Optimizing the ratio of captures to trapping effort in a black rat Rattus rattus control programme in New Zealand

The ratio of captures to unit effort is an important cost/benefit measure for volunteer pest control programmes. We describe an experiment designed to investigate the use of pre-feeding and trap pulsing as possible means of increasing this ratio. In 20 traps locked-open and pre-fed with non-toxic pellets for five days, the same number of black rats was caught over the next 5 days as in 20 non pre-fed traps set for the whole 10 days (32 rats each). Allowing for successful traps being unavailable for an average of half a night each, the capture rate in the pre-fed traps was 47% over five days, more than double that in the non pre-fed traps set for twice as long (total 19% in 10 days)

Breast support garments are ineffective at reducing breast motion during an aqua aerobics jumping exercise

The buoyant forces of water during aquatic exercise may provide a form of ‘natural’ breast support and help to minimise breast motion and alleviate exercise induced breast pain. Six larger-breasted females performed standing vertical land and water-based jumps, whilst wearing three breast support conditions. Underwater video cameras recorded the motion of the trunk and right breast. Trunk and relative breast kinematics were calculated as well as exercised induced breast pain scores. Key results showed that the swimsuit and sports bra were able to significantly reduce the superioinferior breast range of motion by 0.04 and 0.05 m, respectively, and peak velocity by 0.23 and 0.33 m/s, respectively, during land-based jumping when compared to the bare-breasted condition, but were ineffective at reducing breast kinematics during water-based jumping. Furthermore, the magnitude of the swimsuit superioinferior breast range of motion during water-based jumping was significantly greater than land-based jumping (0.13 m and 0.06 m), yet there were no significant differences in exercise induced breast pain, thus contradicting previously published relationships between these parameters on land. Furthermore, the addition of an external breast support garment was able to reduce breast kinematics on land but not in water, suggesting the swimsuit and sports bras were ineffective and improvements in swimwear breast support garments may help to reduce excessive breast motion during aqua aerobic jumping exercises

Acute changes in clinical breast measurements following bra removal:implications for surgical practice

AbstractBackgroundStable measurement of breast position is crucial for objective pre-operative planning and post-operative evaluation. In clinical practice, breast measures are often taken immediately following bra removal. However, research shows that restrictive clothing (such as a bra) can cause acute anatomical changes, leading to the hypothesis that clinical breast measures may change over time following bra removal. This cross-sectional observational study aimed to provide simple clinical guidelines for the measurement of breast position which account for any acute changes in breast position following bra removal.MethodsThirteen participants of varying breast sizes had markers attached to their thorax and nipples to determine clinical measures of sternal notch to nipple distance, internipple distance, breast projection, and vertical nipple position. The positions of these landmarks were recorded using a motion capture system during 10 min of controlled sitting following bra removal.ResultsInternipple distance and breast projection remained unchanged over 10 min, while the resultant sternal notch to nipple distance extended by 2.8 mm in 299 s (right) and 3.7 mm in 348 s (left). The greatest change occurred in the vertical nipple position, which migrated an average of 4.1 mm in 365 s (right) and 6.6 mm in 272 s (left), however, for one participant vertical migration was up to 20 mm.ConclusionsInternipple distance and breast projection can be measured first following bra removal, followed by sternal notch to nipple distance, any measures associated with the vertical nipple position should be made more than 6 min after bra removal. These guidelines have implications for breast surgery, particularly for unilateral reconstruction based on the residual breast position

Cold War by “Other Means”: Canada’s Foreign Relations with Communist Eastern Europe, 1957-1963

Following Joseph Stalin’s death in 1953, Nikita Khrushchev became leader of the Soviet Union and ushered in a liberalization campaign that reverberated outward to certain Eastern European nations. Canadian officials recognized that limited freedom of maneuver was conceded to certain Eastern European nations, in addition to Yugoslavia’s existing independent position. This proved important, as Communist Eastern Europe became a deliberate and considered factor in Canada’s foreign policy. Canadian Soviet policy thus evolved into a Canadian policy towards Communist Eastern Europe, equipped with various nuances. Specifically, this project examines Canadian policy with Yugoslavia, Poland, and the Soviet Union. By the mid 1950s, a general strategic stasis existed in the Cold War, which led to something of a political balance; as a result, discovering strategies to engage in the Cold War by “other means” became necessary. Prime Minister John Diefenbaker’s Progressive Conservative government was committed to preventing the spread of communism, and this was an integral component of its foreign policy with Communist Eastern Europe. This dissertation argues Canadian policy towards Communist Eastern Europe during the Diefenbaker-Khrushchev period was not solely driven by traditional geopolitical and geostrategic considerations, but was also concerned with non-military Communist tactics. As a result, Canadian officials pursued closer political, economic, and socio-cultural bilateral relations with select Communist Eastern European countries in order to challenge Soviet hegemony in that region and to combat Eastern European communism generally. Despite the differences among Poland, Yugoslavia, and the USSR, Canada’s broad policy objective was consistent: promote positive relations to expose Communist nations to Western modalities in hopes of lessening communist influence globally. The Canadian government during this period did not have a “grand strategy” that governed its policy with the region. Instead, pragmatism prevailed as a number of ad hoc developments in the fields of economic and cultural foreign relations contributed to the growing sense that Canada was engaged in Cold War diplomacy by “other means.