• 한국운동역학회지
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• 제22권2호
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• pp.253-259
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• 2012

The purpose of this study was to determine how smartphone use posture affects biomechanical variables and muscle activities. Eleven university students(age: $22.2{\pm}2.6$ yrs, height: $176.6{\pm}4.7$ cm, weight: $69.5{\pm}7.5$ kg) who have no musculoskeletal disorder were recruited as the subject according to having experience in using the smartphone for more than one year. Angular velocity, muscle activity, and thumb finger pressure were determined for each trial. For each dependent variable, a one-way analysis of variance (ANOVA) with repeated measures was performed to test if significant difference existed among different three conditions (p<.05). The result showed that rotational angular velocity of the first metacarpal were increased in DESK posture compared with STAND posture during SU phase. The average nEMG values of FDI(First dorsal interosseous) were less in SIT and DESK posture compared with STAND posture during SR phase. These indicated that smartphone postures may effect the thumb ROM(Range of motion) and muscle activity. This has led to suggestions of the need for further kinetic and EMG analyses to evaluate best assess and characterize with smartphone use.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.29-39
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• 2021

Cognitive behavioral therapy (CBT) is effective for people with an addiction tendency. This study aims to implement a CBT program for college students at high risk of smartphone addiction and investigate the impact of the program on their desire to use a smartphone, depression, impulsivity, and anxiety. Baseline/post-intervention evaluation and the ABA' single-case experimental design were used. The study consisted of the baseline phase (A), pre-evaluation, intervention phase (B), post-evaluation, and baseline phase (A'). Six participants were enrolled, and the main outcome variables were daily changes in the desire to use a smartphone and changes in depression, impulsivity, and anxiety after the program. Prior to the intervention, all six participants had mild to moderate depression, but after the intervention, three were normal, two had mild depression, and only one had moderate depression. Impulsivity and anxiety scores decreased after the intervention, with anxiety scores showing the most dramatic change. The percentage of non-overlapping data for the baseline phase (A)-intervention phase (B) was more than 75% and that for baseline phase (A)-baseline phase (A') was 100% for all 6 participants. This study presented a good protocol for people with low access to psychological therapy. We expect the findings will be highly useful for people suffering from psychological difficulties due to smartphone addiction.

• 한국산학기술학회논문지
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• 제19권3호
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• pp.219-228
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• 2018

이 연구는 정보화 사회에서 스마트폰과 같은 정보통신기술의 이용이 노인의 삶의 질에 미치는 영향에 주목하여 노인의 스마트폰 이용이 배우자, 자녀 및 사회적 친분관계 등의 만족도에 미치는 영향에 대하여 고찰하였다. 서울시 지역의 60세 이상 노인을 대상으로 한 설문조사를 통하여 수집된 674명의 자료를 분석하여, 성별, 연령, 배우자유무, 교육, 취업, 소득 및 건강을 통제한 상태에서 중다회귀분석을 통하여 검증하였다. 분석 결과 첫째, 노인의 스마트폰 이용은 배우자관계 만족도에 유의미한 영향을 미치지 않았다. 둘째, 노인의 스마트폰 이용은 자녀관계 만족도에 긍정적인 영향을 미치는 것으로 나타났다. 셋째, 노인의 스마트폰 이용은 사회적 친분관계 만족도에 긍정적인 영향을 미치는 것으로 나타났다. 이 연구결과는 노년기 스마트폰의 이용이 노인의 대인관계 만족도에 미치는 효과는 대인관계 유형에 따라 차등적으로 나타나며, 배우자관계 보다는 자녀나 사회적 친분관계 개선에 긍정적인 역할을 한다는 것을 의미한다. 이 연구는 노년기 가족관계 및 사회적 친분관계 등 대인관계의 증진을 위하여 스마트폰과 같은 정보통신기술 이용의 확대와 노인의 정보화 수준의 향상을 위한 실천적 노력의 필요성을 시사한다.

• 감성과학
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• 제20권4호
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• pp.135-142
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• 2017

In the present study, we investigated the physiological effects of smartphone use at night when the display luminance and white balance were differently manipulated. Two levels of luminance and two types of white balance were combined to form four types of displays. Subjects were instructed to use smartphones between 23:00 to 01:00 twice a week for two weeks, and for each trial, subjects were given one of the four display types. Melatonin concentration in the saliva, body temperature and heart rate were measured before and after each experiment. The experimental result showed that the low luminance display supported melatonin secretion and thermoregulation compared to the high luminance display. With regard to the white balance, higher melatonin level was observed when using the display that filtered blue light. The low luminance display together with yellowish tint best supported restful sleep at night in terms of every physiological response. This study collectively demonstrates that bright and blue light emitted from smartphone displays adversely affect melatonin secretion, body temperature, and heart rate, and therefore, suggests the use of a display with low luminance or a display that filters blue light for a restful sleep at night.

