• Title/Summary/Keyword: Development Progress

Search Result 2,900, Processing Time 0.038 seconds

Research Progress in Membrane and Catalyst for Highly Selective Chemiresistive Gas Sensors (저항변화식 가스센서 선택성 향상을 위한 멤브레인 및 촉매 연구동향)

  • Jang, Ji-Soo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.35 no.1
    • /
    • pp.11-17
    • /
    • 2022

  • Direct exposure to toxic and hazardous gases has always been considered as the most pervasive problem worldwide, leading to a gradual increase in the number of asthma patients due to NOx/SOx gases inhaling and exposure to 50 ppm formaldehyde gases. Therefore, the development of accurate gas sensors is a key issue for resolving these problems. To address such issues, the development of membranes for selective filtering of target molecules as well as nanocatalyst for enhancing the sensing selectivity is highly crucial. In this review, the research progress for porous membrane materials (e.g. MOFs, and graphene) and nanocatalyst technology for the development of selective and accurate gas sensors will be discussed.

  • https://doi.org/10.4313/JKEM.2022.35.1.2 인용 PDF KSCI

Development of Recliner Sensor for Car-Seat Using Wire Mechanism (와이어 기구를 이용한 자동차 시트 리크라이너 센서 개발)

  • Lee, Jeong-Wan;Jung, Won-Seok
    • Journal of Industrial Technology
    • /
    • v.28 no.A
    • /
    • pp.71-74
    • /
    • 2008

  • Belt Integrated Seat(BIS) has many advantages compared to the existing seats. Due to the development of materials and manufacturing technology, BIS, which has been used restrictely in the past, has gone through a rapid growth. As a result, its advantages have gained attention and the possibility of replacing the existing seats has grown. The need to develop BIS has risen and presently joint development with associated industries is in progress. For its first goal, the development and research of Recliner sensor has been selected. Recliner sensor is an essential part of the BIS in which the belt is incorporated onto the seat. In seat-belts, there is an inclination sensor which locks the belt according to the angle of a car. Because the inclination sensor can change frequently depending on the back of seat, a device which can enhance the inclination sensor according to the angle of the back of seat. It is the Recliner sensor that play's this role. Studies on Recliner sensor within and outside Korea has not yet made a salient progress, and due to this fact, the joint development has made a start by benchmarking other company's products. Currently, in other to set the course of the development, a research in patents and various other information is being done. In addition, for the purpose of developing a product which will be compatible with the existing products, a prototype will be made and tested before a new product makes its launching on the market.

  • PDF

Self-Assessment in Mathematics (수학교과에서의 자기평가)

  • 최승현
    • School Mathematics
    • /
    • v.1 no.1
    • /
    • pp.123-133
    • /
    • 1999

  • For an appropriate assessment in mathematics, students should play an active role in their learning by becoming aware of what they have learned in mathematics and by being able to assess their attainment of mathematical knowledge. The process of actively examining and monitoring students' own progress in learning and understanding of their mathematical knowledge, process, and attitude is called self-assessment, Researchers in mathematics education have found some important facts about the meta-cognitive process which is related to self-assessment : i. e. meta-cognition progress is composed of being aware of ones' own personal thinking of content knowledge and cognitive process(self-awareness) and engagement in self-evaluation. Tipical method for self-assessment in mathematics developed upon above finding about meta-cognitive progress is describing about students' knowledge and their problem solving strategies. In the beginning of the description in mathematics about themselves, students are required to answer which part they know and which part they don't know. Self-assessment of students' attitudes and dispositions can be just as important as assessment of their specific mathematical abilities. To make the self-assessment method a success, teachers should let students' have confidence and earn their cooperation by let them overcoming fear to be known the their ability to other students. In conclusion, self-assessment encourages students to assume an active role in development of mathematical power. For teachers, student self-assessment activities can provide a prism through which the development of students' mathematical power can be viewed.

  • PDF