• 한국수학교육학회지시리즈C:초등수학교육
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• 제20권2호
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• pp.143-151
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• 2017

본 연구는 수학포기자가 사회적 이슈로 대두되면서 실시한 수학학습 실태조사 데이터를 활용하여 초등학생 수학학습 포기 인식과 연관성이 높은 정의적 영역 요인과 정의적 영역 검사 문항을 추출하였다. 데이터 분석을 위하여 R의 빅데이터 분석 기법을 통해 기계학습 분석과 연관성 분석을 하였다. 그 결과 정의적 영역 요인 중에서는 효능감, 흥미 등이 가장 연관성이 높은 것으로 나타났다. 또한 정의적 영역 문항 중에서는 수학학습 포기 인식과 흥미 요인의 문항인 '나는 수학이 좋다'와 효능감 문항인 '나는 앞으로 수학을 더 잘할 수 있을 것이라 생각한다' 등 8문항을 순위별로 추출하여 초등학생을 대상으로 하는 정의적 영역 검사 간편 버전을 추출하였다. 본 연구에서 나온 결과는 초등학생의 정의적 영역 함양을 위한 지도에 있어서 보다 중점을 두어야 하는 사항을 시사할 것이다. 또한 본 연구에서 개발한 간편 버전은 향후 초등학생을 대상으로 하는 정의적 영역 검사에 활용될 것으로 본다.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제31권2호
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• pp.187-201
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• 2017

본 연구는 우리나라 초 중 고 학생들의 수학학습 실태 조사 연구의 일환으로 시도되었다. 본 연구는 수학학습에 영향을 미칠 수 있는 가치, 흥미, 학습태도, 외적 동기, 내적 동기, 학습의지, 효능감 등 7개의 정의적 요인을 가지고 분석하였다. 로지스틱 회귀분석을 통해 추출한 결과 '효능감'이 초 중 고 학생 모두에게 가장 영향을 많이 미치는 요인으로 나타났다. 또한 인과 모형으로 분석한 결과에 따르면, 학생들이 수학에 대한 '가치'를 인식할 때 '외적/내적동기'가 발생하고, 두 동기는 수학에 대한 '흥미'와 '학습의지'를 높이며, 마지막으로 긍정적인 '학습태도'와 '효능감'을 발달시킨다는 사실을 확인할 수 있었다. 또한 학교급이 높아질수록 외적동기의 영향력이 강해지는 반면에 초등학생인 경우 외적 동기가 흥미로 이어지지 않았으며, 초등학생과 중학생의 경우 '흥미'가 수학 포기여부에 영향을 준 주요 매개 변인으로 나타났다. 본 연구에서 제시한 경로 분석 연구 결과는 정의적 영역의 각 요소가 어떤 경로로 수학포기에 이르는가를 분석한 것으로, 향후 학생들의 수학 학습 지도에 중점을 두어야 할 사항과 우선순위를 두고 접근해야하는 요소 등에 대한 시사점으로 활용할 수 있을 것으로 기대한다.

• Journal of Communications and Networks
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• 제15권5호
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• pp.486-495
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• 2013

In this article, we suggest a two-dimensional genetic algorithm (GA) method that applies a cognitive radio (CR) decision engine which determines the optimal transmission parameters for multicarrier communication systems. Because a CR is capable of sensing the previous environmental communication information, CR decision engine plays the role of optimizing the individual transmission parameters. In order to obtain the allowable transmission power of multicarrier based CR system demands interference analysis a priori, for the sake of efficient optimization, a two-dimensionalGA structure is proposed in this paper which enhances the computational complexity. Combined with the fitness objective evaluation standard, we focus on two multi-objective optimization methods: The conventional GA applied with the multi-objective fitness approach and the non-dominated sorting GA with Pareto-optimal sorting fronts. After comparing the convergence performance of these algorithms, the transmission power of each subcarrier is proposed as non-interference emission with its optimal values in multicarrier based CR system.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제18권1호
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• pp.26-30
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• 2007

This practice parameter for non-pharmacological treatment for attention-deficit hyperactivity disorder (ADHD) review the domestic and international literature on the psychosocial treatment of children and adolescents with ADHD. This parameter include the parental training & education, cognitive behavior therapy(group or individual), social skill training, family therapy, play therapy (individual psychotherapy) and non-traditional therapy (art therapy, herbal therapy et al). Among them, there is some proven evidence only in parental training & education and cognitive behavior therapy. So, this parameter describes some details only in the field of parental training & education and cognitive behavior therapy. The efficacy or effectiveness, especially, cost-effectiveness of specific psychosocial treatment method for ADHD cannot be fairly assessed due to the scarcity of controlled clinical data. Based on the clinical expert consensus and limited evidence, we cautiously suggest the practice recommendations about the non-pharmacological psychosocial treatment fur children and adolescents with ADHD.

