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Search Results: 1 - 10 of 130671 matches for " V. McIntyre "
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The Interaction between the ISM and Star Formation in the Dwarf Starburst Galaxy NGC 4214
F. Walter,C. Taylor,S. Huettemeister,N. Scoville,V. McIntyre
Physics , 2000, DOI: 10.1086/318775
Abstract: We present the first interferometric study of the molecular gas in the metal-poor dwarf starburst galaxy NGC 4214. Our map of the 12CO(1-0) emission, obtained at the OVRO millimeter array, reveals an unexpected structural wealth. We detected three regions of molecular emission in the north-west (NW), south-east (SE) and centre of NGC 4214 which are in very different and distinct evolutionary stages (total molecular mass: 5.1 x 10^6 M_sun). These differences are apparent most dramatically when the CO morphologies are compared to optical ground based and HST imaging: massive star formation has not started yet in the NW region; the well-known starburst in the centre is the most evolved and star formation in the SE complex started more recently. We derive a star formation efficiency of 8% for the SE complex. Using high--resolution VLA observations of neutral hydrogen HI and our CO data we generated a total gas column density map for NGC 4214 (HI + H_2). No clear correlation is seen between the peaks of HI, CO and the sites of ongoing star formation. This emphasizes the irregular nature of dwarf galaxies. The HI and CO velocities agree well, so do the H-alpha velocities. In total, we cataloged 14 molecular clumps in NGC 4214. Our results from a virial mass analysis are compatible with a Galactic CO-to-H_2 conversion factor for NGC 4214 (lower than what is usually found in metal-poor dwarf galaxies).
The Peculiar Rotation Curve of NGC 157
S. D. Ryder,A. V. Zasov,V. McIntyre,W. Walsh,O. Sil'chenko
Physics , 1997, DOI: 10.1046/j.1365-8711.1998.01138.x
Abstract: We present the results of a new HI, optical, and H-alpha interferometric study of the nearby spiral galaxy NGC 157. Our combined C- and D-array observations with the VLA show a large-scale, ring-like structure in the neutral hydrogen underlying the optical disk, together with an extended, low surface density component going out to nearly twice the Holmberg radius. Beginning just inside the edge of the star-forming disk, the line of nodes in the gas disk commences a 60 degree warp, while at the same time, the rotation velocity drops by almost half its peak value of 200 km/s, before leveling off again in the outer parts. While a flat rotation curve in NGC 157 cannot be ruled out, supportive evidence for an abrupt decline comes from the ionised gas kinematics, the optical surface photometry, and the global HI profile. A standard `maximum-disk' mass model predicts comparable amounts of dark and luminous matter within NGC 157. Alternatively, a model employing a disk truncated at 2 disk scale lengths could equally well account for the unusual form of the rotation curve in NGC 157.
Information scanning – keeping in touch with best practice in breastfeeding
Ellen McIntyre
International Breastfeeding Journal , 2006, DOI: 10.1186/1746-4358-1-15
Abstract: There is so much we still need to know about how best to enable mothers to successfully breastfeed. In addition, we are all time-poor in an ever increasing information-rich environment. This paper describes some of the methods practitioners (those directly involved with helping mothers) can use to scan the environment for up-to-date information about best practice in breastfeeding. By keeping in touch – with other practitioners and International Board Certified Lactation Consultants (IBCLC), with researchers, with decision makers, and with research findings – practitioners can ensure they help mothers most effectively.Attend relevant conferences, seminars and workshops in your area but also once in a while go to a conference in another state or region or even overseas. While there is an added cost, it is worthwhile broadening your horizons beyond your local area. While at conferences, make the most of the opportunity and network with other delegates. To keep informed about conferences, join your local professional lactation organization and the International Lactation Consultants Association (ILCA) [1]. Check their websites as well as the International Board of Lactation Consultants Examiners (IBLCE) website regularly to keep up to date with issues pertinent to this profession [2]. Their links are also worth viewing. You might also organize to visit other IBCLCs at their workplaces.Lactnet, an email list of health professionals and others interested in discussing issues of breastfeeding contains a wealth of information [3]. Although it can be very time consuming to read the emails submitted by those among the 3300 plus subscribers, it does have an archival facility to assist with searching specific topics.As mentioned above, attend conferences but also make the effort to talk to the researchers who are presenting their work. If you have read some of their work, send them an email (most papers list author contact details) if you wish to know more or wish to share you
Globalism, Human Rights and the Problem of Individualism
Richard McIntyre
Human Rights & Human Welfare , 2003,
Are Workers Rights Human Rights and Would It Matter If They Were?
Richard McIntyre
Human Rights & Human Welfare , 2006,
The World Court’s ongoing contribution to international water law: The Pulp Mills Case between Argentina and Uruguay
Owen McIntyre
Water Alternatives , 2011,
Abstract: The judgment of the International Court of Justice in the Pulp Mills (Argentina v. Uruguay) case makes a very important contribution to international law relating to shared international water resources and to international environmental law more generally. It does much to clarify the relationship between procedural and substantive rules of international environmental law. The Court linked interstate notification of new projects to the satisfaction of the customary due diligence obligation to prevent significant transboundary harm. It found that environmental impact assessment (EIA) is an essential requirement of customary international law in respect of activities having potential transboundary effects. The real significance of the judgment is that it held that the duty to notify, and the related duty to conduct an EIA taking account of transboundary impacts, exist in customary international law and thus apply to all states, not just those that have concluded international agreements containing such obligations. The Court confirmed that for shared international water resources, the principle of equitable and reasonable utilisation, universally accepted as the cardinal rule of international water law, is virtually synonymous with the concept of sustainable development, and suggests that considerations of environmental protection are absolutely integral to the equitable balancing of interests involved. The judgment makes it clear that the principle of equitable utilisation ought to be understood as a process, rather than a normatively determinative rule. This ought to help to address widespread confusion about the nature of the key rules and principles of international water resources law and its role in the resolution of water resources disputes and in environmental diplomacy more generally.
