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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Journal of Advanced Navigation Technology
Journal Basic Information
Journal DOI :
The Korea Navigation Institute
Editor in Chief :
Volume & Issues
Volume 17, Issue 6 - Dec 2013
Volume 17, Issue 5 - Oct 2013
Volume 17, Issue 4 - Aug 2013
Volume 17, Issue 3 - Jun 2013
Volume 17, Issue 2 - Apr 2013
Volume 17, Issue 1 - Feb 2013
Selecting the target year
A Study on the Cycle-slip Detection for GPS Carrier-phase based Positioning of Land Vehicle
Kim, Youn-Sil ; Song, Jun-Ssol ; Yun, Ho ; Kee, Chang-Don ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 593~599
DOI : 10.12673/jkoni.2013.17.6.593
In this paper, the GPS cycle-slip detection for carrier-phase based positioning of land vehicle is presented. For the carrier phase based positioning, cycle-slip detection is necessary to get the reliability of positioning result. There exists many cycle-slip detection algorithms, but we detect the cycle-slip by using the monitoring value which is defined as residual between the carrier phase measurement and estimated value from low-cost inertial sensor. To achieve goal of paper, low-cost cycle-slip detection system, permissible specification region of inertial sensor is derived. By using the result of permissible region, appropriate inertial sensor of cycle-slip detection can be decided, proper cost and proper specification. To verify the result of this paper, we conduct the rate table test. As a result, required cycle-slip detection performance is satisfied conservatively.
Analysis of Korea's Crustal Movement Velocity After the Great Tohoku-Oki Earthquake by Using GPS
Ha, Ji-Hyun ; Lee, Myong-Kun ; Cho, Young-Sik ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 600~608
DOI : 10.12673/jkoni.2013.17.6.600
The great Tohoku-oki earthquake which occurred on March 11, 2011, caused crustal movements in both Korea and Japan. This study attempts to analyze velocity changes of crustal movement of Korea Peninsula due to the Tohoku-oki earthquake and to compare the calculation with precious crustal movenents of Korea Peninsula. We found that the crustal movement velocity of South Korea increased 3.9 mm/yr northward and 7.5 mm/yr eastward on average as a result of the Tohoku-oki earthquake; when this figure is compared with the past crustal movement velocities of the Korea Peninsula.
Development of a Power Management System for Efficient Power usage of Intelligent Ship
Park, Ji-Sang ; Jeon, Min-Ho ; Lee, Myung-Eui ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 609~615
DOI : 10.12673/jkoni.2013.17.6.609
As with any ships, adequate power provision is crucial, especially on the ocean navigating ships far from the land. In order to resolve the effective and economic power supply system of any ship in operation, in this paper, we propose a power management system that intelligently controls the power supply in ships. Power management systems in this design consist of a power load detection system, a generator configuration system, and a power monitoring system respectively. The CT / PT sensor is used to measure amount of current and power in the power detection system, and according to the collected information from various sensor, the generator configuration system will switch on and off the main / sub generator effectively. Finally, the power monitoring system will display all status information of this power management system at a glance for users. This power management systems implemented in this paper is evaluated via real-time experiments, which works well as designed, and certified by KSCIEC61892-1:2012 and KSCIEC60950-1:2008.
Design of Identification and Measurements Acquisition Algorithm for Multi-Type Jammer Localization
Kang, Jae-Min ; Lim, Deok-Won ; Heo, Moon-Beom ; Nam, Gi-Wook ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 616~624
DOI : 10.12673/jkoni.2013.17.6.616
When jamming signal is received, there would be malfunctions in GPS-based precise location systems. Especially, in aviation fields, these malfunctions may lead to more serious damages. Naturally, there are some research results about the prevention or location method for one jammer, but it is hard to identify and obtain measurements when multiple and various type signals are received. Therefore, we propose a method of identification and measurements acquisition algorithm in order to localize the multiple jammers which transmit CW, DSSS and SCW type signals. Also, a computer simulation is carried out so as to validate the feasibility of the proposed method by using MATLAB. From the simulation results, it is confirmed that the proposed method successfully identified the signal type and acquired the measurements of CW, DSSS and SCW type signals.
