344,982 research outputs found
Development of airborne hemispheric spectrometer
No full textA new concept of hyperspectral instrument is presented. Novel design of hyperspectral skydome allows retrieval of atmospheric constituents and properties from a snapshot of spectral solar radiation over entire sky, regardless of platform motion either on ground or aircraft. Design and description of subsystems of the instrument are given followed by preliminary tolerance analysis, whose results are to be added in the retrieval algorithm along with hardware specifications. Extended application of the hyperspectral skydome is being carried out filling in the gap in the imaging spectrometry
Allium dumebuchum H. J. Choi 2021
No full textAllium dumebuchum H.J. Choi (2021: 8) Isotype: KOREA, Gyeongsangbuk-do: Ulleung-gun, Namyang, 8 October 2020, H. J. Choi 201008-001 (NIBRVP815478; Fig. 1 -31). Paratypes: KOREA, Gyeongsangbuk-do: Ulleung-gun, 3 September 2008, S. T . Kim & S. K. So SK2008-019 - 096 (NIBRVP205843); Ulleung-gun, 15 October 2009, S. H . Kim ksh84 (NIBRVP246241); Ulleung-gun, Gallyeong, 23 August 2005, H . Kim KH1283 (NIBRVP203887), H . Kim & M. J. Song 1073 (3 sheets, NIBRVP182436), H . Kim, M. J. Song & D. H. Shin 1406 (NIBRVP732384); Hyeonpo, 4 October 2011, J. H . Park & K. H. Kim 19-1 (2 sheets, NIBRVP380193); Nari Basin, 25 September 2001, J. S . Kim s.n. (NIBRVP307168); Sadong-ri, 12 October 2005, J. O . Hyun, J. D. Kim & M. A. Jung NAPI-20101161 (2 sheets, NIBRVP294032). Note: The holotype is preserved in KH, and other isotypes are deposited in the herbaria of Changwon National University, KH, and KIOM.Published as part of Jang, Hyun-Do, Hyun, Chang-Woo, Ryu, Seah & Lee, Sang-Jun, 2022, Type specimens of vascular plants in the herbarium of the National Institute of Biological Resources (II), pp. 229-243 in Phytotaxa 539 (3) on page 239, DOI: 10.11646/phytotaxa.539.3.2, http://zenodo.org/record/636408
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
A generalized method to optimize acoustic intensity field by using source array
No full textAcoustically bright zone is defined as a zone where the listener can acquire better sound quality than others. The acoustically bright zone can be generated by improving a desired acoustic variable on a selected zone, and the `zone control’ can be done by controlling multiple sources. Among many possible definitions on the acoustic variables, acoustic intensity is tried as an objective function to enhance the sound power radiation into the listening area. In previous work, acoustic intensity projected to a direction is considered as object function[J.-W. Choi and Y. –H. Kim, “Acoustic intensity optimization using source array,” in Proc. Inter-noise 2003, N777], so that one can maximize acoustic intensity component propagates to the desired direction. This approach shows that acoustic intensity field can be manipulated into a desired direction using a small number of sources, but it sometimes fails to control the direction of intensity. Extending this work, this paper presents a generalized method that can also manipulate the propagating direction of wave front. By employing normalized transfer functions between the multiple sources and measurement points during the optimization process, the directional characteristics of intensity field can be improved
- …
