Digital Commons Network^™

Chemical Aspects Of Refrigerant Systems, K. S. Sanvordenker

International Compressor Engineering Conference

No abstract provided.

Computer Simulation Of A One-Cylinder Reciprocating Compressor Using A Hybrid Computer, H. J. Blankespoor, S. Touber

International Compressor Engineering Conference

No abstract provided.

Performance Improvement And Dimensional Commonization With A Compressor Simulation, D. A. Coates

International Compressor Engineering Conference

No abstract provided.

1971 Corn Blight Watch Experiment Data Processing, Analysis, And Interpretation, Terry L. Phillips

LARS Technical Reports

The nature of the Corn Blight Watch Experiment and available resources to conduct the experiment dictated that there be several centers of activity supporting the overall objectives. Mr. Robert MacDonald described in an attached paper the experiment overview and participants. Dr. Marvin Bauer described the corn blight problem. In other attached papers Mr. Richard Allen discussed the sampling model and ground data measurements program while Mr. Ronald Blilie presented the aircraft data acquisition for the experiment. In this paper the Corn Blight Watch Experiment will be described from the point of view of data processing, analysis, and interpretation procedures. Data …

Minimum Distance Classification In Remote Sensing, A. G. Wacker, D. A. Landgrebe

LARS Technical Reports

The utilization of minimum distance classification methods in remote sensing problems, such as crop species identification, is considered. Minimum distance classifiers belong to a family of classifiers referred to as sample classifiers. In such classifiers the items that are classified are groups of measurement vectors (e.g. all measurement vectors from an agricultural field), rather than individual vectors as in more conventional vector classifiers.

Specifically in minimum distance classification a sample (i.e. group of vectors) is classified into the class whose known or estimated distribution most closely resembles the estimated distribution of the sample to be classified. The measure of resemblance …

Results Of The 1971 Corn Blight Watch Experiment, Robert B. Macdonald, Marvin E. Bauer, Richard D. Allen, Joseph W. Clifton, Jon D. Erickson, David A. Landgrebe

LARS Technical Reports

A serious and unexpected epiphytotic of southern corn leaf blight reduced the nation's corn crop by 15 percent as a new race of this previously minor disease swept through the Southern and Corn Belt states during July and August, 1970. The disease appeared so suddenly and moved with such speed that accurate information on its extent and severity was not compiled until well after the end of the growing season.

Research by the Laboratory for Applications of Remote Sensing (LARS) in 1970 had shown that three stages of blight infection could be accurately classified from small scale color infrared photography …

A Cluster-Oriented Analysis Of Multispectral Scanner Data, Paul E. Anuta

LARS Technical Reports

The standard procedure at LARS for classification analysis of aircraft scanner data has been to training samples (fields) based on the ground truth data and to use these directly or in a form subdivided via clustering as training for the computer. In this process the major emphasis is on defining class statistics which describe actual materials of interest as designated by the user. The approach assumes these materials are spectrally separable and classification is performed to test if this is true. In the approach described here the multispectral data is first clustered to determine what spectrally separable groups exist in …

A Three-Stage Sample Model For Remote Sensing Applications, Ludwig M. Eisgruber

LARS Technical Reports

Large-scale applications of remote sensing for the purpose of preparing crop estimates, natural resource inventories, disaster assessments, etc. for a given geographic region will, in general, involve questions of sampling, since complete coverage of the total geographic region and subsequent analysis of data collected with complete coverage appear technically and economically infeasible. This is true regardless of whether an aircraft, or a satellite is involved, and It applies equally to photography, multispectral measurements, radar, etc. Thus, even if remote sensing provided completely accurate data, estimates (of crop acreage, natural resources, extent of disaster, etc.) for the total region under study …

Engineering Soils Mapping From Multispectral Imagery Using Automatic Classification Techniques, Terry R. West

LARS Technical Reports

Multispectral imagery collected over southeastern Pennsylvania by Willow Run Laboratories, University of Michigan, was analyzed at the Laboratory for Applications of Remote Sensing (LARS) using its current capabilities for automatic classification. The project involved the evaluation of imagery in thirteen discrete bands of the spectrum as a source of data on engineering soils. Detailed computer classifications of two 4-mile segments of the Pennsylvania flightline, each containing predominantly one parent soil material, were obtained. Classification accuracy as measured by training field and test field performance was in excess of 90%. Using these two segments as a basis, a computer-implemented map was …

Definition Of Spectrally Separable Classes For Soil Survey Research, J. E. Cipra, P. H. Swain, J. H. Gill, M. F. Baumgardner, S. J. Kristof

LARS Technical Reports

Spectral classes defined by a Euclidean distance criterion have shown similarity to soil classes as mapped by the National Cooperative Soil Survey (local, state, and federal governments cooperating). However, two problems have occurred in past studies: 1) The number of spectral classes defined by the researcher is arbitrary. 2) Spectral properties of nonvegetated soils are modified by rainfall, cultivation, and other factors not directly related to the classes of interest for soil survey purposes.

This research outlines a procedure for defining spectral classes such that the differences between classes can be quantified. It also facilitates determination of a number of …

Measurement Of Available Soil Moisture, F. V. Schultz

LARS Technical Reports

The following pages are the author's notes taken during 1969 and are devoted, in the main, to a discussion of methods for measuring the resistivity of soil. While this is not a satisfactory method for measuring soil moisture, the material was assembled before its shortcomings were appreciated and is documented here as a background to the study of soil moisture measurement as a function of depth. This material is derived from source material and has been printed to have this information available. It does not reflect the research and literature since that time, nor the present thinking of the author.

