연구성과로 돌아가기
2020 연구성과 (119 / 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 | Resonance parameters of Gd isotopes derived from capture measurements at GELINA | Neutron capture yields for Gd-155, Gd-156, Gd-157, Gd-158, and Gd-160 were determined applying the total energy detection principle technique using four C6D6 liquid scintillators and a 10B-loaded ionization chamber. Time-of-flight experiments were carried out at a 30 m flight path station of the GELINA facility using enriched samples. Parameters for resonances in the energy region between 5 and 500 eV were obtained from a resonance shape analysis with REFIT. Resonance integrals for Gd-155 and Gd-157 derived from the parameters are 1511 (25) b and 801 (19) b, respectively. Average level spacings, average radiation widths and neutron strength functions were derived. The results were compared with data that are reported in the literature and recommended in evaluated data libraries. | Kye, Yong-uk; Shin, Sung-gyun; Cho, Moo-hyun; Namkung, Won; Kim, Guinyun; Schillebeeckx, Peter; Paradela, Carlos; Kopecky, Stefan | Pohang Univ Sci & Technol, Pohang Accelerator Lab, Pohang 37673, Gyeongbuk, South Korea; Pohang Univ Sci & Technol, Div Adv Nucl Engn, Pohang 37673, Gyeongbuk, South Korea; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; European Commiss, Joint Res Ctr, Directorate G, Retieseweg 111, B-2440 Geel, Belgium | Paradela, Carlos/J-1492-2012 | 56020858600; 55770867100; 17136702900; 7005430557; 35313854400; 8628154500; 57191342147; 7005788253 | gnkim@knu.ac.kr; | EUROPEAN PHYSICAL JOURNAL A | EUR PHYS J A | 1434-6001 | 1434-601X | 56 | 2 | SCIE | PHYSICS, NUCLEAR;PHYSICS, PARTICLES & FIELDS | 2020 | 3.043 | 34.2 | 0 | 2025-06-25 | 3 | 0 | CROSS-SECTION MEASUREMENTS; NEUTRON-CAPTURE; NUCLEAR-PHYSICS | English | 2020 | 2020-02-04 | 10.1140/epja/s10050-020-00047-6 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Three-Dimensional Evaluation of Peri-implant Soft Tissue When Tapered Implants Are Placed: Pilot Study with Implants Placed Immediately or Early Following Tooth Extraction | Purpose: This study examined a new 3D volumetric analysis method for the assessment of baseline-to-12-month changes of the soft tissue volume at early and immediately placed tapered implants after loading with ceramic single crowns. Materials and Methods: Eligible patients with one incisor, canine, or premolar to be extracted were included. The patients were divided randomly into early-placement or immediate-placement groups. Tapered implants (BLT, Institut Straumann) were placed after the extractions. In the early-placement group, the implants were placed 8 weeks after extraction. In the immediate-placement group, the implants were placed immediately after the extraction. All implants healed transmucosally, and the final crowns were inserted after healing (baseline). Impressions were made at screening, baseline, and 12 months after crown insertion (Permadyne, 3M). The casts were scanned (Imetric 4D) and aligned, and a superimposed area of interest (A01) (labial/buccal aspects) was defined to assess the volumetric changes (GOM Inspect). Specific software (3-Matic, Materialise NV) was used for volumetric analysis. The vertical mucosal recession was measured at each time point. Repeated-measures one-way analysis of variance and the Tukey method were used for statistical analysis (SPSS 22, IBM). Results: Twenty tapered implants (16 regular and four narrow) were placed in 20 patients (12 men and 8 women) in the early-placement (EP; n = 10) and immediate-placement (IP; n = 10) groups, respectively. Three-dimensional volumetric analysis revealed soft tissue volume loss in both groups of 10.0 +/- 16.5 mm(3) (EP) and 24.3 +/- 21.3 mm(3) (IP) between baseline and 12 months (P = .6). The analysis also revealed local differences in the changes, displaying both localized gain and loss in both groups. Conclusion: With this novel 3D analysis method, true volumetric soft tissue differences, ie, both localized gain and loss, were specified between the treatment groups. | Lee, Hyeonjong; Fehmer, Vincent; Hicklin, Stefan; Noh, Gunwoo; Hong, Seoung-Jin; Sailer, Irena | Univ Geneva, Univ Clin Dent, Div Fixed Prosthodont & Biomat, Geneva, Switzerland; Pusan Natl Univ, Sch Dent, Dent & Life Sci Inst, Dept Prosthodont,Dent Res Inst, Yangsan, South Korea; Kyungpook Natl Univ, Sch Mech Engn, Daegu, South Korea; Kyung Hee Univ, Sch Dent, Dept Prosthodont, Seoul, South Korea | ; Lee, Hyeonjong/HDM-6492-2022 | 57190951278; 56211065700; 33167664200; 55010264000; 57191958493; 7801463911 | Irena.Sailer@unige.ch; | INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS | INT J ORAL MAX IMPL | 0882-2786 | 1942-4434 | 35 | 5 | SCIE | DENTISTRY, ORAL SURGERY & MEDICINE | 2020 | 2.804 | 34.2 | 0.58 | 2025-06-25 | 11 | 11 | dental implants; early placement; immediate placement; soft tissue changes; volumetric analysis | RIDGE PRESERVATION; VOLUMETRIC-ANALYSIS; BONE; STABILITY; SITES; AUGMENTATION; THICKNESS; SPACE | dental implants; early placement; immediate placement; soft tissue changes; volumetric analysis | Crowns; Dental Implantation, Endosseous; Female; Humans; Male; Pilot Projects; Tooth Extraction; Tooth Socket; biomedical and dental materials; dental ceramics; adult; alveolar ridge; analysis of variance; Article; canine