Development of a takeoff performance monitoring system

The development and testing of a real-time takeoff performance monitoring system is discussed. The algorithm is madeup of two segments: a pretakeoff segment and a real-time segment. One-time inputs of ambient conditions and airplane configuration information are used in the pretakeoff segment to generate schedule performance data for that takeoff. The real-time segment uses the scheduled performance data generated in the pretakeoff segment, runway length data, and measured parameters to monitor the performance of the airplane throughout the takeoff roll. Airplane and engine performance deficiencies are detected and annunciated. An important feature of this algorithm is the one-time estimation of the runway rolling friction coefficient. The algorithm was tested using a six degree of freedom airplane model in a computer simulation. Results from a series of sensitivity analysis are also included

Charged particle radiation damage in semiconductors. XII - Effects of high energy electrons in silicon and silicon solar cells Final technical report, 26 May 1965 - 26 May 1966

Electron bombardment effects on silicon and silicon solar cell

Development of a sensitivity analysis technique for multiloop flight control systems

This report presents the development and application of a sensitivity analysis technique for multiloop flight control systems. This analysis yields very useful information on the sensitivity of the relative-stability criteria of the control system, with variations or uncertainties in the system and controller elements. The sensitivity analysis technique developed is based on the computation of the singular values and singular-value gradients of a feedback-control system. The method is applicable to single-input/single-output as well as multiloop continuous-control systems. Application to sampled-data systems is also explored. The sensitivity analysis technique was applied to a continuous yaw/roll damper stability augmentation system of a typical business jet, and the results show that the analysis is very useful in determining the system elements which have the largest effect on the relative stability of the closed-loop system. As a secondary product of the research reported here, the relative stability criteria based on the concept of singular values were explored

Three-Dimensional Crystallographic Reconstruction for Atomic Resolution

Three-dimensional structures have recently been determined by electron crystallography at a resolution high enough to determine atomic arrangements in both protein and mineral specimens. The different nature of these two types of specimens produces some very significant differences in the way data is obtained and processed, although the principles are the same. The sensitivity of proteins to damage by the electron beam limits the signal-to-noise ratio in the image and the resolution to which data can be extracted from the image. A number of constraints, such as the amino acid sequence and the connectivity of atoms within amino acids, can be used in interpreting the limited image data. In materials samples, the relative insensitivity to damage allows obtaining resolution limited only by the microscope. In many samples, dynamical scattering and other non-linear effects limit the information in the image, but this limit can be circumvented by working in very thin areas of the specimen

Cognitive therapy and spirituality: the battleground and the blend

Includes bibliographical references

Perfect State Transfer: Beyond Nearest-Neighbor Couplings

In this paper we build on the ideas presented in previous works for perfectly transferring a quantum state between opposite ends of a spin chain using a fixed Hamiltonian. While all previous studies have concentrated on nearest-neighbor couplings, we demonstrate how to incorporate additional terms in the Hamiltonian by solving an Inverse Eigenvalue Problem. We also explore issues relating to the choice of the eigenvalue spectrum of the Hamiltonian, such as the tolerance to errors and the rate of information transfer.Comment: 8 pages, 2 figures. Reorganised, more detailed derivations provided and section on rate of information transfer adde

New multivariable capabilities of the INCA program

The INteractive Controls Analysis (INCA) program was developed at NASA's Goddard Space Flight Center to provide a user friendly, efficient environment for the design and analysis of control systems, specifically spacecraft control systems. Since its inception, INCA has found extensive use in the design, development, and analysis of control systems for spacecraft, instruments, robotics, and pointing systems. The (INCA) program was initially developed as a comprehensive classical design analysis tool for small and large order control systems. The latest version of INCA, expected to be released in February of 1990, was expanded to include the capability to perform multivariable controls analysis and design

Some aspects of the presentation of industrial relations and race relations in some major British news media

Firstly, the social functions of mass media are analysed, with critical assessment of some significant sociological and psychological literature on mass communication and related topics. It is concluded they operate principally to maintain definitional social categories in the context of change and to sustain a given level of public discussion. Secondly, leading theories of race relations and industrial relations are analysed critically; it is concluded that different theoretical approaches, typically applying to different levels of analysis, tend to be mutually contributive, not exclusive. Both sets of relationships are then briefly compared and contrasted. The nature of racial and industrial conflict in contemporary Britain is then surveyed, with reference to dominant perceptions of the situation and the objective character of these conflicts. Next, content analysis as a research technique is discussed, and the precise methods employed in this study axe described. Selected television and press coverage of the 1970 docks strike is then analysed, with a particular focus on levels of explanation, the degree of public participation in discussion, and the definitions provided of the situation. Certain related data are appended. The same task is subsequently performed in relation to immigration, domestic race relations, the sale of arms to South Africa, and some other topics. Certain related data are appended. Finally, these data are placed in their sociological context in Britain, by integrating them with an analysis of the social construction of consensus in that society. After discussion of certain theories interrelating culture and social divisions, together with analysis of certain institutions bearing on the construction of consensus, the particular role of the British news media, and the special functions of British ideologies of nationalism and objectivity, are surveyed. Conclusions for the relation between consensus and conflict in modern Britain are then stated

Improving Palliative Care with Deep Learning

Improving the quality of end-of-life care for hospitalized patients is a priority for healthcare organizations. Studies have shown that physicians tend to over-estimate prognoses, which in combination with treatment inertia results in a mismatch between patients wishes and actual care at the end of life. We describe a method to address this problem using Deep Learning and Electronic Health Record (EHR) data, which is currently being piloted, with Institutional Review Board approval, at an academic medical center. The EHR data of admitted patients are automatically evaluated by an algorithm, which brings patients who are likely to benefit from palliative care services to the attention of the Palliative Care team. The algorithm is a Deep Neural Network trained on the EHR data from previous years, to predict all-cause 3-12 month mortality of patients as a proxy for patients that could benefit from palliative care. Our predictions enable the Palliative Care team to take a proactive approach in reaching out to such patients, rather than relying on referrals from treating physicians, or conduct time consuming chart reviews of all patients. We also present a novel interpretation technique which we use to provide explanations of the model's predictions.Comment: IEEE International Conference on Bioinformatics and Biomedicine 201

Agora:A Marketplace of Voice, Data, and Video Technologies

The Information Superhighway continues to be a desirable, but elusive, goal for many organizations. While the concept isattractive, information system professionals are encountering numerous obstacles in their attempts to merge and use voice, data, and video technologies. This paper outlines those obstacles, and then presents results from a case study of an organization which has experienced early success in its attempt to overcome them. Lessons drawn from this organization\u27s planning and implementation process are discussed