연구성과로 돌아가기
2020 연구성과 (79 / 270)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article | Dual Circularly Polarized Planar Four-Port MIMO Antenna with Wide Axial-Ratio Bandwidth | A broadband compact-sized planar four-port multiple-input-multiple-output (MIMO) antenna with polarization diversity is presented. The proposed dual circularly polarized (CP) MIMO antenna consists of four G-shaped monopole elements, two of which are left-hand CP and the other two are right-hand CP. A vertical line strip in the G-shaped radiating element acts in balancing the vertical and horizontal electric field components to obtain 90 degrees phase difference between them for circular polarization. Also, an I-shaped strip is incorporated between the ground planes of the G-shaped antenna elements to obtain equal voltage level in the proposed MIMO configuration. The dual circular polarization mechanism of the proposed MIMO/diversity antenna is analysed from the vector current distributions. The impedance bandwidth (S-11 <= -10 dB) of the MIMO antenna is 105.9% (4-13 GHz) and the 3 dB axial ratio bandwidth (ARBW) is 67.7% (4.2-8.5 GHz), which is suitable for C-band applications. The overall size of the MIMO antenna is 70 x 68 x 1.6 mm(3), and the minimum isolation between the resonating elements is 18 dB. The envelope correlation coefficient is less than 0.25, and the peak gain within the resonating band is 6.4 dBi. | Kumar, Sachin; Lee, Gwan Hui; Kim, Dong Hwi; Choi, Hyun Chul; Kim, Kang Wook | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | ; Kumar, Sachin/W-2211-2019 | 56907994000; 57201689364; 56975581300; 57193342681; 57204432422 | gupta.sachin0708@gmail.com;gwan6088@knu.ac.kr;eastsine766@gmail.com;hcchoi@ee.knu.ac.kr;kang_kim@ee.knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 19 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 2.57 | 2025-06-25 | 36 | 49 | diversity; dual circularly polarized; isolation; MIMO; planar | MUTUAL COUPLING REDUCTION; DIVERSITY PERFORMANCE; MULTIPLE-INPUT; BAND; SYSTEM; ENHANCEMENT; PATTERN | Diversity; Dual circularly polarized; Isolation; MIMO; Planar | Antenna grounds; Bandwidth; Circular polarization; Electric fields; Electric impedance; Electric lines; Monopole antennas; Axial ratio bandwidth; Current distribution; Dual circularly polarized; Envelope correlation coefficient; Horizontal electric fields; Impedance bandwidths; Polarization diversity; Resonating elements; article; correlation coefficient; electric field; hand; impedance; polarization; Microwave antennas | English | 2020 | 2020-10 | 10.3390/s20195610 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Earthquake Detection in a Static and Dynamic Environment Using Supervised Machine Learning and a Novel Feature Extraction Method | Detecting earthquakes using smartphones or IoT devices in real-time is an arduous and challenging task, not only because it is constrained with the hard real-time issue but also due to the similarity of earthquake signals and the non-earthquake signals (i.e., noise or other activities). Moreover, the variety of human activities also makes it more difficult when a smartphone is used as an earthquake detecting sensor. To that end, in this article, we leverage a machine learning technique with earthquake features rather than traditional seismic methods. First, we split the detection task into two categories including static environment and dynamic environment. Then, we experimentally evaluate different features and propose the most appropriate machine learning model and features for the static environment to tackle the issue of noisy components and detect earthquakes in real-time with less false alarm rates. The experimental result of the proposed model shows promising results not only on the given dataset but also on the unseen data pointing to the generalization characteristics of the model. Finally, we demonstrate that the proposed model can be also used in the dynamic environment if it is trained with different dataset. | Khan, Irshad; Choi, Seonhwa; Kwon, Young-Woo | Kyungpook Natl Univ, Sch Comp Sci, Daegu 41566, South Korea; Natl Disaster Management Res Inst, Ulsan 44538, South Korea | ; Kwon, Young-Woo/HGE-6607-2022; Khan, Irshad/AAN-8522-2020 | 36166674500; 57208393811; 57208480210 | irshad.khaan@gmail.com;shchoi33@korea.kr;ywkwon@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 3 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 2.5 | 2025-06-25 | 29 | 42 | earthquake detection; time-series features; Internet of Things; machine learning | CHALLENGES; PHASE | Earthquake detection; Internet of Things; Machine learning; Time-series features | Feature extraction; Internet of things; Learning systems; Machine components; Smartphones; Supervised learning; Dynamic environments; Earthquake detection; Feature extraction methods; Machine learning models; Machine