159,402 research outputs found
Let\u27s Observe!
Teaching the non-science major how to teach science is a challenge! No matter what science course is being taught, professors must model good teaching strategies that promote an inquiry approach that incorporates prior knowledge, connections, a social environment, relevance, and time to actively construct new understandings of scientific concepts
Abundance and Identification of the Leafmining Guild on Apple in the Mid-Atlantic States
The leafmining guild on apple in the northeastern United States was studied from 1983 to 1988. Ten species of leafminers, all Lepidoptera, were encountered during the sampling. Phyllonorycter spp. (P. blancardella and P. crataegella) were the most ubiquitous and most abundant throughout the region. Lyonetia speculella was also abundant in both managed and unmanaged orchards, indicating a potential to become a pest. Bucculatrix pomiloliella and Coptodisca splendorilerella were abundant in unmanaged orchards, but were only rarely found in managed orchards. Coleophora serratella, Stigmella pomivorella, Parornix geminatella, Tischeria malifoliella, and Recurvaria nanella were also found. A key to the most important leafminer species on apple in the mid-Atlantic states, based on leafmine characteristics, is presented
Half-BPS SU(N) Correlators in N=4 SYM
In this note we study half-BPS operators in N=4 super Yang-Mills for gauge
group SU(N) at finite N. In particular we elaborate on the results of
hep-th/0410236, providing an exact formula for the null basis operators
algorithmically constructed there. For gauge groups U(N) and SU(N) we show that
this basis is dual to the basis of multi-trace operators with respect to the
two point function. We use this to extend the results of hep-th/0611290
concerning factorisation and probabilities from U(N) to SU(N). We also give a
construction for a separate diagonal basis of the SU(N) operators in terms of
the higher Hamiltonians of the complex matrix model reduction of this sector.Comment: LaTeX, 15 pages; comments added on large N limi
Reduced gravity fecal collector seat and urinal
A waste collection system for use in a reduced gravity including a seat having an opening centrally located with a pair of opposed depressed valleys on opposite sides of said opening for accommodating the ischial tuberosities of a user. The seat has contoured surfaces for providing support of the user's body and includes a prominent ridge towards the rear, which provides forward-aft positioning cue to the user. A curved recess is provided adjacent the forward portion of the seat for accommodating a tubular urinal having an enlarged open mouth
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