Measuring Social Capital in Hamilton, Ontario
Kitchen, Peter; Williams, Allison; Simone, Dylan
2012-01-01
Social capital has been studied by academics for more than 20 years and within the past decade there has been an explosion of growth in research linking social capital to health. This paper investigates social capital in Hamilton, Ontario by way of a telephone survey of 1,002 households in three neighbourhood groups representing high, mixed and…
Measuring Social Capital in Hamilton, Ontario
Kitchen, Peter; Williams, Allison; Simone, Dylan
2012-01-01
Social capital has been studied by academics for more than 20 years and within the past decade there has been an explosion of growth in research linking social capital to health. This paper investigates social capital in Hamilton, Ontario by way of a telephone survey of 1,002 households in three neighbourhood groups representing high, mixed and…
Hamilton Place - Ontario Canadá
Garwood-Jones, T. P.
1975-04-01
Full Text Available Although comparatively modest as to its exterior, the interior of the theatre-auditorium Hamilton Place has been most successfully solved, both as regards design and acoustics. Construction techniques and elements have been utilized to achieve two different sections in one and the same hall with on one hand the capacity to be able to capture shades of the spoken word at theatrical functions and on the other to reproduce the sharpness and variety of orchestras and choirs. The following elements deserve special mention: the mobile wall which incorporates the orchestra into the hall by closing the proscenium arch; the two elevating platforms where the orchestra is placed; the vertical velvet surfaces, hung like banners which soften the repercussion of the sound; the mobile horizontal surfaces over the orchestra that direct and orient the sound. The most interesting construction techniques are: the subdivision of the building into different parts, each one with independent foundation so as to avoid the transmission of the sound from one section to the other; the texture of the brick walls that disperse the reflected sound; and the use of counterforts to create smaller more personal sections for varied use. The acoustic characteristics are improved by means of a sound installation, formed by small loudspeakers placed under each seat and by other bigger ones distributed in the walls that surround the hall. The building is completed by various service installations that are appropriate to this type of construction, as well as by a small theatre-studio for the rehearsals of the orchestra and the actors, while other functions are going on in the main hall.El teatro-auditorio Hamilton Place, aunque relativamente modesto por fuera, tiene soluciones muy afortunadas en el interior, tanto por su diseño como por su adecuación acústica. Se han utilizado elementos y técnicas constructivas destinadas a conseguir, en una única sala, dos espacios
Sense of Belonging and Mental Health in Hamilton, Ontario: An Intra-Urban Analysis
Kitchen, Peter; Williams, Allison; Chowhan, James
2012-01-01
This paper examines geographic variations in sense of community belonging in Hamilton, Ontario. It also identifies the most significant health and social factors associated with belonging in the city. The research employs data from the 2007/08 Canadian Community Health Survey for respondents aged 18 or over living in the Hamilton Census…
Respiratory Medicine at McMaster University, Hamilton, Ontario: 1968 To 2013
Jones, Norman L.; Paul M O’Byrne
2014-01-01
The medical school at McMaster University (Hamilton, Ontario) was conceived in 1965 and admitted the first class in 1969. John Evans became the founding Dean and he invited Moran Campbell to be the first Chairman of the Department of Medicine. Moran Campbell, already a world figure in respiratory medicine and physiology, arrived at McMaster in September 1968, and he invited Norman Jones to be Coordinator of the Respiratory Programme.At that time, Hamilton had a population of 300,000, with two...
Sense of Place and Health in Hamilton, Ontario: A Case Study.
Williams, Allison; Kitchen, Peter
2012-09-01
The concept of sense of place has received considerable attention by social scientists in recent years. Research has indicated that a person's sense of place is influenced by a number of factors including the built environment, socio-economic status (SES), well-being and health. Relatively few studies have examined sense of place at the neighbourhood level, particularly among communities exhibiting different levels of SES. This article investigates sense of place among three neighbourhood groups in Hamilton, Ontario representing areas of low, mixed and high SES. It analyses data from a 16-point sense of place scale derived from the Hamilton Household Quality of Life Survey carried out in 2010-2011 among 1,002 respondents. The paper found that sense of place was highest among residents of the high SES neighbourhood group as well as among home owners, people residing in single-detached homes, retired residents and those living in their neighbourhood for more than 10 years. From a health perspective, the paper found that a strong association existed between sense of place and self-perceived mental health across the three neighbourhood groups. Furthermore, by way of regression modeling, the paper examined the factors influencing health-related sense of place. Among the sample of respondents, a strong connection was found between housing, particularly home ownership, and high levels of health-related sense of place.
Social determinants of older adults' awareness of community support services in Hamilton, Ontario.
Tindale, J; Denton, M; Ploeg, J; Lillie, J; Hutchison, B; Brazil, K; Akhtar-Danesh, N; Plenderleith, J
2011-11-01
Community support services (CSSs) have been developed in Canada and other Western nations to enable persons coping with health or social issues to continue to live in the community. This study addresses the extent to which awareness of CSSs is structured by the social determinants of health. In a telephone interview conducted in February-March 2006, 1152 community-dwelling older adults (response rate 12.4%) from Hamilton, Ontario, Canada were made to read a series of four vignettes and were asked whether they were able to identify a CSS they may turn to in that situation. Across the four vignettes, 40% of participants did name a CSS as a possible source of assistance. Logistic regression was used to determine factors related to awareness of CSSs. Respondents most likely to have awareness of CSS include the middle-aged and higher-income groups. Being knowledgeable about where to look for information about CSSs, having social support and being a member of a club or voluntary organisations are also significant predictors of awareness of CSSs. Study results suggest that efforts be made to improve the level of awareness and access to CSSs among older adults by targeting their social networks as well as their health and social care providers.
Respiratory medicine at McMaster University, Hamilton, Ontario: 1968 to 2013
Jones, Norman L; O’Byrne, Paul M
2014-01-01
The medical school at McMaster University (Hamilton, Ontario) was conceived in 1965 and admitted the first class in 1969. John Evans became the founding Dean and he invited Moran Campbell to be the first Chairman of the Department of Medicine. Moran Campbell, already a world figure in respiratory medicine and physiology, arrived at McMaster in September 1968, and he invited Norman Jones to be Coordinator of the Respiratory Programme. At that time, Hamilton had a population of 300,000, with two full-time respirologists, Robert Cornett at the Hamilton General Hospital and Michael Newhouse at St Joseph’s Hospital. From the clinical perspective, the aim of the Respiratory Programme was to develop a network approach to clinical problems among the five hospitals in the Hamilton region, with St Joseph’s Hospital serving as a regional referral centre, and each hospital developing its own focus: intensive care and burns units at the Hamilton General Hospital; cancer at the Henderson (later Juravinski) Hospital; tuberculosis and rehabilitation at the Chedoke Hospital; pediatrics and neonatal intensive care at the McMaster University Medical Centre; and community care at the Joseph Brant Hospital in Burlington (Ontario). The network provided an ideal base for a specialty residency program. There was also the need to establish viable research. These objectives were achieved through collaboration, support of hospital administration, and recruitment of clinicians and faculty, mainly from our own trainees and research fellows. By the mid-1970s the respiratory group numbered more than 25; outpatient clinic visits and research had grown beyond our initial expectations. The international impact of the group became reflected in the clinical and basic research endeavours. ASTHMA: Freddy Hargreave and Jerry Dolovich established methods to measure airway responsiveness to histamine and methacholine. Allergen inhalation was shown to increase airway responsiveness for several weeks
MacDonald, B.L., E-mail: macdonbl@mcmaster.ca [McMaster Univ., Dept. of Medical Physics and Applied Radiation Sciences, Hamilton, Ontario (Canada); Vanderstelt, J., E-mail: joshv@nray.ca [Nray Services Inc., Dundas, Ontario (Canada)
2015-03-15
Non-destructive analytical techniques are becoming increasingly important for the study of objects of cultural heritage interest. We present a study that applied two techniques: x-ray fluorescence (XRF) and neutron radiography, for the investigation of a time capsule recovered from an urban construction site in Gore Park, Hamilton. XRF analysis revealed the composition of the artifact, while n-radiography showed that its contents remained intact after being interred for 91 years. Results of this study demonstrate the value of non-destructive techniques for the analysis and preservation of cultural heritage. (author)
2014-01-01
Past research in Hamilton, Ontario has found that age and longevity of residence are positively associated with evaluations of sense of place (SoP); further, evaluations of SoP between immigrants and Canadian-born individuals have shown no clear pattern (Williams et al. 2010; Williams and Kitchen 2012). This paper builds on this work by further examining evaluations of SoP among both immigrants and Canadian-born residents and across gender in Hamilton, while expanding the study to two other s...
Csiszar, Susan A; Gandhi, Nilima; Alexy, Radka; Benny, Donald T; Struger, John; Marvin, Chris; Diamond, Miriam L
2011-07-01
A model formulation based on "aquivalence", as defined in terms of activity is presented to estimate the multimedia fate of ionizing chemicals. The aquivalence approach is analogous to fugacity but aquivalence is applicable to neutral and ionizing compounds, and has been applied previously to speciating chemicals, notably metals. The new aquivalence-based mass-balance model treats ionizing organic compounds that exist as interconverting neutral and ionic species which are subject to fate processes at differing rates. The model is illustrated by application to four ionizing pharmaceuticals in Hamilton Harbour, Lake Ontario. At the system pH of 7.9-8.5, ibuprofen, gemfibrozil, and naproxen are expected to be almost entirely ionic and triclosan split between ionic and neutral forms. Measured seasonal surface water concentrations, which were 2-10 times lower in the late summer and fall than during spring, were used to solve for unknown values of chemical half-life in the water column due to degradation (photo- and bio-) of the ionizing and neutral forms and secondarily, ionic sorption coefficients of the ionizing forms. Model estimates of half-lives in the habour's water ranged from 11 to 77, 11 to 147 and 10 to 37 for ionic ibuprofen, gemfibrozil, and naproxen, respectively; and 4-22 days and 2-9 days for ionic and neutral triclosan, respectively, with the shortest half-lives in spring and the longest in summer.
Gallina, Melissa; Williams, Allison
Past research in Hamilton, Ontario has found that age and longevity of residence are positively associated with evaluations of sense of place (SoP); further, evaluations of SoP between immigrants and Canadian-born individuals have shown no clear pattern (Williams et al. 2010; Williams and Kitchen 2012). This paper builds on this work by further examining evaluations of SoP among both immigrants and Canadian-born residents and across gender in Hamilton, while expanding the study to two other small-to-medium sized cities: Saskatoon, Saskatchewan and, Charlottetown, Prince Edward Island. This paper has two objectives: (1) to establish measures of SoP across immigrant status and gender in Hamilton, Saskatoon, and Charlottetown; and, (2) to determine how SoP varies according to immigrant status, length of residence in Canada, age, income, and neighbourhood length of residence across the three city sites. Telephone survey data (n = 1,132) was used to compare evaluations of SoP across various groups and to construct an ordered logistic regression model for SoP. Results suggest that immigrants tended to rate their SoP lower than their Canadian-born counterparts. Hamilton residents were found to rate their SoP lowest, followed by Saskatoon residents and, finally, Charlottetown residents. Younger individuals, those with lower income levels, and those with shorter neighbourhood residency in the cities concerned were more likely to have lower evaluations of SoP. This research suggests that greater attention is needed to nurture immigrants' connection with their new home.
The face of energy poverty in Hamilton
Cooper, T. [McQuesten Legal and Community Services, Hamilton, ON (Canada)
2007-07-01
In 1907, Hamilton, Ontario was known as the electric city, where jobs were plentiful and where the cheapest hydro power in the world was produced. This presentation stated that currently, Hamilton which faces one of the highest poverty rates in the province of Ontario, with 96,000 residents living below the low income cutoff. Heat and hydro costs have escalated and have driven more Hamiltonians into deep poverty. Several quotes from residents were presented along with photographs to illustrate the situation. A graph depicting poverty by age demographics was also provided. The presentation emphasized that there is a need for a housing emergency loan program and a utility arrears program for the City of Hamilton, as many tenants are struggling to survive without heat, gas or electricity. The presentation concluded that Hamilton is in need of an effective heat strategy during the summer cooling months because senior citizens, persons with disabilities and families living in low-income, poorly ventilated housing are particularly at risk during an extreme heat event. refs., tabs., figs.
Clean air Hamilton 2001 progress report
NONE
2002-05-01
This community initiative called Clean Air Hamilton was established to improve air quality in Hamilton, Ontario. It has been mandated to annually report on progress and provide advice with regard to current air quality issues. The quality of life of residents is improved as a result of the work performed by Clean Air Hamilton, and it also enhances Hamilton's image. Numerous inquiries have been received from City officials in several municipalities such as Toronto, Kitchener-Waterloo and Windsor as a testament to the success of the initiative. Financial support is received from all levels of government. The funding received from the Council has helped in attracting additional donations in support of this initiative. Clean Air Hamilton was involved in one capacity or another in research, emissions reduction projects and public awareness campaigns during 2001, and its contributions were valued at approximately 500,000 dollars. The City of Hamilton was awarded the United Nations for Human Settlements award as a result of Clean Air Hamilton's community process in local air quality improvement. In addition, the City received the Dubai International Award for Best Practices in Improving the Living Environment. Clean Air Hamilton is ready to move to the next phase, which requires moving current structures that supplements voluntary commitments with committed funding from key stakeholders. Since June 1996, the advisory level of 32 on the Air Pollution Index has not been reached, and rarely goes over 20. Throughout the 1990s, levels of toxics have decreased significantly. A three-year self-sustaining program should be developed and funding sought for those initiatives, discussions should be facilitated among industrial stakeholders when they address air quality issues, and research should continue to be supported and advice on current air quality issues be provided to City Council. 1 fig.
Elizabeth Hamilton: Enlightenment Educator.
Russell, Rosalind
1986-01-01
Elizabeth Hamilton, an eighteenth- and early nineteenth-century Scottish writer on education, was one of the first to advocate the application of educational psychology to teaching. She introduced Pestalozzi's method to the English-reading public and argued for equal education for all children of both sexes and all social backgrounds. (LFL)
Employer-Supported Child Care in Ontario.
Ontario Ministry of Community and Social Services, Toronto.
Six case studies describing current employer-supported child care services in Ontario are presented. The studies describe the PLADEC Day Care Center of the Kingston Psychiatric Hospital, the day care center at the Chedoke-McMaster Hospitals in Hamilton, the Early Learning Centre at Durham College in Oshawa, the Hydrokids day care center at the…
Sánchez Santos, José Manuel (1967-)
2012-01-01
A materia Mecánica Clásica II forma parte do bloque que no Grao en Física se dedica á Mecánica Clásica, que é a parte da Física que estuda o movemento das partículas e os corpos materiais e que comprende a teoría iniciada por Galileo e Newton e desenvolvida nos séculos XVIII e XIX por Lagrange e Hamilton, incluíndo tamén a Relatividade Especial de Einstein. A materia divídese en catro bloques temáticos de similar peso e duración temporal. O primeiro deles ten un marcado carácter teóric...
Mobile Air Monitoring: Measuring Change in Air Quality in the City of Hamilton, 2005-2010
Adams, Matthew D.; DeLuca, Patrick F.; Corr, Denis; Kanaroglou, Pavlos S.
2012-01-01
This paper examines the change in air pollutant concentrations between 2005 and 2010 occurring in the City of Hamilton, Ontario, Canada. After analysis of stationary air pollutant concentration data, we analyze mobile air pollutant concentration data. Air pollutants included in the analysis are CO, PM[subscript 2.5], SO[subscript 2], NO,…
Perceptions of Quality Life in Hamilton's Neighbourhood Hubs: A Qualitative Analysis
Eby, Jeanette; Kitchen, Peter; Williams, Allison
2012-01-01
This paper examines perceptions of quality of life in Hamilton, Ontario, Canada from the perspective of residents and key community stakeholders. A series of eight focus groups were conducted. Six sessions were held with residents of neighbourhood "hubs", areas characterized by high levels of poverty. The following themes were highlighted as…
Perceptions of Quality Life in Hamilton's Neighbourhood Hubs: A Qualitative Analysis
Eby, Jeanette; Kitchen, Peter; Williams, Allison
2012-01-01
This paper examines perceptions of quality of life in Hamilton, Ontario, Canada from the perspective of residents and key community stakeholders. A series of eight focus groups were conducted. Six sessions were held with residents of neighbourhood "hubs", areas characterized by high levels of poverty. The following themes were…
Code Red: Explaining Average Age of Death in the City of Hamilton
Patrick F. DeLuca
2015-11-01
Full Text Available The aim of this study is to identify the underlying factors that explain the average age of death in the City of Hamilton, Ontario, Canada, as identified in the Code Red Series of articles that were published in the city's local newspaper in 2010. Using a combination of data from the Canadian Census, the Government of Ontario and the Canadian Institute for Health Information, factor analysis was performed yielding three factors relating to poverty, working class, and health and aging. In a regression analysis these factors account for 42% of the total variability in the average ages of death observed at the census tract level of geography within the city.
New facility in Hamilton to generate electricity from biosolids
Nolan, W. [Liberty Energy, Hamilton, ON (Canada); Thomson, M.; Ahluwalia, J. [Environ EC Canada, Mississauga, ON (Canada)
2009-07-15
Ontario's Green Energy Act was introduced in 2009 to facilitate progress toward greenhouse gas (GHG) reduction and to increase the amount of energy produced from renewable energy sources. This article described a technology that can be used to generate electricity from the biosolids that are generated at wastewater treatment plants and pulp and paper mills across Ontario. Liberty Energy Inc. is proposing to build a new renewable energy thermal electric power plant in Hamilton, Ontario. The facility will use waste biomass as fuel consisting of biosolids, or sewage sludge. These materials have traditionally been managed through land filling, land application, or incineration. The use of waste biomass for power generation will provide a long term, sustainable and environmentally friendly method to manage these waste materials. This article reviewed some of the thermal treatment technologies, including fixed hearth, multiple hearth, rotary kilns and fluidized bed reactors. The odour management plan for the facility includes sealed storage of biosolids and indoor receiving of both biosolids and biomass, with all venting to either the gasifier or a biofilter. The exhaust from the gasifier will be treated by selective catalytic and non-catalytic reduction technology, lime slurry wet scrubbers, fabric filters and powdered activated carbon scrubbers. 2 figs.
Determinant Sums for Undirected Hamiltonicity
Björklund, Andreas
2010-01-01
We present a Monte Carlo algorithm for Hamiltonicity detection in an $n$-vertex undirected graph running in $O^*(1.657^{n})$ time. To the best of our knowledge, this is the first superpolynomial improvement on the worst case runtime for the problem since the $O^*(2^n)$ bound established for TSP almost fifty years ago (Bellman 1962, Held and Karp 1962). It answers in part the first open problem in Woeginger's 2003 survey on exact algorithms for NP-hard problems. For bipartite graphs, we improve the bound to $O^*(1.414^{n})$ time. Both the bipartite and the general algorithm can be implemented to use space polynomial in $n$. We combine several recently resurrected ideas to get the results. Our main technical contribution is a new reduction inspired by the algebraic sieving method for $k$-Path (Koutis ICALP 2008, Williams IPL 2009). We introduce the Labeled Cycle Cover Sum in which we are set to count weighted arc labeled cycle covers over a finite field of characteristic two. We reduce Hamiltonicity to Labeled ...
High-Order Hamilton's Principle and the Hamilton's Principle of High-Order Lagrangian Function
ZHANG Ming-Jiang; ZHAO Hong-Xia; FANG Jian-Hui; MA Shan-Jun; LU Kai
2008-01-01
In this paper, based on the theorem of the high-order velocity energy, integration and variation principle, the high-order Hamilton's principle of general holonomic systems is given. Then, three-order Lagrangian equations and four-order Lagrangian equations are obtained from the high-order Hamilton's principle. Finally, the Hamilton's principle of high-order Lagrangian function is given.
2013-05-23
..., CT 06096-1010; or Hamilton Standard Division, One Hamilton Road, United Technologies Corporation, Mail Stop 1A-3-C63, Windsor Locks, CT 06096-1010; phone: 877-808-7575; fax: 860-660-0372; email: tech... corrosion to accumulate to critical limits. Hamilton Sundstrand developed, and we approved,...
Strebel differentials and Hamilton sequences
LI; Zhong(
2001-01-01
［1］Strebel, K., Point shift differentials and extremal quasiconformal mappings, Annale Acad. Scle. Fenn. Math., 1998, 23: 475 -494.［2］Gardiner, F. P., Approximation of infinite dimensional Teichmutller space, Trans. Amer. Soc., 1999, 282: 367-383.［3］Lakic, N. , The Strebel points, Comptemp. Math. , 1997, 211: 417-431.［4］Wu Sheng jian, Hamilton sequences for extremal quasiconformal mappings of the unit disc, Science in China, Ser. A, 1999,42(10): 1033-1042.［5］Li Zhong, Qi Yi, A note on point shift differentials, Science in China, Ser. A, 1999, 42(5): 449-455.［6］Hamilton, R. S., Extremal quasiconformal mappings with prescribed boundary values, Trans. Amer. Math. Soc. , 1969,138: 399-406.［7］Krushkal, S. , Extremal quasiconformal mappings, Sirbirsk. Mat. Zh., 1969, 10: 573-583.［8］Reich, E., Strebel, K., Extremal quasiconformal mappings with given boundary values, Contributions to Analysis, New York: Academic Press, 1974, 375-391.［9］Strebel, K. , On quasiconformal mappings of open Riemann surfaces, Commemt. Math. Helr., 1978, 53: 301-321.［10］Earle, C., Li Zhong, Extremal quasiconformal mappings in plane domains, Quasiconformal Mappings and Analysis A Col-lection of Papers Honoring F. W. Gehring, New York: Springer-Verlag, 1998, 141-158.［11］Strebel, K., On quadratic differentials and extremal quasiconforrnal mappings, in Proc. of the Intern. Congress of Math.,Vancouver, 1974.［12］Li Zhong, Some new results on the geometry of infinite dimensional Teichmuller space, in Proceedings of the 3rd International Colloquium on Finite or Infinite Dimensional Complex Analysis, 1995, 369-378.
An extended Hamilton — Jacobi method
Kozlov, Valery V.
2012-11-01
We develop a new method for solving Hamilton's canonical differential equations. The method is based on the search for invariant vortex manifolds of special type. In the case of Lagrangian (potential) manifolds, we arrive at the classical Hamilton — Jacobi method.
Hamilton optics: transformational theory of optics
Winston, Roland; Ge, Wenjun
2013-09-01
In 1824 William Rowan Hamilton presented a memoir to the Royal Irish Academy on Optics(Trans. R. Irish. Acacamy, XV, 1828), which was the foundation for transformational optics, classical mechanics, nonimaging optics and thermodynamical foundation of nonimaging optics,etc. It is useful for us even in 2013 to revisit the Hamilton resolution.
Digitization of the Mary Hamilton Papers
Gardner Anne-Christine
2017-03-01
Full Text Available Held at The John Rylands Library, Manchester, the Mary Hamilton Papers are a valuable, but still largely untapped resource for linguistic, cultural and literary studies focussing on the late eighteenth century. In her diaries Lady Mary Hamilton (1756-1816 documents daily life and friendships with intellectual figures of the time, for instance Horace Walpole and members of the Bluestocking circle, which included Elizabeth Montagu and Frances Burney. The archive also contains letters written to Lady Mary Hamilton by her family and other members of her social network.
Angel, V.; Garvey, A.; Sydor, M.
2017-08-01
In the face of changing economies and patterns of development, the definition of heritage is diversifying, and the role of inventories in local heritage planning is coming to the fore. The Durand neighbourhood is a layered and complex area located in inner-city Hamilton, Ontario, Canada, and the second subject area in a set of pilot inventory studies to develop a new city-wide inventory strategy for the City of Hamilton,. This paper presents an innovative digital workflow developed to undertake the Durand Built Heritage Inventory project. An online database was developed to be at the centre of all processes, including digital documentation, record management, analysis and variable outputs. Digital tools were employed for survey work in the field and analytical work in the office, resulting in a GIS-based dataset that can be integrated into Hamilton's larger municipal planning system. Together with digital mapping and digitized historical resources, the Durand database has been leveraged to produce both digital and static outputs to shape recommendations for the protection of Hamilton's heritage resources.
Air Quality in the Central Ontario Region
Gbor, P. K.; Meng, F.; Singh, R.; Galvez, O.; Sloan, J. J.
2004-12-01
The Central Ontario Region (COR) is the most densely populated area in Canada. With a population of 7.3 million, it contains 23% of the total population of Canada. It extends from the extreme south west end of Ontario to the eastern end of the Greater Toronto Area (GTA) and includes the Niagara, Hamilton and Waterloo Regions,. The air quality of this region is frequently severely impaired in the summer months. In the larger metropolitan areas (Toronto and Hamilton) air pollution is a concern throughout the year. Local health authorities attribute about 1000 premature deaths per year in the GTA alone to air pollution. Average air pollution levels in Ontario have decreased significantly during the past 30 years, despite significant growth in both population and industry. The concentrations of SO2 and CO have decreased by over 80% and the concentration of NOX has decreased by about 50% over the past 26 years. Currently, the concentrations of NOX, CO, SO2 and VOCs in the COR are well below the Provincial and Federal air quality criteria. Ozone, PM2.5 and PM10, however, remain above the Provincial guidelines, so smog still remains a problem. The pollutants in the atmosphere of the COR are caused by both local emissions and long range transport. The COR contributes over 50% of the NOx, VOC and CO emissions in Ontario. Over 58% of NOX and CO emissions in the COR are due to mobile sources while about 50% of VOC and PM emissions are due to area sources. The proximity of the COR to the Canada-U.S. border makes it vulnerable to long range transport of pollutants stemming from the much larger population in the United States. The Canadian government, industries and non-governmental organizations are all taking steps to help reduce the level of pollution in Canada. The Canadian federal government also participates in extensive consultations and cooperative programs with the United States designed to reduce the mutually detrimental effects of cross-border pollution. These
Traffic pollution and health : international and Ontario experiences
Finkelstein, M.M. [McMaster Univ., Hamilton, ON (Canada). McMaster Inst. of Environment and Health]|[McMaster Univ., Hamilton, ON (Canada). Dept. of Family Medecine]|[Toronto Univ., ON (Canada). Dept. of Family Medecine]|[Toronto Univ., (Canada). Dept. of Public Health Sciences
2006-07-01
International and Ontario experience related to traffic pollution and health were discussed. The presentation opened with a table about deaths per day resulting from sulphur dioxide and smoke micrograms per cubic metre. It discussed the constituents of air pollution focusing on gas and particulates as well as atmospheric chemistry and indoor air pollution sources. Outdoor sources of air pollutants include naturally occurring pollutants such as volcanic eruptions, dust storms, vegetation emissions, and fires as well as human generated sources such as stationary and mobile sources and diesel engine pollution. Each type of pollutant was discussed in detail. Air pollution and human health was then presented in the context of traffic pollution and children, major epidemiologic studies of the health effects of pollutants, pollution and mortality in Vancouver, as well as other studies of a similar nature. The Hamilton/Toronto cohort study was one study that was highlighted in particular. The study concluded that living close to traffic in Hamilton and Toronto is associated with increased risk of circulatory disease hospital admissions and mortality. The presentation concluded with a discussion of air pollution and health in Ontario and recommendations made by the Ontario Medical Association. tabs., figs.
National Oceanic and Atmospheric Administration, Department of Commerce — Bathymetry of Lake Ontario has been compiled as a component of a NOAA project to rescue Great Lakes lake floor geological and geophysical data and make it more...
Hamilton's indicators of the force of selection
Baudisch, Annette
2005-01-01
To quantify the force of selection, Hamilton [Hamilton, W. D. (1966) J. Theor. Biol. 12, 12-45] derived expressions for the change in fitness with respect to age-specific mutations. Hamilton's indicators are decreasing functions of age. He concluded that senescence is inevitable: survival...... and fertility decline with age. I show that alternative parameterizations of mutational effects lead to indicators that can increase with age. I then consider the case of deleterious mutations with age-specific effects. In this case, it is the balance between mutation and selection pressure that determines...... the equilibrium number of mutations in a population. In this balance, the effects of different parameterizations cancel out, but only to a linear approximation. I show that mutation accumulation has little impact at ages when this linear approximation holds. When mutation accumulation matters, nonlinear effects...
Richard Hamilton: the Very Great Semiographer
Paul, Frédéric
2012-01-01
For fifty years and more, Richard Hamilton has been an enthralling artist. He was not only a Pop Art pioneer, but also one of its earliest theoreticians… before the United States pilfered the idea and turned it into a lucrative trademark—their industrial model inspiring the movement, but the formulae of Cubism and Surrealism, with the re-use of found objects by collage and assemblage, also playing their part. Hamilton is little known outside the United Kingdom, and has been signally overlooke...
