only looks at the one-year implementation of XBRL in financial reporting (2015), then the research does not separate which companies are on time in the delivery of financial statements to the public through the IDX website. Our research contributes to the understanding of the use of XBRL in corporate financial reporting because before the XBRL financial reporting format was published, the company had published a financial statement format based on the legal provisions of financial statements in Indonesia.

• 한국멀티미디어학회지
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• 제21권3호
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• pp.16-23
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• 2017