Moire Patterns And Two-Dimensional Aliasing In Line Scanner Data Acquisition Systems, C. D. Mcgillem, T. E. Riemer

LARS Technical Reports

The basic mechanism underlying the generation of Moire patterns in line scanner data acquisition systems is examined. A general expression is developed in tern of typical system parameters for the reproduced image of such systems and the interaction of the image spectrum; the raster frequency and digital sampling frequency of the A/D conversion process are discussed and examples given. System design requirements for avoiding Moire pattern generation and two-dimensional aliasing are discussed.

Differentiating Elements Of The Soil-Vegetation Complex, M. F. Baumgardner

LARS Technical Reports

One of the most exciting prospects in the application of remote sensing technology is that of identifying, characterizing, measuring, and mapping different elements of the soil-vegetation complex. Important elements in this complex include soil properties, plant species, and the conditions of both soils and plants.

Conjugate Point Determination In Multitemporal Data Overlay, Richard A. Emmert, Claire D. Mcgillem

LARS Technical Reports

The machine processing of spatially variant multitemporal data such as imagery obtained at different times requires that these data be in geometrical registration such that the analysis processor may obtain the datum for a specified ground resolution element in each of the sets of imagery being utilized for analysis.

Misregistration between corresponding subsets of imagery contains both a displacement and a geometrical distortion component, and the affine transformation is postulated to characterize this misregistration between data subsets. Search techniques utilizing the moduli of the Fourier Transforms of these data are developed for estimating the coefficients of geometrical distortion components of …

Determining Density Of Maize Canopy: Iii. Temporal Considerations, E. R. Stoner, M. F. Baumgardner, P. E. Anuta, J. E. Cipra

LARS Technical Reports

Multispectral scanner data were collected In two flights over ground cover plots near the Purdue University Agronomy Farm's Weather Station at an altitude of 305 m. Energy in eleven reflective wavelength bands from 0.46 to 2.6 µm was recorded by the scanner. A set of eight ground reflectance panels was in close proximity to the ground cover plots and was used to normalize the scanner data obtained on different dates. The ground reflectance panels were used to relate laboratory reflectance measurements to scanner response. Separate prediction equations were obtained for both flight dates for all eleven reflective wavelength bands of …

Spectra Of Normal And Nutrient-Deficient Maize Leaves, A. H. Al-Abbas, R. Barr, J. D. Hall, F. L. Crane, M. F. Baumgardner

LARS Technical Reports

Reflectance, transmittance and absorptance spectral of "normal" and six types of nutrient-deficient (N, P, K, S, Mg, and Ca) maize (Zea mays L.) leaves were analyzed at 30 selected wavelengths from 500-2600 nm. The analysis of variance showed significant differences in reflectance, transmittance and absorptance in the visible wavelengths among leaf numbers 3, 4, and 5, among the seven treatments, and among the interactions of leaf number and treatments. In the infrared wavelengths only treatments produced significant differences.

The chlorophyll content of leaves was reduced in all nutrient deficient treatments. Percent moisture was increased in S-, Mg-, and N-deficiencies. Positive …

The Temporal Stability Of Trip Generation Relationships : Technical Paper, Edward J. Kannel, Kenneth W. Heathington

JTRP Technical Reports

No abstract provided.

Retarders For Concrete And Their Effects On Setting Time And Shrinkage : Interim Report, Yasuhiko Yamamoto

JTRP Technical Reports

No abstract provided.

A Simplified Procedure For Major Thoroughfare Planning In Small Urban Areas, Andrew Delaney Jones, William Louise Grecco

JTRP Technical Reports

No abstract provided.

Herbicide Studies In Landscape Plantings : Interim Report, Philip L. Carpenter

JTRP Technical Reports

No abstract provided.

Factors Influencing Dehardening And Rehardening Of Forsythia X Intermedia Stems : Progress Report No. 4, David Foster Hamilton

JTRP Technical Reports

No abstract provided.

An Investigation Into The Gradation Variability Of Aggregates Used In Bases, James T. Parson

JTRP Technical Reports

No abstract provided.

Fundamental Studies Of Portland Cement Concrete, Phase 2 : Interim Report, Sidney Diamond, David Watson Hadley, William Lee Dolch

JTRP Technical Reports

No abstract provided.

Evaluation Of A Mailed Planning Survey, Eugene William Waltz

JTRP Technical Reports

No abstract provided.

Procedure Manual For Determining Traffic Patterns For A Simplified Planning Procedure For Major Thoroughfare Planning In Small Urban Areas : Interim Report, Andrew Delaney Jones, William Louise Grecco

JTRP Technical Reports

No abstract provided.

The Effect Of Plasticity And Quantity Of Fines On Stability Of Soil-Gravel Mixtures, Faiz Makdisi-Ilyas

JTRP Technical Reports

No abstract provided.

The Nature Of The Past-Aggregate Interface : Interim Report, David Watson Hadley

JTRP Technical Reports

No abstract provided.

Toward Accident Reduction Innovations In Driver Education, Michelle Shapiro

JTRP Technical Reports

No abstract provided.

Computerized Slope Stability Analysis: The Sliding Block : Technical Paper, Aditya Mohan, Carlos Mendez, C. W. Lovell

JTRP Technical Reports

No abstract provided.

Computerized Slope Stability: A Sliding Block Model, Aditya Mohan

JTRP Technical Reports

No abstract provided.