Conformal invariance conserved quantity of Hamilton systems
Cai Jian-Le; Luo Shao-Kai; Mei Feng-Xiang
2008-01-01
This paper studies conformal invariance and comserved quantRies of Hamilton system.The definition and the determining equation of conformal invariance for Hamilton system are provided.The relationship between the conformal invariance and the Lie symmetry are discussed,and the necessary and sufficient condition that the conformal invariance would be the Lie symmetry of the system under the infinitesimal one-parameter transformation group is deduced.It gives the conserved quantities of the system and an example for illustration.
Hamilton County: A Rural School District Profile.
Harned, Catherine
Using state education agency, census, industry employment and occupational information data, this paper provides a detailed picture of a rural school district in Southern Illinois. Mining and agriculture are the major industries in Hamilton County. The major mining employer closed in February 1988, and the drought of 1988 is likely to adversely…
Hamilton-Jacobi renormalization for Lifshitz spacetime
Baggio, M.; de Boer, J.; Holsheimer, K.
2012-01-01
Just like AdS spacetimes, Lifshitz spacetimes require counterterms in order to make the on-shell value of the bulk action finite. We study these counterterms using the Hamilton-Jacobi method. Rather than imposing boundary conditions from the start, we will derive suitable boundary conditions by
An unusual ophthalmic finding in Lane-Hamilton syndrome.
Villegas, Victor M; Rachitskaya, Aleksandra V; Lam, Byron L; McKeown, Craig A; Berrocal, Audina M
2014-12-01
Lane-Hamilton syndrome is a rare condition that is characterized by idiopathic pulmonary hemosiderosis and celiac disease. We report the case of an 18-month-old girl with Lane-Hamilton syndrome who had unilateral pigmentary retinopathy.
Conformal invariance and Hamilton Jacobi theory for dissipative systems
Kiehn, R. M.
1975-01-01
For certain dissipative systems, a comparison can be made between the Hamilton-Jacobi theory and the conformal invariance of action theory. The two concepts are not identical, but the conformal action theory covers the Hamilton-Jacobi theory.
VIABILITY SOLUTIONS TO STRUCTURED HAMILTON-JACOBI EQUATIONS UNDER CONSTRAINTS
2011-01-01
International audience; Structured Hamilton-Jacobi partial differential equations are Hamilton-Jacobi equations where the time variable is replaced by a vector-valued variable "structuring" the system. It could be the time-age pair (Hamilton-Jacobi-McKendrick equations) or candidates for initial or terminal conditions (Hamilton-Jacobi-Cournot equations) among a manifold of examples. Here, we define the concept of "viability solution" which always exists and can be computed by viability algori...
Hamilton Jacobi method for solving ordinary differential equations
Mei, Feng-Xiang; Wu, Hui-Bin; Zhang, Yong-Fa
2006-08-01
The Hamilton-Jacobi method for solving ordinary differential equations is presented in this paper. A system of ordinary differential equations of first order or second order can be expressed as a Hamilton system under certain conditions. Then the Hamilton-Jacobi method is used in the integration of the Hamilton system and the solution of the original ordinary differential equations can be found. Finally, an example is given to illustrate the application of the result.
Three-order pseudo-Hamilton canonical equations
Ma Shan-Jun; Huang Pei-Tian; Yan Rong; Zhao Hong-Xia
2006-01-01
Based on the three-order Lagrangian equations, Hamilton's function ofacceleration H* and generalized acceleration momentum P*α are defined, and pseudo-Hamilton canonical equations corresponding to three-order Lagrangian equations are obtained. The equations are similar to Hamilton's canonical equations of analytical mechanics in form.
Hamilton--Jacobi meet M\\"obius
Faraggi, Alon E
2015-01-01
Adaptation of the Hamilton--Jacobi formalism to quantum mechanics leads to a cocycle condition, which is invariant under $D$--dimensional M\\"obius transformations with Euclidean or Minkowski metrics. In this paper we aim to provide a pedagogical presentation of the proof of the M\\"obius symmetry underlying the cocycle condition. The M\\"obius symmetry implies energy quantization and undefinability of quantum trajectories, without assigning any prior interpretation to the wave function. As such, the Hamilton--Jacobi formalism, augmented with the global M\\"obius symmetry, provides an alternative starting point, to the axiomatic probability interpretation of the wave function, for the formulation of quantum mechanics and the quantum spacetime. The M\\"obius symmetry can only be implemented consistently if spatial space is compact, and correspondingly if there exist a finite ultraviolet length scale. Evidence for non--trivial space topology may exist in the cosmic microwave background radiation.
Ontario's Student Voice Initiative
Courtney, Jean
2014-01-01
This article describes in some detail aspects of the Student Voice initiative funded and championed by Ontario's Ministry of Education since 2008. The project enables thousands of students to make their voices heard in meaningful ways and to participate in student-led research. Some students from grades 7 to 12 become members of the Student…
Lake Ontario: Nearshore Variability
We conducted a high-resolution survey with towed electronic instrumentation along the Lake Ontario nearshore (720 km) at a 20 meter contour. The survey was conducted September 6-10, 2008 with a shorter 300 km survey conducted August 14-15 for comparing of temporal variability. ...
Quantum Potential Via General Hamilton - Jacobi Equation
Mollai, Maedeh; Jami, Safa; Ahanj, Ali
2011-01-01
In this paper, we sketch and emphasize the automatic emergence of a quantum potential (QP) in general Hamilton-Jacobi equation via commuting relations, quantum canonical transformations and without the straight effect of wave function. The interpretation of QP in terms of independent entity is discussed along with the introduction of quantum kinetic energy. The method has been extended to relativistic regime, and same results have been concluded.
Covariant Hamilton equations for field theory
Giachetta, Giovanni [Department of Mathematics and Physics, University of Camerino, Camerino (Italy); Mangiarotti, Luigi [Department of Mathematics and Physics, University of Camerino, Camerino (Italy)]. E-mail: mangiaro@camserv.unicam.it; Sardanashvily, Gennadi [Department of Theoretical Physics, Physics Faculty, Moscow State University, Moscow (Russian Federation)]. E-mail: sard@grav.phys.msu.su
1999-09-24
We study the relations between the equations of first-order Lagrangian field theory on fibre bundles and the covariant Hamilton equations on the finite-dimensional polysymplectic phase space of covariant Hamiltonian field theory. If a Lagrangian is hyperregular, these equations are equivalent. A degenerate Lagrangian requires a set of associated Hamiltonian forms in order to exhaust all solutions of the Euler-Lagrange equations. The case of quadratic degenerate Lagrangians is studied in detail. (author)
Canonical equations of Hamilton with beautiful symmetry
Liang, Guo; Guo, Qi
2012-01-01
The Hamiltonian formulation plays the essential role in constructing the framework of modern physics. In this paper, a new form of canonical equations of Hamilton with the complete symmetry is obtained, which are valid not only for the first-order differential system, but also for the second-order differential system. The conventional form of the canonical equations without the symmetry [Goldstein et al., Classical Mechanics, 3rd ed, Addison-Wesley, 2001] are only for the second-order differe...
Fifty years with the Hamilton scales for anxiety and depression. A tribute to Max Hamilton
Bech, P
2009-01-01
From the moment Max Hamilton started his psychiatric education, he considered psychometrics to be a scientific discipline on a par with biochemistry or pharmacology in clinical research. His clinimetric skills were in operation in the 1950s when randomised clinical trials were established...... as the method for the evaluation of the clinical effects of psychotropic drugs. Inspired by Eysenck, Hamilton took the long route around factor analysis in order to qualify his scales for anxiety (HAM-A) and depression (HAM-D) as scientific tools. From the moment when, 50 years ago, Hamilton published his first...... placebo-controlled trial with an experimental anti-anxiety drug, he realized the dialectic problem in using the total score on HAM-A as a sufficient statistic for the measurement of outcome. This dialectic problem has been investigated for more than 50 years with different types of factor analyses without...
Barriers to Walking: An Investigation of Adults in Hamilton (Ontario, Canada)
Clark, Andrew F; Scott, Darren M
2016-01-01
.... Females, senior citizens, and those with a higher body mass index identify the most barriers to walking, while young adults, parents, driver's license owners, and bus pass owners identify the fewest barriers...
URBAN: Development of a Citizen Science Biomonitoring Program Based in Hamilton, Ontario, Canada
Cartwright, Lyndsay A.; Cvetkovic, Maja; Graham, Spencer; Tozer, Douglas; Chow-Fraser, Patricia
2015-01-01
Due to increasing urbanization, wetlands and streams within city limits are being altered, filled in, and degraded. The habitat that remains is critical for providing urban areas with ecosystem services and maintaining biodiversity, yet is often insufficiently monitored by environmental agencies due to a lack of resources. To help fill this void,…
Sense of Place and Health in Hamilton, Ontario: A Case Study
Williams, Allison; Kitchen, Peter
2012-01-01
The concept of sense of place has received considerable attention by social scientists in recent years. Research has indicated that a person's sense of place is influenced by a number of factors including the built environment, socio-economic status (SES), well-being and health. Relatively few studies have examined sense of place at the…
Sense of Place and Health in Hamilton, Ontario: A Case Study
Williams, Allison; Kitchen, Peter
2012-01-01
The concept of sense of place has received considerable attention by social scientists in recent years. Research has indicated that a person’s sense of place is influenced by a number of factors including the built environment, socio-economic status (SES), well-being and health. Relatively few studies have examined sense of place at the neighbourhood level, particularly among communities exhibiting different levels of SES. This article investigates sense of place among three neighbourhood gro...
Hamilton Graph Based on DNA Computing
ZHANGJia-xiu
2004-01-01
DNA computing is a novel method for solving a class of intractable computationalproblems in which the computing can grow exponentially with problem size. Up to now, manyaccomplishments have been achieved to improve its performance and increase its reliability.Hamilton Graph Problem has been solved by means of molecular biology techniques. A smallgraph was encoded in molecules of DNA, and the “operations” of the computation wereperformed with standard protocols and enzymes. This work represents further evidence forthe ability of DNA computing to solve NP-complete search problems.
Algebra and geometry of Hamilton's quaternions
Krishnaswami, Govind S
2016-01-01
Inspired by the relation between the algebra of complex numbers and plane geometry, William Rowan Hamilton sought an algebra of triples for application to three dimensional geometry. Unable to multiply and divide triples, he invented a non-commutative division algebra of quadruples, in what he considered his most significant work, generalizing the real and complex number systems. We give a motivated introduction to quaternions and discuss how they are related to Pauli matrices, rotations in three dimensions, the three sphere, the group SU(2) and the celebrated Hopf fibrations.
Hamilton-Jacobi Method and Gravitation
Di Criscienzo, R; Zerbini, S
2010-01-01
Studying the behaviour of a quantum field in a classical, curved, spacetime is an extraordinary task which nobody is able to take on at present time. Independently by the fact that such problem is not likely to be solved soon, still we possess the instruments to perform exact predictions in special, highly symmetric, conditions. Aim of the present contribution is to show how it is possible to extract quantitative information about a variety of physical phenomena in very general situations by virtue of the so-called Hamilton-Jacobi method. In particular, we shall prove the agreement of such semi-classical method with exact results of quantum field theoretic calculations.
Hamilton-Jacobi Method and Gravitation
di Criscienzo, R.; Vanzo, L.; Zerbini, S.
Studying the behaviour of a quantum field in a classical, curved, spacetime is an extraordinary task which nobody is able to take on at present time. Independently by the fact that such problem is not likely to be solved soon, still we possess the instruments to perform exact predictions in special, highly symmetric, conditions. Aim of the present contribution is to show how it is possible to extract quantitative information about a variety of physical phenomena in very general situations by virtue of the so-called Hamilton-Jacobi method. In particular, we shall prove the agreement of such semi-classical method with exact results of quantum field theoretic calculations.
V. Angel
2017-08-01
Full Text Available In the face of changing economies and patterns of development, the definition of heritage is diversifying, and the role of inventories in local heritage planning is coming to the fore. The Durand neighbourhood is a layered and complex area located in inner-city Hamilton, Ontario, Canada, and the second subject area in a set of pilot inventory studies to develop a new city-wide inventory strategy for the City of Hamilton,. This paper presents an innovative digital workflow developed to undertake the Durand Built Heritage Inventory project. An online database was developed to be at the centre of all processes, including digital documentation, record management, analysis and variable outputs. Digital tools were employed for survey work in the field and analytical work in the office, resulting in a GIS-based dataset that can be integrated into Hamilton’s larger municipal planning system. Together with digital mapping and digitized historical resources, the Durand database has been leveraged to produce both digital and static outputs to shape recommendations for the protection of Hamilton’s heritage resources.
Horizontal drilling in Ontario
Sidey, P.; Precul, L. [Sproule Associates Ltd., Calgary, AB (Canada)
2002-07-01
A review of oil and gas production in Ontario was presented with particular reference to drilling activity between 1987 to mid 2002 when 1450 vertical wells were drilled, of which 1100 were for petroleum production and the remainder were for gas storage, observation wells, private gas wells and stratigraphic tests. Of the 1100 vertical wells drilled for petroleum production, 40 per cent became gas wells, 16 per cent became oil wells, 4 per cent became oil and gas wells, and 40 per cent were dry. During the same time period, 133 horizontal wells were also drilled, mostly for petroleum. The most active operator was Talisman Energy, which drilled 101 of the 133 horizontal wells. The remainder were drilled by 12 other companies. Of the horizontal wells, 64 per cent became oil wells, 19 per cent became gas wells, and 17 per cent were dry. This presentation included graphs depicting which oil and gas pools saw vertical or horizontal drilling during the designated time period, and explained how the wells were classified. Both horizontal and vertical well targets were illustrated. Particular reference was made to Talisman Energy's Lake Erie Drilling program which revealed that horizontal wells have an initial production rate that is 5 times that expected from vertical wells. The Hillman Pool case study revealed that the initial rate of the average horizontal well is less than half that of the average vertical well. Horizontal drilling in the Lake Erie Morpeth Gas pool has also been a commercial success. This paper demonstrates that operators have maintained Ontario's oil and gas production at high levels. In 1997 widespread horizontal drilling began taking place in Ontario, and since then, approximately 30 per cent of the wells drilled in the province have been horizontal. 16 figs.
The Ecological History of Lake Ontario According to Phytoplankton
Allinger, L. E.; Reavie, E. D.
2014-12-01
Lake Ontario's water quality has fluctuated since European settlement and our understanding of the cause-and-effect linkages between observed ecosystem shifts and stressors are evolving and improving. Changes in the physical and chemical environment of the lake due to non-indigenous species, pollution, sedimentation, turbidity and climate change altered the pelagic primary producers, so algal assessments have been valuable for tracking long-term conditions. We present a chronological account of pelagic algal assessments and some nearshore areas to summarize past and present environmental conditions in Lake Ontario. This review particularly focuses on diatom-based assessments as their fossils in sediments have revealed the combined effects of environmental insults and recovery. This review recaps the long-term trends according to three unique regions: Hamilton Harbor, the main lake basin and the Bay of Quinte. We summarize pre-European settlement, eutrophication throughout most of the 20th century, subsequent water quality improvement due to nutrient reductions and filter-feeding dreissenid colonization and contemporary pelagic, shoreline and embayment impairments. Recent pelagic phytoplankton data suggest that although phytoplankton biovolume remains stable, species composition has shifted to an increase in spring eutrophic diatoms and summer blue-green algae. Continued monitoring and evaluation of historical data will assist in understanding and responding to the natural and anthropogenic drivers of Lake Ontario's environmental conditions. As such we have initiated a new paleolimnological investigation, supported by the Environmental Protection Agency-Great Lakes National Program Office, to reconstruct the long-term environmental history of Lake Ontario and will present preliminary results.
Hamilton y el Descubrimiento de los Cuaterniones
José Manuel Sánchez Muñoz
2011-10-01
Full Text Available Este artículo pretende ofrecer una visión general del descubrimiento de los llamados cuaterniones por parte del matemático irlandés William Rowan Hamilton. Se pretende dar al lector algunos detalles del nacimiento de los números imaginarios en el siglo XVI, su interpretación geométrica a principios del siglo XIX, y la extensión del plano complejo a las tres dimensiones a través de los cuaterniones, que abrirían el paso al estudio y el desarrollo de las nuevas álgebras no conmutativas y a una nueva interpretación tridimensional de la realidad física.
Viscous warm inflation: Hamilton-Jacobi formalism
Akhtari, L.; Mohammadi, A.; Sayar, K.; Saaidi, Kh.
2017-04-01
Using Hamilton-Jacobi formalism, the scenario of warm inflation with viscous pressure is considered. The formalism gives a way of computing the slow-rolling parameter without extra approximation, and it is well-known as a powerful method in cold inflation. The model is studied in detail for three different cases of the dissipation and bulk viscous pressure coefficients. In the first case where both coefficients are taken as constant, it is shown that the case could not portray warm inflationary scenario compatible with observational data even it is possible to restrict the model parameters. For other cases, the results shows that the model could properly predicts the perturbation parameters in which they stay in perfect agreement with Planck data. As a further argument, r -ns and αs -ns are drown that show the acquired result could stand in acceptable area expressing a compatibility with observational data.
Hamilton-Jacobi skeleton on cortical surfaces.
Shi, Y; Thompson, P M; Dinov, I; Toga, A W
2008-05-01
In this paper, we propose a new method to construct graphical representations of cortical folding patterns by computing skeletons on triangulated cortical surfaces. In our approach, a cortical surface is first partitioned into sulcal and gyral regions via the solution of a variational problem using graph cuts, which can guarantee global optimality. After that, we extend the method of Hamilton-Jacobi skeleton [1] to subsets of triangulated surfaces, together with a geometrically intuitive pruning process that can trade off between skeleton complexity and the completeness of representing folding patterns. Compared with previous work that uses skeletons of 3-D volumes to represent sulcal patterns, the skeletons on cortical surfaces can be easily decomposed into branches and provide a simpler way to construct graphical representations of cortical morphometry. In our experiments, we demonstrate our method on two different cortical surface models, its ability of capturing major sulcal patterns and its application to compute skeletons of gyral regions.
Canonical equations of Hamilton with beautiful symmetry
Liang, Guo
2012-01-01
The Hamiltonian formulation plays the essential role in constructing the framework of modern physics. In this paper, a new form of canonical equations of Hamilton with the complete symmetry is obtained, which are valid not only for the first-order differential system, but also for the second-order differential system. The conventional form of the canonical equations without the symmetry [Goldstein et al., Classical Mechanics, 3rd ed, Addison-Wesley, 2001] are only for the second-order differential system. It is pointed out for the first time that the number of the canonical equations for the first-order differential system is half of that for the second-order differential system. The nonlinear Schr\\"{o}dinger equation, a universal first-order differential system, can be expressed with the new canonical equations in a consistent way.
Stability of Controlled Hamilton Systems Excited by Gaussian White Noise
SHANG Mei; GUO Yong-xin; MEI Feng-xiang
2008-01-01
A new method is introduced in this paper. This method can be used to study the stability of controlled holonomic Hamilton systems under disturbance of Gaussian white noise. At first, the motion equation of controlled holonomic Hamilton systems excited by Gaussian noise is formulated. A theory to stabilize the system is provided. Finally, one example is given to illustrate the application procedures.
On the Hamilton-Jacobi Treatment of Constrained Systems
Sami.I.Muslih; Hosam A.El-Zalan
2003-01-01
Systems with singular-higher order Lagrangians are investigated by two methods: Dirac method and Hamilton-Jacobi method. An example is studied and it is shown that the Hamilton-Jacobi method gives the correct canonical generalized equations of motion, contrary to Dirac method, where Dirac conjecture is invalid.
Invariant surfaces and tracking by the Hamilton-Jacobi method
Warnock, R.L.; Ruth, R.D.
1986-09-01
The Hamilton-Jacobi method is described for a model of betatron motion in one degree of freedom, namely, a harmonic oscillator perturbed by a lattice of sextupoles. The Hamilton-Jacobi equation is given in terms of Fourier amplitudes. Invariant surfaces have been obtained in phase space, and finite time symplectic maps were obtained for tracking of single particles. (LEW)
78 FR 43838 - Airworthiness Directives; Hamilton Sundstrand Corporation Propellers
2013-07-22
..., Engine & Propeller Directorate, Aircraft Certification Service. BILLING CODE 4910-13-P ...-48-AD RIN 2120-AA64 Airworthiness Directives; Hamilton Sundstrand Corporation Propellers AGENCY... had applied to certain Hamilton Sundstrand Corporation 14SF-7, 14SF-15, and 14SF-23 series...
International Student Support Services at Ontario Universities
Smith, Clayton; Whiteside, Brenda; Blanchard, Suzanne; Martin, Chris
2013-01-01
In this article, the Ontario Committee on Student Affairs and the Ontario Undergraduate Student Alliance partnered to examine the availability and use of international student support services at Ontario universities. Results of the recently administered Ontario Committee on Student Affairs, Canadian Bureau of International Education, and…
Ontario Teachers' Deprofessionalization and Proletarianization.
Filson, Glen
1988-01-01
Discusses teachers' class location in capitalist societies in terms of major sociological perspectives. Identifies corporate capitalist class categories that distinguish professionals from proletarians, and applies these categories to Ontario teachers at different occupational levels. (44 references) (SV)
A Hamilton-Jacobi Formalism for Thermodynamics
Rajeev, S G
2007-01-01
We show that classical thermodynamics has a formulation in terms of Hamilton-Jacobi theory, analogous to mechanics. Even though the thermodynamic variables come in conjugate pairs such as pressure/volume or temperature/entropy, the phase space is odd-dimensional. For a system with \\m{n} thermodynamic degrees of freedom it is \\m{2n+1}-dimensional. The equations of state of a substance pick out an \\m{n}-dimensional submanifold. A family of substances whose equations of state depend on \\m{n} parameters define a hypersurface of co-dimension one. This can be described by the vanishing of a function which plays the role of a Hamiltonian. The ordinary differential equations (characteristic equations) defined by this function describe a dynamical system on the hypersurface. Its orbits can be used to reconstruct the equations of state. The `time' variable associated to this dynamics is related to, but is not identical to, entropy. After developing this formalism on well-grounded systems such as the van der Waals gases...
Lenters, M. [Roundabouts Canada, Whitby, ON (Canada)
2003-07-01
The capacity and safety advantages of roundabouts over traffic signals is being increasingly recognized to moderate high traffic flow. The feasibility of establishing a roundabout at the intersection of Wilson Street, Meadowbrook Drive, and Hamilton Drive in the Town of Ancaster, Ontario was studied. A preliminary analysis of the potential operational performance of a modern roundabout for this intersection was conducted by SRM Associates, also known as Roundabouts Canada. Traffic capacity performance between a roundabout and a traffic signal was compared, as well as a cost benefit comparison (including a life cycle cost analysis) of a signalised intersection versus a roundabout. A capacity and safety prediction model, RODEL, was used to develop preliminary geometric parameters and the safety performance prediction for a roundabout. The results indicated that the implementation of a roundabout at said intersection would be beneficial in terms of traffic capacity and operational performance. It is expected that traffic flow in the next 20 to 25 years will not generate excessive queuing or delay. Consultations with the public have shown that the roundabout was the preferred intersection control. A single lane roundabout with single lane entries and exits was recommended. 6 refs., 8 figs.
Sam D. Hamilton Noxubee National Wildlife Refuge: Comprehensive Conservation Plan
US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan (CCP) was written to guide management on Sam D. Hamilton Noxubee NWR for the next 15 years. This plan outlines the Refuge vision...
Hamilton-Jakobi method for classical mechanics in Grassmann algebra
Tabunshchyk, K. V.
1998-01-01
We present the Hamilton-Jakobi method for the classical mechanics with constrains in Grassmann algebra. In the frame of this method the solution for the classical system characterized by the SUSY Lagrangian is obtained.
Hamilton´s Principle and Electric Circuits Tudory
2006-01-01
In the theory of electrical or electromechanical circuits different methods are known for construction of mathematical model. In this paper another, alternative method is introduced that is based on Hamilton variational principle that is generally valid in physics.
Researcher Profile: An Interview with Axton Betz-Hamilton
Axton Betz-Hamilton
2015-07-01
Full Text Available Dr. Axton Betz-Hamilton teaches consumer studies courses at Eastern Illinois University, including Personal and Family Finance, Housing, and Consumer Issues. She conducts research on identity theft as well as financial abuse within families.
Packing tight Hamilton cycles in 3-uniform hypergraphs
Frieze, Alan; Loh, Po-Shen
2010-01-01
Let H be a 3-uniform hypergraph with N vertices. A tight Hamilton cycle C \\subset H is a collection of N edges for which there is an ordering of the vertices v_1, ..., v_N such that every triple of consecutive vertices {v_i, v_{i+1}, v_{i+2}} is an edge of C (indices are considered modulo N). We develop new techniques which enable us to prove that under certain natural pseudo-random conditions, almost all edges of H can be covered by edge-disjoint tight Hamilton cycles, for N divisible by 4. Consequently, we derive the corollary that random 3-uniform hypergraphs can be almost completely packed with tight Hamilton cycles w.h.p., for N divisible by 4 and P not too small. Along the way, we develop a similar result for packing Hamilton cycles in pseudo-random digraphs with even numbers of vertices.
THE RELAXING SCHEMES FOR HAMILTON-JACOBI EQUATIONS
Hua-zhong Tang; Hua-mu Wu
2001-01-01
Hamilton-Jacobiequation appears frequently in applications, e.g., in differential games and control theory, and is closely related to hyperbolic conservation laws[3, 4, 12]. This is helpful in the design of difference approximations for Hamilton-Jacobi equation and hyperbolic conservation laws. In this paper we present the relaxing system for HamiltonJacobiequations in arbitrary space dimensions, and high resolution relaxing schemes for Hamilton-Jacobi equation, based on using the local relaxation approximation. The schemes are numerically tested on a variety of 1D and 2D problems, including a problem related to optimal control problem. High-order accuracy in smooth regions, good resolution of discontinuities, and convergence to viscosity solutions are observed.
Hamilton Jeffers and the Double Star Catalogues
Tenn, Joseph S.
2013-01-01
Astronomers have long tracked double stars in efforts to find those that are gravitationally-bound binaries and then to determine their orbits. Court reporter and amateur astronomer Shelburne Wesley Burnham (1838-1921) published a massive double star catalogue containing more than 13,000 systems in 1906. The next keeper of the double stars was Lick Observatory astronomer Robert Grant Aitken (1864-1951), who produced a much larger catalogue in 1932. Aitken maintained and expanded Burnham’s records of observations on handwritten file cards, eventually turning them over to Lick Observatory astrometrist Hamilton Moore Jeffers (1893-1976). Jeffers further expanded the collection and put all the observations on punched cards. With the aid of Frances M. "Rete" Greeby (1921-2002), he made two catalogues: an Index Catalogue with basic data about each star, and a complete catalogue of observations, with one observation per punched card. He enlisted Willem van den Bos of Johannesburg to add southern stars, and they published the Index Catalogue of Visual Double Stars, 1961.0. As Jeffers approached retirement he became greatly concerned about the disposition of the catalogues. He wanted to be replaced by another "double star man," but Lick Director Albert E. Whitford (1905-2002) had the new 120-inch reflector, the world’s second largest telescope, and he wanted to pursue modern astrophysics instead. Jeffers was vociferously opposed to turning over the card files to another institution, and especially against their coming under the control of Kaj Strand of the U.S. Naval Observatory. In the end the USNO got the files and has maintained the records ever since, first under Charles Worley (1935-1997), and, since 1997, under Brian Mason. Now called the Washington Double Star Catalog (WDS), it is completely online and currently contains more than 1,000,000 measures of more than 100,000 pairs.
Transboundary air pollution in Ontario
Yap, D.; Reid, N.; De Brou, G.; Bloxam, R. [Ontario Ministry of the Environment and Energy, Toronto, ON (Canada)
2005-06-01
This report examines the role of transboundary air pollution from an Ontario perspective, specifically the impacts of smog associated with both ground level ozone and fine particulate matter coming from the United States. Measurements and computer modeling have provided compelling evidence regarding the impact of transboundary pollution in Ontario. This paper presents an assessment of the human health and economic costs associated with transboundary air pollution. It also examines the impact of Ontario's emissions on other jurisdictions and reviews emission control programs, and initiatives and agreements that are being undertaken or considered to address these transboundary problems. Particular attention is given to the impacts of mercury and acid deposition. The report concludes that unique features exist in the regional climate that lead to elevated episodic conditions of poor air quality over southern Ontario. Transboundary transport of pollution is a very significant source of regionally elevated air quality levels in Ontario. Furthermore, there is an urgency to address the unacceptable health impacts and environmental consequences. 29 refs., 13 tabs., 33 figs., 1 app.
