• Journal of Information Technology Applications and Management
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• 제29권5호
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• pp.13-25
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• 2022

The purpose of this study is to explore the factors that influence the purchase of AI speakers in China. We integrate the Unified Theory of Acceptance and Use of Technology (UTAUT) and Task-technology fit (TTF) model into one model and put forward assumptions. According to the characteristics of AI speakers, we selected 6 independent variables, such as Performance Expectation, Effort Expectation, Social Influence, Facilitating Conditions, Task and Technology-characteristics. The final impact on purchase behavior is evaluated through Task-technology fit and purchase intention. After counting 478 samples, through SPSS22.0 and AMOS analysis, hypotheses have been proved by strong experimental data, except facilitating conditions. These results also imply that improving the technical level of AI speakers and enhancing consumers' purchasing intention are the central line of marketing. Based on this, we put forward several suggestions to marketers, including strengthening the research and development of AI speaker technology, and building a circle of friends of AI speakers.

• 한국정보시스템학회지:정보시스템연구
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• 제28권4호
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• pp.1-25
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• 2019

Purpose The purpose of this study is to investigate cognitive mechanism of goal relations (Single-goal vs. Multiple-goals) and to-do list (Packing vs. Unpacking) and also verify the role of self-efficacy in the perspective of motivation belief. The perspective of cognitive mechanism is related to the effects of how the relations of multitasking environments affects to facilitating relation or conflicting relations. In pursuit of a single goal, judgement of task importance can be facilitated by unpacking effect due to relations of strongly associated project components including to-do list. On the other hands, in pursuit of multiple goals, judgement of task importance can be conflicted due to mutually exclusive relations of multiple goals. Additionally, the cognitive mechanism can be regulated from the role of self-efficacy, which contributes to motivation belief on how much a person is confident in achieving given tasks. In the end this research is to identify self-efficacy as boundary condition in inhibiting the effects of facilitation and conflict. Design/methodology/approach This study conducted Two-way ANOVA (Packing/ Unpacking * Single-goal/ Multiple-goals) to explore the effects of cognitive mechanism on task importance. After that we performed Three-way ANOVA, 2 (To-do list: Packing/ Unpacking) * 2 (Goal relation: Single-goal/ Multiple-goals) * 2 (Self-efficacy: Low self-efficacy/ High self-efficacy) to verify the role of self-efficacy between goal relations and to-do list. Findings In the cognitive mechanism, the task importance is not significantly different between in packed and in unpacked condition in pursuit of a single goal. But multitasking with multiple goals causes goal conflict, which means packed condition indicates significantly higher task importance than unpacked condition. Additionally, for a group with low self-efficacy unpacking leads to conflicting relation, which implies that packed condition is more efficient strategy than packed condition. On the other hands, in pursuit of mulitple goals, either packing or unpacking has no distinctive effects on task importance. However, participants with high self-efficacy are no longer affected by facilitating relation and conflicting relation as well in pursuit of either a single goal or multiple goals as well.

• 한국정보시스템학회지:정보시스템연구
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• 제19권3호
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• pp.105-126
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• 2010

Many organizations have spent huge investments on information systems (IS) but are unable to achieve the maximum benefits expected. The problem of system underutilization of implemented IS is a major factor that causes the lackluster returns on organizational investments in IS. In light of the need for solutions to underutilization, researchers are beginning to explore IS infusion to enhance task performance. IS infusion is the extent to which an individual fully uses the system to enhance his or her task performance. So far, there has yet to be any significant finding or theory to explain the phenomenon. Therefore this study offers a conceptual framework on IS infusion based on the socio-technical system perspective. Particularly, this study investigates the influence of job fit, task competence, technology competence, self-determination with technology and self-determination with task on IS infusion. The analysis following the collection of empirical data found that job fit and self-determination with technology are positively related to IS infusion. This study serves as a basis for future research and suggests important implication to managers and system designers in promoting IS infusion.