Identification of co-regulated transcripts affecting male body size in Drosophila
Cynthia J Coffman, Marta L Wayne, Sergey V Nuzhdin, Laura A Higgins, Lauren M McIntyre
Genome Biology , 2005, DOI: 10.1186/gb-2005-6-6-r53
Abstract: Unraveling complex traits requires an understanding of how genetic variation results in variation among transcript levels, proteins, and metabolites, and how this variation generates phenotypic variation. These distinct levels in the biological system are interdependent. The ability to model interactions among loci at each of these levels, and relationships between levels, is key to providing insight into complex traits. The promise of genomic and proteomic technology is in capturing variation for thousands of loci simultaneously. This affords an unprecedented opportunity to understand the consequences of genetic variation. Many studies have exploited this ability through the use of mutant analysis applied to whole-genome transcript arrays. Mutant analysis provides insight into the impact of a mutation on a gene network and whole-genome studies of transcription have revealed misexpression due to gene knockouts and have established redundancy and specificity of transcriptional regulation [1]. Cluster analysis has been successfully combined with tests of differential expression to study whole-genome response to mutation in order to develop hypotheses about co-regulation and coordinated expression [2,3].However, the consequences of such strong perturbations are difficult to apply to pathways in non-mutant individuals. In addition, the mutations chosen usually cause a severe alteration in a single gene, such as a knockout. Natural variants introduce smaller changes in pathways [4] and natural variants may exhibit allelic differences at several loci. Natural variation in the transcriptome as a consequence of genetic variation has been demonstrated [5,6]. Natural genotypes can also be mated in a deliberate manner and the progeny of such matings can be used to estimate the genetic architecture of individual traits [7,8], and to link traits across different levels of the biological system [9,10]. We focus here on providing insight into how coordinated gene expression affect
How can we reduce the risk of mother-to-child transmission of HIV during invasive obstetric procedures?
CN Mnyani, E Nicolaou, E Bera, V Black, JC Hull, JA McIntyre
Southern African Journal of HIV Medicine , 2011,
Abstract: Antenatal invasive obstetric procedures may be diagnostic or therapeutic, and are performed at different stages of pregnancy for various indications. The most common indication for an invasive procedure during pregnancy is for fetal karyotyping when a chromosomal abnormality or a genetic defect is suspected, either from the couple’s history or from ultrasound assessment of the fetus. Other less common but equally important indications may be diagnostic (fetoscopy, fetal tissue sampling, estimation of fetal haemoglobin) or therapeutic (aspiration of various fetal cavities, fetal blood transfusion and embryo reductions). In a high HIV prevalence setting like South Africa, a significant proportion of pregnant women in need of invasive procedures will be HIV-infected.
Coupling of the X-ray and radio emission in the black hole candidate a nd compact jet source GX 339-4
S. Corbel,R. P. Fender,A. K. Tzioumis,M. Nowak,V. McIntyre,P. Durouchoux,R. Sood
Physics , 2000,
Abstract: We report the results of a long-term campaign of radio, soft- and hard- X-ray observations of the galactic black hole candidate GX 339-4. In the Low-Hard X-ray state the system displays a strong 3-way linear correlation between soft- and hard-X-rays and radio emission, implying a coupling between the Comptonising corona and a radio-emitting compact jet. In this state the radio emission is linearly polarised at a level of around 2 %, with an almost constant polarisation angle, indicative of a favored axis in this system probably related to the compact jet and/or black hole spin axis. In the Off X-ray state the radio emission declines with the X-ray emission to below detectable levels, suggesting that it is simply a lower-luminosity version of the Low-Hard state. In the High-Soft state both the hard-X-ray and radio emission are suppressed. We also note that the transitions from the Low-Hard state to the High-Soft state (and the reverse) are possibly associated with discrete ejection(s) of expanding relativistic plasma.
Radio Sources in the 2dF Galaxy Redshift Survey. I. Radio Source Populations
Elaine M. Sadler,V. J. McIntyre,C. A. Jackson,R. D. Cannon
Physics , 1999, DOI: 10.1071/AS99247
Abstract: We present the first results from a study of the radio continuum properties of galaxies in the 2dF Galaxy Redshift Survey, based on thirty 2dF fields covering a total area of about 100 square degrees. About 1.5% of galaxies with b(J) < 19.4 mag are detected as radio continuum sources in the NRAO VLA Sky Survey (NVSS). Of these, roughly 40% are star-forming galaxies and 60% are active galaxies (mostly low-power radio galaxies and a few Seyferts). The combination of 2dFGRS and NVSS will eventually yield a homogeneous set of around 4000 radio-galaxy spectra, which will be a powerful tool for studying the distriibution and evolution of both AGN and starburst galaxies out to redshift z=0.3.
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