scholarly journals DIVISION IX / COMMISSION 30/ WORKING GROUP 9TH CATALOGUE OF SPECTROSCOPIC BINARY SYSTEMS

2007 ◽  
Vol 3 (T26B) ◽  
pp. 199-199
Author(s):  
Dimitri Pourbaix ◽  
Alan H. Batten ◽  
Frank C. Fekel ◽  
William H. Hartkopf ◽  
Hugo Levato ◽  
...  
Keyword(s):  
Working Group ◽  
Binary Systems ◽  
General Assembly ◽  
Stellar Systems ◽  
The Past ◽  
Spectroscopic Binary ◽  
Substantial Progress ◽  
Current Content

The current content of the database was presented, emphasising the substantial progress accomplished since the IAU XXIV General Assembly in Manchester, 2000. More than 1 200 stellar systems have been added to the 8th Catalogue over the past six years, for a total of 540 papers compiled. A first paper was published to make the community aware of this facility (Pourbaix et al. 2004).

scholarly journals Commission 37: Star Clusters and Associations

1982 ◽  
Vol 18 (1) ◽  
pp. 499-526
Keyword(s):  
Globular Cluster ◽  
Working Group ◽  
Globular Clusters ◽  
Star Clusters ◽  
Open Clusters ◽  
General Assembly ◽  
Active Period ◽  
Star Clusters And Associations ◽  
The Past ◽  
Good Number

The past triennium has been a very active period in most branches of cluster research. Some controversial subjects, notably globular cluster abundances and ages have received much attention. A good number of photometric papers on clusters as well as associations have been published. Observational effects of mass loss have been discussed by several astronomers.This report has been assembled by the president of the commission although several sections have been contributed by other members. The report will first list some highlights in the activities of our commission. Then follow the tables containing current investigations of OB associations, open clusters and globular clusters. These have been assembled by B. Balázs, G. Harris and R. White, respectively. After these tables comes a section by D. Heggie about dynamics of star clusters. A working group under the chairmanship of A. Moffat has made a proposal about the numbering of stars in clusters. The proposal, which is included here will be discussed by our commission at the IAU General Assembly.

Working Group for the Worldwide Development of Astronomy Groupe De Travail Pour Le Developpement Mondial De L’Astronomie

1997 ◽  
Vol 23 (1) ◽  
pp. 57-58
Author(s):  
A. H. Batten
Keyword(s):  
Working Group ◽  
Mailing List ◽  
General Assembly ◽  
Present System ◽  
The Past ◽  
Regular Change ◽  
To Receive ◽  
Active Membership

During the past triennium some effort has been put into setting up what we hope will be an effective Working Group which currently has the above composition. Membership includes the Presidents of Commissions 38 and 46 ex-officio, so some regular change is built in every three years, as these Presidents change. Thanks are due to R. Kippenhahn, P. Lena, and J. Sahade, members of the original Working Group, who have retired from its active membership. The Chairman retains an extensive mailing list of about some 100 names. All those on that list will continue to receive the WG Newsletter. The present system is to mail one Newsletter annually, in April. At the time of writing, two such mailings have been made since the last General Assembly.

Bence-albee after 25 years: A new superior α-factor correction procedure for the quantitative analysis of oxides and silicates

1992 ◽  
Vol 50 (2) ◽  
pp. 1744-1745
Author(s):  
John T. Armstrong
Keyword(s):  
Quantitative Analysis ◽  
Electron Microprobe ◽  
Binary Systems ◽  
Correction Procedure ◽  
Geological Samples ◽  
The Past ◽  
Large Matrix ◽  
Computational Speed ◽  
Microprobe Data ◽  
Geological Sciences

One of the most cited papers in the geological sciences has been that of Albee and Bence on the use of empirical " α -factors" to correct quantitative electron microprobe data. During the past 25 years this method has remained the most commonly used correction for geological samples, despite the facts that few investigators have actually determined empirical α-factors, but instead employ tables of calculated α-factors using one of the conventional "ZAF" correction programs; a number of investigators have shown that the assumption that an α-factor is constant in binary systems where there are large matrix corrections is incorrect (e.g, 2-3); and the procedure’s desirability in terms of program size and computational speed is much less important today because of developments in computing capabilities. The question thus exists whether it is time to honorably retire the Bence-Albee procedure and turn to more modern, robust correction methods. This paper proposes that, although it is perhaps time to retire the original Bence-Albee procedure, it should be replaced by a similar method based on compositiondependent polynomial α-factor expressions.