• 한국보건간호학회지
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• 제32권1호
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• pp.81-95
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• 2018

Purpose: This study was conducted to identify the effects of a group cognitive improvement program on cognitive function, depression and self-esteem in elderly individuals with mild cognitive impairment. Methods: This was an experimental study that employed a pre-post design of a non-equivalence control group. The subjects were 52 elderly people with mild cognitive impairment, 25 of whom were assigned to the experimental group and 27 to the control group. The program was conducted for a total of 12 sessions for 60 minutes each. Data were analyzed using the ${\chi}2-test$, Fisher's exact test, and Independent t-test with the SPSS 20.0 program. Results: After the intervention, the group who participated showed improvement in all areas of cognitive function based on MMSE-KC (F=26.37, p.<0.001), the Rey Complex Figure Test: copy (F=20.66, p.<0.001), Immediate memory of Seoul Verbal Learning Test-Elderly's version (F=29.68, p.<0.001), delayed memory (F=45.79 p.<0.001), memory recall (F=28.97, p.<0.001), Forward of Digit Span Test (F=9.25, p=.004), backward (F=8.33, p.=0.006), language comprehension (F=13.42, p.<0.001), and digit symbol coding (F=17.74, p.<0.001) relative to the control group. Moreover depression (F=24.09, p.<0.001) was decreased in program participants, whereas self-esteem (F=40.24, p.<0.001) was increased. Conclusion: The program could be a useful intervention because the results show that the group cognitive improvement program has a significant effect on cognitive function, depression and self-esteem in elderly with mild cognitive impairment.

• 대한간호학회지
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• 제47권1호
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• pp.1-13
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• 2017

Purpose: The purpose of this study was to examine the effects of a cognitive training program on neurocognitive task performance and activities of daily living (ADL) in patients who had a stroke. Methods: The research design for this study was a nonequivalent control group non-synchronized design. Patients were assigned to the experimental (n=21) or control group (n=21). The experimental group received a 4-week cognitive training program and usual care (i.e., rehabilitation service), while the control was received usual care only. Cognitive function was measured with a standardized neurocognitive test battery and ADL was assessed at baseline and one and two months after completion of the intervention. Repeated measures ANOVA was used to determine changes in cognitive function and ADL over 2 months. Results: The interaction of group and time was significant indicating that the experimental group showed improvement in attention, visuospatial function, verbal memory, and executive function compared to the control group which had a sustained or gradual decrease in test performance. A significant group by time interaction in instrumental ADL was also found between the experimental group with gradual improvement and the control group showing no noticeable change. Conclusion: Findings show that the cognitive training program developed in this study is beneficial in restoring cognitive function and improving ADL in patients following a stroke. Further study is needed to investigate the long-term relationship between cognitive training participation and cognitive improvement and effective functioning in daily living.

• 한국프랜차이즈경영연구
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• 제12권3호
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• pp.47-58
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• 2021

Purpose: In general, franchise business models can generate higher returns and profits than non-franchise businesses. Therefore, it is necessary to study customer-based foodservice franchise brand awareness and service quality. The purpose of this study is to investigate the effect of service quality and brand awareness of foodservice franchises on attitudes divided into cognitive and affective attitudes and revisit intentions. Through this study, we intend to establish a structure that leads to service quality and brand awareness-cognitive attitude and affective attitude-loyalty. Research design, data, and methodology: In order to verify the hypothesis of this study, the survey was conducted among general consumers over the age of 20 who had visited a foodservice franchise within the last 3 months. Among the collected questionnaires, one insincere questionnaire was excluded, and 299 copies were used for analysis. The data collected to verify the hypothesis of this study were analyzed using SPSS 24.0 and AMOS 24.0. Result: First, it was found that the service quality of the foodservice franchise had a positive (+) effect on the cognitive attitude, and the service quality of the foodservice franchise had a statistically significant positive effect on the affective attitude. Second, the brand awareness of the foodservice franchise was found to have a statistically significant positive (+) effect on the cognitive attitude. and the brand awareness of the foodservice franchise had a statistically significant positive (+) effect on the affective attitude as well. Third, cognitive attitude was found to have a statistically significant positive (+) effect on loyalty, and affective attitude was also found to have a statistically significant positive (+) effect on loyalty. Conclusions: First, this study applied the S-O-R theory to the effect of service quality and brand recognition on cognitive attitude, affective attitude, and loyalty. Second, the structure leading to service quality and brand awareness-cognitive attitude and affective attitude-revisit intention was established. Third, attitudes in this study were divided into cognitive attitudes and affective attitudes. In general, attitude is studied as a single dimension as a cognitive attitude, but in this study, attitude was studied by dividing it into a cognitive dimension and an affective dimension

