• The Journal of the Korea Contents Association
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• v.14 no.10
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• pp.438-453
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• 2014

This paper proposes a system to translate an RDB into an OWL ontology which enables the users to navigate the ontology in GUI. In order to accomplish the goals mentioned previously, the system overcame two difficulties. First, our system defines a new mapping algorithm to map between DB elements and ontology ones. Comparing with existing solutions, our algorithm is able to generate ontologies from more DB structures. Second, our system provides the same data generated by a reasoner to the users. Note that this operation does not load ABox ontology on a reasoner. In addition, Tableau-based reasoners have the tractability problem on a large ABox (e.g., large ABoxes translated from DBs practically cannot be served). To solve this, our system internally runs SQL queries to retrieve the same data as the one from a reasoner every time ABox elements are queried.

• Journal of Korea Society of Industrial Information Systems
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• v.17 no.1
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• pp.21-29
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• 2012

In this paper, we propose a new method to select colors representing the meaning of text contents based on the cognitive relation between words and colors, Our method is designed on the previous study revealing the existence of crucial words to estimate the colors associated with the meaning of text contents, Using the associative probability of each color with a given word and the strength of color association of the word, we estimate the probability of colors associated with a given text. The goal of this study is to propose a system to recommend the cognitively plausible colors for the meaning of the input text. To build a versatile and efficient database used by our system, two psychological experiments were conducted by using news site articles. In experiment 1, we collected 498 words which were chosen by the participants as having the strong association with color. Subsequently, we investigated which color was associated with each word in experiment 2. In addition to those data, we employed the estimated values of the strength of color association and the colors associated with the words included in a very large corpus of newspapers (approximately 130,000 words) based on the similarity between the words obtained by Latent Semantic Analysis (LSA). Therefore our method allows us to select colors for a large variety of words or sentences. Finally, we verified that our system cognitively succeeded in proposing the colors associated with the meaning of the input text, comparing the correct colors answered by participants with the estimated colors by our method. Our system is expected to be of use in various types of situations such as the data visualization, the information retrieval, the art or web pages design, and so on.

• The Journal of Society for e-Business Studies
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• v.14 no.4
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• pp.75-94
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• 2009

Since XML emerged as a standard for data exchange on the web, it has been established as a core component in e-Commerce and efficient query processing over XML data in ubiquitous computing environment has been also receiving much attention. Recently, the techniques were proposed whereby an XML document is fragmented into XML fragments to be streamed and the mobile clients receive the stream while processing queries over it. In processing queries over an XML fragment stream, the average access time significantly depends on the order of fragments in the stream. As such, for query performance, an efficient organization of XML fragment stream is required as well as the indexing for energy-efficient query processing due to the reduction of tuning time. In this paper, a technique of XML fragment stream organization based on query frequencies, fragment size, fragment access frequencies, and an active XML-based indexing scheme are proposed. Through implementation and performance experiments, our techniques were shown to be efficient compared with the conventional XML fragment stream organizations.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.1
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• pp.123-128
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• 2017

In this paper, we have proposed and implemented a smart sensor network system based on the Arduino open source hardware. The proposed smart sensor network system is composed of kinds of sensors and open-source hardware based, Arduino, etc. that can handle the measured sensor values. Also the communication modules that can be used to transmit the measured sensor values from the sensor control unit are configured. In the control unit the sensor data such as temperature, humidity, light intensity can be transmit to the main program and the main program will save the data in the DB or transmitting the value of the particular control signal to the control device or the actuator. The user can also check the information in the system using the measured values from the smart sensor networks through the web, or to remotely control a variety of actuators. And it is possible to manage a smart autonomous control over whether and how the proposed system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.3
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• pp.137-143
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• 2017

This paper presents a smart parking guidance system based on IoT car-stoppers. The car-stopper embedding an IoT sensor module has the advantage of easy installation compared to conventional parking sensors buried in ground. The parking status data are transferred to the IoT gateway by the sequential point-to-point communication between the car-stoppers. The data transferred from the IoT gateway are stored in the web server, and parking spaces can be monitored remotely through the Android app in a smart device. An active/sleep cycle method using a watch dog timer is employed to reduce the power consumption of the battery powered car-stopper. The power consumption of the car-stopper is measured to be 80 and 25 mW at the active and sleep mode, respectively. A configuration of ultra-low-power IoT sensor module is proposed to minimize the power consumption in the sleep mode. The operation of the implemented system has been verified in a real-world parking lot.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.1
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• pp.71-76
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• 2018

The technology convergence of television, communication, and computing devices enables the rich social and entertaining experience through Smart TV in personal living space. The powerful smart TV computing platform allows to provide various user interaction interfaces like IR remote control, web based control, body gesture based control, etc. The presently used smart TV interaction user control methods are not efficient and user-friendly to access different type of media content and services and strongly required advanced way to control and access to the smart TV with easy user interface. This paper propose the optical wireless communication (OWC) based remote controller design for Smart TV using smart device Flashlights. In this approach, the user smart device act as a remote controller with touch based interactive smart device application and transfer the user control interface data to smart TV trough Flashlight using visible light communication method. The smart TV built-in camera follows the optical camera communication (OCC) principle to decode data and control smart TV user access functions according. This proposed method is not harmful as radio frequency (RF) radiation does it on human health and very simple to use as well user does need to any gesture moves to control the smart TV.

