2016, Vol.11, No.5

Journal of Knowledge Information Technology and Systems 2023 KCI Impact Factor : 0.89

pISSN : 1975-7700 / eISSN : 2734-0570
https://journal.kci.go.kr/kkits

In this paper, we present the new techniques to analyze how to design a lightwave communications link. Specially, we introduce a direct detection, single mode fiber link utilizing a light emitting diode source, and either a pin photodiode or avalanche photodiode receiver, We discuss about a point to point link, even though an optical fiber communications link is usually part of a larger communications network. The optical fiber link has enormous bandwidth. Wavelength division multiplexing is one way of utilizing this bandwidth. Ideally, the purpose is to find a set of parameter values for the various subsystems in the link that will satisfy certain performance objectives. There can be a large number of parameters, each having a range of valid values. Processing power of computers is increasing at a rapid rate, and one way to take advantage of this increased power is to let the computer handle the details of searching for the optimal set of parameter values. The research for an acceptable design is based on multiple simulations, and is a trial and error search if done manually. we give a general method of the modeling approach, the key blocks and parameters of a lightwave communications link.

Revolution of device in the 21st century is the production of smart-phone. Apple produced new business model like Platform Business by using the smart-phone. This study reclassified the Platform Business types which corresponded to the mobile age. The classification of Platform types was carried out by a lot of scholars in the meantime. However, as the smart-phone was settled down as popular device for people all around the world, it required the classification in tune with the times as new business models were consistently produced and evolved. In this study, four types of Platform were classified based on the Open and Closed by the Platform form, and Shared and Subordinated by the function. Furthermore, this study classified them as open Extended Platform with the shared function, open One-Way Platform with the subordinated function, closed Matching Platform with the shared function, and closed Subordinated Platform with the subordinated function. In this way, this study is to suggest a major strategy to promote the each Platform Business Type. Extended Platform, it is important strategy to share and lower the barrier to entry. One-way Platform, it is important strategy to differentiation and open the platform. Matching Platform, it is important strategy to differentiation and specialization. Subordinated Platform, it is important strategy to raise the barrier to entry and sub ordination.

Motion based interaction systems has led to a native user interface which can reduce the learning curve of a user to adapt usage of an application. For example, a user can enlarge or reduce the size of a virtual object by scrolling with two fingers and can move an object by dragging with finger pads or arms. Although, native user interaction allows a user to intuitive and immersively interact with a virtual object, it is not easy to increase the level of the immersion to the level which users are truly “immersive”. Haptic information can be a solution for increasing the level of the immersion. This paper presents a portable haptic interaction system, which allows a user to manipulate virtual objects with his/her touch information, consisting of a tiny haptic module and a IR camera with an IMU(Inertial Measurement Unit). The tiny haptic module is developed based on crank-shaft structure in order to maximize the haptic sense in small size. An IR camera and an Inertial measurement unit are inserted into the portable haptic interaction system so that the developed haptic module can measure a user’s motion. Our system can be used for virtual reality applications and can provide the opportunities users to access a lot of informations.