Hard X-ray properties of magnetic cataclysmic variables (2009)
Scaringi, S., Bird, A. J., Norton, A. J., Knigge, C., Hill, A. B., Clark, D. J., ...
Hard X-ray surveys have proven remarkably efficient in detecting intermediate polars and asynchronous polars, two of the rarest type of cataclysmic variable (CV). Here we present a global study of...
Discovery of the orbital period in the supergiant fast X-ray transient IGR J17544-2619 (2009)
Clark, D. J., Hill, A. B., Bird, A. J., McBride, V. A., Scaringi, S., Dean, A. J.
The supergiant fast X-ray transient (SFXT) system IGR J17544-2619 has displayed many large outbursts in the past and is considered an archetypal example of SFXTs. A search of the INTEGRAL/ISGRI data...
High energy emission and polarisation limits for the INTEGRAL burst GRB 061122 (2009)
McGlynn, S., Foley, S., McBreen, B., Hanlon, L., McBreen, S., Clark, D. J., ...
(Abridged) GRB 061122 is one of the brightest GRBs detected within INTEGRAL's field of view to date. The two gamma-ray detectors on INTEGRAL were used to investigate the spectral characteristics of...
First measurement of the neutron β asymmetry with ultracold neutrons (2009)
Anaya, J., Back, H. O., Boissevain, J. G., Bowles, T. J., Broussard, L. J., ...
We report the first measurement of an angular correlation parameter in neutron β decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and...
High energy emission and polarisation limits for the INTEGRAL burst GRB 061122 (2009)
McGlynn, S., Foley, S., McBreen, B., Hanlon, L., McBreen, S., Clark, D. J., ...
ISINA: INTEGRAL Source Identification Network Algorithm (2008)
Scaringi, S., Bird, A. J., Clark, D. J., Dean, A. J., Hill, A. B., McBride, V. A., ...
We give an overview of ISINA: INTEGRAL Source Identification Network Algorithm. This machine learning algorithm, using Random Forests, is applied to the IBIS/ISGRI dataset in order to ease the...
An unexpected outburst from A0535+262 (2007)
Hill, A. B., Bird, A. J., Dean, A. J., McBride, V. A., Sguera, V., Clark, D. J., ...
A0535+262 is a transient Be/X-ray binary system which was in a quiescent phase from 1994-2005. In this paper we report on the timing and spectral properties of the INTEGRAL detection of the source in...
The 3rd IBIS/ISGRI soft gamma-ray survey catalog (2007)
Bird, A. J., Malizia, A., Bazzano, A., Barlow, E. J., Bassani, L., Hill, A. B., ...
In this paper we report on the third soft gamma-ray source catalog obtained with the IBIS/ISGRI gamma-ray imager on board the INTEGRAL satellite. The scientific dataset is based on more than 40 Ms of...
McGlynn, S., Clark, D.J., Dean, A.J., Hanlon, L., McBreen, S., Willis, D.R., ...
The spectrometer aboard INTEGRAL, SPI, has the capability to detect the signature of polarised emission from a bright gamma-ray source. GRB 041219a is the most intense burst localised by INTEGRAL and...
McGlynn, S., Clark, D. J., Dean, A. J., Hanlon, L., McBreen, S., Willis, D. R., ...
The spectrometer aboard INTEGRAL, SPI, has the capability to detect the signature of polarised emission from a bright gamma-ray source. GRB 041219a is the most intense burst localised by INTEGRAL and...
IGR J18483-0311: an accreting X-ray pulsar observed by INTEGRAL (2007)
Sguera, V., Hill, A. B., Bird, A. J., Dean, A. J., Bazzano, A., Ubertini, P., ...
IGR J18483-0311 is a poorly known transient hard X-ray source discovered by INTEGRAL during observations of the Galactic Center region performed between 23--28 April 2003. Aims: To detect new...
The 3rd IBIS/ISGRI soft gamma-ray survey catalog (2006)
Bird, A. J., Malizia, A., Bazzano, A., Barlow, E. J., Bassani, L., Hill, A. B., ...
In this paper we report on the third soft gamma-ray source catalog obtained with the IBIS/ISGRI gamma-ray imager on board the INTEGRAL satellite. The scientific dataset is based on more than 40 Ms of...
Sguera, V., Bird, A. J., Dean, A. J., Bazzano, A., Ubertini, P., Landi, R., ...