Reforming Ontario Early Learning: A Review
Ryan, Thomas; Date, Gavin
2014-01-01
Herein, we address the reformation of Ontario early learning. Over the next 3 years, all 4- and 5-year-olds in Ontario (Canada) will be able to attend full-day early learning with child care, before and after school provided by the Government of Ontario Ministry of Education. The benefits of such a change are both academic and societal and are…
Transmission system planning in Ontario
Barrie, D.; Macedo, F.X.; Mcconnach, J.S. [Ontario Hydro, Toronto, ON (Canada)
1994-12-31
In recent years, new and modified approaches to planning the large transmission system that serves the province of Ontario, Canada, have been necessary to accommodate the rapidly changing planning environment including slower uncertain growth, ageing of facilities, integration of demand side management and non utility generation options, increased competitiveness, increased financial stresses and affordable constraints. This paper describes some of the new and modified approaches and tools that have been adopted or are being developed by Ontario Hydro to cope with this changing environment. (author) 9 refs., 4 figs.
Geometric Hamilton-Jacobi theory on Nambu-Poisson manifolds
de León, M.; Sardón, C.
2017-03-01
The Hamilton-Jacobi theory is a formulation of classical mechanics equivalent to other formulations as Newtonian, Lagrangian, or Hamiltonian mechanics. The primordial observation of a geometric Hamilton-Jacobi theory is that if a Hamiltonian vector field XH can be projected into the configuration manifold by means of a 1-form dW, then the integral curves of the projected vector field XHd Wcan be transformed into integral curves of XH provided that W is a solution of the Hamilton-Jacobi equation. Our aim is to derive a geometric Hamilton-Jacobi theory for physical systems that are compatible with a Nambu-Poisson structure. For it, we study Lagrangian submanifolds of a Nambu-Poisson manifold and obtain explicitly an expression for a Hamilton-Jacobi equation on such a manifold. We apply our results to two interesting examples in the physics literature: the third-order Kummer-Schwarz equations and a system of n copies of a first-order differential Riccati equation. From the first example, we retrieve the original Nambu bracket in three dimensions and from the second example, we retrieve Takhtajan's generalization of the Nambu bracket to n dimensions.
Planktonic diatoms of Lake Ontario
Reinwand, Jerry F.
1969-01-01
The major species of diatoms in surface collections from Lake Ontario in September 1964 were Asterionella formosa, Fragilaria crotonensis, and Tabellaris fenestrata. Dominant species in the deep-water samples were Stephanodiscus astraea, S. astraea var. mintula, and F. crotonensis. The diatom flora in surface collections varied among several stations in the eastern end of the lake.
Becker, Daniela
2011-07-01
As a result of the Green Energy Act, the installed PV capacity in the Canadian province of Ontario has tripled in the year 2010. A generous feed-in tariff, aiming at maximum local added value, has attracted numerous international manufacturers. However, the rigorous rules committing the companies to 60 % inland production have provoked harsh criticism. (orig.)
Solution Hamilton-Jacobi equation for oscillator Caldirola-Kanai
LEONARDO PASTRANA ARTEAGA
2016-12-01
Full Text Available The method allows Hamilton-Jacobi explicitly determine the generating function from which is possible to derive a transformation that makes soluble Hamilton's equations. Using the separation of variables the partial differential equation of the first order called Hamilton-Jacobi equation is solved; as a particular case consider the oscillator Caldirola-Kanai (CK, which is characterized in that the mass presents a temporal evolution exponentially . We demonstrate that the oscillator CK position presents an exponential decay in time similar to that obtained in the damped sub-critical oscillator, which reflects the dissipation of total mechanical energy. We found that in the limit that the damping factor is small, the behavior is the same as an oscillator with simple harmonic motion, where the effects of energy dissipation is negligible.
Geometrical Field Theory of Hamilton Dynamic System In Rational Mechanics
Jianhua, Xiao
2011-01-01
When a set of particles are moving in a potential field, two aspects are concerned: 1) the relative motion of particle in spatial domain; 2) the particle velocity variations in time domain. The difficulty on treating the systems is originated from the fact that the motion in time domain and the motion in spatial domain are coupled together completely. Generally, for a Hamilton dynamic system established by a set of general velocity functions, several abstract theories have been well established, such as Lie algebra, Symplectic manifold, Poisson brackets, and others. However, mathematically, to find out a general Hamilton function is very difficult even for very simple problems. Inspired by these abstract mathematic researches, the Hamilton dynamic system is studied by geometrical field theory of deformation. Firstly, referring to the instant configuration, the deformation tensor in spatial domain and the velocity transformation tensor in time domain are established for a dynamic system defined by a set of gen...
Quantum Hamilton-Jacobi Cosmology and Classical-Quantum Correlation
Fathi, M.; Jalalzadeh, S.
2017-07-01
How the time evolution which is typical for classical cosmology emerges from quantum cosmology? The answer is not trivial because the Wheeler-DeWitt equation is time independent. A framework associating the quantum Hamilton-Jacobi to the minisuperspace cosmological models has been introduced in Fathi et al. (Eur. Phys. J. C 76, 527 2016). In this paper we show that time dependence and quantum-classical correspondence both arise naturally in the quantum Hamilton-Jacobi formalism of quantum mechanics, applied to quantum cosmology. We study the quantum Hamilton-Jacobi cosmology of spatially flat homogeneous and isotropic early universe whose matter content is a perfect fluid. The classical cosmology emerge around one Planck time where its linear size is around a few millimeter, without needing any classical inflationary phase afterwards to make it grow to its present size.
A Quantum Algorithm for Finding a Hamilton Circuit
GUO Hao; LONG Gui-Lu; SUN Yang; XIU Xiao-Lin
2001-01-01
A quantum algorithm for solving the classical NP-complete problem - the Hamilton circuit is presented. The algorithm employs the quantum SAT and the quantum search algorithms. The algorithm is square-root faster than classical algorithm, and becomes exponentially faster than classical algorithm if nonlinear quantum mechanical computer is used.
Hamilton´s Principle and Electric Circuits Tudory
Daniel Mayer
2006-01-01
Full Text Available In the theory of electrical or electromechanical circuits different methods are known for construction of mathematical model. In this paper another, alternative method is introduced that is based on Hamilton variational principle that is generally valid in physics.
Spin Hamilton Operators, Symmetry Breaking, Energy Level Crossing and Entanglement
Steeb, Willi-Hans; Hardy, Yorick; de Greef, Jacqueline
2011-01-01
We study finite-dimensional product Hilbert spaces, coupled spin systems, entanglement and energy level crossing. The Hamilton operators are based on the Pauli group. We show that swapping the interacting term can lead from unentangled eigenstates to entangled eigenstates and from an energy spectrum with energy level crossing to avoided energy level crossing.
Numerical Solution of Hamilton-Jacobi Equations in High Dimension
2012-11-23
high dimension FA9550-10-1-0029 Maurizio Falcone Dipartimento di Matematica SAPIENZA-Universita di Roma P. Aldo Moro, 2 00185 ROMA AH930...solution of Hamilton-Jacobi equations in high dimension AFOSR contract n. FA9550-10-1-0029 Maurizio Falcone Dipartimento di Matematica SAPIENZA
Hojman Exact Invariants and Adiabatic Invariants of Hamilton System
无
2007-01-01
The perturbation to Lie symmetry and adiabatic invariants are studied. Based on the concept of higherorder adiabatic invariants of mechanical systems with action of a small perturbation, the perturbation to Lie symmetry is studied, and Hojman adiabatic invariants of Hamilton system are obtained. An example is given to illustrate the application of the results.
Hamilton,Sir William Rowan(1805-1865)
2002-01-01
Shortly after Hamilton submitted his paper and while still an undergraduate,Trinity College elected him to the post of Andrews professor of astronomy and royal astronomer of Ireland’ to succeed Brinkley,who had been made a bishop. Thus an undergraduate(not quite 22years old) became ex officio an examiner of graduates who were candidates
Whittaker方程的Hamilton化%Hamiltonization of Whittaker equations
丁光涛
2010-01-01
引入Whittaker方程的Birkhoff表示,构造与该表示对应的Hamilton函数,并利用Hamilton-Poisson方法得到Whittaker方程的解.指出上述Hamilton函数与传统分析力学中Hamilton函数的区别.
Unconventional Hamilton-type variational principles for analytical mechanics
2007-01-01
According to the basic idea of classical yin-yang complementarity and modern dual-complementarity, in a simple and unified new way proposed by Luo, the un-conventional Hamilton-type variational principles of holonomic conservative system in analytical mechanics can be established systematically. This unconventional Hamilton-type variational principle can fully characterize the initial-value problem of analytical mechanics, so that it is an important innovation for the Hamilton-type variational principle. In this paper, an important integral relation is given, which can be considered as the expression of the generalized principle of virtual work for analytical mechanics in mechanics. Based on this relation, it is possible not only to obtain the principle of virtual work of holonomic conservative system in analytical mechanics, but also to derive systematically the complementary functionals for three-field and two-field unconventional variational principles, and the functional for the one-field one by the generalized Legendre transformation given in this paper. Further, with this new approach, the intrinsic relationship among various principles can be explained clearly. Meanwhile, the unconventional Hamilton-type variational principles of nonholonomic conservative system in analytical mechanics can also be established systematically in this paper.
Unconventional Hamilton-type variational principles for analytical mechanics
LUO En; LIANG LiFu; LI WeiHua
2007-01-01
According to the basic idea of classical yin-yang complementarity and modern dual-complementarity, in a simple and unified new way proposed by Luo, the unconventional Hamilton-type variational principles of holonomic conservative system in analytical mechanics can be established systematically. This unconventional Hamilton-type variational principle can fully characterize the initial-value problem of analytical mechanics, so that it is an important innovation for the Hamilton-type variational principle. In this paper, an important integral relation is given, which can be considered as the expression of the generalized principle of virtual work for analytical mechanics in mechanics. Based on this relation, it is possible not only to obtain the principle of virtual work of holonomic conservative system in analytical mechanics, but also to derive systematically the complementary functionals for three-field and two-field unconventional variational principles, and the functional for the one-field one by the generalized Legendre transformation given in this paper. Further, with this new approach, the intrinsic relationship among various principles can be explained clearly. Meanwhile, the unconventional Hamilton-type variational principles of nonholonomic conservative system in analytical mechanics can also be established systematically in this paper.
Unconventional Hamilton-type variational principles for electromagnetic elastodynamics
无
2006-01-01
According to the basic idea of classical yin-yang complementarity and modern dual-complementarity, in a simple and unified new way proposed by Luo, the unconventional Hamilton-type variational principles for electromagnetic elastodynamics can be established systematically. This new variational principles can fully characterize the initial-boundary-value problem of this dynamics. In this paper, the expression of the generalized principle of virtual work for electromagnetic dynamics is given. Based on this equation, it is possible not only to obtain the principle of virtual work in electromagnetic dynamics, but also to derive systematically the complementary functionals for eleven-field, nine-field and six-field unconventional Hamilton-type variational principles for electromagnetic elastodynamics, and the potential energy functionals for four-field and three-field ones by the generalized Legendre transformation given in this paper. Furthermore, with this approach, the intrinsic relationship among various principles can be explained clearly.
Beam dynamics with the Hamilton-Jacobi equation
Gabella, W.E.; Ruth, R.D.; Warnock, R.L.
1989-03-01
We describe a non-perturbative method to solve the Hamilton-Jacobi equation for invariant surfaces in phase space. The problem is formulated in action-angle variables with a general nonlinear perturbation. The solution of the Hamilton-Jacobi equation is regarded as the fixed point of a map on the Fourier coefficients of the generating function. Periodicity of the generator in the independent variable is enforced with a shooting method. We present two methods for finding the fixed point and hence the invariant surface. A solution by plain iteration is economical but has a restricted domain of convergence. The Newton iteration is costly but yields solutions up to the dynamic aperture. Examples of lattices with sextupoles for chromatic correction are discussed. 10 refs., 5 figs., 1 tab.
Studying on Opinion Evolution by Hamilton-Jacobi Equation
Feng, Chen-Jie; Huo, Jie; Hao, Rui; Wang, Xu-Ming
2016-01-01
A physical description of an opinion evolution is conducted based on the Hamilton-Jacobi equation derived from a generalized potential and the corresponding Langevin equation. The investigation mainly focuses on the heterogeneities such as age, connection circle and overall quality of the participants involved in the opinion exchange process. The evolutionary patterns of opinion can be described by solution of the Hamilton-Jacobi equation, information entropy. The results show that the overall qualities of the participants play critical roles in forming an opinion. The higher the overall quality is, the easier the consensus can reach. The solution also demonstrates that the age and the connection circle of the agents play equally important roles in forming an opinion. The essence of the age, overall quality, and connection circle corresponds to the maturity of thought (opinion inertia), reason and intelligence, influence strength of the environment, respectively. So the information entropy distributes in the ...
Hamilton geometry: Phase space geometry from modified dispersion relations
Barcaroli, Leonardo; Gubitosi, Giulia; Loret, Niccoló; Pfeifer, Christian
2015-01-01
We describe the Hamilton geometry of the phase space of particles whose motion is characterised by general dispersion relations. In this framework spacetime and momentum space are naturally curved and intertwined, allowing for a simultaneous description of both spacetime curvature and non-trivial momentum space geometry. We consider as explicit examples two models for Planck-scale modified dispersion relations, inspired from the $q$-de Sitter and $\\kappa$-Poincar\\'e quantum groups. In the first case we find the expressions for the momentum and position dependent curvature of spacetime and momentum space, while for the second case the manifold is flat and only the momentum space possesses a nonzero, momentum dependent curvature. In contrast, for a dispersion relation that is induced by a spacetime metric, as in General Relativity, the Hamilton geometry yields a flat momentum space and the usual curved spacetime geometry with only position dependent geometric objects.
Hamilton-Jacobi formalism of tachyon inflation and cosmological perturbations
LIU Daojun
2014-08-01
Full Text Available We study the cosmological inflation models driven by the rolling tachyon field which has a Born-Infeld-type action.We drive the Hamilton-Jacobi equation for the cosmological dynamics of tachyon inflation and the mode equations for the scalar and tensor perturbations of tachyon field and spacetime, then a solution under the slow-roll condition is given. In the end,a realistic model from string theory is discussed.
Sir William Rowan Hamilton: Life, Achievements, Stature in Physics
2016-06-01
Against the background of the development ofphysics, and in particular of mechanics, over thecenturies since Galileo and Newton, we describethe life and work of William Rowan Hamilton inthe 19th century. The depth of his ideas whichbrought together the understanding of ray opticsand classical mechanics, and the remarkableways in which his work paved the way to theconstruction of quantum mechanics in the 20thcentury, are emphasized.
Wave-Particle Duality and the Hamilton-Jacobi Equation
Sivashinsky, Gregory I
2009-01-01
The Hamilton-Jacobi equation of relativistic quantum mechanics is revisited. The equation is shown to permit solutions in the form of breathers (oscillating/spinning solitons), displaying simultaneous particle-like and wave-like behavior. The de Broglie wave thus acquires a clear deterministic meaning of a wave-like excitation of the classical action function. The problem of quantization in terms of the breathing action function and the double-slit experiment are discussed.
Hamilton,Sir William Rowan(1805-1865)
2002-01-01
Irish mathematician and astronomer who developed the theory of quaternions, a landmark in the development of algebra,and discovered the phenomenon of conical refraction. His unification of dynamics and optics,moreover,has had alasting influence on mathematical physics, even though the full significance of his work was not fully appreciated until after the risd of quantum mechanics. Like his English contemporaries Thomas Babington Macaulay and John Stuart Mill,Hamilton showed
Conformal invariance and Hojman conserved quantities of canonical Hamilton systems
Liu Chang; Liu Shi-Xing; Mei Feng-Xiang; Guo Yong-Xin
2009-01-01
This paper discusses the conformal invariance by infinitesimal transformations of canonical Hamilton systems. The necessary and sufficient conditions of conformal invariance being Lie symmetrical simultaneously by the action of infinitesimal transformations are given. The determining equations of the conformal invariance are gained. Then the Hojman conserved quantities of conformal invariance by special infinitesimal transformations are obtained. Finally an illustrative example is given to verify the results.
Hamilton-Jacobi method for a simple resonance
Rudnev, Mischa
2003-01-01
It is well known that a generic small perturbation of a Liouville-integrable Hamiltonian system causes breakup of resonant and near-resonant invariant tori. A general approach to the simple resonance case in the convex real-analytic setting is developed, based on a new technique for solving the Hamilton-Jacobi equation. It is shown that a generic perturbation creates in the core of a resonance a partially hyperbolic lower-dimensional invariant torus, whose Lagrangian stable and unstable manif...
Kinetic derivation of a Hamilton-Jacobi traffic flow model
Borsche, Raul; Kimathi, Mark
2012-01-01
Kinetic models for vehicular traffic are reviewed and considered from the point of view of deriving macroscopic equations. A derivation of the associated macroscopic traffic flow equations leads to different types of equations: in certain situations modified Aw-Rascle equations are obtained. On the other hand, for several choices of kinetic parameters new Hamilton-Jacobi type traffic equations are found. Associated microscopic models are discussed and numerical experiments are presented discussing several situations for highway traffic and comparing the different models.
Unconventional Hamilton-type variational principles for nonlinear coupled thermoelastodynamics
罗恩; 邝君尚; 黄伟江; 罗志国
2002-01-01
According to the basic idea of classical yin-yang complementarity and modem dual-com plementarity, in a simple and unified new way proposed by Luo, the unconventional Hamilton-type vari ational principles for geometrically nonlinear coupled thermoelastodynamics can be established system atically. The new unconventional Hamilton-type variational principle can fully characterize the initia boundary-value problem of this dynamics. In this paper, an important integral relation is given, which can be considered as the expression of the generalized principle of virtual work for geometrically nonlin ear coupled thermodynamics. Based on this relation, it is possible not only to obtain the principle of vir tual work in geometrically nonlinear coupled thermodynamics, but also to derive systematically the complementary functionals for eight-field, six-field, four-field and two-field unconventional Hamilton type variational principles by the generalized Legendre transformations given in this paper. Further more, with this approach, the intrinsic relationship among various principles can be explained clearly.
Examining Competition in Ontario's Higher Education Market
Farhan, Bayan Yousef
2017-01-01
Financial challenges have forced many publicly funded academic institutions in Ontario to adopt a corporate model and to use market tools to compete in the higher education market and maintain their enrolment and revenue levels. This study has analyzed how competition affects publicly funded universities in Ontario. Competition was examined by…
Libraries in Ontario: MedlinePlus
... this page: https://medlineplus.gov/libraries/ontario.html Libraries in Ontario To use the sharing features on ... JavaScript. Barrie Royal Victoria Regional Health Centre Health Library 201 Georgian Drive Barrie, ON L4M 6M2 CANADA ...
Educational Information in Ontario: A Government Perspective.
Hildebrand, B. M.
The Ontario Ministry of Education's role in funding educational research, and its procedures for the dissemination of educational research information are described. Two ministry initiatives are discussed in detail: the establishment of the Educational Information System for Ontario (EISO), a computerized search and retrieval service to access…
Protectionist Measures in Postsecondary Ontario (Canada) TESL
Jambor, Paul Z.
2012-01-01
TESL in Ontario, Canada, seems to be on an inauspicious path by having set up non-tariff protectionist measures in an apparent attempt to keep out a multinational TESL workforce, effectively going against the spirit of globalization. This paper highlights some of the differences between South Korean TEFL and TESL in Ontario; for the most part…
Hansen, Jesper Bent; Bech, Per
2011-01-01
-reporting versions (definitely and semidefinitely anchored) corresponding to the Hamilton Depression Scale (HAMD), the Hamilton Subscale (HAM6), and the Bech-Rafaelsen Melancholia Scale (MES) were compared to each other and the clinician-rated version. The unidimensional property of the sum score in each scale...
Nuclear power and the Hamilton-Jefferson debate
Hacker, A.
The basic sources of nuclear opposition derive from the philosophical arguments of Thomas Jefferson against Alexander Hamilton's vision of an industrial society with a strong central authority. Today's young people continue Jefferson's radical plea for the individual freedoms associated with personal ownership and limited government, but they accept the structure of the former while searching for the romanticism of the latter. The nuclear debate reflects this dichotomy and will continue even if the issues of waste disposal and safety are resolved. (DCK)
Multimodal electromechanical model of piezoelectric transformers by Hamilton's principle.
Nadal, Clement; Pigache, Francois
2009-11-01
This work deals with a general energetic approach to establish an accurate electromechanical model of a piezoelectric transformer (PT). Hamilton's principle is used to obtain the equations of motion for free vibrations. The modal characteristics (mass, stiffness, primary and secondary electromechanical conversion factors) are also deduced. Then, to illustrate this general electromechanical method, the variational principle is applied to both homogeneous and nonhomogeneous Rosen-type PT models. A comparison of modal parameters, mechanical displacements, and electrical potentials are presented for both models. Finally, the validity of the electrodynamical model of nonhomogeneous Rosen-type PT is confirmed by a numerical comparison based on a finite elements method and an experimental identification.
DISCONTINUOUS SOLUTIONS IN L∞ FOR HAMILTON-JACOBI EQUATIONS
无
2000-01-01
An approach is introduced to construct global discontinuous solutions in L∞ for Hamilton Jacobi equations. This approach allows the initial data only in L∞ and applies to the equations with nonconvex Hamiltonians. The profit functions are introduced to formulate the notion of discontinuous solutions in L. The existence of global discontinuous solutions in L∞ is established. These solutions in L∞ coincide with the viscosity solutions and the minimax solutions, provided that the initial data are continuous. A prototypical equation is analyzed to examine the L∞ stability of our L∞ solutions. The analysis also shows that global discontinuous solutions are determined by the topology in which the initial data are approximated.
Hamilton-Jacobi method for curved domain walls and cosmologies
Skenderis, Kostas; Townsend, Paul K.
2006-12-01
We use Hamiltonian methods to study curved domain walls and cosmologies. This leads naturally to first-order equations for all domain walls and cosmologies foliated by slices of maximal symmetry. For Minkowski and AdS-sliced domain walls (flat and closed FLRW cosmologies) we recover a recent result concerning their (pseudo)supersymmetry. We show how domain-wall stability is consistent with the instability of AdS vacua that violate the Breitenlohner-Freedman bound. We also explore the relationship to Hamilton-Jacobi theory and compute the wave-function of a 3-dimensional closed universe evolving towards de Sitter spacetime.
The Hamilton-Jacobi method and Hamiltonian maps
Abdullaev, S.S. [Institut fuer Plasmaphysik, Forschungszentrum Juelich GmbH, EURATOM Association, Trilateral Euregio Cluster, Juelich (Germany)
2002-03-29
A method for constructing time-step-based symplectic maps for a generic Hamiltonian system subjected to perturbation is developed. Using the Hamilton-Jacobi method and Jacobi's theorem in finite periodic time intervals, the general form of the symplectic maps is established. The generating function of the map is found by the perturbation method in the finite time intervals. The accuracy of the maps is studied for fully integrable and partially chaotic Hamiltonian systems and compared to that of the symplectic integration method. (author)
The Hamilton-Jacobi method and Hamiltonian maps
Abdullaev, S. S.
2002-03-01
A method for constructing time-step-based symplectic maps for a generic Hamiltonian system subjected to perturbation is developed. Using the Hamilton-Jacobi method and Jacobi's theorem in finite periodic time intervals, the general form of the symplectic maps is established. The generating function of the map is found by the perturbation method in the finite time intervals. The accuracy of the maps is studied for fully integrable and partially chaotic Hamiltonian systems and compared to that of the symplectic integration method.
Hamilton and Hardy for the 21st Century
Ogden, Trevor
2016-01-01
Hamilton and Hardy’s Industrial Toxicology is now 80 years old, and the new sixth edition links us with a pioneer era. This is an impressive book, but the usefulness of the hardback version as a reference book is unfortunately limited by its poor index. There is now an ebook version, and for the practitioner on the move this has the great advantages of searchability and portability. However, Wiley ebooks can apparently only be downloaded when first purchased, so their lifetime is limited to that of the device. The Kindle edition should avoid this shortcoming.
Trio Estonia esineb Lõuna-Ontarios
2012-01-01
Lõuna-Ontario muusikahuvilistel on tänu Eesti Sihtkapitalile Kanadas ja Cathedral Bluffs sümfooniaorkestrile harukordne võimalus saada oktoobrikuus osa kõrgetasemelise Trio Estonia musitseerimisest
Western Ontario: Waterfowl breeding population survey: 1986
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1986. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1989
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1989. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1995
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1995. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1993
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1993. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1994
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1994. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1996
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1996. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1987
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1987. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1992
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1992. The primary purpose of the survey is to provide...
The Ontario Brain Institute: completing the circle.
Stuss, Donald T
2014-11-01
The Province of Ontario recognized the pressing need to improve the understanding, diagnosis, and treatment of brain disorders. It also recognized that maximizing the existing strengths through a province-wide integrated approach was a pivotal mechanism. To achieve this, the Province established the Ontario Brain Institute. The goal of this article is to introduce the elements of the Ontario Brain Institute to the neuroscience community: the motivation for establishing it, the philosophy behind its creation, the principles guiding its development, the rapid evolution of its functional structure, the tools available to achieve its vision, and the management structure to ensure success. The singular goal of the Province and the Ontario Brain Institute is a comprehensive system that assures that basic research is embedded in the clinical system and is facilitating product development to accelerate benefits to both health and the economy of health: science with impact.
Western Ontario: Waterfowl breeding population survey: 1990
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1990. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1997
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1997. The primary purpose of the survey is to provide...
Western Ontario: Waterfowl breeding population survey: 1988
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1988. The primary purpose of the survey is to provide...
Fast methods for static Hamilton-Jacobi Partial Differential Equations
Vladimirsky, Alexander Boris
2001-05-01
The authors develop a family of fast methods approximating the solution to a wide class of static Hamilton-Jacobi partial differential equations. These partial differential equations are considered in the context of control-theoretic and front-propagation problems. In general, to produce a numerical solution to such a problem, one has to solve a large system of coupled non-linear discretized equations. The techniques use partial information about the characteristic directions to de-couple the system. Previously known fast methods, available for isotropic problems, are discussed in detail. They introduce a family of new Ordered Upwinding Methods (OUM) for general (anisotropic) problems and prove convergence to the viscosity solution of the corresponding Hamilton-Jacobi partial differential equation. The hybrid methods introduced here are based on the analysis of the role played by anisotropy in the context of front propagation and optimal trajectory problems. The performance of the methods is analyzed and compared to that of several other numerical approaches to these problems. Computational experiments are performed using test problems from control theory, computational geometry and seismology.
A hybrid-stress element based on Hamilton principle
Cen, Song; Zhang, Tao; Li, Chen-Feng; Fu, Xiang-Rong; Long, Yu-Qiu
2010-08-01
A novel hybrid-stress finite element method is proposed for constructing simple 4-node quadrilateral plane elements, and the new element is denoted as HH4-3 β here. Firstly, the theoretical basis of the traditional hybrid-stress elements, i.e., the Hellinger-Reissner variational principle, is replaced by the Hamilton variational principle, in which the number of the stress variables is reduced from 3 to 2. Secondly, three stress parameters and corresponding trial functions are introduced into the system equations. Thirdly, the displacement fields of the conventional bilinear isoparametric element are employed in the new models. Finally, from the stationary condition, the stress parameters can be expressed in terms of the displacement parameters, and thus the new element stiffness matrices can be obtained. Since the required number of stress variables in the Hamilton variational principle is less than that in the Hellinger-Reissner variational principle, and no additional incompatible displacement modes are considered, the new hybrid-stress element is simpler than the traditional ones. Furthermore, in order to improve the accuracy of the stress solutions, two enhanced post-processing schemes are also proposed for element HH4-3 β. Numerical examples show that the proposed model exhibits great improvements in both displacement and stress solutions, implying that the proposed technique is an effective way for developing simple finite element models with high performance.
Fast methods for static Hamilton-Jacobi Partial Differential Equations
Vladimirsky, Alexander Boris [Univ. of California, Berkeley, CA (United States)
2001-01-01
The authors develop a family of fast methods approximating the solution to a wide class of static Hamilton-Jacobi partial differential equations. These partial differential equations are considered in the context of control-theoretic and front-propagation problems. In general, to produce a numerical solution to such a problem, one has to solve a large system of coupled non-linear discretized equations. The techniques use partial information about the characteristic directions to de-couple the system. Previously known fast methods, available for isotropic problems, are discussed in detail. They introduce a family of new Ordered Upwinding Methods (OUM) for general (anisotropic) problems and prove convergence to the viscosity solution of the corresponding Hamilton-Jacobi partial differential equation. The hybrid methods introduced here are based on the analysis of the role played by anisotropy in the context of front propagation and optimal trajectory problems. The performance of the methods is analyzed and compared to that of several other numerical approaches to these problems. Computational experiments are performed using test problems from control theory, computational geometry and seismology.
