Drowsiness Driving Prevention System using Bone Conduction Device

( Sangwoo Hahm ),( Hyungwoo Park ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.9

With the development of IT convergence technology, autonomous driving has gradually developed; however, the vehicle is still operated by the driver, who should always be in good health - but sometimes, this is not the case. It is especially dangerous to drive when drowsy, and unable to fully concentrate on driving, such as when taking certain medicines, or through fatigue. Drowsy driving is at least eight times more dangerous than normal driving, and as dangerous as drunk driving. Previous research has looked at technology to detect drowsiness, in order to wake up drivers when necessary, or to safely stop the vehicle. Furthermore, many studies have been conducted to find out when drowsiness occurs. However, it is more desirable for the driver to take sufficient rest during a break, in order to be able to continue to focus and drive. In other words, it is important to maintain a normal state before drowsiness. In this study, we introduce a sound source to increase driver concentration and prevent drowsiness, another that can improve the quality of sleep, and a system that produces these sound sources. The proposed system has a noise reduction effect of about 15 dB. We have confirmed that the proposed sound induces an EEG of the desired form.

Which Traits of Chinese Students Reduce Social Identity During Study in Korea?

SangWoo Hahm,Xiu Jin 인문사회과학기술융합학회 2017 예술인문사회융합멀티미디어논문지 Vol.7 No.7

Social identity plays a key role for foreign students who study abroad. In this paper, we provide a more explanation of social identity, introversion, ethnocentrism, and the need for cognitive closure. Furthermore, we also present the relationship between them. This study focused on introversion, ethnocentrism, and the need for cognitive closure, which are generally seen as negative traits, and investigated their influence on social identity. Through regression analysis, the results showed that all three traits s are negatively correlated with social identity, and that ethnocentrism had the most negative effect on social identity. Accordingly, the research findings demonstrated that students who possess such traits would have less social identity with Korea. Furthermore, for such students it would be difficult to adapt to Korean society or communicate with Korean students. Thus, such phenomena may be considered as factors that could reduce life satisfaction and lead to less than perfect outcomes while studying abroad.

Convergence research on the speaker's voice perceived by listener, and suggestions for future research application

Hahm, SangWoo The Institute of Internet 2022 International journal of advanced smart convergenc Vol.11 No.1

Although research on the leader's or speaker's voice has been continuously conducted, existing research has a single point of view. Sound analysis of voice characteristics has been studied from engineering perspectives, and leadership trait theory has been studied from a business perspective. Convergence studies on leader voice and member cognition are being attempted today. Convergence research on voice has a positive effect on refinement of voice analysis, diversification of voice use, and establishment of voice utilization strategy. This study explains the current flow of research on convergence between speaker's voice and listener's perception, and suggests a direction for the future development of voice fusion research. Furthermore, in connection with AI in the 4th industrial age, new attempts for voice research are sought. First, advances in AI focus on strategically generating the voices needed for individual situations. Second, the voice corrected in real time will support the leader and speaker to utilize the desired voice type. Third, voices through AI based on big data will affect the cognition, attitude and behavior of individual listeners who members, customers, and students in more diverse situations. The purpose and significance of this study is to suggest the way to research the leader's voice recognized by members, and to suggest a method that can be applied in various situations.

The Effect of Professor's Individualized Consideration on the Personal Growth of Chinese Students Study Abroad in Korea : The Moderating Effect of Perceived School Support

SangWoo Hahm,SiYao Sun 국제문화기술진흥원 2020 International Journal of Advanced Culture Technolo Vol.8 No.2

In general, members of an organization want their own growth and development. As these members grow or develop, they feel satisfied and fulfilled in the process. Growth or development can motivate members to become more involved in their jobs. Therefore, these concepts are very important for organizations as well as individual members. Various elements of the organization affect the growth of its members. Leaders influence members to achieve organizational goals. Leaders can therefore be an important variable influencing the growth of members. Specific leadership informally develops the potential to identify and satisfy members' personal needs and to achieve higher performance. These leader behaviors motivate members and drive their growth. Thus, this leadership will have a significant impact on the growth of members. In addition, in this relationship, if members have perceived organizational support, they can further improve their expectations for growth. Therefore, support from leaders and organizations will have a positive impact on employee growth. This study highlights the importance of the growth of members of the organization. It demonstrates the moderating effects of leader's individualized consideration and perceived organizational support necessary elements for member growth. Through this process, the purpose and significance of the study are to identify the variables that affect the personal growth of members and explain how they can grow.

