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Accelerometry Measurements of Sprint Kayaks
Michael G. Robinson,Laurence E. Holt,Thomas W. Pelham,Karen Furneaux 한국코칭능력개발원 2011 International Journal of Coaching Science Vol.5 No.1
In flatwater paddling competition, optimal physiological power, effective technique and the correct race strategy are essential for peak performance. However, other important factors are the matching of equipment with athlete and placement order in crews. In this study, an in-board accelerometer measured craft dynamics of the sprint racing K-1 and K-4 with various combinations of international class paddlers. Acceleration values were greater on the right when compared to the left for the K-1 paddler. In the K-4 trails, crew 3 demonstrated greater accelerations, achieved faster times over the measured distance with the fewest number of strokes when compared with crews 1 and 2. Acceleration data sets were consistent with personal observations and video analysis conducted by Olympic coaches. This study clearly demonstrated that acceleration data sets can augment the analysis of performance, match equipment with athlete, identify stroke technique faults, and in the crew selection process.
Michael R. Robinson 한국국방연구원 2006 국방정책연구 Vol.22 No.3
As the Internet has exponentially increased the power of individual computers through its world wide web of links-the military, homeland security and border control authorities have come to understand the vastly superior results that can be achieved by networking their assets. For the military and homeland security users, this networking of systems falls under the concept of network-centric operations. Compared to the Internet, complex though it is, developing Network-Centric Operations (NCO) is a vastly more ambitious undertaking. For example, the vast majority of the world's computers use a handful of operating systems and computers are upgraded and replaced so regularly that the standards of the Internet have been incorporated almost universally. For NCO, the users face a wide range of communications systems, proprietary operating systems, and much longer cycle-times for upgrades that most computers. They also must confront decades-long life cycles for the platforms they use. Still, the benefits of NCO are potentially enormous and the task is well understood. This paper presents an overview of the concept of NCO, its components and how it has the capacity to fundamentally change military, homeland security, border control and other security operations. 인터넷이 전세계에 거미줄처럼 엮여있는 링크를 통해 개인 컴퓨터의 능력을 기하급수적으로 향상시켰듯이, 군 당국, 국토안보부, 국경수비당국은 각각의 자산을 네트워크로 연결시킬 경우 얼마나 뛰어난 성과를 거둘 수 있는지 깨닫게 되었다. 군 관련, 안보관련 사용자에게 있어서 시스템을 네트워크화한다고 하면 네트워크 중심의 운영의 개념에 대한 적절한 표현일 것이다. 복잡한 인터넷과 비교해 볼 때, NCO 개발은 훨씬 야심찬 과업이다. 예를 들어 세계의 컴퓨터 대부분이 몇 개 안 되는 운영체계를 사용하며, 너무나도 정기적으로 업그레이드되고 교체되어 인터넷의 기준은 거의 전세계적으로 통합되었다. NCO 사용자는 다양한 커뮤니케이션 시스템, 독점적(proprietary) 운영체계, 그리고 대부분의 컴퓨터보다 훨씬 긴 업그레이드 사이클타임에 직면해 있다. 또한 사용하는 플랫폼이 수십 년의 생명주기를 가지고 있다는 사실에 직면해 있다. 하지만, NCO의 효용은 매우 큰 영향을 미칠 것이며, 무엇을 해야 하는지 잘 알고 있다. 본 연구는 NCO의 개념에 대한 개요를 제공하고, NCO는 무엇으로 구성되어 있는지, 과연 어떻게 NCO가 군사, 국토안보, 국경수비 및 기타 보안운영을 그 기초부터 바꾸어 놓을 수 있는지 설명하고 있다.
LOST TIME: WHEN GIANTS ROAMED THE EARTH
Michael Rowan-Robinson 한국천문학회 2017 天文學論叢 Vol.32 No.1
Some after-dinner thoughts on the giants of infrared space astronomy. I here describe important events in infrared astronomy starting from 1964 when I started working on my PhD. Here I describe how I became involved in IRAS, Infrared Space Observatrory (ISO), Herschel , Spitzer and AKARI, together with important events that led to these great missions.
FAR INFRARED AND SUBMILLIMETRE SURVEYS: FROM IRAS TO AKARI, HERSCHEL AND PLANCK
Michael Rowan-Robinson,Lingyu Wang 한국천문학회 2017 天文學論叢 Vol.32 No.1
We discuss a new IRAS Faint Source Catalog galaxy redshift catalogue (RIFSCz) whichincorporates data from Galex, SDSS, 2MASS, WISE, AKARI and Planck. AKARI fluxes are consistent with photometry from other far infrared andsubmillimetre missions provided an aperture correction is applied. Results from the Hermes-SWIRE survey in Lockman are also discussedbriefly, and the strong contrast between the galaxy populations selected at60 and 500 μm is summarized.