learning techniques; Static and dynamic environments; Supervised machine learning; Time series features; article; earthquake; feature extraction; human; internet of things; supervised machine learning; time series analysis; Earthquakes | English | 2020 | 2020-02 | 10.3390/s20030800 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Economical Auto Moment Limiter for Preventing Mobile Cargo Crane Overload | This study presents a computational method called economical auto moment limiter (eAML) that prevents a mobile cargo crane from being overloaded. The eAML detects and controls, in real time, crane overload without using boom stroke sensors and load cells, which are expensive items inevitable to existing AML systems, hence, being competitive in price. It replaces these stroke sensors and load cells that are used for the crane overload measurement with a set of mathematical formula and control logics that calculates the lifting load being handled under crane operation and the maximum lifting load. By calculating iterative them using only a pressure sensor attached under the derrick cylinder and the boom angle sensor, the mathematical model identifies the maximum descendible angle of the boom. The control logic presents the control method for preventing the crane overload by using the descendible angle obtained by the mathematical model. Both the mathematical model and the control logic are validated by rigorous simulation experiments using MATLAB on two case instances each of which eAML is used and not used, while changing the pressures on the derrick cylinder and the boom angle. The effectiveness and validity of the method are confirmed by comparing the outputs obtained by the controlled experiments performed by using a 7.6 ton crane on top of SCS887 and a straight-type maritime heavy-duty crane along with eAML. The effects attributed to the load and the wind speed are quantified to verify the reliability of eAML under the changes in external variables. | Noh, Soo-Hoon; Lee, Yong-Seok; Kim, Sang-Ho; Cho, Jae-Sang; Han, Chang-Soo; Lee, Seung-Yeol; Lee, Dong-Eun | Daihung Heavy Ind, Hongseon Gun 32280, South Korea; Daegu Gyeongbuk Inst Sci & Technol, Div Intelligent Robot, Daegu 42988, South Korea; Rich & Time, Seoul 08389, South Korea; Hanyang Univ, Dept Interdisciplinary Robot Engn Syst, Ansan 15588, South Korea; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, Daegue 41566, South Korea | 57219909164; 59629704900; 57200877028; 57219909634; 56298150500; 57190155889; 56605563300 | nosh416@naver.com;yslee2020@dgist.ac.kr;shkim83@dgist.ac.kr;jscho@rntime.com;cshan@hanyang.ac.kr;syl@dgist.ac.kr;dolee@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 21 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0 | 2025-06-25 | 2 | 2 | auto moment limiter; rollover prevention; cost effectiveness; mathematical model of cargo crane | DYNAMIC-RESPONSES; CONSTRUCTION; SAFETY; MOTION; SYSTEM | Auto moment limiter; Cost effectiveness; Mathematical model of cargo crane; Rollover prevention | Computation theory; Computer circuits; Cylinders (shapes); Iterative methods; MATLAB; Real time systems; Weighing; Wind; Angle sensors; Control logic; Control methods; Controlled experiment; Crane operations; Heavy duty; Mathematical formulas; Rigorous simulation; Cranes | English | 2020 | 2020-11 | 10.3390/s20216355 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effect of Graphene Doping Level near the Metal Contact Region on Electrical and Photoresponse Characteristics of Graphene Photodetector | Graphene-metal contact is crucial to fabricate high-performance graphene photodetectors since the external quantum efficiency (EQE) of the photodetector depends on the contact properties, and the influence of the contact properties is particularly dominant in short channel devices for high-speed applications. Moreover, junction properties between the channel graphene and graphene near the contact are also important to analyze the photoresponse because the built-in electric field in the junction determines the EQE of the photodetector. In this study, we investigated a relation between the photoresponse and the built-in electric field induced from the doping level difference in the junction between the channel graphene and graphene near the contact. The photoresponse could be enhanced with a high junction barrier height that is tuned by the doping level difference. In addition, we observed that the improved electrical characteristics of channel graphene do not guarantee the enhancement of the photoresponse characteristics of graphene photodetectors. | Jung, Jaedong; Park, Honghwi; Won, Heungsup; Choi, Muhan; Lee, Chang-Ju; Park, Hongsik | Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | ; Park, Honghwi/KIC-1871-2024; Lee, Chang-Ju/W-8546-2019 | 57209877588; 57206811785; 57218567994; 7402093793; 