Digital Commons Network^™

Beef Performance Testing: Questions And Answers, L. A. Nelson, K. G. Macdonald

Historical Documents of the Purdue Cooperative Extension Service

No abstract provided.

Federal Gift And Estate Tax Changes: Explanation, Comments, And Planning For The 80s, Gerald A. Harrison

Historical Documents of the Purdue Cooperative Extension Service Archive

No abstract provided.

Interactive Clustering On A High-Speed Image Display System, P. H. Swain, S. M. Davis, R. J. Clouthier

LARS Technical Reports

An interactive implementation of cluster analysis for remote sensing image processing is described. The implementation utilizes the capabilities of a modern image display system, thereby facilitating analyst control of the processing and evaluation of the results.

A Crops And Soils Data Base For Scene Radiation Research, L. L. Biehl, M. E. Bauer, B. F. Robinson, C. S. T. Daughtry, L. F. Silva, D. E. Pitts

LARS Technical Reports

Development of a crops and soils field research data base was initiated in 1972 at Purdue University's Laboratory for Applications of Remote Sensing and expanded in the fall of 1974 by the NASA Johnson Space Center as part of the Large Area Crop Inventory Experiment. The primary purpose for the data base is to provide fully annotated and calibrated multispectral sets of spectral, agronomic, and meteorological data for agricultural remote sensing research.

The data base presently includes over 200,000 truck-mounted and helicopter-borne spectroradiometer and multiband radiometer observations and 400 flight lines of aircraft scanner data. These data are supplemented by …

Corn And Soybean Landsat Mss Classification Performance As A Function Of Scene Characteristics, G. T. Batista, M. M. Hixson, M. E. Bauer

LARS Technical Reports

In order to fully utilize remote sensing to inventory crop production, it is important to identify the factors that affect the accuracy of Landsat classifications. The objective of this study was to investigate the effect of scene characteristics involving crop, soil, and weather variables on the accuracy of Landsat classifications of corn and soybeans. Segments sampling the U.S. Corn Belt were classified using a Gaussian maximum likelihood classifier on multitemporally registered data from two key acquisition periods. Field size had a strong effect on classification accuracy with small fields tending to have low accuracies even when the effect of mixed …

Assessing Crop Condition At The Field Level Using Landsat Spectral Data, S. E. Hollinger, M. M. Hixson, M. E. Bauer

LARS Technical Reports

A vegetation index (Kauth-Thomas greenness) was used to estimate a stress-no stress condition on corn and soybean fields in AgRISTARS segments. The procedure is an adaptation of the method developed by Thompson and Wehmanen to determine stress levels on the entire segments using Landsat spectral data. The predictions were compared to the Palmer Crop Moisture Index (CMI) and an area was assumed to be stressed when the CMI was less than -1.0. Although additional tests need to be run using years when more severe stress occurs to check the validity of the procedure, in 1978 the procedure predicted 90 and …

Equipment For Local Hyperthermia Therapy Of Cancer, Charles F. Babbs, James R. Oleson, John A. Pearce

Weldon School of Biomedical Engineering Faculty Publications

Rapid improvements in hyperthermia apparatus are being achieved by industrial and university-based research groups that have already led to the marketing of a variety of commercial systems for heat therapy of malignancy. These tissue heating systems employ microwaves, capacitively or inductively coupled radiofrequency current, or high intensity ultrasound to produce controlled local heating of tumor tissues. No single system is superior to others in all applications; each has its limitations.

Design Of Refrigerant Compressor With Hydraulically Coupled,Hermetically Sealed Linear Drive, J. English, J. Corey

International Compressor Engineering Conference

No abstract provided.

Probabilistic Relaxation On Multitype Data, H. M. Kalayeh, D. A. Landgrebe

LARS Technical Reports

Classification of multispectral image data based on spectral information has been a common practice in the analysis of remote sensing data. However, the results produced by current classification algorithms necessarily contain residual inaccuracies and class ambiguity. By the use of other available sources of information, such as spatial, temporal and ancillary information, it is possible to reduce this class ambiguity and in the process improve the accuracy.

In this paper, the probabilistic and supervised relaxation techniques are adapted to the problem. The common probabilistic relaxation labeling algorithm (PRL), which in remote sensing pixel labeling usually converges toward accuracy deterioration, is …

The Influence Of Computers On Compressor Technology., John F. T. Maclaren

International Compressor Engineering Conference

No abstract provided.

Analysis Of Bending Stresses In Cantilever Type Suction Valve Reeds, R.J. L. Mclaren, S. Papastergiou, J. Brown, J. F. T. Maclaren

International Compressor Engineering Conference

No abstract provided.

Computer Aided Manufacture Of Original Equipment Manufacturer Screw Compressor Rotors, R. Mould, G. Richmond, D. Thrall

International Compressor Engineering Conference

No abstract provided.

Motion Analysis Of Rolling Piston In Rotary Compressor, T. Yanagisawa, T. Shimizu, I. Chu, K. Ishijima

International Compressor Engineering Conference

No abstract provided.

Influence Of Surface Finishing On Fatigue Properties Of Valve Steel, G. Persson

International Compressor Engineering Conference

No abstract provided.

Simulation For Thermodynamic Aspects Of Reciprocating Refrigerant Compressors Using Real Gas Properties, J. P. Singhal, R. Prakash, H. K. Varma

International Compressor Engineering Conference

No abstract provided.