Context: AXJ1845.0-0433 was discovered by ASCA in 1993 during fast outburst activity characterized by several flares on short timescales. Up to now, the source was not detected again by any X-ray...
Unveiling supergiant fast x-ray transient sources with INTEGRAL (2006)
Sguera, V., Bazzano, A., Bird, A.J., Dean, A.J., Ubertini, P., Barlow, E.J., ...
Supergiant high-mass X-ray binaries (SGXBs) are believed to be rare objects, as stars in the supergiant phase have a very short lifetime and to date only about a dozen of them have been discovered....
20-100 keV properties of cataclysmic variables detected in the INTEGRAL/IBIS survey (2006)
Barlow, E. J., Knigge, C., Bird, A. J., Dean, A. J., Clark, D. J., Hill, A. B., ...
Analysis of INTEGRAL/IBIS survey observations has revealed that the rare intermediate polar and asynchronous polar cataclysmic variables are consistently found to emit in the 20-100 keV energy band,...
INTEGRAL observations of AGN obscured by the Galactic Plane (2006)
Molina, M., Malizia, A., Bassani, L., Bird, A. J., Dean, A. J., Landi, R., ...
In this paper we present INTEGRAL observations of 7 AGNs: two newly discovered type 1 Seyferts, IGR J18027-1455 and IGR J21247+5058, and five well known Seyferts, NGC 6814 (type 1.5), Cyg A (Type 2),...
Unveiling supergiant fast X-ray transient sources with INTEGRAL (2006)
Sguera, V., Bazzano, A., Bird, A. J., Dean, A. J., Ubertini, P., Barlow, E. J., ...
Supergiant high mass X-ray binaries (SGXBs) are believed to be rare objects, as stars in the supergiant phase have a very short lifetime and to date only about a dozen of them have been discovered....
Long, J. C., Barnes, P. D., Boissevain, J. G., Clark, D. J., Cooper, M. D., Gomez, J. J., ...
A new search for a permanent electric dipole moment (EDM) of the neutron is underway using ultracold neutrons produced and held in a bath of superfluid helium. Attaining the target sensitivity...
INTEGRAL observations of recurrent fast X-ray transient sources (2005)
Sguera, V., Barlow, E. J., Bird, A. J., Clark, D. J., Dean, A. J., Hill, A. B., ...
Fast X-ray Transients (FXTs) are believed to be non-recurrent bright X-ray sources lasting less than a day and occuring at serendipitous positions, they can best detected and discovered by...
Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922 (2005)
Barlow, E. J., Bird, A. J., Clark, D. J., Cornelisse, R., Dean, A. J., Hill, A. B., ...
We present the transient nature of INTEGRAL source IGR J17285-2922, identified from a single period of activity during an IBIS/ISGRI Galactic Centre Deep Exposure in September 2003. The source has a...
Evidence of polarisation in the prompt gamma-ray emission from GRB 930131 and GRB 960924 (2005)
Willis, D. R., Barlow, E. J., Bird, A. J., Clark, D. J., Dean, A. J., McConnell, M. L., ...
The true nature of the progenitor to GRBs remains elusive; one characteristic that would constrain our understanding of the GRB mechanism considerably is gamma-ray polarimetry measurements of the...
INTEGRAL observations of recurrent fast X-ray transient sources (2005)
Sguera, V., Barlow, E.J., Bird, A.J., Clark, D.J., Dean, A.J., Hill, A.B., ...
Fast X-ray Transients (FXTs) are believed to be non-recurrent bright X-ray sources lasting less than a day and occuring at serendipitous positions, they can best detected and discovered by...
Testbed for development of control subsystem for an Earth orbiting sactterometer (2004)
Clark, D. J., Bachmann, A., Clark, D., Lang, M., Nishimoto, K., Shirbacheh, M., ...
PHENIX detector overview (2003)
Adcox, K., Adler, S.S., Aizama, M., Ajitanand, N.N., Akiba, Y., Akikawa, H., ...
PHENIX detector overview (2003)
Adcox, K., Adler, S.S., Aizama, M., Ajitanand, N.N., Akiba, Y., Akikawa, H., ...
Lamoreaux, S. K., Archibald, G., Barnes, P. D., Buttler, W. T., Clark, D. J., Cooper, M. D., ...
