Search results for: Hwa Jong Kim

Items from 1 to 12 out of 12 results

chapter

A comparative study of video recommender systems in big data era

Seong-Eun Hong, Hwa-Jong Kim

2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN) > 125 - 127

2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN)

Recently, due to the wide spread of high-bandwidth access to the Internet, and abundant generation of various kinds video contents, we live in a big data era, especially in video contents. There are too much videos already, but we are even unable to know which video is good for me now. In the coming big data era, video contents providers should develop efficient recommendation system to be competitive...

chapter

Detour Path Optimization Algorithm Based on Traffic Duration Time in MPLS Network

Ilhyung Jung, Hwa Jong Kim, Jun Kyun Choi

Lecture Notes in Computer Science > Networking and Mobile Computing > Session 8: Algorithms I > 414-422

For QoS control, traffic engineering (TE) of large IP backbone networks becomes a critical issue. However, provisioning network resource efficiently through TE is very difficult for ISPs because the traffic volume usually fluctuates widely over time. The congestion especially from short-lived traffic is difficult to handle due to its bursty arrival process. In the paper, we propose a detour routing...

article

User feedback oriented quality of experience management framework

Zhang Jie, Hwa-Jong Kim

China Communications > 2013 > 10 > 1 > 72 - 80

Recently, Quality of Experience (QoE) has been introduced as a subjective measure of a user's experience of communication services. QoE was expected to take the place of traditional Quality of Service (QoS) measure in that QoE may express a direct and accurate user experience. In this paper, we propose a QoE management scheme which is based on a user's simple feedback. We explain the proposed QoE...

article

Performance analysis of authentication and key distribution scheme for mobile multi-hop relay in IEEE 802.16j

Yong Lee, Goo Yeon Lee, Hwa Jong Kim, Choong Kyo Jeong

Personal and Ubiquitous Computing > 2012 > 16 > 6 > 697-706

Mobile multi-hop relay (MMR) network is known to be easy to install and convenient to manage because of its self-organizing and self-healing characteristics. However, MMR is vulnerable to security problems because of the same reason. In this paper, we propose a new hybrid authentication and key distribution algorithm for IEEE 802.16j MMR service. The proposed scheme uses centralized authentication...

article

Take-home Message

Jae Pil Han, Su Jin Hong, Jong Ho Moon, Gun Hwa Lee, more

Gastrointestinal Endoscopy > 2011 > 74 > 6 > 1230-1237

EUS is useful for diagnosis of GI disease. However, artifacts caused by gastric mucus may worsen visibility during EUS. To investigate the efficacy of premedication with pronase, the proteolytic enzyme, for improving imaging during EUS. Blinded, randomized, prospective study. Tertiary-care referral center. This study involved 183 patients scheduled for EUS. Patients were assigned to...

chapter

Design of smart LED lighting switch with learning user's light controlling pattern

Jie Zhang, Hwa Jong Kim

ICTC 2011 > 656 - 657

2011 International Conference on ICT Convergence (ICTC)

Proposes on autonomic lighting system usually considers several environmental situations like human's existence, human motion detection and indoor illumination by sunshine on windows or other indoor luminaries, it is presented by networked human sensing, illumination detecting devices and central controlling servers. However, the systems are not yet populated because of several problems, like difficulty...

article

ENDOSCOPIC REMOVAL OF AN ENTEROLITH CAUSING AFFERENT LOOP SYNDROME USING ELECTROHYDRAULIC LITHOTRIPSY

Hwa Jong Kim, Jong Ho Moon, Hyun Jong Choi, Hyun Cheol Koo, more

Digestive Endoscopy > 22 > 3 > 220 - 222

Electrohydraulic lithotripsy is a very useful method for fragmenting biliary stones and it can be used for endoscopic removal of difficult biliary stones. Acute afferent loop syndrome induced by enterolith is very rare, and surgical treatment is the usual choice for this condition. We describe a patient with acute afferent loop syndrome, which was induced by an enterolith after a Billroth II gastrectomy...