A Development of System Design Approval Criteria for GBAS Operation in Korea
Yun, Young-Sun ; Kim, Joo-Kyoung ; Cho, Jeong-Ho ; Nam, Gi-Wook ; Heo, Moon-Beom ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 625~632
DOI : 10.12673/jkoni.2013.17.6.625
Since GBAS is a navaid facility to provide precision approach service to aircrafts landing at airports, it must be approved by the air navigation service provider or the aviation regulator to be declared operational. However, Korea has no experience in developing or operating the system so there is no approval criteria for GBAS. In order to develop the criteria in case of the future GBAS procurement, Korea Aerospace Research Institute has been testing the installed commercial GBAS station, SLS-4000, in Gimpo International Airport. This paper summarizes the criteria development results focusing on the system design approval. The criteria have been outlined based on the other leading nations' cases and documentations and established in detail on the basis of the FAA SDA artifacts. Those will be directly used for GBAS approval procedure in Korea and are expected to be useful in system requirement analysis, design, development and artifact management in case of own GNSS-based navaid system development in the future.
Implementation of a Hybrid-App of a Path Tracking System Using Geolocation and Maps on Mobile Devices
Yoo, Moon-Sung ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 633~637
DOI : 10.12673/jkoni.2013.17.6.633
Analysis of Prediction Models for DTV Field Strength in Domestic Rural Propagation Environment
Kang, Young-Heung ; Chung, Jae-Pil ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 638~645
DOI : 10.12673/jkoni.2013.17.6.638
For the efficient use of the insufficient frequency resources, a precise prediction of field strength based on various propagation environments should be set up to design of radio stations with reliable transmit power and service coverage. Therefore, many countries have tried to secure the propagation models suitable for their each geographical environments, and also, some models like BCAST were developed by Korea, but these models give the different results compared to measured values. In this paper, based on the measurements of DTV broadcasting services in domestic rural area, analysis and comparison of ITU-R P.1546 and BCAST models provide errors between measured and predicted values, and some points for improving SMI system has been proposed. As a result, P.1546 model provides the valid predicted data similar to measured data, but BCAST model has some problems of large deviation and higher prediction to measured data. In future, these problems and fading loss due to a forest or group of trees, and reflection loss due to a lake or sea need to be studied carefully.
A small Inverted-F Antenna with adjustable characteristics using lumped elements
Yoo, Jin-Ha ; Do, Sang-In ; Lee, Young-Soon ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 646~651
DOI : 10.12673/jkoni.2013.17.6.646
In this paper, a small inverted-F antenna with adjustable characteristics is proposed with use of lumped elements, capacitor and resistor. Capacitor is inserted between end of the antenna and ground for size reduction and tuning of resonant frequency. On the other hand,
resistor is replaced as the short line connected to ground. The movement of short point due to use of
resistor results in providing variation of input impedance. Therefore optimum characteristics can be obtained only by proper choice of capacitor and short point without redesign of it's geometry. In order to check the validity, the proposed antenna is designed and fabricated for 2.4 GHz frequency band, and then is applied to a product of Zigbee wireless remote controller. As a result, the size of applied antenna is
and it is observed that the measured bandwidth and antenna gain are 150 MHz and 2 dBi respectively without redesign of the antenna.
The design of digital circuit for chaotic composition map
Park, Kwang-Hyeon ; Seo, Yong-Won ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 652~657
DOI : 10.12673/jkoni.2013.17.6.652
In this paper the design methode of a separated composition state machine based on the compositive map with two chaotic maps together and the result of that is proposed. The digital circuits of chaotic composition map for the use of chaotic binary stream generator are designed in this work. The discretized truth table of chaotic composition function which is composed of two chaotic functions - the saw tooth function and skewed logistic function - is made out, and also simplefied Boolean algebras of digital circuits are obtained as a mathematical model. Consequently, the digital circuits of the map for chaotic composition function are presented in this paper.
Ring Hybrid Coupler using Microstrip Line with Via Transition
Kim, Young ; Sim, Seok-Hyun ; Yoon, Young-Chul ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 658~663
DOI : 10.12673/jkoni.2013.17.6.658
In this paper, a microstrip line implementation using via transition and its application of multilayer compact ring hybrid coupler are presented. This transition is the sandwich structure with via hole to connect two microstrip lines in different layer. For designing a compact RF/Microwave passive circuit, the microstrip line using via-hole transition is proposed to reduce a size of microwave circuit with long transmission line. For the validation of the microstrip line with via-hole transition, the multilayer ring hybrid coupler is implemented at center frequency of 2 GHz. The measured performances are in good agreement with simulation results and about 50% size reduction compare to conventional ring hybrid coupler.