• Journal of the Korea Society of Computer and Information
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• v.16 no.9
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• pp.145-153
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• 2011

In this paper, we propose a CMS(Career Management System) based on the Android Platform, which is able to manage the result of MBTI, an aptitude test and English skills such as TOEIC, conversation, writing, etc. and to deal with the performance of the on-the-job practice, internship, project participation, graduation exhibition, contest exhibition, etc. during the period of attendance at school, This system is divided into the server module and the client one. First, the server module is used to build up the web site of the CMS that can serve to save the data related to each student's career. Second, the client module is to develop the application based on the Android Platform. This application can easily access the career-related information and always function as maintaining and managing the new data. If we make good use of the CMS proposed in this study, the relevant departments and bureaus in colleges and universities can activate the service capacity and also enhance the employment competitiveness by adding value to the students.

• Journal of Haehwa Medicine
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• v.19 no.2
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• pp.145-151
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• 2011

Backgrounds: Multidisciplinary approaches including surgery, chemotherapy, and radiation therapy are currently being performed to target various cancers in Western Medicine. However, some cancers still remain difficult to battle, which has long attracted many scientists for the discovery of new agents to fight cancers. Ginseng is one of the herbs used in Oriental Medicine including Korea, China and Japan. We have further investigated ginseng for its anticancer effect. Objective: This is a comprehensive review summary of anticancer effect of ginseng and ginsenoids as a possible agent for future cancer treatment. Methods: Data were retrieved from two web sites; www.pubmed.com and www.riss.kr, and authorized texts concerning anticancer effects of ginseng. From collected data, information on anticancer effect of ginseng was thoroughly sorted, restructured, then assessed. Results: Panax Ginseng C.A. Meyer belongs to Araliaceae Panax family, a perennial prairie plant with its root known as Ginseng Radix. Ginseng induces anticancer effect through cell cycle arrest, acceleration of apoptosis, anti-angiogenesis, and suppression of metastasis. Anticancer effect of ginseng may be due to single compound or multi-compound actions. Many studies report involvement of immune mechanisms of cytokines, Natural Killer (NK) cells, macrophages and some antibodies in enhancing anticancer effect of ginseng. In near future, possibility of applying these mechanisms into clinical trials is convinced. There were some important findings on saponin in ginsenoids in reviewing for this article; First, eradication of metastatic tumors were influenced by macrophage activation. Second, suppression of malignant melanoma cell metastasis to lung were induced by macrophage and NK cell activation in spleen with red ginseng acidic polysaccharide (RGAP). Third, final metabolites of M1, M4 had exerted anticancer effect of ginseng. Conclusion: Unknown anticancer mechanisms of ginseng have been studied for many years up until now. Ginseng is comprised of multiple bio-chemical compounds that create complex pharmaceutical interactions. Therefore, for its proper usage and safe prescription, studies on different types of ginseng and patients' susceptibility to ginseng according to their constitution and stages of the disease should be further pursued. More efforts are needed to understand the anticancer mechanisms of ginseng as well.

• Journal of Internet Computing and Services
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• v.15 no.1
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• pp.63-71
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• 2014

Currently many non-traditional application areas such as artificial intelligence and web databases require advanced modeling power than the existing relational data model. In those application areas, object-oriented database (OODB) is better data model since an OODB can providemodeling power as grouping similar objects into class, and organizing all classes into a hierarchy where a subclass inherits all definitions from its superclasses. The purpose of this paper is to develop an OODB concurrency control scheme dealing with multiple inheritance. The proposed scheme, called Multiple Inheritance Implicit Locking (MIIL), is based on so-called implicit locking. In the proposed scheme, we eliminate redundant locks that are necessary in the existing implicit locking scheme. Intention locks are required as the existing implicit locking scheme. In this paper, it is shown that MIIL has less locking overhead than implicit locking does. We use only OODB inheritance hierarchies, single inheritance and multiple inheritance so that no additional overhead is necessary for reducing locking overhead.

• Science of Emotion and Sensibility
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• v.13 no.4
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• pp.711-720
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• 2010

This study is aimed to compare choices on interaction problems, and to consider the reason of the choices. It was expected that the interaction problems are influenced from national culture, age, gender and so on. The first interaction problem in this study is default answer button when user operates to delete all messages on SMS in-box. Second one is action when pop-p window warning dangerousness of install showed on web browsing. The third one is type(analog/digital) and information expression of control panel on soup maker. 639 Korean data and 784 data from China, Japan and the Netherlands are analyzed through cross-tabulation and chi-square test. In the results, many Japanese choose 'No' answer at SMS delete problem, while many Dutch choose 'Yes'. The result suggests that uncertainty avoidance effect on interaction problems. On warning pop-up, Younger generation and men choose actively 'install' than older one and women. On type of control panel, Dutch subjects preferred analog type than other countries' subjects. On expression of control panel, older generation and individualistic subjects relatively preferred text style than other style.