• 스마트미디어저널
• /
• 제12권3호
• /
• pp.68-76
• /
• 2023

Emerging mobile edge computing (MEC) can be used in battery-constrained Internet of things (IoT). The execution latency of IoT applications can be improved by offloading computation-intensive tasks to an MEC server. Recently, the popularity of unmanned aerial vehicles (UAVs) has increased rapidly, and UAV-based MEC systems are receiving considerable attention. In this paper, we propose a dynamic computation offloading paradigm for UAV-based MEC systems, in which a UAV flies over an urban environment and provides edge services to IoT devices on the ground. Since most IoT devices are energy-constrained, we formulate our problem as a Markov decision process considering the energy level of the battery of each IoT device. We also use model-free Q-learning for time-critical tasks to maximize the system utility. According to our performance study, the proposed scheme can achieve desirable convergence properties and make intelligent offloading decisions.

• Applied Microscopy
• /
• 제51권
• /
• pp.7.1-7.9
• /
• 2021

Neuromorphic systems require integrated structures with high-density memory and selector devices to avoid interference and recognition errors between neighboring memory cells. To improve the performance of a selector device, it is important to understand the characteristics of the switching process. As changes by switching cycle occur at local nanoscale areas, a high-resolution analysis method is needed to investigate this phenomenon. Atomic force microscopy (AFM) is used to analyze the local changes because it offers nanoscale detection with high-resolution capabilities. This review introduces various types of AFM such as conductive AFM (C-AFM), electrostatic force microscopy (EFM), and Kelvin probe force microscopy (KPFM) to study switching behaviors.

• 한국콘텐츠학회논문지
• /
• 제16권6호
• /
• pp.123-134
• /
• 2016

웨어러블 디바이스는 사람과 사물, 그리고 공간이 연결된 사물인터넷 가상세계가 다가오면서 전 세계로부터 주목받고 있다. 하지만 웨어러블 디바이스 시장 활성화는 기대에 비해 다소 지연되고 있다. 웨어러블 디바이스의 확산을 위해서는 소비자에게 존재하는 저항을 완화시켜 소비자의 저항을 극복하는 노력이 필요하다. 본 연구에서는 웨어러블 디바이스 시장에서 가장 수요가 높은 손목형 웨어러블 디바이스에 초점을 맞추어, 혁신저항이 혁신특성과 소비자특성 변인을 매개하여 손목형 웨어러블 디바이스의 수용의도에 어떠한 영향을 미치는지 살펴보았다. 연구 결과, 소비자가 인지하는 손목형 웨어러블 디바이스의 혁신 특성 요인 중 상대적 이점, 개선된 혁신기대, 복잡성, 재정적 위험, 신체적 위험 등이 혁신저항에 유의한 영향을 미치는 것으로 나타났다. 또한, 소비자 특성요인 중 혁신성향과 기존 아날로그 시계 제품태도가 혁신저항에 유의한 영향을 미치고, 혁신저항이 혁신특성과 소비자특성을 매개하여 수용의도에 영향을 미치는 것으로 나타났다.

• 패션비즈니스
• /
• 제28권4호
• /
• pp.167-178
• /
• 2024

With the advent of the ICT era in the 4th Industrial Revolution era, cutting-edge industries in accordance with changing trends of the time, the MZ generation is leading a new consumer culture with a digital platform-based lifestyle. As such, wearable devices are leading popularization of the market, the need for product development and research that goes beyond simply combining high technology and combines user-centered functions and designs is emerging. Therefore, the purpose of this study was to analyze the functional mechanism of wearable devices according to consumption value of the MZ generation, focusing on wearable devices currently being commercialized in the digital transformation era, their characteristics were also derived. The research method for this purpose involved classifing wearable devices into notification, information, and content types according to their functional mechanisms and examing them. As a result of the research, characteristics of identity, collaboration, customization, and content were derived, I was is thought that they could interact with situational awareness to suit the situation and purpose. They are closely related. They could make social responsibility and sustainable efforts beyond the brand's image and profit pursuit. As the consumption value of the MZ generation, a new consumer class, is highlighted, it is essential to segmenting and analyzing user-centered functions and content, not simply combining cutting-edge technologies this study is significant in that it provides essential data for continuous development of wearable devices and the establishment of successful marketing strategies.

• JSTS:Journal of Semiconductor Technology and Science
• /
• 제16권2호
• /
• pp.159-165
• /
• 2016

Recently, active efforts are being made for future Si CMOS technology by various researches on emerging devices and materials. Capability of low power consumption becomes increasingly important criterion for advanced logic devices in extending the Si CMOS. In this work, a junctionless field-effect transistor (JLFET) with ultra-thin poly-Si (UTP) channel is designed aiming the sub-10-nm technology for low-power (LP) applications. A comparative study by device simulations has been performed for the devices with crystalline and polycrystalline Si channels, respectively, in order to demonstrate that the difference in their performances becomes smaller and eventually disappears as the 10-nm regime is reached. The UTP JLFET would be one of the strongest candidates for advanced logic technology, with various virtues of high-speed operation, low power consumption, and low-thermal-budget process integration.