Honouring and Sustaining the Teaching Profession in Ontario. Ontario College of Teachers.
Grant, Linda R.; Adamson, Gary; Craig, Allan; Marrin, Mary; Squire, Frances A.
This paper describes theoretical, political, and practical contexts for developing standards of practice for teaching, creating a framework for career-long professional learning and establishing a set of ethical standards for the profession. It positions the work of the Ontario College of Teachers within the broader context of Ontario education…
Unconditionally stable methods for Hamilton-Jacobi equations
Karlsen, Kenneth Hvistendal; Risebro, Nils Henrik
2000-05-01
We present new numerical methods for constructing approximate solutions to the Cauchy problem for Hamilton-Jacobi equations of the form u{sub t} + H(D{sub x}u) = 0. The methods are based on dimensional splitting and front tracking for solving the associated (non-strictly hyperbolic) system of conservation laws p{sub t} + D{sub x}H(p) = 0, where p = D{sub x}u. In particular, our methods depend heavily on a front tracking method for one-dimensional scalar conservation laws with discontinuous coefficients. The proposed methods are unconditionally stable in the sense that the time step is not limited by the space discretization and they can be viewed as ''large time step'' Godunov type (or front tracking) methods. We present several numerical examples illustrating the main features of the proposed methods. We also compare our methods with several methods from the literature. (author)
The Hamilton principle for fluid binary mixtures with two temperatures
Gouin, Henri
2009-01-01
For binary mixtures of fluids without chemical reactions, but with components having different temperatures, the Hamilton principle of least action is able to produce the equation of motion for each component and a balance equation of the total heat exchange between components. In this nonconservative case, a Gibbs dynamical identity connecting the equations of momenta, masses, energy and heat exchange allows to deduce the balance equation of energy of the mixture. Due to the unknown exchange of heat between components, the number of obtained equations is less than the number of field variables. The second law of thermodynamics constrains the possible expression of a supplementary constitutive equation closing the system of equations. The exchange of energy between components produces an increasing rate of entropy and creates a dynamical pressure term associated with the difference of temperature between components. This new dynamical pressure term fits with the results obtained by classical thermodynamical a...
Surface Modification of ZnO Nanorods with Hamilton Receptors
Lukas Zeininger
2015-04-01
Full Text Available A new prototype of a Hamilton receptor suitable for the functionalization of inorganic nanoparticles was synthesized and characterized. The hydrogen bonding receptor was coupled to a catechol moiety, which served as anchor group for the functionalization of metal oxides, in particular zinc oxide. Synthesized zinc oxide nanorods [ZnO] were used for surface functionalization. The wet-chemical functionalization procedure towards monolayer-grafted particles [ZnO-HR] is described and a detailed characterization study is presented. In addition, the detection of specific cyanurate molecules is demonstrated. The hybrid structures [ZnO-HR-CA] were stable towards agglomeration and exhibited enhanced dispersability in apolar solvents. This observation, in combination with several spectroscopic experiments gave evidence of the highly directional supramolecular recognition at the surface of nanoparticles.
Geometric Hamilton-Jacobi theory for higher-order autonomous systems
Colombo, Leonardo; de León, Manuel; Prieto-Martínez, Pedro Daniel; Román-Roy, Narciso
2014-06-01
The geometric framework for the Hamilton-Jacobi theory is used to study this theory in the background of higher-order mechanical systems, in both the Lagrangian and Hamiltonian formalisms. Thus, we state the corresponding Hamilton-Jacobi equations in these formalisms and apply our results to analyze some particular physical examples.
Epilepsy Care in Ontario: An Economic Analysis of Increasing Access to Epilepsy Surgery
Bowen, James M.; Snead, O. Carter; Chandra, Kiran; Blackhouse, Gord; Goeree, Ron
2012-01-01
Background In August 2011 a proposed epilepsy care model was presented to the Ontario Health Technology Advisory Committee (OHTAC) by an Expert Panel on a Provincial Strategy for Epilepsy Care in Ontario. The Expert Panel recommended leveraging existing infrastructure in the province to provide enhanced capacity for epilepsy care. The point of entry for epilepsy care and the diagnostic evaluation for surgery candidacy and the epilepsy surgery would occur at regional and district epilepsy centres in London, Hamilton, Toronto, and Ottawa and at new centres recommended for northern and eastern Ontario. This economic analysis report was requested by OHTAC to provide information about the estimated budgetary impact on the Ontario health care system of increasing access to epilepsy surgery and to examine the cost-effectiveness of epilepsy surgery in both children and adults. Methods A prevalence-based “top-down” health care system budgetary impact model from the perspective of the Ministry of Health and Long-Term Care was developed to estimate the potential costs associated with expanding health care services to increase access to epilepsy care in general and epilepsy surgery in particular. A 5-year period (i.e., 2012–2016) was used to project annual costs associated with incremental epilepsy care services. Ontario Health Survey estimates of epilepsy prevalence, published epilepsy incidence data, and Canadian Census results for Ontario were used to approximate the number of individuals with epilepsy in the province. Applying these population estimates to data obtained from a recent field evaluation study that examined patterns of care and costs associated with epilepsy surgery in children, a health care system budget impact was calculated and the total costs and incremental costs associated with increasing access to surgery was estimated. In order to examine the cost-effectiveness of epilepsy surgery in children, a decision analysis compared epilepsy surgery to
Saroj K. Ghosh
2015-05-01
Full Text Available The histological features and histochemical characterization of the stomach were investigated in Mystus cavasius (Hamilton, Oreochromis niloticus (Linnaeus and Gudusia chapra (Hamilton having different feeding habits. Histologically the stomach of all the three fishes was made up of mucosa, submucosa, muscularis and serosa. The mucosa of superficial epithelium consists of a single layer of compactly arranged columnar epithelial cells. Prominent gastric glands are present in M. cavasius whereas in G. chapra the gastric glands are totally absent in the gizzard like stomach. However, in O. niloticus tubular gastric glands are present in the glandular epithelium of caecal like stomach. The distribution and chemical nature of mucopolysaccharides in the aforementioned fishes were studied histochemically by employing Periodic Acid Schiff’s in combination with the Alcian Blue (PAS–AB technique. Columnar epithelial cells lining the mucosa of the stomach including mucosal border were provided with exclusively neutral mucin which was probably involved in the protective functions against acid and enzymes. The different intensities of reaction of Best Carmine (BC for glycogen in the epithelial lining and gastric glands of the stomach of the aforesaid three fish species under study were discussed. The intense reaction for protein and tryptophan was noticed in the gastric epithelium and gastric glands of M. cavasius probably due to accumulation of zymogen granules in the gastric glands. On the contrary, moderate reaction for protein and tryptophan was associated with the epithelial cells and gastric glands of O. niloticus and G. chapra. The cytoarchitecture and different degrees of localization of mucopolysaccharides, glycogen, protein and tryptophan in the stomach of M. cavasius, O. niloticus and G. chapra were correlated with the functional significance of the region concerned.
Early Days for the Differentiation Policy Framework in Ontario
Sianos, Helen
2017-01-01
The Ontario Ministry of Training, Colleges and Universities in Canada released "Ontario's Differentiation Policy Framework for Postsecondary Education" in 2013. This chapter examines the mandate as it pertains to the college sector.
Lessons learned from Ontario wind energy disputes
Fast, Stewart; Mabee, Warren; Baxter, Jamie; Christidis, Tanya; Driver, Liz; Hill, Stephen; McMurtry, J. J.; Tomkow, Melody
2016-02-01
Issues concerning the social acceptance of wind energy are major challenges for policy-makers, communities and wind developers. They also impact the legitimacy of societal decisions to pursue wind energy. Here we set out to identify and assess the factors that lead to wind energy disputes in Ontario, Canada, a region of the world that has experienced a rapid increase in the development of wind energy. Based on our expertise as a group comprising social scientists, a community representative and a wind industry advocate engaged in the Ontario wind energy situation, we explore and suggest recommendations based on four key factors: socially mediated health concerns, the distribution of financial benefits, lack of meaningful engagement and failure to treat landscape concerns seriously. Ontario's recent change from a feed-in-tariff-based renewable electricity procurement process to a competitive bid process, albeit with more attention to community engagement, will only partially address these concerns.
Assessing Ontario's Personal Support Worker Registry
Audrey Laporte
2013-08-01
Full Text Available In response to the growing role of personal support workers (PSWs in the delivery of health care services to Ontarians, the Ontario government has moved forward with the creation of a PSW registry. This registry will be mandatory for all PSWs employed by publicly funded health care employers, and has the stated objectives of better highlighting the work that PSWs do in Ontario, providing a platform for PSWs and employers to more easily access the labour market, and to provide government with information for human resources planning. In this paper we consider the factors that brought the creation of a PSW registry onto the Ontario government’s policy agenda, discuss how the registry is being implemented, and provide an analysis of the strengths and weaknesses of this policy change.
The Ontario Telemedicine Network: a case report.
Brown, Edward M
2013-05-01
This article describes the evolution, current status, and future prospects of the Ontario Telemedicine Network (OTN). Started in the late 1990s (and formally established in 2006), OTN is a not-for-profit corporation primarily funded by the Government of Ontario, Canada, that aims to improve access to and quality of care throughout the Province. It covers a land mass larger than France and serves a population of just over 13 million, the vast majority of which live in a narrow strip close to the U.S. border. Telemedicine has been effective in reducing travel to usual sources of care, reducing hospital admissions, and improving efficiency and prompt access to care. The diffusion of telemedicine is accelerating in Ontario, and it is becoming an integral part of the health system.
"Strengthening" Ontario Universities: A Neoliberal Reconstruction of Higher Education
Rigas, Bob; Kuchapski, Renée
2016-01-01
This paper reviews neoliberalism as an ideology that has influenced higher education generally and Ontario higher education in particular. It includes a discourse analysis of "Strengthening Ontario's Centres of Creativity, Innovation and Knowledge" (Ontario Ministry of Training, Colleges, and Universities, 2012), a government discussion…
Opening Doors to Nursing Degrees: A Proposal from Ontario's Colleges
Colleges Ontario, 2010
2010-01-01
Ontario needs to expand nursing education options to improve access to the nursing profession, create better pathways amongst all nursing occupations, and build Ontario's capacity to meet the province's long-term nursing needs. Ontario's colleges are capable of playing a larger role within a long-term provincial strategy for sustaining and…
A Report on Accounting Education in Ontario Universities.
Council of Ontario Universities, Toronto.
A 1981 report on accounting education in Ontario universities, which was prepared by a study group of the Council of Ontario Universities (COU), is presented. The objective was to advise the COU on the feasibility of establishing a professional school or faculty of accounting in one or more Ontario universities. Attention was directed to the…
无向完全图的哈密顿回路%Hamilton Circles of No Direction Graph
梁震; 陈新军
2000-01-01
In this article,a way of finding all Hamilton cycles of a perfect no direction graph will be presented.Then we can find out the formula of all Hamilton circles of a perfect no direction graph.Finally the way will be expanded to other cases like finding whether a graph has Hamilton cycles or not.
Colleges Ontario, 2009
2009-01-01
Ontario has an opportunity to implement meaningful and transformational changes that exploit the potential for growth in the new economy and drive it's prosperity to unprecedented levels. But the threats to Ontario's future are just as great. Failing to move forward now with significant measures could leave Ontario unprepared for the challenges…
Colleges Ontario, 2009
2009-01-01
Ontario's colleges share the provincial government's belief that apprenticeship must play a greater role in addressing skills shortages and contributing to innovative, high-performance workplaces that enhance Ontario's competitiveness. Given the severity of the economic downturn, Ontario faces an immediate, serious challenge as apprenticeship…
The fate of Hamilton's Hodograph in Special and General Relativity
Gibbons, G W
2015-01-01
The hodograph of a non-relativistic particle motion in Euclidean space is the curve described by its momentum vector. For a general central orbit problem the hodograph is the inverse of the pedal curve of the orbit, (i.e. its polar reciprocal), rotated through a right angle. Hamilton showed that for the Kepler/Coulomb problem, the hodograph is a circle whose centre is in the direction of a conserved eccentricity vector. The addition of an inverse cube law force induces the eccentricity vector to precess and with it the hodograph. The same effect is produced by a cosmic string. If one takes the relativistic momentum to define the hodograph, then for the Sommerfeld (i.e. the special relativistic Kepler/Coulomb problem) there is an effective inverse cube force which causes the hodograph to precess. If one uses Schwarzschild coordinates one may also define a a hodograph for timelike or null geodesics moving around a black hole. Iheir pedal equations are given. In special cases the hodograph may be found explicitl...
Singular Hamilton-Jacobi equation for the tail problem
Mirrahimi, Sepideh; Perthame, Benoit; Souganidis, Panagiotis E
2010-01-01
In this paper we study the long time-long range behavior of reaction diffusion equations with negative square root -type reaction terms. In particular we investigate the exponential behavior of the solutions after a standard hyperbolic scaling. This leads to a Hamilton-Jacobi variational inequality with an obstacle that depends on the solution itself and defines the open set where the limiting solution does not vanish. Counter-examples show a nontrivial lack of uniqueness for the variational inequality depending on the conditions imposed on the boundary of this open set. Both Dirichlet and state constraints boundary conditions play a role. When the competition term does not change sign, we can identify the limit, while, in general, we find lower and upper bounds for the limit. Although models of this type are rather old and extinction phenomena are as important as blow-up, our motivation comes from the so-called "tail problem" in population biology. One way to avoid meaningless exponential tails, is to impose...
Hamilton's equations for a fluid membrane
Capovilla, R [Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados, Apdo. Postal 14-740, 07000 Mexico, DF (Mexico); Guven, J [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-543, 04510 Mexico, DF (Mexico); Rojas, E [Facultad de Fisica e Inteligencia Artificial, Universidad Veracruzana, 91000 Xalapa, Veracruz (Mexico)
2005-10-14
Consider a homogeneous fluid membrane described by the Helfrich-Canham energy, quadratic in the mean curvature of the membrane surface. The shape equation that determines equilibrium configurations is fourth order in derivatives and cubic in the mean curvature. We introduce a Hamiltonian formulation of this equation which dismantles it into a set of coupled first-order equations. This involves interpreting the Helfrich-Canham energy as an action; equilibrium surfaces are generated by the evolution of space curves. Two features complicate the implementation of a Hamiltonian framework. (i) The action involves second derivatives. This requires treating the velocity as a phase-space variable and the introduction of its conjugate momentum. The canonical Hamiltonian is constructed on this phase space. (ii) The action possesses a local symmetry-reparametrization invariance. The two labels we use to parametrize points on the surface are themselves physically irrelevant. This symmetry implies primary constraints, one for each label, that need to be implemented within the Hamiltonian. The two Lagrange multipliers associated with these constraints are identified as the components of the acceleration tangential to the surface. The conservation of the primary constraints implies two secondary constraints, fixing the tangential components of the momentum conjugate to the position. Hamilton's equations are derived and the appropriate initial conditions on the phase-space variables are identified. Finally, it is shown how the shape equation can be reconstructed from these equations.
Quantitative Compactness Estimates for Hamilton-Jacobi Equations
Ancona, Fabio; Cannarsa, Piermarco; Nguyen, Khai T.
2016-02-01
We study quantitative compactness estimates in {W^{1,1}_{loc}} for the map {S_t}, {t > 0} that is associated with the given initial data {u_0in Lip (R^N)} for the corresponding solution {S_t u_0} of a Hamilton-Jacobi equation u_t+Hbig(nabla_{x} ubig)=0, qquad t≥ 0,quad xinR^N, with a uniformly convex Hamiltonian {H=H(p)}. We provide upper and lower estimates of order {1/\\varepsilon^N} on the Kolmogorov {\\varepsilon}-entropy in {W^{1,1}} of the image through the map S t of sets of bounded, compactly supported initial data. Estimates of this type are inspired by a question posed by Lax (Course on Hyperbolic Systems of Conservation Laws. XXVII Scuola Estiva di Fisica Matematica, Ravello, 2002) within the context of conservation laws, and could provide a measure of the order of "resolution" of a numerical method implemented for this equation.
The Hamilton depression scale. Evaluation of objectivity using logistic models.
Bech, P; Allerup, P; Gram, L F; Reisby, N; Rosenberg, R; Jacobsen, O; Nagy, A
1981-03-01
The consistency of the Hamilton Depression Scale (HDS) as a measure of the severity of depressive states has been examined when the scale was used weekly during a trial when imipramine. By use of logistic models (Rasch) the consistency of the HDS has been considered across patient-variables as age, sex, plasma levels of imipramine, and diagnosis. The results showed that the original 17-item HDS was without adequate consistency, i.e. the total score of the sample of items was no one-dimensional measure of depressive states. However, a melancholia subscale of the HDS contained items the total of which can be used to compare patients quantitatively, although in some part of the analysis one of these items showed ceiling effect. It was concluded that the melancholia subscale (containing the items depressed mood, guilt, work and interests, retardation, psychic anxiety, and general somatic symptoms) can form the basis for further improvements in the field of quantitative rating scales for depressive states.
An electromechanical model of neuronal dynamics using Hamilton's principle
Drapaca, Corina S.
2015-01-01
Damage of the brain may be caused by mechanical loads such as penetration, blunt force, shock loading from blast, and by chemical imbalances due to neurological diseases and aging that trigger not only neuronal degeneration but also changes in the mechanical properties of brain tissue. An understanding of the interconnected nature of the electro-chemo-mechanical processes that result in brain damage and ultimately loss of functionality is currently lacking. While modern mathematical models that focus on how to link brain mechanics to its biochemistry are essential in enhancing our understanding of brain science, the lack of experimental data required by these models as well as the complexity of the corresponding computations render these models hard to use in clinical applications. In this paper we propose a unified variational framework for the modeling of neuronal electromechanics. We introduce a constrained Lagrangian formulation that takes into account Newton's law of motion of a linear viscoelastic Kelvin–Voigt solid-state neuron as well as the classic Hodgkin–Huxley equations of the electronic neuron. The system of differential equations describing neuronal electromechanics is obtained by applying Hamilton's principle. Numerical simulations of possible damage dynamics in neurons will be presented. PMID:26236195
Value Functions for Certain Class of Hamilton Jacobi Equations
Anup Biswas; Rajib Dutta; Prosenjit Roy
2011-08-01
We consider a class of Hamilton Jacobi equations (in short, HJE) of type $$u_t+\\frac{1}{2}\\left(|u_{x_n}|^2+\\cdots+|u_{x_{n-1}}|^2\\right)+\\frac{e^u}{m}|u_{x_n}|^m=0,$$ in $\\mathbb{R}^n×\\mathbb{R}_+$ and >1, with bounded, Lipschitz continuous initial data. We give a Hopf-Lax type representation for the value function and also characterize the set of minimizing paths. It is shown that the minimizing paths in the representation of value function need not be straight lines. Then we consider HJE with Hamiltonian decreasing in of type $$u_t+H_1(u_{x_1},\\ldots,u_{x_i})+e^{-u}H_2(u_{x_{i+1}},\\ldots,u_{x_n})=0$$ where $H_1,H_2$ are convex, homogeneous of degree $n,m>1$ respectively and the initial data is bounded, Lipschitz continuous. We prove that there exists a unique viscosity solution for this HJE in Lipschitz continuous class. We also give a representation formula for the value function.
An electromechanical model of neuronal dynamics using Hamilton's principle.
Drapaca, Corina S
2015-01-01
Damage of the brain may be caused by mechanical loads such as penetration, blunt force, shock loading from blast, and by chemical imbalances due to neurological diseases and aging that trigger not only neuronal degeneration but also changes in the mechanical properties of brain tissue. An understanding of the interconnected nature of the electro-chemo-mechanical processes that result in brain damage and ultimately loss of functionality is currently lacking. While modern mathematical models that focus on how to link brain mechanics to its biochemistry are essential in enhancing our understanding of brain science, the lack of experimental data required by these models as well as the complexity of the corresponding computations render these models hard to use in clinical applications. In this paper we propose a unified variational framework for the modeling of neuronal electromechanics. We introduce a constrained Lagrangian formulation that takes into account Newton's law of motion of a linear viscoelastic Kelvin-Voigt solid-state neuron as well as the classic Hodgkin-Huxley equations of the electronic neuron. The system of differential equations describing neuronal electromechanics is obtained by applying Hamilton's principle. Numerical simulations of possible damage dynamics in neurons will be presented.
An Electromechanical Model of Neuronal Dynamics using Hamilton's Principle
Corina Stefania Drapaca
2015-07-01
Full Text Available Damage of the brain may be caused by mechanical loads such as penetration, blunt force, shock loading from blast, and by chemical imbalances due to neurological diseases and aging that trigger not only neuronal degeneration but also changes in the mechanical properties of brain tissue. An understanding of the interconnected nature of the electro-chemo-mechanical processes that result in brain damage and ultimately loss of functionality is currently lacking. While modern mathematical models that focus on how to link brain mechanics to its biochemistry are essential in enhancing our understanding of brain science, the lack of experimental data required by these models as well as the complexity of the corresponding computations render these models hard to use in clinical applications. In this paper we propose a unified variational framework for the modeling of neuronal electromechanics. We introduce a constrained Lagrangian formulation that takes into account Newton's law of motion of a linear viscoelastic Kelvin-Voigt solid-state neuron as well as the classic Hodgkin-Huxley equations of the electronic neuron. The system of differential equations describing neuronal electromechanics is obtained by applying Hamilton's principle. Numerical simulations of possible damage dynamics in neurons will be presented.
Marketing the College Brand in Ontario
Holgerson, Ronald
2005-01-01
Since inception of the Ontario college system in 1967, the quality of a diploma or certificate in comparison to a university degree has been perceived as an inferior rather than alternative academic credential. As public institutions, community colleges are mandated to respond to regional labour force needs, and to provide graduates who will…
The fruit flies (Tephritidae) of Ontario
Thirteen species of Tephritidae are newly recorded from Ontario, and alternative format keys are provided to the 31 genera and 72 species of fruit fly now known from, or likely to occur, in the province. Standard dichotomous keys to genera, and simplified field keys to genera and species are provide...
Ontario's Quality Assurance Framework: A Critical Response
Heap, James
2013-01-01
Ontario's Quality Assurance Framework (QAF) is reviewed and found not to meet all five criteria proposed for a strong quality assurance system focused on student learning. The QAF requires a statement of student learning outcomes and a method and means of assessing those outcomes, but it does not require that data on achievement of intended…
The Status of Benthos in Lake Ontario
The benthic community of Lake Ontario was dominated by an amphipod (Diporeia spp.) prior to the 1990’s. Two dreissenid mussel species D. polymorpha (zebra) and D. bugensis (quagga) were introduced in 1989 and 1991 via ballast water exchange. D. bugensis was observed as deep as 85...
刘道军
2014-01-01
讨论带有Born-Infeld作用量的快子场所驱动的暴涨模型.首先给出了快子暴涨方程的Hamilton-Jacobi形式并且考虑如何去解Hamilton-Jacobi方程;然后讨论快子场的宇宙学扰动给出扰动场的模方程;最后,讨论了一个真实的由弦理论得来的滚动快子模型.
NUMERICAL METHOD BASED ON HAMILTON SYSTEM AND SYMPLECTIC ALGORITHM TO DIFFERENTIAL GAMES
无
2006-01-01
The resolution of differential games often concerns the difficult problem of two points border value (TPBV), then ascribe linear quadratic differential game to Hamilton system. To Hamilton system, the algorithm of symplectic geometry has the merits of being able to copy the dynamic structure of Hamilton system and keep the measure of phase plane. From the viewpoint of Hamilton system, the symplectic characters of linear quadratic differential game were probed; as a try, Symplectic-Runge-Kutta algorithm was presented for the resolution of infinite horizon linear quadratic differential game. An example of numerical calculation was given, and the result can illuminate the feasibility of this method. At the same time, it embodies the fine conservation characteristics of symplectic algorithm to system energy.
Hamilton-Jacobi method for classical mechanics in Grassmann algebra (in English)
Tabunshchyk, K. V.
We present the Hamilton--Jacobi method for the classical mechanics with the constrains in Grassmann algebra. Within the framework of this method the solution for the classical system characterized by the SUSY Lagrangian is obtained.
Hamilton-Jacobi theorems for regular reducible Hamiltonian systems on a cotangent bundle
Wang, Hong
2017-09-01
In this paper, some of formulations of Hamilton-Jacobi equations for Hamiltonian system and regular reduced Hamiltonian systems are given. At first, an important lemma is proved, and it is a modification for the corresponding result of Abraham and Marsden (1978), such that we can prove two types of geometric Hamilton-Jacobi theorem for a Hamiltonian system on the cotangent bundle of a configuration manifold, by using the symplectic form and dynamical vector field. Then these results are generalized to the regular reducible Hamiltonian system with symmetry and momentum map, by using the reduced symplectic form and the reduced dynamical vector field. The Hamilton-Jacobi theorems are proved and two types of Hamilton-Jacobi equations, for the regular point reduced Hamiltonian system and the regular orbit reduced Hamiltonian system, are obtained. As an application of the theoretical results, the regular point reducible Hamiltonian system on a Lie group is considered, and two types of Lie-Poisson Hamilton-Jacobi equation for the regular point reduced system are given. In particular, the Type I and Type II of Lie-Poisson Hamilton-Jacobi equations for the regular point reduced rigid body and heavy top systems are shown, respectively.
Thomas, Marion
2006-06-01
Robert Yerkes is a pivotal figure in American psychology and primatology in the first half of the twentieth century. As is well known, Yerkes first studied ape intelligence in 1915, on a visit to the private California laboratory of the psychiatrist Gilbert Hamilton, a former student. Less widely appreciated is how far the work done at the Hamilton lab, in its aims and ambitions as well as its techniques, served as a template for much of Yerkes's research thereafter. This paper uses the Hamilton-Yerkes relationship to re-examine Yerkes's career and, more generally, that of American psychology in the early twentieth century. Three points especially are emphasized: first, the role of Freudian psychoanalysis as a spur to Hamilton's experimental studies of ape intelligence; second, the importance of Hamilton's laboratory, with its semi-wild population of monkeys and ape, as a model for Yerkes's efforts to create a laboratory of his own; and third, the influence on Yerkes of Hamilton's optimism about experimental psychological studies of nonhuman primates as a source of lessons beneficial to a troubled human world.
An Outbreak of Foodborne Botulism in Ontario
Mona R Loutfy
2003-01-01
Full Text Available Botulism is a rare paralytic illness resulting from a potent neurotoxin produced by Clostridium botulinum. Botulism in Canada is predominately due to C botulinum type E and affects mainly the First Nations and Inuit populations. The most recent outbreak of botulism in Ontario was in Ottawa in 1991 and was caused by C botulinum type A. We report an outbreak of foodborne type B botulism in Ontario, which implicated home-canned tomatoes. The outbreak was characterized by mild symptoms in two cases and moderately severe illness in one case. The investigation shows the importance of considering the diagnosis of botulism in patients presenting with cranial nerve and autonomic dysfunction, especially when combined with gastrointestinal complaints; it also highlights the importance of proper home canning technique.
Upgrading the dosimetry at Ontario Hydro
Hirning, C.R. [Ontario Hydro, Whitby, ON (Canada). Health Physics Dept.
1996-12-01
Ontario Hydro has embarked upon a major programme to replace and upgrade its external dosimetry systems. In two year`s time, the utility expects to have two state-of-the-art dosimetry systems in place: a new TLD dosimetry of legal record that was designed nearly 30 years ago; and an electronic dosimetry system which could eventually replace the TLD as the primary system. (Author).
Lake trout rehabilitation in Lake Ontario
Elrod, Joseph H.; O'Gorman, Robert; Schneider, Clifford P.; Eckert, Thomas H.; Schaner, Ted; Bowlby, James N.; Schleen, Larry P.
