138 research outputs found
The effects of multipath propagation on the range measurement system at Fort Hunter Liggett
No full textNPS Hall of Fame author (Walt Haverstein) (Presented November 20, 2012)Instrumentation was developed for investigating the radio frequency link between the A station and the B unit in the Range Measurement System. Propagation effects are characterized using a multipath simulation in a laboratory environment. Field experiments were conducted to investigate the presence of a multipath environment at Ft. Hunter Liggett. The effects of varying the ambient temperature on the A station and the B unit were measuredApproved for public release; distribution is unlimited.Lieutenant Commander, Federal German NavyCaptain, United States Marine Corpshttp://archive.org/details/theeffectsofmult109451809
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Nonlinear semigroup theory for systems
No full textThe abstract Cauchy problem in a B-space is considered. Under certain conditions, and with use of the Generation Theorem of Crandall and Liggett (Am. J. Math., 93, 265-298 (1971)), the finite difference problem has a unique solution on (0,infinity). The author works here to extend the application of the Crandall-Liggett theorem to two conservation laws with linear coupling. (RWR
Pharmacogenetics of ophthalmic topical β-blockers
No full textGlaucoma is the second leading cause of blindness worldwide. The primary glaucoma risk factor is elevated intraocular pressure. Topical β-blockers are affordable and widely used to lower intraocular pressure. Genetic variability has been postulated to contribute to interpersonal differences in efficacy and safety of topical β-blockers. This review summarizes clinically significant polymorphisms that have been identified in the β-adrenergic receptors (ADRB1, ADRB2 and ADRB3). The implications of polymorphisms in CYP2D6 are also discussed. Although the candidate-gene approach has facilitated significant progress in our understanding of the genetic basis of glaucoma treatment response, most drug responses involve a large number of genes, each containing multiple polymorphisms. Genome-wide association studies may yield a more comprehensive set of polymorphisms associated with glaucoma outcomes. An understanding of the genetic mechanisms associated with variability in individual responses to topical β-blockers may advance individualized treatment at a lower cost
From young adult beginning pianist to a professional career in music
No full textThis paper deals with the problems facing the late beginning piano student (at least eighteen-years-of-age) who desires to pursue a career in music. Psychological and neurological factors as they relate to the late beginner's predicted chances for success are discussed. The point is made by the author, who was also a late beginner, that beginning music study beyond the traditionally accepted age does not necessarily preclude a talented individual from his desired goal. Scientific evidence, as well as the author's successful completion of his graduate recital, are offered as indications of the validity of his conclusions.California State University, Northridge. Department of Music.Includes recorded audio files in WAV and MP3 formats, 33:59 in length
Limit Set Of A Weakly Supercritical Contact Process On A Homogeneous Tree
No full text. A conjecture of Liggett [9] concerning the regime of weak survival for the contact process on a homogeneous tree is proved. The conjecture is shown to imply that the Hausdorff dimension of the limit set of such a contact process is no larger than half the Hausdorff dimension of the space of ends of the tree. The conjecture is also shown to imply that at the boundary between weak survival and strong survival, the contact process survives only weakly, a theorem previously proved by Zhang [14]. Finally, a stronger form of a theorem of Hawkes and Lyons concerning the Hausdorff dimension of a Galton-Watson tree is proved. 1. Introduction This paper concerns the growth of an isotropic contact process on an infinite homogeneous tree. The process was introduced by Pemantle [12], and discussed at some length by Liggett in the 1996 Wald Memorial Lectures [9] (see also [10]). An isotropic contact process on the homogeneous tree T = T d of degree d+1 is a continuous time Markov process A t on t..
Toward A Conceptualization of Democratic Leadership in a Professional Context
No full textIn this article, an argument is advanced with a view to establishing the central principles and premises upon which democratic leadership in school contexts is based. These principles are derived from the findings of a study on the professional leadership culture of one school conducted by this author. The initial study was a qualitative case study that examined, through Schein’s (2010) organizational culture and leadership model, the perceptions of school-level professionals regarding the nature of their professional leadership culture. Numerous findings with rich implications for democratic leadership in professional contexts emerged from the study. Based on these findings, I propose a conceptualization of democratic leadership and suggest ten strategies for its use in school contexts. Finally, I examine possibilities for the development of democratic leadership capacity in school contexts.
A reconnaissance space sensing investigation of crustal structure for a strip from the eastern Sierra Nevada to the Colorado Plateau
No full textThe author has identified the following significant results. Research progress in an investigation using ERTS-1 MSS imagery to study regional tectonics and related natural resources is summarized. Field reconnaissance guided by analysis of ERTS-1 imagery has resulted in development of a tectonic model relating strike-slip faulting to crustal extension in the southern Basin Range Province. The tectonics of the northern Death Valley-Furnace Creek Fault Zone and spacially associated volcanism and mercury mineralization were also investigated. Field work in the southern Sierra Nevada has confirmed the existence of faults and diabase dike swarms aligned along several major lineaments first recognized in ERTS-1 imagery. Various image enhancement and analysis techniques employed in the study of ERTS-1 data are summarized
A reconnaissance space sensing investigation of crustal structure for a strip from the eastern Sierra Nevada to the Colorado Plateau
No full textThe author has identified the following significant results. Studies were conducted in key field areas in the Sierra Nevada, the Basin Range Province and the Colorado Plateau to evaluate the origins and significance of geologic and structural anomalies expressed in the ERTS-1 data. The investigation included development of image enhancement and analysis techniques and comparison of remote sensing data available over the test site. The ERTS-1 MSS imagery has proven to be an effective tool for studying the interrelationsships between Cenozoic tectonic patterns and the distributions of Cenozoic plutonism and volcanism, seismic activity, geologic hazards, and known mineral, geothermal and ground water resources. Recommendations are made for applications of ERTS-1 data to natural and resource exploration and management
From young adult beginning pianist to a professional career in music
No full textIncludes recorded audio files in WAV and MP3 formats, 33:59 in length.This paper deals with the problems facing the late beginning piano student (at least eighteen-years-of-age) who desires to pursue a career in music. Psychological and neurological factors as they relate to the late beginner's predicted chances for success are discussed. The point is made by the author, who was also a late beginner, that beginning music study beyond the traditionally accepted age does not necessarily preclude a talented individual from his desired goal. Scientific evidence, as well as the author's successful completion of his graduate recital, are offered as indications of the validity of his conclusions
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