680,343 research outputs found
Fredholm Operators and Einstein Metrics on Conformally Compact Manifolds
The main purpose of this monograph is to give an elementary and
self-contained account of the existence of asymptotically hyperbolic Einstein
metrics with prescribed conformal infinities sufficiently close to that of a
given asymptotically hyperbolic Einstein metric with nonpositive curvature. The
proof is based on an elementary derivation of sharp Fredholm theorems for
self-adjoint geometric linear elliptic operators on asymptotically hyperbolic
manifolds.Comment: Latex; 83 + vi pages. Fixed an error in the proof of Lemma 3.7(b
Mission Santa Clara in a Changing Urban Environment
Since its secularization in the 1830s, Mission Santa Clara de Asís and its associated grounds have seen major transformations. These changes include the gradual abandonment of the mission by its native inhabitants, the Californio and early Anglo-American use of mission structures, as well as the founding and growth of Santa Clara College (now Santa Clara University) and the City of Santa Clara. Through the analysis of historic maps, photographs, and archaeological findings, this paper provides an overview of the far-reaching physical changes that have fundamentally altered the original mission-era landscape, including the mission churches, cemeteries, and neophyte village. Information is drawn from historical and archaeological investigations into the lives of Native Americans at Mission Santa Clara, as well as an ongoing project I am conducting with undergraduate students and faculty from the departments of Anthropology and Environmental Studies and Sciences to record historic structures and other features in a geographic information system, or GIS. The massive scale of landscape changes over the past two centuries provide important context from which to consider the implications of future development on the preservation and study of the physical remnants of Mission Santa Clara
Contactless pellet fabrication
A small object is coated by holding it in the pressure well of an acoustic standing wave pattern, and then applying a mist of liquid coating material at low velocity into the pressure well. The pressure gradient within the well forces the mist particles to be pushed against the object. A lower frequency acoustic wave also can be applied to the coated object, to vibrate it so as to evenly distribute the coated material. The same lower frequency vibrations can be applied to an object in the shape of a hollow sphere, to center the inner and outer surfaces of the sphere while it remains suspended
Apparatus for production of ultrapure amorphous metals utilizing acoustic cooling
Amorphous metals are produced by forming a molten unit of metal and deploying the unit into a bidirectional acoustical levitating field or by dropping the unit through a spheroidizing zone, a slow quenching zone, and a fast quenching zone in which the sphere is rapidly cooled by a bidirectional jet stream created in the standing acoustic wave field produced between a half cylindrical acoustic driver and a focal reflector or a curved driver and a reflector. The cooling rate can be further augmented first by a cryogenic liquid collar and secondly by a cryogenic liquid jacket surrounding a drop tower. The molten unit is quenched to an amorphous solid which can survive impact in a unit collector or is retrieved by a vacuum chuck
U-health expert system with statistical neural network
Ubiquitous Health(U-Health) system witch focuses on automated applications that can provide healthcare to human anywhere and anytime using wired and wireless mobile technologies is becoming increasingly important. This system consists of a network system to collect data and a sensor module which measures pulse, blood pressure, diabetes, blood sugar, body fat diet with management and measurement of stress etc, by both wired and wireless and further portable mobile connections. In this paper, we propose an expert system using back-propagation to support the diagnosis of citizens in U-Health system
Nurses\u27 Perceptions of Structural Empowerment: A Practice Review Process Pilot
Nurses are professionally and morally obliged to monitor and evaluate nursing practice via active participation in review mechanisms that are designed to promote patient safety and care delivery, thereby improving patient care quality (American Nurses Association [ANA], 1988, 2001, 2004; O\u27Rourke, 2006). The purpose of this Doctor of Nursing Practice (DNP) project was to develop, pilot, and evaluate a nurse practice review process with frontline nurses within Fresno Heart & Surgical Hospital (FHSH), a small specialty hospital, affiliated with Community Medical Centers (CMC) in Fresno, California. A nurse practice algorithm was subsequently developed and structural empowerment was assessed with the Conditions of Work Effectiveness Questionnaire-II (CWEQ-II) (Laschinger, Finegan, Shamian, & Wilk, 2001). While there was a small sample size, the DNP project evaluation demonstrated that frontline nurses want to participate in improvement activities within the facility and believed the nurse practice review algorithm would effectively monitor and evaluate nursing practice
Studies of cycles for liquid-metal magnetohydrodynamic generation of power
Studies of liquid-metal magnetohydrodynamic power cycles indicate that the overall efficiency of a binary cycle, employing a liquid-metal topping cycle and a bottoming steam cycle, may reach 60 percent. Details of analyses and data on cycles are presented, and the commercial potential of the binary cycle is discussed
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