scholarly journals Recent progress understanding pathophysiology and genesis of brain AVM—a narrative review

2021 ◽  
Author(s):  
Hans-Jakob Steiger
Keyword(s):  
Large Degree ◽  
Advanced Imaging ◽  
Genetic Origin ◽  
The Past ◽  
Open Questions ◽  
Brain Avm ◽  
Pubmed Search ◽  
Substantial Progress ◽  
The Individual ◽  
Arterial Aneurysms

AbstractConsiderable progress has been made over the past years to better understand the genetic nature and pathophysiology of brain AVM. For the actual review, a PubMed search was carried out regarding the embryology, inflammation, advanced imaging, and fluid dynamical modeling of brain AVM. Whole-genome sequencing clarified the genetic origin of sporadic and familial AVM to a large degree, although some open questions remain. Advanced MRI and DSA techniques allow for better segmentation of feeding arteries, nidus, and draining veins, as well as the deduction of hemodynamic parameters such as flow and pressure in the individual AVM compartments. Nonetheless, complete modeling of the intranidal flow structure by computed fluid dynamics (CFD) is not possible so far. Substantial progress has been made towards understanding the embryology of brain AVM. In contrast to arterial aneurysms, complete modeling of the intranidal flow and a thorough understanding of the mechanical properties of the AVM nidus are still lacking at the present time.

The Formation of a Customary International Crime: Global Terrorism Human (In) Security

2015 ◽  
Vol 15 (4) ◽  
pp. 665-699 ◽  
Author(s):  
Noemi Gal-Or
Keyword(s):  
Armed Conflict ◽  
International Criminal ◽  
International Crime ◽  
Customary Law ◽  
International Criminal Law ◽  
General Assembly ◽  
The Past ◽  
Peace And Security ◽  
Global Terrorism ◽  
Definition Of

The article studies the concept of human security (hs) as embraced by the un General Assembly and Secretary Generals, and its instrumentality in the promotion of a customary international crime of global terrorism. Such a crime exists in the opinion of the Appellate Chamber of the Special Tribunal for Lebanon. Regarding terrorism in international criminal law (icl), not in armed conflict, I maintain that the concept of hs has been pivotal in furthering the “criminalisation” of terrorism in matters peace and security. I submit that (i) that the absence of a universally agreed upon definition of (global) terrorism does not suffice to detract from the finding that such a transnational crime exists, and (ii) in addition to the various and largely agreed constitutive elements of customary law, normative paradigmatic developments – here in the case of terrorism, and in the past two decades – have significantly supported this customarisation trend.

THE STATUS OF TWO-NEUTRINO AND NEUTRINOLESS DOUBLE BETA DECAY SEARCHES

1993 ◽  
Vol 02 (03) ◽  
pp. 507-546 ◽  
Author(s):  
M.K. MOE
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Experimental Activity ◽  
The Past ◽  
The Status ◽  
Substantial Progress ◽  
Direct Counting ◽  
Made In

Substantial progress has been made in double beta decay experiments in the past few years, including the beginning of sensitive new searches for neutrinoless double beta decay, and several additional positive detections of the two-neutrino mode by geochemical, radiochemical, and direct-counting techniques. This review discusses the recent experimental activity.

