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Search Results: 1 - 10 of 1721 matches for " Nicky Dean "
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Polaronic conductivity in the photoinduced phase of 1T-TaS2
Nicky Dean,Jesse Petersen,Daniele Fausti,Ra'anan I. Tobey,Stefan Kaiser,Lev Gasparov,Helmuth Berger,Andrea Cavalleri
Physics , 2010, DOI: 10.1103/PhysRevLett.106.016401
Abstract: The transient optical conductivity of photoexcited 1T-TaS2 is determined over a three-order-of-magnitude frequency range. Prompt collapse and recovery of the Mott gap is observed. However, we find important differences between this transient metallic state and that seen across the thermally-driven insulator-metal transition. Suppressed low-frequency conductivity, Fano phonon lineshapes, and a mid-infrared absorption band point to polaronic transport. This is explained by noting that the photo-induced metallic state of 1T-TaS2 is one in which the Mott gap is melted but the lattice retains its low-temperature symmetry, a regime only accessible by photo-doping.
Hard bodies and sidelong looks: Spectacle and fetish in 1980s action cinema
Nicky Falkof
Excursions , 2010,
Abstract: From Stallone and Schwarzenegger to Gibson and Willis, the Hollywood action star of the 1980s was a hard-bodied hero with an attitude to match. But more than this, the action hero was an ideological construct; referenced by the president, ubiquitous in popular cultural production and reception of the time, his excessive muscularity forms a complex and problematic textual canvas for reading the hegemonic desires of Reaganite America. I this paper I consider cinematic relations to the heroic body through the dual prism of Freud’s conception of fetishism and De Bord’s formulation of the spectacle. Using the work of film theorists like Metz and Mulvey, cultural historians Susan Jeffords and Yvonne Tasker and psychoanalyst Kaja Silverman, I illustrate that the hero’s spectacular body operates as a fetish for the viewer, and thus that spectacle is fetish. Films to be considered include Rambo, Terminator and the Lethal Weapon and Die Hard series.
Semi-infinite TASEP with a Complex Boundary Mechanism
Nicky Sonigo
Mathematics , 2009, DOI: 10.1007/s10955-009-9823-0
Abstract: We consider a totally asymmetric exclusion process on the positive half-line. When particles enter in the system according to a Poisson source, Liggett has computed all the limit distributions when the initial distribution has an asymptotic density. In this paper we consider systems for which particles enter at the boundary according to a complex mechanism depending on the current configuration in a finite neighborhood of the origin. For this kind of models, we prove a strong law of large numbers for the number of particles entered in the system at a given time. Our main tool is a new representation of the model as a multi-type particle system with infinitely many particle types.
Dual inoculation of salt tolerant Bradyrhizobium and Glomus mosseae for improvement of Vigna radiata L. cultivation in saline areas of West Bengal, India  [PDF]
Nicky Singh, Nirmalendu Samajpati, Amal Kanti Paul
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.24053
Abstract: This study is aimed as to evaluate the interaction between salt tolerant Bradyrhizobium sp. and Glomus mosseae in the rhizosphere of legume crop Vigna radiata L. under pot culture and field conditions in different saline zones of West Bengal, India. Bradyrhizobium sp. when inoculated alone showed marked increase in number of nodules, root and shoot length, total plant biomass, arbuscular mycorrhizal fungal (AMF) colonization and population etc. when compared with plants inoculated only with AMF. However, when used in combination, the in oculants showed marked change in the above mentioned parameters over single inoculation of both salt tolerant AM fungi and Bradyrhizobium. These results suggest that AMF along with Bradyrhizobium can greatly help in establishment of V. radiata L. cultivation in the saline soils of West Bengal, India. The increased production of the legume crop could also lead to further benefit of the poor farmers by up lifting their socio-economic conditions with the net profit achieved by cultivating this crop in saline stress condition of West Bengal as a second crop during rabi season.
Effect of Phacoemulsification on Intraocular Pressure Control in Primary Open Angle Glaucoma Previously Treated by Trabeculectomy: A Case-Control Study  [PDF]
Samir Aziz, Nicky Spiers, Jeffrey Jay
Open Journal of Ophthalmology (OJOph) , 2012, DOI: 10.4236/ojoph.2012.22004
Abstract: Purpose: To analyse the effect of phacoemulsification on the control of intraocular pressure in primary open angle glaucoma in patients having phacoemulsification after previous trabeculectomy and compare them with a control group who had trabeculectomy alone. Patients and Methods: Twenty one patients (one eye from each) who had phacoemulsification subsequent to trabeculectomy were identified, and compared with 41 controls. Intraocular pressure, bleb appearance, glaucoma medications, iris manipulation and complications were recorded. Each patient was followed for full 12 months. Failure of control was defined as follows: 1) intraocular pressure >21 mm Hg on medication, or 2) a greater number of glaucoma medications than before phacoemulsification. Results: The post operative change in intraocular pressure in the case group at 12 months was much less than that in the control (p = 0.001). The mean intraocular pressure had changed from 15.3 mm Hg to 14.7 mm Hg. The control group showed an average intraocular pressure reduction of 6 mm Hg at the last visit (p > 0.001). In phacoemulsification group, 19% required 1 or 2 glaucoma medications at one year follow-up vs 19.5% in the control group. In phacoemulsification group, 9.5% showed flattening of a previously formed bleb at the last visit (P < 0.001), compared with 9.7% of controls. Conclusions: The stability of glaucoma control in the first year after phacoemulsification in previously filtered eyes with primary open angle glaucoma is comparable to that of the natural course after trabeculectomy. The study is limited by the small number of cases available.