• 대한수학교육학회지:수학교육학연구
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• 제25권4호
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• pp.675-690
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• 2015

본 연구는 초등 예비교사에게 필요한 수학지식을 가르치는 효과적인 수단으로서 수학적 과제의 특징을 논의하고 그에 맞게 과제를 설계하고 교사교육에 실행한 사례를 제시하였다. 그 결과 예비교사들은 '격자점 정삼각형 만들기' 라는 수학적 과제를 해결하면서, 주어진 상황을 수학적 문제로 변환하고 기존 지식과의 연결을 통해 문제를 변형하고 해결하며, 기존의 수학적 개념을 새로운 관점에서 보는 경험을 할 수 있었다. 이러한 경험이 예비교사의 교육에 대한 관점의 변화와 어떻게 연결되는지 그리고 교사교육에 적합한 수학적 과제 설계를 위한 조건에 대해 논의하였다.

• Asia pacific journal of information systems
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• 제16권2호
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• pp.47-67
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• 2006

This study takes a quantitative approach to the influence of TTF (Task-Technology Fit) on the individual's use and performance of GSS (Group Support Systems), while traditional studies on TTF have taken the experimental approach to explore the characteristic fit between diverse tasks and technologies. We have the following two research inquires: Are the IS use and performance maximized when information technologies are provided by the exact amount of demand?; and, Does TTF at the high level between task and IT produce better IS use (or performance) than at the low level? To investigate these issues, we use the polynomial regression analysis and response surface methodology of Edwards (1993) instead of traditional direct measure of TTF. This method measures the degree of desired and actual level of information technologies in conducting tasks, and traces the dynamic changes of dependent variables (IS use and performance) according to the variances of each independent variable. Our results conclude that user's IS use and performance are maximized when information technologies are actually provided by no more or less than the desired level. We also found that TTF at the high level promotes better IS use and performance than TTF at the low level.

• International Journal of Advanced Culture Technology
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• 제5권1호
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• pp.83-89
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• 2017

In this paper, we propose an extended method of one-hot Long Short-Term Memory (LSTM) and evaluate the performance on spam filtering task. Most of traditional methods proposed for spam filtering task use word occurrences to represent spam or non-spam messages and all syntactic and semantic information are ignored. Major issue appears when both spam and non-spam messages share many common words and noise words. Therefore, it becomes challenging to the system to filter correct labels between spam and non-spam. Unlike previous studies on information filtering task, instead of using only word occurrence and word context as in probabilistic models, we apply a neural network-based approach to train the system filter for a better performance. In addition to one-hot representation, using term weight with attention mechanism allows classifier to focus on potential words which most likely appear in spam and non-spam collection. As a result, we obtained some improvement over the performances of the previous methods. We find out using region embedding and pooling features on the top of LSTM along with attention mechanism allows system to explore a better document representation for filtering task in general.

• Asia pacific journal of information systems
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• 제31권1호
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• pp.43-75
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• 2021

Clearly, the smartphone is increasingly playing a greater role in everyday life, thus providing opportunities to evaluate how well the use of the smartphone meets the requirements of undergraduate students in independent learning outside of a classroom setting. This study used the task-technology fit (TTF) model to explore the effectiveness of smartphone usage to interact with learning materials in independent learning outside of classrooms, the need for smartphone support, and the fit of devices to tasks as well as performance. First, the study used interviews, observation, and survey data to identify what are the most important constructs of smartphones that stimulate students to interact with learning materials in independent learning outside of classrooms. Based on the findings from the exploratory study and Task Technology Fit theory, we postulated the Navigation design, Ergonomic design, Content support, and Capacity as the essential dimension of the smartphone construct. Then, we proposed a research model and empirically tested hypotheses with the structural model analysis. The results reveal a significant positive impact of task and technology on TTF for smartphone usage to interact with learning materials in independent learning outside of classrooms; it also confirmed the TTF and performance have a direct effect on actual use.

