• Title/Summary/Keyword: Science and Technology Trends

Search Result 1,460, Processing Time 0.047 seconds

Research trends of MXenes as the Next-generation Two-dimensional Materials (차세대 2차원 소재, MXenes의 연구 동향)

  • Lee, Hojun;Yun, Yejun;Jang, Jinkwang;Byun, Jongmin
    • Journal of Powder Materials
    • /
    • v.28 no.2
    • /
    • pp.150-163
    • /
    • 2021
  • Interest in eco-friendly materials with high efficiencies is increasing significantly as science and technology undergo a paradigm shift toward environment-friendly and sustainable development. MXenes, a class of two-dimensional inorganic compounds, are generally defined as transition metal carbides or nitrides composed of few-atoms-thick layers with functional groups. Recently MXenes, because of their desirable electrical, thermal, and mechanical properties that emerge from conductive layered structures with tunable surface terminations, have garnered significant attention as promising candidates for energy storage applications (e.g., supercapacitors and electrode materials for Li-ion batteries), water purification, and gas sensors. In this review, we introduce MXenes and describe their properties and research trends by classifying them into two main categories: transition metal carbides and nitrides, including Ti-based MXenes, Mo-based MXenes, and Nb-based MXenes.

The Analysis of the Supercomputer Trends in Weather and Climate Research Areas (기상 및 기후 연구 분야의 슈퍼컴퓨터 보유 추이 분석)

  • Joh, Minsu;Park, Hyei-Sun
    • Atmosphere
    • /
    • v.15 no.2
    • /
    • pp.119-127
    • /
    • 2005
  • It is challenging work to predict weather and climate conditions of the future in advance. Since ENIAC was developed, weather and climate research areas have been taking advantage of the improvements in computer hardware. High performance computers allows researchers to build high quality models that allow them to make good predictions of what might happen in the future. Statistics on the high performance computers are one of the major interest to not only manufacturers but also the users such as weather and climate researchers. For this reason, the Top500 Supercomputer Sites Report has been being released twice a year since 1993 to provide a reliable basis for tracking and detecting trends in high performance computing. Using the Top500 Report, a short review on the supercomputer trends in weather and climate research areas is provided in this article.

Technology Trends in Space Optical Communications (우주 광통신 기술 동향)

  • C.I. Yeo;Y.S. Heo;S.W. Park;K.S. Kim;H.S. Kang
    • Electronics and Telecommunications Trends
    • /
    • v.38 no.2
    • /
    • pp.85-95
    • /
    • 2023
  • Space optical communication technology capable of large-capacity, high-speed, and low-latency communication can reduce the size, weight, and power consumption of radio frequency communications in existing satellite systems, thereby reducing launch costs, accommodating additional science instruments, and extending lifetime. Despite the high technical difficulty, various projects are being carried out in advanced countries regarding space technology for use in national security and defense, earth observation, and space communications. We review the advantages, key components, and development trends of space optical communication technology, which is attracting attention in applications such as satellite communications, intersatellite linking, and deep space communications.