• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제6권12호
• /
• pp.3133-3151
• /
• 2012

The optimal price strategy selection of two bounded rational cognitive mobile virtual network operators (MVNOs) in a duopoly spectrum sharing market is investigated. The bounded rational operators dynamically compete to sell the leased spectrum to secondary users in order to maximize their profits. Meanwhile, the secondary users' heterogeneous preferences to rate and price are taken into consideration. The evolutionary game theory (EGT) is employed to model the dynamic price strategy selection of the MVNOs taking into account the response of the secondary users. The behavior dynamics and the evolutionary stable strategy (ESS) of the operators are derived via replicated dynamics. Furthermore, a reward and punishment mechanism is developed to optimize the performance of the operators. Numerical results show that the proposed evolutionary algorithm is convergent to the ESS, and the incentive mechanism increases the profits of the operators. It may provide some insight about the optimal price strategy selection for MVNOs in the next generation cognitive wireless networks.

• Molecules and Cells
• /
• 제42권1호
• /
• pp.28-35
• /
• 2019

Animals need to be able to alter their developmental and behavioral programs in response to changing environmental conditions. This developmental and behavioral plasticity is mainly mediated by changes in gene expression. The knowledge of the mechanisms by which environmental signals are transduced and integrated to modulate changes in sensory gene expression is limited. Exposure to ascaroside pheromone has been reported to alter the expression of a subset of putative G protein-coupled chemosensory receptor genes in the ASI chemosensory neurons of C. elegans (Kim et al., 2009; Nolan et al., 2002; Peckol et al., 1999). Here we show that ascaroside pheromone reversibly represses expression of the str-3 chemoreceptor gene in the ASI neurons. Repression of str-3 expression can be initiated only at the L1 stage, but expression is restored upon removal of ascarosides at any developmental stage. Pheromone receptors including SRBC-64/66 and SRG-36/37 are required for str-3 repression. Moreover, pheromone-mediated str-3 repression is mediated by FLP-18 neuropeptide signaling via the NPR-1 neuropeptide receptor. These results suggest that environmental signals regulate chemosensory gene expression together with internal neuropeptide signals which, in turn, modulate behavior.

• International Journal of Advanced Culture Technology
• /
• 제9권2호
• /
• pp.18-31
• /
• 2021

The purpose of the present study was to present evidence for driving interventions for the elderly by conducting programs that can improve visual perception and cognitive function in a driving simulator for elderly drivers and analyse their effects. Three elderly subjects who were 65 years or older, did not have physical and cognitive impairments, and were able to drive themselves participated in the present study. A total of 12 intervention sessions, of which subjects participated in 10 sessions of nine different visual perception and cognitive function programs available in a driving simulator, were conducted and pre- and post-program assessments were conducted (two assessments in total). The assessments included the evaluation of visual perception, frontal lobe function, concentration, safe driving behaviour, and self-efficacy. The results showed positive effects of the driving simulator program on the visual perception, frontal lobe function, concentration, safe driving behaviour, and self-efficacy of all subjects. Changes in the simulator results showed remarkable improvement in the response evaluation, judgment evaluation, and predictive power evaluation, but showed difficulties in interference tasks and depth perception in common. The results showed positive effects of driving simulator training on the driving ability of the elderly, and consistent provision of such training is expected to improve the quality of life of the elderly by securing the safety of driving and actively supporting social participation.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제17권12호
• /
• pp.3266-3285
• /
• 2023

With the popularity of online learning, intelligent tutoring systems are starting to become mainstream for assisting online question practice. Surrounded by abundant learning resources, some students struggle to select the proper questions. Personalized question recommendation is crucial for supporting students in choosing the proper questions to improve their learning performance. However, traditional question recommendation methods (i.e., collaborative filtering (CF) and cognitive diagnosis model (CDM)) cannot meet students' needs well. The CDM-based question recommendation ignores students' requirements and similarities, resulting in inaccuracies in the recommendation. Even CF examines student similarities, it disregards their knowledge proficiency and struggles when generating questions of appropriate difficulty. To solve these issues, we first design an enhanced cognitive diagnosis process that integrates students' affection into traditional CDM by employing the non-compensatory bidimensional item response model (NCB-IRM) to enhance the representation of individual personality. Subsequently, we propose an affection-enhanced personalized question recommendation (AE-PQR) method for online learning. It introduces NCB-IRM to CF, considering both individual and common characteristics of students' responses to maintain rationality and accuracy for personalized question recommendation. Experimental results show that our proposed method improves the accuracy of diagnosed student cognition and the appropriateness of recommended questions.

