Probing Fine-Scale Ionospheric Structure with the Very Large Array Radio Telescope (2009)
Cohen, A. S., Röttgering, H. J. A.
High resolution (~1 arcminute) astronomical imaging at low frequency (below 150 MHz) has only recently become practical with the development of new calibration algorithms for removing ionospheric...
Intema, H. T., Cotton, W. D., Cohen, A. S., Van Bemmel, I. M., Rottgering, H. J. A.
Calibration of radio interferometric observations becomes increasingly difficult towards lower frequencies. Below ~300 MHz, spatially variant refractions and propagation delays of radio waves...
Cohen, A.S., Coe, A.L, Kemp, D.B.
Although the Earth's environment is constantly changing, there have been a few unusual episodes over the last c. 200 Ma when change was extreme in terms of its rapidity, severity, long-lasting...
A. S. Cohen, J. N. Hewitt, C. B. Moore, D. B. Haarsma
High precision VLA flux density measurements for the lensed images of 0218+357 yield a time delay of 10:1 +1:5 \Gamma1:6 days (95% confidence). This is consistent with independent measurements...
Radio Frequency Spectra of 388 Bright 74 MHz Sources (2007)
Helmboldt, J. F., Kassim, N. E., Cohen, A. S., Lane, W. M., Lazio, T. J.
As a service to the community, we have compiled radio frequency spectra from the literature for all sources within the VLA Low Frequency Sky Survey (VLSS) that are brighter than 15 Jy at 74 MHz. Over...
The VLA Low-frequency Sky Survey (2007)
Cohen, A. S., Lane, W. M., Cotton, W. D., Kassim, N. E., Lazio, T. J. W., Perley, R. A., ...
The Very Large Array (VLA) Low-frequency Sky Survey (VLSS) has imaged 95% of the 3*pi sr of sky north of declination = -30 degrees at a frequency of 74 MHz (4 meter wavelength). The resolution is 80"...
The 74MHz System on the Very Large Array (2007)
Kassim, N. E., Lazio, T. J. W., Erickson, W. C., Perley, R. A., Cotton, W. D., Greisen, E. W., ...
The Naval Research Laboratory and the National Radio Astronomy Observatory completed implementation of a low frequency capability on the VLA at 73.8 MHz in 1998. This frequency band offers...
Cygnus A: A Long Wavelength Resolution of the Hot Spots (2006)
Lazio, T. J. W., Cohen, A. S., Kassim, N. E., Perley, R. A., Erickson, W. C., Carilli, C. L., ...
This paper presents observations of Cygnus A at 74 and 327 MHz at angular resolutions of approximately 10" and 3", respectively. These observations are among the highest angular resolutions obtained...
Posterior hypothalamic activation in paroxysmal hemicrania (2006)
Matharu, M.S., Cohen, A.S., Frackowiak, R.S.J., Goadsby, P.J.
Objective: Paroxysmal hemicrania (PH) is a severe, strictly unilateral headache that lasts 2 to 30 minutes, occurs more than five times daily, is associated with trigeminal autonomic symptoms, and is...
Cohen, A.S., Lezzar, K.E., Cole, J., Dettman, D., Ellis, G.S., Gonneea, M.E., ...
Microlaminated sediment cores from the Kalya slope region of Lake Tanganyika provide a near-annually resolved paleoclimate record between ~~2,840 and 1,420 cal. yr B.P. demonstrating strong linkages...
New results from the low-frequency counterpart of the XMM large scale structure survey (2006)
Tasse, C., Cohen, A.S., Röttgering, H.J.A., Kassim, N.E., Pierre, M., Perley, R., ...
New results from the low-frequency counterpart of the XMM large scale structure survey (2006)
Tasse, C., Cohen, A.S., Röttgering, H.J.A., Kassim, N.E., Pierre, M., Perley, R.A., ...
Resolving the Steep Spectrum Emission in the Central Radio Source in ZwCl 0735.7+7421 (2005)
Cohen, A. S., Clarke, T. E., Feretti, L., Kassim, N. E.
It has long been know that an extremely steep spectrum radio source lies at the center of ZwCl 0735.7+7421, a galaxy cluster with high X-ray luminosity and a cooling core. In this Letter, we present...
Posterior hypothalamic and brainstem activation in hemicrania continua (2004)
Matharu, M.S., Cohen, A.S., McGonigle, D.J., Ward, N., Frackowiak, R.S.J., Goadsby, P.J.
Objective.—To determine the brain structures involved in mediating the pain of hemicrania continua using positron emission tomography. Background: Hemicrania continua is a strictly unilateral,...