tooth; cheek; clinical article; controlled study; data analysis software; female; follow up; healing; human; incisor; lateral incisor; lip; male; pilot study; premolar tooth; randomized controlled trial; soft tissue; three dimensional volumetric analysis; tooth extraction; virtual reality; volumetry; diagnostic imaging; surgery; tooth crown; tooth implantation; tooth socket | English | 2020 | 2020 (SEP-OCT) | 10.11607/jomi.7879 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | A Non-Negative Matrix Factorization-Based Framework for the Analysis of Multi-Class Time-Series Single-Cell RNA-Seq Data | The development of single-cell RNA sequencing (scRNA-seq) has enabled gene expression to be quantified at single-cell resolution. Such advancement is expected to solve important issues that bulk RNA sequencing could not fully answer, such as inferring cell population heterogeneity, genetic variability of cells, detecting rare cell types, accurately predicting cell states and their localization. However, analyzing such large scale data, especially when they are sampled at multiple time points, brings new challenges in data mining informative genes, compared to single snapshot samples. It becomes even more complicated when gene expression patterns are to be mined from time-series scRNA-seq datasets generated from multiple conditions, which will constitute a data with gene, condition and time dimensions. Here, we focused on detecting gene expression patterns that well capture the underlying biological differences between time-series scRNA-seq datasets of three different types of stem cells. The gene expression profile of 2,128 time-series scRNA-seq samples from long-term hematopoietic stem cells (LT-HSC) and two of its progenitor cell types were analyzed using our framework. We have successfully detected condition specific feature genes that were able to achieve 90.03 & x0025; classification accuracy between the three cell types. Investigating the genes and clusters detected by our framework, we found that cell cycle related genes showed significantly high variance between the three cell types. Such results and transcriptomic characters detected from our analysis were consistent with the original study. Collectively, the framework was able to successfully detect biological meaningful gene sets and expression patterns from multi-condition time-series scRNA-seq samples. | Jung, Inuk; Choi, Joungmin; Chae, Heejoon | Kyungpook Natl Univ, Dept Comp Sci & Engn, Daegu 41566, South Korea; Sookmyung Womens Univ, Dept Comp Sci, Seoul 04310, South Korea | Jung, Inuk/T-1981-2018 | 56067575500; 57205150304; 36560992300 | heechae@sookmyung.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.08 | 2025-06-25 | 3 | 2 | Matrix decomposition; Gene expression; Sociology; Statistics; Stem cells; Tools; Mice; Gene expression; multi-class; single-cell; time-series | DIFFERENTIATION; NETWORKS | Gene expression; multi-class; single-cell; time-series | Cell culture; Cell proliferation; Data mining; Factorization; Gene expression; RNA; Stem cells; Time series; Cell population heterogeneity; Classification accuracy; Gene expression patterns; Gene expression profiles; Hematopoietic stem cells; multi-class; Nonnegative matrix factorization; Single cells; Time series analysis | English | 2020 | 2020 | 10.1109/access.2020.2977106 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | A Novel ReRAM-Based Architecture of Field Sequential Color Driver for High-Resolution LCoS Displays | Liquid crystal on-silicon (LCoS) display is one of the most representative micro-display technologies, and is widely adopted in virtual reality (VR) and augmented reality (AR) devices thanks to a relatively simple structure using a semiconductor manufacturing process to realize high-resolution displays. However, the structural complexity to handle color frames by field sequential color (FSC) scheme hinders more widespread adoptions of the LCoS displays. In this article, to resolve the problem, we propose a novel FSC driver architecture using resistive random access memory (ReRAM) that diminishes the driver's structural complexity with matrix-vector multiplications. The proposed architecture leverages fast matrix-vector multiplications with a memristor crossbar array to expedite the FSC operation that extracts the individual red, green, and blue color sub-frames from an entire image. We present the hardware performance of our architecture that is implemented using the crossbar array and peripheral circuits. Compared to the conventional static random access memory (SRAM)-based architecture, we confirm that the proposed design is much superior in terms of chip size, leakage power, and frame rate in various image resolutions. Specifically, the chip size and leakage power are reduced by up to 96% and 99%, respectively, and the frame rate is improved by up to 36%. We also analyze image quality loss caused by ReRAM read and write noise. | Han, Youngsun; Kim, Dongmin; Kim, Yongtae | Pukyong Natl Univ, Dept Comp Engn, Busan 48513, South Korea; Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea | 7404096461; 57560814900; 55699627900 | yongtae@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.16 | 2025-06-25 | 3 | 3 | Power capacitors; Image color analysis; Memristors; Arrays; Computer architecture; Liquid