• 감성과학
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• 제23권2호
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• pp.61-74
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• 2020

Voice user interface has become a commercially viable and extensive interaction mechanism with the development of voice assistants. Despite the popularity of voice assistants, the academic community does not utterly understand about what, when, and how users chat with them. Chatting with a voice assistant is crucial as it defines how a user will seek the help of the assistant in the future. This study aims to cover the essence and construct of conversational AI, to develop a classification method to deal with user utterances, and, most importantly, to understand about what, when, and how Chinese users chat with voice assistants. We collected user utterances from the real conventional database of a commercial voice assistant, NetEase Sing in China. We also identified different utterance categories on the basis of previous studies and real usage conditions and annotated the utterances with 17 labels. Furthermore, we found that the three top reasons for the usage of voice assistants in China are the following: (1) greeting, (2) function, and (3) music. Chinese users like to interact with voice assistants at night from 7 PM to 10 PM, and they are polite toward the assistants. The whole percentage of negative feedback utterances is less than 6%, which is considerably low. These findings appear to be useful in voice interaction designs for intelligent hardware.

• 한국의류산업학회지
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• 제16권4호
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• pp.625-634
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• 2014

This study develops a sizing system of mass-customized male suits for wheelchair users. One hundred and three male wheelchair users' 21 anthropometric dimensions were measured to identify body shapes and develop a sizing system. The measured wheelchair users' body sizes were compared with the average body sizes of Korean males from the $6^{th}$ Korean Body Size Survey to understand the body size differences between two groups. As a result of body shape classification using the KS's Drop method, wheelchair user body shapes were classified into four shapes for upper-body (A: 32%, B: 26%, BB: 24%, and Y: 18%), and two shapes for lower-body (B: 70% and A: 30%). The upper-body of wheelchair users was relatively developed than Korean males; however, the lower-body was relatively stunted. The key dimensions of a sizing system were selected as chest circumference, waist circumference, and trunk length, outside leg length based on the correlation analysis between anthropometric measures. The top sizes were determined considering chest and waist circumferences for horizontal sizes, and additionally the trunk length was divided into short, medium, and long groups for vertical sizes. The bottom sizes were selected considering the waist and hip circumferences for horizontal sizes, and additionally their outside leg length was divided into short, medium, and long groups for vertical sizes.

• 한국안전학회지
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• 제33권4호
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• pp.1-7
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• 2018

This paper is analyzed for the thermal characteristics(1 year) of the 6 components(DC breaker, DC filter(including capacitor and discharge resistance), IGBT(Insulated gate bipolar mode transistor), AC filter, AC breaker, etc.) of a photovoltaic power generation-based PCS(Power conditioning system) below 20 kW. Among the modules, the discharge resistance included in the DC filter indicated the highest heat at $125^{\circ}C$, and such heat resulting from the discharge resistance had an influence on the IGBT installed on the rear side the board. Therefore, risk priority through risk priority number(RPN) of FMEA(Failure modes and effects analysis) sheet is conducted for classification into top 10 %. According to thermal characteristics and FMEA, it is necessary to pay attention to not only the in-house defects found in the IGBT, but also the conductive heat caused by the discharge resistance. Since it is possible that animal, dust and others can be accumulated within the PCS, it is possible that the heat resulting from the discharge resistance may cause fire. Accordingly, there are two options that can be used: installing a heat sink while designing the discharge resistance, and designing the discharge resistance in a structure capable of avoiding heat conduction through setting a separation distance between discharge resistance and IGBT. This data can be used as the data for conducting a comparative analysis of abnormal signals in the process of developing a safety device for solar electricity-based photovoltaic power generation systems, as the data for examining the fire accidents caused by each module, and as the field data for setting component management priorities.

• 한국지리정보학회지
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• 제10권4호
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• pp.87-96
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• 2007

본 연구는 산지관리법의 산지전용허가기준 중 산지표고기준을 개선하기 위해 GIS를 이용하여 능선구분 프로그램을 개발하였다. 본 연구에서 개발된 능선구분 프로그램은 산지를 구분하기 위해서 집수면적이 30ha 되는 지점의 유출구를 산자락 하단부로 가정하였고, 산정부를 구분하기 위해서 5부 능선을 적용하였다. 능선구분에서의 오류를 제거하기 위해 임상도를 이용하여 산지가 아닌 지역을 제거하였다. 본 연구를 통해 개발된 프로그램의 적용성을 검토한 결과, 현행 산지관리법을 적용했을 경우 약 3%($30,956m^2$)가 5부 능선이상 지역으로 분석된 반면에 프로그램을 적용했을 경우에는 약 58%($696,300m^2$)가 5부 능선이상 지역으로 분석되었다. 이러한 결과는 산정부 및 산자락 하단부 기준의 적용방법이 다르기 때문에 나타났다. 본 연구를 통해 개발된 능선구분 프로그램을 시 군에 보급하기 위해서는 산정부 및 산자락 하단부 기준의 객관성을 입증해야 하며, 제도적으로 능선구분개념을 수정해야만 할 것이다.

