標(biāo)題: Titlebook: Instrumentation for Ground-Based Optical Astronomy; Present and Future T Lloyd B. Robinson Conference proceedings 1988 Springer-Verlag New [打印本頁(yè)] 作者: 水平 時(shí)間: 2025-3-21 18:07
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作者: Conduit 時(shí)間: 2025-3-22 00:02 作者: accrete 時(shí)間: 2025-3-22 03:30
Steven S. Vogt,Daniel J. SchroederSOs which assist members to interact in a manner that is bene?cial in different ways – politically, socially, economically – and so on. CSOs might generally be categorized as formal or informal, or as organized or more loosely organized. The former would include such organizations as labour unions, 作者: 曲解 時(shí)間: 2025-3-22 07:44 作者: 苦惱 時(shí)間: 2025-3-22 09:40 作者: 同步信息 時(shí)間: 2025-3-22 16:10 作者: 信徒 時(shí)間: 2025-3-22 20:16 作者: oracle 時(shí)間: 2025-3-22 23:33 作者: lambaste 時(shí)間: 2025-3-23 03:58
Phillip J. MacQueen,Robert G. Tullhe tyrosine kinase activity associated with the . gene product. appears to play a key role in oncogenesis, the exact mechanism by which this is accomplished remains elusive. Because a general discussion of the origin and biology of A-MuLV has been presented recently,. this review will focus on recen作者: 磨坊 時(shí)間: 2025-3-23 06:21 作者: Definitive 時(shí)間: 2025-3-23 10:34 作者: 魯莽 時(shí)間: 2025-3-23 13:53 作者: Cpap155 時(shí)間: 2025-3-23 20:32
Paul Athertonhe lateral division of the ventral horn at stage 20. At this stage of development the ventral funiculus may contain descending axons from the brain stem passing via the flm. Most of its other fibers are probably ascending, however (Rhines and Windle 1941). Interneurons with ascending projections sen作者: 跑過(guò) 時(shí)間: 2025-3-23 22:49
Peter Gillinghamatter at HH28 (E6). Dorsal root fibers extend into the vicinity of motoneuron dendrites by HH32 (E7.5), i.e., about the time that reflexes can first be elicited. Dense projections to the dorsal layers of the lumbosacral spinal cord, presumably from cutaneous afferent fibers, appear at about HH39 (E1作者: discord 時(shí)間: 2025-3-24 04:04
develop differently yet display some common features. In addition, laboratory work quickly reveals that even the best model organism exhibits, in addition to its particular advantages, specific disadvantages. Thus the zebrafish has transparent embryos but large-scale genetic studies require hundred作者: 共同生活 時(shí)間: 2025-3-24 07:10
J. S. Millered to be insufficient. It was in this backdrop that the government invited private participation in the public domain of social infrastructure. The financial as well as circumstantial rationale extended to justify such a change in paradigm in India has basically hinged on three crucial premises: (i)作者: Critical 時(shí)間: 2025-3-24 12:26
J. S. Miller,L. B. Robinson,R. W. Goodrichion decreases with high growth. Moreover, that higher income inequality reduces the poverty impact of growth is also well-documented. So inequality enhancing high growth not only may lead to adverse poverty impacts, but also has the potential to reduce the poverty impact of future growth.作者: 舔食 時(shí)間: 2025-3-24 18:26 作者: ACTIN 時(shí)間: 2025-3-24 19:00
E. Harvey Richardson,Christopher L. Morbeyormation and second, moving forward, offer some key policy prescriptions for Africa drawn from . .. Ultimately, Africans are responsible for their development and growth path and it is within the grasp of African nations to transform themselves into an upper middle-income status.作者: Accolade 時(shí)間: 2025-3-25 02:32 作者: inspired 時(shí)間: 2025-3-25 07:22
Instrumentation for Ground-Based Optical AstronomyPresent and Future T作者: nitroglycerin 時(shí)間: 2025-3-25 08:31
Instrumentation for Ground-Based Optical Astronomy978-1-4612-3880-5作者: 鞠躬 時(shí)間: 2025-3-25 11:52
Conference proceedings 1988 effect. On the contrary, the new instruments and ideas for new instruments described in this book make it clear that the rate of progress has not diminished, and that this subject is still as exciting and productive as ever. Instrumentation for Ground-Based Optical Astronomy was chosen as the theme作者: osculate 時(shí)間: 2025-3-25 17:44 作者: motivate 時(shí)間: 2025-3-25 23:03 作者: 袖章 時(shí)間: 2025-3-26 01:06