crystal displays; Complexity theory; ReRAM (resistive random access memory); memristor crossbar; LCoS (liquid crystal-on-silicon); FSC (field sequential color); high-resolution displays | LIQUID-CRYSTAL; DEVICES; DESIGN; ENERGY | FSC (field sequential color); high-resolution displays; LCoS (liquid crystal-on-silicon); memristor crossbar; ReRAM (resistive random access memory) | Augmented reality; Color; Crystal structure; Image resolution; Liquid crystals; Memory architecture; Optical projectors; Rhenium compounds; RRAM; Semiconductor device manufacture; Semiconductor devices; Static random access storage; Field sequential color; High resolution display; Liquid-crystal-on-silicon displays; Matrix vector multiplication; Proposed architectures; Resistive Random Access Memory (ReRAM); Semiconductor manufacturing process; Static random access memory; Field emission displays | English | 2020 | 2020 | 10.1109/access.2020.3044496 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | A Piezoelectric Bellows Round-Window Driver (PBRD) for Middle-Ear Implants | We describe a new implantable hearing-aid output device, a piezoelectric bellows round-window driver (PBRD), which is expected to be unaffected by external magnetic fields. The core elements of the PBRD are a piezoelectric element and a gold-coated copper bellows of low stiffness that transmits piezoelectric displacements, without significant attenuation, to the round window (RW). We analyzed structural and mechanical vibrations when confirming bellows transmission efficiency using a finite element model simulation. The PBRD was bench-tested under no-load conditions to determine its frequency response characteristics. We compared the outputs of the PBRD and a commercial floating-mass transducer in situ in human cadaveric temporal bones with responses measured using a laser Doppler vibrometer. PBRD outputs were excellent at both low (0.1-0.7 kHz) and high (2-16 kHz) frequencies; thus, the PBRD has the potential to compensate for conductive and/or sensorineural hearing loss. The frequency-response performance of the PBRD is better than that of conventional RW drivers (actuators or transducers). | Shin, Dong Ho; Seong, Ki Woong; Nakajima, Hideko Heidi; Puria, Sunil; Cho, Jin-Ho | Kyungpook Natl Univ, Inst Biomed Engn Res, Daegu 41944, South Korea; Kyungpook Natl Univ Hosp, Dept Biomed Engn, Daegu 41944, South Korea; Harvard Med Sch, Massachusetts Eye & Ear, Dept Otolaryngol, Boston, MA 02114 USA | Puria, Sunil/CAI-6731-2022 | 56693502600; 23968197900; 47661357200; 6603522130; 57388235200 | jhcho@ee.knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.58 | 2025-06-25 | 9 | 12 | Bellows; Finite element analysis; Vibrations; Transducers; Implants; Magnetic fields; Magnetic resonance imaging; Piezoelectric bellows round-window driver (PBRD); middle-ear implants; finite element analysis; human temporal bone; conductive or sensorineural hearing loss | FLOATING-MASS TRANSDUCER; COUPLER | conductive or sensorineural hearing loss; finite element analysis; human temporal bone; middle-ear implants; Piezoelectric bellows round-window driver (PBRD) | Audition; Frequency response; Gold coatings; Hearing aids; Piezoelectricity; Transducers; Vibration analysis; External magnetic field; Floating mass transducers; Frequency response characteristic; Laser Doppler vibrometers; Piezoelectric elements; Response performance; Sensorineural hearing loss; Transmission efficiency; Bellows | English | 2020 | 2020 | 10.1109/access.2020.3010539 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | A Simultaneous Drug Release Scheme for Targeted Drug Delivery Using Molecular Communications | In this paper, we consider drug release-time issue in molecular communication-based targeted drug delivery (MC-based TDD) systems. Typically, a trigger source sends out a signal to multiple nanomachines to indicate them when to release the drugs in a simultaneous manner. However, under a practical setting where the nanomachines are located at unequal distances from the source and the propagation delay of an MC channel is proportional to the third power of distance, the trigger signal may arrive at different times causing the nanomachines to release the drugs in a nonsimultaneous manner. This causes release-time errors. Therefore, we propose a simultaneous drug-release scheme to determine the precise time to emit the trigger signal, taking into account the propagation delay information to minimize the release-time errors. Using both analytical and simulation approach, we demonstrate the effectiveness of the proposed scheme in reducing the release-time errors, highlighting its robustness to large propagation delays. Additionally, we show that the analytical model is in good agreement with the simulation. | Islam, Tania; Shitiri, Ethungshan; Cho, Ho-Shin | Kyungpook Natl Univ, Sch Elect Engn, Daegu 41556, South Korea | ; Shitiri, Ph.D., Ethungshan/Z-5918-2019 | 59634744500; 57190818428; 35316924900 | hscho@ee.knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.74 | 2025-06-25 | 7 | 10 | Drugs; Nanobioscience; Targeted drug delivery; Propagation delay; Receivers; Delays; Molecular communication; Molecular communication; nanomedicine; nanonetworks; release-time; targeted drug delivery | SYSTEMS; SYNCHRONIZATION; NANOMACHINES; MODULATION | Molecular communication; Nanomedicine; Nanonetworks; Release-time; Targeted drug delivery | Controlled drug delivery; Errors; Nanotechnology; Drug release; Large propagation delays; Molecular communication; Nanomachines; Non-simultaneous; Propagation delays; Release time; Simulation approach; Targeted drug delivery | English | 2020 | 2020 | 10.1109/access.2020.2994493 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Adaptive Abstraction-Level Conversion Framework for Accelerated Discrete-Event Simulation in Smart Semiconductor Manufacturing | Speeding up the simulation of discrete-event wafer-fabrication models is essential for fast decision-making to handle unexpected events in smart semiconductor manufacturing because decision-parameter optimization requires repeated simulation execution based on the current manufacturing situation. In this paper, we present a runtime abstraction-level conversion approach for discrete-event fab models to gain simulation speedup. During the simulation, if the fab's machine group model reaches a steady state, then the proposed method attempts to substitute this group model with a mean-delay model (MDM) as a high abstraction level model. The MDM abstracts detailed event-driven operations of subcomponents in the group into an average delay based on the queuing modeling, which can guarantee acceptable accuracy in predicting the performance of steady-state queuing systems. To detect the steadiness, the proposed abstraction-level converter (ALC) observes the queuing parameters of low-level groups to identify the statistical convergence of each group's work-in-progress (WIP) level. When a group's WIP level is converged, the output-to-input couplings between the models are revised to change a wafer-lot process flow from the low-level group to a MDM. When the ALC detects lot-arrival changes or any wafer processing status change (e.g., a machine-down), the high-level model is switched back to its corresponding low-level group model. During high-to-low level conversion, the ALC generates dummy wafer-lot events to re-initialize the machine states. The proposed method was applied to various case studies of wafer-fab systems and achieved simulation speedups up to about 4 times with 0.6 to 8.3% accuracy degradations. | Seok, Moon Gi; Cai, Wentong; Sarjoughian, Hessam S.; Park, Daejin | Nanyang Technol Univ, Sch Compute Sci & Engn SCSE, Singapore 639798, Singapore; Arizona State Univ, Arizona Ctr Integrat Modeling & Simulat ACIMS, Tempe, AZ 85281 USA; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | ; Cai, Wentong/A-3720-2011 | 36683242700; 7401711207; 6701570994; 55463943600 | aswtcai@ntu.edu.sg; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.33 | 2025-06-25 | 2 | 6 | Semiconductor device modeling; Adaptation models; Steady-state; Production; Data models; Mathematical model; Load modeling; Abstraction-level conversion; wafer fabrication; discrete-event modeling; smart manufacturing | OPTIMIZATION | Abstraction-level conversion; Discrete-event modeling; Smart manufacturing; Wafer fabrication | Decision making; Queueing theory; Semiconductor device manufacture; Silicon wafers; Abstraction level; High-level modeling; Queuing parameters; Run-time abstractions; Semiconductor manufacturing; Simulation speed-up; Statistical convergence; Wafer fabrications; Discrete event simulation | English | 2020 | 2020 | 10.1109/access.2020.3022275 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | An Efficient Region Precise Thresholding and Direct Hough Transform in Femur and Femoral Neck Segmentation Using Pelvis CT | This study proposed a fully-automated method for the segmentation of the femur and femoral neck in volumetric computed tomography (CT) images for the evaluation of osteoporotic fractures with severe abnormalities. We evaluated the proposed method on pelvis CT image of 30 patients for both the left and right sides. The proposed framework consists of three components: (1) localization of the acetabulum from the femoral head by tracing the intensity and adjacent neighbors of bone pixels, (2) segmentation and enhancement of the femur from its surrounding tissue using multi-level thresholding with filtering techniques, and (3) extraction of femoral neck contours using a directed Hough transform with oriented contour-filling techniques. The quality of the proposed femur segmentation performance was compared with the segmentation results using an edge-based active contour model (ACM), active shape model (ASM) and ground truth including average precision, recall, false-positive rate (FPR), false-negative rate (FNR), and the Dice similarity coefficient (DSC). The proposed method showed error of less than 1% for femur segmentation. A highly satisfactory similarity agreement was achieved between automated and manual methods, with a DSC greater than 94.8-exceeding those of semi-automated segmentations of the femur. Quantitative and qualitative experimental results indicated that the proposed fully-automated approach was capable of accurately segmenting the femur and femoral neck, which suggests the possibility of reducing insignificant contours of bone structures for further assessment of risk for osteoporotic fractures. | Yun, Young-Ji; Ahn, Byeong-Cheol; Kavitha, Muthu Subash; Chien, Sung-Il | Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Nucl Med, Sch Med, Daegu 41944, South Korea; Kyungpook Natl Univ Hosp, Dept Nucl Med, Daegu 41944, South Korea; Hiroshima Univ, Grad Sch Adv Sci & Engn, Higashihiroshima 7398511, Japan | Kavitha, M.S./AAI-6438-2020 | 57215287582; 7202791511; 57218147465; 7201952405 | kavitha@hiroshima-u.ac.jp;sichien@ee.knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.58 | 2025-06-25 | 6 | 9 | Bones; Image segmentation; Neck; Computed tomography; Shape; Head; Hip; Acetabulum; bone segmentation; computed tomography; femoral neck; femur | BONE; FRAGMENTS; ACCURATE; FRACTURE; MODELS; SHAPE | Acetabulum; bone segmentation; computed tomography; femoral neck; femur | Automation; Bone; Hough transforms; Image segmentation; Risk assessment; Active contour model; Multilevel thresholding; Osteoporotic fractures; Segmentation performance; Segmentation results; Semi-automated segmentation; Similarity coefficients; Volumetric computed tomographies; Computerized tomography | English | 2020 | 2020 | 10.1109/access.2020.3001578 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | An Evolutionary Algorithm for Multi and Many-Objective Optimization With Adaptive Mating and Environmental Selection | Multi-objective evolutionary algorithms (MOEAs) have received immense recognition due to their effectiveness and efficiency in tackling multi-objective optimization problems (MOPs). Recently, numerous studies on MOEAs revealed that when handling many-objective optimization problems (MaOPs) that have more than three objectives, MOEAs encounter challenges and the behavior of MOEAs resembles a random walk in search space as the proportion of nondominated solutions increases subsequently. This phenomenon is commonly observed in most classical Pareto-dominance-based MOEAs (PDMOEAs) such as NSGA-II, SPEAII, as these algorithms face difficulties in guiding the search process towards the optimal Pareto front due to lack of selection pressure. From the literature, it is evident that incorporating sum of normalized objectives into the framework of MOEAs would enhance the converging capabilities. Hence, in this work, we propose a novel multi-objective optimization algorithm with adaptive mating and environmental selection (ad-MOEA) which effectively incorporates the concept of sum of objectives in the mechanisms of mating and environmental selection to control the convergence and diversity adaptively. To demonstrate the effectiveness of the proposed ad-MOEA, we have conducted experiments on 26 test problems that includes DTLZ, WFG and MaOP test suites. Along with the benchmark problem, we have analyzed the performance of the proposed approach on real-world problems. The experimental results demonstrate the effectiveness of the proposed method with respect to the state-of-art methods. | Palakonda, Vikas; Mallipeddi, Rammohan | Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Dept Artificial Intelligence, Daegu 41566, South Korea | Mallipeddi, Rammohan/AAL-5306-2020 | 57193028485; 25639919900 | mallipeddi.ram@gmail.com; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 1.15 | 2025-06-25 | 20 | 22 | Evolutionary computation; multi-objective optimization; many-objective optimization; Pareto-dominance; sum of normalized objectives; crowding distance | GENETIC ALGORITHM; NSGA-III; DOMINANCE; MOEA/D | crowding distance; Evolutionary computation; many-objective optimization; multi-objective optimization; Pareto-dominance; sum of normalized objectives | Benchmarking; Evolutionary algorithms; Bench-mark problems; Effectiveness and efficiencies; Many-objective optimizations; Multi objective evolutionary algorithms; Multiobjective optimization problems (MOPs); Nondominated solutions; Selection pressures; State-of-art methods; Multiobjective optimization | English | 2020 | 2020 | 10.1109/access.2020.2991752 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Assessment of the Inner Surface Roughness of 3D Printed Dental Crowns via Optical Coherence Tomography Using a Roughness Quantification Algorithm | Dental crowns are used to restore decayed or chipped teeth, where their surfaces play a key role in this restoration process, as they affect the fitting and stable bonding of the prostheses. The surface texture of crowns can interfere with this restoration process, therefore the measurement of their inner surface roughness is very important but difficult to achieve using conventional imaging methods. In this study, the inner surfaces of dental crowns were three-dimensionally (3D) visualized using swept-source optical coherence tomography (SS-OCT) system. Nine crowns were fabricated with a commercial 3D printer using three different hatching methods (one-way, cross, and 30 degrees angle counter-clockwise) and three different build direction angles (0 degrees, 45 degrees, and 90 degrees). In addition, an image processing algorithm was developed, which uses morphological filtering, boundary detection, and a high-pass frequency filtering technique, to quantitatively evaluate the inner surface roughness of the dental crowns cross-sections with the depth-of-focus set to match two different regions. The averaged smoothness of fabricated crown was effectively produced using the cross-hatching and the build direction angle of 90 degrees by the respective process. Thus, the