Attitudes and Performance of Workers Preparing for the Fourth Industrial Revolution

( Sangwoo Hahm ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8

Recently, the most frequently studied topics related to the fourth industrial revolution (FIR) are Big data, AI, Cloud Computing and Internet of Things- these four components are collectively known as the main components of the FIR (henceforth MCs). The MCs have a wide range of effects on workers’ performance. As such it is imperative that these components are properly understood. This understanding will lead to a proper recognition of the attitudes that workers need to adopt to the MCs. Specifically, the attitudes of workers to several variables need to be examined, including importance, intention to use, belief in improvement, efficacy to use, and negative cognition. Each of these variables plays a role in determining how worker’s performance in the FIR era will change. The performance-related variables such as self-efficacy, expectations, and acceptance of change are also crucial. These variables are related to creation of new opportunities, and can greatly influence performance in the FIR era. This study explains how specific attitudes to MCs improve performance-related factors for FIR. The adoption of these attitudes will ultimately lead to more successful adaption to the FIR era.

A Study of the Roles of Leadership Styles and Attitudes with Social Responsibility for the 4th Industrial Revolution

( Sangwoo Hahm ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.2

The 4^th Industrial Revolution (FIR) has already begun. Corporations have to fulfill their social responsibilities to the FIR. This study explores the leadership and attitudes required in the FIR era for companies to fulfill their social responsibilities. In the FIR era, workers should have certain attitudes, such as self-efficacy, expectancy, and acceptance of change. If workers have these attitudes, they will be able to make a difference in the future. This study suggests the leadership styles that are needed to improve these attitudes. Participation, creativity, delegation of leadership, and inspirational motivation of leaders involves organizational change and improvement of organizational performance. This paper demonstrates the kind of leadership that is more important for each attitude through statistical analysis. Furthermore, when workers have these attitudes, not only the future, but also their current performance can be improved. To explain this relationship, the paper describes the effect of attitudes on job satisfaction. If workers have certain attitudes, their current and future performance will improve. As a result of the research, all four leadership styles had positive effects on attitudes toward FIR, and attitudes showed a mediating effect on the relationship between leadership styles and job satisfaction. In addition, it has been proven that the role of participative and delegating leadership, which is more member-oriented leadership, is more important. Leadership will enable workers to have a particular attitude through member-centered leadership, and workers will be able to increase current and future performance. Through these efforts, companies will be able to increase their performance in the current and FIR era, and fulfill their social responsibilities more faithfully. Therefore, in the FIR era, companies will play an important role in the development of society, and create new values.

An Interdisciplinary Study of A Leaders’ Voice Characteristics: Acoustical Analysis and Members’ Cognition

( Sangwoo Hahm ),( Hyungwoo Park ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.12

The traditional roles of leaders are to influence members and motivate them to achieve shared goals in organizations. However, leaders such as top managers and chief executive officers, in practice, do not always directly meet or influence other company members. In fact, they tend to have the greatest impact on their members through formal speeches, company procedures, and the like. As such, official speech is directly related to the motivation of company employees. In an official speech, not only the contents of the speech, but also the voice characteristics of the speaker have an important influence on listeners, as the different vocal characteristics of a person can have different effects on the listener. Therefore, according to the voice characteristics of a leader, the cognition of the members may change, and, the degree to which the members are influenced and motivated will be different. This study identifies how members may perceive a speech differently according to the different voice characteristics of leaders in formal speeches. Further, different perceptions about voices will influence members’ cognition of the leader, for example, in how trustworthy they appear. The study analyzed recorded speeches of leaders, and extracted features of their speaking style through digital speech signal analysis. Then, parameters were extracted and analyzed by the time domain, frequency domain, and spectrogram domain methods. We also analyzed the parameters for use in Natural Language Processing. We investigated which leader’s voice characteristics had more influence on members or were more effective on them. A person's voice characteristics can be changed. Therefore, leaders who seek to influence members in formal speeches should have effective voice characteristics to motivate followers.