8943234400; 35366976200 | showmmee99@knu.ac.kr;hoepark@ee.knu.ac.kr;soby617@knu.ac.kr;mhchoi@ee.knu.ac.kr;chjlee@knu.ac.kr;hpark@ee.knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 17 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.29 | 2025-06-25 | 3 | 3 | graphene; graphene-metal contact; photodetector; built-in electric field; junction barrier height; doping level difference | BROAD-BAND; ULTRAHIGH | Built-in electric field; Doping level difference; Graphene; Graphene-metal contact; Junction barrier height; Photodetector | Electric fields; Photodetectors; Photons; Built-in electric fields; Contact properties; Electrical characteristic; External quantum efficiency; High-speed applications; Junction properties; Photoresponse characteristics; Short-channel devices; Graphene | English | 2020 | 2020-09 | 10.3390/s20174661 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Energy Harvested and Cooperative Enabled Efficient Routing Protocol (EHCRP) for IoT-WBAN | The health industry is one of the most auspicious domains for the application of Internet of Things (IoT) based technologies. Lots of studies have been carried out in the health industry field to minimize the use of resources and increase the efficiency. The use of IoT combined with other technologies has brought quality advancement in the health sector at minimum expense. One such technology is the use of wireless body area networks (WBANs), which will help patients incredibly in the future and will make them more productive because there will be no need for staying at home or a hospital for a long time. WBANs and IoT have an integrated future as WBANs, like any IoT application, are a collection of heterogeneous sensor-based devices. For the better amalgamation of the IoT and WBANs, several hindrances blocking their integration need to be addressed. One such problem is the efficient routing of data in limited resource sensor nodes (SNs) in WBANs. To solve this and other problems, such as transmission of duplicate sensed data, limited network lifetime, etc., energy harvested and cooperative-enabled efficient routing protocol (EHCRP) for IoT-WBANs is proposed. The proposed protocol considers multiple parameters of WBANs for efficient routing such as residual energy of SNs, number of hops towards the sink, node congestion levels, signal-to-noise ratio (SNR) and available network bandwidth. A path cost estimation function is calculated to select forwarder node using these parameters. Due to the efficient use of the path-cost estimation process, the proposed mechanism achieves efficient and effective multi-hop routing of data and improves the reliability and efficiency of data transmission over the network. After extensive simulations, the achieved results of the proposed protocol are compared with state-of-the-art techniques, i.e., E-HARP, EB-MADM, PCRP and EERP. The results show significant improvement in network lifetime, network throughout, and end-to-end delay. | Khan, Muhammad Dawood; Ullah, Zahid; Ahmad, Arshad; Hayat, Bashir; Almogren, Ahmad; Kim, Kyong Hoon; Ilyas, Muhammad; Ali, Muhammad | Ctr Excellence It, Inst Management Sci, Peshawar 25000, Pakistan; Pak Austria Fachhsch Inst Appl Sci & Technol, Dept IT & Comp Sci, Haripur 22620, Pakistan; King Saud Univ, Coll Comp & Informat Sci, Dept Comp Sci, Riyadh 11451, Saudi Arabia; Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea | Ahmad, Arshad/V-1863-2019; Ullah, Zahid/HSF-2829-2023; Kim, Honghyok/LDF-5356-2024; Almogren, Ahmad/F-1365-2014 | 57219854755; 57214672883; 57214747469; 57194435918; 8970033500; 15065463500; 59430934900; 59712333400 | ms171606894@imsciences.edu.pk;zahid.ullah@imsciences.edu.pk;yaarshad@gmail.com;bashir.hayat@imsciences.edu.pk;ahalmogren@ksu.edu.sa;kyong.kim@knu.ac.kr;ms171606966@imsciences.edu.pk;muhammad.ali@imsciences.edu.pk; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 21 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 1.74 | 2025-06-25 | 23 | 31 | cooperative effort; energy harvesting; efficient data transmission; IoT; routing protocol; WBAN | NETWORK | Cooperative effort; Efficient data transmission; Energy harvesting; IoT; Routing protocol; WBAN | Cost estimating; Data communication systems; Health; Internet protocols; Metals; Network routing; Routing protocols; Sensor nodes; Signal to noise ratio; Wireless local area networks (WLAN); Efficient routing; Extensive simulations; Heterogeneous sensors; Internet of Things (IOT); Multiple parameters; Network bandwidth; State-of-the-art techniques; Wireless body area network; Internet of things | English | 2020 | 2020-11 | 10.3390/s20216267 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Enhancements and Challenges in CoAP-A Survey | The Internet of Engineering Task (IETF) developed a lighter application protocol (Constrained Application Protocol (CoAP)) for the