Citations Only: Recent submissions
Now showing items 41-60 of 990
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Non-adiabatic transition of beams in gyrotrons through various magnetic field profiles
(Taylor & Francis, 1991)The achievement of efficiency enhancement in small-orbit gyrotrons by using depressed collector techniques requires precisely configured magnetic field profiles which present adiabatic as well as non-adiabatic transitions ... -
Dynamic environmental policy in developing countries with a dual economy
(Elsevier. The definitive version can be found at http://www.elsevier.com/locate/, 2002)We analyze a dynamic model of environmental policy in a stylized developing country (DC) with a dual economy. This DC’s economy is distorted in part because the government subsidizes the exports of the non-polluting ... -
Aspects of the theory of environmental policy in developing countries
(Taylor and Francis. The definitive copy can be found at http://www.tandf.co.uk/journals/default.asp., 2002)We study two issues relating to the conduct of environmental policy in developing countries (DCs). First, when faced with a self-financing constraint, should an environmental authority (EA) raise/lower pollution taxes ... -
On the extinction of species in jointly determined stochastic systems
(Taylor and Francis. A definitive copy can be found at http://www.tandf.co.uk/journals, 2000)The sizable literature 0n extinction in economics has paid scant attention to the problem of constructing measures of species extinction. Moreover, this literature has not studied the question of species extinction in ... -
Human actions, the survival of keystone specise, and the resilience of ecological-economic systems
(Elsevier. The definitive version can be found at http://www.elsevier.com/locate/resourpol, 2002)Human (managerial) actions affect the survival probabilities of the keystone species of an ecological-economic system. What are the theoretical connections between human actions, keystone species survival, and the resilience ... -
Aspects of ecosystem persistence and the optimal conservation of species
(Elsevier. The definitive version can be found at http://www.elsevier.com, 2000)Although ecologists have long recognized the salience of persistence in determining the static and the dynamic behavior of ecological systems, it is only very recently that economists have begun to study this concept in ... -
An Interdisciplinary research agenda for the study of ecological-economic systems in the American West
(Elsevier. The definitive version can be found at http://www.elsevier.com/locate/resourpol, 2000)Increased public awareness off resource management issues and new attitudes toward resource conservation have led to great interest in the subject of the apposite use and management of natural and environmental resources ... -
On temporal controls and the stochastic behavior of renewable natural resources
(Elsevier. The definitive version can be found at http://www.elsevier.com/locate/resourpol, 2002)This paper provides a theoretical analysis of the effects of temporal controls on the stochastic behavior of renewable natural resources such as fisheries and rangelands. First, we show that temporal resource management ... -
An Analysis of persistence, resilience, and the conservation of keystone species
(Elsevier. The definitive version can be found at http://www.elsevier.com/locate/, 2000)Ecologists and economists are increasingly in agreement that ecological and economic systems are linked and that these systems should be viewed as one system. However, because this recognition has been recent, there are ... -
From linearity towards chaos: Basic studies of relativistic backward-wave oscillators
(American Physical Society, 1992-09-14)Recent experimental studies have revealed for the first time some basic features of pulsed. relativistic (300-600 keY) backward-wave oscillators such as starting current, axial mode locking, and multifrequency operation. ... -
Experimental and numerical results on a millimeter-wave free electron laser amplifier
(Elsveier - Nuclear instruments and methods in physics research, 1993-07)Progress in studies of a millimeter-wave free electron laser amplifier based on a small period planar wiggler and a sheet electron beam is reported. Successful propagation of a 15 A sheet electron beam has been accomplished ... -
High accuracy imaging polarimetry with NICMOS
(Astronomical Polarimetry, 2009)The ability of NICMOS to perform high accuracy polarimetry is currently hampered by an uncalibrated residual instrumental polarization at a level of 1.2 - 1.5%. To better quantify and characterize this residual we obtained ... -
New modes in a plasma with periodic boundaries: the origin of the dense spectrum
(The American Physical Society, 1991-10-28)We analyze the new features of the low-frequency (£0 < £Op) modes of wave propagation in a plasma filled, spatially periodic structure. The spectrum of these modes is drastically modified by the periodic boundaries in a ... -
A High-average power tapered FEL amplifier at submillimeter frequencies using sheet electron beams and short-period wigglers
(Elsevier, 1990-09-17)A high-average-power FEL amplifier operating at submillimeter frequencies is under development at the University of Maryland. Program goals are to produce a CW, ~ 1 MW, FEL amplifier source at frequencies between 280 GHz ... -
Laboratory Simulation of Artificial Plasma Clouds in the Ionosphere
(American Geophysical Union, 1973)The results of an experiment to model the behavior of artificial plasma clouds in the ionosphere are presented. The formation of field-aligned structure or striations is frequently observed. The appearance of this structure ... -
Nonstationary behavior of collisionless shocks
(American Physical Society, 1972-01-03)Laboratory measurements indicate that a collisionless shock wave formed in a plasma-wind- tunnel device is nonstationary on the time scale of the ion gyroperiod. This behavior suggests a possible interpretation of recent ... -
On the optimal management of a class of aquatic ecological-economic systems
(Elsevier Science. The definitive version can be found at http://www.elsevier.com/locate/dsw, 2001)This paper studies aquatic ecological-economic systems such as the Chesapeake Bay. The stability of such ecological-economic systems depends on the successful functioning of a small number of generalist species in a wide ... -
The Stability of stochastic systems: The Case of persistence and resilience
(Elsevier. The definitive version is available at http://www.elsevier.com, 1999)Beginning with the seminal work of Arrow and Hurwicz[1], there now exists a vast literature in economics on the stability of economic systems. This notwithstanding, to the best of our kno2wledge, the economics literature ... -
Near-millimeter free electron lasers with small period wigglers and sheet electron beams
(Elsevier, 1988-10)Electron cyclotron resonance heating (ECRH) of plasmas in magnetic fusion research and space-borne radar systems are both projected to require high power radiation sources at wavelength λ not, vert, similar 1 mm. For ECRH, ... -
First operation of a 94 GHz, sheet beam, FEL amplifier
(Elsevier, 2002-10-14)Millimeter wave (94 GHz) amplification has been observed in the sheet beam, planar wiggler, free electron laser. Using a 4 A sheet beam (20 mm × 1.0 mm) at an electron energy of 530 keV, injected wave power of 5 W was ...