chapter

In-service Feedback QoE Framework

Hwa-Jong Kim, Kyoung-Hyoun Lee, Jie Zhang

2010 Third International Conference on Communication Theory, Reliability, and Quality of Service > 135 - 138

2010 Third International Conference on Communication Theory, Reliability, and Quality of Service (CTRQ)

Recently, it has become essential for network service providers to know the reason of service dissatisfaction in order to improve service quality. For this purpose, the Quality of Experience (QoE) was introduced. Conventional methods of measuring QoE were usually based on network parameters and trained testers. However, this is unrepresentative of the true end user experience. For the QoE value to...

chapter

Design and Performance Evaluation of a Scalable Authentication Protocol in Mobile IP

Yong Lee, Goo Yeon Lee, Hwa Jong Kim

2007 Second International Conference on Communications and Networking in China > 1069 - 1073

2007 2nd International Conference on Communications and Networking in China

Recently, along with the proliferatin of mobile devices connected through Internet, a secure and practical mobile IP implementation became an important issue. A mobile IP can not work properly without authentication between the mobile node (MN), the home agent (HA) and the foreign agent (FA). In this paper, we propose a practical mobile IP authentication protocol with public key cryptography only...

chapter

A Context-Aware Traveler Healthcare Service (THS) System

Hwa-Jong Kim, Heui-Sug Jo

2006 Pervasive Health Conference and Workshops > 1 - 3

2006 Pervasive Health Conference and Workshops (2006 First International Conference on Pervasive Computing Technologies for Healthcare)

In the paper, we introduce a new context-aware traveler healthcare service (THS) system and compared it with ordinary emergency healthcare system. Until now, any disease or injury during a trip was regarded as an emergency and the patient is usually sent back to the closest hospital having an emergency room. With the ordinary emergency healthcare service, the traveler may suffer from high cost due...

article

Novel bent-shaped liquid crystalline compounds: IV. Dimesogenic compounds containing 2-hydroxy-1,3-dioxypropylene and azobenzene mesogens

Bong-Keun So, Hwa-Jong Kim, Soo-Min Lee, Hyun Hoon Song, more

Dyes and Pigments > 2006 > 70 > 1 > 38-42

Three bent-shaped dimesogenic liquid crystalline compounds having odd-numbered terminal alkyloxy chains (n=5, 7, 9) with a 2-hydroxy-1,3-dioxypropylene as central linking unit and two identical azobenzene mesogens were synthesized. Their mesomorphic properties were then characterized by polarized light microscopy and differential scanning calorimeter. The terminal alkoxy chain length was the key factor...

article

Virtual Cellular Network: A New Wireless Communications Architecture with Multiple Access Ports

Hwa Jong Kim, Jean-Paul Linnartz

Wireless Personal Communications > 1999 > 10 > 3 > 287-307

A “virtual cellular network” (VCN) is proposed to provide wireless random access for bursty multimedia traffic to a fixed backbone infrastructure. A VCN does not use a conventional cellular frequency reuse concept. In a VCN, each terminal sends packets using the entire system bandwidth while any nearby port can pick up the signal. Then, the ports relay the packets to the port server (PS) over a fixed...

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INFONA - science communication portal

Search results for: Hwa Jong Kim

A comparative study of video recommender systems in big data era

Detour Path Optimization Algorithm Based on Traffic Duration Time in MPLS Network

User feedback oriented quality of experience management framework

Performance analysis of authentication and key distribution scheme for mobile multi-hop relay in IEEE 802.16j

Take-home Message

Design of smart LED lighting switch with learning user's light controlling pattern

ENDOSCOPIC REMOVAL OF AN ENTEROLITH CAUSING AFFERENT LOOP SYNDROME USING ELECTROHYDRAULIC LITHOTRIPSY

In-service Feedback QoE Framework

Design and Performance Evaluation of a Scalable Authentication Protocol in Mobile IP

A Context-Aware Traveler Healthcare Service (THS) System

Novel bent-shaped liquid crystalline compounds: IV. Dimesogenic compounds containing 2-hydroxy-1,3-dioxypropylene and azobenzene mesogens

Virtual Cellular Network: A New Wireless Communications Architecture with Multiple Access Ports

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