results confirm the potential use of this methodology to determine the best parameters to use in 3D fabrication for improving the effectiveness and stability of dental prostheses. | Lee, Jaeyul; Abu Saleah, Sm; Jeon, Byeonggyu; Wijesinghe, Ruchire Eranga; Lee, Dong-Eun; 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; Kyungil Univ, Coll Smart Engn, Dept Autonomous Robot Engn, Gyongsan 38428, South Korea; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, Daegu 41566, South Korea | ; Lee, Junsoo/IUO-9627-2023; Wijesinghe, Ruchire/K-3797-2016 | 57188689420; 57218499446; 57209983204; 56018152300; 56605563300; 24171094000; 7601373350 | dolee@knu.ac.kr;msjeon@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.74 | 2025-06-25 | 17 | 18 | Dentistry; Rough surfaces; Surface roughness; Three-dimensional displays; Surface topography; Surface treatment; Imaging; 3D printing; dental crown; image processing; optical coherence tomography; surface roughness | HUMAN GINGIVAL SULCUS; MICROSCOPY; PROSTHESES; INSPECTION; ACCURACY; HARD | 3D printing; dental crown; image processing; optical coherence tomography; surface roughness | Dental prostheses; Optical data processing; Optical tomography; Prosthetics; Restoration; Surface roughness; Textures; Tomography; Boundary detection; Conventional imaging; Counter-clockwise; Frequency filtering; Image processing algorithm; Morphological filtering; Restoration process; Swept source optical coherence tomographies; 3D printers | English | 2020 | 2020 | 10.1109/access.2020.3011136 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Authentication Protocols in Internet of Vehicles: Taxonomy, Analysis, and Challenges | Internet of Vehicles (IoV) is treated as an extension of Vehicle-to-Vehicle (V2V) communication network. IoV helps in enhancing driving aids with the help of vehicle Artificial Intelligence (AI) awareness of other vehicles and their actions. IoV is connected in an adhoc networking environment which utilizes each vehicle in the network as a node, called Vehicular Ad Hoc Network (VANET), where the vehicles may be also connected to the public Internet. It is specifically important for the autonomous vehicles because they can instantaneously communicate with other vehicles surrounding them. In addition, safely avoiding accident prone zones is crucial in order to continue secure and smart transportation. Since the communication among various entities involved in the IoV environment is via open channel, it gives an opportunity to a passive/active adversary to intercept, modify, delete or even insert fake information during communication. It is then a serious concern for the vehicles users to determine whether the received information is genuine. In this survey paper, various security aspects, threats and attacks, network and threat models related to the IoV environment are discussed. Next, a taxonomy of security protocols is given that is essential to provide IoV data security. In particular, focus on various authentication protocols is given that is needed for mutual authentication among the involved entities in the IoV environment for secure communication. A detailed comparative analysis among various state-of-art authentication protocols proposed in the related IoV environment is provided to show their effectiveness as well as security and functionality features. Moreover, some testbeds are described that were designed and implemented for the IoV environment. In addition, some future challenges for IoV security protocols are also highlighted that are necessary to address in the future. | Bagga, Palak; Das, Ashok Kumar; Wazid, Mohammad; Rodrigues, Joel J. P. C.; Park, Youngho | Int Inst Informat Technol Hyderabad, Ctr Secur Theory & Algorithm Res, Hyderabad 500032, India; Deemed Univ, Graph Era, Dept Comp Sci & Engn, Dehra Dun 248002, Uttarakhand, India; Fed Univ Piaui UFPI, PPGEE, BR-64049550 Teresina, Brazil; Inst Telecomunicacoes, P-1049001 Lisbon, Portugal; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | WAZID, MOHAMMAD/X-4211-2018; wazid, mohammad/X-4211-2018; Rodrigues, Joel/A-8103-2013; Das, Ashok Kumar/U-2790-2019 | 57211317635; 55450732800; 55480987400; 25930566300; 56962990300 | parkyh@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 6.27 | 2025-06-25 | 87 | 138 | Internet of Vehicles (IoV); vehicular adhoc networks (VANETs); authentication; batch verification; security | KEY ESTABLISHMENT SCHEME; SOCIAL INTERNET; LIGHTWEIGHT AUTHENTICATION; DUAL AUTHENTICATION; SECURITY PROTOCOLS; BLOCKCHAIN; MANAGEMENT; FUTURE; VERIFICATION; ARCHITECTURE | authentication; batch verification; Internet of Vehicles (IoV); security; vehicular adhoc networks (VANETs) | Authentication; Network security; Taxonomies; Vehicles; Vehicular ad hoc networks; Authentication protocols; Batch verification; Comparative analysis; Mutual authentication; security; Security protocols; Threats and attacks; Vehicular Adhoc Networks (VANETs); Vehicle to vehicle communications | English | 2020 | 2020 | 10.1109/access.2020.2981397 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | BAKMP-IoMT: Design of Blockchain Enabled Authenticated Key Management Protocol for Internet of Medical Things Deployment | The Internet of Medical Things (IoMT) is a kind of connected infrastructure of smart medical devices along with