The rhenium–osmium (Re–Os) isotope system occupies a unique position amongst commonly used radiogenic parent–daughter isotope pairs on account of its siderophilic geochemical characteristics....
A deep, high-resolution survey at 74MHz. (2004)
Cohen, A.S., Rottgering, H.J.A., Jarvis, M.J., Kassim, N.E., Lazio, T.J.W.
A Deep, High-Resolution Survey at 74 MHz (2003)
Cohen, A. S., Rottgering, H. J. A., Jarvis, M. J., Kassim, N. E., Lazio, T. J. W.
We present a 74 MHz survey of a 165 square degree region located near the north galactic pole. This survey has an unprecedented combination of both resolution (25'' FWHM) and sensitivity (RMS noise...
The Low Frequency Radio Counterpart of the XMM Large Scale Structure Survey (2003)
Cohen, A. S., Röttgering, H. J. A., Kassim, N. E., Cotton, W. D., Perley, R. A., Wilman, R., ...
The XMM Large Scale Structure Survey (XMM-LSS) is a major project to map the large scale structure of the universe out to cosmological distances. An 8 degree by 8 degree region will be surveyed by...
The present study represents the continuation of past research on the driver's eye movement behavior. Previous experiments yield to describe the driver's eye movement behavior in terms of time...
Kassim, N. E., Clarke, T. E., Enßlin, T. A., Cohen, A. S., Neumann, D. M.
We present 74 MHz and 330 MHz VLA observations of Abell 754. Diffuse, halo-like emission is detected from the center of the cluster at both frequencies. At 330 MHz the resolution of 90''...
Cohen, A. S., Hewitt, J. N., Moore, C. B., Haarsma, D. B.
High precision VLA flux density measurements for the lensed images of 0218+357 yield a time delay of 10.1(+1.5-1.6)days (95% confidence). This is consistent with independent measurements carried out...
Negrini, Robert M., Erbes, Daniel B., Faber, Karin, Herrera, Adam M., Roberts, Andrew P., Cohen, Andrew S., ...
Effects of landscape Disturbances on Animal Communities in Lake Tanganyika, East Africa (1999)
Alin, S., Cohen, A.S., Bills, R., Gashagaza, M.M., Michel, A.E., Tiercelin, J.J., ...
This volume presents the results of two experiments: Driving on the Road and Observing the Traffic Circumstances in the Laboratory, both dealing with car driver's pattern of eye fixations. Further...
Lazio, T. J., Cohen, A. S., Crane, P. C., Weiler, K. W.
We consider the impact of potential LOFAR sites on the key astronomical projects set for the telescope. We compare the sites on the basis of the total fraction of the sky accessible and on the basis...
Low Surface Brightness Radio Structure in the Field of Gravitational Lens 0957+561 (1997)
Avruch, I. M., Cohen, A. S., Lehar, J., Conner, S. R., Haarsma, D. B., Burke, B. F.
We have produced deep radio maps of the double quasar 0957+561 from multiple-epoch VLA observations. To achieve high sensitivity to extended structure we have re-reduced the best available 1.6 GHz...
Friction of the Chapman double ball bearing /--by A. S. Cohen. (1908)
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1908.
Kinetics of phosphorothioate oligonucleotide metabolism in biological fluids.
Gilar, M, Belenky, A, Smisek, D L, Bourque, A, Cohen, A S
The in vitro stability and metabolism of GEM[91, a 25mer phosphorothioate antisense oligonucleotide complementary to the gag mRNA region of HIV-1, was investigated using capillary electrophoresis...
Method for phosphorothioate antisense DNA sequencing by capillary electrophoresis with UV detection.
Froim, D, Hopkins, C E, Belenky, A, Cohen, A S
The progress of antisense DNA therapy demands development of reliable and convenient methods for sequencing short single-stranded oligonucleotides. A method of phosphorothioate antisense DNA...
Cohen, A S, Najarian, D R, Paulus, A, Guttman, A, Smith, J A, Karger, B L
Picomole amounts of oligodeoxynucleotides [polydeoxyadenylic acids, (dA)40-60] were baseline resolved and analyzed in less than 8 min by high-performance capillary electrophoresis with polyacrylamide...
Cohen, A S, Moore, K A, Bangalore, R, Jafri, M S, Weinreich, D, Kao, J P
1. Standard intracellular recording techniques with 'sharp' micropipettes were used to evoke action potentials (APs) in acutely dissociated adult nodose neurones. 2. APs induced a transient increase...