We have measured the mass diffusion coefficient D of 3He in superfluid 4He at temperatures lower than were previously possible. The experimental technique utilizes scintillation light produced when...
High intensity ion beam injection into the 88-inch cyclotron (2001)
Wutte, D., Clark, D.J., Laune, B., Leitner, M.A., Lyneis, C.M.
High intensity ion beam injection into the 88-inch cyclotron (2001)
Wutte, D., Clark, D.J., Laune, B., Leitner, M.A., Lyneis, C.M.
G A Kiker, D J Clark, African Hydrology
Abstract. An object-oriented modeling system (ACRU2000) was created to enable users to simulate the hydrological and environmental effects of various land uses in the Republic of South Africa. The...
Histone contributions to the structure of DNA in the nucleosome.
Hayes, J J, Clark, D J, Wolffe, A P
We describe the application of the hydroxyl radical footprinting technique to examine the contribution of the core histone tails and of histones H3 and H4 to the structure of DNA in the nucleosome....
Sparer, T E, Wynn, S G, Clark, D J, Kaplan, J M, Cardoza, L M, Wadsworth, S C, ...
Currently, adenovirus (Ad) is being considered as a vector for the treatment of cystic fibrosis as well as other diseases. However, the cytotoxic T lymphocyte (CTL) response to Ad could limit the...
Chromatin assembly on replicating DNA in vitro.
Almouzni, G, Clark, D J, Méchali, M, Wolffe, A P
Replicating single-stranded DNA is preferentially assembled into chromatin in Xenopus egg extracts relative to non-replicating double-stranded DNA. We have examined the molecular basis of this...
Sigma elements are position-specific for many different yeast tRNA genes.
Sandmeyer, S B, Bilanchone, V W, Clark, D J, Morcos, P, Carle, G F, Brodeur, G M
We determined the DNA sequence of seventeen sigma elements and flanking regions in order to investigate the extent of the association between the yeast repetitive element, sigma, and tRNA genes....
Formation of nucleosomes on positively supercoiled DNA.
A transcribing RNA polymerase is thought to generate positive supercoils in front of the advancing transcription complex and negative supercoils behind. We have examined the possibility that positive...
Superhelical stress and nucleosome-mediated repression of 5S RNA gene transcription in vitro.
Nucleosomes were assembled on a plasmid carrying a Xenopus somatic 5S RNA gene prepared at different superhelix densities. The gene was preferentially assembled into a positioned nucleosome which was...
Alpha-helix in the carboxy-terminal domains of histones H1 and H5.
Clark, D J, Hill, C S, Martin, S R, Thomas, J O
Although the carboxy-terminal domains of histones H1 and H5 exist as random-coil in aqueous solution, secondary structure prediction suggests that this region has a high potential for alpha-helix...
Familial antithrombin III deficiency and Mycoplasma pneumoniae pneumonia.
Creagh, M D, Roberts, I F, Clark, D J, Preston, F E
A 10 year old girl presented with a massive femoral vein thrombosis associated with Mycoplasma pneumoniae pneumonia. Subsequently type I familial antithrombin III deficiency was diagnosed. It is...
Histone contributions to the structure of DNA in the nucleosome.
Hayes, J J, Clark, D J, Wolffe, A P
We describe the application of the hydroxyl radical footprinting technique to examine the contribution of the core histone tails and of histones H3 and H4 to the structure of DNA in the nucleosome....
Sparer, T E, Wynn, S G, Clark, D J, Kaplan, J M, Cardoza, L M, Wadsworth, S C, ...
Currently, adenovirus (Ad) is being considered as a vector for the treatment of cystic fibrosis as well as other diseases. However, the cytotoxic T lymphocyte (CTL) response to Ad could limit the...
Chromatin assembly on replicating DNA in vitro.
Almouzni, G, Clark, D J, Méchali, M, Wolffe, A P
Replicating single-stranded DNA is preferentially assembled into chromatin in Xenopus egg extracts relative to non-replicating double-stranded DNA. We have examined the molecular basis of this...
Sigma elements are position-specific for many different yeast tRNA genes.
Sandmeyer, S B, Bilanchone, V W, Clark, D J, Morcos, P, Carle, G F, Brodeur, G M
We determined the DNA sequence of seventeen sigma elements and flanking regions in order to investigate the extent of the association between the yeast repetitive element, sigma, and tRNA genes....
Formation of nucleosomes on positively supercoiled DNA.
