• Journal of Multimedia Information System
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• 제8권4호
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• pp.295-300
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• 2021

Recent advances in Internet-of-Things and wearable computing have established computationally sufficient infrastructure to remove the barriers of physical locations. The recent COVID-19 pandemic has accelerated the use of remote collaboration, work-from-home, teleconferencing, online education, digital twin, and metaverse enriched with various configurations of augmented reality, virtual reality, mixed reality, and extended reality. Beyond specialized niche wearable applications in the medical and entertainment domains, we aim to identify the underlying characteristics of smartglass-enabled killer applications for everyday use. In this paper, we analyze intermediary roles in remote collaboration consisting of authoritative supervisors, synergetic collaborators, and speculative explorers. We also propose technical components for smartglass-assisted interactive remote collaboration composed of personal tracking, teleconference, and interaction components. More specifically, the application tasks of each intermediary role and objectives of three functional components are defined and elaborated.

• 동의신경정신과학회지
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• 제22권2호
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• pp.85-105
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• 2011

Objectives : The purpose of this study was to characterize the neuroprotective effects and anxiolytic-like effects of Gongjin-dan and Polygala japonica, Polygala tenuifolia, Acorus gramineus mixed pills(G.J.D-P.P.A.). Methods : The neuroprotective effects of G.J.D-P.P.A. determined by the passive avoidance and Y-maze tasks and Morris water maze task, and the anxiolytic-like effects of the G.J.D-P.P.A. using an elevated plus-maze(EPM) in mice. Results : Drug-induced amnesia was induced by treating animals with scopolamine(1 mg/kg, i.p.). A single G.J.D-P.P.A.(400 and 800 mg/kg) administration significantly enhanced cognitive function and attenuated scopolamine-induced cognitive impairments as determined by the passive avoidance and Y-maze tasks(P < 0.05) and also reduced escape-latency on the Morris water maze task(P < 0.05). The administration of GJD-PPA(400 and 800 mg/kg) significantly increased the percentage of time spent in open arms and entries into the open arms of the EPM compared with saline-treated control group(P < 0.05). Moreover, there were no changes in the locomotor activity and myorelaxant effects in any group compared with saline-treated control group. Conclusions : These results suggest that GJD-PPA dramatically possesses the anti-amnestic and cognitive-enhancing activities related to the memory processes, and promotes the anxiolytic-like activity in mice.

• 정보교육학회논문지
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• 제10권1호
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• pp.143-152
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• 2006

기업에서 실제로 수행된 블렌디드 학습(Blended Learning)의 효과성을 규명해보고 이를 토대로 온라인 학습과 오프라인 학습을 효과적으로 병행하기 위한 시사점을 도출하고자 본 연구가 수행되었다. 연구 목적을 달성하기 위해 블렌디드 학습의 효과성에 대한 설명적 혼합설계 방식으로 체제적 분석을 시도하였다. 블렌디드 학습의 효과에 대한 양적 분석 결과, 종합진단과 타인진단에서는 블렌디드 학습이 리더십 역량을 향상시키는데 유의미한 영향을 미치는 것으로 나타났고, 사후 설문조사 및 핵심 면담대상자집단과의 면담 결과 블렌디드 학습의 유용성을 확인할 수 있었다. 이러한 연구 결과를 바탕으로, 블렌디드 학습 방식으로 운영한 프로그램의 분석을 통해 블렌디드 학습 효과에 영향을 주는 특성을 분석하고, 블렌디드 학습의 효과성 검증에 대한 방향을 제시하고자 하였다.

• 말소리와 음성과학
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• 제11권3호
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• pp.9-21
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• 2019