A Comparison of Holographic and Echelle Gratings in Astronomical Spectrometrygraph over parts of the spectral range. In regions where high-transmittance filters were available the echelle beat the holographic grating by factors up to 2.2 at the peaks of the echelle’s blaze profile. The holographic grating’s efficiency does not compete favorably with that of the echelle when 作者: correspondent 時(shí)間: 2025-3-26 06:14
What’s New in Gratings?y due to the resurrection of concave grating mounts. These had enjoyed a poor reputation in this field because of inherent imaging aberrations, which could now be sufficiently compensated for through holographic tricks. For ground-based astronomical instruments, however, there seems little advantage作者: 強(qiáng)行引入 時(shí)間: 2025-3-26 10:42 作者: 處理 時(shí)間: 2025-3-26 15:40
Aspects of the Optical Design of the AAT and WHT Echelle Spectrographsschel telescopes (the AAT and the WHT). The results have produced peculiar characteristics not seen before in this type of instrument. For example, a variable collimated beam was adopted and an image slicer is being implemented in the normal observing mode. The cross disperser and the procedure for 作者: expound 時(shí)間: 2025-3-26 20:52 作者: 問(wèn)到了燒瓶 時(shí)間: 2025-3-26 21:07
The Lick Observatory Hamilton Echelle Spectrometerse with large format CCDs. It was designed primarily for high resolution (R=50,000) wide bandpass spectroscopy of point-like sources down to a limiting magnitude of about V=16.5, over the 0.34 μm to 1.1 μm spectral region. Its design features a relatively large collimated beam size, the use of prism作者: nascent 時(shí)間: 2025-3-27 01:40 作者: Aspiration 時(shí)間: 2025-3-27 08:29
A Coudé Echelle Spectrograph with a Large Mosaic Grating but with Small Corrector Lensespping orders with a filter or a small grism but is not suitable for the stacking of many orders. It is not a survey instrument. The camera mirror is made paraboloidal to avoid the need for large refractive correctors such as a Schmidt plate or a Maksutov lens. Instead, a small triplet lens is locate作者: 爭(zhēng)吵 時(shí)間: 2025-3-27 10:14
A New High-Resolution CCD Spectrometer for the McDonald Observatory 2.7-Meter Telescopeh that we propose to build for the McDonald Observatory 2.7-m telescope. It will have a luminosity-resolving-power product equal to or exceeding that of any other high-resolving-power spectrograph in the world. The general configuration of this spectrograph will be given, as will the reasoning behin作者: 旁觀(guān)者 時(shí)間: 2025-3-27 16:36
HIRES: A High Resolution Echelle Spectrometer for the Keck 10-Meter Telescopee Nasmyth focus. The beam size will be 12″, and the echelle will be a 1x3 mosaic of newly-mastered 46.5 gr/mm 12″ xl6″ R-2.6 echelles, yielding a (resolution × slit width) product of R S = 39000″. Eventually, up to 7 different cross-dispersers will be available, though only a few will be available a作者: 殘忍 時(shí)間: 2025-3-27 19:54
A Comparison of Holographic and Echelle Gratings in Astronomical Spectrometryé spectrograph of the 2.7-m telescope at McDonald Observatory under conditions typical of high-resolution astronomical spectroscopy. Spectra of a current-stabilized quartz-iodine incandescent lamp were obtained with both gratings in the wavelength range 5900–6800 ? using a Reticon array as detector.作者: 游行 時(shí)間: 2025-3-27 22:25
What’s New in Gratings?ratings during the last decade. Both turn out to be realizations of long-held dreams. One is the accurate solution of Maxwell’s equations for diffraction gratings, so that diffraction efficiency can be theoretically predicted for any groove geometry, wavelength, material and angle of incidence. [1] 作者: 地牢 時(shí)間: 2025-3-28 05:24 作者: ABOUT 時(shí)間: 2025-3-28 08:07
An Ultra-High Resolution Spectrograph in a Hurrytions which are normally impossible. To take full advantage of a 4 metre aperture and a 4th magnitude star (later brighter than 3rd), one obvious application was to very high spectral resolution. The Anglo-Australian Observatory had under construction a coude spectrograph, for which two large echell作者: 有權(quán) 時(shí)間: 2025-3-28 10:51 作者: 巨大沒(méi)有 時(shí)間: 2025-3-28 18:24 作者: refraction 時(shí)間: 2025-3-28 22:10 作者: Amorous 時(shí)間: 2025-3-29 00:36 作者: 鉆孔 時(shí)間: 2025-3-29 03:57
ortico-cortical and descending cortical efferent connections. Previous evidence suggests that the critical subplate neurons are early-born “pioneer” neurons, which extend the first axons out of the cortex to subcortical forebrain regions. However, pioneer neurons are not the only type of neuron in t作者: 鋸齒狀 時(shí)間: 2025-3-29 07:22
