Seungae Kang

Apoptosis of the reduced enamel epithelium and its implications for bone resorption during tooth eruption.

Bone remodeling, the selective deposition and resorption of bone, is an important cause of tooth eruption. During tooth eruption, reduced enamel epithelia of the enamel organ interact with follicle cells to recruit osteoclasts for bone remodeling. However, little is known about the relationship between cellular activity of reduced enamel epithelium and bone resorption during tooth eruption. The purpose of this study was to investigate the effect of apoptosis in reduced enamel epithelium on osteoclastogenesis and its implications for bone resorption. We have analyzed erupting mandibular molars in mice by TdT-mediated dUTP-biotin nick end labeling assay, tartrate-resistant acid phosphatase (TRAP) staining, and immunohistochemistry. TRAP-positive cells were detected in the osteoclasts near both the buccal and lingual sides of tooth socket at postnatal day 0 (PN0). They significantly increased until PN3 and decreased thereafter as the tooth erupted. Interestingly, apoptosis was barely detected in the reduced enamel epithelium at PN3 but clearly at PN7. A few apoptotic cells were also investigated within the dental follicle surrounding developing tooth at PN7 and PN10. We observed apoptotic osteoblast-lineage cells along the inner margin of alveolar bone facing the buccal cusp and at the base of the bony crypt at PN3 decreasing until PN10. In contrast, expression levels of bone sialoprotein increased at PN10 compared to levels at PN3. These results suggest that apoptosis of reduced enamel epithelium resulted in a reduction of osteoclast activity and of bone resorption mediated by dental follicle during tooth eruption.

Restricted Path Flooding Scheme in Distributed P2P Overlay Networks

In P2P overlay network, peers are able to directly share and exchange information without the help of a server. This results in a prompt and secure sharing of network resources and data handling. However, flooding algorithm that is used in distributed P2P network generated query message excessively. Our objective in this paper is to proposes a presents a restricted path flooding algorithm that can decrease query messages occurrence to solve P2P networks problems. It includes concepts as well as systematic procedures of the proposed scheme for fast path flooding in distributed P2P overlay networks.

A healthcare information sharing scheme in distributed cloud networks

Current information & communication technology infrastructures are struggling for a wide variety of devices, services, and business and technology evolution. Cloud computing is becoming a promising platform and has developed rapidly. In contrast to traditional enterprise IT solution, it enables enterprises to procure computing resources on demand basis and delegate management of all the resources to the cloud service provider. Healthcare information networks have emerged as one of the major research area in the cloud networks. Healthcare information is communication and information systems and technology that facilitate quality patient care, progressive medical education, and innovative research. Healthcare information networks must ensure the reliability and efficiency because it transfers highly personal data. Thus, it guarantees and keeps a certain level of transfer efficiency. In the distributed cloud environments, management costs for the network and computing resources are solved fundamentally through the integrated management system. It can increase the cost savings to solve the traffic explosion problem of core network via a distributed micro datacenters (DCs). However, traditional flooding methods may cause a lot of traffic because it had to send data to all the neighbor DCs. Restricted Path Flooding algorithms have been proposed for this purpose. In large networks, there is still the disadvantage that may occur traffic. In this paper, we develope lightweight path flooding algorithm to improve existing flooding algorithm using hop count restriction. This paper also investigates the problem of partial information sharing.

Service platform and monitoring architecture for network function virtualization (NFV)

With the advent of cloud and virtualization technologies and the integration of various computer communication technologies, today’s computing environments can provide virtualized high quality services. The network traffic has also continuously increased with remarkable growth. Software defined networking/network function virtualization (SDN/NFV) enhancing the infrastructure agility, thus network operators and service providers are able to program their own network functions on vendor independent hardware substrate. However, in order for the SDN/NFV to realize a profit, it must provide a new resource sharing and monitoring procedures among the regionally distributed and virtualized computers. In this paper, we proposes a NFV monitoring architecture based practical measuring framework for network performance measurement. We also proposes a end-to-end connectivity support platform across a whole SDN/NFV networks has not been fully addressed.

