Gustatory pheromones regulate mating behaviors in Drosophila melanogaster and represent an important model for understanding how sensory stimuli can drive behavior. However, the genes and cells involved in pheromone detection have remained poorly...
Visual searches for a conjunction of features (e.g., a particular combination of color and shape) are ordinarily slow and difficult. However, search efficiency for a particular conjunction can improve dramatically within a few hundred practice...
Circadian rhythms. Proteins -- Synthesis -- Effect of light on. Genetic regulation. Neurospora crassa -- Reproduction -- Effect of light on. Neurospora crassa -- Genetics.
To understand how the circadian clock can temporally organize a cell, the biochemical characterization of a clock protein, FRQ, was initiated in Neurospora crassa using immunochemical techniques. FRQ accumulated in constant light to maximum levels...
Earlier work has suggested that various neurological or neuropsychiatric disorders may result in characteristic spatial patterns in brain activation, potentially allowing their detection from maps of brain activity under different conditions....
Sponges are a historically ambiguous taxon, often considered primitively simple representatives of early Metazoa, living fossils from the era before the complex morphological features of the bilaterian phyla appeared in the Cambrian. Yet recent...
Forest ecology -- Northeastern States. ; Forest canopy ecology -- Northeastern States. ; Forest dynamics -- Northeastern States.
In closed-canopy forests, changes in the relative abundance of tree species due to major disturbance or to its absence are thought to be governed principally by differences among component species in the performance of juveniles. However, few...
Type 4 prepilins and prepilin-like-proteins are secreted by a wide range of bacterial species and are required for a variety of functions including type 4 pilus (Tfp) formation, toxin and other enzyme secretion, gene transfer, and biofilm...
Lowest order charged particle motion in the Earth''s magnetosphere can be explained using simple adiabatic theory. However, nonadiabatic theory is required to explain particle behavior in cases such as when the particle's gyroradius is large...
Calanus finmarchicus -- Georges Bank. ; Calanus finmarchicus -- Maine Gulf of. ; Calanus finmarchicus -- North Atlantic Ocean.
Calanus finmarchicus, a kind of marine zooplankton, plays an important ecological role throughout the North Atlantic. Striking seasonal variations exist in its abundance and distribution in the Gulf of Maine/Georges Bank region. On the Bank in...
The problem of perceived annoyance as a function of number of noise events and maximum noise level was investigated in a series of seven laboratory experiments. Four models were tested: the Equal Energy Model, the Scandinavian Model, the Variance...
Problem Statement: Increasing physical activity is a priority for decreasing obesity rates, but we have a limited understanding of which factors are most influential in promoting physical activity among adolescents. We also do not know what forms...
A new algorithm is presented which uses maximum likelihood (ML) estimation and convex constraints to restore edge information in a robust and accurate way for microscope images. The convex constraints are spatially variant bounds on the image...
Kynurenic acid (KYNA) is produced and released by astrocytes, and acts as an α7-nicotinic acetylcholine receptor antagonist (at lower, physiological concentrations) and an antagonist of the glycine site of the NMDA receptor (at higher,...
Forest ecology -- New Hampshire -- Hubbard Brook Experimental Forest. Lepidoptera -- New Hampshire -- Hubbard Brook Experimental Forest. Forest insects -- New Hampshire -- Hubbard Brook Experimental Forest. Insect populations -- New Hampshire --...
One of the principle aims of ecology is to understand variations in organism abundance over time. Some species and species assemblages exhibit exceptionally dynamic changes in abundance or biomass, while other species and species assemblages are...
Large scale systems -- Mathematical models. Digital computer simulation. Parallel processing (Electronic computers). Computer algorithms.
Modeling real-world large-scale systems is inherently challenging due to their size and complexity. Detailed simulation of large-scale models requires tremendous amounts of computing power and memory space. Parallel discrete-event simulation...
College Life 5; sign on window for measles vaccinations; The conception of measles as a relatively routine childhood disease was at distinct odds with the situation on campus this spring. One student case in early April had led to 20 by mid-May,...