The Production of Ring-necked Pheasants in Winnebago County, lowa

In the fall of 1935, the Iowa Cooperative Wildlife Research Unit inaugurated field investigations on the ring-necked pheasant, Phasianus colchicus, on the Winnebago Research Area, sections 9-12, 13-16, and 21-24, Eden Township, Winnebago County. Early investigations (Green, 1938) were centered around winter mortality of pheasants and the improvement of habitat to alleviate winter losses. In 1939-41 intensive investigations were shifted to the nesting and production of the ring-necked pheasant on a 1520-acre plot lying within sections 13, 14, 15, 23 and 24 (Baskett, 1947). Although the pheasants were increasing in numbers during 1939 and 1940, in 1941 and accelerated rate of summer production was noted. Instead of the usual 150-175 percent rate of summer increase over the spring population, production jumped to 220 percent in spite of the largest observed spring density - 125 birds per section. A parallel rise in the 1941 rate of production was also recorded in North Dakota (Bach, 1944)

Scanning a photonic crystal slab nanocavity by condensation of xenon

Allowing xenon or nitrogen gas to condense onto a photonic crystal slab nanocavity maintained at 10–20 K results in shifts of the nanocavity mode wavelength by as much as 5 nm (~=4 meV). This occurs in spite of the fact that the mode defect is achieved by omitting three holes to form the spacer. This technique should be useful in changing the detuning between a single quantum dot transition and the nanocavity mode for cavity quantum electrodynamics experiments, such as mapping out a strong coupling anticrossing curve. Compared with temperature scanning, it has a much larger scan range and avoids phonon broadening

Vacuum rabi splitting using a single quantum dot in a photonic crystal slab nanocavity

We report the observation of vacuum-field Rabi splitting (true strong coupling) between a single InAs quantum dot and a single photon in the mode of a photonic crystal slab nanocavity

A Proposed Comparison of Fall Roadside Pheasant Counts and Flushing Rates

Although the fall roadside pheasant census (Bennett and Hendrickson, 1938) has reflected the fall pheasant population from an administrative standpoint for the past 17 years within the primary range in Iowa (Kozicky, et al., 1952), there still exist the problems of correlating these roadside counts to actual populations or flushing rates. Inasmuch as we do not have any known method of obtaining exact numbers of birds for a given ·section of land at the present time, we cannot develop a method of interpreting the roadside count as reflecting a mean number of birds per acre in the primary pheasant range within a, specified confidence limits. However, it may be possible to relate the index obtained from the roadside count to birds flushed per hour on a section of land. The evaluation would be of assistance to administrators and sportsmen alike. The sportsmen are interested in knowing just how many birds they can expect to flush in an hour of hunting, based on roadside counts, and the administrator would like confirmation on the correlation, if any, between the roadside count and flushing rates

Ecology of the Raccoon in Central Iowa

The marked increase of the Upper Mississippi Valley raccoon (Procyon lotor hirtus N. and G.) in Iowa during recent years 1s well-known. Sanderson (1951) and recent releases by the Iowa State Conservation Commission suggest a yearly average of about three or four times as many raccoons during the decade 1943-\u2752 as in the period 1933-\u2742. The general opinion of hunters and trappers was that such increases were apparent also in Story County, of central Iowa. From raccoon family track and other signs along streams Costa and Hendrickson estimated roughly two family groups of raccoons to the mile, or approximately 10 raccoons to the square mile traversed by the larger wooded streams in late summer, 1950. Cabalka through participation with three groups of hunters learned that in the autumn, 1951, on 30 square miles coursed by larger streams they took 79 raccoons averaging 17 pounds in weight, of which 41 were males and 38 females. The raccoons were taken at the rate of two an hour of group night hunting

Quantum dot photonic crystal nanocavities: Transition from weak to strong coupling and nonlinear emissions

Photonic crystal slab nanocavities containing one layer of quantum dots have exhibited: strong coupling to a single quantum dot; tuning by condensation of xenon gas; linewidth broadening due to ensemble dot absorption; gain and lasing