software applications, health systems and services. These medical devices and applications are connected to healthcare systems through the Internet. The Wi-Fi enabled devices facilitate machine-to-machine communication and link to the cloud platforms for data storage. IoMT has the ability to make accurate diagnoses, with fewer mistakes and lower costs of care. IoMT with smartphone applications permits the patients to exchange their health related confidential and private information to the healthcare experts (i.e., doctors) for the better control of diseases, and also for tracking and preventing chronic illnesses. Due to insecure communication among the entities involved in IoMT, an attacker can tamper with the confidential and private health related information for example an attacker can not only intercept the messages, but can also modify, delete or insert malicious messages during communication. To deal this sensitive issue, we design a novel blockchain enabled authentication key agreement protocol for IoMT environment, called BAKMP-IoMT. BAKMP-IoMT provides secure key management between implantable medical devices and personal servers and between personal servers and cloud servers. The legitimate users can also access the healthcare data from the cloud servers in a secure way. The entire healthcare data is stored in a blockchain maintained by the cloud servers. A detailed formal security including the security verification of BAKMP-IoMT using the widely-accepted Automated Validation of Internet Security Protocols and Applications (AVISPA) tool is performed to demonstrate its resilience against the different types of possible attack. The comparison of BAKMP-IoMT with relevant existing schemes is conducted which identifies that the proposed system furnishes better security and functionality, and also needs low communication and computational costs as compared to other schemes. Finally, the simulation of BAKMP-IoMT is conducted to demonstrate its impact on the performance parameters. | Garg, Neha; Wazid, Mohammad; Das, Ashok Kumar; Singh, Devesh Pratap; Rodrigues, Joel J. P. C.; Park, Youngho | Graph Era Deemed Univ, Dept Comp Sci & Engn, Dehra Dun 248002, Uttarakhand, India; Int Inst Informat Technol, Ctr Secur Theory & Algorithm Res, Hyderabad 500032, India; Fed Univ Piaui UFPI, PPGEE, BR-64049550 Teresina, Brazil; Inst Telecomunicacoes, P-1049001 Lisbon, Portugal; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | ; Das, Ashok Kumar/U-2790-2019; WAZID, MOHAMMAD/X-4211-2018; wazid, mohammad/X-4211-2018; Rodrigues, Joel/A-8103-2013; Tripathi, Neha/ABE-7449-2020; Singh, Devesh/KIC-3651-2024 | 58235667300; 55480987400; 55450732800; 55639324300; 25930566300; 56962990300 | parkyh@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 10.96 | 2025-06-25 | 127 | 200 | Medical services; Authentication; Internet; Computational modeling; Privacy; Blockchain; Internet of Medical Things (IoMT); authentication; key management; security; simulation | ACCESS-CONTROL SCHEME; 3-FACTOR USER AUTHENTICATION; AGREEMENT PROTOCOL; SECURE | authentication; Blockchain; Internet of Medical Things (IoMT); key management; security; simulation | Application programs; Blockchain; Cloud computing; Diagnosis; Digital storage; Disease control; Internet protocols; mHealth; Network security; Authentication key agreement protocols; Health related informations; Implantable medical devices; Key management protocols; Performance parameters; Security verification; Smart-phone applications; Software applications; Machine-to-machine communication | English | 2020 | 2020 | 10.1109/access.2020.2995917 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | CLUTCH: A Clustering-Driven Runtime Estimation Scheme for Scientific Simulations | Efficient scheduling among simultaneous simulation jobs is of critical importance in the allocation of limited computing and I/O resources. The difficulty of predicting when a job is completed can cause nontrivial problems for system administrators and users e.g., squandered resources, long waiting times, and simulation plan delays. To alleviate these problems, we propose a novel simulation runtime estimation scheme termed CLUTCH, which employs a well-orchestrated ensemble of clustering, classification, and regression techniques. The proposed scheme trains a runtime estimation model through a series of steps: (i) grouping past simulation provenance records by clustering, (ii) labeling each of the grouped records by classification, and (iii) performing regression on the execution times in each group. Given a simulation and its external arguments, the trained model predicts the simulation's runtime with high accuracy in a black box fashion, using only basic external arguments without needing extra information. We additionally propose two optimization algorithms which significantly reduce training overhead without sacrificing estimation quality. In the experiment with real datasets, our model achieved approximately a 14.2% growth in estimation accuracy, compared to the most recent state-of-the-art method; with our optimizations applied, the model was trained 16 times faster while still retaining accuracy. | Suh, Young-Kyoon; Kim, Seounghyeon; Kim, Jeeyoung | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea; Samsung Res, Seoul 06765, South Korea | 