• 한국콘텐츠학회논문지
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• 제20권9호
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• pp.150-157
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• 2020

본 연구는 PBL 환경에서 과제참여 수준에 대한 몰입의 영향을 문제해결력이 매개하는지 탐색하기 위해서 수행되었다. 본 연구의 대상은 교육방법 및 교육공학 수강하는 예비유아교사 60명의 학생들을 대상으로 하였다. 연구를 위해서 몰입, 문제해결력, 과제참여 수준을 설문을 통해서 자료를 수집하였다. 수집된 자료는 SPSS Macro 및 부트스트래핑(bootstrapping)방법을 사용하여 과제참여 수준에 대한 몰입의 영향에 대해 문제해결력이 매개 효과를 분석하였다. 그 결과, 과제참여 수준에 대해 몰입의 영향이 정적인 것으로 나타났으며, 문제해결력이 .292 수준에서 간접효과가 있는 것으로 나타났다. 이는 과제참여 수준에 대한 몰입의 영향을 문제해결력이 매개하는 것으로 검증되었다. 이와 같은 연구결과를 통해서 PBL 활동에서 문제해결력 지원을 통해 과제참여 수준을 향상할 수 있는 시사점을 제시할 수 있다.

• The Journal of Korean Physical Therapy
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• 제33권3호
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• pp.136-141
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• 2021

Purpose: Dementia is a disease in which cognitive function declines, leading to deterioration of body functions and activities of daily living. The purpose of this study is to explore the effects of dual-task training, including cognitive tasks, on cognitive and body function and β-amyloid levels in Alzheimer's dementia patients. Methods: 34 inpatients diagnosed with Alzheimer's dementia at a nursing hospital located in South Korea. The patients were randomly divided into a dual-task group (n=16) and a single-task group (n=18). Each group was trained for 30 minutes three times a week for eight weeks. The MMSE-K was used to measure the patients' cognitive function. To assess the patients' static balance ability, their LOS was measured using BioRescue. while dynamic balance was measured using the BBS. The 10MWT were conducted to evaluate the patients' walking ability. Blood analysis was performed to measure levels of β-amyloid. Results: Both groups exhibited statistically significant improvements in gait function after the training (p<0.05). The dual-task group exhibited statistically significant differences in cognitive function, static and dynamic balance function, and β-amyloid levels after training (p<0.05). A significant difference was observed between the two groups (p<0.05). Conclusion: Dual-task training were found to be effective in improving cognitive and bodily functioning and reducing β-amyloid levels in Alzheimer's dementia patients. Thus, this may be suggested as an effective exercise method for the treatment and early prevention of Alzheimer's dementia.

• 한국식품과학회지
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• 제48권5호
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• pp.479-485
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• 2016

본 연구에서는 시판 물냉면 육수에 대해 분류기법을 이용하여 감각적 특성을 바탕으로 제품들이 인지되는 양상을 이해하고자 하였다. 그 결과, 소비자들이 시판 물냉면 육수 제품 시장을 인지하는데 있어 익숙한 제품과 익숙하지 않은 제품으로 크게 분류되는 것을 알 수 있었다. 제품에 사용된 재료 및 함량이 크게 차이가 남에도 불구하고 대기업 제품들 및 우리나라에서 처음 시판된 물냉면 육수 제품은 상대적으로 유사하게 인지되는 것으로 나타났다. 반면 노출빈도가 낮아 친숙함이 떨어지는 중소기업 제품들의 경우, 대기업 제품들 및 우리나라에 최초로 시판된 제품과 구별되어 인지되는 것을 알 수 있었다. 또한 제품의 사용방식이 농축방식인 경우 그렇지 않은 제품들과 크게 구별되는 것으로 나타나 가공방식에 의한 영향도 엿볼 수 있었다. 물냉면 육수제품들은 신맛과 관련된 묘사 용어에 의해 주로 묘사되었으나, 이에 의해 제품이 구별되지는 않았다. 분류기법을 수행하는 데 있어 훈련된 경험이 있는 사람들을 패널에 포함함으로써 소비자 패널만을 이용한 분류기법에서 지적되어 온 용어의 유효성에 대한 문제점을 다소 극복할 수 있는 것으로 보인다.