Design and Implementation of Intelligent Aircraft Power Measurement System Based on Embedded
Choi, Won-Huyck ; Jie, Min-Seok ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 664~671
DOI : 10.12673/jkoni.2013.17.6.664
In this paper, in an aircraft power can be measured by wireless AEMS (aircraft electric power measurement monitoring system) system is proposed. AEMS has been design based on current commercialized power measuring systems analysis with improvement and connects it with most talked about item, smart phone and monitoring system. And also adopting real time power measuring system, constitute more practical power measuring system by controlling electricity usage in real time.
Development of Real time Aircraft harmful gas detecting Emebedded system through wireless sensor network
Choi, Won-Huyck ; Jie, Min-Seok ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 672~678
DOI : 10.12673/jkoni.2013.17.6.672
In this paper, with the development of Information technology, application service between IT and traditional industry has been on the rise. And there are many on-going discussions actively regarding the Air quality system based on wireless sensor network which monitor and control the aircraft environment automatically and manually with the application service of detecting harmful gas. In this paper, operation program constitute the administrator monitoring device, which collects data from sensor node of wireless sensor network and sensor node and transmits environment information to display and server. Also for remote monitoring, user operation program constitutes based on PC/smartphone. Under this, the harmful gas which is made in aircraft life is measured. Real time monitoring system based on wireless sensor network is designed and realized.
New Stability Conditions for Networked Control System with Time-Varying Delay Time
Han, Hyung-Seok ; Lee, Dal-Ho ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 679~686
DOI : 10.12673/jkoni.2013.17.6.679
In this paper, the new stability conditions for discrete systems with time-varying delay time are proposed by Lyapuniv theory for the stability analysis of NCS(Networked Control System) having data communication. The proposed stability conditions are very simple and easily calculated compared to the previous conditions having complex numerical calculations. The proposed results can include several previous works on the same issue. From the simulation results, the proposed conditions show the better performance and less conservative on checking stability compared with previous results.
Transmission Line using Microstrip-Slotline Transition Technology and Its Application to Power Divider
Kim, Young ; Sim, Seok-Hyun ; Yoon, Young-Chul ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 687~692
DOI : 10.12673/jkoni.2013.17.6.687
This paper presents a compact power divider using microstrip-slotline transition technology. By using the microstrip-slotline transition, the
transmission lines of the divider can be changed to two
transmission lines in the multilayer structure. In the microstrip-slotline transition, we have used via holes to make a short circuit at the microstrip line and embedded spiral configuration stubs to reduce the electrical length of an open circuit at the slotline end point. For validating the microstrip-slotline technique, we have simulated and implemented the power divider with embedded spiral and via hole configuration circuits at a frequency of 2 GHz. Good agreement between the simulation and the measurement results is obtained at the operating frequency.
Simulation Study of VHF band π/4-DQPSK Maritime Digital Communication Modem According to ITU-R M.1842-1 Annex1
Kwak, Jae-Min ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 693~699
DOI : 10.12673/jkoni.2013.17.6.693
In this paper,
-DQPSK modem according to ITU-R M.1842-1 recommendation Annex1 is investigated and simulated. At first, standardization and technical trend of VHF maritime mobile communication are introduced. The
-DQPSK modem defined in the Annex1 should support 28.8Kbps bit transmission rate within 25KHz frequency bandwidth. We describe the system model and simulation process of
-DQPSK modem transmitter and receiver design with RRC(Root Raised Cosine) transmitter and receiver filter. Then we suggest various graphical simulation results(time domain signals, constellation, power spectral density according to roll-off factor, eye diagram), and show simulated BER performance of the modem. From the simulation results, it is shown that roll-off factor of RRC filter affects to BER performance according to SNR and the designed simulation model meets the spectrum mask requirement suggested in ITU-R M.1842-1 recommendation.
Efficient Design of BCD-EXCESS 3 Code Converter Using Quantum-Dot Cellular Automata
You, Young-Won ; Jeon, Jun-Cheol ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 700~704
DOI : 10.12673/jkoni.2013.17.6.700
Quantum-dot cellular automata(QCA) is a new technology and it is an one of the alternative high performance over existing complementary metal-oxide semi-conductor(CMOS). QCA is nanoscale device and ultra-low power consumption compared with transistor-based technologies, and various circuits using QCA technology have been proposed. Binary-coded decimal(BCD), which represents decimal digits in binary, is mainly used in electronic circuits and Microprocessor, and it is comfortable in conversion operation but many data loss. In this paper, we present an BCD-EXCESS 3 Code converter which can be efficiently used for subtraction and half adjust. The proposed scheme has efficiently designed considering space and time complexities and minimization of noise, and it has been simulated and confirmed.