constrained IoT devices operating in lossy environments. Based on UDP, CoAP is a lightweight and efficient protocol compared to other IoT protocols such as HTTP, MQTT, etc. CoAP also provides reliable communication among nodes in wireless sensor networks in addition to features such as resource observation, resource discovery, congestion control, etc. These capabilities of CoAP have enabled the implementation of CoAP in various domains ranging from home automation to health management systems. The use of CoAP has highlighted its shortcomings over the time. To overcome shortcomings of CoAP, numerous enhancements have been made in basic CoAP architecture. This survey highlights the shortcomings of basic CoAP architecture and enhancements made in it throughout the time. Furthermore, existing challenges and issue in the current CoAP architecture are also discussed. Finally, some applications with CoAP implementation are mentioned in order to realize the viability of CoAP in real world use cases. | Tariq, Muhammad Ashar; Khan, Murad; Khan, Muhammad Toaha Raza; Kim, Dongkyun | Kyungpook Natl Univ, Dept Artificial Intelligence, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea | ; Khan, Turyalai/HPH-0061-2023; Khan, Muhammad Toaha Raza/KXR-8209-2024 | 57219865336; 56151971600; 57202044597; 35753648800 | tariqashar@knu.ac.kr;mkhan@knu.ac.kr;toaha@knu.ac.kr;dongkyun@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 21 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 1.82 | 2025-06-25 | 30 | 43 | CoAP; IoT; WSN; congestion control; enhancements in CoAP | INTRUSION DETECTION SYSTEMS; CONGESTION CONTROL; HEALTH-CARE; INTERNET; PROTOCOL; THINGS; DISCOVERY | CoAP; Congestion control; Enhancements in CoAP; IoT; WSN | Congestion control (communication); HTTP; Hypertext systems; Internet protocols; Network architecture; Sensor nodes; Surveys; Application protocols; Constrained Application Protocol (CoAP); Efficient protocols; Engineering tasks; Health management systems; Home automation; Reliable communication; Resource discovery; Internet of things | English | 2020 | 2020-11 | 10.3390/s20216391 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Expansion-Induced Crack Propagation in Rocks Monitored by Using Piezoelectric Transducers | The objective of this study is to develop a new vibration-free excavation method based on vermiculite expansion for rock cracking and to evaluate the performance of the heating system via elastic wave monitoring. Natural vermiculites expand rapidly in volume when heated above 800 degrees C. MgO powder is used to evenly transmit the surface temperature of a heater rod, which can attain high temperatures rapidly, to the vermiculites. The insertion direction of the heater rod greatly affects the expansion pressure. Three cuboid rock specimens are prepared and equipped with the heating system at different hole-to-face distances. Crack propagation is monitored by a pair of disk-shaped piezoelectric transducers. For short hole-to-face distances, the wave velocity and maximum amplitude rapidly decrease after certain time. For the greatest hole-to-face distance, the shear wave velocity remains constant during the test, while the maximum amplitude decreases after a certain time. The time taken for the velocity and amplitude of the shear waves to decrease reasonably corresponded to that taken for detectable crack propagation to occur on the surface of the rock specimen. The proposed method and materials may be useful from the viewpoints of rapid expansion, economy, and crack control. | Ahn, Chi-Hyung; Kim, Dong-Ju; Byun, Yong-Hoon | Korea Univ Technol & Educ, Sch Elect Elect & Commun Engn, Cheonan Si 31253, South Korea; Kyungpook Natl Univ, Sch Agr Civil & Bioind Engn, Daegu 41566, South Korea | Byun, Yong-Hoon/JKI-8441-2023 | 57220918268; 7409760881; 42761048000 | chahn@koreatech.ac.kr;kyrix1028@knu.ac.kr;yhbyun@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 21 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 1.43 | 2025-06-25 | 5 | 5 | crack propagation; expansion; heater; piezoelectric transducer; rock fracture | VIBRATION; DENSITY; VELOCITIES; MECHANISM; MODEL | Crack propagation; Expansion; Heater; Piezoelectric transducer; Rock fracture | English | 2020 | 2020-11 | 10.3390/s20216054 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Extrinsic Calibration between Camera and LiDAR Sensors by Matching Multiple 3D Planes | This paper proposes a simple extrinsic calibration method for a multi-sensor system which consists of six image cameras and a 16-channel 3D LiDAR sensor using a planar chessboard. The six cameras are mounted on a specially designed hexagonal plate to capture omnidirectional images and the LiDAR sensor is mounted on the top of the plates to capture 3D points in 360 degrees. Considering each camera-LiDAR combination as an independent