1995-01-01
Attempts to maintain the native lake trout (Salvelinus namaycush) population in Lake Ontario by stocking fry failed and the species was extirpated by the 1950s. Hatchery fish stocked in the 1960s did not live to maturity because of sea lamprey (Petromyzon marinus) predation and incidental commercial harvest. Suppression of sea lampreys began with larvicide treatments of Lake Ontario tributaries in 1971 and was enhanced when the tributaries of Oneida Lake and Lake Erie were treated in the 1980s. Annual stocking of hatchery fish was resumed with the 1972 year class and peaked at about 1.8 million yearlings and 0.3 million fingerlings from the 1985–1990 year classes. Survival of stocked yearlings declined over 50% in the 1980 s and was negatively correlated with the abundance of lake trout > 550 mm long (r = −0.91, P < 0.01, n = 12). A slot length limit imposed by the State of New York for the 1988 fishing season reduced angler harvest. Angler harvest in Canadian waters was 3 times higher in eastern Lake Ontario than in western Lake Ontario. For the 1977–1984 year classes, mean annual survival rate of lake trout age 6 and older was 0.45 (range: 0.35–0.56). In U.S. waters during 1985–1992, the total number of lake trout harvested by anglers was about 2.4 times greater than that killed by sea lampreys. The number of unmarked lake trout < 250 mm long in trawl catches in 1978–1992 was not different from that expected due to loss of marks and failure to apply marks at the hatchery, and suggested that recruitment of naturally-produced fish was nil. However, many of the obstacles which may have impeded lake trout rehabilitation in Lake Ontario during the 1980s are slowly being removed, and there are signs of a general ecosystem recovery. Significant recruitment of naturally produced lake trout by the year 2000, one interim objective of the rehabilitation plan for the Lake, may be achieved.
A quantitative test of Hamilton's rule for the evolution of altruism.
Markus Waibel
2011-05-01
Full Text Available The evolution of altruism is a fundamental and enduring puzzle in biology. In a seminal paper Hamilton showed that altruism can be selected for when rb - c > 0, where c is the fitness cost to the altruist, b is the fitness benefit to the beneficiary, and r is their genetic relatedness. While many studies have provided qualitative support for Hamilton's rule, quantitative tests have not yet been possible due to the difficulty of quantifying the costs and benefits of helping acts. Here we use a simulated system of foraging robots to experimentally manipulate the costs and benefits of helping and determine the conditions under which altruism evolves. By conducting experimental evolution over hundreds of generations of selection in populations with different c/b ratios, we show that Hamilton's rule always accurately predicts the minimum relatedness necessary for altruism to evolve. This high accuracy is remarkable given the presence of pleiotropic and epistatic effects as well as mutations with strong effects on behavior and fitness (effects not directly taken into account in Hamilton's original 1964 rule. In addition to providing the first quantitative test of Hamilton's rule in a system with a complex mapping between genotype and phenotype, these experiments demonstrate the wide applicability of kin selection theory.
UNCONVENTIONAL HAMILTON-TYPE VARIATIONAL PRINCIPLES FOR DYNAMICS OF REISSNER SANDWICH PLATE
HUANG Wei-jiang; LUO En; SHE Hui
2006-01-01
According to the basic idea of classical yin-yang complementarity and modern dual-complementarity, in a simple and unified way proposed by Luo(1987), some unconventional Hamilton-type variational principles for dynamics of Reissner sandwich plate can be established systematically. The unconventional Hamilton-type variation principle can fully characterize the initial-boundary-value problem of this dynamics. In this paper, an important integral relation is given, which can be considered as the generalized principle of virtual work in mechanics. Based on this relation, it is possible not only to obtain the principle of virtual work in dynamics of Reissner sandwich plate, but also to derive systematically the complementary functionals for five-field, two-field and one-field unconventional Hamilton-type variational principles by the generalized Legender transformations. Furthermore, with this approach, the intrinsic relationship among the various principles can be explained clearly.
Computational method for the quantum Hamilton-Jacobi equation: one-dimensional scattering problems.
Chou, Chia-Chun; Wyatt, Robert E
2006-12-01
One-dimensional scattering problems are investigated in the framework of the quantum Hamilton-Jacobi formalism. First, the pole structure of the quantum momentum function for scattering wave functions is analyzed. The significant differences of the pole structure of this function between scattering wave functions and bound state wave functions are pointed out. An accurate computational method for the quantum Hamilton-Jacobi equation for general one-dimensional scattering problems is presented to obtain the scattering wave function and the reflection and transmission coefficients. The computational approach is demonstrated by analysis of scattering from a one-dimensional potential barrier. We not only present an alternative approach to the numerical solution of the wave function and the reflection and transmission coefficients but also provide a computational aspect within the quantum Hamilton-Jacobi formalism. The method proposed here should be useful for general one-dimensional scattering problems.
Hamilton and Hardy: Mentoring and Friendship in the Service of Occupational Health.
Sullivan, Marianne
This article explores the mentoring relationship between Alice Hamilton and Harriet Hardy, two female physician-researchers who had a tremendous impact on the development of the field of occupational health in the United States during the 20th century. The article relies on letters the women wrote to each other. Hamilton, the elder, supported and furthered Hardy's career by asking her to coauthor the second edition of a seminal occupational health text. After beginning this intellectual collaboration, Hamilton remained a mentor to Hardy, and a decades-long friendship ensued. The article explores their relationship within the historical, political, and social context in which the women worked and made remarkable contributions to public health.
On the Hamilton-Jacobi method in classical and quantum nonconservative systems
Dutra, A. de Souza; Correa, R. A. C.; Moraes, P. H. R. S.
2016-08-01
In this work we show how to complete some Hamilton-Jacobi solutions of linear, nonconservative classical oscillatory systems which appeared in the literature, and we extend these complete solutions to the quantum mechanical case. In addition, we obtain the solution of the quantum Hamilton-Jacobi equation for an electric charge in an oscillating pulsing magnetic field. We also argue that for the case where a charged particle is under the action of an oscillating magnetic field, one can apply nuclear magnetic resonance techniques in order to find experimental results regarding this problem. We obtain all results analytically, showing that the quantum Hamilton-Jacobi formalism is a powerful tool to describe quantum mechanics.
Glaucoma at the Hamilton Glaucoma Center and the University of California, San Diego
Robert N. Weinreb
2011-01-01
@@ Known for its unique cross-disciplinary investigative programs and clinical excellence, the scientists and clinicians at the Hamilton Glaucoma Center of the University of California, San Diego seek to enhance the discovery and translation of innovative research to clinical glaucoma care to prevent and cure glaucoma blindness.With state of the art laboratory and clinical facilities located on the La Jolla campus (Figure 1), the Center is a home for a worldrenowned team of scientists and staff.More than 100 post-doctoral fellows in Glaucoma, many of whom hold distinguished academic positions throughout the world, have been trained at the Hamilton Glaucoma Center and the University of California, San Diego.At the core of Hamilton Glaucoma Center activities are the outstanding faculty that are described below.
Insegnamiento dell'italiano nell'Ontario (The Teaching of Italian in Ontario)
Verna, Anthony
1972-01-01
Paper read at the International Congress of Teachers of Italian held at the Universita Italiana per Stranieri in Perugia, Italy, August 27-28, 1971. Discusses the patterns of growth of Italian studies in Ontario at high school and university levels. (DS)
Insegnamiento dell'italiano nell'Ontario (The Teaching of Italian in Ontario)
Verna, Anthony
1972-01-01
Paper read at the International Congress of Teachers of Italian held at the Universita Italiana per Stranieri in Perugia, Italy, August 27-28, 1971. Discusses the patterns of growth of Italian studies in Ontario at high school and university levels. (DS)
曹玉松
2013-01-01
从保险公司的角度出发,在投资基金价格服从带漂移的几何布朗运动的假定下,基于Hamilton-Jacobi-Bellman理论,给出了使得盈余终值的期望指数效用最大化的比例再保险函数的最优比例,及其各个风险市场的最优投资比例.%From the insurer's point of view,on the assumption that investment fund follows the Geometric Brownian motion,based on the theory of Hamilton-Jacobi-Bellman equation,the paper gives the optimal proportion of the proportional reinsurance and the capital amount of each risky investment markets,which can make the expected exponential utility of terminal wealth maximum.
Municipal-Aboriginal Relations: An Ontario Perspective
Alia Hanif
2009-05-01
Full Text Available In Canada, there are many examples of respectful relationships between municipalities and Aboriginal communities. Where Aboriginal peoples have concerns with the actions or inaction of governments (be they federal, provincial or municipal governments, it is often municipalities that are directly affected by the measures taken by Aboriginal peoples to express their concerns. To help reduce possible conflicts at the municipal level and find shared solutions, the Ministry of Municipal Affairs and Housing of the Province of Ontario has been advising municipalities in the province on the benefits of engaging and developing relationships with Aboriginal peoples.
Evaluation of network RTK in southern Ontario
Saeidi, Amir
Network Real-Time Kinematic (RTK) has become popular in the past decade as an efficient method of precise, real-time positioning. Its relatively low cost and ease-of-use makes it a good candidate to replace static relative Global Positioning System (GPS) in, e.g., land surveying. A lack of previous studies aroused the interest of the Ministry of Transportation of Ontario (MTO) to request York University to complete a comprehensive study of the performance of network RTK in southern Ontario and whether it is a suitable method for MTO control surveying. Extensive fieldwork campaigns in the winter of 2010 and summer of 2011 were carried out and ˜300 hours of static and ˜50 hours of kinematic network RTK data were collected from three different service providers. A set of metrics were defined to characterize the performance of network RTK: availability, time-to-first-fix, precision, accuracy, solution integrity and moving average filtering. The data were used to characterize the horizontal performance of network RTK services and the results along with a set of guidelines and specifications were provided (Saeidi et al., 2011; Bisnath et al., 2012). This thesis presents the horizontal network RTK performance evaluation, as well as the vertical and kinematic performance. The aforementioned metrics are used to evaluate the quality of network RTK in southern Ontario, and to compare to similar services available in other locations. The result have revealed expected ˜2-3 cm (95%) precision for the horizontal and vertical components; however, large horizontal and vertical biases were observed, which can be as high as 4 cm. The solution integrity has shown that typically, 3σ solution uncertainties are larger than the actual errors, unless large biases exist. Moving average filtering has confirmed that due to large outliers and spikes in the solutions, 1 second observation periods are not sufficient to provide a precise solution; larger observation windows should be used, e
Hawking radiation of Kerr-de Sitter black holes using Hamilton-Jacobi method
Ibungochouba Singh, T.; Ablu Meitei, I.; Yugindro Singh, K.
2013-05-01
Hawking radiation of Kerr-de Sitter black hole is investigated using Hamilton-Jacobi method. When the well-behaved Painleve coordinate system and Eddington coordinate are used, we get the correct result of Bekenstein-Hawking entropy before and after radiation but a direct computation will lead to a wrong result via Hamilton-Jacobi method. Our results show that the tunneling probability is related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal but it is consistent with underlying unitary theory.
Pedagogical over Punitive: The Academic Integrity Websites of Ontario Universities
Griffith, Jane
2013-01-01
This study is a snapshot of how Ontario universities are currently promoting academic integrity (AI) online. Rather than concentrating on policies, this paper uses a semiotic methodology to consider how the websites of Ontario's publicly funded universities present AI through language and image. The paper begins by surveying each website and…
Ontario Kindergarten Teachers' Social Media Discussions about Full Day Kindergarten
Lynch, Meghan
2014-01-01
This exploratory netnographic study describes how a sample of Ontario kindergarten teachers perceive the new Ontario Full Day Kindergarten (FDK) curriculum. Discussions from teacher message boards, the comment sections of online news articles, and interviews with kindergarten teachers were analyzed and coded using a qualitative approach. Analysis…
Education Governance Reform in Ontario: Neoliberalism in Context
Sattler, Peggy
2012-01-01
This paper explores the relationship between neoliberal ideology and the discourse and practice of education governance reform in Ontario over the last two decades. It focuses on changes in education governance introduced by successive Ontario governments: the NDP government from 1990 to 1995, the Progressive Conservative government from 1995 to…
Obituary: George Hamilton Bowen Jr. (1925-2009)
Willson, Lee Anne; Struck, Curtis
2011-12-01
Our colleague and collaborator George Hamilton Bowen, Jr., passed away November 1, 2009 in Ames, Iowa. George was born June 20, 1925 in Tulsa, Oklahoma to George and Dorothy (Huntington) Bowen. He married Marjorie Brown June 19, 1948 in Redondo Beach, California; they had five children, with eight grandchildren and five great-grandchildren at the time of his death. George H. Bowen's third or perhaps his fourth career was in astronomy. He was drafted into the navy in 1944, at the end of his first year as a student at Caltech, and ended his war-time service as an electronic technician on the aircraft carrier Shangri-La. He later said "In just nine months, starting from scratch (Ohm's law!), we learned an amazing amount - not by memorization, of course, but by study and real understanding of the basic function of the most advanced AC circuits then being used for instrumentation, measurements, communications, control systems, and much more." He gained a confidence that he could quickly and accurately diagnose and solve technical problems that stood him well in future work. One accomplishment he took particular pride in was figuring out how the radar control used cams and gears to solve the trigonometry for accurate pointing. He also described how the captain was alarmed when weather conditions changed so that refraction no longer showed them distant, small boats around the curvature of Earth. After the war, George Bowen returned to undergraduate and eventually graduate study at Caltech, where he was recruited to the biophysics research group headed by future Nobel Laureate Max Delbrück. George often described his joy in working with these first-rate scientists and finding himself accepted as a part of the effort. He finished his BS with honors in 1949 and his PhD in 1953 with a thesis on "Kinetic Studies on the Mechanism of Photoreactivation of Bacteriophase T2 Inactivated by Ultraviolet Light" involving work with E Coli. This work was supported by grants from the U
Public perceptions of energy issues in Ontario
NONE
2004-11-01
In October 2004, the Environics Research Group conducted a telephone survey of 608 adult Ontarians to collect information on matters regarding energy; consumer confidence and protection; responsibilities of the Ontario Energy Board; and consumer information preferences. This report summarizes the key findings of the survey. According to the survey, the most important electricity and natural gas issue was identified as being price and cost issues, followed by reliability of supply, conservation, keeping utilities publicly owned, finding renewable sources of energy, and over-consumption. The survey revealed that Ontarians show much interest in conserving energy to save money, to protect the environment and ensure future energy supply, but they are generally sceptical that their interests are being protected on electricity and natural gas price issues. At least 9 in 10 Ontarians consider the tasks of the Ontario Energy Board to be important. The majority of Ontarians prefer to receive energy conservation information through the mail and from public regulators over a government department or a company. 10 tabs.
Cancer nursing in Ontario: defining nursing roles.
Fitch, Margaret I; Mings, Deborah
2003-01-01
The delivery of cancer care in Ontario is facing unprecedented challenges. Shortages in nursing, as in all professional disciplines, are having an impact on the delivery of cancer care. Oncology nurses have a major role to play in the delivery of optimum cancer care. Oncology nursing, when adequately defined and supported, can benefit the cancer delivery system, patients, and families. A primary nursing model is seen as being key to the delivery of optimum cancer care. Primary nursing as a philosophy facilitates continuity of care, coordination of a patient's care plan, and a meaningful ongoing relationship with the patient and his/her family. Primary nursing, when delivered in the collaboration of a nurse-physician team, allows for medical resources to be used appropriately. Defined roles enable nurses to manage patients within their scope of practice in collaboration with physicians. Enacting other nursing roles, such as nurse practitioners and advanced practice nurses, can also enable the health care system to manage a broader number of patients with more complex needs. This article presents a position paper originally written as the basis for an advocacy and education initiative in Ontario. It is shared in anticipation that the work may be useful to oncology nurses in other jurisdictions in their efforts to advance oncology nursing and improvement of patient care.
Hamilton Systems of the Compound KdV Equation%组合KdV方程的Hamilton系统
吕书强; 蔡春; 马青华
2014-01-01
In this article, according to Hamilton Systems of the KdV Equation, and proved Hamilton Systems of the Compound KdV Equation.%本文根据KdV方程的Hamilton系统，构造并证明了组合KdV方程的Hamilton系统。
Gharbi, A.; Touloum, S.; Bouda, A.
2015-04-01
We study the Klein-Gordon equation with noncentral and separable potential under the condition of equal scalar and vector potentials and we obtain the corresponding relativistic quantum Hamilton-Jacobi equation. The application of the quantum Hamilton-Jacobi formalism to the double ring-shaped Kratzer potential leads to its relativistic energy spectrum as well as the corresponding eigenfunctions.
Field, J. H.
2011-01-01
It is shown how the time-dependent Schrodinger equation may be simply derived from the dynamical postulate of Feynman's path integral formulation of quantum mechanics and the Hamilton-Jacobi equation of classical mechanics. Schrodinger's own published derivations of quantum wave equations, the first of which was also based on the Hamilton-Jacobi…
Field, J. H.
2011-01-01
It is shown how the time-dependent Schrodinger equation may be simply derived from the dynamical postulate of Feynman's path integral formulation of quantum mechanics and the Hamilton-Jacobi equation of classical mechanics. Schrodinger's own published derivations of quantum wave equations, the first of which was also based on the Hamilton-Jacobi…
Strasser, Roger; Lanphear, Joel
2008-12-01
Northern Ontario, like many rural and remote regions around the world, has a chronic shortage of health professionals. Recognizing that medical graduates who have grown up in rural areas are more likely to practice in rural settings, the Government of Ontario, Canada established a new medical school with a social accountability mandate to contribute to improving the health of the peoples and communities of Northern Ontario. The Northern Ontario School of Medicine (NOSM) is a joint initiative of Laurentian University in Sudbury and Lakehead University in Thunder Bay, cities one thousand kilometers apart. The NOSM model of medical education is built on several recent educational developments including rural-based medical education, social accountability of medical education and electronic distance education. This paper describes these developments as background to presenting the Northern Ontario School of Medicine as a socially accountable, geographically distributed rural-based medical school. NOSM MD PROGRAM: The school actively seeks to recruit students for the MD program from Northern Ontario or similar northern, rural, remote, Aboriginal, and Francophone backgrounds. The holistic, cohesive curriculum is grounded in Northern Ontario and relies heavily on broadband electronic communications to support distributed, community engaged learning. Students, both in classroom and clinical settings, explore cases as if they were physicians in Northern Ontario communities. Clinical education takes place in a wide range of community and health service settings so that students can experience the diversity of communities and cultures in Northern Ontario. Although NOSM is still in the early stages of development, there are encouraging signs that the school's evidence-based model of medical education will be successful in developing a sustainable, community responsive health workforce for Northern Ontario.
Hamilton decompositions of regular expanders: a proof of Kelly's conjecture for large tournaments
Kühn, Daniela
2012-01-01
A long-standing conjecture of Kelly states that every regular tournament on n vertices can be decomposed into (n-1)/2 edge-disjoint Hamilton cycles. We prove this conjecture for large n. In fact, we prove a far more general result, based on our recent concept of robust expansion and a new method for decomposing graphs. We show that every sufficiently large regular digraph G on n vertices whose degree is linear in n and which is a robust outexpander has a decomposition into edge-disjoint Hamilton cycles. This enables us to obtain numerous further results, e.g. as a special case we confirm a conjecture of Erdos on packing Hamilton cycles in random tournaments. As corollaries to the main result, we also obtain several results on packing Hamilton cycles in undirected graphs, giving e.g. the best known result on a conjecture of Nash-Williams. We also apply our result to solve a problem on the domination ratio of the Asymmetric Travelling Salesman problem, which was raised e.g. by Glover and Punnen as well as Alon,...
An optimal L1-minimization algorithm for stationary Hamilton-Jacobi equations
Guermond, Jean-Luc
2009-01-01
We describe an algorithm for solving steady one-dimensional convex-like Hamilton-Jacobi equations using a L1-minimization technique on piecewise linear approximations. For a large class of convex Hamiltonians, the algorithm is proven to be convergent and of optimal complexity whenever the viscosity solution is q-semiconcave. Numerical results are presented to illustrate the performance of the method.
Air Quality in Hamilton: Who Is Concerned? Perceptions from Three Neighbourhoods
Simone, Dylan; Eyles, John; Newbold, K. Bruce; Kitchen, Peter; Williams, Allison
2012-01-01
This study investigates the factors influencing perceptions of air quality in the industrial city of Hamilton, Canada. The research employs data collected via a telephone survey of 1,002 adult residents in three neighbourhoods. Perceptions in the neighbourhoods were examined by individual socio-demographic factors (age, gender, marital and…
LI Wei-hua; LUO En; HUANG Wei-jiang
2007-01-01
According to the basic idea of classical yin-yang complementarity and modem dual-complementarity, in a simple and unified new way proposed by Luo, the unconventional Hamilton-type variational principles for geometrically nonlinear elastodynamics of orthogonal cable-net structures are established systematically, which can fully characterize the initial-boundary-value problem of this kind of dynamics. An important integral relation is made, which can be considered as the generalized principle of virtual work for geometrically nonlinear dynamics of orthogonal cable-net structures in mechanics. Based on such relationship, it is possible not only to obtain the principle of virtual work for geometrically nonlinear dynamics of orthogonal cable-net structures, but also to derive systematically the complementary functionals for five-field, four-field, three-field and two-field unconventional Hamilton-type variational principles, and the functional for the unconventional Hamilton-type variational principle in phase space and the potential energy functional for one-field unconventional Hamilton-type variational principle for geometrically nonlinear elastodynamics of orthogonal cable-net structures by the generalized Legendre transformation given in this paper. Furthermore, the intrinsic relationship among various principles can be explained clearly with this approach.
Octavia Butler and Virginia Hamilton: Black Women Writers and Science Fiction.
Hampton, Gregory Jerome; Brooks, Wanda M.
2003-01-01
Notes that African American literature has always had science fiction elements in its focus on narratives of the alienated and marginalized "other." Contends that Octavia Butler and Virginia Hamilton are two African American writers of science fiction who examine the connections between the stories of a culture and the genre of science…
Excellent reliability of the Hamilton Depression Rating Scale (HDRS-21) in Indonesia after training
Istriana, E.; Kurnia, A.; Weijers, A.; Hidayat, T.; Pinxten, W.J.L.; Jong, C.A.J. de; Schellekens, A.F.A.
2013-01-01
Introduction: The Hamilton Depression Rating Scale (HDRS) is the most widely used depression rating scale worldwide. Reliability of HDRS has been reported mainly from Western countries. The current study tested the reliability of HDRS ratings among psychiatric residents in Indonesia, before and afte
Hamilton-Jacobi equation and the breaking of the WKB approximation
Canfora, F. [Istituto Nazionale di Fisica Nucleare, GC di Salerno (Italy) and Dipartimento di Fisica E.R. Caianiello, Universita di Salerno, Via S. Allende, 84081 Baronissi (Salerno) (Italy)]. E-mail: canfora@sa.infn.it
2005-03-17
A simple method to deal with four-dimensional Hamilton-Jacobi equation for null hypersurfaces is introduced. This method allows to find simple geometrical conditions which give rise to the failure of the WKB approximation on curved spacetimes. The relation between such failure, extreme blackholes and the Cosmic Censor hypothesis is briefly discussed.
And Others; Gilmartin, Harvey
1979-01-01
Presented is a form of Hamilton's principle for classical mechanics appropriate to the study of arbitrary self-sustained vibrations in one dimension. It is applied as an approximate computational tool to the study of several examples of anharmonic oscillation. (Author/GA)
Helping in cooperatively breeding long-tailed tits: a test of Hamilton's rule.
Hatchwell, Ben J; Gullett, Philippa R; Adams, Mark J
2014-05-19
Inclusive fitness theory provides the conceptual framework for our current understanding of social evolution, and empirical studies suggest that kin selection is a critical process in the evolution of animal sociality. A key prediction of inclusive fitness theory is that altruistic behaviour evolves when the costs incurred by an altruist (c) are outweighed by the benefit to the recipient (b), weighted by the relatedness of altruist to recipient (r), i.e. Hamilton's rule rb > c. Despite its central importance in social evolution theory, there have been relatively few empirical tests of Hamilton's rule, and hardly any among cooperatively breeding vertebrates, leading some authors to question its utility. Here, we use data from a long-term study of cooperatively breeding long-tailed tits Aegithalos caudatus to examine whether helping behaviour satisfies Hamilton's condition for the evolution of altruism. We show that helpers are altruistic because they incur survival costs through the provision of alloparental care for offspring. However, they also accrue substantial benefits through increased survival of related breeders and offspring, and despite the low average relatedness of helpers to recipients, these benefits of helping outweigh the costs incurred. We conclude that Hamilton's rule for the evolution of altruistic helping behaviour is satisfied in this species.
Light Rail Transit in Hamilton: Health, Environmental and Economic Impact Analysis
Topalovic, P.; Carter, J.; Topalovic, M.; Krantzberg, G.
2012-01-01
Hamilton's historical roots as an electric, industrial and transportation-oriented city provide it with a high potential for rapid transit, especially when combined with its growing population, developing economy, redeveloping downtown core and its plans for sustainable growth. This paper explores the health, environmental, social and economic…
Two-item discrimination and Hamilton search learning in infant pigtailed macaque monkeys
Ha, J.C.; Mandell, D.J.; Gray, J.
2011-01-01
This study investigated how infant pigtailed macaque monkeys performed on two separate learning assessments, two-object discrimination/reversal and Hamilton search learning. Although the learning tasks have been tested on several species, including non-human primates, there have been no normative
Deformed Hamilton-Jacobi Method in Covariant Quantum Gravity Effective Models
Benrong, Mu; Yang, Haitang
2014-01-01
We first briefly revisit the original Hamilton-Jacobi method and show that the Hamilton-Jacobi equation for the action $I$ of tunnelings of a fermionic particle from a charged black hole can be written in the same form as that of a scalar particle. For the low energy quantum gravity effective models which respect covariance of the curved spacetime, we derive the deformed model-independent KG/Dirac and Hamilton-Jacobi equations using the methods of effective field theory. We then find that, to all orders of the effective theories, the deformed Hamilton-Jacobi equations can be obtained from the original ones by simply replacing the mass of emitted particles $m$ with a parameter $m_{eff}$ that includes all the quantum gravity corrections. Therefore, in this scenario, there will be no corrections to the Hawking temperature of a black hole from the quantum gravity effects if its original Hawking temperature is independent of the mass of emitted particles. As a consequence, our results show that breaking covariance...
Octavia Butler and Virginia Hamilton: Black Women Writers and Science Fiction.
Hampton, Gregory Jerome; Brooks, Wanda M.
2003-01-01
Notes that African American literature has always had science fiction elements in its focus on narratives of the alienated and marginalized "other." Contends that Octavia Butler and Virginia Hamilton are two African American writers of science fiction who examine the connections between the stories of a culture and the genre of science fiction.…
On the convergence rate of operator splitting for Hamilton-Jacobi equations with source terms
Jakobsen, Espen R.; Karlsen, Kenneth H.; Risebro, Nils Henrik
2000-02-01
We establish a rate of convergence for a semi-discrete operator splitting method applied to Hamilton-Jacobi equations with source terms. The method is based on sequentially solving a Hamilton-Jacobi equation and an ordinary differential equation. The Hamilton-Jacobi equation is solved exactly while the ordinary differential equation is solved exactly or by an explicit Euler method. We prove that the L{sup {infinity}} error associated with the operator splitting method is bounded by O({delta}t), where {delta}t is the splitting (or time) step. This error bound is an improvement over the existing O((sqroot)({delta}t)) bound due to Souganidis [40]. In the one dimensional case, we present a fully discrete splitting method based on an unconditionally stable front tracking method for homogenuous Hamilton-Jacobi equations. It is proved that this fully discrete splitting method possesses a linear convergence rate. Moreover, numerical results are presented to illustrate the theoreticle convergence results. (author)
Air Quality in Hamilton: Who Is Concerned? Perceptions from Three Neighbourhoods
Simone, Dylan; Eyles, John; Newbold, K. Bruce; Kitchen, Peter; Williams, Allison
2012-01-01
This study investigates the factors influencing perceptions of air quality in the industrial city of Hamilton, Canada. The research employs data collected via a telephone survey of 1,002 adult residents in three neighbourhoods. Perceptions in the neighbourhoods were examined by individual socio-demographic factors (age, gender, marital and…
Two-item discrimination and Hamilton search learning in infant pigtailed macaque monkeys
Ha, J.C.; Mandell, D.J.; Gray, J.
2011-01-01
This study investigated how infant pigtailed macaque monkeys performed on two separate learning assessments, two-object discrimination/reversal and Hamilton search learning. Although the learning tasks have been tested on several species, including non-human primates, there have been no normative re
Enhanced Preliminary Assessment. Task Order 2. Hamilton Army Airfield, Novato, California
1990-01-01
that Novato and San Rafael will likely continue to be the population centers of the county. 2.4.2 CIUMATE Hamilton Army Airfield is located...Sacramento Reserve Center (2) Modesto Reserve Center (1) San Pablo Reserve Center (2) Concord Reserve Center (4) Santa Rosa Reserve Center (4) A-7 -4 - IEI
Jain, Harish C., Ed.; Carroll, Diane, Ed.
