A5100694502- Network Security and Intrusion Detection
- Software-Defined Networks and 5G
- Internet Traffic Analysis and Secure E-voting
- Advanced Malware Detection Techniques
- Organic Light-Emitting Diodes Research
- Perovskite Materials and Applications
- Magnetic properties of thin films
- Security in Wireless Sensor Networks
- Advanced Vision and Imaging
- Sensorless Control of Electric Motors
- Mobile Ad Hoc Networks
- Cryptography and Data Security
- Smart Grid Security and Resilience
- Advanced Photonic Communication Systems
- Education and Learning Interventions
- Quantum Dots Synthesis And Properties
- Educational Systems and Policies
- Cloud Computing and Resource Management
- Anomaly Detection Techniques and Applications
- Video Coding and Compression Technologies
- Energy Efficient Wireless Sensor Networks
- Advanced MIMO Systems Optimization
- Multilevel Inverters and Converters
- Advanced Fiber Laser Technologies
- Optical Network Technologies
Seoul National University
2011-2025
Kyungpook National University
2008-2025
Soongsil University
2015-2024
Korea Advanced Institute of Science and Technology
2011-2023
Electronics and Telecommunications Research Institute
2023
Samsung (South Korea)
2011-2022
Convergence
2022
Seoul National University of Education
2022
Suwon Research Institute
2021
SK Group (South Korea)
2021
The uniform growth of single-crystal graphene over wafer-scale areas remains a challenge in the commercial-level manufacturability various electronic, photonic, mechanical, and other devices based on graphene. Here, we describe wrinkle-free monolayer silicon wafer using hydrogen-terminated germanium buffer layer. anisotropic twofold symmetry (110) surface allowed unidirectional alignment multiple seeds, which were merged to with predefined orientation. Furthermore, weak interaction between...
Abstract Graphene-based organic light-emitting diodes (OLEDs) have recently emerged as a key element essential in next-generation displays and lighting, mainly due to their promise for highly flexible light sources. However, efficiency has been, at best, similar that of conventional, indium tin oxide-based counterparts. We here propose an ideal electrode structure based on synergetic interplay high-index TiO 2 layers low-index hole-injection sandwiching graphene electrodes, which results...
Software-defined networking (SDN) is the key outcome of extensive research efforts over past few decades toward transforming Internet infrastructure to be more programmable, configurable, and manageable. However, critical cyber-threats in SDN-based cloud environment are rising rapidly, which distributed denial-of-service (DDoS) attack one most damaging cyber attacks. In this paper, we propose an efficient solution tackle DDoS attacks environment. We first introduce a new hybrid machine...
Metal halide perovskites (MHPs) have outstanding photophysical properties and are therefore being evaluated as next-generation light emitters. Within just a few years, the efficiencies of polycrystalline perovskite light-emitting diodes (PeLEDs) been drastically improved catching up with those conventional organic LEDs. The electroluminescence efficiency PeLEDs has limited by shortcomings such outcoupling efficiency, charge imbalance in MHP emitting layers, difficulty controlling surface...
Skin-attachable sensors, which represent the ultimate form of wearable electronic devices that ensure conformal contact with skin, suffer from motion artifact limitations owing to relative changes in position between sensor and skin during physical activities. In this study, a polarization-selective structure skin-conformable photoplethysmographic (PPG) was developed decrease amount scattered light epidermis, is main cause artifacts. The artifacts were suppressed more than 10-fold comparison...
Tin-based perovskites have emerged as lead-free alternatives, but their application in perovskite light-emitting diodes (PeLEDs) has been limited due to the low chemical stability and inhomogeneity of inorganic CsSnBr3 films using solution processing. Here, we demonstrate bright (∼160 cd m–2) PeLEDs made by introducing co-additives consisting SnF2 a grain-growth inhibitor (1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene). The use increased number nucleation sites during crystallization process...
Abstract Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in luminescence efficiency light-emitting diodes (LEDs). However, persistent gap between optical limit electroluminescence photoluminescence colloidal nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient achieve highly efficient PeNC-LEDs. Here, we present materials approach controlling dynamic nature surface. Our experimental...
In Software Defined Network, the controller is so vulnerable to flooding attack. By injecting spoofed request packets continuously, attackers make a burdensome process controller, cause bandwidth occupation in controller-switch channel, and overload flow table switch. The final target of downgrade or even shutdown stability quality service network. this paper, we introduce feasible method protect network against Distributed Denial Service attacks more effectively.
Different PIN-FORMED proteins (PINs) contribute to intercellular and intracellular auxin transport, depending on their distinctive subcellular localizations. Arabidopsis thaliana PINs with a long hydrophilic loop (HL) (PIN1 PIN4 PIN7; PINs) localize predominantly the plasma membrane (PM), whereas short (PIN5 PIN8) internal compartments. However, localization of has been observed mostly for ectopically expressed in different cell types, role HL PIN trafficking remains unclear. Here, we tested...
