From 1918 to 1929 American aviation progressed through the pioneering era, establishing the pattern of its impact on national security, commerce and industry, communication, travel, geography, and international relations. In America, as well as on a global basis, society experienced a dramatic transformation from a two-dimensional world to a three-dimensional one. By 1929 aviation was poised at the threshold of a new epoch. Covering both military and civil aviation trends, Roger Bilstein's study highlights these developments, explaining how the pattern of aviation activities in the 1920s is reflected through succeeding decades. At the same time, the author discusses the social, economic, and political ramifications of this robust new technology. Aviation histories usually pay little attention to aeronautical images as an aspect of popular culture. Thoughtful observers of the 1920s such as Stuart Chase and Heywood Broun considered aircraft to be an encouraging example of the new technology-workmanlike, efficient, and graceful, perhaps representing a new spirit of international good will. Flight Patterns is particularly useful for its discussion of both economic and cultural factors, treating them as integrated elements of the evolving air age.
Environmental conditions change considerably in the course of 24 h with respect to abiotic factors and intra- and interspecific interactions. These changes result in limited time windows of opportunity for animal activities and, hence, the question of when to do what is subject to fitness maximisation. This volume gives a current overview of theoretical considerations and empirical findings of activity patterns in small mammals, a group in which the energetic and ecological constraints are particularly severe and the diversity of activity patterns is particularly high. Following a comparative ecological approach, for the first time activity timing is consequently treated in terms of behavioural and evolutionary ecology, providing the conceptual framework for chronoecology as a new subdiscipline within behavioural ecology. An extensive Appendix gives an introduction to methods of activity modelling and to tools for statistical pattern analysis.
Since 1955 when Dr. Paul Kirk first presented a bloodstain evidence affidavit in State of Ohio v. Samuel Sheppard, expert testimony on bloodstain interpretation has gained wide acceptance in U.S. courts. Scientific and Legal Applications of Bloodstain Pattern Interpretation brings together some of the most respected and noted experts in forensic science, the law, and bloodstain interpretation to provide a comprehensive overview of the discipline. It discusses research, applications, and the current view of bloodstain pattern interpretation within the legal system at the trial and appellate court levels, as well as scientific approaches and developments in the field. Scientific and Legal Applications of Bloodstain Pattern Interpretation will help attorneys who are questioning and cross-examining expert witnesses have a good working knowledge of bloodstain interpretation. Included is a full-color atlas of bloodstains, in conjunction with a glossary of terms and an outline of basic laboratory experiments that are commonly used in the discipline. Among the outstanding contributions in this volume you will find: An excellent chapter by Carol Henderson discusses the legal and ethical aspects of bloodstain pattern evidence in detail. A post-conviction analysis by Marie Elena Saccoccio evaluates how bloodstain evidence can play a role in the appeal process. Misinterpretation and overinterpretation of bloodstain evidence can occur in our courts of law-be prepared to effectively analyze the evidence and the testimony with Scientific and Legal Applications of Bloodstain Pattern Interpretation.
The paper is organized as follows: In section 2, we describe the no- orientation-discontinuity interfering model based on a Gaussian stochastic model in analyzing the properties of the interfering strokes. In section 3, we describe the improved canny edge detector with an ed- orientation constraint to detect the edges and recover the weak ones of the foreground words and characters; In section 4, we illustrate, discuss and evaluate the experimental results of the proposed method, demonstrating that our algorithm significantly improves the segmentation quality; Section 5 concludes this paper. 2. The norm-orientation-discontinuity interfering stroke model Figure 2 shows three typical samples of original image segments from the original documents and their magnitude of the detected edges respectively. The magnitude of the gradient is converted into the gray level value. The darker the edge is, the larger is the gradient magnitude. It is obvious that the topmost strong edges correspond to foreground edges. It should be noted that, while usually, the foreground writing appears darker than the background image, as shown in sample image Figure 2(a), there are cases where the foreground and background have similar intensities as shown in Figure 2(b), or worst still, the background is more prominent than the foreground as in Figure 2(c). So using only the intensity value is not enough to differentiate the foreground from the background. (a) (b) (c) (d) (e) (f)