The Value of a Liberal Arts Education: A Self-Evident Truth

We hold this truth to be self-evident: The best preparation for 21st Century workplace challenges is to earn a liberal arts degree or a professional degree that is grounded in and inspired by the liberal arts

Building the Future - One College Graduate at a Time

The past few weeks have been a time of reflection for me. My father died and my family experienced what all families do when they lose the man who provided for them, guided them, protected them, and — in my case — made sure we fully understood the value of a college education

Higher Ed International Exchange Rate Leaves Intellectual Capital Behind

The higher education “international exchange rate” is unfavorable and improving at an alarmingly slow rate, given our need for graduates prepared for success in our contemporary global economy. There are basically two problems: not enough U.S. students are studying abroad and the opportunity to study abroad is disproportionately available to traditional students enrolled at private institutions

A Descriptive Study of the Trends and Issues in Vocational and Technical Education in the Virginia Community College System

With the purpose of determining the current issues and tends in vocational and technical education at Virginia\u27s community colleges, this study was developed with three research questions (goals) in mind. They are: 1. To research the historical foundations of curriculum offerings in Virginia\u27s community colleges; 2. To research national issues and trends affecting vocational and technical education in community colleges; 3. To compare the issues and trends in Virginia\u27s community colleges as perceived by division chairs and selected deans with national issues and trends as identified from a review of the literature

Interpretation of cosmic ray composition: The pathlength distribution

For abstract see A81-43868

Apollo helmet dosimetry experiments Final report

Procedure for measuring heavy cosmic ray particles directly incident on spacecrew

Space environment and lunar surface processes, 2

The top few millimeters of a surface exposed to space represents a physically and chemically active zone with properties different from those of a surface in the environment of a planetary atmosphere. To meet the need or a quantitative synthesis of the various processes contributing to the evolution of surfaces of the Moon, Mercury, the asteroids, and similar bodies, (exposure to solar wind, solar flare particles, galactic cosmic rays, heating from solar radiation, and meteoroid bombardment), the MESS 2 computer program was developed. This program differs from earlier work in that the surface processes are broken down as a function of size scale and treated in three dimensions with good resolution on each scale. The results obtained apply to the development of soil near the surface and is based on lunar conditions. Parameters can be adjusted to describe asteroid regoliths and other space-related bodies

Space environment and lunar surface processes

The development of a general rock/soil model capable of simulating in a self consistent manner the mechanical and exposure history of an assemblage of solid and loose material from submicron to planetary size scales, applicable to lunar and other space exposed planetary surfaces is discussed. The model was incorporated into a computer code called MESS.2 (model for the evolution of space exposed surfaces). MESS.2, which represents a considerable increase in sophistication and scope over previous soil and rock surface models, is described. The capabilities of previous models for near surface soil and rock surfaces are compared with the rock/soil model, MESS.2

Investigations of lunar materials Final report

Lunar rock erosion estimatio

Laboratory measurements and model sensitivity studies of dust deposition ice nucleation

We investigated the ice nucleating properties of mineral dust particles to understand the sensitivity of simulated cloud properties to two different representations of contact angle in the Classical Nucleation Theory (CNT). These contact angle representations are based on two sets of laboratory deposition ice nucleation measurements: Arizona Test Dust (ATD) particles of 100, 300 and 500 nm sizes were tested at three different temperatures (−25, −30 and −35 °C), and 400 nm ATD and kaolinite dust species were tested at two different temperatures (−30 and −35 °C). These measurements were used to derive the onset relative humidity with respect to ice (RH<sub>ice</sub>) required to activate 1% of dust particles as ice nuclei, from which the onset single contact angles were then calculated based on CNT. For the probability density function (PDF) representation, parameters of the log-normal contact angle distribution were determined by fitting CNT-predicted activated fraction to the measurements at different RH<sub>ice</sub>. Results show that onset single contact angles vary from ~18 to 24 degrees, while the PDF parameters are sensitive to the measurement conditions (i.e. temperature and dust size). Cloud modeling simulations were performed to understand the sensitivity of cloud properties (i.e. ice number concentration, ice water content, and cloud initiation times) to the representation of contact angle and PDF distribution parameters. The model simulations show that cloud properties are sensitive to onset single contact angles and PDF distribution parameters. The comparison of our experimental results with other studies shows that under similar measurement conditions the onset single contact angles are consistent within ±2.0 degrees, while our derived PDF parameters have larger discrepancies