These proceedings contain the addresses and panel and workshop presentations made at the September 1979 Conference on Race and Sex Equality in the Workplace: A Challenge and an Opportunity. (Purpose of the conference was to promote a better understanding of human rights legislation and current equal employment and affirmative action programs and…
The Efficacy of Key Performance Indicators in Ontario Universities as Perceived by Key Informants
Chan, Vivian
2015-01-01
The Ontario Ministry of Education and Training's Task Force on University Accountability first proposed key performance indicators (KPIs) for colleges and universities in Ontario in the early 1990s. The three main KPIs for Ontario universities are the rates of (1) graduation, (2) employment, and (3) Ontario Student Assistance Program loan default.…
Cross currents : hydroelectricity and the engineering of northern Ontario
Manore, J.L. [Calgary Univ., AB (Canada)
1999-05-01
The history of hydroelectric development in northern Ontario was reviewed and analysed with special emphasis on the developments along the Mattagami and Abitibi Rivers. The objective was to examine the important factors that shaped modern hydroelectric development in Canada. System builders, the privately owned Nesbitt Thomson Company, the publicly owned Hydro Electric Power Corporation of Ontario and the eventual evolution of the single power system under Ontario Hydro are chronicled. Broad historical themes such as the technological impacts, regionalism, indigenous rights, plus environmental and economic issues are examined, in addition to an appreciation of the importance of electricity in the manufacturing sector of Ontario, the impact of hydroelectric development on the northern environment and on the northern First Nations, who rely on rivers for their subsistence. Until fairly recently, government policies and interpretations of law often excluded the recognition of Aboriginal uses of river systems, thereby limiting First Nations` peoples ability to practice traditional ways of life. In essence, the book is an account of how the northeastern power system in Ontario shaped the social, political and natural environments and how the development of northeastern power sources by southern power developers shaped the regional interactions between Ontario`s north and south. refs., figs.
Epidemiology of Enterovirus D68 in Ontario.
Adriana Peci
Full Text Available In August 2014, children's hospitals in Kansas City, Missouri and Chicago, Illinois notified the Centers for Disease Control and Prevention (CDC about increased numbers of pediatric patients hospitalized with severe respiratory illness (SRI. In response to CDC reports, Public Health Ontario Laboratories (PHOL launched an investigation of patients being tested for enterovirus D-68 (EV-D68 in Ontario, Canada. The purpose of this investigation was to enhance our understanding of EV-D68 epidemiology and clinical features. Data for this study included specimens submitted for EV-D68 testing at PHOL from September 1, 2014 to October 31, 2014. Comparisons were made between patients who tested positive for the virus (cases and those testing negative (controls. EV-D68 was identified in 153/907 (16.8% of patients tested. In the logistic regression model adjusting for age, sex, setting and time to specimen collection, individuals younger than 20 years of age were more likely to be diagnosed with EV-D68 compared to those 20 and over, with peak positivity at ages 5-9 years. Cases were not more likely to be hospitalized than controls. Cases were more likely to be identified in September than October (OR 8.07; 95% CI 5.15 to 12.64. Routine viral culture and multiplex PCR were inadequate methods to identify EV-D68 due to poor sensitivity and inability to differentiate EV-D68 from other enterovirus serotypes or rhinovirus. Testing for EV-D68 in Ontario from July to December, 2014 detected the presence of EV-D68 virus among young children during September-October, 2014, with most cases detected in September. There was no difference in hospitalization status between cases and controls. In order to better understand the epidemiology of this virus, surveillance for EV-D68 should include testing of symptomatic individuals from all treatment settings and patient age groups, with collection and analysis of comprehensive clinical and epidemiological data.
Epidemiology of Enterovirus D68 in Ontario.
Peci, Adriana; Winter, Anne-Luise; Warshawsky, Bryna; Booth, Tim F; Eshaghi, AliReza; Li, Aimin; Perusini, Stephen; Olsha, Romy; Marchand-Austin, Alex; Kristjanson, Erik; Gubbay, Jonathan B
2015-01-01
In August 2014, children's hospitals in Kansas City, Missouri and Chicago, Illinois notified the Centers for Disease Control and Prevention (CDC) about increased numbers of pediatric patients hospitalized with severe respiratory illness (SRI). In response to CDC reports, Public Health Ontario Laboratories (PHOL) launched an investigation of patients being tested for enterovirus D-68 (EV-D68) in Ontario, Canada. The purpose of this investigation was to enhance our understanding of EV-D68 epidemiology and clinical features. Data for this study included specimens submitted for EV-D68 testing at PHOL from September 1, 2014 to October 31, 2014. Comparisons were made between patients who tested positive for the virus (cases) and those testing negative (controls). EV-D68 was identified in 153/907 (16.8%) of patients tested. In the logistic regression model adjusting for age, sex, setting and time to specimen collection, individuals younger than 20 years of age were more likely to be diagnosed with EV-D68 compared to those 20 and over, with peak positivity at ages 5-9 years. Cases were not more likely to be hospitalized than controls. Cases were more likely to be identified in September than October (OR 8.07; 95% CI 5.15 to 12.64). Routine viral culture and multiplex PCR were inadequate methods to identify EV-D68 due to poor sensitivity and inability to differentiate EV-D68 from other enterovirus serotypes or rhinovirus. Testing for EV-D68 in Ontario from July to December, 2014 detected the presence of EV-D68 virus among young children during September-October, 2014, with most cases detected in September. There was no difference in hospitalization status between cases and controls. In order to better understand the epidemiology of this virus, surveillance for EV-D68 should include testing of symptomatic individuals from all treatment settings and patient age groups, with collection and analysis of comprehensive clinical and epidemiological data.
Feminism and women's health professions in Ontario.
Adams, Tracey L; Bourgeault, Ivy Lynn
2003-01-01
Historically, prevailing gender ideologies were an important element in both the exclusionary strategies employed by male occupational groups and the countervailing responses by female groups. The way in which evolving gender ideologies, and feminism in particular, influence the continuing struggle for greater status and recognition by female professions, however, remains to be fully explored. In this paper, we examine the impact and the role of feminism and feminist ideologies within three female professional projects: nursing, dental hygiene and midwifery in Ontario. We argue that feminism provides an ideology of opposition that enables leaders in these professions to battle against professional inequalities by laying bare the gender inequalities that underlie them. Framing their struggles in feminist terms, female professions also seek recognition for the uniquely female contribution they make to the health care division of labour. At the same time, there exists a tension between ideals of feminism and ideals of professionalism, that has the potential to undermine female professional projects.
Oil heritage district : Lambton County Ontario
Shearer, W. [Wendy Shearer Landscape Architect, Kitchener, ON (Canada)
2009-07-01
This paper discussed a project conducted to assess the cultural heritage values of oil field equipment in Lambton County, Ontario. Oil was discovered in the region in 1858, after which a boom and bust cycle of exploration created a large rural-industrial landscape. The region now contains a unique collection of historic oil equipment. The region's industrial footprint is interwoven with village settlements, agricultural settlements, and a railway and road network linking the region to remote refineries. Oil wells in the region still operate using a jerker line system developed in the early twentieth century. The operational oil wells are subject to fluctuating oil prices and environmental protection requirements. The project presents a rare opportunity to place industrial heritage conservation directly in the hands of business operators and regulators, while also functioning as part of a living community. 2 figs.
Expanding Scope of Practice for Ontario Optometrists
Emily Bray
2017-06-01
Full Text Available In 2011, The Optometry Act, 1991 was amended to include The Designated Drugs and Standards of Practice Regulation which expanded the scope of practice for Ontario optometrists to include prescribing privileges from a specific list of drugs. The goals of the optometry reform were to increase access to care, decrease burden on medical and hospital resources and allow optometrists to practice to their full scope. The policy response was spurred by a recommendation from the Health Professions Regulatory Advisory Council and the prescribing precedence in other Canadian jurisdictions. Bill 171, The Health Systems Improvement Act, amended The Optometry Act, 1991, Section 4 to include the authorized act of prescribing designated drugs, while The Designated Drugs and Standards of Practice, passed on 6 April 2011, listed the individual drugs optometrists are authorized to prescribe. The resulting response of a specific list of authorized drugs was seen as a limiting and inflexible system that will require changes as newer drugs are developed.
Forecasting Ontario's blood supply and demand.
Drackley, Adam; Newbold, K Bruce; Paez, Antonio; Heddle, Nancy
2012-02-01
Given an aging population that requires increased medical care, an increasing number of deferrals from the donor pool, and a growing immigrant population that typically has lower donation rates, the purpose of this article is to forecast Ontario's blood supply and demand. We calculate age- and sex-specific donation and demand rates for blood supply based on 2008 data and project demand between 2008 and 2036 based on these rates and using population data from the Ontario Ministry of Finance. Results indicate that blood demand will outpace supply as early as 2012. For instance, while the total number of donations made by older cohorts is expected to increase in the coming years, the number of red blood cell (RBC) transfusions in the 70+ age group is forecasted grow from approximately 53% of all RBC transfusions in 2008 (209,515) in 2008 to 68% (546,996) by 2036. A series of alternate scenarios, including projections based on a 2% increase in supply per year and increased use of apheresis technology, delays supply shortfalls, but does not eliminate them without active management and/or multiple methods to increase supply and decrease demand. Predictions show that demand for blood products will outpace supply in the near future given current age- and sex-specific supply and demand rates. However, we note that the careful management of the blood supply by Canadian Blood Services, along with new medical techniques and the recruitment of new donors to the system, will remove future concerns. © 2012 American Association of Blood Banks.
Epidemiology of myasthenia gravis in Ontario, Canada.
Breiner, Ari; Widdifield, Jessica; Katzberg, Hans D; Barnett, Carolina; Bril, Vera; Tu, Karen
2016-01-01
Incidence and prevalence estimates in myasthenia gravis have varied widely. Recent studies based on administrative health data have large sample sizes but lack rigorous validation of MG cases, and have not examined the North American population. Our aim was to explore trends in MG incidence and prevalence for the years 1996-2013 in the province of Ontario, Canada (population 13.5 million). We employed a previously validated algorithm to identify MG cases. Linking with census data allowed for the calculation of crude- and age/sex-standardized incidence and prevalence rates for the years 1996-2013. The regional distribution of MG cases throughout the province was examined. Mean age at the first myasthenia gravis encounter was 60.2 ± 17.1 years. In 2013, there were 3611 prevalent cases in Ontario, and the crude prevalence rate was 32.0/100,000 population. Age- and sex-standardized prevalence rates rose consistently over time from 16.3/100,000 (15.4-17.1) in 1996 to 26.3/100,000 (25.4-27.3) in 2013. Standardized incidence rates remained stable between 1996 (2.7/100,000; 95% CL 2.3-3.0) and 2013 (2.3/100,000; 2.1-2.6). Incidence was highest in younger women and older men, and geographic variation was evident throughout the province. In conclusion, this large epidemiological study shows rising myasthenia gravis prevalence with stable incidence over time, which is likely reflective of patients living longer, possibly due to improved disease treatment. Our findings provide accurate information on the Canadian epidemiology of myasthenia gravis and burden for health care resources planning for the province, respectively.
Swenson, Sarah A
2015-02-01
W.D. Hamilton's theory of inclusive fitness aimed to define the evolved limits of altruism with mathematical precision. Although it was meant to apply universally, it has been almost irretrievably entwined with the particular case of social insects that featured in his famous 1964 papers. The assumption that social insects were central to Hamilton's early work contradicts material in his rich personal archive. In fact, careful study of Hamilton's notes, letters, diaries, and early essays indicates the extent to which he had humans in mind when he decided altruism was a topic worthy of biological inquiry. For this reason, this article reconsiders the role of extra-scientific factors in Hamilton's early theorizing. In doing so, it offers an alternative perspective as to why Hamilton saw self-sacrifice to be an important subject. Although the traditional narrative prioritizes his distaste for benefit-of-the-species explanations as a motivating factor behind his foundational work, I argue that greater attention ought to be given to Hamilton's hope that science could be used to address social ills. By reconsidering the meaning Hamilton intended inclusive fitness to have, we see that while he was no political ideologue, the socio-political relevance of his theory was nevertheless integral to its development.
Forming ideas about health: a qualitative study of Ontario adolescents
Michaelson, Valerie; McKerron, Margaret; Davison, Colleen
2015-01-01
... seeking out the information for a particular purpose. In this Ontario-based qualitative study, grounded theory methods were used to explore ways that health knowledge is obtained in adolescents (age 10-16...
2001 USACE LRE Topobathy Lidar: Lake Ontario (NY)
National Oceanic and Atmospheric Administration, Department of Commerce — NOAA Office for Coastal Management received the 2001 Lake Ontario dataset with 2 separate metadata records in 2013 on a hard-drive device from the USGS Center for...
Lake Ontario Tributaries: 2009-2010 Field Data Report
In 2002, EPA began a program to regularly monitor U.S. tributaries to Lake Ontario for the critical pollutants. This report provides program results from 2009-2010, and identifies changes in the monitoring program from prior years.
Waterfowl breeding pair survey: Ontario, Quebec, and New York: 1997
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for Ontario, Quebec, and New York during 1997. The primary purpose of the survey is to...
Western and Central Ontario: Waterfowl breeding population survey: 2000
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for Western and Central Ontario during 2000. The primary purpose of the survey is to...
A checklist of the 67 mosquito species of Ontario, Canada.
Giordano, Bryan V; Gasparotto, Alessio; Hunter, Fiona F
2015-03-01
We provide an updated checklist of 67 endemic mosquito species known from Ontario, Canada. Nine endemic species are added to the checklist found in Darsie and Ward (2005) : Aedes cantator, Ae. churchillensis, Ae. nigripes, Ae. pullatus, Anopheles perplexens, An. crucians, An. smaragdinus, Culex erraticus, and Cx. salinarius. Only 4 specimens of Ae. albopictus have been recorded in Ontario since 2001 despite concerted efforts to find this species; therefore, it is considered an "accidental" species and is excluded from the checklist.
Yang, Shu-Zheng; Feng, Zhong-Wen; Li, Hui-Ling
2017-02-01
We derive the Hamilton-Jacobi equation from the Dirac equation, then, with the help of the Hamilton-Jacobi equation, the the tunneling radiation behavior of the non-stationary spherical symmetry de Sitter black hole is discussed, at last, we obtained the tunneling rate and Hawking temperature. Our results showed that the Hamilton-Jacobi equation is a fundamental dynamic equation, it can widely be derived from the dynamic equations which describe the particles with any spin. Therefore, people can easy calculate the tunneling behavior from the black holes.
A Practical Approach to the Hamilton-Jacobi Formulation of Holographic Renormalization
Elvang, Henriette
2016-01-01
We revisit the subject of holographic renormalization for asymptotically AdS spacetimes. For many applications of holography, one has to handle the divergences associated with the on-shell gravitational action. The brute force approach uses the Fefferman-Graham (FG) expansion near the AdS boundary to identify the divergences, but subsequent reversal of the expansion is needed to construct the infinite counterterms. While in principle straightforward, the method is cumbersome and application/reversal of FG is formally unsatisfactory. Various authors have proposed an alternative method based on the Hamilton-Jacobi equation. However, this approach may appear to be abstract, difficult to implement, and in some cases limited in applicability. In this paper, we clarify the Hamilton-Jacobi formulation of holographic renormalization and present a simple algorithm for its implementation to extract cleanly the infinite counterterms. While the derivation of the method relies on the Hamiltonian formulation of general rel...
Generalisations of Hamilton's Rule Applied to Non-Additive Public Goods Games with Random Group Size
James A R Marshall
2014-07-01
Full Text Available Inclusive fitness theory has been described as being limited to certain special cases of social evolution. In particular some authors argue that the theory can only be applied to social interactions having additive fitness effects, and involving only pairs of individuals. This article takes an elegant formulation of non-additive public goods games from the literature, and shows how the two main generalisations of Hamilton's rule can be applied to such games when group sizes are random. In doing so inclusive fitness theory is thus applied to a very general class of social dilemmas, thereby providing further evidence for its generality. Interestingly, one of the two predominant versions of Hamilton's rule is found to be mathematically easier to apply to the scenario considered, despite both necessarily giving equivalent predictions.
Fleck, Marcelo Pio de Almeida; Chaves, Márcia Lorena Fagundes; Poirier-Littré, Marie France; Bourdel, Marie Chantal; Loo, Henri; Guelfi, Julien Daniel
2004-02-01
Among various research strategies for depression, the cross-cultural approach is a useful tool to investigate depressive disorders. The Hamilton Rating Scale for Depression was applied to 130 depressed inpatients in France and Brazil. Items were factorized by principal component analysis with Varimax rotation using the Kaiser or simulation method for factor sorting. Three factors were obtained in France, and four in Brazil. The first factor includes the core symptoms of depression in both samples. Qualitative and quantitative differences appeared in the anxiety factor between Brazilian and French samples. Insomnia items appeared as another factor for both groups. A limitation of this study is that it was conducted with small inpatient samples. Principal component analysis of the Hamilton Rating Scale for Depression for depressive inpatients in these two countries showed a similar structure. Differences observed were in the way anxiety items were distributed.
图的谱半径和Hamilton性%Spectral radius and Hamiltonicity of a graph
朱五华
2011-01-01
从图G的闭包理论角度去研究图的Hamilton性。利用图的补图谱半径的界，讨论了Hamilton图存在的谱条件，证明了n阶图G，如果它的补图的谱半径小于或等于（n-3）的算术平方根，则G是Hamilton图。%The Hamihonicity is studied from the closure theory of a graph G. We discuss some spectral conditions for the existence of Hamilton graph by using bounds of spectral radius of the Complement of a graph, and show that if G is a graph of order n with spectral radius of its complement is less than or equal to the arithmetic square root of （ n - 3） , then G is a Hamilton graph.
The Wasserstein geometry of nonlinear σ models and the Hamilton-Perelman Ricci flow
Carfora, Mauro
Nonlinear sigma models are quantum field theories describing, in the large deviation sense, random fluctuations of harmonic maps between a Riemann surface and a Riemannian manifold. Via their formal renormalization group analysis, they provide a framework for possible generalizations of the Hamilton-Perelman Ricci flow. By exploiting the heat kernel embedding introduced by Gigli and Mantegazza, we show that the Wasserstein geometry of the space of probability measures over Riemannian metric measure spaces provides a natural setting for discussing the relation between nonlinear sigma models and Ricci flow theory. In particular, we analyze the embedding of Ricci flow into a heat kernel renormalization group flow for dilatonic nonlinear sigma models, and characterize a non-trivial generalization of the Hamilton-Perelman version of the Ricci flow. We discuss in detail the monotonicity and gradient flow properties of this extended flow.
Computational method for the quantum Hamilton-Jacobi equation: bound states in one dimension.
Chou, Chia-Chun; Wyatt, Robert E
2006-11-07
An accurate computational method for the one-dimensional quantum Hamilton-Jacobi equation is presented. The Mobius propagation scheme, which can accurately pass through singularities, is used to numerically integrate the quantum Hamilton-Jacobi equation for the quantum momentum function. Bound state wave functions are then synthesized from the phase integral using the antithetic cancellation technique. Through this procedure, not only the quantum momentum functions but also the wave functions are accurately obtained. This computational approach is demonstrated through two solvable examples: the harmonic oscillator and the Morse potential. The excellent agreement between the computational and the exact analytical results shows that the method proposed here may be useful for solving similar quantum mechanical problems.
Relations between low-lying quantum wave functions and solutions of the Hamilton-Jacobi equation
Friedberg, R; Zhao Wei Qin
1999-01-01
We discuss a new relation between the low lying Schroedinger wave function of a particle in a one-dimentional potential V and the solution of the corresponding Hamilton-Jacobi equation with -V as its potential. The function V is $\\geq 0$, and can have several minina (V=0). We assume the problem to be characterized by a small anhamornicity parameter $g^{-1}$ and a much smaller quantum tunneling parameter $\\epsilon$ between these different minima. Expanding either the wave function or its energy as a formal double power series in $g^{-1}$ and $\\epsilon$, we show how the coefficients of $g^{-m}\\epsilon^n$ in such an expansion can be expressed in terms of definite integrals, with leading order term determined by the classical solution of the Hamilton-Jacobi equation. A detailed analysis is given for the particular example of quartic potential $V={1/2}g^2(x^2-a^2)^2$.
Superluminal Neutrinos and a Curious Phenomenon in the Relativistic Quantum Hamilton-Jacobi Equation
Matone, Marco
2011-01-01
OPERA's results, if confirmed, pose the question of superluminal neutrinos. We investigate the kinematics defined by the quantum version of the relativistic Hamilton-Jacobi equation, i.e. E^2=p^2c^2+m^2c^4+2mQc^2, with Q the quantum potential of the free particle. The key point is that the quantum version of the Hamilton-Jacobi equation is a third-order differential equation, so that it has integration constants which are missing in the Schr\\"odinger and Klein-Gordon equations. In particular, a non-vanishing imaginary part of an integration constant leads to a quantum correction to the expression of the velocity which is curiously in agreement with OPERA's results.
Conformal invariance, Noether symmetry, Lie symmetry and conserved quantities of Hamilton systems
Chen Rong; Xu Xue-Jun
2012-01-01
In this paper,the relation of the conformal invariance,the Noether symmetry,and the Lie symmetry for the Hamilton system is discussed in detail. The definition of the conformal invariance for Hamilton systems is given.The relation between the conformal invariance and the Noether symmetry is discussed,the conformal factors of the determining expressions are found by using the Noether symmetry,and the Noether conserved quantity resulted from the conformal invariance is obtained.The relation between the conformal invariance and the Lie symmetry is discussed,the conformal factors are found by using the Lie symmetry,and the Hojman conserved quantity resulted from the conformal invariance of the system is obtained.Two examples are given to illustrate the application of the results.
Deriving the Hamilton equations of motion for a nonconservative system using a variational principle
Tveter, Frank Thomas
1998-03-01
The classical derivation of the canonical transformation theory [H. Goldstein, Classical Mechanics, 2nd ed. (Addison-Wesley, Reading, 1981)] is based on Hamilton's principle which is only valid for conservative systems. This paper avoids this principle by using an approach that is basically reversed compared to the classical derivation. The Lagrange equations of motion are formulated in the undefined and general variable set {Q,P}, and the general Hamilton equations of motion are derived from the Lagrange equations by using a variational principle. The undefined general variables {Q,P} are defined through a transformation to a special (defined) variable set {q,p}. The transformation equations connecting the two sets are derived by using the invariants property of the value of the Lagrangian. This approach results in a more general interpretation of the generator function.
Woodward, Graham L; Iverson, Alex; Harvey, Rebecca; Blake, Peter G
2015-01-01
In 2009, Ontario's Ministry of Health and Long-Term Care initiated the transfer of oversight and coordination of chronic kidney disease (CKD) care to the Ontario Renal Network (ORN) under the auspices of Cancer Care Ontario (CCO). The aim was to replicate the quality improvement and change management practices used for cancer control within CKD. Much of the ORN's first three years were dedicated to building the infrastructure necessary to bridge the gap between provincial policy and clinical practice. This article explores the accomplishments, challenges and lessons learned over that period. The results, which are applicable to the management of chronic diseases in Ontario, Canada, and internationally, confirm that sustainable change takes time and requires strong leadership, transparency, accountability and communication, supported by a solid foundation of data and evidence.
Large time behavior of weakly coupled systems of first-order Hamilton-Jacobi equations
Camilli, Fabio; Loreti, Paola; Nguyen, Vinh Duc
2011-01-01
We show a large time behavior result for class of weakly coupled systems of first-order Hamilton-Jacobi equations in the periodic setting. We use a PDE approach to extend the convergence result proved by Namah and Roquejoffre (1999) in the scalar case. Our proof is based on new comparison, existence and regularity results for systems. An interpretation of the solution of the system in terms of an optimal control problem with switching is given.
Bound States and Band Structure - a Unified Treatment through the Quantum Hamilton - Jacobi Approach
Ranjani, S S; Panigrahi, P K
2005-01-01
We analyze the Scarf potential, which exhibits both discrete energy bound states and energy bands, through the quantum Hamilton-Jacobi approach. The singularity structure and the boundary conditions in the above approach, naturally isolate the bound and periodic states, once the problem is mapped to the zero energy sector of another quasi-exactly solvable quantum problem. The energy eigenvalues are obtained without having to solve for the corresponding eigenfunctions explicitly. We also demonstrate how to find the eigenfunctions through this method.
Perturbation to Unified Symmetry and Adiabatic Invariants for Relativistic Hamilton Systems
ZHANG Ming-Jiang; FANG Jian-Hui; LU Kai; PANG Ting; LIN Peng
2009-01-01
Based on the concept of adiabatic invariant, the perturbation to unified symmetry and adiabatic invariants for relativistic Hamilton systems are studied. The definition of the perturbation to unified symmetry for the system is presented, and the criterion of the perturbation to unified symmetry is given. Meanwhile, the Noether adiabatic invariants, the generalized Hojman adiabatic invariants, and the Mei adiabatic invariants for the perturbed system are obtained.
WANG Yu-Sheng; ZHANG Xiao-Ni; YUAN Bao-He; FANG Jian-Hui; YANG Guo-Hong; LIN Peng; PANG Ting
2008-01-01
Based on the concept of higher-order adiabatic invariants of mechanical system with action of a small perturbation, the perturbation to Lie symmetry and generalized Hojman adiabatic invariants for the relativistic Hamilton system are studied. Perturbation to Lie symmetry is discussed under general infinitesimal transformation of groups in which time is variable. The form and the criterion of generalized Hojman adiabatic invariants for this system are obtained. Finally, an example is given to illustrate the results.
A Discontinuous Galerkin Finite Element Method for Hamilton-Jacobi Equations
Hu, Changqing; Shu, Chi-Wang
1998-01-01
In this paper, we present a discontinuous Galerkin finite element method for solving the nonlinear Hamilton-Jacobi equations. This method is based on the Runge-Kutta discontinuous Galerkin finite element method for solving conservation laws. The method has the flexibility of treating complicated geometry by using arbitrary triangulation, can achieve high order accuracy with a local, compact stencil, and are suited for efficient parallel implementation. One and two dimensional numerical examples are given to illustrate the capability of the method.
A Large Deviation, Hamilton-Jacobi Equation Approach to a Statistical Theory for Turbulence
2012-09-03
and its associated compressible Euler equations, Comptes Rendus Mathematique , (09 2011): 973. doi: 10.1016/j.crma.2011.08.013 2012/09/03 14:17:15 6...Hamilton-Jacobi PDE is shown to be well-posed. (joint work with T Nguyen, Journal de Mathematique Pures et Appliquees). Future works focusing on large time behavior for such equations is currently under its way. Technology Transfer
Hamilton dynamics for the Lefschetz thimble integration akin to the complex Langevin method
Fukushima, Kenji
2015-01-01
The Lefschetz thimble method, i.e., the integration along the steepest descent cycles, is an idea to evade the sign problem by complexifying the theory. We discuss that such steepest descent cycles can be identified as ground-state wave-functions of a supersymmetric Hamilton dynamics, which is described with a framework akin to the complex Langevin method. We numerically construct the wave-functions on a grid using a toy model and confirm their well-localized behavior.
Grajevskaja, Viktorija
2017-01-01
Danio rerio (Hamilton, 1822) is a powerful vertebrate model system, which provides a unique combination of advantages that are important for an investigation of cardiovascular development and regeneration. However, conditional mutagenesis, which is essential for dissecting a role of developmental genes in regeneration, has not been demonstrated in the adult zebrafish. This remains a main disadvantage of D. rerio model system. The main aim of this research project was to use insertional ge...
On the Hamilton-Jacobi-Bellman Equation by the Homotopy Perturbation Method
Abdon Atangana
2014-01-01
Full Text Available Our concern in this paper is to use the homotopy decomposition method to solve the Hamilton-Jacobi-Bellman equation (HJB. The approach is obviously extremely well organized and is an influential procedure in obtaining the solutions of the equations. We portrayed particular compensations that this technique has over the prevailing approaches. We presented that the complexity of the homotopy decomposition method is of order O(n. Furthermore, three explanatory examples established good outcomes and comparisons with exact solution.
Fu Jing-Li; Chen Li-Qun; Chen Xian-Wei
2006-01-01
This paper investigates the momentum-dependent symmetries for nonholonomic nonconservative Hamilton canonical systems. The definition and determining equations of the momentum-dependent symmetries are presented, based on the invariance of differential equations under infinitesimal transformations with respect to the generalized coordinates and generalized momentums. The structure equation and the non-Noether conserved quantities of the systems are obtained. The inverse issues associated with the momentum-dependent symmetries are discussed. Finally, an example is discussed to further illustrate the applications.