55443739900; 57218657561; 57204647175 | jeeyoungkim@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.33 | 2025-06-25 | 4 | 5 | Runtime; Estimation; Analytical models; Deep learning; Random forests; Predictive models; Data models; Simulation runtime estimation; ensemble machine learning; pre-processing; simulation provenance; clustering; classification; regression; random forest; K-means | OPTIMAL NUMBER | classification; clustering; ensemble machine learning; K-means; pre-processing; random forest; regression; simulation provenance; Simulation runtime estimation | Efficient scheduling; Estimation quality; Estimation schemes; External arguments; Optimization algorithms; Regression techniques; Scientific simulations; System administrators | English | 2020 | 2020 | 10.1109/access.2020.3042596 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Comments on "ITSSAKA-MS: An Improved Three-Factor Symmetric-Key Based Secure AKA Scheme for Multi-Server Environments" | Multi-server technology is widely utilized due to its enormous applicability in fields such as telecare medicine information system (TMIS), online shopping, remote surveillance, online banking, etc. However, a malicious attacker can perform various security attacks in the multi-server environments because he/she can easily modify, insert, inject, delete, and intercept exchanged messages over a public channel. Thus, secure authentication and key agreement (AKA) schemes are indispensable to provide useful services in multi-server environments. In 2020, Ali et al. presented a three-factor symmetric key based secure AKA scheme for privacy and security in multi-server environments. Ali et al. claimed that their scheme can prevent various security attacks, and also ensure secure authentication. However, this comment shows that Ali et al.'s scheme suffers from many drawbacks, including session key exposure, man-in-the-middle (MITM), and masquerade attacks. Moreover, their scheme fails to ensure mutual authentication. Thus, we suggest the necessary security guidelines to resolve the security threats of Ali et al.'s scheme. | Yu, Sungjin; Park, Youngho | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | 57203974524; 56962990300 | parkyh@knu.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.49 | 2025-06-25 | 7 | 8 | Cryptanalysis; multi-server environment; authentication; key establishment; security protocol | AUTHENTICATION PROTOCOL | authentication; Cryptanalysis; key establishment; multi-server environment; security protocol | Authentication; Network security; Security systems; Man in the middles (MITM); Masquerade attacks; Multi-server environment; Mutual authentication; Privacy and security; Remote surveillance; Secure authentications; Security threats; Cryptography | English | 2020 | 2020 | 10.1109/access.2020.3032959 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Comprehensive Analysis of Quantum Mechanical Effects of Interface Trap and Border Trap Densities of High-k Al2O3/In0.53Ga0.47As on a 300-mm Si Substrate | We investigated the effects of quantum confinement in determining the interface traps (Dit) and border traps (N-bt) of ALD deposited Al2O3 with temperature variations onto InxGa1-xAs on a 300-mm Si (001) substrate. We also analysed the impact of these effects on the total gate capacitance of high-k/Si and high-k/InxGa1-xAs structures using 1D Poisson-Schrodinger solver simulation tool (Nextnano). While quantum confinement has no or very little impact on the gate capacitance of high-k /Si structure, it has a considerably high amount of impact on the high-k/InxGa1-xAs structures and substantially lowers the total gate capacitance. To refiect the actual thickness between the insulator-semiconductor interface and charge centroid, capacitance-equivalent-thickness was used to refiect the effects of quantum confinement in the InxGa1-xAs layer. The Dit and Nbt values extracted using capacitance-equivalent-thickness were observed to be around 10% and 25%, respectively, higher than the values of extraction with equivalent-oxide-thickness. | Amir, Walid; Kim, Dae-Hyun; Kim, Tae-Woo | Univ Ulsan, Sch Elect Engn, Ulsan 44610, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 702701, South Korea | ; Kim, Yong/H-6157-2013; Kim, Dae-Hyun/AAA-4463-2020 | 57220184861; 57212363794; 57203495132 | dae-hyun.kim@ee.knu.ac.kr;twkim78@ulsan.ac.kr; | IEEE ACCESS | IEEE ACCESS | 2169-3536 | 8 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;ENGINEERING, ELECTRICAL & ELECTRONIC;TELECOMMUNICATIONS | 2020 | 3.367 | 34.3 | 0.49 | 2025-06-25 | 6 | 7 | Interface trap density; border trap density; quantum mechanical effect; high-k; III-V substrate | ELECTRICAL-PROPERTIES; SURFACE-STATES; MOS CAPACITORS; OXIDE TRAPS; AL2O3; DIELECTRICS | border trap density; high-k; III-V substrate; Interface trap density; quantum mechanical effect | Alumina; Aluminum oxide; Atomic layer deposition; Capacitance; III-V semiconductors; Quantum confinement; Semiconductor alloys; Substrates; Capacitance-equivalent thickness; Comprehensive analysis; Equivalent oxide thickness; Gate capacitance; Insulator-semiconductor interface; Quantum mechanical effects; Si (001) substrate; Temperature variation; Silicon | English | 2020 | 2020 | 10.1109/access.2020.3038856 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: