1,662 research outputs found
Heat Transfer to Sprays and Flowing Gases
No full textTitle: Heat Transfer to Sprays and Flowing Gases, Author: Kenneth G. Pollock, Location: ThodeAn experimental investigation of an Atomized Suspension Technique
system was carried out in an experimental apparatus of semi-pilot plant
scale. The complex gas flow patterns which occur in such systems as the
result of the interaction of natural convection and forced convection
prevented a quantitative analysis of the system. The problem was then approached by dividing the overall process into
a number of idealized studies; these were convection in the entrance region,
radiation to a gas, radiation to a cloud of droplets. A theoretical model was developed to predict heat-transfer rates
and gas temperature profiles in the entrance region (x/D < 2) of a
cylindrical coolumn. The model was verified experimentally. A theoretical gas- radiation model was developed using the zoning
technique of Hottel. Experimental gas-temperature measurerrents qualitatively
verified the model. An investigation of the established immersion cell technique for
the determination of drop-size distributions in sprays indicated that
this technique could not be used with any confidence in systems where
the spray is moving at low velocities. Several experimental devices and techniques were developed
throughout the course of this study.ThesisDoctor of Philosophy (PhD
Interview with Jaroslav Pelikan, theologian
No full textJaroslav Pelikan was professor of religious studies at Yale University at the time of this interview. Author of From Luther to Kierkegaard, Obedient Rebels, The Christian Intellectual and Sprit Versus Structure, Pelikan discusses the problem of Christianity as a viable institution in twentieth-century American society. Interviewed by Kenneth G. Hagen, Ted Guzie, S.J., and Meredith Watts.GrayscaleSoun
Comparison of walleye pollock target strength estimates determined from in situ measurements and calculations based on swimbladder form
No full textAuthor Posting. © Acoustical Society of America, 1988. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 83 (1988): 9-17, doi:10.1121/1.396190.The target strength of walleye pollock (Theragra chalcogramma) at 38 kHz has been determined in each of two ways: (1) in situ measurement with dual‐beam and split‐beam echo sounders, and (2) theoretical calculation based on the swimbladder form. Respective probability density functions of target strength are compared. The several estimates of mean target strength (T̄S̄) determine the relation T̄S̄=20 log l−66.0, where l is the fish fork length in centimeters
Stage-Structured Tag-Return and Capture-Recapture Models
No full textEcologists and conservation biologists have had an increasing interest in landscapeecology, fragmentation and meta-population structures and dynamics for endangered or threatened species of wildlife (Nichols et al. 1992).They have realized the need for parameter estimates to use in the multi-state models;and have tried estimation of transitionprobabilities among stages using tag-return and capture-recapture models. Thesetransition probabilities are composed of survival and movement rates andcan only be estimated separately when an additional assumption is made(Brownie et al. 1993) that movement occurs at the end of theinterval between time + 1.We generalize this workto allow different movement patterns in the intervalfor multiple tag-recovery and capture-recapture experiments.
With methods of separating survival and movement rates in multi-state tag-return and capture-recapture models,we develop multi-state fishery tag return models with potential forfisheries that have multiple sites or patches with movement possible between sites. We build on models developed by Brownie et al. (1985), Pollock et al. (1991, 1995), Hoenig et al. (1998 a, b), and Hearn et al. (1998) on twice-a-year tagging for single state models.These methods allow the estimation of patch-specific natural and fishingmortality rates and movement rates between patches.