A transcribing RNA polymerase is thought to generate positive supercoils in front of the advancing transcription complex and negative supercoils behind. We have examined the possibility that positive...
Superhelical stress and nucleosome-mediated repression of 5S RNA gene transcription in vitro.
Nucleosomes were assembled on a plasmid carrying a Xenopus somatic 5S RNA gene prepared at different superhelix densities. The gene was preferentially assembled into a positioned nucleosome which was...
Alpha-helix in the carboxy-terminal domains of histones H1 and H5.
Clark, D J, Hill, C S, Martin, S R, Thomas, J O
Although the carboxy-terminal domains of histones H1 and H5 exist as random-coil in aqueous solution, secondary structure prediction suggests that this region has a high potential for alpha-helix...
Familial antithrombin III deficiency and Mycoplasma pneumoniae pneumonia.
Creagh, M D, Roberts, I F, Clark, D J, Preston, F E
A 10 year old girl presented with a massive femoral vein thrombosis associated with Mycoplasma pneumoniae pneumonia. Subsequently type I familial antithrombin III deficiency was diagnosed. It is...
Propranolol induced bradycardia in tetralogy of Fallot.
Clark, D J, Chan, K C, Gibbs, J L
When an 18 month old girl who had tetralogy of Fallot and episodes of severe cyanosis with loss of consciousness was treated with propranolol there was some improvement. But when the dose was...
Clark, D. J., Clark, R. A., Lipworth, B. J.
BACKGROUND: The aim of this study was to compare the systemic bioactivity of inhaled budesonide (B) and fluticasone propionate (F), each given by large volume spacer, on a microgram equivalent basis...
BACKGROUND: The aim of this study was to extend previous in vitro observations regarding the effects of multiple actuations of aerosols into spacer devices, delayed inhalation, and antistatic...
Clark, D J, Grove, A, Cargill, R I, Lipworth, B J
BACKGROUND: A study was performed to compare the adrenal suppression caused by inhaled fluticasone propionate and budesonide on a microgram equivalent basis, each given by metered dose inhaler to...
Lung bioavailability of generic and innovator salbutamol metered dose inhalers.
Clark, D J, Gordon-Smith, J, McPhate, G, Clark, G, Lipworth, B J
BACKGROUND: The aim of this study was to determine whether significant differences exist in lung bioavailability between generic (Salamol, Salbulin) and innovator (Ventolin) formulations of inhaled...
BACKGROUND: In a previous single dosing comparison between fluticasone propionate and budesonide differences in cortisol levels measured at 08.00 hours were observed at doses in excess of 1000...
Lipworth, B. J., Clark, D. J., Koch, P., Arbeeny, C.
BACKGROUND: Racemic salbutamol remains one of the most commonly used bronchodilators in the treatment of reversible airways obstruction. Data from animal and human studies suggest that the S-isomer,...
Effects of airway calibre on lung delivery of nebulised salbutamol
BACKGROUND: A study was undertaken to test the hypothesis that airway calibre may alter lung deposition and therefore lung bioavailability of inhaled drugs as a result of narrowed airways reducing...
Lipworth, B. J., Clark, D. J., McFarlane, L. C.
BACKGROUND: In a previous single dosing study in asthmatic school children fluticasone propionate produced significantly greater suppression of overnight urinary cortisol excretion than budesonide at...
Endocrine deficit after fractionated total body irradiation.
Ogilvy-Stuart, A L, Clark, D J, Wallace, W H, Gibson, B E, Stevens, R F, Shalet, S M, ...
Endocrine function was assessed in 31 children (17 boys) after fractionated total body irradiation used in the preparative regimen for bone marrow transplantation. Endocrine dysfunction was present...
A Perfectly Discriminating Rent-Seeking Contest with Many Winners.
GAME THEORY;ECONOMIC EQUILIBRIUM
On the Win Probability in Rent-Seeking Gemes.
This paper identifies and attempts to fill a gap in the literature on rent-seeking. Many papers in the areas employ a logit win probability without considering whether or why such a choice should be...
Rank-Order Tournaments and Selection.
Rank order tournaments are often presented as incentive devices: a tournament in which the hardest working individual gains promotion to the next level in a firms' hierarchy may induce workers to...
This paper discusses the photographic representation of disaster in the minority world. It argues that the international image economy has a strong influence on the content of the images produced;...