High voltage solar array study Final report

High voltage solar array stud

Remote sensing of changes in morphology and physiology of trees under stress

Measurements on foliage samples collected from several drought and salt treated plants revealed that leaf thickness decreased with increasing severity of the drought treatment and increased with increasing severity of treatment with NaCl, but remained essentially unaffected by treatment with CaCl2. Airborne data collected by multispectral scanner indicated that false color images provide selective enhancement of a diseased area. Comparison of simulated and actual aerial color and color IR photography revealed that the color renditions of the MSS simulations agreed closely with those of the actual photography

On The Orbital Evolution of Jupiter Mass Protoplanet Embedded in A Self-Gravity Disk

We performed a series of hydro-dynamic simulations to investigate the orbital migration of a Jovian planet embedded in a proto-stellar disk. In order to take into account of the effect of the disk's self gravity, we developed and adopted an \textbf{Antares} code which is based on a 2-D Godunov scheme to obtain the exact Reimann solution for isothermal or polytropic gas, with non-reflecting boundary conditions. Our simulations indicate that in the study of the runaway (type III) migration, it is important to carry out a fully self consistent treatment of the gravitational interaction between the disk and the embedded planet. Through a series of convergence tests, we show that adequate numerical resolution, especially within the planet's Roche lobe, critically determines the outcome of the simulations. We consider a variety of initial conditions and show that isolated, non eccentric protoplanet planets do not undergo type III migration. We attribute the difference between our and previous simulations to the contribution of a self consistent representation of the disk's self gravity. Nevertheless, type III migration cannot be completely suppressed and its onset requires finite amplitude perturbations such as that induced by planet-planet interaction. We determine the radial extent of type III migration as a function of the disk's self gravity.Comment: 19 pages, 13 figure

Remote sensing applications in forestry - Remote sensing of changes in morphology and physiology of trees under stress Annual progress report

Remote sensing of changes in morphology and physiology of trees under stres

Education Values of Farm Migrant Families

Study compares educational achievements of sons away from home and educational hopes for children still at home for three groups of families in Des Moines: (1) farm reared migrants, (2) Des Moines natives, and (3) urban reared migrants

Farm Migrants and Family Aid

Fifth article in the series on adjustments to city life of farm migrant families reports on the frequency of giving and receiving help of related families and obtaining advice on family, financial and emotionsal problems

Economic Success of Farm Migrants

Farm people who migrated to Des Moines held lower status jobs, earned less money, and lived in more modest homes when compared to urban migrants and lifetime residents. Why? This penetrating analysis explains how a lack of education has handicapped many farm migrants - and their children

Farm migrants to the city: A comparison of the status, achievement, community and family relations of farm migrants with urban migrants and urban natives in Des Moines, Iowa

Data on family composition, place of residence of husband and wife during the socialization period of childhood (age 5-19 years), educational attainment, and current age and occupation of husband were obtained from a random sample of 2,178 households in Des Moines, Iowa. The 1,693 households that included a married couple were divided fairly equally among four groups according to where the husband lived the majority of the years between the ages of 5 and 19: farm reared (26 percent), rural nonfarm reared (21 percent), urban reared (23 percent) and natives of Des Moines (30 percent). Wives were distributed similarly in relation to childhood residence, but the wives\u27 socialization experiences corresponded to the husbands\u27 in less than half of all cases. As a consequence, most couples represented mixed backgrounds: 46 percent contained at least one spouse with farm or rural background, and only 8.5 percent were composed of husbands and wives who always had lived in Des Moines

Family decision-making and role patterns among Iowa farm and nonfarm families

It is generally believed that semipatriarchal patterns characterized rural family life 100 years ago. Husbands and fathers made most of the important family decisions, and only a few family tasks were the joint responsibility of males and females. As part of the adjustment to new working and living conditions in the growing cities, urban family life over the past several generations has become organized around equalitarian decision-making between husbands and wives and around sharing of many family tasks. Many conditions in rural communities and family life also have been changing during this time. However, there is little information on differences in family decision-making or role patterns between rural and urban families. Research on this problem may be useful for assessing possible changes in rural values and for suggesting the degree to which rural and urban family life reflect common values of the total society