• 세라미스트
• /
• 제22권4호
• /
• pp.332-349
• /
• 2019

Ceramic thin films are key materials for fundamental electronic devices such as transistors and capacitors which are highly important for the state-of-the-art electronic products. Their characteristic dielectric properties enable accurate control of current conduction through channel of transistors and stored charges in capacitor electrodes. The electronic conduction in ceramic thin films is one of the most important part to understand the electrical properties of electronic device based on ceramic thin films. There have been numerous papers dealing with the electronic conduction mechanisms in emerging ceramic thin films for future electronic devices, but these studies have been rarely reviewed. Another interesting electrical characterization technique is one based on electrical pulses and following transient responses, which can be used to examine physical and chemical changes in ceramic thin films. In this review, studies on various conduction mechanisms through ceramic thin films and electrical characterization based on electric pulses are comprehensively reviewed.

• 한국정보시스템학회지:정보시스템연구
• /
• 제21권4호
• /
• pp.81-108
• /
• 2012

Growth in the device field is driven by various emerging devices, tablet PC are among the most recognizable. Tablet PC are mobile computing devices enabled with touch screens or pen inputs and provide the functions of various other devices. Firms are interested in utilization of tablet PC on task. Many of firms is considering accepting of tablet PC and is looking forward to performance of tablet PC. Thus, this study propose to discuss strategies for the usage of tablet PC from organizational needs perspective. The goal of this study is to identify factors influencing use of tablet PC and task performance. The results of this study showed that the proposed factors of organizational needs with a exception of Service Flexibility had a positive impact on perceived usefulness that then positively affected Usage of Tablet PC and Task Performance. In addition, perceived task-technology fit had a positive impact on perceived usefulness and Usage of Tablet PC. Finally, Innovative Culture of Organization as a moderating effect significantly influenced the relationship between perceived usefulness, perceived Task-Technology Fit and Usage of Tablet PC. This study is expected to be a reference for a subsequent study associated with Tablet PC at organizational viewpoints.

• 대한임베디드공학회논문지
• /
• 제17권1호
• /
• pp.19-24
• /
• 2022

Through the development and dissemination of embedded devices, studies that may help patients are rapidly emerging. Recently, as wearable devices have become one of the ways to diagnose diseases in daily life, they are being studied as a way to assist severely ill patients to lead their daily lives. Among them, a method of detecting and giving signals to detect and solve symptoms using acceleration sensors to diagnose Parkinson's disease is being studied, and there is no study to measure and analyze various factors that can affect Parkinson's disease. To solve them, we designed and developed a wearable device, P-Band, with various sensors capable of diagnosing related symptoms, including acceleration sensors capable of diagnosing Parkinson's disease. In this paper, the overall structure of the P-Band and the description and operation method of the measurable sensors are presented. In addition, it was confirmed that the symptoms of Parkinson's patients could be determined complexly through the results measured in actual patients.

• International Journal of Internet, Broadcasting and Communication
• /
• 제14권1호
• /
• pp.25-30
• /
• 2022

Since Tim Berners-Lee introduced the idea of the web to the world in the late 1980s, the way information is produced, accessed and used has been constantly changing. This was once again an era of upheaval after Apple's Steve Jobs introduced the smartphone to the world in the mid-2000s. Before the advent of smart devices, web browsing was mainly done using desktops. After the advent of this device, the era of solving almost all human needs with a small PC in the palm of your hand has arrived. The necessity of seamless connectivity between devices, which are constantly emerging and evolving, asks our attention more than ever. In this study, we will discuss a case of design and development of a national open access website, which is optimized for dynamic online user behaviors with diverse devices. Our goal is to provide one true web for people to use in their environment. Device makers need to provide products identical to the desktop environment as much as possible. Service providers should also provide services optimized for each device in hyper-connected environments. Providing a web, optimized for user's online context, will eventually result in a sustainable user experience.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
• /
• pp.55-55
• /
• 2015

Today, engineers are facing new set of challenges that are quite different from the conventional ones. Information technologies are rapidly commoditizing while the paths beyond the current roadmaps became uncertain as various technologies have been pushed to their limits. Along with these changes in IT ecosystems, grand challenges such as global security, health, sustainability, and energy increasingly require trans-disciplinary solutions that go beyond the traditional arenas in STEM (Science, Technology, Engineering and Mathematics). Addressing these needs is shifting engineering education and research to a new paradigm where the emphasis is placed on the consilience for holistic and system level understanding and the convergence of technology with AHSD (arts, humanities, social science, and design). At the center of this evolutionary convergence, nanotechnologies are enabling novel functionalities such as bio-compatibility, flexibility, low power, and sustainability while on a mission to meet scalability and low cost for smart electronics, u-health, sensing networks, and self-sustainable energy systems. This talk introduces the efforts of convergence based on the emerging nano technology tool sets in the newly launched School of Integrated Technology and the Yonsei Institute of Convergence Technology at Yonsei International Campus. While the conventional devices have largely depended upon the inherent material properties, the newer devices are enabled by nanoscale dimensions and structures in increasingly standardized and scalable fabrication platform. Localized surface plasmon resonance in 0 dimensional nano particles and structures leads to subwavelength confinement and enhanced near-field interactions enabling novel field of metal photonics for sensing and integrated photonic applications [1,2]. Unique properties offered by 1 dimensional nanowires and 2 dimensional materials and structures can enable novel electronic, photonic, nano-bio, and biomimetic applications [3-5]. These novel functionalities offered by the emerging nanotechnologies are continuously finding pathways to be part of smart systems to improve the overall quality of life.