ShadowCam Instrument and Investigation Overview
Mark Southwick Robinson,Scott Michael Brylow,Michael Alan Caplinger,Lynn Marie Carter,Matthew John Clark,Brett Wilcox Denevi,Nicholas Michael Estes,David Carl Humm,Prasun Mahanti,Douglas Arden Peckham 한국우주과학회 2023 Journal of Astronomy and Space Sciences Vol.40 No.4
ShadowCam is a National Aeronautics and Space Administration Advanced Exploration Systems funded instrument hosted onboard the Korea Aerospace Research Institute (KARI) Korea Pathfinder Lunar Orbiter (KPLO) satellite. By collecting high-resolution images of permanently shadowed regions (PSRs), ShadowCam will provide critical information about the distribution and accessibility of water ice and other volatiles at spatial scales (1.7 m/pixel) required to mitigate risks and maximize the results of future exploration activities. The PSRs never see direct sunlight and are illuminated only by light reflected from nearby topographic highs. Since secondary illumination is very dim, ShadowCam was designed to be over 200 times more sensitive than previous imagers like the Lunar Reconnaissance Orbiter Camera Narrow Angle Camera (LROC NAC). ShadowCam images thus allow for unprecedented views into the shadows, but saturate while imaging sunlit terrain.
Prasun Mahanti,Mark Southwick Robinson,David Carl Humm,Robert Vernon Wagner,Nicholas Michael Estes,Jean-Pierre Williams 한국우주과학회 2023 Journal of Astronomy and Space Sciences Vol.40 No.4
Lunar permanently shadowed regions (PSRs) never see direct sunlight and are illuminated only by secondary illumination - light reflected from nearby topography. The ShadowCam imaging experiment onboard the Korea Pathfinder Lunar Orbiter is acquiring images of these PSRs. We characterize and discuss the nature of secondary illumination for the Shackleton PSR from ShadowCam radiance-calibrated images. We also use modeling to understand the magnitude and direction of the secondary illumination. Results from our analysis highlight the non-homogeneous, dynamic, and complex nature of PSR secondary lighting. Knowledge of the direction of the secondary illumination is crucial for reli-able interpretation of contrasts observed in ShadowCam images. This preliminary analysis of the floor of Shackleton crater from images acquired over multiple secondary illumination conditions does not reveal indications of exposed surface ice, even though temperatures are constantly below 110K.
Modeling and Design of Common Mode and Differential Mode Filter for PWM Converters
Gopal Mondal,Jonathan Robinson,Michael Finkenzeller 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper presents a method to model a backto-back converter and the additional passive filter system. The mathematical modeling method followed the step of converting the three-phase system to single phase systems by separating the differential mode (DM) and common mode (CM) noise circuit for the design of the filter components separately. The model accounts for parasitic components in the converters and presents an indirect method of estimating parasitic capacitance for CM filter design. Design rules for the different components are summarized. Results from a lab prototype are presented and show good correspondence to the model.
David Carl Humm,Mallory Janet Kinczyk,Scott Michael Brylow,Robert Vernon Wagner,Emerson Jacob Speyerer,Nicholas Michael Estes,Prasun Mahanti,Aaron Kyle Boyd,Mark Southwick Robinson 한국우주과학회 2023 Journal of Astronomy and Space Sciences Vol.40 No.4
ShadowCam is a high-sensitivity, high-resolution imager provided by NASA for the Danuri (KPLO) lunar mission. ShadowCam calibration shows that it is well suited for its purpose, to image permanently shadowed regions (PSRs) that occur near the lunar poles. It is 205 times as sensitive as the Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC). The signal to noise ratio (SNR) is greater than 100 over a large part of the dynamic range, and the top of the dynamic range is high enough to accommodate most brighter PSR pixels. The optical performance is good enough to take full advantage of the 1.7 meter/pixel image scale, and calibrated images have uniform response. We describe some instrument artifacts that are amenable to future corrections, making it possible to improve performance further. Stray light control is very challenging for this mission. In many cases, ShadowCam can image shadowed areas with directly illuminated terrain in or near the field of view (FOV). We include thorough qualitative descriptions of circumstances under which lunar brightness levels far higher than the top of the dynamic range cause detector or stray light artifacts and the size and extent of the artifact signal under those circumstances.