CONSUMER POTATO DEMAND

Changes in consumer demographics, socioeconomic conditions, lifestyles, food tastes, and health and nutrition concerns have been associated with shifting food purchase patterns. This article focuses on potato purchase decisions and consumption, using a sample of Washington households. The results suggest that potato purchases are affected by factors such as product quality and price but not availability of point-of-purchase information. Reported changes in fresh and processed potato consumption appeared to be related to concerns with health and nutrition and demand for convenience. These findings have implications for the potato industry in developing new products and marketing strategies.Demand and Price Analysis,

An atlas of emission line fluxes of planetary nebulae in the 1150-3200 A region

Emission line fluxes for 28 planetary nebulae are presented. The nebulae were chosen to cover a wide range of excitation classes, apparent diameters, location in the sky, and types of central stars. All objects were observed in the low dispersion mode of the IUE spectrographs, using the large entrance aperture

A Physical Apparatus for the Determination of the Circulation Time of the Blood in Dogs

A radical departure from previous apparatus for the determination of blood circulation time is described in detail. The ensemble consists of an ionization chamber (Geiger Counter), a high-voltage (to 2500 volts) power supply, a three-stage amplifying system, and an output circuit for recording the discharges which occur when radiations enter the chamber. A separate electrical circuit is utilized to measure the time interval between the injection of the radioactive material (radium C) in the jugular vein of the dog and its arrival in that part of the femoral artery lying in the adductor canal. The technique of separating radium C from radium emanation is described as is also that of shielding the ionization chamber from extraneous radiations. The record obtained during an experimental test is interpreted as to accuracy and physiological significance and the advantages and disadvantages of the method are outlined

The Circulation Time of the Blood in Dogs before and during the Digestion of Food

The circulation time of the blood in dogs was investigated by an ensemble of physical apparatus consisting of an ionization chamber, a high-voltage power supply, a three-stage amplifying system, and an output circuit for recording and timing discharges which occur in the ionization chamber when radiations such as gamma and beta rays enter

The Disruption of Potentials within a Raw Potato under Constant Applied Voltage

Uniformly shaped sections of raw potatoes were placed between parallel plane electrodes and subjected to a constant potential. The potential drops existing between one electrode and various points in the potatoes were measured. The equi-potential surfaces were found to be planes parallel to the surface of the terminal electrodes. The potentials of these planes were found to vary with time and previous passage of current. The relative size of the probing electrodes used influenced the shape of the potential distribution curves

Effect of Previous Training on Grades in Elementary Physics

A study has been made of the relationship between the grades received by students in an elementary course in Physics taken by Home Economics students at Iowa State College and the general high school average of the students. If the college course is taken during the student\u27s first quarter in college a comparison of the curves expressing this relationship for pupils who have had a high school physics course and for pupils who have had no previous physics course shows that there is a particular high school general average below which there is no advantage in having had a previous physics course. On the other hand, for those students whose high school general averages are above this particular average the curves indicate that the advantage of having had a high school course is more pronounced in proportion to the general ability of the student as shown by his general average grade in high school. If the college course in Physics is not taken until two quarters of other college work have been taken (generally including two quarters of chemistry) a comparison shows the same type of curves as for the group having had the college course in their first college quarter but the general high school average, below which no advantage of a previous course is evident, is considerably higher. The data also show no such differentiation in the curves expressing the relationship between the general college average for the previous two quarters and the physics grade in the subsequent quarter for the two groups of students; that is, those having had physics in high school and those not having had a previous course in physics

A New Electrical Method of Determining Specific Heats

89. A new electrical method In this report is described a method of procuring the specific heats of materials by comparing the rate of heating of water by direct passage of current through it to the rate of heating when the water contains small particles of the material. By this method one may determine accurately the specific heat of a substance over various temperature ranges and while the temperature is rising. It is also especially applicable where the specific heat cannot be obtained accurately by the method of mixtures because of the nature of the material

Development of a Physical Shoulder Simulator for the Training of Basic Arthroscopic Skills

Increasingly, shoulder surgeries are performed using arthroscopic techniques, leading to reduced tissue damage and shorter patient recovery times. Orthopaedic training programs are responding to the increased demand for arthroscopic surgeries by incorporating arthroscopic skills into their residency curriculums. A need for accessible and effective training tools exists. This thesis describes the design and development of a physical shoulder simulator for training basic arthroscopy skills such as triangulation, orientation, and navigation of the anatomy. The simulator can be used in either the lateral decubitus or beach chair orientation and accommodates wet or dry practice. Sensors embedded in the simulator provide a means to assess performance. A study was conducted to determine the effectiveness of the simulator. Novice subjects improved their performance after practicing with the simulator. A survey completed by experts, recognized the simulator as a valuable tool for training novice surgeons in basic arthroscopic skills

The design and testing of a centrifugal controlled variable camshaft phasing device for small-block Chevrolet engines

One method of improving performance and efficiency of internal combustion engines is to vary the timing of the valve opening and closure while leaving the lift and duration constant. This is called variable camshaft phasing and, generally, the camshaft should be advanced at low engine RPM and retarded as engine speed increases. The purpose of this project was to design and test a mechanically variable camshaft phasing device that retards the camshaft continuously over a given engine speed range as a function of engine speed. It was desired to design a device that would fit on an unmodified engine block utilizing an unmodified camshaft that could fit under a slightly modified timing cover. A conceptual design was developed based on analysis of various geometries. Computer simulations were employed to search for the optimal kinematic configuration that would give the device a minimal torque dependency. Several different types of springs were then analyzed using both computer models and static testing that would allow the device to operate over the desired range of engine speeds. A prototype variable cam phasing device was built and tested in a 1970\u27s model Chevrolet small-block V8 driven by the Mechanical Engineering Department\u27s engine dynamometer. The device exhibited unacceptable wear and fatigue characteristics in some areas of the device. However, the data that was gathered is encouraging and indicates that the prototype device represents a viable design

Review of George Marsden, A Short Life of Jonathan Edwards

Historian George M. Marsden\u27s piece on the life of American preacher and theologian Jonathan Edwards offers a biographical account as rich in insight as it is convenient in succinctness. The biography explores religion in colonial America up to the eve of revolution, as well as social and political developments surrounding the First Great Awakening, all through the lens of the Edwards\u27 experience and prolific influence