منابع مشابه
Using the global positioning system to map disturbance patterns of forest harvesting machinery
A method was presented to transform sampled machine positional data obtained from a global positioning system (GPS) receiver into a two-dimensional raster map of number of passes as a function of location. The effect of three sources of error in the transformation process were investigated: path sampling rate (receiver sampling frequency); output raster resolution; and GPS receiver errors. Tota...
متن کاملThe Performance of Machinery for Mechanical Harvesting and Loading of Sugarcane
The results of these studies showed that mechanical loader and combine harvester performance varied considerably depending on the type of machine, cane yield, and crop and field conditions. Instantaneous loading rates and mechanical harvesting pour rates varied between 60 and 100 tons per hour. Infield cane losses were significantly lower where the cane was manually cut and mechanically loaded ...
متن کاملVibration Energy Harvesting: Machinery Vibration, Human Movement and Flow Induced Vibration
With the development of low power electronics and energy harvesting technology, selfpowered systems have become a research hotspot over the last decade. The main advantage of self-powered systems is that they require minimum maintenance which makes them to be deployed in large scale or previously inaccessible locations. Therefore, the target of energy harvesting is to power autonomous ‘fit and ...
متن کاملNarrative text analysis of accident reports with tractors, self-propelled harvesting machinery and materials handling machinery in Austrian agriculture from 2008 to 2010 - a comparison.
The aim of this study was the identification of accident scenarios and causes by analysing existing accident reports of recognized agricultural occupational accidents with tractors, self-propelled harvesting machinery and materials handling machinery from 2008 to 2010. As a result of a literature-based evaluation of past accident analyses, the narrative text analysis was chosen as an appropriat...
متن کاملCalifornia Seeing Dramatic Increase in Cost of Timber Harvesting, According to Study by Cal Poly Institute
SAN LUIS OBISPO-The cost of preparing state-mandated plans to harvest trees in California has increased more than 1,200 percent over the last 30 years, making it difficult to manage forests and increasing the likelihood that forest land will be converted for other uses, according to a study released today by Cal Poly's Institute for the Study of Specialty Crops. The study found the typical harv...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1898
ISSN: 0036-8733
DOI: 10.1038/scientificamerican10081898-235