Think Tanks in East Asia in Need of More Cooperation and More Networking: NEAT after its Ten Years

2012 ◽  
Vol 04 (03) ◽  
pp. 91-96
Author(s):  
John WONG
Keyword(s):  
East Asia ◽  
Working Group ◽  
Regional Cooperation ◽  
Process Research ◽  
Think Tanks ◽  
Relevant Research ◽  
The Past ◽  
Research Institutes ◽  
Working Groups ◽  
Important Progress

NEAT is a loosely constituted regional scheme under the ASEAN plus Three (APT) framework. Its main objectives are to promote exchange among APT scholars and research institutes in the region, and to promote relevant research that can facilitate the APT regional cooperation process. Research is done through organising Working Groups. NEAT has made important progress in the past 10 years. To grow and expand in future, it will have to improve on its networking function and strengthen its Working Group mechanism.

scholarly journals DIVISION IX / COMMISSION 25 / WORKING GROUP INFRARED ASTRONOMY

2008 ◽  
Vol 4 (T27A) ◽  
pp. 313-315
Author(s):  
Eugene F. Milone ◽  
Andrew T. Young ◽  
Eva Bauwens ◽  
Roger A. Bell ◽  
Michael S. Bessell ◽  
...  
Keyword(s):  
Working Group ◽  
General Assembly ◽  
Infrared Photometry ◽  
Water Vapour Content ◽  
Atmospheric Extinction ◽  
Variable Water ◽  
Johnson System ◽  
Atmospheric Windows ◽  
New System ◽  
Over Time

As we have noted before, the WG-IR was created following a Joint Commission Meeting at the IAU General Assembly in Baltimore in 1988, a meeting that provided both diagnosis and prescription for the perceived ailments of infrared photometry at the time. The results were summarized in Milone (1989). The challenges involve how to explain the failure to systematically achieve the milli-magnitude precision expected of infrared photometry and an apparent 3% limit on system transformability. The proposed solution was to re-define the broadband Johnson system, the passbands of which had proven so unsatisfactory that over time effectively different systems proliferated although bearing the same JHKLMNQ designations; the new system needed to be better positioned and centered in the atmospheric windows of the Earth's atmosphere, and the variable water vapour content of the atmosphere needed to be measured in real time to better correct for atmospheric extinction.

scholarly journals Proceedings of the Joint Discussion: Parameters of the Earth's Gravitational Field

1966 ◽  
Vol 12 (2) ◽  
pp. 607-609
Author(s):  
A. H. Cook
Keyword(s):  
Gravitational Field ◽  
Executive Committee ◽  
Working Group ◽  
General Assembly ◽  
International Astronomical Union ◽  
Earth’S Gravitational Field ◽  
International Astronomical ◽  
Astronomical Constants

The Chairman, W. Fricke, President of Commission 4, opened the Joint Discussion by drawing attention to the purpose and proposed procedure for the meeting. The Joint Discussion had been arranged by the Executive Committee of the Union in order to avoid the necessity for separate discussions by each Commission that was affected by the Report of the Working Group on the IAU System of Astronomical Constants. The Organizing Committee therefore proposed the following resolution:‘The members of the IAU at this Joint Discussion recommend to the Executive Committee that the following resolution be put before the General Assembly: “The International Astronomical Union endorses the final list of constants prepared by the Working Group on the System of Astronomical Constants and recommends that it be used in the national and international astronomical ephemerides at the earliest practicable date.’”

scholarly journals Proceedings of the Joint Discussion: Arguments in Favor of the Revision of the Conventional System of Astronomical Constants

1966 ◽  
Vol 12 (2) ◽  
pp. 604-606
Author(s):  
W. Fricke
Keyword(s):  
Executive Committee ◽  
Working Group ◽  
General Assembly ◽  
Conventional System ◽  
International Astronomical Union ◽  
International Astronomical ◽  
Astronomical Constants

The Chairman, W. Fricke, President of Commission 4, opened the Joint Discussion by drawing attention to the purpose and proposed procedure for the meeting. The Joint Discussion had been arranged by the Executive Committee of the Union in order to avoid the necessity for separate discussions by each Commission that was affected by the Report of the Working Group on the IAU System of Astronomical Constants. The Organizing Committee therefore proposed the following resolution:‘The members of the IAU at this Joint Discussion recommend to the Executive Committee that the following resolution be put before the General Assembly: “The International Astronomical Union endorses the final list of constants prepared by the Working Group on the System of Astronomical Constants and recommends that it be used in the national and international astronomical ephemerides at the earliest practicable date.’”

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