Characterization Of The Oscillometric Method For Measuring Indirect Blood Pressure, L A. Geddes, M Voelz, C Combs, D Reiner, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

In this study, human subjects and dogs were used to determine the ability of the oscillometric method to indicate systolic and diastolic pressure. In the human studies, the auscultatory method was used as the reference. In the animal studies, directly recorded blood pressure was used as the reference. The ability of the sudden increase in cuff pressure oscillations during cuff deflation to indicate systolic pressure was examined and found to overestimate systolic pressure slightly in man, but more in animals. Systolic pressure was encountered when the cuff pressure oscillations were about one half of their maximum amplitude. However, in both …

Biology Of Local Heat Therapy For Cancer, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

Successful cancer therapy must selectively destroy tumor tissue while sparing the host's normal tissues. Local heat treatment can have such a selective effect because abnormalities in tumor blood vessels supply less oxygen to heat-stressed tumor cells and are less efficient in cooling tumor tissue by blood perfusion.

Hydralazine-Enhanced Selective Heating Of Transmissible Venereal Tumor Implants In Dogs, William D. Voorhees Iii, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

This study was designed to test the hypothesis that vasodilator drugs can enhance selective heating of solid tumors by producing a favorable redistribution of blood flow between tumor and normal tissues. Subcutaneous transmissible venereal tumor implants were heated by inductive diathermy using Helmholtz coils in 8 dogs. The temperature rise in tumor and adjacent muscle was measured before and after giving hydralazine (0.5 mg/kg i.v.). Blood flow to the tumors and underlying muscle was measured with radioactive tracer microspheres. Before hydralazine treatment mean muscle blood flow was about one-third tumor blood flow (0.11  0.02 vs. 0.28  0.09 ml/min/g), …

Theoretical Feasibility Of Vasodilator-Enhanced Local Tumor Heating, Charles F. Babbs, David P. Dewitt, William D. Voorhees, Janet S. Mccaw, Rosanna C. Chan

Weldon School of Biomedical Engineering Faculty Publications

Normal arterioles, in contrast to the abnormal microvasculature of many solid tumors, provide a target for selective drug action that can enhance local heat treatment of the tumors. Measurements of tissue blood flow with radioactive microspheres and estimates of changes in blood flow with thermal clearance methods revealed that vasodilator drugs either decreased or did not alter blood flow in hamster melanoma, rat hepatoma, and canine transmissible venereal tumor, while increasing perfusion in adjacent normal tissues 2 to 4-fold. Solutions of the bio-heat transfer equation, which take into account such selective effects of vasodilators on blood flow in normal tissues, …

Cardiopulmonary Resuscitation With Interposed Abdominal Compression In Dogs, Sandra H. Ralston, Charles F. Babbs, Mark J. Niebauer

Weldon School of Biomedical Engineering Faculty Publications

This study was conducted to evaluate the hemodynamic effectiveness of a new modification of cardiopulmonary resuscitation (CPR), termed interposed abdominal compression- CPR (IAC-CPR). IAC-CPR utilizes all the steps of standard CPR with the addition of abdominal compressions interposed during the release phase of chest compression. Ventricular fibrillation was induced electrically in 10 anesthetized dogs, and either IAC-CPR or standard CPR was initiated while arterial and venous blood pressures and cardiac output were monitored. The two CPR methods were alternated every three minutes over a period of thirty minutes. The addition of interposed abdominal compressions to standard CPR improved arterial pressures …

An Experimental Study Of Frequency-Controlled Compressors, T. Itami K. Okoma, K. Misawa

International Compressor Engineering Conference

No abstract provided.

Analytical Modeling Of Helical Screw Machine For Analysis And Performance Prediction, B. Sangfors

International Compressor Engineering Conference

No abstract provided.

Determination Of The Thermodynamic Properties Of Refrigerant-Oil Mixtures, D. W. Hughes, J. T. Mcmullan, R. Morgan

International Compressor Engineering Conference

No abstract provided.

The Calculating Of Optimal Pressure Ratios And Cylinder Bore Ratios Of Multistage Compressors , X. Qian

International Compressor Engineering Conference

No abstract provided.

Analysis Of Compressor Bolt Fasteners Subjected To Dynamic Loading, D. G. Symer

International Compressor Engineering Conference

No abstract provided.

An Experimental Investigation Of The Aerodynamics Of A Disc Valve, J. S. Fleming, J. Brown

International Compressor Engineering Conference

No abstract provided.

A Simple But Efficient Equipment For Experimental Determination Of Valve Loss Coefficients Under Compressible And Steady Flow Conditions, H. H. Weiss, L. Boswirth

International Compressor Engineering Conference

No abstract provided.

On The Classification Of Compressor,Pump Or Engine Designs Using Generalized Linkages, J. E. Beard, A. S. Hall, W. Soedel

International Compressor Engineering Conference

No abstract provided.

Optimization Of A Special Shaped Rotary Vane Compressor - Comparison Of Theoretical And Experimental Results, H. Lindemann, H. Kaiser, M. Kuever, H. Kruse

International Compressor Engineering Conference

No abstract provided.

Estimating Valve Losses When Dynamic Effects Are Important, D. Woollatt

International Compressor Engineering Conference

No abstract provided.