Quantum Transport in Magnetic Topological Insulator Thin Films

The experimental observation of the long-sought quantum anomalous Hall effect was recently reported in magnetically doped topological insulator thin films [Chang et al., Science 340, 167 (2013)]. An intriguing observation is a rapid decrease from the quantized plateau in the Hall conductance, accompanied by a peak in the longitudinal conductance as a function of the gate voltage. Here, we present a quantum transport theory with an effective model for magnetic topological insulator thin films. The good agreement between theory and experiment reveals that the measured transport originates from a topologically nontrivial conduction band which, near its band edge, has concentrated Berry curvature and a local maximum in group velocity. The indispensable roles of the broken structure inversion and particle-hole symmetries are also revealed. The results are instructive for future experiments and transport studies based on first-principles calculations.Comment: 5 pages, 4 figure

User-centered Design of a Personal Finance Application: Localization for Young Millennials in Vietnam

Finance technology, or abbreviated as fintech, has emerged as an industry ever since people understood that technology can be radically utilized to provide value to the general public in the finance sector. Since then, many initiatives have been taken to improve finan-cial services to users, via ways such as budgeting, investing or cryptocurrency. Although the fintech industry has come a long way, it still has a particular problem when it comes to younger user segment, typically under 25 years old, known as millennials. The reason may come from the stigma that youngsters have against banking and finance being complex. This bachelor’s thesis studies how improved user experience of a fintech mobile application named Blinky, can increase its appeal to this demographic. It does so in mainly two ways, namely user-centered design and product localization. With the user-centered design approach, the thesis explores the definition of user experience, the making of good usability in an application and the principles of user-centered design. When turning to locali-zation, the thesis explains localization and culture. This lay the foundation for applying cross-cultural design to the research process. The research approach can be described as iterative cycles of weekly interviews and us-er tests. Some number of suitable participants each week provide quantitative and qualita-tive feedback for improvements by the end of the cycle. After the research is conducted, there are insightful findings deducted from the data. Several differences are shown in the way Vietnamese testers behave, in contrast to the home market, Finland. They can be in-terpreted from the culture theories. Aside from that, the quantitative data from the user tests give a direction to improve the current version of Blinky. The goal is to help millennials in Vietnam find an effective application to assist them in their personal finance. They could better manage the flow of money between friends that occurred during social activities. Furthermore, with Blinky, they could keep an intuitive log of their saving goals to help them achieve these targets

User-centered Design of a Personal Finance Application: Localization for Young Millennials in Vietnam

Finance technology, or abbreviated as fintech, has emerged as an industry ever since people understood that technology can be radically utilized to provide value to the general public in the finance sector. Since then, many initiatives have been taken to improve finan-cial services to users, via ways such as budgeting, investing or cryptocurrency. Although the fintech industry has come a long way, it still has a particular problem when it comes to younger user segment, typically under 25 years old, known as millennials. The reason may come from the stigma that youngsters have against banking and finance being complex. This bachelor’s thesis studies how improved user experience of a fintech mobile application named Blinky, can increase its appeal to this demographic. It does so in mainly two ways, namely user-centered design and product localization. With the user-centered design approach, the thesis explores the definition of user experience, the making of good usability in an application and the principles of user-centered design. When turning to locali-zation, the thesis explains localization and culture. This lay the foundation for applying cross-cultural design to the research process. The research approach can be described as iterative cycles of weekly interviews and us-er tests. Some number of suitable participants each week provide quantitative and qualita-tive feedback for improvements by the end of the cycle. After the research is conducted, there are insightful findings deducted from the data. Several differences are shown in the way Vietnamese testers behave, in contrast to the home market, Finland. They can be in-terpreted from the culture theories. Aside from that, the quantitative data from the user tests give a direction to improve the current version of Blinky. The goal is to help millennials in Vietnam find an effective application to assist them in their personal finance. They could better manage the flow of money between friends that occurred during social activities. Furthermore, with Blinky, they could keep an intuitive log of their saving goals to help them achieve these targets

User-centered Design of a Personal Finance Application: Localization for Young Millennials in Vietnam

Finance technology, or abbreviated as fintech, has emerged as an industry ever since people understood that technology can be radically utilized to provide value to the general public in the finance sector. Since then, many initiatives have been taken to improve finan-cial services to users, via ways such as budgeting, investing or cryptocurrency. Although the fintech industry has come a long way, it still has a particular problem when it comes to younger user segment, typically under 25 years old, known as millennials. The reason may come from the stigma that youngsters have against banking and finance being complex. This bachelor’s thesis studies how improved user experience of a fintech mobile application named Blinky, can increase its appeal to this demographic. It does so in mainly two ways, namely user-centered design and product localization. With the user-centered design approach, the thesis explores the definition of user experience, the making of good usability in an application and the principles of user-centered design. When turning to locali-zation, the thesis explains localization and culture. This lay the foundation for applying cross-cultural design to the research process. The research approach can be described as iterative cycles of weekly interviews and us-er tests. Some number of suitable participants each week provide quantitative and qualita-tive feedback for improvements by the end of the cycle. After the research is conducted, there are insightful findings deducted from the data. Several differences are shown in the way Vietnamese testers behave, in contrast to the home market, Finland. They can be in-terpreted from the culture theories. Aside from that, the quantitative data from the user tests give a direction to improve the current version of Blinky. The goal is to help millennials in Vietnam find an effective application to assist them in their personal finance. They could better manage the flow of money between friends that occurred during social activities. Furthermore, with Blinky, they could keep an intuitive log of their saving goals to help them achieve these targets