Uncertain borders: the TRC and the (un)making of public myths
Madeleine Fullard,Nicky Rousseau
Kronos (Bellville) , 2008,
Abstract:
The Effect of Simulating Different Intermediate Host Snail Species on the Link between Water Temperature and Schistosomiasis Risk
Nicky McCreesh, Mark Booth
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0087892
Abstract: Introduction A number of studies have attempted to predict the effects of climate change on schistosomiasis risk. The importance of considering different species of intermediate host snails separately has never previously been explored. Methods An agent-based model of water temperature and Biomphalaria pfeifferi population dynamics and Schistosoma mansoni transmission was parameterised to two additional species of snail: B. glabrata and B. alexandrina. Results Simulated B. alexandrina populations had lower minimum and maximum temperatures for survival than B. pfeifferi populations (12.5–29.5°C vs. 14.0–31.5°C). B. glabrata populations survived over a smaller range of temperatures than either B. pfeifferi or B. alexandrina (17.0°C–29.5°C). Infection risk peaked at 16.5°C, 25.0°C and 19.0°C respectively when B. pfeifferi, B. glabrata and B. alexandrina were simulated. For all species, infection risk increased sharply once a minimum temperature was reached. Conclusions The results from all three species suggest that infection risk may increase dramatically with small increases in temperature in areas at or near the currents limits of schistosome transmission. The effect of small increases in temperature in areas where schistosomiasis is currently found will depend both on current temperatures and on the species of snail acting as intermediate host(s) in the area. In most areas where B. pfeifferi is the host, infection risk is likely to decrease. In cooler areas where B. glabrata is the host, infection risk may increase slightly. In cooler areas where B. alexandrina is the host, infection risk may more than double with only 2°C increase in temperature. Our results show that it is crucial to consider the species of intermediate host when attempting to predict the effects of climate change on schistosomiasis.
The Effect of Increasing Water Temperatures on Schistosoma mansoni Transmission and Biomphalaria pfeifferi Population Dynamics: An Agent-Based Modelling Study
Nicky McCreesh, Mark Booth
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0101462
Abstract: Introduction There is increasing interest in the control and elimination of schistosomiasis. Little is known, however, about the likely effects of increasing water-body temperatures on transmission. Methods We have developed an agent-based model of the temperature-sensitive stages of the Schistosoma and intermediate host snail life-cycles, parameterised using data from S. mansoni and Biomphalaria pfeifferi laboratory and field-based observations. Infection risk is calculated as the number of cercariae in the model, adjusted for their probability of causing infection. Results The number of snails in the model is approximately constant between 15–31°C. Outside this range, snail numbers drop sharply, and the snail population cannot survive outside the range 14–32°C. Mean snail generation time decreases with increasing temperature from 176 days at 14°C to 46 days at 26°C. Human infection risk is highest between 16–18°C and 1pm and 6–10pm in calm water, and 20–25°C and 12–4pm in flowing water. Infection risk increases sharply when temperatures increase above the minimum necessary for sustained transmission. Conclusions The model suggests that, in areas where S. mansoni is already endemic, warming of the water at transmission sites will have differential effects on both snails and parasites depending on abiotic properties of the water-body. Snail generation times will decrease in most areas, meaning that snail populations will recover faster from natural population reductions and from snail-control efforts. We suggest a link between the ecological properties of transmission sites and infection risk which could significantly affect the outcomes of interventions designed to alter water contact behaviour – proposing that such interventions are more likely to reduce infection levels at river locations than lakes, where infection risk remains high for longer. In cooler areas where snails are currently found, increasing temperatures may significantly increase infection risk, potentially leading to new, high-intensity foci of infection.
Goodman’s New Riddle of Induction  [PDF]
Dean Lubin
Open Journal of Philosophy (OJPP) , 2012, DOI: 10.4236/ojpp.2012.21009
Abstract: In this paper, I consider Goodman’s new riddle of induction and how we should best respond to it. Noticing that all the emeralds so far observed are green, we infer (project) that all emeralds are green. However, all emeralds so far observed are also grue, so we could also infer that they are grue. Only one of these inductive inferences or projections could, however, be valid. For the hypothesis that all emeralds are green predicts that the next observed emerald will be green; whereas the hypothesis that they are grue predicts that it will blue. Goodman’s new riddle is the problem of saying why the inductive inference involving “green” is the valid one. Goodman’s own solution appeals to the idea of entrenchment. His idea is that “green” is a more entrenched predicate than “grue” in the sense that it has figured many more times in our past projections than has “grue”. In his view, this explains why “green” is projectible (can be used in valid inductive inferences) whereas “grue” isn’t. I argue that this response doesn’t go far enough and that we additionally need an explanation of why “green” is more entrenched than “grue”—that we are otherwise left with the unsatisfactory view that its superior entrenchment is a mere linguistic accident. I try to supplement Goodman’s solution with an explanation of this kind. I argue that “grue” is not entrenched be- cause past successful inductions involving “green” show that past projections that could have been made using what I call “grue-like” predicates—predicates which are like “grue” except that the times featuring in their definitions are past—would have been unsuccessful.
Modeling Population Growth: Exponential and Hyperbolic Modeling  [PDF]
Dean Hathout
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.42045
Abstract:

A standard part of the calculus curriculum is learning exponential growth models. This paper, designed to serve as a teaching aid, extends the standard modeling by showing that simple exponential models, relying on two points to fit parameters do not do a good job in modeling population data of the distant past. Moreover, they provide a constant doubling time. Therefore, the student is introduced to hyperbolic modeling, and it is demonstrated that with only two population data points, an amazing amount of information can be obtained, such as reasonably accurate doubling times that are a function of t, as well as accurate estimates of such entertaining topics as the total number of people that have ever lived on earth.

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