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| Author | : Canada. Patent Office |
| Publisher | : |
| Total Pages | : 1458 |
| Release | : 1905 |
| Genre | : Copyright |
| ISBN | : |
| Author | : Bryan Peterson |
| Publisher | : Amphoto Books |
| Total Pages | : 178 |
| Release | : 2016-03-15 |
| Genre | : Photography |
| ISBN | : 1607748517 |
This newly revised edition of Bryan Peterson's most popular book demystifies the complex concepts of exposure in photography, allowing readers to capture the images they want. Understanding Exposure has taught generations of photographers how to shoot the images they want by demystifying the complex concepts of exposure in photography. In this newly updated edition, veteran photographer Bryan Peterson explains the fundamentals of light, aperture, and shutter speed and how they interact with and influence one another. With an emphasis on finding the right exposure even in tricky situations, Understanding Exposure shows you how to get (or lose) sharpness and contrast in images, freeze action, and take the best meter readings, while also exploring filters, flash, and light. With all new images, as well as an expanded section on flash, tips for using colored gels, and advice on shooting star trails, this revised edition will clarify exposure for photographers of all levels.
| Author | : National Research Council (U.S.). Advisory Committee to the Air Force Systems Command |
| Publisher | : |
| Total Pages | : 456 |
| Release | : 1968 |
| Genre | : Electron optics |
| ISBN | : |
| Author | : R. C. Hansen |
| Publisher | : Academic Press |
| Total Pages | : 463 |
| Release | : 2014-05-10 |
| Genre | : Technology & Engineering |
| ISBN | : 1483260631 |
Microwave Scanning Antennas, Volume I: Apertures is a comprehensive account of phased arrays, multiple beam arrays, time domain and synthetic apertures, and adaptive antennas. Advances in continuous apertures and near field theory are discussed. Low noise and monopulse apertures, optical scanners, and large radomes are also covered, along with radio astronomy instruments and associated theory. Comprised of five chapters, this volume begins with an overview of aperture theory as well as aperture distributions and near field theory. The second and third chapters deal with mechanically steered and electronically scanned antennas, including monopulse antennas and optical scanners. The fourth chapter is devoted to radio astronomy instruments and techniques and encompasses both apertures and arrays, together with radio telescopes and antennas. The final chapter describes large radomes that are primarily used with aperture antennas. This book is intended for engineers who must understand narrow beam or high resolution antennas more deeply than from the system interfaces alone, and for undergraduate and graduate students in electronics who wish to complement their study of electromagnetics with the quantitative details of hardware applications.
| Author | : Kenneth W. Kennedy |
| Publisher | : |
| Total Pages | : 48 |
| Release | : 1966 |
| Genre | : Aeronautics |
| ISBN | : |
The report presents data on (1) the optimal sizes and locations of maintenance apertures, and (2) man's working-reach distances through such apertures, for both the shirt-sleeved and the pressure-suited conditions. In all cases, the vertical dimension of the aperture permits the technician to maintain simultaneous visual and manual contact with the task area. Data include Depth of Reach, Breadth of Aperture, Vertical Dimension of Aperture, and distances to the floor from both the lower and the upper edges of these apertures. Different apertures provide for forward or lateral reaches, in the standing or seated position, with one or both arms. Data are reported in the 5th, 25th, 50th, 75th and 95th percentiles. Ranges, Means and Standard Deviations are given. Recommendations are made regarding the appropriate application of maintenance accesses. (Author).
| Author | : Matt Rasmussen |
| Publisher | : LSU Press |
| Total Pages | : 72 |
| Release | : 2013-05-13 |
| Genre | : Poetry |
| ISBN | : 0807150886 |
In his moving debut collection, Matt Rasmussen faces the tragedy of his brother's suicide, refusing to focus on the expected pathos, blurring the edge between grief and humor. In "Outgoing," the speaker erases his brother's answering machine message to save his family from "the shame of dead you / answering calls." In other poems, once-ordinary objects become dreamlike. A buried light bulb blooms downward, "a flower / of smoldering filaments." A refrigerator holds an evening landscape, "a tinfoil lake," "vegetables / dying in the crisper." Destructive and redemptive, Black Aperture opens to the complicated entanglements of mourning: damage and healing, sorrow and laughter, and torment balanced with moments of relief.
| Author | : Royal Physical Society of Edinburgh |
| Publisher | : |
| Total Pages | : 638 |
| Release | : 1912 |
| Genre | : Natural history |
| ISBN | : |
| Author | : Donald R. Rhodes |
| Publisher | : |
| Total Pages | : 16 |
| Release | : 1971 |
| Genre | : Antennas (Electronics) |
| ISBN | : |
| Author | : Trevor S. Bird |
| Publisher | : John Wiley & Sons |
| Total Pages | : 446 |
| Release | : 2016-01-19 |
| Genre | : Technology & Engineering |
| ISBN | : 1118923561 |
This book is intended as an advanced text for courses in antennas, with a focus on the mature but vital background field of aperture antennas. The book is aimed at final year, MSc, PhD and Post-Doctoral students, as well as readers who are moving from academia into industry, beginning careers as wireless engineers, system designers, in R&D, or for practising engineers. It assumes the reader has undertaken an earlier course of study on Maxwell's equations, fields and waves. Some of these topics are summarised in the early few chapters in order to provide continuity and background for the remaining chapters. The aperture antennas covered include the main types of horns, reflectors and arrays as well as microstrip patches, reflectarrays and lenses. To provide more than a superficial treatment of arrays, the topic of mutual coupling is covered in greater detail than most similar books in the area. Also included is an introduction to arrays on non-planar surfaces, which is of importance for applications that involve curved surfaces such as in aerodynamics or for making aperture antennas unobtrusive. A chapter is included on some modern aperture antennas to illustrate design techniques beyond the most common types of aperture antennas described in the early chapters. This is to show where advances have recently been made and where they could be improved in the future. Also included are selected topics of a practical nature for aperture antennas, namely fabrication and measurement.
| Author | : Abdallah Mohamed Hamed |
| Publisher | : Springer Nature |
| Total Pages | : 106 |
| Release | : 2023-12-16 |
| Genre | : Science |
| ISBN | : 3031475526 |
This book serves as a valuable resource for researchers and graduate students specializing in optical engineering and optical sciences. Comprising three distinct parts, it addresses fundamental aspects and practical applications of modulated apertures in microscopy. The first part delves into the fabrication of modulated apertures and the computation of impulse responses or point spread functions (PSFs). It offers essential insights into the foundational concepts of modulated aperture design. The second part focuses on the utilization of modulated apertures in speckle imaging, elucidating their significance and relevance in this context. This section provides a comprehensive understanding of the practical applications of modulated apertures in image formation. The third and final part explores the application of modulated apertures within the framework of a confocal scanning laser microscope. The objective here is to enhance microscope resolution and image contrast, contributing to the advancement of microscopy techniques. This book offers a concise and objective exploration of modulated apertures' fabrication, applications, and their potential to enhance microscopy. This book is a valuable reference for students and researchers seeking to deepen their knowledge in this specialized field.