The Role of Professors' Intellectual Stimulation for Intellectual Growth among Chinese Students Who Study in Korea: The Moderating Effect of Growth Need Strength

Hahm, Sangwoo,Chen, Linlin The International Promotion Agency of Culture Tech 2020 International Journal of Advanced Culture Technolo Vol.8 No.3

Professor's role is one of various ways to improve students' academic achievement. Professors can be role models for students, motivate them to achieve higher performance, and have various influences on them. Therefore, depending on professor's role, students' attitudes and behaviors may be different, and their academic achievements may also be different. In this regard, this research focused on the intellectual growth that can be regarded as Chinese students' academic achievement. Thus, the importance of professor's intellectual stimulation behavior was emphasized and it was clarified as a way to improve the intellectual growth. Furthermore, students with a higher level of growth need strength, they are more likely to have higher intellectual growth because they put a premium on their self-growth. In order to increase the influence of professor's intellectual stimulation, we focused on the student's growth need strength. Thus, this research examined the moderating effect of growth need strength between intellectual stimulation and intellectual growth. The results showed that intellectual stimulation improved intellectual growth. In addition, growth need strength positively moderated the relationship between intellectual stimulation and intellectual growth. Therefore, it suggested the implications that professors should behave appropriate behavior according to students' personal characteristics.

Information Sharing and Creativity in a Virtual Team: Roles of Authentic Leadership, Sharing Team Climate and Psychological Empowerment

( Sangwoo Hahm ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.8

Creativity is crucial in an ever-changing e-business environment. The creation of new value is essential for companies to gain the competitive edge and to pioneer new markets in e-business. Hence, many companies in e-business operate virtual teams as they are suitable to generate creativity. Even so, virtual teams possess the inherent weakness of a lack of cohesiveness. Hence, for a virtual team to be creative, team members should help each other and share information. This study emphasizes the importance of information sharing that is supposed to improve creativity and explains how to increase them for virtual teams. To explain these relationships, three dimensions are routinely examined in organizational behavior studies: leaders, teams, and members. As a consequence, and through empirical analysis, authentic leadership, sharing team climate, and psychological empowerment enhances information sharing and creativity through their respective roles, in addition to information sharing directly increasing creativity. To improve creativity and information sharing of virtual team members in e-business, this article has highlighted the importance of the three roles stated prior. Such factors can increase information sharing and creativity, and will help virtual teams and organizations to be more successful in e-business.

Cohesiveness of Internet Based Virtual Teams in the e-business: Roles of Various Types of Leadership

함상우 ( Sangwoo Hahm ) 한국인터넷정보학회 2018 인터넷정보학회논문지 Vol.19 No.5

A virtual team consists of various members with a range of professional skills. An IT virtual team can confer such advantages as improving creativity and solving problems in e-business. However, virtual teams are less cohesive than off-line based teams, at least partly because they do not meet face-to-face to solve problems. If the cohesion of the members in a team is weak, overall performance can decrease. Therefore, this study seeks to understand the specific types of leadership needed to increase the cohesiveness of the members in a virtual team. Leadership is the most important factor for the successful operation of a virtual team. Leaders engage members with goals, and motivate them by creating positive relationships. This study describes the idealized influence of transformational leadership in which a leader directly engages members in a goal, and the role of participative goal setting in which members set their own goals. In addition, this research demonstrates the benefits of a positive attitude of a leader towards their team members and the influence of leader-member exchanges. If the cohesion of virtual teams is improved through specific leadership, the team members will be more committed to their teams and work, and the team's performance will improve. Furthermore, the successful operation of virtual teams will provide an opportunity for companies in e-business to gain a competitive advantage in the contemporary environment, where creativity is important.