• 벤처창업연구
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• 제17권1호
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• pp.229-249
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• 2022

본 연구는 다양한 머신러닝 기법을 통해 코스닥(KOSDAQ) 시장 내 관리종목 지정을 예측할 수 있는 모델에 대해 연구하였다. 증권시장 내 기업이 관리종목으로 지정이 되면 시장에서는 이를 부정적인 정보로 인식하여 해당 기업과 투자자에게 손실을 가져오게 된다. 본 연구를 통해 기업의 재무적 데이터를 바탕으로 조기에 관리종목 지정을 예측하고, 투자자들의 포트폴리오 리스크 관리에 도움을 주기 위한 머신러닝 접근이 타당한지 살펴본다. 본 연구를 위해 활용한 독립변수는 수익성, 안정성, 활동성, 성장성을 나타내는 21개의 재무비율을 활용하였으며, K-IFRS가 적용된 2011년부터 2020년까지 관리종목과 비관리종목의 기업의 재무 데이터를 표본으로 추출하였다. 로지스틱 회귀분석, 의사결정나무, 서포트 벡터 머신, 랜덤 포레스트, LightGBM을 활용하여 관리종목 지정 예측 연구를 수행하였다. 연구결과는 분류 정확도가 82.73%인 LightGBM이 가장 우수한 예측 모형이었으며 분류 정확도가 가장 낮은 예측 모형은 정확도가 71.94%인 의사결정나무였다. 의사결정나무 기반 학습 모형의 변수 중요도의 상위 3개 변수를 확인한 결과 각 모형에서 공통적으로 나온 재무변수는 ROE(당기순이익), 자본금회전율(Capital stock turnover ratio)로 해당 재무변수가 관리종목 지정에 있어 상대적으로 중요한 변수임을 확인하였다. 대체적으로 앙상블을 이용한 학습 모형이 단일 학습 모형보다 예측 성능이 높은 것을 확인하였다. 기존 선행연구가 K-IFRS에 대한 고려를 하지 않았고, 다소 제한된 머신러닝에 의존하였다. 따라서 본 연구의 필요성과 함께 현실적 요구를 충족시키는 결과를 제시하였음을 알 수 있으며, 시장참여자들에게 있어 관리종목 지정에 대한 사전 예측을 확인할 수 있도록 기여했다고 볼 수 있다.

• 대한소아치과학회지
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• 제41권2호
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• pp.174-179
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• 2014

치내치란 치아 조직의 석회화가 일어나기 이전에 법랑기가 치유두 내로 함입되어 나타나는 발육성 이상을 말한다. 치내치는 임상적, 방사선학적으로 다양한 변이를 나타내며, 치내치의 여러 분류법 중 Oehlers(1957)가 제안한 분류법이 가장 널리 이용되고 있다. 치수는 건강한 채로 남아 있으나 함입부가 치주염과 연관된 Type III 병소를 치료하는데 다양한 술식들이 설명되어져왔다. 가장 우선시 되어야 하는 목표는 가능하다면 치수를 건전하게 보존하는 것이며, 치수질환의 명백한 증거가 없다면, 함입부를 치근과 별개로 치료하는 보존적인 접근법이 필요하다. 그러나, Type III 치내치의 근관치료는 근관과 함입의 충분한 잔사제거, 재현가능한 근관장의 조절, 일관된 충전등을 충분히 달성하기 어렵다는 문제점이 있다. 본 증례는 치근단 병소를 보이는 Type III 치내치의 치료에 함입부에만 제한된 보존적 근관치료 및 Mineral Trioxide Aggregate(MTA)를 이용한 폐쇄를 통해 양호한 결과를 얻었기에 보고하는 바이다.

