Application of ERTS imagery to the study of caribou movements and winter habitat

There are no author-identified significant results in this report

Use of LANDSAT imagery for wildlife habitat mapping in northeast and east central Alaska

There are no author-identified significant results in this report

Ratchet Cellular Automata for Colloids in Dynamic Traps

We numerically investigate the transport of kinks in a ratchet cellular automata geometry for colloids interacting with dynamical traps. We find that thermal effects can enhance the transport efficiency in agreement with recent experiments. At high temperatures we observe the creation and annihilation of thermally induced kinks that degrade the signal transmission. We consider both the deterministic and stochastic cases and show how the trap geometry can be adjusted to switch between these two cases. The operation of the dynamical trap geometry can be achieved with the adjustment of fewer parameters than ratchet cellular automata constructed using static traps.Comment: 7 pages, 5 postscript figure

Assessment of institutional barriers to the use of natural gas fuel in automotive vehicle fleets

Institutional barriers to the use of natural gas as a fuel for motor vehicle fleets were identified. Recommendations for barrier removal were developed. Eight types of institutional barriers were assessed: (1) lack of a national standard for the safe design and certification of natural gas vehicles and refueling stations; (2) excessively conservative or misapplied state and local regulations, including bridge and tunnel restrictions, restrictions on types of vehicles that may be fueled by natural gas, zoning regulations that prohibit operation of refueling stations, parking restrictions, application of LPG standards to LNG vehicles, and unintentionally unsafe vehicle or refueling station requirements; (3) need for clarification of EPA's tampering enforcement policy; (4) the U.S. hydrocarbon standard; (5) uncertainty concerning state utility commission jurisdiction; (6) sale for resale prohibitions imposed by natural gas utility companies or state utility commissions; (7) uncertainty of the effects of conversions to natural gas on vehicle manufactures warranties; and (8) need for a natural gas to gasoline equivalent units conversion factor for use in calculation of state road use taxes

The feasibility of identifying wildland resources through the analysis of digitally recorded remote sensing data Annual progress report

Identification of forestry and wildland resources by analysis of remote sensor dat

Caribou Feeding Sites in Relation to Snow Characteristics in Northeastern Alaska

Caribou select areas of relatively shallow snow for winter feeding, and do so on at least two levels: broad area and microsite. They do not normally select sites with snow-packs having mean integrated Ram hardness values in excess at 85. However, in areas of relatively shallow hard-packed snow, which is easily fractured into slab-like pieces, they can obtain access to vegetation with less expenditure of energy than Ram hardness values alone would suggest. Alpine feeding areas in the Porcupine Lake basin of northeastern Alaska had this type of snow-pack in the winter of 1972-73. In typical taiga winter range, caribou use areas where the snow depth is less than 50 centimetres

Lagere ammoniakemissie bij stalen roosters

Door de roosterbalk smaller te maken is een grotere mestdoorlaat mogelijk. Dit is alleen mogelijk met andere materialen zoals staal

A test of the concept and practical application of multiband reconnaissance Final report

Advantages, limitations, and optimization of multiband reconnaissance techniques for earth resource inventorie

Klauwgezondheid op stalen roosters ook goed

Bij de standaard uitvoering blijft er veel mest aan de roosterbalken hangen waardoor de emissie hoog is. Door de roosterbalk smaller te maken wordt de mestdoorlaat vergroot en zou de ammoniakemissie lager kunnen zijn