• 한국융합학회논문지
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• 제8권8호
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• pp.177-183
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• 2017

본 연구는 남자 중학생을 대상으로 스마트폰 과의존에 미치는 영향요인을 규명하기 위해 수행한 서술적 연구이다. 남자 중학생 174명을 대상으로 스마트폰 과의존, 스트레스, 자아탄력성, 스마트폰의 기능별 사용 등에 대한 설문조사 하였다. 연구결과 남자 중학생의 스마트폰 과의존 위험군은 29.9%(잠재적 위험군은 23.6%, 고위험군은 6.3%)이었으며, 스마트폰 과의존의 영향요인은 스마트폰 사용시간, 스트레스, 자아탄력성, 고학년이었다. 즉, 하루 평균 휴대폰 사용시간이 길수록, 스트레스 수준이 높을수록, 자아탄력성 수준이 낮을수록, 고학년일수록 스마트폰 과의존도가 높았다. 이에 따라 과도한 스트레스 상황을 극복할 수 있는 적절한 스트레스 대처양식의 개입이 요구된다. 또한 자아탄력성 수준을 높이는 개입 프로그램의 개발과 수행을 통해 스트레스 대처에 대한 적절한 개입효과 뿐만 아니라 스마트폰 사용시간도 통제할 수 있는 효과도 기대할 수 있을 것으로 사료된다.

• 대한안전경영과학회지
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• 제15권4호
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• pp.323-330
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• 2013

The number of domestic smartphone users exceeded 30 million people, and the time in the future everyone will use a smartphone that will come with ago. Past purchase decisions, related research and product from the competition between the past case and the relevant literature for the smartphone market smartphone type to derive a purchase decision factors in the decision to purchase any difference between the factors. Literature and practices through performance, switching costs, product loyalty, design, brand, after-sales service, the price more than 7 variables were analyzed. One hundred people surveyed, respectively, did not obtain the response of a variety of ages and occupations, age of the sample used in the analysis of this study, and is concentrated as a student at the university of smartphones used to facilitate users analysis was done. We expect smartphone companies and related companies to be able to give guidelines for effective technology management.

• Journal of Information Technology Applications and Management
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• 제19권2호
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• pp.17-38
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• 2012

The purpose of this study is to investigate the research model attempting to explain factors influencing consumers' attitude towards Smartphone adoption and behavioral intention to use a Smartphone. The 357 sets of data are tested against the model using SEM (structural equation model). The research results reveal that organizational and social influences, consumers' self-actualization, and trust affect consumers' attitude towards Smartphone adoption, and behavioral control influences behavioral intention. Implications of the findings suggest that Smartphone should be approached with a holistic view, suggesting that Smartphone research should emphasize Smartphone as a convergent device including both hardware and software with services and applications. Research results are discussed, and limitations of the current study and future research are presented.

• 한국IT서비스학회지
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• 제10권2호
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• pp.41-60
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• 2011

Due to the explosive growth of smartphone use, new type and format of business opportunity is being created. Despite the creation of added value using smartphone is very important, the past study on smart phone has been mainly focused on its functions and specifications. This study is intended to identify the factors that influence continuance usage intention of smartphone and to analyze the relationship between such factors and the expected confirmation. satisfaction, and usage intention. The result of this empirical study indicates that the perceived enjoyfulness and quality significantly affect users' expected confirmation and satisfaction, and social influence also affects users' continuance usage intention. Thus, it implies users place a high value on enjoyfulness and quality in using smartphone application and on social influence in choosing specific application. Finally this paper provides a detailed account of how customers accept smartphone application and their perceived characteristics affect the usage intention.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권6호
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• pp.2087-2103
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• 2014

What is an ideal authentication method for smartphone banking services? And what are the critical elements to be considered when designing it? To provide valuable insight for these questions, this study investigates various authentication requirements to be considered in smartphone banking service with the aspect of security, convenience and cost. By applying Analytic Network Process (ANP), this study first analyzes priorities among the requirements and then draws an ideal authentication method for smartphone banking service. Moreover, a sensitivity analysis has been conducted by varying the relative importance of several requirements. The results from the judgment of 72 experts revealed that, although Korean government has obliged the use of Public Key certificate, OPT and biometric alternatives may prove to be more appropriate for the smartphone banking service. These results will contribute to the provision of more secured and convenient smartphone banking services.

• 한국학교보건학회지
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• 제31권3호
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• pp.135-145
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• 2018

Purpose: The study aimed to investigate the factors associated with long hours of smartphone usage and to identify the characteristics of the high-risk group among female middle school students in South Korea. Methods: The study analyzed the data of 13,648 female middle school students using their own smartphone extracted from the 13th Youth Health Behavior Online Survey (2017). The factors related to using smartphones for a long time was analyzed by binomial logistic regression. The characteristics of the high-risk group was defined by a decision tree analysis. Results: The average hours spent on smartphone usage was 269.54 minutes per day. The significant factors associated with the long hours of smartphone usage were grade, living with parents, perceived household economic status, perceived academic achievement, stress, sadness and hopelessness, the main purpose of smartphone usage, drinking, body mass index, breakfast, and satisfaction with sleep quality. The subjects showing low academic performance and having breakfast four times a week or less were more likely to use their smartphone for a long time. Conclusion: Based on the results of the research, we need to establish intervention strategies focusing on the factors influencing long-time usage of smartphone. Particularly, the subjects who show poor academic performance and skip breakfast frequently should be considered as the high-risk group for spending long hours on smartphone usage.