Disign of Non-coherent Demodulator for LR-WPAN Systems
Lee, Dong-Chan ; Jang, Soo-Hyun ; Jung, Yun-Ho ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 705~711
DOI : 10.12673/jkoni.2013.17.6.705
In this paper, we present a low-complexity non-coherent demodulation algorithm and hardware architecture for LR-WPAN systems which can support the variable data rate for various applications. The need for LR-WPAN systems that can support the variable data rate is increasing due to the emergence of various sensor applications. Since the existing symbol based double correlation (SBDC) algorithm requires the increase of complexity to support the variable data rate, we propose the sample based double correlation (SPDC) algorithm which can be implemented without the increase of complexity. The proposed non-coherent demodulator was designed by verilog HDL and implemented with FPGA prototype board.
A Study on Encryption Module for Remote Terminal Security of Smart Water-Grid Network
Park, Seung-Hwan ; Park, Hyung-Mo ; Kim, Chang-Bok ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 712~719
DOI : 10.12673/jkoni.2013.17.6.712
This paper studies the security module for the reliable transmission of the meter reading and the control data between the remote terminals and the upper server-side in smart water grid. The proposed security module was implemented to make it attachable to the remote terminal without security function. In particular, unlike the smart grid of electric field, the low power is considered due to the use of battery power in the smart water grid, and the ARIA-GCM-128 symmetric key method is adopted taking into the account that the damp and constrictive environments by the installed meter location in the underground occur a communication obstacle on building of the large-scale network system. The encryption module of this paper was devised to ensure the safety between the reading data on the terminal and the control data from the upper server, and secure the stability of the remote meter reading system by taking protection against an arbitrary alteration or modification.
The Effect of Top-electrode Perimeter on the Tunability of Tunable Varactors Based on a BZN/BST/BZN Thin Film
Lee, Young Chul ; Lee, Baek Ju ; Ko, Kyung Hyun ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 720~725
DOI : 10.12673/jkoni.2013.17.6.720
This paper has presented that fringing-electric fields enhanced by a finger-type electrode can improve the tunability of the tunable capacitor. Its top electrodes with different area and line width are designed in types of the finger for a long conducting perimeter. The tunable varactors were fabricated on a quartz substrate employing a multi-layer dielectric of a para/ferro/para-electric thin film. Compared to the conventional capacitor, finger-type capacitors are analyzed in terms of effective capacitance and tunablility. Their effective capacitance and tunability of the varactors with the long perimeter increase 24~40 % and 7~12 %, respectively, due to enhanced fringing electric fields from 1 to 2.5 GHz.
Performance Improvement of the Face Recognition Using the Properties of Wavelet Transform
Park, Kyung-Jun ; Seo, Seok-Yong ; Koh, Hyung-Hwa ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 726~735
DOI : 10.12673/jkoni.2013.17.6.726
This paper proposed face recognition methods about performance improvement of the face recognition using the properties of wavelet transform. Using discrete wavelet transform is Daubechies D4 filter that is similar to mother wavelet transform. For discrete wavelet transform method, In this case, by using LL subband only we can reduce processing time and amount of memory in recognition processing. To improve recognition ratio without further loss of 2 dimensional data changing, We applies 2D LDA. We perform SVM training algorithm to the feature vector obtained by 2D LDA. Experiment is performed using ORL database set and Yale database set by Matlab program. Test result shows that proposed method is superior to existence methods in recognition rate and performance time.
ID-based Authentication Schemes with Forward Secrecy for Smart Grid AMI Environment
Park, Dae-Il ; Yeo, Sang-Soo ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 736~748
DOI : 10.12673/jkoni.2013.17.6.736
In this paper, we analyse the vulnerabilities of KL scheme which is an ID-based authentication scheme for AMI network, and propose two kinds of authentication schemes which satisfy forward secrecy as well as security requirements introduced in the previous works. In the first scheme, we use MDMS which is the supervising system located in an electrical company for a time-synchronizing server, in order to synchronize smart grid devices in home, and we process device authentication with a new secret value generated by OTP function every session. In the second scheme, we use a secret hash-chain mechanism for authentication process, so we can use a new secret value every session. The proposed two schemes have strong points and weak points respectively and those depend on the services area and its environment, so we can select one of them efficiently considering real aspects of AMI environment.
Ground Altitude Measurement Algorithm using Laser Altimeter and Ultrasonic Rangefinder for UAV
Choi, Kyeung-Sik ; Hyun, Jung-Wook ; Jang, Jae-Won ; Ahn, Dong-Man ; Hong, Gyo-Young ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 749~756
DOI : 10.12673/jkoni.2013.17.6.749
This paper presents an algorithm concerning the ground altitude measurement using a laser altimeter and an ultrasonic rangefinder for UAV(Unmanned Aerial Vehicle). A simple ground test conducted using the laser altimeter and ultrasonic rangefinder that are used for conducting the low altitude measurement of UAV and identify the characteristics of each sensor. Especially, the disadvantages of the laser altimeter were checked through the ground test. After that who those are participated in this paper planned the algorithm which is complemented by the ultrasonic rangefinder and the experiment was conducted. The laser altimeter and the ultrasonic rangefinder were fused by a loosely coupled method by Kalman filter. The paper shows that stable value of altitude complemented by the ultrasonic rangefinder that covers the laser altimeter's drawbacks can be measured through the ground test.
The Design of Spatial-Temporal Prediction Filter for saving resources on the view navigation of a panoramic video service
Seok, Joo-Myoung ; Cho, Yong-Woo ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 757~764
DOI : 10.12673/jkoni.2013.17.6.757
A panoramic video which supports to make viewers feel an immersion through fitting to a wide field of view (FOV) larger than the human visual angle needs an interactive viewing method such as selecting targeted view point among widely viewing points of a panoramic video because it difficult to simultaneously view a whole panoramic video due to a limited viewing environment and bandwidth. When a user officially uses a view navigation in order to select a view point, it happens waste of resources such as bandwidth owing to the transmitted video data of unnecessary view points. Therefore, this paper proposes the spatial-temporal prediction filter (STPF) which is based on the direction and velocity of the view navigation for transmitting only the necessary video data. As a result of simulation, STPF reduces bitrate saving rates by from 6% to 37% compared to conventional methods in the interactive panoramic video streaming service required high bandwidth.
TSO Authorization of Airborne Multipurpose Electronic Displays
Cheon, Young-Ho ; Lee, Seoung-Pil ; Park, Jun-Hyeon ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 765~776
DOI : 10.12673/jkoni.2013.17.6.765
Civilian aircraft industry, even if the superior performance of the product in order to ensure the safety of aircraft navigation safety requirements necessary for compliance does not receive a legally recognized can not be used in aircraft characteristics. These are applied in a variety of safety in avionics for navigation of civil aircraft certification standards for the technology is implemented. KTSO-C113 aircraft for the purpose of electronic display technology to authenticate standard contains minimum performance standards. Standard design and manufacturing technology for type approval means approval by mounting the aircraft in order to use a separate approval is required. Through this paper, multi-display technology standards for aircraft type certification approval system and demonstrate compliance with the requirements for the certification practices introduced are presented.
A Study on a Multi-sensor Information Fusion Architecture for Avionics
Kang, Shin-Woo ; Lee, Seoung-Pil ; Park, Jun-Hyeon ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 777~784
DOI : 10.12673/jkoni.2013.17.6.777
Synthesis process from the data produced by different types of sensor into a single information is being studied and used in a variety of platforms in terms of multi-sensor data fusion. Heterogeneous sensors has been integrated into various aircraft and modern avionic systems manage them. As the performance of sensors in aircraft is getting higher, the integration of sensor information is required from the viewpoint of avionics gradually. Information fusion is not studied widely in the view of software that provide a pilot with fused information from data produced by the sensor in the form of symbology on a display device. The purpose of information fusion is to assist pilots to make a decision in order to perform mission by providing the correct combat situation from avionics of the aircraft and to minimize their workload consequently. In the aircraft avionics equipped with different types of sensors, the software architecture that produce a comprehensive information using the sensor data through multi-sensor data fusion process to the user is shown in this paper.