• 경영과학
• /
• 제29권2호
• /
• pp.105-125
• /
• 2012

As medical service industry is transformed into the market centered on consumers, medical service quality patients recognize is emphasized as the powerful means to ensure competitive advantage among hospitals in the fierce medical markets. Many researches have been done on the definition of medical service quality, developing a scale to measure it, patient satisfaction, hospital repurchase and oral transmission intention, but integrated studies have not been done sufficiently on the patient' cognitive emotional aspects. For these research purposes, based on service relation, service quality, physical surroundings, human services, corporate reputation, service value, emotional response, customer satisfaction and repurchase intention, this paper suggests a theoretical modeling composed of hypotheses on the relations of each theoretical variable. In addition, the moderating effect of service relationships is investigated based on the structural equation model.

• 한국융합학회논문지
• /
• 제9권8호
• /
• pp.77-85
• /
• 2018

본 연구는 일 지역 내 요양병원의 경도인지장애환자의 일반적 특성, 입원 및 진료특성을 분석하여 경도인지장애 환자에 대한 효율적 관리에 필요한 자료를 제공하고자 시행하였다. 연구대상은 2016년 일 지역에 소재하는 요양병원에서 경도인지장애(F067)를 주진단으로 하는 입원환자 303명의 명세서 건이다. 본 연구결과, 재원일수는 계절별로는 ADL 6~12점, ADL 13~20점 그룹 모두 겨울이 가장 긴 것으로 나타났다. 진료결과는 ADL 6~12점, ADL 13~20점 그룹 모두 퇴원일 때 재원일수가 긴 것으로 나타났다. 총 진료비는 계절별로는 ADL 6~12점, ADL 13~20점 그룹에서 겨울이 높았다. 환자 분류군는 ADL 4~5점 그룹에서는 인지장애군의 진료비가 가장 높았고, ADL 6~12점, ADL 13~20점 그룹 모두 문제행동군이 가장 높은 것으로 나타났다. 이와 같은 결과 경도인지장애에 대한 조기발견과 치료는 잠재적인 치매환자 발생과 그에 따른 사회적 비용 감소에 효과적인 방안이자 대단히 중요한 과제임을 알 수 있다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• 제27권3호
• /
• pp.196-206
• /
• 2016

Objectives: Individuals with autism spectrum disorder (ASD) are considered to have problems with empathy. It has recently been suggested that there are two systems for empathy; cognitive and emotional. We aimed to investigate the neural response to cognitive and emotional empathy and elucidate the neurobiological aspects of empathy in patients with ASD. Methods: We recruited patients with ASD (N=17, ASD group) and healthy controls (HC) (N=22, HC group) for an functional magnetic resonance imaging study. All of the subjects were scanned while performing cognitive and emotional empathy tasks. The differences in brain activation between the groups were assessed by contrasting their neural activity during the tasks. Results: During both tasks, the ASD group showed greater neural activities in the bilateral occipital area compared to the HC group. The ASD group showed more activation in the bilateral precunei only during the emotional empathy task. No brain regions were more activated in the HC group than in the ASD group during the cognitive empathy task. While performing the emotional empathy task, the HC group exhibited greater neural activities in the left middle frontal gyrus and right anterior cingulate gyrus than the ASD group. Conclusion: This study showed that the brain regions associated with cognitive and emotional empathy in ASD patients differed from those in healthy individuals. The results of this study suggest that individuals with ASD might have defects both in cognitive empathy and in emotional empathy.

• 한국산학기술학회논문지
• /
• 제19권12호
• /
• pp.584-591
• /
• 2018

본 연구는 우리나라 100세 이상 고령자의 인지기능장애 수준을 알아보고 그의 관련요인을 규명해 보고자 시도하였다. 연구대상은 2016년부터 2017년까지의 기간 동안에 국민건강보험공단에서 시행하는 건강검진 및 장기요양 인정조사를 받은 주민등록상의 100세 이상 고령자 268명(남성 132명, 여성 136명)으로 하였다. 연구결과, 조사대상 100세 이상 고령자의 인지기능장애수준은 남성보다 여성에서(p=0.000), 혼자 산다는 군보다 배우자나 자녀와 함께 산다는 군에서(p=0.019), 가정의 경제 상태가 낮을수록(p=0.001), 비만도가 낮을수록(p=0.000), 비흡연군보다 흡연군에서(p=0.000), 비음주군보다 음주군에서(p=0.013), 규칙적인 운동을 한다는 군보다 하지 않는다는 군에서(p=0.020)에서 유의하게 낮았다. 조사대상 100세 이상 고령자의 확정적 인지기능장애가 나타날 위험비는 남성보다 여성(ORs=9.85, 95% CI=2.88~33.59)에서 유의하게 증가하였고, 저체중군보다 비만군(ORs=0.25, 95% CI=0.07~0.86)에서, 흡연군보다 비흡연군(ORs=0.30, 95% CI=0.10~0.83)에서 유의하게 감소하였다. 조사대상 100세 이상 고령자의 인지기능장애에 영향을 미치는 요인으로는 성, 거주상태, 경제상태, BMI, 흡연상태가 유의한 변수로 선정되었다. 이상과 같은 연구결과를 보면, 조사대상 100세 이상 고령자의 인지기능장애 수준은 여러 인구사회학적 및 건강관련행위특성 변수에 따라 유의한 차이를 보이고 있었다. 특히 흡연, 음주 및 규칙적인 운동 등과 같은 건강관련행위특성이 좋지 않은 군에서 인지기능 수준이 저하됨을 시사하고 있다.