We then develop multi-state fishery tag-return and capture-recapture models with potential forfisheries that have multiple sites or patches withmovement possible between sites when taggingtakes place twice a year.These methods allow the estimation of patch-specific reporting, natural and fishing mortality rates, and movement rates between patcheswith movement time following a uniform distribution for two special cases: (1) a two-site tag-return fisheries model;(2) a two-site model with capture-recapture catch and releasesampling in a marine reserve closed to regular fishing and the more usual tag-return sampling in the fishery area, since marine reserves which provide a refuge from fishing are gaining in popularity as a tool of fisheries management, but their effectiveness needs to beevaluated. We present small simulation studies andcompare the Relative Bias and Relative Standard Errors (RES) of estimatesas well as the correlations between estimates
Documents on Lao Government and Armed Forces
No full textSeveral reports on the situation in Laos as well as the ongoing conflict between Communists and other groups in Laos and Vietnam, including the decline of the Royal Lao Government.Report 1 is an U.S. Army Attache background on the Lao Army, 1964;Report 2 is a list of the ministers of the Lao government, undated:Report 3 is an article by Stanley Karnow " Free no more: the allies America forgot" in Geo, unable to find exact citation, scan of article;Report 4 is a U.S. Mission to Laos Memo, very faint, 1966, author is Orr, introduces a report (in French);Report 5 is the French report on hydroelectric projects in Laos;Report 6 is an unclassified research memorandum Psychological Characteristics of the Laotian Peoples; A Preliminary Anthropological and Medical Survey, 1966;Report 7 covers a presentation science and education made at the Rehovot Conference on Science and Education in Developing Countries (1969 : Jerusalem and Rehovot, Israel), 1969;Report 8 is the January, February, April, and May 1967 Muong Phieng Cluster Newspaper (translated from Lao
¿Química o color?: comparación entre el uso de fluorescencia de rayos-X portátil y las técnicas visuales de clasificación de obsidiana de Tepeticpac. 50. Arqueología
No full textBibliografía
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• Hammond, Norman
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2010. “La dinámica regional entre el valle de
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Analysis of watersheds and river systems: short course
No full textShort course: Analysis of Watersheds and River Systems, Session I and II, held on May 28-June 1, 1979 and June 4-June 8, 1979 at Colorado State University, Fort Collins, Colorado.Speakers: Dr. E. V. Richardson, Dr. David Duttweiller, Mr. Lee Mulkey, Dr. Stanley A. Schumm, Dr. Daryl B. Simons, Dr. Ross Carder.Includes bibliographical references.This short course is designed for individuals dealing with the analysis of watersheds and rivers. Practical applications concerning physical processes will be emphasized.Chapter 1. General introduction / Daryl B. Simons and Ruh-Ming Li -- Chapter 2. Introduction to watershed and river analysis / Daryl B. Simons and Ruh-Ming Li -- Chapter 3. Physical processes governing response of watersheds and rivers / Daryl B. Simons, Timothy J. Ward and Ruh-Ming Li -- Chapter 4. Sediment transport / H. W. Shen -- Chapter 5. Alluvial bed roughness / H. W. Shen -- Chapter 6. Overview of flood routing methods / Ruh-Ming Li and V. Miguel Ponce -- Chapter 7. Water routing and yield from watersheds, Part I and II / Ruh-Ming Li, Daryl B. Simons, and Kenneth G. Eggert -- Chapter 8. Water routing in rivers / Yung-Hai Chen -- Chapter 9. Stage discharge relations / Robert K. Simons, Ruh-Ming Li, and Daryl B. Simons -- Chapter 10. Watershed sediment yield / Ruh-Ming Li, Daryl B. Simons, and Timothy J. Ward -- Chapter 11. Unsteady sediment routing models in rivers / Yung-Hai Chen and Daryl B. Simons -- Chapter 12. Known discharge sediment routing / Glenn O. Brown and Ruh-Ming Li -- Chapter 13. Landslide potential delineation / Timothy J. Ward, Ruh-Ming Li, and Daryl B. Simons -- Chapter 14. Application of Kalman filtering in watershed and river analysis / Nguyen Duong -- Chapter 15. Handheld calculator programs for analysis / Kenneth G. Eggert, Ruh-Ming Li, and Daryl B. Simons -- Chapter 16. Overview of case studies and data management / Daryl B. Simons, Ruh-Ming Li, and Nguyen Duong -- Chapter 17. Canal and channel design and river response analysis / Daryl B. Simons, Ruh-Ming Li, and Yung-Hai Chen -- Chapter 18. Degradation and aggradation analysis / Ruh-Ming Li and Daryl B. Simons -- Chapter 19. Watershed best management analysis / Ruh-Ming Li, Timothy J. Ward, and Daryl B. Simons -- Chapter 20. Large river basin analysis: Yazoo River Sedimentation Study / Daryl B. Simons and Ruh-Ming Li
Steady convection in stratified fluid
No full textFebruary 1972.Sponsored by the National Science Foundation 01878.Sponsored by the National Oceanic and Atmospheric Administration E-22-55-7(G)
Evaluating carbon offsets from forestry and energy projects