multi-sensor unit, the rotation and translation between the two sensor coordinates are calibrated. The 2D chessboard corners in the camera image are reprojected into 3D space to fit to a 3D plane with respect to the camera coordinate system. The corresponding 3D point data that scan the chessboard are used to fit to another 3D plane with respect to the LiDAR coordinate system. The rotation matrix is calculated by aligning normal vectors of the corresponding planes. In addition, an arbitrary point on the 3D camera plane is projected to a 3D point on the LiDAR plane, and the distance between the two points are iteratively minimized to estimate the translation matrix. At least three or more planes are used to find accurate external parameters between the coordinate systems. Finally, the estimated transformation is refined using the distance between all chessboard 3D points and the LiDAR plane. In the experiments, quantitative error analysis is done using a simulation tool and real test sequences are also used for calibration consistency analysis. | Kim, Eung-su; Park, Soon-Yong | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | Park, Soon-Yong/HGV-2374-2022 | 57188702879; 7501834063 | jsm80607@naver.com;sypark@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 1 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 3.93 | 2025-06-25 | 66 | 75 | camera; LiDAR; calibration; plane matching; ICP; projection | Calibration; Camera; ICP; LiDAR; Plane matching; Projection | Calibration; Cameras; Iterative methods; Consistency analysis; Extrinsic calibration; Multi-sensor systems; Omnidirectional image; Plane matching; Projection; Quantitative error analysis; Translation matrices; Optical radar | English | 2020 | 2020-01 | 10.3390/s20010052 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Geo-Social Top-k and Skyline Keyword Queries on Road Networks | The rapid growth of GPS-enabled mobile devices has popularized many location-based applications. Spatial keyword search which finds objects of interest by considering both spatial locations and textual descriptions has become very useful in these applications. The recent integration of social data with spatial keyword search opens a new service horizon for users. Few previous studies have proposed methods to combine spatial keyword queries with social data in Euclidean space. However, most real-world applications constrain the distance between query location and data objects by a road network, where distance between two points is defined by the shortest connecting path. This paper proposes geo-social top-k keyword queries and geo-social skyline keyword queries on road networks. Both queries enrich traditional spatial keyword query semantics by incorporating social relevance component. We formalize the proposed query types and appropriate indexing frameworks and algorithms to efficiently process them. The effectiveness and efficiency of the proposed approaches are evaluated using real datasets. | Attique, Muhammad; Afzal, Muhammad; Ali, Farman; Mehmood, Irfan; Ijaz, Muhammad Fazal; Cho, Hyung-Ju | Sejong Univ, Dept Software, Seoul 05006, South Korea; Univ Bradford, Fac Engn & Informat, Bradford BD7 1DP, W Yorkshire, England; Dongguk Univ, Dept Ind & Syst Engn, Seoul 04620, South Korea; Kyungpook Natl Univ, Dept Software, Sangju Si 37224, South Korea | ; ali, farman/AAA-9677-2020; Ali, Farman/AAA-9677-2020; Ijaz, Muhammad Fazal/Q-3944-2019; Afzal, Muhammad/D-3741-2019 | 55755354900; 7102789390; 56645835400; 36628922400; 57189886891; 55177091600 | attique@sejong.ac.kr;mafzal@sejong.ac.kr;farmankanju@sejong.ac.kr;irfanmehmood@ieee.org;fazal@dongguk.edu;hyungju@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 3 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.98 | 2025-06-25 | 15 | 16 | top-k spatial keyword queries; skyline queries; location-based social networks; geo-social queries | INDEX | Geo-social queries; Location-based social networks; Skyline queries; Top-k spatial queries | Location; Mobile telecommunication systems; Motor transportation; Roads and streets; Search engines; Semantics; Effectiveness and efficiencies; Geo-social queries; Indexing framework; Location-based applications; Location-based social networks; Skyline query; Spatial queries; Textual description; algorithm; article; human; semantics; social network; Query processing | English | 2020 | 2020-02 | 10.3390/s20030798 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Global Motion-Aware Robust Visual Object Tracking for Electro Optical Targeting Systems | Although recently developed trackers have shown excellent performance even when tracking fast moving and shape changing objects with variable scale and orientation, the trackers for the electro-optical targeting systems (EOTS) still suffer from abrupt scene changes due to frequent and fast camera motions by