본 연구에서는 북한이탈주민집단과 한국인집단의 운율특성을 비교하기 위하여 읽기과제(짧은글, 대화글)에서 3가지 문장 유형(평서문, 의문문, 부정문)에 따른 집단 간 음도범위와 청지각적 평가 결과의 차이가 있는지 살펴보았다. 또한, 북한이탈주민집단의 읽기과제의 3가지 문장 유형('평서문', '의문문', '부정문')의 청지각적 평가 결과와 북한이탈주민집단의 억양 자기평가 설문지의 4가지 하위유형('한국어지향도', '핸디캡정도', '한국어비유사성', '억양불만족정도')과의 상관을 살펴보고자 하였다. 본 연구의 대상자는 북한이탈주민집단 총 15명(여 11, 남 4)과 한국인집단 총 15명(여 11, 남 4)이다. 음향학적 평가에서 집단 간 읽기과제의 문장유형에 따른 차이를 확인하기 위해 삼원분산분석(three-way mixed ANOVA), 다변량분석(multivariate analysis)을 실시하였고, 청지각적 측면에 대한 분석방법으로는 비모수통계인 Mann-Whitney U Test를 사용하였다. 북한이탈주민의 억양자기평가 설문지의 하위유형 4개와 청지각적 평가의 하위유형 6가지('짧은글평서문', '짧은글의문문', '짧은글부정문', '대화글평서문', '대화글의문문', '대화글부정문')의 상관관계를 확인하기 위해 피어슨의 적률상관계수(Pearson's product moment correlation coefficient)를 산출하였다. 그 결과, 읽기과제의 모든 문장유형에서 북한이탈주민집단보다 한국인집단의 음도범위가 유의미하게 컸다. 두 번째로 집단 간 읽기과제에서 3가지 문장유형에 따른 청지각적 평가 결과, 모든 문장 유형에서 한국인집단에 비해 북한이탈주민집단의 청지각적 평가 점수가 유의미하게 낮았으며, '의문문'유형에서 점수가 가장 낮았다. 마지막으로 북한이탈주민집단의 읽기과제의 3가지 문장 유형의 청지각적 평가 결과와 억양자기평가 설문지의 하위유형간의 상관을 살펴본 결과, 설문지의 4가지 하위유형 중 '한국어지향도', '핸디캡정도', '한국어비유사성'과 3가지 문장 유형 중 '의문문'에서 유의한 상관이 나타났다. 따라서 본 연구를 통해, 북한이탈주민집단과 한국인집단의 읽기과제에서의 문장유형에 따른 음성이 청지각적으로, 음향학적으로 차이를 보이고 있음을 알 수 있으며, 한국어를 지향하고, 자신의 억양으로 인한 핸디캡이 높고, 자신의 억양이 한국어와 다르다고 생각하는 북한이탈주민일수록, '의문문'에서 가장 서울말에 가깝게 말하는 것으로 평가되었음을 알 수 있다.

• 한국대기환경학회지
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• 제24권4호
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• pp.455-469
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• 2008

VOCs (Volatile organic compounds) are known as one of the harmful chemicals, causing cancer and global warming. Therefore, the proper control, removal, and reduction of the emission of VOCs are important tasks for the environmental protection. Among the method of VOCs removal activated carbon bed is the most efficient and economical method. In this study, the adsorption performance of toluene gas was investigated using various activated carbons. To find out the adsorption efficiency, the H/D (Height/Diameter) of the activated carbon and GHSV (Gas Hourly Space Velocity) of the toluene gas were manipulated with various conditions. The effect of the temperature, humidity and toluene-MEK-IPA mixed gas on adsorption were also investigated. As a result, a high adsorption performance was found when GHSV is lower at room temperature and low humidity. It was also found that the adsorption efficiency of toluene-MEK-IPA mixed gas system was lower than that of toluene gas system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권11호
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• pp.3991-4010
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• 2021

The Question Similarity Measurement of Chinese Crop Diseases and Insect Pests (QSM-CCD&IP) aims to judge the user's tendency to ask questions regarding input problems. The measurement is the basis of the Agricultural Knowledge Question and Answering (Q & A) system, information retrieval, and other tasks. However, the corpus and measurement methods available in this field have some deficiencies. In addition, error propagation may occur when the word boundary features and local context information are ignored when the general method embeds sentences. Hence, these factors make the task challenging. To solve the above problems and tackle the Question Similarity Measurement task in this work, a corpus on Chinese crop diseases and insect pests(CCDIP), which contains 13 categories, was established. Then, taking the CCDIP as the research object, this study proposes a Chinese agricultural text similarity matching model, namely, the AgrCQS. This model is based on mixed information extraction. Specifically, the hybrid embedding layer can enrich character information and improve the recognition ability of the model on the word boundary. The multi-scale local information can be extracted by multi-core convolutional neural network based on multi-weight (MM-CNN). The self-attention mechanism can enhance the fusion ability of the model on global information. In this research, the performance of the AgrCQS on the CCDIP is verified, and three benchmark datasets, namely, AFQMC, LCQMC, and BQ, are used. The accuracy rates are 93.92%, 74.42%, 86.35%, and 83.05%, respectively, which are higher than that of baseline systems without using any external knowledge. Additionally, the proposed method module can be extracted separately and applied to other models, thus providing reference for related research.