• ETRI Journal
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• 제43권5호
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• pp.869-880
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• 2021

Herein, we estimate the direction of arrival (DOA) of non-Gaussian signals for nested arrays (NAs) by implementing the fourth-order difference co-array (FODC) and successive methods. In particular, considering the property of the fourth-order cumulant (FOC), we first construct the FODC of the NA, which can obtain O(N⁴) virtual elements using N physical sensors, whereas conventional FOC methods can only obtain O(N²) virtual elements. In addition, the closed-form expression of FODC is presented to verify the enhanced degrees of freedom (DOFs). Subsequently, we exploit the vectorized FOC (VFOC) matrix to match the FODC of the NA. Notably, the VFOC matrix is a single snapshot vector, and the initial DOA estimates can be obtained via the discrete Fourier transform method under the underdetermined correlation matrix condition, which utilizes the complete DOFs of the FODC. Finally, fine estimates are obtained through the spatial smoothing-Capon method with partial spectrum searching. Numerical simulation verifies the effectiveness and superiority of the proposed method.

• 치위생과학회지
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• 제19권3호
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• pp.170-180
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• 2019

Background: Recently, competency-based education has been reorganized in the dental hygiene curriculum. In education, non-cognitive factors are emphasized. Grit, the non-cognitive ability to persevere to achieve an individual's long-term goals, is emerging. This study aims to identify the degree of grit and core competencies in students and to investigate the relationship between them and the factors that affect these core competencies. Methods: This study was conducted using 350 dental hygiene students who were randomly assigned a structured questionnaire to complete. The final analysis included 321 students. The survey contents evaluated grit, core competencies, and general characteristics. The difference in the degree of grit and core competencies in conjunction with the general characteristics of the subjects was analyzed using the t-test/Mann Whitney U-test and the ANOVA/Kruskal-Wallis H test. Multiple regression analysis was then conducted to determine the factors affecting the core competencies of the subjects. Results: The difference of 'grit' according to general characteristics was statistically significant in 'major satisfaction', 'relationship', 'perceived academic achievement', 'grade point average (GPA)'. The difference in 'core competency' according to general characteristics was statistically significant in 'grade', 'department selection', 'major satisfaction', 'relationship', 'perceived academic achievement', 'GPA'. Among the sub-areas of 'grit', 'perseverance of effort' showed a high correlation with 'core competency' and was statistically significant. As a result of regression analysis, 'major satisfaction', 'perceived academic achievement' and 'grit' of dental hygiene students had a statistically significant influence on 'core competency'. Meanwhile, 'GPA' was not seen to be statistically significant in 'core competency'. Conclusion: Grit, a non-cognitive factor, had a statistically significant effect on core competency, while the effects on GPA, a cognitive factor, were not statistically significant. Among the sub-factors of grit, 'perseverance of effort' had a statistically significant effect on 'problem-solving competency' and 'academic competency', which are 'core competency' sub factors.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권6호
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• pp.2838-2858
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• 2019

Traditional channel models for vehicle-to-vehicle (V2V) communication usually assume fixed velocity in static scattering environment. In the realistic scenarios, however, time-variant velocity for V2V results in non-stationary statistical properties of wireless channels. Dynamic scatterers with random velocities and directions have been always utilized to depict the non-stationary statistical properties of the channel. In this paper, a non-stationary geometry-based cooperative scattering channel model is proposed for multiple-input multiple-output (MIMO) V2V communication systems, where a birth-death process is used to capture the appearance and disappearance dynamic properties of moving scatterers that reflect the time-variant time correlation and Doppler spectrum characteristics. Moreover, our model has more straight and concise to study the impact of the vehicular traffic density on channel characteristics and thus avoid complicated procedure in deriving the analytical expressions of the channel parameters and functions. The numerical results validate our analysis and demonstrate that setting important parameters of our model can appropriately build up more purposeful measurement campaigns in the future.