When precipitation falls on frozen soil, serious soil loss can
occur. In order to assign realistic probabilities to the occurrence of
this condition for use in predicting erosion rates over long time
periods, a technique for combining characteristics of precipitation and
air temperature records is applied to hourly wet season...
This paper describes the design and implementation of
"A multiprocessor node for communication and control"
(MPCC). MPCC is a high speed, high performance local area
network capable of performing real time control tasks. This
is achieved by the concurrent operation of two 8051
microcontrollers, a dual port RAM and the...
The effects of different fallow moisture levels and tillage
systems on the amount of nitrate-nitrogen accumulation in the 0-30 cm
soil profile were studied.
Fallow moisture treatments simulating typical dry, normal and
wet precipitation cycles were established on trial plots.
Data were obtained for nitrate-nitrogen, soil moisture and
nitrogen mineralization...
An automated multielement flame atomic fluorescence (AF) spectrometer based on microcomputer control was constructed to determine four elements simultaneously. The instrument employs a multiple exit slit monochromator where the light from various exit slits is directed to a single detector with a mirrored funnel. Each element is excited to fluoresce...
This thesis is concerned with the development and use of routine
analysis techniques based on chemiluminescence (CL) detection for: 1)
ethanol in gin down to the 0.3% (v/v) level; 2) the antioxidants propyl
gallate and BHA in lard to levels as low as 0.3 and 0.2 mg/L, respectively; 3) pyrogallol...
Wecoma cruise W8807A was conducted in late July and early August 1988 as part of the Coastal Transition Zone project. CTD observations were made over a standard grid in the coastal transition zone off northern California between 37°N and 39.5°N that was occupied repeatedly during June, July and August; this...
Observations of temperature and pressure between 10 and 70 m depth
were taken with a towed thermistor chain during late August and early September, 1978, about 400 km northwest of Scotland as a part of the JASIN Experiment. The chain was usually towed at a speed of 3 mis around...
This case study of the Spokane Valley-Rathdrum Prairie aquifer, deals with the evolution of water quality protection. A number of institutional efforts on multijurisdictional levels
have established a piecemeal approach for this aquifer's protection. Federal legislation includes designation as a 'Sole Source' aquifer under sec. 1424(e) of SDWA, and 1...
The purposes of this study were to develop a valid and
reliable attitudes toward science instrument in the Thai
language and determine the differences in attitudes toward
science and achievement in physical and biological science
of Thai boys and girls in lower secondary education.
The population consisted of 709 students,...