207 research outputs found
Portraying the Quest for Buddhist Wisdom?: A Comparative Study of The Matrix and Crouching Tiger, Hidden Dragon
This paper analyses the way in which the quest for Buddhist wisdom has been portrayed in The Matrix and Crouching Tiger, Hidden Dragon. Both films seek to explore the notion of hidden realities and both suggest that selflessness can enable the individual to overcome the material world. Furthermore, it is argued that the Buddhist concept of skillful means is not only employed by advanced practitioners in each of the films to ensure that central characters are on the path to true wisdom, but also that through careful cinematic manipulation the directors prompt the audience to question their own notions of reality
ARC FLASH DETECTION THROUGH VOLTAGE/CURRENT SIGNATURES
Arc Flash events occur due to faults in electrical equipment combined with a significant release of energy across an electrical arc. Due to the large energy release, plasma is generated, pressures increase, and the plasma expands. Under these conditions the plasma becomes excited enough to liquefy metal causing physical damage to equipment and any humans in the vicinity.
This thesis investigates the state of art for detection of arc flash events and investigates a method of improving detection reliability, and speed by monitoring the high frequency voltage / current patterns utilizing methods similar to arc flash circuit interrupters (AFCI). A second alternative detection approach is determined through analysis of the physics of plasma development. The current state of art is based upon light detection. However this thesis experimentally investigates what happens before the arc event emits visible light.
The results show that current flows to ground during an arc event slightly prior to the production of light. Further it shows through analysis of the physics of plasma that a high speed plasma detector has the potential to identify an arc event before the presence of visible light. Through the design and construction of experimental test setups, and physics analysis, this thesis provides new paths for detecting arc events that present opportunities to improve detection time
Reguetón a lo cubano: ¿una agresión a la cultura nacional?
Este artículo investiga el boom reciente del reguetón enLa Habana, Cuba. Los debates sobre la relación entre elreguetón y la cultura nacional cubana toman un lugarcentral. Se examina la continuidad respecto a las tradicionesmusical y lírica cubanas, sobre todo la rumba,y se resalta los desafíos en el ámbito del performance yla economía musical. También se examinan la políticadel Estado y el significado sociopolítico del reguetónse consideran
The Ecology of 'Helicoverpa Punctigera': Adaptations for a Changeable Climate
The native budworm 'Helicoverpa punctigera' is an important pest of field crops in Australia alongside the cotton bollworm 'Helicoverpa armigera', and both share a number of host plants. 'H. punctigera' moths are known to migrate into cropping regions, from inland Queensland, Western Australia and South Australia but multi-year weather perturbations such as the Millennium drought may have reduced migration from drought-stricken areas in inland Queensland. Resistance management in Bt cotton may be at risk from reduced migration as migrants dilute any resistance genes that might be present in 'H. punctigera' that have been exposed to Bt toxins. In southeast Australia 'H. punctigera' appears to be becoming more abundant later in the cotton growing season, and thus, the overwintering ecology of 'H. punctigera' needs to be re-examined. Laboratory studies were conducted under a range of temperatures and photoperiods to determine under what conditions diapause occurs in 'H. punctigera', and to compare the results with similar published studies. At 25°C the least amount of diapause was induced at 14L:10D, and the highest percentage of diapause at 12L:12D. Temperatures of a constant 19°C or cooler produced the highest percentages of diapause, even under a summer 14L:10D photoperiod. At 12L:12D photoperiod the highest percentages of diapause were induced at temperatures below 19°C. Larvae and pupae moved from 25°C to 19°C showed an increase in diapause levels while larvae moved from 19°C to 25°C did not. A statistical model was created from my data, showing the significant effects of temperature, photoperiod, and photoperiod-temperature interaction on diapause induction
Necessary condition for steerability of arbitrary two-qubit states with loss
Einstein-Podolsky-Rosen steering refers to the quantum phenomenon whereby the
state of a system held by one party can be "steered" into different states at
the will of another, distant, party by performing different local measurements.