• 한국프랜차이즈경영연구
• /
• 제13권1호
• /
• pp.35-46
• /
• 2022

Purpose: With the rapid changes in the technical development and the trend of consumption trend, the convenience store industry is facing an unprecedented competitive situation in the consumption environment where the boundary between online and offline is broken due to the stagnation of offline distribution channels and the spread of online shopping. The biggest innovation strategy of the major convenience store brands in recent years are introducing the O2O (Online to Offline) platform and presenting new products and services beyond the boundaries of online and offline to transform themselves into Omni Channel stores. The study is designed to analyze the effect of innovativeness of convenience store as a stimulus in O2O platform which customers perceive on store loyalty, the final response to external stimuli, through customer engagement with convenience store brands. Specifically, the innovativeness of convenience stores was divided into types of core activities in corporate marketing and focused on innovations in services, products(proposals), promotions and experiences. Research design, data, and methodology: Various hypotheses have been developed to achieve this research purpose. The data were collected from 1,128 questionnaires the age between 15 and 60 who had experience using retail store apps and delivery apps and were analyzed using SPSS 22.0 and SmartPLS 3.3.7 program. Measurement model analysis was carried out to assess convergent and discriminant validity. Also, common method bias was tested using the values of VIF (variance inflation factor). The hypotheses were tested using structural equation modeling with SmartPLS 3.3.7 program. Results: First, service innovation has a positive effect on cognitive engagement. Second, product, promotion and experience innovation have a positive effect on cognitive and affective engagement. Third, cognitive influences affective engagement. Finally, both cognitive and affective engagement affect store loyalty, but affective engagement has a stronger effect on store loyalty than cognitive engagement. Conclusions: All four types of innovation and cognitive engagement have a positive effect on emotional engagement, which has a stronger effect on store loyalty than cognitive engagement. Thus, while innovation can build loyalty through emotional engagement, innovation strategies must be designed and pursued with caution in terms of impact through cognitive engagement may not achieve the planned goals.

• 한국과학교육학회지
• /
• 제27권1호
• /
• pp.18-27
• /
• 2007

이 연구에서는 변칙사례에 의해 유발된 인지갈등과 비인지적 변인이 개념변화 과정에 미치는 영향과 변칙사례가 상황 흥미를 유발하는 과정을 조사하였다. 중학교 1학년 학생들이 연구에 참여하였다. 밀도 개념에 대해 오개념을 지닌 학생들을 선별하기 위해 선개념 검사를 실시하였다. 변칙사례에 대한 인지적 반응검사와 상황 흥미 검사를 실시하였다. CAl 프로그램을 통해 학습하게 한 후, 주의집중 검사, 노력 검사, 개념 검사를 실시하였다. 경로 분석 결과, 변칙사례에 의해 유발된 인지갈등이 상황 흥미를 유발하고 이것이 개념학습 과정에서의 학생들의 주의집중과 노력에 영향을 미쳐 개념변화를 일으키는 것으로 나타났다. 변칙사례에 의해 처음으로 유발되는 것은 새로움이며, 새로움은 직접적으로 또는 주의집중 요구, 탐구 의도, 순간적 즐거움을 경유하여 상황 흥미를 불러일으키는 것으로 나타났다. 새로움은 도전에 직접적인 영향을 주고, 도전은 직접적으로 또는 인지갈등을 통해 순간적 즐거움에 부정적인 영향을 줌으로써 전체 흥미를 감소시키기도 하였다. 그러나 이 경로의 계수는 전자의 경로의 계수보다 상대적으로 작았다. 이에 대한 교육적 함의를 논의하였다.