• 한국보건간호학회지
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• 제32권2호
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• pp.221-234
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• 2018

Purpose: This mixed method study was conducted to analyze the changes in nursing students' practice environment due to comprehensive nursing care services. Methods: For the quantitative study, a checklist and practicum evaluation surveys completed by 85 students were analyzed using SPSS utilizing a Mann-Whitney U test. For the qualitative study, 13 students with experience of practice in comprehensive nursing care service units participated in focus group interviews. The data were analyzed using a content analysis method. Results: From the qualitative findings, four themes and eight sub-themes were identified. The four themes were , , , and . The quantitative findings found that students could observe and perform fewer nursing tasks and the students' satisfaction with practice was lower in the comprehensive nursing care service unit. Conclusion: This study was meaningful in that it analyzed the experiences of nursing students in comprehensive nursing care services.

• 한국경영과학회지
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• 제30권1호
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• pp.43-54
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• 2005

A flexible assembly line (FAL) is a production system that assembles various parts in unidirectional flow line with many constraints and manufacturing flexibilities. In this research we deal with a FAL balancing problem with the objective of minimizing the maximum workload allocated to the stations. However, almost all the existing researches do not appropriately consider various constraints due to the problem complexity. Therefore, this study addresses a balancing problem of FAL with many constraints and manufacturing flexibilities, unlike the previous researches. We use a genetic algorithm (GA) to solve this problem. To apply GA to FAL. we suggest a genetic representation suitable for FAL balancing and devise evaluation method for individual's fitness and genetic operators specific to the problem, including efficient repair method for preserving solution feasibility. After we obtain a solution using the proposed GA. we use a heuristic method for reassigning some tasks of each product to one or more stations. This method can improve workload smoothness and raise work efficiency of each station. The proposed algorithm is compared and analyzed in terms of solution quality through computational experiments.

• 아동학회지
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• 제18권2호
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• pp.283-297
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• 1997

This study examined the development of verbatim and gist memory, and the effects of the relevance and inferential direction of the task on the development of the verbatim and gist memory. The subjects were second, fourth and sixth grade children in elementary schools. Each age group consisted of forty children. Eight sets of inference tasks were administered to each subject. In the task, the relevent and the extraneous sentences were mixed for inferential direction. The sentences that described 'which term is more' were inserted in half of the task and the sentences that indicated the direct numbers were included in the other half of the task. The task was presented by the audio tape in which instruction was recorded by one speaker. Results showed that (1) age differences in verbatim memory were significant but age differences in gist memory were not significant. These results indicate that the processes of verbatim and gist memory are separate and independent. (2) The relevance and inferential direction of the task affect gist memory but no verbatim memory. This result also supported independence between verbatim and gist memory. It was suggested that these results can be interpreted in terms of fuzzy trace theory.

• 자원리싸이클링
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• 제16권4호
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• pp.47-60
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• 2007

현대생활은 플라스틱 없이는 성립되지 않으며, 폐플라스틱량도 방대하다. 한편 2003년부터 EPR(확대생산자책임)제도가 도입됨에 따라 생활계 혼합 폐플라스틱 발생량이 급증하였다. 플라스틱 리싸이클링에는 플라스틱-플라스틱 간의 선별이 기본으로 되어 있다. 플라스틱간의 선별기술 고도화가 폐플라스틱 재활용의 관건이라 하여도 과언이 아니다. 본고에서는 이와 같은 관점에서 플라스틱 상호선별에 초점을 맞추어, 연구동향과 실용화되어 있는 기술을 기술하고저 한다.