• 대한한방내과학회지
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• 제41권4호
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• pp.658-667
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• 2020

Objectives: The purpose of this study was to analyze trends in Korean-Western Collaborative Medicine studies by disease group. Methods: Articles published until May 2020 were searched in domestic databases (NDSL, RISS, KISS, DBPIA, and KoreanTK) using the keywords '한양방', '양한방', '협진', '협의진료', '의한의', '의·한의', and '통합의학'. The articles were analyzed according to the publication year, journal type, research methodology, and disease group using the major and intermediate classifications of the Korean Standard Classification of Diseases (KCD-7). Results: In total, 112 articles were selected. The most frequent major disease groups were disease codes G, C (D), I, and M, in that order. The medium disease groups numbered 41 and most commonly involved collaborative studies on cerebrovascular diseases. Among the three top KCD-7 major group diseases, publications on Group C (D) were increasing significantly, publications on Group G were slightly increasing, but, publications on Group I decreased in the 2010s compared to the 2000s. Conclusions: In this study, we analyzed the frequent disease groups treated with domestic Korean-Western medicine in collaborative studies using the major and medium classifications of KCD-7. Well-designed clinical trials and economic evaluation research are needed, and this study can provide directions for future collaborative studies using Korean-Western medicine.

• 한국멀티미디어학회논문지
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• 제18권11호
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• pp.1419-1426
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• 2015

Distinguishing border between news and advertising is disappearing. Traditional journalism considered editorial part deals news and ad part handle commercial messages. But now this classification is meaningless. Current news consumers do not separate advertising content and non-advertising content. In Korea, making fake news or paid news pages is becoming social problem. Fake news uses various camouflages to pretend to be real news. This paper descriptively analyzed Korean fake news cases and suggested some guidelines for publishing news. We analyzed 3 major newspaper web sites from July to September, 2014. These three newspapers publish section pages everyday containing fake news or sponsored news. Totally more than one thousand articles were selected for content analysis. We coded the numbers of fake news, day of the week, the rate of sponsored news, average fake news publication number per pages, the conformity between news and advertising, and the type of fake news. We also coded the number of sponsored news article in day sections. We used method of comparing the advertising contents and news articles. As a result, 24.8% of news article were published for the advertising sponsors. Advertorial or fake news were sometimes arranged same pages the same day. We coded the conformity between same advertising and news content. More than 60 percent (60.9%) of fake news match with their sponsors. PR style of fake news is top and advertising type of fake news is the lowest.

• 환경영향평가
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• 제15권6호
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• pp.407-415
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• 2006

This study carried out submerged area due to Dam construction in the near future. It includes species classification of plant, survey of community structure, examination of pollutant load and assessment of water quality impact. The vascular plants of this area are listed 224 taxa; 64 families, 168 genera, 193 species, 30 varieties and 1 form. This study area is classified into total 21 communities, most community was consist of grass vegetation. Among the communities, Erigeron annuus ($869,286m^2$, 22%) community was dominant and Erigeron annuus-Avena fatua comminity (16%) was subdominant until May, and then Erigeron canadensis community occupied most area to $1,774,985m^2$ (32%) from May to July. For the evaluation of water quality impact due to submerged macrophyte, nutrient release test was conducted both dead body macrophyte and living body macrophyte. The results of release test show that T-N is not released at dead body macrophyte, but it is released at living body macrophyte, especially living body Artemisia priceps var. orientalis shows 1.436mgN/g. At release test of dead body macrophyte, T-P release rate of Erigeron annuus shows 0.500mgP/g at the top of them and it also shows 0.436mgP/g at Erigeron annuus of living body macrophyte. T-N load of submerged macrophyte shows 0.76% by comparison of total load on watershed and T-P load of that shows 3.61%. In case of removal macrophyte for reduction of pollutant load in submerged area, T-N load of submerged macrophyte changes from 0.76% to 0.15% by comparison of total load on watershed and T-P load of that changes from 3.61% to 0.72%.

• 경영과학
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• 제33권3호
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• pp.53-64
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• 2016

The government is mapping out R&D innovation measures aimed at improving the qualitative level of the performance of national R&D projects that are supported by grants or public funds. This paper proposes ways of making improvements in technology planning, project assessment, performance management, and results evaluation in order to boost the efficiency of the country's promotion of ICT R&D projects, as well as to upgrade the processes involved with its technological innovation system at each of the commercialization stages of its R&D projects. According to our experts' in-depth survey and interview, it has been found that technology planning is the most important phase in the full cycle-based technological innovation system and that the promotion of a combination of top-down and bottom-up approaches is the most reasonable. This paper also suggests it is necessary to secure a process for exploring technological opportunities as the preparatory phase for technology planning, and that it is desirable to reflect the technology demand map associated with the technology road map. Currently, R&D projects are divided into policy designation, designation contest, and free contest. To minimize the inefficiency associated with indiscriminate competition, this paper proposes the introduction of a general contest system in order to change the project assessment system into one based on the results of the competition in each category(e.g. firms, universities, research institutions, etc.).