4,344 research outputs found
Skylab S-191 spectrometer single spectral scan analysis program
Documentation and user information for the S-191 single spectral scan analysis program are reported. A breakdown of the computational algorithms is supplied, followed by the program listing and examples of sample output. A copy of the flow chart which describes the driver routine in the body of the main program segment is included
Acceptance checkout equipment - Spacecraft Monthly progress report, 15 Jan. - 15 Feb. 1966
Acceptance checkout equipment and spacecraft testin
AD Mensae: a dwarf nova in the period gap
AD Men was classified as a probable long-period dwarf nova based on its
long-term variability. Recent spectroscopic data instead suggested a
short-period system. With the here presented observations we aim at clarifying
its nature. Time--resolved photometry and spectroscopy has been used to get
information on the orbital period of this system. The light curve shows the
typical flickering and a clear hump--like periodic modulation with an average
amplitude of 0.3mag and a period of P=2.20(02)h. The radial velocity
measurements of the Halpha emission line confirm this value as the orbital
period. AD Men is thus located at the lower end of, but clearly inside, the gap
of the period distribution of cataclysmic variables, making it one of only 11
dwarf novae in this important period range.Comment: 5 pages, 6 figures, accepted by A&
Notes on the Morphology and Classification of the Sarcophagidae and Other Calyptrates (Diptera).
The application and correlation of recently discovered characters with others already in use in the Sarcophagidae clarify some problems of relationship among the major divisions of this family. The Agriini, including Wohlfahrtia, may be much more accurately defined, and may be shown to be very closely related to the Miltogramminae, but not so closely related to the Sarcophaginae with which they are often associated. Below tribal level relationships are still obscure, although certain natural groups are roughly recognizable. Published studies presenting more detailed phylogenetic systems for these lower levels can be shown to be untenable on the basis of recent information. During the course of this study several important papers on the morphology of other Diptera were found to have direct bearing on the morphology of the Sarcophagidae with the result that some structures in this family (and other calyptrates) are now homologizable with structures of lower Diptera and, often, with those of other orders. Accordingly, several nomenclatoral changes are adopted in this paper. Such changes are not altogether welcome to some systematists; but, in view of the fact that many of these terms are already in use in several nematocerous families, it does not seem wise to prolong the use of a completely separate system of terminology as is now reserved for the higher Diptera. Other terms new to the Sarcophagidae were necessitated by the application of characters which have not yet been used in the family. The value of such characters makes their introduction desirable, especially since there is at present an apparent paucity of modifications applicable to females. These characters are also offered to support the idea that the Sarcophagidae are not so devoid of external characters of phylogenetic significance as is sometimes thought; and further study is likely to result in the discovery of more usuable modifications
Procedures and toolsused in the investigationof New Zealand's historical earthquakes
New ZealandÂs tectonic setting, astride an obliquely convergent tectonic boundary, means that it has experienced many large earthquakes in its 200-year written historical records. The task of identifying and studying the largest early instrumental and pre-instrumental earthquakes, as well as identifying the smaller events, is being actively pursued in order to reduce gaps in knowledge and to ensure as complete and comprehensive a catalogue as is possible. The task of quantifying historical earthquake locations and magnitudes is made difficult by several factors. These include the range of possible earthquake focal depths, and the sparse, temporally- and spatially-variable historical population distribution which affects the availability of felt intensity information, and hence, the completeness levels of the catalogue. This paper overviews the procedures and tools used in the analysis, parameterisation, and recording of historical New Zealand earthquakes, with examples from recently studied historical
events. In particular, the 1855 M 8+ Wairarapa earthquake is discussed, as well as its importance for the eminent 19th century British geologist, Sir Charles Lyell, and for future global understanding of the connection between large earthquakes and sudden uplift, tilting and faulting on a regional scale
The Scatter in the Relationship between Redshift and the Radio-to-Submm Spectral Index
We derive the scatter in the relationship between redshift and radio-to-submm
spectral index, alpha^{350}_{1.4}, using the observed spectral energy
distributions of 17 low redshift star forming galaxies. A mean galaxy model is
derived, along with the rms scatter in alpha^{350}_{1.4}. The scatter is
roughly constant with redshift. Constant rms scatter, combined with the
flattening of the mean alpha^{350}_{1.4} -- z relationship with increasing
redshift, leads to increasing uncertainty for redshift estimates at high