Although steering has been demonstrated in a number of experiments involving
qubits, the question of which two-qubit states are steerable remains an open
theoretical problem. Here, we derive a necessary condition for any two-qubit
state to be steerable when the steering party suffers from a given probability
of qubit loss. Our main result finds application in one-way steering
demonstrations that rely upon loss. Specifically, we apply it to a recent
experiment on one-way steering with projective measurements and POVMs, reported
by Wollmann et. al. [Phys. Rev. Lett., 116, 160403 (2016)].Comment: 7 pages, 1 figur
Wildfire impact : natural experiment reveals differential short-term changes in soil microbial communities
A wildfire which overran a sensor network site provided an opportunity (a natural experiment) to monitor short-term post-fire impacts (immediate and up to three months post-fire) in remnant eucalypt woodland and managed pasture plots. The magnitude of fire-induced changes in soil properties and soil microbial communities was determined by comparing (1) variation in fire-adapted eucalypt woodland vs. pasture grassland at the burnt site; (2) variation at the burnt woodland-pasture sites with variation at two unburnt woodland-pasture sites in the same locality; and (3) temporal variation pre- and post-fire. In the eucalypt woodland, soil ammonium, pH and ROC content increased post-fire, while in the pasture soil, soil nitrate increased post-fire and became the dominant soluble N pool. However, apart from distinct changes in N pools, the magnitude of change in most soil properties was small when compared to the unburnt sites. At the burnt site, bacterial and fungal community structure showed significant temporal shifts between pre- and post-fire periods which were associated with changes in soil nutrients, especially N pools. In contrast, microbial communities at the unburnt sites showed little temporal change over the same period. Bacterial community composition at the burnt site also changed dramatically post-fire in terms of abundance and diversity, with positive impacts on abundance of phyla such as Actinobacteria, Proteobacteria and Firmicutes. Large and rapid changes in soil bacterial community composition occurred in the fire-adapted woodland plot compared to the pasture soil, which may be a reflection of differences in vegetation composition and fuel loading. Given the rapid yet differential response in contrasting land uses, identification of key soil bacterial groups may be useful in assessing recovery of fire-adapted ecosystems, especially as wildfire frequency is predicted to increase with global climate change
Searching for Sharp Drops in the Incidence of Pandemic A/H1N1 Influenza by Single Year of Age
BACKGROUND During the 2009 H1N1 pandemic (pH1N1), morbidity and mortality sparing was observed among the elderly population; it was hypothesized that this age group benefited from immunity to pH1N1 due to cross-reactive antibodies generated from prior infection with antigenically similar influenza viruses. Evidence from serologic studies and genetic similarities between pH1N1 and historical influenza viruses suggest that the incidence of pH1N1 cases should drop markedly in age cohorts born prior to the disappearance of H1N1 in 1957, namely those at least 52-53 years old in 2009, but the precise range of ages affected has not been delineated. METHODS AND FINDINGS To test for any age-associated discontinuities in pH1N1 incidence, we aggregated laboratory-confirmed pH1N1 case data from 8 jurisdictions in 7 countries, stratified by single year of age, sex (when available), and hospitalization status. Using single year of age population denominators, we generated smoothed curves of the weighted risk ratio of pH1N1 incidence, and looked for sharp drops at varying age bandwidths, defined as a significantly negative second derivative. Analyses stratified by hospitalization status and sex were used to test alternative explanations for observed discontinuities. We found that the risk of laboratory-confirmed infection with pH1N1 declines with age, but that there was a statistically significant leveling off or increase in risk from about 45 to 50 years of age, after which a sharp drop in risk occurs until the late fifties. This trend was more pronounced in hospitalized cases and in women and was independent of the choice in smoothing parameters. The age range at which the decline in risk accelerates corresponds to the cohort born between 1951-1959 (hospitalized) and 1953-1960 (not hospitalized). CONCLUSIONS The reduced incidence of pH1N1 disease in older individuals shows a detailed age-specific pattern consistent with protection conferred by exposure to influenza A/H1N1 viruses circulating before 1957.The project described was supported by the National Institute Of General Medical Sciences [Award Number U54GM088558], http://www.nigms.nih.
gov/. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute Of General Medical
Sciences or the National Institutes of Health. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the
manuscript
Scalable multiparty steering based on a single pair of entangled qubits
The distribution and verification of quantum nonlocality across a network of
users is essential for future quantum information science and technology
applications. However, beyond simple point-to-point protocols, existing methods
struggle with increasingly complex state preparation for a growing number of
parties. Here, we show that, surprisingly, multiparty loophole-free quantum
steering, where one party simultaneously steers arbitrarily many spatially
separate parties, is achievable by constructing a quantum network from a set of
qubits of which only one pair is entangled. Using these insights, we
experimentally demonstrate this type of steering between three parties with the
detection loophole closed. With its modest and fixed entanglement requirements,
this work introduces a scalable approach to rigorously verify quantum
nonlocality across multiple parties, thus providing a practical tool towards
developing the future quantum internet
Recommended from our members
Searching for Sharp Drops in the Incidence of Pandemic A/H1N1 Influenza by Single Year of Age
Background: During the 2009 H1N1 pandemic (pH1N1), morbidity and mortality sparing was observed among the elderly population; it was hypothesized that this age group benefited from immunity to pH1N1 due to cross-reactive antibodies generated from prior infection with antigenically similar influenza viruses. Evidence from serologic studies and genetic similarities between pH1N1 and historical influenza viruses suggest that the incidence of pH1N1 cases should drop markedly in age cohorts born prior to the disappearance of H1N1 in 1957, namely those at least 52–53 years old in 2009, but the precise range of ages affected has not been delineated. Methods and Findings: To test for any age-associated discontinuities in pH1N1 incidence, we aggregated laboratory-confirmed pH1N1 case data from 8 jurisdictions in 7 countries, stratified by single year of age, sex (when available), and hospitalization status. Using single year of age population denominators, we generated smoothed curves of the weighted risk ratio of pH1N1 incidence, and looked for sharp drops at varying age bandwidths, defined as a significantly negative second derivative. Analyses stratified by hospitalization status and sex were used to test alternative explanations for observed discontinuities. We found that the risk of laboratory-confirmed infection with pH1N1 declines with age, but that there was a statistically significant leveling off or increase in risk from about 45 to 50 years of age, after which a sharp drop in risk occurs until the late fifties. This trend was more pronounced in hospitalized cases and in women and was independent of the choice in smoothing parameters. The age range at which the decline in risk accelerates corresponds to the cohort born between 1951–1959 (hospitalized) and 1953–1960 (not hospitalized). Conclusions: The reduced incidence of pH1N1 disease in older individuals shows a detailed age-specific pattern consistent with protection conferred by exposure to influenza A/H1N1 viruses circulating before 1957
- …