tive, one might argue that FBOs have long pre-dated other civil society organizations (CSOs) in that they either appeared with the evangelization of African societies in the nineteenth century or the Islamization of the East Coast of the continent much earlier. Civil society, of course, can be de?ne作者: vocation 時(shí)間: 2025-3-29 11:33 作者: Forsake 時(shí)間: 2025-3-29 16:50 作者: 贊成你 時(shí)間: 2025-3-29 22:17
David D. Walkerinting at the ongoing in?uence or even resurgence of religion in modern societies. Increasingly, it is being acknowledged that religion is central to the lives of people and that religion cannot be separated from the political and the economic. This correlates with the increasing interest in the pot作者: MIME 時(shí)間: 2025-3-30 00:58 作者: MORT 時(shí)間: 2025-3-30 04:26
Daniel J. Schroederal challenges are conceptualized at the corporate level by the concept of Corporate Social Responsibility (CSR). At the level of the mining industries, the expectations are much more important especially since the mining activity generates social impacts (creation of employment, but also prostitutio作者: Cocker 時(shí)間: 2025-3-30 08:12 作者: 大吃大喝 時(shí)間: 2025-3-30 13:48 作者: Terrace 時(shí)間: 2025-3-30 20:05
Steven S. Vogt,G. Donald Penrodmensional genetic code specify a three-dimensional animal? The complexity of this issue is not simply one of gross anatomy, as can be appreciated by considering how the nervous system makes its myriad of microscopic connections to provide the basis for precise perceptual behaviour. The complexity an作者: APEX 時(shí)間: 2025-3-31 00:12
Robert G. Tullng the goldfish (Agranoff ., 1967). With this perspective, goldfish were trained to perform various tasks in experimental paradigms, and changes in the RNA synthesis (Shashoua, 1968) as well as the protein pattern (Shashoua, 1976) were reported in the brain after learning. Subsequently, two proteins作者: 毗鄰 時(shí)間: 2025-3-31 04:19
Erwin G. Loewenitzgerald (1937) noted that motoneurons are the first neurons to develop (Fig. 42). They appear in the uppermost spinal segments at approximately E27 (about Carnegie stage 13/14). At this time of development also dorsal root ganglion cells are present. Central processes of the bipolar ganglion cells作者: 迫擊炮 時(shí)間: 2025-3-31 07:27
Paul Athertonitzgerald (1937) noted that motoneurons are the first neurons to develop (Fig. 42). They appear in the uppermost spinal segments at approximately E27 (about Carnegie stage 13/14). At this time of development also dorsal root ganglion cells are present. Central processes of the bipolar ganglion cells作者: 提名 時(shí)間: 2025-3-31 12:57
Peter Gillinghamrvical cord, spinal motoneurons are first born at about 28 h of development comparable to Hamburger and Hamilton’s (HH) stage 8, those in the brachial cord around 52 h (stage HH15), and those in the lumbar cord around 56 h or stage HH17 (McConnell and Sechrist 1980). Motor projections from cervical,作者: gospel 時(shí)間: 2025-3-31 14:57
h on a few reference or “model” organisms such as . or maize. Recent developmental biology has depended on a small number of organisms for much of its spectacular progress. This concentration of effort facilitates attempts to advance in the analysis of the basic processes down to the molecular level作者: Expiration 時(shí)間: 2025-3-31 19:30 作者: 確定無(wú)疑 時(shí)間: 2025-3-31 21:39
J. S. Miller,L. B. Robinson,R. W. Goodrich policy and research documents from various institutions, ministries, individual researchers are abound with mention of inclusive as the most important ingredient for development. In India, the country which has observed sustained high growth of GDP for almost a decade now, every recent policy docum作者: seruting 時(shí)間: 2025-4-1 04:20 作者: buoyant 時(shí)間: 2025-4-1 07:49
E. Harvey Richardson,Christopher L. Morbeyauritius withstand the global crisis? In part, the country was fairly resilient due to the nature of its economy, underpinned by an effective economic transformation and solid policies in place prior to the crisis. These policies and structural economic transformation have shielded the country again作者: Electrolysis 時(shí)間: 2025-4-1 13:52
