4,271 research outputs found
With All My Worldly Goods I Thee Endow, or Maybe Not: A Reevaluation of the Uniform Premarital Agreement Act After Three Decades
Limitations Imposed by Family Law on a Separated Parent’s Ability to Make Significant Life Decisions: A Comparison of Relocation and Income Imputation
Pulsed laser deposition growth of Fe3O4 on III–V semiconductors for spin injection
We report on the growth of thin layers of Fe3O4 on GaAs and InAs by pulsed laser deposition. It is found that Fe3O4 grows epitaxially on InAs at a temperature of 350 °C. X-ray photoelecton spectroscopy (XPS) studies of the interface show little if any interface reaction resulting in a clean epitaxial interface. In contrast, Fe3O4 grows in columnar fashion on GaAs, oriented with respect to the growth direction but with random orientation in the plane of the substrate. In this case XPS analysis showed much more evidence of interface reactions, which may contribute to the random-in-plane growth
The most massive galaxies in clusters are already fully grown at
By constructing scaling relations for galaxies in the massive cluster
MACSJ0717.5 at and comparing with those of Coma, we model the
luminosity evolution of the stellar populations and the structural evolution of
the galaxies. We calculate magnitudes, surface brightnesses and effective radii
using HST/ACS images and velocity dispersions using Gemini/GMOS spectra, and
present a catalogue of our measurements for 17 galaxies. We also generate
photometric catalogues for galaxies from the HST imaging. With
these, we construct the colour-magnitude relation, the fundamental plane, the
mass-to-light versus mass relation, the mass-size relation and the
mass-velocity dispersion relation for both clusters. We present a new, coherent
way of modelling these scaling relations simultaneously using a simple physical
model in order to infer the evolution in luminosity, size and velocity
dispersion as a function of redshift, and show that the data can be fully
accounted for with this model. We find that (a) the evolution in size and
velocity dispersion undergone by these galaxies between and is mild, with and , and (b) the stellar populations are old, Gyr,
with a Gyr dispersion in age, and are consistent with evolving purely
passively since with . The implication is that these galaxies formed their stars early and
subsequently grew dissipationlessly so as to have their mass already in place
by , and suggests a dominant role for dry mergers, which may have
accelerated the growth in these high-density cluster environments.Comment: 20 pages; accepted for publication in MNRA
Understanding the Different Phosphorus Indices in Nutrient Management Planning
Terminology in soil fertility and nutrient management Extension programming has evolved with increasing society emphasis on agriculture and environment interactions. Management of nutrient phosphorus (P) is important to agricultural environmental stewardship. Primarily, the term Phosphorus Index has two different meanings in nutrient management planning: the traditional use describes categories of plant response in soil test recommendations; the newer use describes a method of ascribing P movement risk in the landscape. Occasionally the term is used differently in soil science than these two examples. Extension personnel, agronomists, and technical personnel should use the appropriate terms to avoid confusing clientele
Meeting the Educational Needs of Professional Crop Advisers Using Extended Workshops
The International Certified Crop Adviser program has created a demand for continuing agronomic education for professional practitioners. An annual short course at Mississippi State University provides quality instruction in quantities sufficient for CCA registrants to maintain their professional registration. Faculty from the universities, industry, government, and concerned stakeholder entities provide diverse, up-to-the minute instruction for participants. Participants in the workshops indicate they appreciate the content, coordination, diversity, and logistics of the programming. This and similar workshops are becoming more widespread as the CCA program matures and local Extension Services refine their relationship with it
Professional Meetings: Planning and Performing Multiple Location Tours for Maximum Benefit and Impact
State, regional, national, and international meetings in agricultural and natural resource professions often include educational tours in or near the host city. Education improves if the tours are well-planned and executed. Contingency planning is integral to the process; plan for bad things to occur. Evaluation planning, implementation, and communication are tools for improving future professional meeting tours
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