Quality legislation: lessons for Ontario from abroad.
Veillard, Jérémy; Tipper, Brenda; Klazinga, Niek
2012-01-01
While the Excellent Care for All Act, 2010 (ECFA Act) provides a comprehensive approach to stimulating quality improvement in healthcare, there are other examples of legislations articulating strategies aimed at the same goal but proposing different approaches. This paper reviews quality of care legislations in the Netherlands, the United States, England and Australia, compares those pieces of legislation with the ECFA Act and suggests lessons for Ontario in planning the next stages of its healthcare quality strategy. Notable among the commonalities that the EFCA Act shares with the selected examples of legislation are mandatory reporting of performance results at an organizational level and furthering quality improvement, evidence generation and performance monitoring. However, the EFCA Act does not include any elements of restructuring or competition, unlike some of the other examples. Key to successful transformation of the Ontario healthcare system will be to propose a package of changes that will deal systematically with all aspects of transformation sought (including structural changes, payments systems and elements of competition), will garner support from all the actors, and will be implemented consistently and persistently. Benchmarking on the implementation and impact of reforms with the countries presented in this paper may be an additional important step. Quality of care is a key focus of health system reforms, and in recent years many countries in the Organisation of Economic Co-operation and Development (OECD), including Canada, have developed strategies aimed at improving healthcare quality and patient safety (OECD 2010). Øvretveit and Klazinga propose that national strategies for quality of care can be targeted at different types of health system stakeholders: professionals, healthcare organizations, medical products and technologies, patients and financers (World Health Organization Regional Office for Europe 2008). The generic elements of these
Adaptive dynamics via Hamilton-Jacobi approach and entropy methods for a juvenile-adult model.
Carrillo, José Antonio; Cuadrado, Sílvia; Perthame, Benoît
2007-01-01
We consider a nonlinear system describing a juvenile-adult population undergoing small mutations. We analyze two aspects: from a mathematical point of view, we use an entropy method to prove that the population neither goes extinct nor blows-up; from an adaptive evolution point of view, we consider small mutations on a long time scale and study how a monomorphic or a dimorphic initial population evolves towards an Evolutionarily Stable State. Our method relies on an asymptotic analysis based on a constrained Hamilton-Jacobi equation. It allows to recover earlier predictions in Calsina and Cuadrado [A. Calsina, S. Cuadrado, Small mutation rate and evolutionarily stable strategies in infinite dimensional adaptive dynamics, J. Math. Biol. 48 (2004) 135; A. Calsina, S. Cuadrado, Stationary solutions of a selection mutation model: the pure mutation case, Math. Mod. Meth. Appl. Sci. 15(7) (2005) 1091.] that we also assert by direct numerical simulation. One of the interests here is to show that the Hamilton-Jacobi approach initiated in Diekmann et al. [O. Diekmann, P.-E. Jabin, S. Mischler, B. Perthame, The dynamics of adaptation: an illuminating example and a Hamilton-Jacobi approach, Theor. Popul. Biol. 67(4) (2005) 257.] extends to populations described by systems.
Chou, Chia-Chun
2014-03-14
The complex quantum Hamilton-Jacobi equation-Bohmian trajectories (CQHJE-BT) method is introduced as a synthetic trajectory method for integrating the complex quantum Hamilton-Jacobi equation for the complex action function by propagating an ensemble of real-valued correlated Bohmian trajectories. Substituting the wave function expressed in exponential form in terms of the complex action into the time-dependent Schrödinger equation yields the complex quantum Hamilton-Jacobi equation. We transform this equation into the arbitrary Lagrangian-Eulerian version with the grid velocity matching the flow velocity of the probability fluid. The resulting equation describing the rate of change in the complex action transported along Bohmian trajectories is simultaneously integrated with the guidance equation for Bohmian trajectories, and the time-dependent wave function is readily synthesized. The spatial derivatives of the complex action required for the integration scheme are obtained by solving one moving least squares matrix equation. In addition, the method is applied to the photodissociation of NOCl. The photodissociation dynamics of NOCl can be accurately described by propagating a small ensemble of trajectories. This study demonstrates that the CQHJE-BT method combines the considerable advantages of both the real and the complex quantum trajectory methods previously developed for wave packet dynamics.
Schmid, L. A.
1977-01-01
The first and second variations are calculated for the irreducible form of Hamilton's Principle that involves the minimum number of dependent variables necessary to describe the kinetmatics and thermodynamics of inviscid, compressible, baroclinic flow in a specified gravitational field. The form of the second variation shows that, in the neighborhood of a stationary point that corresponds to physically stable flow, the action integral is a complex saddle surface in parameter space. There exists a form of Hamilton's Principle for which a direct solution of a flow problem is possible. This second form is related to the first by a Friedrichs transformation of the thermodynamic variables. This introduces an extra dependent variable, but the first and second variations are shown to have direct physical significance, namely they are equal to the free energy of fluctuations about the equilibrium flow that satisfies the equations of motion. If this equilibrium flow is physically stable, and if a very weak second order integral constraint on the correlation between the fluctuations of otherwise independent variables is satisfied, then the second variation of the action integral for this free energy form of Hamilton's Principle is positive-definite, so the action integral is a minimum, and can serve as the basis for a direct trail and error solution. The second order integral constraint states that the unavailable energy must be maximum at equilibrium, i.e. the fluctuations must be so correlated as to produce a second order decrease in the total unavailable energy.
程晓良; 徐渊辑; 孟炳泉
2005-01-01
An algorithm for numerical solution of discrete Hamilton-Jacobi-Bellman equations is proposed.The method begins with a suitable initial guess value of the solution,then finds a suitable matrix to linearize the system and constructs an iteration algorithm to generate the monotone sequence.The convergence of the algorithm for nonlinear discrete Hamilton-Jacobi-Bellman equations is proved.Some numerical examples are presented to confirm the effciency of this algorithm.
Ghosh, Esha; Rangan, C Pandu
2011-01-01
Hamiltonicity is an important property in parallel and distributed computation. Existence of Hamiltonian cycle allows efficient emulation of distributed algorithms on a network wherever such algorithm exists for linear-array and ring, and can ensure deadlock freedom in some routing algorithms in hierarchical interconnection networks. Hamiltonicity can also be used for construction of independent spanning tree and leads to designing fault tolerant protocols. Optical Transpose Interconnection Systems or OTIS (also referred to as two-level swapped network) is a widely studied interconnection network topology which is popular due to high degree of scalability, regularity, modularity and package ability. Surprisingly, to our knowledge, only one strong result is known regarding Hamiltonicity of OTIS - showing that OTIS graph built of Hamiltonian base graphs are Hamiltonian. In this work we consider Hamiltonicity of OTIS networks, built on Non-Hamiltonian base and answer some important questions. First, we prove tha...
Market Myths and Facts - the Ontario Context
Dorey, S.
2007-07-01
The world has learned much about electricity markets and what they can and can't do over the past few years, but some myths persist. Why they persist is a subject for those who study politics, interests and influence. This paper provides a perspective on myths which have affected the reliable and economic delivery of electricity to customers, particularly with respect to transmission. Hydro One effectively provides the transmission network for the Province of Ontario, Canada. As Hydro One is a wires company, the paper is not intended to address the issues which affect the generation or conservation sectors of the industry, except where they directly relate to the wires. The proposition of this paper is that electricity transmission is best treated as an essential public good. Transmission as a market participant and a traded commodity has generally not worked with respect to assuring that the system continues to be developed to meet the basic need of customers for reliable and affordable electricity. (auth)
Canadian wind energy case studies : Toronto, Ontario
NONE
2004-01-01
In 1999, the North Toronto Green Community created the Toronto Renewable Energy Co-operative (TREC) to work on the development of a wind turbine for the city of Toronto. By December 2002, a 750 KW turbine from Lagerwey BV in the Netherlands was installed along the shore of Lake Ontario. It represents one of the most innovative wind power projects, and the first urban wind turbine in North America. WindShare, a separate cooperative created by TREC owns and manages the Exhibition Place Turbine. Power was first generated in January 2003 with an annual output of 1.4 million kWh, the equivalent of reducing 1,400 tonnes of greenhouse gases annually. The total investment was about $1.7 million, with both the planning phase and operational phase of the project bringing in local economic benefits. Wind energy addresses public concerns over the environmental impacts of conventional electricity production. Wind is a renewable energy source that does not contribute to climate change, air and water pollution. In an average year, a 660 KW turbine can produce 2,000 MWh of electricity, enough to power 250 homes. Public support has been very positive for the Exhibition Place wind turbine, which is now a main tourist attraction. Interest in this project has prompted the creation of twelve new community co-ops province-wide. 1 fig.
Oxygen-isotope variations in post-glacial Lake Ontario
Hladyniuk, Ryan; Longstaffe, Fred J.
2016-02-01
The role of glacial meltwater input to the Atlantic Ocean in triggering the Younger Dryas (YD) cooling event has been the subject of controversy in recent literature. Lake Ontario is ideally situated to test for possible meltwater passage from upstream glacial lakes and the Laurentide Ice Sheet (LIS) to the Atlantic Ocean via the lower Great Lakes. Here, we use the oxygen-isotope compositions of ostracode valves and clam shells from three Lake Ontario sediment cores to identify glacial meltwater contributions to ancient Lake Ontario since the retreat of the LIS (∼16,500 cal [13,300 14C] BP). Differences in mineralogy and sediment grain size are also used to identify changes in the hydrologic regime. The average lakewater δ18O of -17.5‰ (determined from ostracode compositions) indicates a significant contribution from glacial meltwater. Upon LIS retreat from the St. Lawrence lowlands, ancient Lake Ontario (glacial Lake Iroquois) lakewater δ18O increased to -12‰ largely because of the loss of low-18O glacial meltwater input. A subsequent decrease in lakewater δ18O (from -12 to -14‰), accompanied by a median sediment grain size increase to 9 μm, indicates that post-glacial Lake Ontario received a final pulse of meltwater (∼13,000-12,500 cal [11,100-10,500 14C] BP) before the onset of hydrologic closure. This meltwater pulse, which is also recorded in a previously reported brief freshening of the neighbouring Champlain Valley (Cronin et al., 2012), may have contributed to a weakening of thermohaline circulation in the Atlantic Ocean. After 12,900 cal [11,020 14C] BP, the meltwater presence in the Ontario basin continued to inhibit entry of Champlain seawater into early Lake Ontario. Opening of the North Bay outlet diverted upper Great Lakes water from the lower Great Lakes causing a period (12,300-8300 cal [10,400-7500 14C] BP) of hydrologic closure in Lake Ontario (Anderson and Lewis, 2012). This change is demarcated by a shift to higher δ18Olakewater
Ontario tackles US and domestic air pollution sources
Anon
2001-06-01
The province of Ontario is taking strong action to reduce emission from major domestic sources, focusing on smog and climate change-causing emissions. For example, the province has introduced strict air emission limits and mandatory monitoring and reporting, placed a freeze on the sale of coal-fired generating plants by Ontario Hydro, and implemented new air quality initiatives to ensure that all Ontarians have early and improved access to air quality information. Ontario is also developing stringent emission caps, announced an expansion of mandatory emission reporting requirements to all industrial sectors, and introduced fines and long jail sentences for major environmental offences. In an effort to deal with transboundary environmental issues, Ontario recently intervened before US courts in support of the US Environmental Protection Agency's (EPA) efforts to cap emissions of nitrogen oxides from midwestern states. This action recognizes that smog and acid rain are regional issues that must be tackled through regional efforts, and draws attention to the fact that more than half of Ontario's smog comes from sources south of the border.
Transboundary pollution and its effect on Ontario : fact sheet
NONE
2000-08-24
The Ontario Ministry of the Environment (MOE) has taken action to improve air quality in the province. Some measures include strict air emission limits and mandatory reporting requirements for the electric power generating sector. A freeze has been placed on the sale of all coal-fired generating plants pending environmental review. The Ontario Government pressured the Federal Government to reduce the sulphur content of gasoline and diesel fuel produced in Canada. This report stated that while it is recognized that half of Ontario's air pollution is caused by emissions from the U.S., the province considers smog and acid rain to be regional air issues that should be addressed using coordinated bilateral efforts. Ontario will commit to adopting the standards of the U.S. Environmental Protection Agency if these standards will cap emissions of nitrogen oxides. This report presented a summary of simple facts regarding emissions of sulphur dioxide, nitrogen oxides, acid rain, as well as nuclear and fossil fueled power generation. The MOE has created several environmental programs such as the Anti-Smog Action Plan, Drive Clean Program, Smog Patrol, Partners in Air Program and the Climate Change Fund. It has also taken other initiatives such as the implementation of emission performance standards for power generation, updating air quality standards and investing $4 million into an air monitoring network. The ministry has offered resource materials for smog alert and has updated Ontario's gasoline volatility regulation. 1 tab., 3 figs.
Bathymetry and absorbitivity of Titan's Ontario Lacus
Hayes, A.G.; Wolf, A.S.; Aharonson, O.; Zebker, H.; Lorenz, R.; Kirk, R.L.; Paillou, P.; Lunine, J.; Wye, L.; Callahan, P.; Wall, S.; Elachi, C.
2010-01-01
Ontario Lacus is the largest and best characterized lake in Titan's south polar region. In June and July 2009, the Cassini RADAR acquired its first Synthetic Aperture Radar (SAR) images of the area. Together with closest approach altimetry acquired in December 2008, these observations provide a unique opportunity to study the lake's nearshore bathymetry and complex refractive properties. Average radar backscatter is observed to decrease exponentially with distance from the local shoreline. This behavior is consistent with attenuation through a deepening layer of liquid and, if local topography is known, can be used to derive absorptive dielectric properties. Accordingly, we estimate nearshore topography from a radar altimetry profile that intersects the shoreline on the East and West sides of the lake. We then analyze SAR backscatter in these regions to determine the imaginary component of the liquid's complex index of refraction (Kappa). The derived value, Kappa = (6.1-1.3+1.7) x 10-4, corresponds to a loss tangent of tan Delta = (9.2-2.0+2.5) x 10-4 and is consistent with a composition dominated by liquid hydrocarbons. This value can be used to test compositional models once the microwave optical properties of candidate materials have been measured. In areas that do not intersect altimetry profiles, relative slopes can be calculated assuming the index of refraction is constant throughout the liquid. Accordingly, we construct a coarse bathymetry map for the nearshore region by measuring bathymetric slopes for eleven additional areas around the lake. These slopes vary by a factor of ~5 and correlate well with observed shoreline morphologies.
Huge court fight may be in offing as Ontario college considers penalty for maverick MD.
Gray, C
1999-03-23
Physicians who practise alternative medicine are paying close attention to the case of an Ontario physician who was found guilty of professional misconduct. The College of Physicians and Surgeons of Ontario says it is simply doing its job.
Neurotoxic behavioral effects of Lake Ontario salmon diets in rats
Hertzler, D.R. (State Univ. of New York, Oswego (USA))
1990-03-01
Six experiments were conducted to examine possible neurotoxic effects of the exposure to contaminants in Lake Ontario salmon administered through the diets of rats. Rats were fed different concentrations of fish (8%, 15% or 30%) in one of three diet conditions: Lake Ontario salmon, Pacific Ocean salmon, or laboratory rat chow only. Following 20 days on the diets, rats were tested for five minutes per day in a modified open field for one or three days. Lake Ontario salmon diets consistently produced significantly lower activity, rearing, and nosepoke behaviors in comparison with ocean salmon or rat chow diet conditions. A dose-response effect for concentration of lake salmon was obtained, and the attenuation effect occurred in males, females, adult or young animals, and postweaning females, with fish sampled over a five-year period. While only two of several potential contaminants were tested, both fish and brain analyses of mirex and PCBs relate to the behavioral effects.
Standards for provision and accreditation of echocardiography in Ontario.
Sanfilippo, Anthony J; Chan, Kwan L; Hughes, William G; Kingsbury, Kori J; Leong-Poi, Howard; Sasson, Zion; Wald, Robert
2013-03-01
In March of 2010, the Ontario Ministry of Health and Long-term Care and Ontario Medical Association jointly commissioned a Working Group to make recommendations regarding the provision and accreditation of echocardiographic services in Ontario. That commission undertook a process to examine all aspects of the provision, reporting and interpretation of echocardiographic examinations, including the echocardiographic examination itself, facilities, equipment, reporting, indications, and qualifications of personnel involved in the acquisition and interpretation of studies. The result was development of a set of 54 performance standards and a process for accreditation of echocardiographic facilities, initially on a voluntary basis, but leading to a process of mandatory accreditation. This article, and its accompanying Supplemental Material, outline the mandate, process undertaken, standards developed, and accreditation process recommended.
Parental perceptions of school-based influenza immunisation in Ontario, Canada: a qualitative study
MacDougall, Donna; Crowe, Lois; Jennifer A Pereira; Kwong, Jeffrey C.; Quach, Susan; Wormsbecker, Anne E; Ramsay, Hilary; Salvadori, Marina I; Russell, Margaret L; ,
2014-01-01
Objective To understand the perspectives of Ontario parents regarding the advantages and disadvantages of adding influenza immunisation to the currently existing Ontario school-based immunisation programmes. Design Descriptive qualitative study. Participants Parents of school-age children in Ontario, Canada, who were recruited using a variety of electronic strategies (social media, emails and media releases), and identified as eligible (Ontario resident, parent of one or more school-age child...
The short-term impact of Ontario's generic pricing reforms.
Michael R Law
Full Text Available BACKGROUND: Canadians pay amongst the highest generic drug prices in the world. In July 2010, the province of Ontario enacted a policy that halved reimbursement for generic drugs from the public drug plan, and substantially lowered prices for private purchases. We quantified the impact of this policy on overall generic drug expenditures in the province, and projected the impact in other provinces had they mimicked this pricing change. METHODS: We used quarterly prescription generic drug dispensing data from the IMS-Brogan CompuScript Audit. We used the price per unit in both the pre- and post-policy period and two economics price indexes to estimate the expenditure reduction in Ontario. Further, we used the post-policy Ontario prices to estimate the potential reduction in other provinces. RESULTS: We estimate that total expenditure on generic drugs in Ontario during the second half of 2010 was between $181 and $194 million below what would be expected if prices had remained at pre-policy level. Over half of the reduction in spending was due to savings on just 10 generic ingredients. If other provinces had matched Ontario's prices, their expenditures over during the latter half of 2010 would have been $445 million lower. DISCUSSION: We found that if Ontario's pricing scheme were adopted nationally, overall spending on generic drugs in Canada would drop at least $1.28 billion annually--a 5% decrease in total prescription drug expenditure. Other provinces should seriously consider both changes to their generic drug prices and the use of more competitive bulk purchasing policies.
Future changes of temperature and heat waves in Ontario, Canada
Li, Zhong; Huang, Guohe; Huang, Wendy; Lin, Qianguo; Liao, Renfei; Fan, Yurui
2017-05-01
Apparent changes in the temperature patterns in recent years brought many challenges to the province of Ontario, Canada. As the need for adapting to climate change challenges increases, the development of reliable climate projections becomes a crucial task. In this study, a regional climate modeling system, Providing Regional Climates for Impacts Studies (PRECIS), is used to simulate the temperature patterns in Ontario. Three PRECIS runs with a resolution of 25 km × 25 km are carried out to simulate the present (1961-1990) temperature variations. There is a good match between the simulated and observed data, which validates the performance of PRECIS in reproducing temperature changes in Ontario. Future changes of daily maximum, mean, and minimum temperatures during the period 2071-2100 are then projected under the IPCC SRES A2 and B2 emission scenarios using PRECIS. Spatial variations of annual mean temperature, mean diurnal range, and temperature seasonality are generated. Furthermore, heat waves defined based on the exceedance of local climatology and their temporal and spatial characteristics are analyzed. The results indicate that the highest temperature and the most intensive heat waves are most likely to occur at the Toronto-Windsor corridor in Southern Ontario. The Northern Ontario, in spite of the relatively low projected temperature, would be under the risk of long-lasting heat waves, and thus needs effective measures to enhance its climate resilience in the future. This study can assist the decision makers in better understanding the future temperature changes in Ontario and provide decision support for mitigating heat-related loss.
Viscosity solutions of two classes of coupled Hamilton-Jacobi-Bellman equations
Başar Tamer
2001-01-01
Full Text Available This paper studies viscosity solutions of two sets of linearly coupled Hamilton-Jacobi-Bellman (HJB equations (one for finite horizon and the other one for infinite horizon which arise in the optimal control of nonlinear piecewise deterministic systems where the controls could be unbounded. The controls enter through the system dynamics as well as the transitions for the underlying Markov chain process, and are allowed to depend on both the continuous state and the current state of the Markov chain. The paper establishes the existence and uniqueness of viscosity solutions for these two sets of HJB equations, whose Hamiltonian structures are different from the standard ones.
基于DNA计算的Hamilton图%Hamilton Graph Based on DNA Computing
张家秀
2004-01-01
DNA computing is a novel method for solving a class of intractable computational problem,in which the computing can grow exponentially with problem size.Up to now,many accomplishments have been achieved to improve its performance and increase its reliability.Hamilton Graph Problem has been solved by means of molecular biology techniques.A small graph was encoded in molecules of DNA,and the "operations" of the computation were performed with standard protocols and enzymes.This work represents further evidence for the ability of DNA computing to solve NP-complete search problems.
MODERNOS Y MILITANTES. California a través de Harwell Hamilton Harris y Gordon Drake
PARRA MARTINEZ, JOSE
2013-01-01
A través del establecimiento de una genealogía moderna que recorre tres generaciones de arquitectos californianos entre mediados de los años 20 y finales de los años 40, desde Richard Neutra a Gordon Drake pasando por Harwell Hamilton Harris, esta tesis aborda el modo en que estos autores entendieron y expresaron su particular vinculación con el medio físico y el paisaje creativo del Sur de California. El análisis de las obras donde estos arquitectos coincidieron en su condición de discípulos...
Hamilton formalism and Noether symmetry for mechanico-electrical systems with fractional derivatives
Zhang Shi-Hua; Chen Ben-Yong; Fu Jing-Li
2012-01-01
This paper presents extensions to the traditional calculus of variations for mechanico-electrical systems containing fractional derivatives.The Euler-Lagrange equations and the Hamilton formalism of the mechanico-electrical systems with fractional derivatives are established.The definition and the criteria for the fractional generalized Noether quasisymmetry are presented. Furthermore,the fractional Noether theorem and conseved quantities of the systems are obtained by virtue of the invariance of the Hamiltonian action under the infinitesimal transformations.An example is presented to illustrate the application of the results.
Scalar particles emission from black holes with topological defects using Hamilton-Jacobi method
Jusufi, Kimet
2015-01-01
We study quantum tunneling of charged and uncharged scalar particles from the event horizon of Schwarzschild-de Sitter and Reissner-Nordstr\\"{o}m-de Sitter black holes pierced by an infinitely long spinning cosmic string and a global monopole. In order to find the Hawking temperature and the tunneling probability we solve the Klein-Gordon equation by using the Hamilton-Jacobi method and WKB approximation. We show that Hawking temperature is independent of the presence of topological defects in both cases.
On the Connection between the Hamilton-Jacobi-Bellman and the Fokker-Planck Control Frameworks
Annunziato, Mario
2014-09-01
In the framework of stochastic processes, the connection between the dynamic programming scheme given by the Hamilton-Jacobi-Bellman equation and a recently proposed control approach based on the Fokker-Planck equation is discussed. Under appropriate assumptions it is shown that the two strategies are equivalent in the case of expected cost functionals, while the FokkerPlanck formalism allows considering a larger class of objectives. To illustrate the connection between the two control strategies, the cases of an Itō stochastic process and of a piecewise-deterministic process are considered.
Park, Chandeok
This dissertation presents a general methodology for solving the optimal feedback control problem in the context of Hamiltonian system theory. It is first formulated as a two point boundary value problem for a standard Hamiltonian system, and the associated phase flow is viewed as a canonical transformation. Then relying on the Hamilton-Jacobi theory, we employ generating functions to develop a unified methodology for solving a variety of optimal feedback control formulations with general types of boundary conditions. The major accomplishment is to establish a theoretical connection between the optimal cost function and a special kind of generating function. Guided by this recognition, we are ultimately led to a new flexible representation of the optimal feedback control law for a given system, which is adjustable to various types of boundary conditions by algebraic conversions and partial differentiations. This adaptive property provides a substantial advantage over the classical dynamic programming method in the sense that we do not need to solve the Hamilton-Jacobi-Bellman equation repetitively for varying types of boundary conditions. Furthermore for a special type of boundary condition, it also enables us to work around an inherent singularity of the Hamilton-Jacobi-Bellman equation by a special algebraic transformation. Taking full advantage of these theoretical insights, we develop a systematic algorithm for solving a class of optimal feedback control problems represented by smooth analytic Hamiltonians, and apply it to problems with different characteristics. Then, broadening the practical utility of generating functions for problems where the relevant Hamiltonian is non-smooth, we construct a pair of Cauchy problems from the associated Hamilton-Jacobi equations. This alternative formulation is justified by solving problems with control constraints which usually feature non-smoothness in the control logic. The main result of this research establishes that
On a Hamilton-Poisson Approach of the Maxwell-Bloch Equations with a Control
Lăzureanu, Cristian
2017-09-01
In this paper we consider the 3D real-valued Maxwell-Bloch equations with a parametric control given by \\dot {x}=y+az+byz,\\dot {y}=xz,\\dot {z}=-xy (a,b\\in \\mathbb {R}). We give two Lie-Poisson structures of this system that are related with well-known Lie algebras. Moreover, we construct infinitely many Hamilton-Poisson realizations of this system. We also analyze the stability of the equilibrium points, as well as the existence of periodic orbits. In addition, we emphasize some connections between the energy-Casimir mapping of the considered system and the above-mentioned dynamical elements.
Scalar particles emission from black holes with topological defects using Hamilton-Jacobi method
Jusufi, Kimet
2015-11-01
We study quantum tunneling of charged and uncharged scalar particles from the event horizon of Schwarzschild-de Sitter and Reissner-Nordström-de Sitter black holes pierced by an infinitely long spinning cosmic string and a global monopole. In order to find the Hawking temperature and the tunneling probability we solve the Klein-Gordon equation by using the Hamilton-Jacobi method and WKB approximation. We show that Hawking temperature is independent of the presence of topological defects in both cases.
Coordinates Used in Derivation of Hawking Radiation via Hamilton-Jacobi Method
Liu, Bo; He, Xiaokai; Liu, Wenbiao
2009-05-01
Coordinates used in derivation of Hawking radiation via Hamilton-Jacobi method are investigated more deeply. In the case of a 4-dimensional Schwarzschild black hole, a direct computation leads to a wrong result. In the meantime, making use of the isotropic coordinate or invariant radial distance, we can get the correct conclusion. More coordinates including Painleve and Eddington-Finkelstein are tried to calculate the semi-classical Hawking emission rate. The reason of the discrepancy between naive coordinate and well-behaved coordinates is also discussed.
Fast methods for the Eikonal and related Hamilton- Jacobi equations on unstructured meshes.
Sethian, J A; Vladimirsky, A
2000-05-23
The Fast Marching Method is a numerical algorithm for solving the Eikonal equation on a rectangular orthogonal mesh in O(M log M) steps, where M is the total number of grid points. The scheme relies on an upwind finite difference approximation to the gradient and a resulting causality relationship that lends itself to a Dijkstra-like programming approach. In this paper, we discuss several extensions to this technique, including higher order versions on unstructured meshes in Rn and on manifolds and connections to more general static Hamilton-Jacobi equations.
Algebra and Geometry of Hamilton's Quaternions: 'Well, Papa, Can You Multiply Triplets?'
2016-06-01
Inspired by the relation between the algebra ofcomplex numbers and plane geometry, WilliamRowan Hamilton sought an algebra of triples forapplication to three-dimensional geometry. Unableto multiply and divide triples, he inventeda non-commutative division algebra of quadruples,in what he considered his most significantwork, generalizing the real and complex numbersystems. We give a motivated introduction toquaternions and discuss how they are related toPauli matrices, rotations in three dimensions, thethree sphere, the group SU(2) and the celebratedHopf fibrations.
Hamilton-Jacobi equation, heteroclinic chains and Arnol'd diffusion in three time scales systems
Gallavotti, G; Mastropietro, V; Gallavotti, Giovanni; Gentile, Guido; Mastropietro, Vieri
1998-01-01
Interacting systems consisting of two rotators and a point mass near a hyperbolic fixed point are considered, in a case in which the uncoupled systems have three very different characteristic time scales. The abundance of quasi periodic motions in phase space is studied via the Hamilton-Jacobi equation. The main result, a high density theorem of invariant tori, is derived by the classical canonical transformation method extending previous results. As an application the existence of long heteroclinic chains (and of Arnol'd diffusion) is proved for systems interacting through a trigonometric polynomial in the angle variables.