Flexible transparent electrode materials such as conducting polymers, silver nanowires, carbon nanotubes and graphenes are being investigated possible replacements for conventional brittle inorganic electrodes. However, they have critical drawbacks of low work function (WF), resulting in a high hole injection barrier to an overlying semiconducting layer simplified organic or organic–inorganic hybrid perovskite light-emitting diodes (OLEDs PeLEDs). Here, we report new anode material (AnoHIL)...
Abstract Organic–inorganic hybrid perovskites (OHPs) are promising emitters for light‐emitting diodes (LEDs) due to the high color purity, low cost, and simple synthesis. However, electroluminescent efficiency of polycrystalline OHP LEDs (PeLEDs) is often limited by poor surface morphology, small exciton binding energy, long diffusion length large‐grain films caused uncontrolled crystallization. Here, crystallization methylammonium lead bromide (MAPbBr 3 ) finely controlled using a polar...
With the proliferation of Internet, network complexities for both commercial and state organizations have significantly increased, leading to more sophisticated harder-to-detect attacks. This evolution poses substantial challenges intrusion detection systems, threatening cybersecurity national infrastructure alike. Although numerous deep learning techniques such as convolutional neural networks (CNNs), recurrent (RNNs), graph (GNNs) been applied detect various attacks, they face limitations...
In this paper, a novel strategy of current regulation field-orientation induction motor drive using the GTO inverter is proposed, which based on multivariable state feedback control with an integrator. The controller designed by pole placement technique system theory. addition, feedforward included in laws to improve transient responses. For linear control, rotor flux separated as disturbance and estimated reduced-order observer. A good steady-state performance obtained means integral...
An induction motor position control system based on the sliding mode is presented. In control, function discontinuous hyperplane, which causes harmful effects such as current harmonics and acoustic noise in drive application. A low-pass filter introduced between controller output input to reduce these effects. Although smooths alleviates vibration at final reference position, it may cause sluggish response transient condition. To overcome problem, a variable-bandwidth proposed. steady state,...
The Dzyaloshinskii–Moriya interaction (DMI) generates intriguing chiral magnetic objects, such as skyrmions and domain walls, that can be used building blocks in emerging nanodevices. Precise control of the DMI strength is one key issues for achieving better stability functionality these objects. In this paper, we report trilayer films, exhibits a noticeable correlation with work functions non-magnetic layers interfaced to layer. This intrinsic material parameters provides guideline...
In this paper, we firstly introduce a new combined approach to enhance the performance of classification in network traffic. The proposed combination mainly focuses on taking advantages two algorithms, Support Vector Machine (SVM), Self Organizing Map (SOM). We utilize both that SVM takes little time produce outputs with high accuracy, SOM makes reliable prediction based their neurons. Next, propose hybrid flow-based work mechanism, which applies SVMs-SOM, for handling Distributed...
Point-interactive image colorization aims to colorize grayscale images when a user provides the colors for specific locations. It is essential point-interactive methods appropriately propagate user-provided (i.e., hints) in entire obtain reasonably colorized with minimal effort. However, existing approaches often produce partially results due inefficient design of stacking convolutional layers hints distant relevant regions. To address this problem, we present iColoriT, novel Vision...
With the emergence of diverse group-based services, multiple multicast groups are likely to coexist in a single network, and users may subscribe simultaneously. However, existing group key management (GKM) schemes, aiming secure communication within group, not suitable environments because inefficient use keys, much larger rekeying overheads. In this paper, we propose new GKM scheme for groups, called master-key-encryption-based (MKE-MGKM) scheme. The MKE-MGKM exploits asymmetric i.e.,...
The use of flexible organic light-emitting diodes (OLEDs) for the next-generation displays and solid-state lightings has been considered, but widely used transparent conducting electrode (TCE), indium–tin-oxide (ITO), should be replaced by electrodes due to its brittleness increasing cost. Therefore, many kinds alternative TCEs have increasingly studied. In this paper, properties applications candidate classified into four categories (conducting polymer, silver nanowire, carbon nanotube...
The emerging fog computing technology is characterized by an ultralow latency response, which benefits a massive number of time-sensitive services and applications in the Internet things (IoT) era. To this end, infrastructure must minimize latencies for both service delivery execution phases. While transmission significantly depends on external factors (e.g., channel bandwidth, communication resources, interferences), computation can be considered as internal issue that could actively...
Cloud computing is now known as the most cost-effective platform for delivering big data and artificial intelligence services over Internet to enterprises cloud consumers. However, despite many recent security developments, consumers continue express great concern about using these platforms because they still have significant vulnerabilities. Typically, Economic Denial of Sustainability (EDoS) attacks exploit pay-as-you-go billing mechanisms used by service providers, so that a customer...
As network sizes grow, attack schemes not only become more varied but also increase in complexity. This diversification leads to a proliferation of variants, complicating the identification and differentiation potential threats. Enhancing system security necessitates implementation multi-class intrusion detection systems. approach enables categorization incoming traffic into distinct types illustrates specific encountered within Internet. Numerous studies have leveraged deep learning (DL)...