pan-tilt motor control or dynamic distortions in field environments. Conventional context aware (CA) and deep learning based trackers have been studied to tackle these problems, but they have the drawbacks of not fully overcoming the problems and dealing with their computational burden. In this paper, a global motion aware method is proposed to address the fast camera motion issue. The proposed method consists of two modules: (i) a motion detection module, which is based on the change in image entropy value, and (ii) a background tracking module, used to track a set of features in consecutive images to find correspondences between them and estimate global camera movement. A series of experiments is conducted on thermal infrared images, and the results show that the proposed method can significantly improve the robustness of all trackers with a minimal computational overhead. We show that the proposed method can be easily integrated into any visual tracking framework and can be applied to improve the performance of EOTS applications. | Kim, Byeong Hak; Lukezic, Alan; Lee, Jong Hyuk; Jung, Ho Min; Kim, Min Young | Kyungpook Natl Univ, Sch Elect Engn, Daehakro 80, Daegu 41566, South Korea; Hanwha Syst Co, 1gongdanro, Gumi 39376, South Korea; Univ Ljubljana, Fac Comp & Informat Sci, Ljubljana 1501, Slovenia; Kyungpook Natl Univ, Res Ctr Neurosurg Robot Syst, Daehakro 80, Daegu 41566, South Korea | 56406686400; 56613479600; 57208132362; 57214102403; 56739349100 | durumy98@knu.ac.kr;alan.lukezic@fri.uni-lj.si;leewer354@knu.ac.kr;ytr789@knu.ac.kr;minykim@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 2 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.38 | 2025-06-25 | 5 | 5 | visual object tracking; camera motion; motion aware; robust tracking | Camera motion; Motion aware; Robust tracking; Visual object tracking | Cameras; Deep learning; Infrared imaging; Tracking (position); Camera motions; Computational burden; Computational overheads; Dynamic distortions; Motion aware; Robust tracking; Thermal infrared images; Visual object tracking; article; entropy; eye tracking; infrared radiation; motion; writing; Image enhancement | English | 2020 | 2020-01 | 10.3390/s20020566 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Horizontally Elongated Time Domain Reflectometry System for Evaluation of Soil Moisture Distribution | The objective of this study was to develop a horizontally elongated time domain reflectometry (HETDR) system to evaluate the water content in nonuniformly wetted soils. The HETDR probe consists of three rods of stainless steel and a cuboid head: A center electrode and two outer electrodes are connected to the inner and outer conductors of a coaxial cable, respectively. An acrylic container divided into several segments was used to prepare nonuniformly wetted soils with different water contents for a series of model tests. The HETDR probe was placed horizontally at the middle height of each soil specimen, while a conventional time domain reflectometry (TDR) probe was applied vertically on the surface of the specimen. The experimental results show that as the soil water content (SWC) at a segment increases, the average amplitude decreases and the duration increases. The estimated SWC increases with the measured SWC, and especially, the difference between actual segment length and the segment length estimated from the HETDR probes is significant under dry conditions. This study demonstrates that HETDR may be a promising field-testing method for evaluating the average water content in nonuniformly wetted soils. | Kim, Dong-Ju; Yu, Jung-Doung; Byun, Yong-Hoon | Kyungpook Natl Univ, Sch Agr Civil & Bioind Engn, Daegu 41566, South Korea; Korea Univ, Sch Civil Environm & Architectural Engn, Seoul 02841, South Korea | Byun, Yong-Hoon/JKI-8441-2023; Yu, Jungdoung/GRR-3547-2022 | 7409760881; 55261077800; 42761048000 | kyrix1028@knu.ac.kr;noorung2@korea.ac.kr;yhbyun@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 23 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.53 | 2025-06-25 | 10 | 12 | elongated probe; moisture distribution; soil water content; time domain reflectometry | WATER-CONTENT; ELECTRICAL-CONDUCTIVITY; ELECTROMAGNETIC DETERMINATION; TDR; APPLICABILITY; SENSITIVITY; TILLAGE; PROBES | Elongated probe; Moisture distribution; Soil water content; Time domain reflectometry | Electrodes; Permittivity measurement; Probes; Reflection; Reflectometers; Soil testing; Wetting; Different water contents; Field testing; Segment lengths; Soil moisture distribution; Soil specimens; Soil water content; Time domain reflectometry; Time domain reflectometry probes; Soil moisture | English | 2020 | 2020-12 | 10.3390/s20236834 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Improving Object Tracking by Added Noise and Channel Attention | CNN-based trackers, especially those based on Siamese networks, have recently attracted considerable attention because of their relatively good performance and low computational cost. For many Siamese trackers, learning a generic object model from a large-scale dataset is still a challenging task. In the current study, we introduce input noise as regularization in the training data to improve generalization of the learned model. We propose an Input-Regularized Channel Attentional Siamese (IRCA-Siam) tracker which exhibits improved generalization compared to the current state-of-the-art trackers. In particular, we exploit offline learning by introducing additive noise for input data augmentation to mitigate the overfitting problem. We propose feature fusion from noisy and clean input channels which improves the target localization. Channel attention integrated with our framework helps finding more useful target features resulting in further performance improvement. Our proposed IRCA-Siam enhances the discrimination of the tracker/background and improves fault tolerance and generalization. An extensive experimental evaluation on six benchmark datasets including OTB2013, OTB2015, TC128, UAV123, VOT2016 and VOT2017 demonstrate superior performance of the proposed IRCA-Siam tracker compared to the 30 existing state-of-the-art trackers. | Fiaz, Mustansar; Mahmood, Arif; Baek, Ki Yeol; Farooq, Sehar Shahzad; Jung, Soon Ki | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea; Informat Technol Univ, Dept Comp Sci, Lahore 54000, Pakistan | Mahmood, Arif/R-7949-2019; Jung, Soon Ki/P-7687-2018 | 57208735843; 55636036300; 57217701384; 57217701362; 57226791905 | mustansar@knu.ac.kr;arif.mahmood@itu.edu.pk;qkkndq@knu.ac.kr;sehar146@knu.ac.kr;skjung@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 13 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.53 | 2025-06-25 | 10 | 11 | Siamese networks; convolutional neural network; visual tracking; noise regularization; attentional mechanism | SIAMESE NETWORKS; VISUAL TRACKING | Attentional mechanism; Convolutional neural network; Noise regularization; Siamese networks; Visual tracking | Additive noise; Benchmarking; Fault tolerance; Large dataset; Benchmark datasets; Computational costs; Experimental evaluation; Large-scale dataset; Off-line learning; Over fitting problem; State of the art; Target localization; article; attention; convolutional neural network; eye tracking; learning; noise; Object tracking | English | 2020 | 2020-07 | 10.3390/s20133780 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | In Situ Characterization of Micro-Vibration in Natural Latex Membrane Resembling Tympanic Membrane Functionally Using Optical Doppler Tomography | Non-invasive characterization of micro-vibrations in the tympanic membrane (TM) excited by external sound waves is considered as a promising and essential diagnosis in modern otolaryngology. To verify the possibility of measuring and discriminating the vibrating pattern of TM, here we describe a micro-vibration measurement method of latex membrane resembling the TM. The measurements are obtained with an externally generated audio stimuli of 2.0, 2.2, 2.8, 3.1 and 3.2 kHz, and their respective vibrations based tomographic, volumetric and quantitative evaluations were acquired using optical Doppler tomography (ODT). The micro oscillations and structural changes which occurred due to diverse frequencies are measured with sufficient accuracy using a highly sensitive ODT system implied phase subtraction method. The obtained results demonstrated the capability of measuring and analyzing the complex varying micro-vibration of the membrane according to implied sound frequency. | Seong, Daewoon; Kwon, Jaehwan; Jeon, Deokmin; Wijesinghe, Ruchire Eranga; Lee, Jaeyul; Ravichandran, Naresh Kumar; Han, Sangyeob; Lee, Junsoo; Kim, Pilun; Jeon, Mansik; Kim, Jeehyun | Kyungpook Natl Univ, Coll IT Engn, Sch Elect Engn, Daegu 41566, South Korea; Kyungil Univ, Coll Engn, Dept Biomed Engn, Gyongsan 38428, South Korea; Kyungpook Natl Univ, Sch Med, Inst Biomed Engn, Daegu 41944, South Korea | ; Lee, Jung Bok/HHZ-3200-2022; Wijesinghe, Ruchire/K-3797-2016; Kim, Jinhyun/AAK-3695-2020; RAVICHANDRAN, NARESH KUMAR/D-2190-2017; Lee, Junsoo/IUO-9627-2023 | 57212512353; 57212506884; 57204570554; 56018152300; 57188689420; 57125825900; 57193695305; 57209986073; 56967482800; 24171094000; 7601373350 | smc7095@knu.ac.kr;luffy6462@naver.com;dmjeon@knu.ac.kr;eranga@kiu.kr;jaeyul@knu.ac.kr;nareshr.9169@gmail.com;progkiller@paran.com;jslee5399@knu.ac.kr;pukim@knu.ac.kr;msjeon@knu.ac.kr;jeehk@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 1 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.68 | 2025-06-25 | 15 | 14 | micro-vibration; latex membrane; localized distribution of sound; optical Doppler tomography | COHERENCE