No full textUnder the Kyoto Protocol, industrial countries accept caps on their emissions of greenhouse gases. They are permitted to acquire offsetting emissions reductions from developing countries - which do not have emissions limitations - to assist in complying with these caps. Because these emissions reductions are defined against a hypothetical baseline, practical issues arise in ensuring that the reductions are genuine. Forestry-related emissions reduction projects are often thought to present greater difficulties in measurement and implementation, than energy-related emissions reduction projects. The author discusses how project characteristics affect the process for determining compliance with each of the criteria for qualifying. Those criteria are: 1) Additionality. Would these emissions reductions not have taken place without the project? 2) Baseline and systems boundaries (leakage). What would business-as-usual emissions have been without the project? And in this comparison, how broad should spatial, and temporal system boundaries be? 3) Measurement (or sequestration). How accurately can we measure actual with-project emissions levels? 4) Duration or permanence. Will the project have an enduring mitigating effect? 5) Local impact. Will the project benefit its neighbors? For all the criteria except permanence, it is difficult to find generic distinctions between land use change and forestry and energy projects, since both categories comprise diverse project types. The important distinctions among projects have to do with such things as: a) The level and distribution of the project's direct financial benefits. b) How much the project is integrated with the larger system. c) The project components'internal homogeneity and geographic dispersion. d) The local replicability of project technologies. Permanence is an issue specific to land use and forestry projects. The author describes various approaches to ensure permanence, or adjust credits for duration: the ton-year approach (focusing on the benefits from deferring climatic damage, and rewarding longer deferral); the combination approach (bundling current land use change and forestry emissions reductions with future reductions in the buyer's allowed amount); a technology-acceleration approach; and an insurance approach.Montreal Protocol,Environmental Economics&Policies,Climate Change,Decentralization,Global Environment Facility,Environmental Economics&Policies,Energy and Environment,Carbon Policy and Trading,Montreal Protocol,Climate Change
\u3ci\u3eBirds of the Rocky Mountains\u3c/i\u3e—Color plates 1 - 42
No full textPlate 1. Spruce grouse, displaying male. Photo by author. Plate 2. American white pelicans and Caspian terns, breeding colony on Yellowstone Lake. Photo by author. Plate 3. Double-crested cormorant and California gulls, breeding colony on Yellowstone Lake. Photo by author. Plate 4. Trumpeter swan, adult and cygnets. Photo by author. Plate 5. Harlequin duck, male. Photo by author. Plate 6. Barrow’s goldeneye, female and brood. Photo by author. Plate 7. Common merganser, female and brood. Photo by author. Plate 8. Osprey, adult. Photo by author. Plate 9. Red-tailed hawk, adult. Photo by author. Plate 10. Golden eagle, adult. Photo by author. Plate 11. Prairie falcon, female perched above nest site. Photo by author. Plate 12. Blue grouse, adult male. Photo by author. Plate 13. White-tailed ptarmigan, pair in spring plumage. Photo by author. Plate 14. Ruffed grouse, displaying male. Photo by author. Plate 15. Greater sandhill crane, pair with chick. Photo by author. Plate 16. Great horned owl, adult. Photo by Alan G. Nelson. Plate 17. Spotted sandpiper, adult in spring. Photo by author. Plate 18. Northern saw-whet owl, adult. Photo by author. Plate 19. Great gray owl, adult. Photo by Olaus Murie. Plate 20. Calliope hummingbird, adult male. Photo by Kenneth Fink. Plate 21. Rufous hummingbird, adult male. Photo by Alan G. Nelson. Plate 22. Black-backed woodpecker, adult male. Photo by Alan G. Nelson. Plate 23. Yellow-bellied sapsucker, adult male. Photo by Alan G. Nelson. Plate 24. Steller’s jay, adult. Photo by author. Plate 25. Clark’s nutcracker, adult. Photo by author. Plate 26. Gray jay, adult. Photo by author. Plate 27. Mountain chickadee, adult at nest. Photo by author. Plate 28. Chestnut-backed chickadee. Photo by author. Plate 29. American dipper, juvenile. Photo by author. Plate 30. American robin, adult at nest. Photo by Scott Johnsgard. Plate 31. Mountain bluebird, adult male. Photo by author. Plate 32. Swainson’s thrush, adult at nest. Photo by Alan G. Nelson. Plate 33. Water pipit, adult. Photo by author. Plate 34. Yellow-rumped (Audubon’s) warbler, adult male at nest. Photo by Kenneth Fink. Plate 35. Western tanager, adult male. Photo by author. Plate 36. Lazuli bunting, adult male. Photo by author. Plate 37. Dark-eyed (Oregon) junco, adult. Photo by Kenneth Fink. Plate 38. White-crowned sparrow, adult. Photo by author. Plate 39. Yellow-headed blackbird, adult male. Photo by author. Plate 40. Red crossbill, immature male. Photo by author. Plate 41. Cassin’s finch. adult male. Photo by Alan G. Nelson. Plate 42. Gray-crowned rosy finch, winter male. Photo by Alan G. Nelson
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