A Design and Implementation of the Integrated Framework linked Manufacturer-Specifications of the Elevators based on Android System
Kim, Woon-Yong ; Park, Seok-Gyu ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 785~791
DOI : 10.12673/jkoni.2013.17.6.785
Recently, Elevator industry is pursuing new challenges to the model of the IT convergence. The core of the convergence technologies may be the effective control and maintenance of the machine. However, because current elevator management model provides each specific model for his elevator, the management models have a variety of heterogeneous configuration so that it makes management companies to manage the elevators with many overhead. In this paper, we propose the integration framework for the various elevator models. We use proposed system based on the Android framework that is rapidly expanding technology in the embedded environment, and we propose design approach for the integration of variety of lift devices so that it provide a more efficient and stable service environment. In this way, we could integrate various device models of an elevator for the management and maintenance effectively and quickly.
Development and Performance Evaluation of an Image Detection System for Efficient 4D Images
Cho, Kyoung-Woo ; Liu, Ze-Qi ; Jeon, Min-Ho ; Oh, Chang-Heon ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 792~797
DOI : 10.12673/jkoni.2013.17.6.792
4D film is just a film that made by adding some physical effects to 3D film or general film. In order to provide physical effects to the audience, the data that make the physical effect must be added to each frames. In this paper, we proposed a video detection system that can efficiently provide physical effects by assessing the present situation such as explosion scene, snowing scene. The proposed video detection system contains an algorithm for fire detection by using R color and
value, and also an algorithm for snow detection by using RGB color model. The system constitutes in a MCU that from 8051 family. In the performance evaluations, the result shows that 91% of detection rate in case of fire and 25% of false detection rate in case of snow. Also the system is capable of providing physical effects automatically.
Development Trends of North America to Enhance the Flight Safety of Helicopter
Oh, Kyung-Ryoon ; Choi, Seok ; Park, Joong-Yong ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 798~803
DOI : 10.12673/jkoni.2013.17.6.798
In this paper, the activities of North America to enhance the flight safety of helicopter were introduced. In North America, by 2009, 49% of worldwide civil helicopters are in operation. The development trends of North America to enhance the flight safety of helicopter are expected to have a significant impact to the other helicopter operating areas. The analysis of the case of Gulf of Mexico where large fleet of Helicopter in operations, FAA's NextGen program, and the Canadian plan to comply with the ICAO's Aviation System Block Upgrades plan shows the direction of helicopter avionic development for enhancing the flight safety of helicopter.
A Design of the Ontology-based Situation Recognition System to Detect Risk Factors in a Semiconductor Manufacturing Process
Baek, Seung-Min ; Jeon, Min-Ho ; Oh, Chang-Heon ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 804~809
DOI : 10.12673/jkoni.2013.17.6.804
The current state monitoring system at a semiconductor manufacturing process is based on the manually collected sensor data, which involves limitations when it comes to complex malfunction detection and real time monitoring. This study aims to design a situation recognition algorithm to form a network over time by creating a domain ontology and to suggest a system to provide users with services by generating events upon finding risk factors in the semiconductor process. To this end, a multiple sensor node for situational inference was designed and tested. As a result of the experiment, events to which the rule of time inference was applied occurred for the contents formed over time with regard to a quantity of collected data while the events that occurred with regard to malfunction and external time factors provided log data only.
Indoor Location Tracking for First Responders using Data Network
Chun, Se-Bum ; Lim, Soon ; Lee, Min-Su ; Heo, Moon-Beom ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 810~815
DOI : 10.12673/jkoni.2013.17.6.810
In case Wi-Fi network based First responder's position tracking system is used, range measurement must be generated from RSSI finger print database. However, it is impossible to build up finger print database and to perform rescue operation at same time in the scene of rescue. In this paper, improvised Wi-Fi network without finger print database and pedestrian dead reckoning based first responders tracking system is proposed.
A Study on Cloud Computing for Detecting Cyber Attacks
Lee, Jun-Won ; Cho, Jae-Ik ; Lee, Seok-Jun ; Won, Dong-Ho ;
The Journal of Advanced Navigation Technology, volume 17, issue 6, 2013, Pages 816~822
DOI : 10.12673/jkoni.2013.17.6.816
In modern networks, data rate is getting faster and transferred data is extremely increased. At this point, the malicious codes are evolving to various types very fast, and the frequency of occurring new malicious code is very short. So, it is hard to collect/analyze data using general networks with the techniques like traditional intrusion detection or anormaly detection. In this paper, we collect and analyze the data more effectively with cloud environment than general simple networks. Also we analyze the malicious code which is similar to real network's malware, using botnet server/client includes DNS Spoofing attack.