A Study on Programs Applying the Internet of Things (IoT) for Prevention of Falls in the Elderly

In this study, we presented the trends of IoT (Internet of Things) used to prevent, predict and detect falls in advance and the measures that could help spur application of IoT-based fall prevention technologies. The application of technology for fall prediction and detection can be divided at large into the image data analysis method and sensor data analysis method which focuses on data from sensors detecting physical activities. The applications of sensors include acceleration sensors, air pressure sensors, vibration sensors, gyroscopes, audio sensors, etc. The IoT expected to be further expanded in conjunction with big data analysis and home care service in the period ahead. For that, simplification of easy-to-operate device interfaces, linkage with home care services, more secure information collection and management should be ensured through synchronization with various devices and more rigorous security control of collected information.

The study on the application of virtual reality in adapted physical education

With the interest in ICT technology and the efforts of technology development, future ICT technologies such as virtual reality (VR) technology are rapidly developing. Virtual reality technology enables to acquire of specific technologies in a virtual space similar to reality, and can be repeated as many times as necessary. So it is effective to apply it to the disabled as exercise contents for sports experience and rehabilitation. Effective VR sports for the disabled should be applied differently according to the type and severity of disability rather than applying the latest technology unconditionally. And If VR technology is combined with artificial intelligence (AI) in the future, new changes will be made in the field of physical education for the disabled as well as non-disabled sports, furthermore it will help to improve the sports skill of the elite athletes with disabilities.

The study of exercise and health services platform for prevention of dementia

Periodical exercise is important and essential for preventing dementia, for increasing treatment effect and for increasing quality of life. Exercise and health service platform for dementia prevention is the open platform that enables individuals to effectively manage and integrate individuals dementia-related health information that are scattered around at the hospitals, life log service companies, health check-up centers, public clinics, fitness centers and others based on the ICT to enable use of the information for the customized dementia prevention services. It is comprised of three delivery channels that are mutually connected; dementia perception improvement and education service, dementia risk factor management service, and dementia diagnosis structure service. Platform for the elderly dementia prevention and health service gathers together the information on dementia-related risk factors and on the exercise that was scattered around to enable supply of diverse services for dementia prevention.

Revised P2P Data Sharing Scheme over Distributed Cloud Networks

Distributed cloud networks can be seen as a cooperative network composed of millions of hosts spread around the world and it is also a distribut-ed shared resource. In the P2P technology, as opposed to the existing client/server concept, devices are actively connected with one another in order to share the resources and every participant is both a server and a client at the same time. In P2P distributed cloud networks, peers are able to directly share and exchange information without the help of a server. This results in a prompt and secure sharing of network resources and data handling. However, flooding algorithm that is used in distributed P2P network generated query message excessively. Our objective in this paper is to proposes a presents a restricted path flooding algorithm that can decrease query message’s occurrence to solve P2P network’s problems. It includes concepts as well as systematic procedures of the proposed scheme for fast path flooding in distributed P2P distributed cloud networks.

Virtual private network for wellness sports information

To this day, active discussions and attempts were made to develop the IT foundation in order to ensure growth and advancement of the sports related industry and to ensure individual companies marketability and enhancement. In particular, development of the system in the current high-speed network in Korea that enables effective linkage and sharing of sports related information, and the system effective management and operation are certainly important issues. In order for the developed IT infra in Korea to act as a growth driver for the sports industry, it is important to develop structured and user-friend information network to make an effort to connect these information networks in an integrated manner. Development and linkage of effective information network in the sports field are expected to become an important medium for satisfying diverse demands for the sports. This research propose a virtual private network for the development of large capacity for the sports related information based on the nation technological capability

A Study on Development of Application for Management of Obesity in Children with Intellectual Disabilities

The purpose of this study was to provide information necessary for development of the applications that could facilitate the management of obesity in children with intellectual disabilities and to present improvement measure for development of practical applications. The five contents of the application for management of obesity in children with intellectual disabilities are as follows: Promotion of intake of healthy foods, Promotion of physical activity, Early childhood diet and physical activity, Health/nutrition and physical activity for school-age children, and Weight management. In addition, this study presented the user expansion and their continuous involvement through interface simplification, alert function, reward, voice recognition and subtitle support strategies in consideration of the characteristics of the children with intellectual disabilities.