redshifts. Normalizing by the dust temperature in the manner proposed by Blain
decreases the scatter in alpha^{350}_{1.4} for most of the sample, but does not
remove outliers, and free-free absorption at rest frequencies above 1.4 GHz is
not likely to be a dominant cause for scatter in the alpha^{350}_{1.4} -- z
relationship. We re-derive the cumulative redshift distribution of the 14 field
galaxies in a recent submm and radio source sample of Smail et al.. The most
likely median redshift for the distribution is 2.7, with a conservative lower
limit of z = 2, as was also found by Smail et al. based on the original
alpha^{350}_{1.4} -- z models. The normalization and shape of the redshift
distribution for the faint submm sources are consistent with those expected for
forming elliptical galaxies.Comment: Added Erratum, standard AAS LATEX forma
Fit for purpose? Pattern cutting and seams in wearables development
This paper describes how a group of practitioners and researchers are working across disciplines at Nottingham Trent University in the area of Technical Textiles. It introduces strands of ongoing enquiry centred around the development and application of stretch sensors on the body, focusing on how textile and fashion knowledge are being reflexively revealed in the collaborative development of seamful wearable concepts, and on the tensions between design philosophies as revealed by definitions of purpose. We discuss the current research direction of the Aeolia project, which seeks to exploit the literal gaps found in pattern cutting for fitted stretch garments towards experiential forms and potential interactions. Normative goals of fitness for purpose and seamlessness are interrogated and the potential for more integrated design processes, which may at first appear âupside downâ, is discussed
Dense Molecular Gas and the Role of Star Formation in the Host Galaxies of Quasi-Stellar Objects
New millimeter-wave CO and HCN observations of the host galaxies of
infrared-excess Palomar Green quasi-stellar objects (PG QSOs) previously
detected in CO are presented. These observations are designed to assess the
validity of using the infrared luminosity to estimate star formation rates of
luminous AGN by determining the relative significance of dust-heating by young,
massive stars and active galactic nuclei (AGN) in QSO hosts and IRAS galaxies
with warm, AGN-like infrared colors. The HCN data show the PG QSO host IZw1 and
most of the warm IRAS galaxies to have high L_IR / L'_HCN (>1600) relative to
the cool IRAS galaxy population for which the median L_IR / L'_HCN ~
890(+440,-470). If the assumption is made that the infrared emission from cool
IRAS galaxies is reprocessed light from embedded star-forming regions, then
high values of L_IR / L'_HCN are likely the result of dust heating by the AGN.
Further, if the median ratio of L'_HCN / L'_CO ~ 0.06 observed for Seyfert
galaxies and IZw1 is applied to the PG QSOs not detected in HCN, then the
derived L_IR / L'_HCN correspond to a stellar contribution to the production of
L_IR of ~ 7-39%, and star formation rates ~ 2-37 M_sun/yr are derived for the
QSO hosts. Alternatively, if the far-infrared is adopted as the star formation
component of the total infrared in cool galaxies, the stellar contributions in
QSO hosts to their L_FIR are up to 35% higher than the percentages derived for
L_IR. This raises the possibility that the L_FIR in several of the PG QSO
hosts, including IZw1, could be due entirely to dust heated by young, massive
stars. Finally, there is no evidence that the global HCN emission is enhanced
relative to CO in galaxies hosting luminous AGN.Comment: LaTex, 31 pages, including 9 postscript figures, AJ, in press
(December 2006
Developing a Pilot Case and Modelling the Development of a Large European CO<sub>2</sub> Transport Infrastructure -The GATEWAY H2020 Project
The H2020 GATEWAY project aims to develop a comprehensive model Pilot Case which, intentionally, will pave the ground for CCS deployment in Europe. It will result from the assessment of, technical, commercial, judicial and societal issues related to a future CO2 transport infrastructure. The Pilot Case derived on this basis, will emphasize a gateway for CO2 transport in the North Sea Basin. Four potential pilot cases have been evaluated through a combination of techno-economic modelling of the individual cases and evaluation against more qualitative criteria. The chosen Pilot Case, Rotterdam Nucleus, will be refined and developed during the remaining period of the GATEWAY project. To maximise impact, the GATEWAY project adapts its work to lay the foundation for a future application to a European âProject of Common Interestâ (PCI). Continuous dialogue with the most relevant stakeholders is an important part of GATEWAY, as a Coordination and Support Action (CSA) H2020 project
Revision of the genus \u3ci\u3eBoettcheria\u3c/i\u3e in America North of Mexico (Diptera: Sarcophagidae)
The seven Nearctic species of Boettcheria are revised and distributional data are given for North America. Both sexes can be identified from the key. Bionomic information is included. Boettcheria pugetensis Dodge, 1967 is placed as a junior synonym of B. melanderi Dodge, 1967 (NEW SYNONYM), and a lectotype is designated for B. cimbicis (Townsend). B. mexicana Lopes is recorded from the Nearctic region for the first time
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