Jones, L A, Skare, J C, Harding, J A, Cohen, A S, Milunsky, A, Skinner, M
Familial amyloidotic polyneuropathy (FAP) is associated with the deposition of an abnormal transthyretin (TTR) molecule. We have studied DNA from a family of Greek descent with FAP. The proband's TTR...
Kinetics of phosphorothioate oligonucleotide metabolism in biological fluids.
Gilar, M, Belenky, A, Smisek, D L, Bourque, A, Cohen, A S
The in vitro stability and metabolism of GEM[91, a 25mer phosphorothioate antisense oligonucleotide complementary to the gag mRNA region of HIV-1, was investigated using capillary electrophoresis...
Method for phosphorothioate antisense DNA sequencing by capillary electrophoresis with UV detection.
Froim, D, Hopkins, C E, Belenky, A, Cohen, A S
The progress of antisense DNA therapy demands development of reliable and convenient methods for sequencing short single-stranded oligonucleotides. A method of phosphorothioate antisense DNA...
Cohen, A S, Najarian, D R, Paulus, A, Guttman, A, Smith, J A, Karger, B L
Picomole amounts of oligodeoxynucleotides [polydeoxyadenylic acids, (dA)40-60] were baseline resolved and analyzed in less than 8 min by high-performance capillary electrophoresis with polyacrylamide...
Cohen, A S, Moore, K A, Bangalore, R, Jafri, M S, Weinreich, D, Kao, J P
1. Standard intracellular recording techniques with 'sharp' micropipettes were used to evoke action potentials (APs) in acutely dissociated adult nodose neurones. 2. APs induced a transient increase...
Jones, L A, Skare, J C, Harding, J A, Cohen, A S, Milunsky, A, Skinner, M
Familial amyloidotic polyneuropathy (FAP) is associated with the deposition of an abnormal transthyretin (TTR) molecule. We have studied DNA from a family of Greek descent with FAP. The proband's TTR...
Cathcart, E. S., Skinner, Martha, Cohen, A. S.
Human amyloid appears to contain two immunogenic components, the P (plasma) component and the F (fibril) component. Antisera to P component react with both autologous and homologous antigens by...
Cellular immunity in casein-induced amyloidosis
Cathcart, E. S., Mullarkey, M., Cohen, A. S.
Guinea-pigs receiving multiple subcutaneous injections of casein at first developed a cellular immune response to casein but this rapidly waned when the animals became amyloidotic. By contrast,...
Silverman, S. L., Cathcart, E. S., Skinner, Martha, Cohen, A. S.
To determine the role of inflammation in amyloidogenesis, we have studied the degradation of human serum amyloid A (SAA) protein by purified preparations of human blood polymorphonuclear leucocytes...
Serum amyloid A protein concentration in progressive systemic sclerosis (scleroderma).
Brandwein, S R, Medsger, T A, Skinner, M, Sipe, J D, Rodnan, G P, Cohen, A S
Serum amyloid A protein (SAA) concentrations were determined in 62 patients with progressive systemic sclerosis (PSS). Forty-seven patients had normal or slightly elevated SAA levels (less than 1000...
For determination of the intracellular site of synthesis and the pathways followed by amyloid protein AA, immunocytochemical localization of the anti-AA reactive substance was investigated in the...
Hepatic amyloidosis. A histopathologic analysis of primary (AL) and secondary (AA) forms.
Chopra, S., Rubinow, A., Koff, R. S., Cohen, A. S.
The liver is a major site of amyloid deposition. The spectrum of histopathologic changes in the liver was studied in 38 patients with systemic amyloidosis (25 with primary or myeloma-associated...
Redistribution of amyloid deposits.
After 21 daily subcutaneous injections of 0.5 ml 10% casein, CBA/J mice were left untreated and evaluated periodically for 6 months for the development of amyloid in spleens, livers, and kidneys. At...
Binding of serum amyloid P-component (SAP) by amyloid fibrils.
Pepys, M B, Dyck, R F, De Beer, F C, Skinner, M, Cohen, A S
Serum amyloid P-component (protein SAP) was found to bind in vitro to isolated amyloid fibrils of both primary and secondary types. The binding was strictly calcium-dependent, optimal uptake...
Shirahama, T., Skinner, M., Westermark, P., Rubinow, A., Cohen, A. S., Brun, A., ...
Three lesions that characterize the nosologic findings in the brain of Alzheimer's presenile dementia and senile dementia of Alzheimer type, ie, neuritic plaque, neurofibrillary tangle, and...
Intralysosomal formation of amyloid fibrils.
Unusual inclusions, which occurred in the reticuloendothelial cells intimately associated with fresh amyloid deposits, were analyzed by electron microscopy. The inclusions were located in the areas...