Hyun-Suk Hwang

A GIS-based Design for a Smartphone Disaster Information Service Application

Our society suffers from losses because of various and complicated disasters, so government organizations are struggling to mitigate disasters to prevent a growing number of casualties. Research on disaster risk warnings has been growing steadily, and at present there are a number of places equipped with the warning systems. However, this service is not applicable for small-scale disasters because it is mostly applied in emergency situations. Therefore, a service that consistently provides disaster information is needed This paper introduces a customized disaster information search service based on a map, and suggests disaster information notification service based on an application interface for users.

Design and implementation of wireless sensor based-monitoring system for smart factory

This research focuses on the making the smart factory of supporting utility machine for real-time environment using wireless sensor network architecture. The purpose of this research is the extending lifetime of the utility machines like motors, water-pumps and compressor machine by checking the white noise, illegal vibration and high temperature. We present the monitoring system to provide a smart solution to the factory maintenance through making and installing the tiny sensor nodes which support the self-coordinating wireless sensor network. We also present the simple application of this system for CMMS (Computerized Maintenance Management System). Last we compare this one to existing PLC based Sensor measuring system.

Location-Sensitive tour guide services using the semantic web

The tour guide services are a LBS application that provides the information based on the location of users. The recent researches of the tour guide services focus on the context-sensitive computing, but the tour guide services based on HTML contents can provide only the static information. Therefore, the goals of our research are to semantically search the information. For the purpose, we describe the ontologies of the tour guide services, and express the tour information as the RDF contents based on the ontologies. In this paper, we present the architecture of the tour information Services based on the Semantic Web technologies and describe the process of the implementation.

The semantic web approach in location based services

In recent years, there has been growing interest in Location Based Service (LBS). However, the existing LBS has some limitations in the management of dynamic location-dependent contents and interoperability between the different platforms and various domains. We have focused on how LBS applications obtain integrated, dynamic, and sensitive contents on the different domains. We approach the Semantic Web technologies to resolve these issues. In this paper, we design the architecture to combine the Semantic Web technologies with the LBS and implement the prototype to describe the Semantic LBS.

Integrating User-Generated Content and Spatial Data into Web GIS for Disaster History

Information on the damage area is critical in prompt disaster response. This information is supposed to be produced by organizations involved in disaster management. In reality, due to limited resources, comprehensive and updated data are not easily obtainable. Therefore, an alternative way to collect data is urgently needed. General public can play an important role in producing these types of data, but there are some drawbacks to resolve in this approach including validity and integration with existing spatial data. This paper presents a framework in per-forming geoprocessing to validate geographic references submitted by users and integrate them with the existing spatial database, i.e., parcel, hydrology, facility. The proposed framework will surely lead us to create a more complete spatial data of the damage that are to be utilized in a web based GIS application for effective disaster management.

Ontology-Based information search in the real world using web services

The ontology is an essential component to demonstrate the semantic Web, which is being described as the next Web generation. A semantic information search based on the ontology can provide the inferred and associated information between data. To develop an ontology application in the real world, we design the architecture of search systems based on the ontology using Web services. Our system consists of ontology modules, search procedure modules for searching, RDQL generator modules, and client modules for user interfaces. Also, we construct a hotel ontology integrated with the related terms and implement a search example with the defined ontology.

A user-oriented GIS search service using ontology in location-based services

Geographical Information Systems (GIS) technology plays an increasingly important role in Location-Based Services (LBS), which include applications such as car navigation, tour guide information, route-guide information, and tracking systems. Most GIS applications focus on showing the stored information on a map, not providing user-orientedmap services to register users preferred information. We propose an ontology-based approach to register and to search personal information on maps. We also implement a GIS search prototype considering user preferences using favorite food information and having a connection function to Web sites on the map using our digital map format. Our contribution is to provide a personalized service by connecting LBS/GIS services and ontology technology.

The design and implementation of real-time environment monitoring systems based on wireless sensor networks

This research focuses on the implementation of a real-time environment monitoring system for environment detection using wireless sensor networks. The purpose of our research is to construct the system on the real-time environment with the technology of environment monitoring systems and ubiquitous computing systems. Also, we present the monitoring system to provide a faster solution to prevent disasters through automatic machine controls in urgent situations. As the purpose of this study, we constructed simulation nodes with wireless sensor network devices and implemented a real-time monitoring system.

Development of a Risk Visualization System for Natural Disasters based on GIS

As natural disasters have recently occurred on a large scale, the damage caused by them have increased. In particular, there are houses and shopping malls close to beaches or mountains in Busan Metropolitan City where some areas are vulnerable on disasters. It is difficult to analyze detail causes of the damage using its documentations or existing information systems which are mostly developed based on the transaction. We design and develop a GIS-based visualization system to display relative risks of the damage occurred by natural disasters such as flooding, wave-storms, landslides, and windstorms. First, we construct a spatial database based on the risks by considering the association among data each natural disaster. Next, we develop an visualization system based on the risks from the analysis results each disaster. In case of flooding, the system shows the risks as to a river which is divided into some districts. In case of wave-storms, the system expresses damage areas as to the occurred typhoons. The system displays the risks according to the divided water press or rainfall in case of dangerous rock slides and soil slides. The system expresses damage areas according to the categorized damage level and the wave frequency in windstorms. This system can support mangers to realize dangerous areas in case a similar disaster occurs, so they can execute a speed response. In addition, the system can be utilized in constructing hazard maps based on the damage history records.

The Inference Search Process for Managing Control Points Using OWL and SWRL

Current searching works are common and essential in Web users. On the other hand, in the real world, the searching is the time-consuming works because of several searching to extract more exact and satisfied information. In this paper, we propose an Inference process to effectively extract control points based on the ontology. The ontology-based searching supports hierarchical and associated results as well as knowledge sharing with hierarchy concepts. Moreover, inferred searching can lessen consumed times of searching and prevent empty results with ontology and user-defined reasoning rules.