A new labdane-type diterpenoid from the leaves of Vitex negundo L.

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Sichaem J., Nguyen H.-H., Nguyen V.-H., Mac D.-H., Mai D.-T., Nguyen H.-C., Tran T.-N.-M., Pham N.-K.-T., Nguyen H.-H., Niamnont N., Duong T.-H.

ผู้เผยแพร่: International Astronautical Federation, IAF

ปีที่เผยแพร่ (ค.ศ.): 2019

นอก: 0074-1795

eISSN: 0074-1795

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079166628&partnerID=40&md5=d6543f5bb342813adeaffc7399bd74a1

ภาษา: English-Great Britain (EN-GB)

บทคัดย่อ

This paper presents a design and performance analysis of the passive microgravity sensor. The passive microgravity sensor is specially designed for non-electric supplied payload, which was launched in Mission 9 of New Shepard, Blue origin. Due to the weightlessness during microgravity, the general mass-spring systems with appropriate mass and spring constant are used to design the sensor and gain the benefit from weightlessness and non-electric. The movable lid of the passive microgravity sensor can be mechanically opened when the sensor is in microgravity condition, after which substances in the experiment chamber in the sensor will be released. All flight scenarios, including microgravity and hyper-gravity conditions, were analyzed to design the mechanism. There are two passive microgravity sensors installed into partition B and partition C of the payload. As a result, the pencil and graph paper recording of each passive microgravity sensors confirms the movement of the movable lid. The movable lid of the passive microgravity sensor in partition C moved upward around 13 millimeters. However, the movable lid of the passive microgravity sensor in partition B moved only five millimeters, which relatively lower than the sensor in partition C. As a consequence of the friction between pencil and paper recorder; it mainly affects the mechanism of the passive microgravity sensor. This caused the passive microgravity sensor in partition B to behave differently compared with a sensor in partition C. These results confirmed the performance of the mechanism of the passive microgravity sensor under the microgravity condition. Copyright ฉ 2019 by the International Astronautical Federation (IAF). All rights reserved.

คำสำคัญ

Mass-spring system, Microgravity science, New Shepard, Suborbital experiment