TOMOGRAPHY; HIGH-SPEED; MOTION; VIVO; PHASE; VIBROMETRY; PRINCIPLES; AUDIOMETRY; SURFACE; RANGE | Latex membrane; Localized distribution of sound; Micro-vibration; Optical Doppler tomography | Membranes; Tomography; Vibration measurement; In-situ characterization; Microvibration measurement; Microvibrations; Optical doppler tomography; Phase subtraction; Quantitative evaluation; Sound frequency; Tympanic membranes; Vibration analysis | English | 2020 | 2020-01 | 10.3390/s20010064 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Instrumented Cone Penetrometer for Dense Layer Characterization | Subsurface characterization is essential for a successful infrastructure design and construction. This paper demonstrates the use of an instrumented cone penetrometer (ICP) for a dense layer characterization at two sites. The ICP consists of a cone tip and rods equipped with an accelerometer and four strain gauges, which allow dynamic driving, in addition to quasi-static pushing of the cone. The force and velocity of the cone are measured using the ICP instrumentation and compared with the N value, dynamic cone penetration index, and static cone resistance. A strong correlation has been observed between the total cone resistance estimated from the ICP and the dynamic cone penetration index and static cone resistance. After the correction of the dynamic cone resistance effect, the static component of the total cone resistance can be used as an alternative to a static cone resistance. This novel approach of soil resistance estimation using the ICP may be useful for dense layer characterization. | Lee, Jong-Sub; Byun, Yong-Hoon | Korea Univ, Sch Civil Environm & Architectural Engn, Seoul 02841, South Korea; Kyungpook Natl Univ, Sch Agr Civil & Bioind Engn, Daegu 41566, South Korea | Byun, Yong-Hoon/JKI-8441-2023; Lee, Jong-Sub/G-2752-2012 | 55690048400; 42761048000 | jongsub@korea.ac.kr;yhbyun@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 20 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.68 | 2025-06-25 | 14 | 17 | cone penetrometer; dense layer; dynamic response; in situ test; subsurface characterization | PENETRATION RESISTANCE; SUBGRADE; DCP; CPT | Cone penetrometer; Dense layer; Dynamic response; In situ test; Subsurface characterization | Cone penetrometers; Cone resistance; Dynamic cone penetration indices; Infrastructure design; Quasi-static; Resistance estimation; Strong correlation; Subsurface characterizations | English | 2020 | 2020-10 | 10.3390/s20205782 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Learning Soft Mask Based Feature Fusion with Channel and Spatial Attention for Robust Visual Object Tracking | We propose to improve the visual object tracking by introducing a soft mask based low-level feature fusion technique. The proposed technique is further strengthened by integrating channel and spatial attention mechanisms. The proposed approach is integrated within a Siamese framework to demonstrate its effectiveness for visual object tracking. The proposed soft mask is used to give more importance to the target regions as compared to the other regions to enable effective target feature representation and to increase discriminative power. The low-level feature fusion improves the tracker robustness against distractors. The channel attention is used to identify more discriminative channels for better target representation. The spatial attention complements the soft mask based approach to better localize the target objects in challenging tracking scenarios. We evaluated our proposed approach over five publicly available benchmark datasets and performed extensive comparisons with 39 state-of-the-art tracking algorithms. The proposed tracker demonstrates excellent performance compared to the existing state-of-the-art trackers. | Fiaz, Mustansar; Mahmood, Arif; Jung, Soon Ki | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea; Informat Technol Univ, Dept Comp Sci, Lahore 54000, Pakistan | ; Mahmood, Arif/R-7949-2019; Jung, Soon Ki/P-7687-2018 | 57208735843; 55636036300; 57226791905 | mustansar@knu.ac.kr;arif.mahmood@itu.edu.pk;skjung@knu.ac.kr; | SENSORS | SENSORS-BASEL | 1424-8220 | 20 | 14 | SCIE | CHEMISTRY, ANALYTICAL;ENGINEERING, ELECTRICAL & ELECTRONIC;INSTRUMENTS & INSTRUMENTATION | 2020 | 3.576 | 21.1 | 0.68 | 2025-06-25 | 17 | 14 | Siamese networks; convolutional neural network; visual tracking; attentional mechanism | SIAMESE NETWORKS | Attentional mechanism; Convolutional neural network; Siamese networks; Visual tracking | Object recognition; Benchmark datasets; Discriminative power; Low-level features; Spatial attention; State of the art; Target representation; Tracking algorithm; Visual object tracking; article; attention; convolutional neural network; eye tracking; learning; Object tracking | English | 2020 | 2020-07 | 10.3390/s20144021 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: