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pISSN : 1975-7700 / eISSN : 2734-0570

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2015, Vol.10, No.5

  • 1.

    A Study on Weakness of a Secure Dynamic Identify based Remote User Authentication scheme for Multi-server Environment using Smart Card

    Kwang Cheul Shin | 2015, 10(5) | pp.523~536 | number of Cited : 3
    Abstract PDF
    Recently, in the multi-server environment, many studies have been conducted based upon remote user authentication scheme by dynamic identifier. For the access of legally permitted user to application server and protection of sensitive information, smart card and bio-based password authentication scheme were published. Lee-Lin-Chang's scheme found a vulnerability of Hsiang-Shih's scheme and announced an improved scheme in 2011. But Lee et al's scheme showed weakness to various attacks when the smart card was stolen or third party eavesdropped on network. Also, it is vulnerable in smart card stolen attack, malicious user attacks, server attacks (impersonation attacks) and replay attacks since the shared information of each server and registration center are the same. In this paper, I suggest the improved scheme which is secure to user and server impersonation attack, replay attack, smart card stolen attack and password guessing attack by designing to allow access to multi-server with only one registration to the registration center rather than separating registration for each server. Efficiency of security, convenience and operating cost are enhanced by only using one-way hash function.
  • 2.

    Study on the UAV Hovering using a Mouse-based Optical Flow Sensor

    Gi Weon Kim , 양진영 | 2015, 10(5) | pp.537~545 | number of Cited : 2
    Abstract PDF
    UAV are widely used in such affected areas of lifesaving, delivery and aerial photography. The most important thing in the function of unmanned aircraft equipped is to ensure stability. As the accident rate of a drone reaches 100 times that of general aircraft, the operation at the low altitude has caused the collisions with a number of structures. Therefore, studies for ensuring the safety of an unmanned aircraft, have become an important field. In this paper, the touch on measures to ensure the safety of the unmanned aircraft is covered. The most basic is implementation of reliable hovering in safety. Hovering has a method of using a GPS signal. However, hovering cannot be available when the GPS signal is lost or it has a room flight. In this paper, a possible stable hovering manner based on the optical flow is suggested. Therefore, the operation was tested, using the setting program, after an optical flow sensor is set to flight control board APM2.5. Then, the actual travel distance of the unmanned aircraft was calculated by implementing an algorithm for correcting the error in moving distance corresponding the altitude. Finally, using the calculated X and the Y coordinate value, it corrected the position of the unmanned aircraft. Position correction is adjusted by using the Roll and Pitch values. As a result, stable hovering in capable unmanned aircraft was implemented even if it was impossible to use the GSP signal under indoor flight.
  • 3.

    Time Series Expression E.coli Prediction for Gene Regulatory Network Reconstruction

    Yoon, Hee Jin | 2015, 10(5) | pp.547~553 | number of Cited : 0
    Abstract PDF
    Presenting the relationship of gene and gene is Gene Regulatory Networks(GRN). In the relationship of gene and gene, one of the target gene is affected by regulate genes. Gene regulatory network is divided into two ways by regulate gene activate expression of target gene and repress it. This paper predicted time series expression E.coli data to reconstruction Gene Regulatory Networks. E.coli used in test data is composed of eight genes and has 50 time point. To predict a one target gene, the rest is used for regulator genes. To predict E.coli data, it used Neural Network with Weighted Fuzzy Membership Function(NEWFM). E.coli Data which has time series is used Wavelet for feature extraction. Feature is used for prediction of a Gene Regulatory Networks. By the NEWFM, features were trained and selected minimum feature by Weighted Fuzzy Membership Function Bounded Sum. Data value of selected features is defuzzificated by Takagi-Sugeno value, and by using previous time expression value of regulator genes predicted current time expression value of target gene. Predicted value indicated mean square error(MSE). As comparing, it shows that predicted result is improved by each MSE result; NFRN algorithm is 0.12%, EK algorithm is 0.12%, and NEWFM is 0.003%.
  • 4.

    The Influence of Location-Based Characteristics on Advertising Value, Purchase Intention and Word-Of-Mouth

    Sunghee Jang | 2015, 10(5) | pp.555~565 | number of Cited : 1
    Abstract PDF
    The purpose of this study is to examine the factors influencing purchase intention and Word-Of-Mouth (WOM) of Location-Based Advertising (LBA) characteristics and value. The study identifies the LBA characteristics as contextual offer, credibility, entertainment, and irritation. This model tests various theoretical research hypotheses relating to LBA, advertising characteristics and value, contextual offer, and purchase intention and WOM. Appropriate measures are developed, tested, and applied to the data from 200 LBA users. The statistical analysis package used in this study was Smart Partial Least Square (PLS) 2.0. The results of hypothesis testing are as follows. First, contextual offer, credibility, and entertainment positively influence LBA value. But irritation does not influence LBA value. Therefore, this study implies that enhancing contextual offer, credibility, and entertainment are critical factors that will lead to more user LBA value. Second, LBA value positively influence purchase intention and WOM. This suggests that LBA value has a strong influence on an user purchase intention and WOM. This study will provide LBA providers with significant and strategic insights for identifying the value of LBA. In conclusion, theoretical and practical implications are discussed.
  • 5.

    RIP function on osteoclastogenesis

    Lee, Junwon | 2015, 10(5) | pp.567~574 | number of Cited : 0
    Abstract PDF
    Bone is continuously remodeled by osteoblasts and osteoclasts. Proper balance between bone matrix formation by osteoblasts and resorption by osteoclasts is essential for proper bone metabolism and these processes are tightly regulated by various hormones and cytokines in local microenvironments. Osteoclasts are multinucleated cells that form only in bone and specialize in the resorption of calcified matrix. Osteoclasts were derive from hematopoietic cells in the bone marrow and stimulated by receptor activator of nuclear factor NF-κB ligand (TRANCE, RANKL). RIP is known as a potent therapeutic agent with anti-inflammatory by activation of T cell potential. However, the regulatory effects of RIP on osteoclast differentiation are unclear. In this study, We examined the effects of RIP on osteoclast differentiation with respect to bone resorption. RIP negatively regulates TRANCE-induced osteoclast differentiation. Expression levels of RIP are significantly reduced by TRANCE during osteoclastogenesis. Overexpression of RIP in bone marrow-derived monocyte/macrophage lineage cells (BMMs) inhibits the formation of TRAP multinuclear osteoclasts. Furthermore, overexpression of RIP in BMMs attenuates the gene induction of nuclear factor of activated T cells (NFAT) c1 and osteoclast-associated receptor (OSCAR) during TRANCE-mediated osteoclastogenesis. Taken together, our results suggest that RIP can act as an important modulator of TRANCE-mediated osteoclastogenesis.
  • 6.

    A Design and Implementation of a Kayak Simulator with Motion-Haptic Feedback

    Jae-Yong Seo , 박원형 , Yun Inho and 2 other persons | 2015, 10(5) | pp.575~582 | number of Cited : 0
    Abstract PDF
    The one of the most important factors in virtual simulating systems is to convey an appropriate motion-haptic signal to users according to the virtual environment’s condition. However, most of conventional virtual simulating systems can hardly provide immersive sensation to users because they do not create motion-haptic signal. Therefore, in this paper, we design and implement a kayak simulator system which allows a user to naturally manipulate and to immersively control a virtual kayak through motion haptic feedback. In order to provide the same sensation to users as if they drive a real kayak, the implemented kayak simulator consists of three parts (a motion input part, a motion re-creating platform, and a virtual environment). The motion input part uses an inertia measurement unit (an IMU) for measuring a user’s motion which is used for control input to the kayak simulator. A virtual environment module visualized the motion of the virtual objects and an avatar onto the screen based on the measured user’s motion. To convey the motion-haptic feedback to users, the motion re-creating platform generates motion feedback information in response to the user’s interaction with virtual objects. The proposed kayak simulator is capable of dynamically expressing kayak’s motion according to the amount of user’s interaction and virtual waves. If the developed motion re-creating platform is used for constructing other virtual applications, users not only can naturally manipulate with virtual objects but also can sense realistic and immersive sensation.
  • 7.

    Freezing Analysis Based on River Flow Comparison of Digital Time-lapse Camera

    Kwon Oh-Sung | 2015, 10(5) | pp.583~592 | number of Cited : 0
    Abstract PDF
    In Korea, the one important indicator of seasonal change is the first freezing time of Han river. Until today, the observation method of river freezing phenomenon is visual inspection methods by observers. However, The method has a severe weakness which is often biased by observer's subjective. As a result, it is required the more objective and stable observation method to analyze river's freezing process. In this paper, we installed the remote observation camera on the Han river bridge for our several experiments. Our work has performed during 30 days from December 1, 2014 using the observation camera system. First of all, We examined the variation patterns of the gray-scale intensity value array. The extracted feature values was recomputed and normalized based on the photographing condition of the observation image area. And We applied several image processing techniques to extract the freezing values. consequentially, We could observe several significant features for analyzing the freezing process of Han river. We could analysis the freezing degree using by the ratio between the frozen and normal river area. In experiments, we could identify that the average gray-scale Intensity of observing area was close to 0 as time passed. We could confirm that our proposed method was a stable process for finding frozen river area.
  • 8.

    Reliability Analysis of Systems Using Interval Valued Neutrosophic Sets

    Cho, Sang Yeop | 2015, 10(5) | pp.593~601 | number of Cited : 3
    Abstract PDF
    There are many various methods to deal with the reliability of systems. Fuzzy set theory is the one of the methods in order to evaluate the reliability of systems. In the fuzzy set theory the membership degree is represented by real number, where ∈ . Sometimes the membership degree of the fuzzy sets can not be represented by real number because of the membership degree itself may has the vagueness. To resolve the this problem the interval valued fuzzy sets are introduced. In the interval valued fuzzy sets the membership degree is represented by interval, where ⊆ . In some domains we need the concept of the truth membership function to supported by the evidence and the falsity membership function against by the evidence, where , ∈ . In order to deal with these the intuitionistic fuzzy sets are proposed. The classic sets, the fuzzy sets, the interval valued fuzzy sets, and the intuitionistic sets are able to only capture the concept of the incompleteness not the indeterminacy of information. In this study we propose a new way to evaluate the reliability of systems based on the interval neutrosophic sets. The interval neutrosophic set is a part of the neutrosophic sets which are able to deal with the nature of neutralities. In the interval neutrosophic sets these are consisted of three components such as truth membership function , indeterminacy membership function , and falsity membership function . , , ⊆ . Therefore we can manipulate the indeterminacy based on the indeterminacy membership function of the interval neutrosophic sets. The proposed method may be used to analyze the reliability of systems which have the concept of the indeterminacy.
  • 9.

    Power-Aware Hybrid Encoding Scheme for Mobile Cloud Services on Open Source Hardware Platforms

    Boyun Eom , 이춘화 | 2015, 10(5) | pp.603~610 | number of Cited : 0
    Abstract PDF
    Cloud computing has been developed in various ways and many services have been migrated to this relatively new paradigm since its advent. One representative example is mobile cloud computing, MCC, in short. With introduction of faster network access and better empowered mobile devices than their predecessors, the integration of cloud computing and mobile devices would be the natural technology evolution path, which leads to the vision of mobile cloud computing. To provide the mobility capability, mobile devices have battery as an energy source and if the battery is discharged no more cloud service is available. The biggest advantage of mobile device which is mobility causes to the biggest disadvantage. Motivated by the importance of conserving energy on mobile devices, in this paper, we introduce an adaptive energy-aware encoding scheme for open source hardware platforms for RDA-based mobile cloud services which we have named in our work. We expect that an open source hardware platform can be a next important mobile device as well as a leader of IoT (Internet of Things). Through experiments we have found that the characteristic of hardware components on a device need to be considered carefully and the result showes that our proposed method is effective in saving energy consumption for providing RDA-based mobile cloud computing.
  • 10.

    An Efficient Data Exchange Protocol for Peer-to-Peer Live Video Streaming based the Web

    JInsul Kim , 박상현 , 이동건 | 2015, 10(5) | pp.611~617 | number of Cited : 0
    Abstract PDF
    Currently, service providers are facing with problem is slash dot effect or flash crowds when many users increase significantly and at the same time access into one live event. Now to address these issues, the combined benefits of P2P CDN CDN P2P hybrid system is being used, but the server's processing ability of a hybrid P2P CDN system has reached the critical point and the majority of users are constantly want to receive better quality content. Accordingly, the service provider has to spend money to add servers continuously. Peer-to-Peer network is one of a solution to solve this problem. To decrease request data to the server, users can request data from other users in the same network to get the desired content. In this paper, we propose the efficient data exchange protocol for P2P live video streaming over the Web in order to decrease the number of requests to servers that means reduce the cost of transmission. Also by set up short timeout for request to server and split video into small chunk, our system has smaller end-to-end delay than unconnected mesh system in CDN-P2P-hybrid. In our setup environment, we compared the experiment the number of requests for change in delay between the server and the termination of the proposed method and the conventional method.