Book Description
This digital document is a journal article from Forest Ecology and Management, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
We estimated the total aboveground tree biomass (TAGB) in an old-growth primary forest and in a regenerating forest that had been selectively logged in 1958, both within the tropical rainforest of the Pasoh Forest Reserve in Peninsular Malaysia. This was achieved by comparing aerial photographs with data obtained previously from destructive sampling in the same area. Aerial photographs were taken above the primary and logged forest plots in 1997. The heights of the canopy-forming trees were estimated in both plots by means of aerial triangulation and were regressed against the diameter at breast height (DBH) of the corresponding trees measured during ground surveys. The resulting allometric relationship between tree height and DBH let us estimate TAGB: in the primary forest, TAGB was 310Mgha^-^1, which was ca. 10-12% smaller than the value estimated by means of destructive sampling conducted in the 1970s. The estimated TAGB of the logged forest was 274Mgha^-^1, which was significantly smaller than that of the primary forest (P < 0.05). We also measured canopy surface height in a 2.5m grid system. We found that the mean canopy surface height (MCH) in every 20m x 20m subplot (0.04ha) was significantly (P < 0.0001) correlated with TAGB for that subplot. This suggests that the spatial variation of TAGB can be estimated using MCH values obtained from such a grid system, and that biomass levels can potentially be estimated by means of satellite remote sensing on larger scales, even for very dense tropical forests. We also found that digital reflectance values from Landsat Thematic Mapper (TM) images differed significantly between the logged and primary forests, and hypothesize that these differences relate to structural differences in the canopy surface. However, TAGB in both plots was poorly correlated with the Landsat reflectance values, suggesting the necessity of using an active remote-sensing sensor or a laser profiling system that can quantify changes in the forest's vertical structure or volume to estimate biomass and its variation in dense evergreen forests. ... Read more

Customer Reviews (2)

Aging and highly technical treatise on 3-D sound
This publication deals with the human factors and signal processing aspects of audio in 3-D systems. It is divided into six chapters:
1. Virtual Auditory Space: Context, Acoustics, and Psychoacoustics
2. Overview of Spatial Hearing Part 1: Azimuth and Elevation Perception
3. Overview of Spatial Hearing Part 2: Sound Source Distance and Environmental Context
4. Implementing 3-D Sound Systems, Sources, and Signal Processing
5. Virtual Acoustic Applications
6. Resources
Chapters one through four are the most useful as they present details of psychoacoustics, physical acoustics, and signal processing with plenty of instructive diagrams and equations when necessary. Chapters 5 and 6 on applications and resources are the least useful since they focus on these subjects from the perspective of 1994, which might as well be a century ago given the progress made in computing platforms. This publication is still useful since most texts in print on audio today focus on Windows-centric plug-in solutions for games where there are little technical details about the physics of the situation because the targeted reader is a high school or college student writing game programs in their basements. If you think this rather academic tome is for you, it is now available free on the web. Since Amazon tends to throw out reviews with web addresses in them, suffice it to say if you type in "3-D sound for virtual reality and multimedia" in quotations as I show it here into Google, the first web address you see should be the on-line version of this book.
The reader should already be familiar with digital signal processing in order to get the most out of this publication. If you are planning on doing the "big picture" design of a 3-D audio application, this old publication is essential reading.

This is definitely the best book available on 3D audio
I'm pretty sure that it is also the only book presently available.It IS fairly well written, and if you are writing a sound engine for a game, or a similar application, I would strongly recommend this book.On the otherhand, parts of it are extremely technical, so if you do not know if you canfollow it, you may wish to keep looking. ... Read more

Book Description
In the 1950`s San Francisco photographer Denny Denfield recordedthousands of handsome and muscular young men with his Stereo Realist Camera. Stereophotography -- pictures that can be seen in three dimensions and take on an amazinglifelike reality -- have been around for a long time, but these are definitely not yourgrandmother's stereo-views! Denfield took nude stereo photos of friends, professionalphysique models and others. Peer through the enclosed viewer into a secret world ofnaked, masculine beauty and highly charged eroticism. These nude stereos are a uniquedocument of a time, a place and an all-but-forgotten photographic technique. ... Read more

Book Description
The word photography means "drawing with light." Kids can discover how lighting, angles and composition can bring the world into focus. With fun photography projects, related craft ideas and a glossary, this book lets everyone get in the picture! ... Read more

Customer Reviews (2)

Fun Kid's Photography
I bought this for my grandson but wanted to keep it for myself when I reviewed it!

Basic intro for kids
If your looking for a very basic introduction to photography for kids, this might be for you.It doesn't cover anything in depth, there's not nearly enough space in forty pages for that.On the other hand, if your "small one" is looking for a handful of ideas without the burden of techno speak it's worth checking out.Technically I'd say it's a CRAFT book the USES photography rather than a photography book that offers some crafts as most of the crafts could be done with or without the benifit of a camera.All in all not a bad book but not in the same league as say "The Kids Guide to Digital Photography" by Jenni Bidner. ... Read more