NONE
2002-07-01
A wide range of issues relevant to the petroleum industry in both Ontario and northern New York state were addressed with particular reference to the potential for hydrocarbon plays in the shale and carbonate rocks of the region. The 21 presentations and poster sessions discussed a variety of topics including the sedimentology and petrology of oil and natural gas reservoirs, with emphasis on their depositional histories and geological correlations. This included a review of sequence stratigraphy, source rocks, and hydrodynamics of hydrocarbon fluid flow in fractured reservoirs. Many of the papers reviewed exploration methods, market economics, and enhanced recovery techniques such as well stimulation and horizontal drilling. Several presentations also reviewed the recent advances that have been made in remote sensing techniques, ground truth measurement acquisition, and seismic surveys. Eight of the 21 presentations were processed separately for inclusion in the database. refs., tabs., figs.
Brock, Allison; Ryan, Thomas G.
2016-01-01
The following integrative literature review illuminates the perceptible time gap that currently exists for new Ontario teachers graduating and moving from teacher preparation programs to permanent members of the Ontario teaching community. At a time of oversupply of teachers, many new teachers within Ontario and beyond its borders become…
The Price of Restraint. Brief to the Ontario Council on University Affairs.
Council of Ontario Universities, Toronto. Committee on Operating Grants.
The Council of Ontario Universities' 1978 brief on operating support is presented. Section I compares funding recommendations for 1978-79 put forward by the Council on Ontario Universities (COU) and the Ontario Council on University Affairs (OCUS) with the provisions made for that year by the Minister of College and Universities (MCU). Section 2…
The Financial Position of Universities in Ontario: 1986. Report 86-2.
Council of Ontario Universities, Toronto. Research Div.
Data on the financial position of Ontario's universities are provided. Statistical tables and graphs cover: expenditures per client served, 1977-1985; percentage increase in provincial operating grants and total budgetary expenditures, 1977-1986; Ontario Universities' share of provincial budgetary expenditures; growth of Ontario Gross Domestic…
Sianos, Helen
2015-01-01
In 2013 the Ontario Ministry of Training, Colleges and Universities released Ontario's Differentiation Policy Framework for Postsecondary Education, for colleges and universities in the province. All 24 Ontario colleges responded to this Framework by presenting their Strategic Mandate Agreements (SMA). The Framework contrasts the original…
77 FR 30451 - Safety Zone; Olcott Fireworks, Lake Ontario, Olcott, NY
2012-05-23
... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Olcott Fireworks, Lake Ontario, Olcott, NY... establish a temporary safety zone on Lake Ontario, Olcott, NY. This proposed rule is intended to restrict vessels from a portion of Lake Ontario during the Olcott fireworks display. The safety zone established...
The Ontario Curriculum in the Arts and the Creative Economy Agenda
D'Andrea, Marisol
2012-01-01
The rhetoric of the creative economy agenda has influenced the revised Ontario curriculum in the arts for grades 9-12. Yet, increasing rhetorical and substantive support for a creative economy agenda in Ontario at large is not sufficiently reflected in the revised Ontario arts curriculum. The expanded agenda is not matched by expanded substantive…
77 FR 38492 - Safety Zone; Olcott Fireworks, Lake Ontario, Olcott, NY
2012-06-28
... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Olcott Fireworks, Lake Ontario, Olcott, NY... temporary safety zone on Lake Ontario, Olcott, New York. This safety zone is intended to restrict vessels from a portion of Lake Ontario during the Olcott fireworks on July 3, 2012. The safety zone...
Dey, Bijoy K; Janicki, Marek R; Ayers, Paul W
2004-10-08
Classical dynamics can be described with Newton's equation of motion or, totally equivalently, using the Hamilton-Jacobi equation. Here, the possibility of using the Hamilton-Jacobi equation to describe chemical reaction dynamics is explored. This requires an efficient computational approach for constructing the physically and chemically relevant solutions to the Hamilton-Jacobi equation; here we solve Hamilton-Jacobi equations on a Cartesian grid using Sethian's fast marching method. Using this method, we can--starting from an arbitrary initial conformation--find reaction paths that minimize the action or the time. The method is demonstrated by computing the mechanism for two different systems: a model system with four different stationary configurations and the H+H(2)-->H(2)+H reaction. Least-time paths (termed brachistochrones in classical mechanics) seem to be a suitable chioce for the reaction coordinate, allowing one to determine the key intermediates and final product of a chemical reaction. For conservative systems the Hamilton-Jacobi equation does not depend on the time, so this approach may be useful for simulating systems where important motions occur on a variety of different time scales.
A practical approach to the Hamilton-Jacobi formulation of holographic renormalization
Elvang, Henriette; Hadjiantonis, Marios
2016-06-01
We revisit the subject of holographic renormalization for asymptotically AdS spacetimes. For many applications of holography, one has to handle the divergences associated with the on-shell gravitational action. The brute force approach uses the Fefferman- Graham (FG) expansion near the AdS boundary to identify the divergences, but subsequent reversal of the expansion is needed to construct the infinite counterterms. While in principle straightforward, the method is cumbersome and application/reversal of FG is formally unsatisfactory. Various authors have proposed an alternative method based on the Hamilton-Jacobi equation. However, this approach may appear to be abstract, difficult to implement, and in some cases limited in applicability. In this paper, we clarify the Hamilton-Jacobi formulation of holographic renormalization and present a simple algorithm for its implementation to extract cleanly the infinite counterterms. While the derivation of the method relies on the Hamiltonian formulation of general relativity, the actual application of our algorithm does not. The work applies to any D-dimensional holographic dual with asymptotic AdS boundary, Euclidean or Lorentzian, and arbitrary slicing. We illustrate the method in several examples, including the FGPW model, a holographic model of 3d ABJM theory, and cases with marginal scalars such as a dilaton-axion system.
From classical Lagrangians to Hamilton operators in the Standard-Model Extension
Schreck, Marco
2016-01-01
In this article we investigate whether a theory based on a classical Lagrangian for the minimal Standard-Model Extension (SME) can be quantized such that the result is equal to the corresponding low-energy Hamilton operator obtained from the field-theory description. This analysis is carried out for the whole collection of minimal Lagrangians found in the literature. The upshot is that first quantization can be performed consistently. The unexpected observation is made that at first order in Lorentz violation and at second order in the velocity the Lagrangians are related to the Hamilton functions by a simple transformation. Under mild assumptions, it is shown that this holds universally. This result is used successfully to obtain classical Lagrangians for two complicated sectors of the minimal SME that have not been considered in the literature so far. Therefore, it will not be an obstacle anymore to derive such Lagrangians even for involved sets of coefficients - at least to the level of approximation state...
HERMITE WENO SCHEMES WITH LAX-WENDROFF TYPE TIME DISCRETIZATIONS FOR HAMILTON-JACOBI EQUATIONS
Jianxian Qiu
2007-01-01
In this paper, we use Hermite weighted essentially non-oscillatory (HWENO) schemes with a Lax-Wendroff time discretization procedure, termed HWENO-LW schemes, to solve Hamilton-Jacobi equations. The idea of the reconstruction in the HWENO schemes comes from the original WENO schemes, however both the function and its first derivative values are evolved in time and are used in the reconstruction. One major advantage of HWENO schemes is its compactness in the reconstruction. We explore the possibility in avoiding the nonlinear weights for part of the procedure, hence reducing the cost but still maintaining non-oscillatory properties for problems with strong discontinuous derivative. As a result,comparing with HWENO with Runge-Kutta time discretizations schemes (HWENO-RK) of Qiu and Shu [19] for Hamilton-Jacobi equations, the major advantages of HWENO-LW schemes are their saving of computational cost and their compactness in the reconstruction.Extensive numerical experiments are performed to illustrate the capability of the method.
A practical approach to the Hamilton-Jacobi formulation of holographic renormalization
Elvang, Henriette; Hadjiantonis, Marios [Department of Physics and Michigan Center for Theoretical Physics, University of Michigan,450 Church Str., Ann Arbor MI 48109 (United States)
2016-06-08
We revisit the subject of holographic renormalization for asymptotically AdS spacetimes. For many applications of holography, one has to handle the divergences associated with the on-shell gravitational action. The brute force approach uses the Fefferman-Graham (FG) expansion near the AdS boundary to identify the divergences, but subsequent reversal of the expansion is needed to construct the infinite counterterms. While in principle straightforward, the method is cumbersome and application/reversal of FG is formally unsatisfactory. Various authors have proposed an alternative method based on the Hamilton-Jacobi equation. However, this approach may appear to be abstract, difficult to implement, and in some cases limited in applicability. In this paper, we clarify the Hamilton-Jacobi formulation of holographic renormalization and present a simple algorithm for its implementation to extract cleanly the infinite counterterms. While the derivation of the method relies on the Hamiltonian formulation of general relativity, the actual application of our algorithm does not. The work applies to any D-dimensional holographic dual with asymptotic AdS boundary, Euclidean or Lorentzian, and arbitrary slicing. We illustrate the method in several examples, including the FGPW model, a holographic model of 3d ABJM theory, and cases with marginal scalars such as a dilaton-axion system.
From classical Lagrangians to Hamilton operators in the standard model extension
Schreck, M.
2016-07-01
In this article we investigate whether a theory based on a classical Lagrangian for the minimal Standard Model Extension (SME) can be quantized such that the result is equal to the corresponding low-energy Hamilton operator obtained from the field-theory description. This analysis is carried out for the whole collection of minimal Lagrangians found in the literature. The upshot is that the first quantization can be performed consistently. The unexpected observation is made that at first order in Lorentz violation and at second order in the velocity, the Lagrangians are related to the Hamilton functions by a simple transformation. Under mild assumptions, it is shown that this holds universally. That result is used successfully to obtain classical Lagrangians for two complicated sectors of the minimal SME that have not been considered in the literature so far. Therefore, it will not be an obstacle anymore to derive such Lagrangians even for involved sets of coefficients—at least to the level of approximation stated above.
Omitted Costs, Inflated Benefits: Renewable Energy Policy in Ontario
Gallant, Parker; Fox, Glenn
2011-01-01
The government of Ontario has adopted wind energy development as an alternative energy source. It enacted the Green Energy and Economy Act, May 2009, with the intention to fast track the approval process regarding industrial wind turbines. The Act legislated a centralized decision making process while removing local jurisdictional authority.…
Shared Geospatial Metadata Repository for Ontario University Libraries: Collaborative Approaches
Forward, Erin; Leahey, Amber; Trimble, Leanne
2015-01-01
Successfully providing access to special collections of digital geospatial data in academic libraries relies upon complete and accurate metadata. Creating and maintaining metadata using specialized standards is a formidable challenge for libraries. The Ontario Council of University Libraries' Scholars GeoPortal project, which created a shared…
Constructing Bullying in Ontario, Canada: A Critical Policy Analysis
Winton, Sue; Tuters, Stephanie
2015-01-01
As the prevalence and negative effects of bullying become widely known, people around the world seem desperate to solve the bullying "problem". A sizeable body of research about many aspects of bullying and a plethora of anti-bullying programmes and policies now exist. This critical policy analysis asks: how does Ontario, Canada's…
Ontario District Embraces an Evolving Approach to Learning
Belchetz, Denese; Witherow, Kathy
2014-01-01
The York Region District School Board is recognized as a high-performing district in Ontario, Canada, and has also garnered international attention. Visitors from across Canada, as well as Singapore, Finland, England, Scotland, Holland, the Bahamas, Korea, China, and Taiwan, have come to learn about its system and observe the teaching, learning,…
Financial Literacy in Ontario: Neoliberalism, Pierre Bourdieu and the Citizen
Arthur, Chris
2011-01-01
Utilizing concepts from Pierre Bourdieu I argue that the implementation of financial literacy education in Ontario public schools will, if uncontested, support a neoliberal consumer habitus (subjectivity) at the expense of the critical citizen. This internalization of the neoliberal ethos assists state efforts to shift responsibility for…
Prevalence of Problematic Video Gaming among Ontario Adolescents
Turner, Nigel E.; Paglia-Boak, Angela; Ballon, Bruce; Cheung, Joyce T. W.; Adlaf, Edward M.; Henderson, Joanna; Chan, Vincy; Rehm, Jurgen; Hamilton, Hayley; Mann, Robert E.
2012-01-01
Video game playing has become a very popular activity among adolescents. Its impact on the mental health and well-being of players is just beginning to be explored. This paper reports on the prevalence of problematic gaming in a representative sample of 2,832 Ontario students in grades 7 to 12. The survey included questions about the school grade,…
Revisiting Constructivist Teaching Methods in Ontario Colleges Preparing for Accreditation
Schultz, Rachel A.
2015-01-01
At the time of writing, the first community colleges in Ontario were preparing for transition to an accreditation model from an audit system. This paper revisits constructivist literature, arguing that a more pragmatic definition of constructivism effectively blends positivist and interactionist philosophies to achieve both student centred…
Tidy Minds, Untidy Solutions: University Organization in Ontario.
Smith, J. Percy
1984-01-01
The Ontario Council of University Affairs was established to counsel the provincial government concerning higher education and to act as a buffer between institutions and government. However, with no statutory authority, its advice has been largely ignored or rejected. A 1983 commission to rectify the situation has not succeeded. (MSE)
Administrators' Views on Teacher Evaluation: Examining Ontario's Teacher Performance Appraisal
Maharaj, Sachin
2014-01-01
This study examines the views of administrators (i.e., principals and vice-principals) in Ontario, Canada, with regard to the province's Teacher Performance Appraisal process. A total of 178 responses were collected from a survey that examined five areas: 1) preparation and training; 2) classroom observations; 3) preparing the formal evaluation;…
Implications of Key Performance Indicator Issues in Ontario Universities Explored
Chan, Vivian
2015-01-01
Since 1998, the Ministry of Training, Colleges and Universities in Ontario, Canada, has required that data on specific key performance indicators (KPIs) be made public by its publicly funded universities. The information is intended to be used by universities to demonstrate their achievements, to improve their programmes and services, and to…
Constructing Bullying in Ontario, Canada: A Critical Policy Analysis
Winton, Sue; Tuters, Stephanie
2015-01-01
As the prevalence and negative effects of bullying become widely known, people around the world seem desperate to solve the bullying "problem". A sizeable body of research about many aspects of bullying and a plethora of anti-bullying programmes and policies now exist. This critical policy analysis asks: how does Ontario, Canada's…
Institutional Diversity in Ontario's University Sector: A Policy Debate Analysis
Piché, Pierre G.; Jones, Glen A.
2016-01-01
In order to meet the demands in a cost-effective manner of an emerging knowledge society that is global in scope, structural higher education policy changes have been introduced in many countries with a focus on systemic and programmatic diversity. There has been an ongoing debate about institutional diversity in Ontario higher education,…
Omitted Costs, Inflated Benefits: Renewable Energy Policy in Ontario
Gallant, Parker; Fox, Glenn
2011-01-01
The government of Ontario has adopted wind energy development as an alternative energy source. It enacted the Green Energy and Economy Act, May 2009, with the intention to fast track the approval process regarding industrial wind turbines. The Act legislated a centralized decision making process while removing local jurisdictional authority.…
Provoking Dialogue: A Short History of Outdoor Education in Ontario
Borland, James
2011-01-01
History helps educators more clearly describe the role of outdoor education in improving society by fostering awareness of human-nature interconnections. Five branches have shaped outdoor education in Ontario: (1) agricultural education; (2) environmental education; (3) outdoor adventure education; (4) ecological education; and (5) climate change…
How Ontario Spread Successful Practices across 5,000 Schools
Glaze, Avis
2013-01-01
Ontario embraced a provincial lead improvement plan that was designed to improve its 5,000 schools by focusing on literacy and numeracy, improving high school graduation, and improving public support for education. Its primary strategy was developing networks of educators and building their capacity for growth.
Lake Ontario: Nearshore Conditions and Variability in Water Quality Parameters
Interest in recent years has increased regarding conditions in the nearshore of the Great Lakes. We conducted a high-resolution survey of the Lake Ontario nearshore along the 20 m contour using towed electronic instrumentation. The 720 km survey was conducted September 6-10, 20...
Constructing Bullying in Ontario, Canada: A Critical Policy Analysis
Winton, Sue; Tuters, Stephanie
2015-01-01
As the prevalence and negative effects of bullying become widely known, people around the world seem desperate to solve the bullying "problem". A sizeable body of research about many aspects of bullying and a plethora of anti-bullying programmes and policies now exist. This critical policy analysis asks: how does Ontario, Canada's…
Financial Literacy in Ontario: Neoliberalism, Pierre Bourdieu and the Citizen
Arthur, Chris
2011-01-01
Utilizing concepts from Pierre Bourdieu I argue that the implementation of financial literacy education in Ontario public schools will, if uncontested, support a neoliberal consumer habitus (subjectivity) at the expense of the critical citizen. This internalization of the neoliberal ethos assists state efforts to shift responsibility for…
Okasha, S; Martens, J
2016-03-01
Hamilton's original work on inclusive fitness theory assumed additivity of costs and benefits. Recently, it has been argued that an exact version of Hamilton's rule for the spread of a pro-social allele (rb > c) holds under nonadditive pay-offs, so long as the cost and benefit terms are defined as partial regression coefficients rather than pay-off parameters. This article examines whether one of the key components of Hamilton's original theory can be preserved when the rule is generalized to the nonadditive case in this way, namely that evolved organisms will behave as if trying to maximize their inclusive fitness in social encounters. © 2015 European Society For Evolutionary Biology. Journal of Evolutionary Biology © 2015 European Society For Evolutionary Biology.
Reliable positioning in a sparse GPS network, eastern Ontario
Samadi Alinia, H.; Tiampo, K.; Atkinson, G. M.
2013-12-01
Canada hosts two regions that are prone to large earthquakes: western British Columbia, and the St. Lawrence River region in eastern Canada. Although eastern Ontario is not as seismically active as other areas of eastern Canada, such as the Charlevoix/Ottawa Valley seismic zone, it experiences ongoing moderate seismicity. In historic times, potentially damaging events have occurred in New York State (Attica, 1929, M=5.7; Plattsburg, 2002, M=5.0), north-central Ontario (Temiskaming, 1935, M=6.2; North Bay, 2000, M=5.0), eastern Ontario (Cornwall, 1944, M=5.8), Georgian Bay (2005, MN=4.3), and western Quebec (Val-Des-Bois,2010, M=5.0, MN=5.8). In eastern Canada, the analysis of detailed, high-precision measurements of surface deformation is a key component in our efforts to better characterize the associated seismic hazard. The data from precise, continuous GPS stations is necessary to adequately characterize surface velocities from which patterns and rates of stress accumulation on faults can be estimated (Mazzotti and Adams, 2005; Mazzotti et al., 2005). Monitoring of these displacements requires employing high accuracy GPS positioning techniques. Detailed strain measurements can determine whether the regional strain everywhere is commensurate with a large event occurring every few hundred years anywhere within this general area or whether large earthquakes are limited to specific areas (Adams and Halchuck, 2003; Mazzotti and Adams, 2005). In many parts of southeastern Ontario and western Québec, GPS stations are distributed quite sparsely, with spacings of approximately 100 km or more. The challenge is to provide accurate solutions for these sparse networks with an approach that is capable of achieving high-accuracy positioning. Here, various reduction techniques are applied to a sparse network installed with the Southern Ontario Seismic Network in eastern Ontario. Recent developments include the implementation of precise point positioning processing on acquired
A population on the rise: The origin of deepwater sculpin in Lake Ontario
Welsh, Amy B.; Scribner, Kim T.; Stott, Wendylee; Walsh, Maureen
2017-01-01
Deepwater sculpin, Myoxocephalus thompsonii, were thought to have been extirpated from Lake Ontario. However, in recent years, abundance has increased and recruitment has been documented. There are two hypotheses concerning the origin of the current Lake Ontario deepwater sculpin population. First, individuals from the upper Great Lakes may have recolonized Lake Ontario. Alternatively, the Lake Ontario population may have not been extirpated, and the remnant population has recovered naturally. To test these hypotheses, eight microsatellite loci were used to analyze samples from the current Lake Ontario population, museum specimens from the historic Lake Ontario population, and current upper Great Lakes populations. The genetic data suggest that historically throughout the Great Lakes, deepwater sculpin exhibited low levels of spatial genetic structure. Approximate Bayesian Computation analyses support the hypothesis that the current Lake Ontario population is more closely related to populations in the upper Great Lakes than to the historic Lake Ontario samples, indicating that the current Lake Ontario population likely resulted from recolonization from the Upper Great Lakes. The current Lake Ontario population has reduced allelic diversity relative to upper Great Lakes populations, indicating a possible founder effect. This study demonstrates the role life history variation can play in recolonization success. The pelagic larval phase of the deepwater sculpin allowed recolonization of Lake Ontario via passive larval drift.
Clinical guidelines and the fate of medical autonomy in Ontario.
Rappolt, S G
1997-04-01
Conceptually, clinical guidelines and professional autonomy have a paradoxical relationship. Despite being the quintessence of medical knowledge at the corporate level, guidelines diminish the clinical autonomy of individual practitioners, and therefore threaten medicine's justification for its autonomy. Theorists have argued that professional autonomy will be retained through elite dominance of practitioners, while comparative research suggests that economic autonomy can be traded off to retain clinical autonomy. Under government pressure to regulate the growth of Ontario physicians' fee-for-service public expenditure, the profession's representative organization, the Ontario Medical Association (OMA), promoted voluntary clinical guidelines, hoping to both constrain costs and preserve professional control over the content of medical care. The OMA collaborated with the Ministry of Health in developing guidelines and establishing a provincial centre for health service research. Ontario's practitioners disregarded the OMA's exhortations to implement clinical guidelines, suggesting that in the absence of external constraints, practitioners can subvert elite dominance. However, practitioners' unchecked clinical and economic autonomy, combined with evidence of wide provincial variations in medical care, served to legitimize the government's increasingly unilateral control over the schedule of insured medical services, and, in 1993, their imposition of a global cap on physicians' fee-for-service income pool. When analysed in the context of ongoing Ministry-OMA relations, the failure of the OMA's guidelines strategy to constrain medical service costs has expedited an overall decline in medical autonomy in Ontario. The emergence and course of Ontario's clinical guidelines movement is consistent with the view that medical autonomy is contingent upon broad class forces, and the conceptualization of professional organizations as instruments for mediated occupational control.
Gabella, W.E.; Ruth, R.D.; Warnock, R.L.
1988-05-01
Periodic solutions of the Hamilton-Jacobi equation determine invariant tori in phase space. The Fourier spectrum of a torus with respect to angular coordinates gives useful information about nonlinear resonances and their potential for causing instabilities. We describe a method to solve the Hamilton-Jacobi equation for an arbitrary accelerator lattice. The method works with Fourier modes of the generating functions, and imposes periodicity in the machine azimuth by a shooting method. We give examples leading to three-dimensional plots in a surface of section. It is expected that the technique will be useful in lattice optimization. 14 refs., 6 figs., 1 tab.
The Shock and Vibration Digest. Volume 15. Number 2
1983-02-01
Propallar nolia, Nolia pradlctlon An axparlmantal itudy of tha wund field of K-icala ganaral aviation propallari hat baan complotad. Tha rawlti of than...of Social Survey Data on Noiae Effects F.L.Hall and S.M.Taylor McMaster Univ., Hamilton, Ontario, L8S 4K1, Cana- da, J. Acoust. Soc. Amer., 72 (4...significantly from the structural behavior predicted by added mass, or Incompressible, representations of the fluid. 83-341 IneUatk Cyclic Analysis of Pin
Hitzl, D. L.; Zele, F.
Recently, the application of Hamilton's law of varying action to initial value problems in dynamics has been generalized and simplified. Using the Hitzl et al. (1984) new integral variation method, approximate solutions can be constructed to arbitrary initial value problems involving systems of first-order ordinary differential equations. The new constructive technique is briefly described, and the method is illustrated with two example problems: (1) the damped oscillator (two linear differential equations), and (2) the Lagrange planetary equations with zonal harmonics and drag (a highly nonlinear system of six coupled first-order differential equations). Numerical results confirm that the integral variation method indeed provides accurate approximate analytical solutions over a specified finite time interval.
Hybrid massively parallel fast sweeping method for static Hamilton-Jacobi equations
Detrixhe, Miles; Gibou, Frédéric
2016-10-01
The fast sweeping method is a popular algorithm for solving a variety of static Hamilton-Jacobi equations. Fast sweeping algorithms for parallel computing have been developed, but are severely limited. In this work, we present a multilevel, hybrid parallel algorithm that combines the desirable traits of two distinct parallel methods. The fine and coarse grained components of the algorithm take advantage of heterogeneous computer architecture common in high performance computing facilities. We present the algorithm and demonstrate its effectiveness on a set of example problems including optimal control, dynamic games, and seismic wave propagation. We give results for convergence, parallel scaling, and show state-of-the-art speedup values for the fast sweeping method.
Leclerc, M
2012-01-01
We introduce a symmetric Poisson bracket that allows us to describe anticommuting fields on a classical level in the same way as commuting fields, without the use of Grassmann variables. By means of a simple example, we show how the Dirac bracket for the elimination of the second class constraints can be introduced, how the classical Hamiltonian equations can be derived and how quantization can be achieved through a direct correspondence principle. Finally, we show that the semiclassical limit of the corresponding Schroedinger equation leads back to the Hamilton-Jacobi equation of the classical theory. Summarizing, it is shown that the relations between classical and quantum theory are valid for fermionic fields in exactly the same way as in the bosonic case, and that there is no need to introduce anticommuting variables on a classical level.
Buenker, R J
2003-01-01
The erroneous prediction of the speed of light in dispersive media has been looked upon historically as unequivocal proof that Newton's corpuscular theory is incorrect. Examination of his arguments shows that they were only directly applicable to the momentum of photons, however, leaving open the possibility that the cause of his mistake was the unavailability of a suitable mechanical theory to enable a correct light speed prediction, rather than his use of a particle model. It is shown that Hamilton's canonical equations of motion remove Newton's error quantitatively, and also lead to the most basic formulas of quantum mechanics without reference to any of the pioneering experiments of the late nineteenth century. An alternative formulation of the wave-particle duality principle is then suggested which allows the phenomena of interference and diffraction to be understood in terms of statistical distributions of large populations of photons or other particles.
Hamilton-Jacobi method for molecular distribution function in a chemical oscillator.
Nakanishi, Hiizu; Sakaue, Takahiro; Wakou, Jun'ichi
2013-12-07
Using the Hamilton-Jacobi method, we solve chemical Fokker-Planck equations within the Gaussian approximation and obtain a simple and compact formula for a conditional probability distribution. The formula holds in general transient situations, and can be applied not only to a steady state but also to an oscillatory state. By analyzing the long time behavior of the solution in the oscillatory case, we obtain the phase diffusion constant along the periodic orbit and the steady distribution perpendicular to it. A simple method for numerical evaluation of these formulas are devised, and they are compared with Monte Carlo simulations in the case of Brusselator as an example. Some results are shown to be identical to previously obtained expressions.
A Hamilton-Jacobi-Bellman approach for termination of seizure-like bursting.
Wilson, Dan; Moehlis, Jeff
2014-10-01
We use Hamilton-Jacobi-Bellman methods to find minimum-time and energy-optimal control strategies to terminate seizure-like bursting behavior in a conductance-based neural model. Averaging is used to eliminate fast variables from the model, and a target set is defined through bifurcation analysis of the slow variables of the model. This method is illustrated for a single neuron model and for a network model to illustrate its efficacy in terminating bursting once it begins. This work represents a numerical proof-of-concept that a new class of control strategies can be employed to mitigate bursting, and could ultimately be adapted to treat medically intractible epilepsy in patient-specific models.
The Classical Limit of Minimal Length Uncertainty Relation:Revisit with the Hamilton-Jacobi Method
Guo, Xiaobo; Yang, Haitang
2015-01-01
The existence of a minimum measurable length could deform not only the standard quantum mechanics but also classical physics. The effects of the minimal length on classical orbits of particles in a gravitation field have been investigated before, using the deformed Poisson bracket or Schwarzschild metric. In this paper, we use the Hamilton-Jacobi method to study motions of particles in the context of deformed Newtonian mechanics and general relativity. Specifically, the precession of planetary orbits, deflection of light, and time delay in radar propagation are considered in this paper. We also set limits on the deformation parameter by comparing our results with the observational measurements. Finally, comparison with results from previous papers is given at the end of this paper.
Saroj Kumar Ghosh
2015-08-01
Full Text Available Organization of various cells lining the olfactory mucosa of Puntius ticto (Hamilton, 1822 were described by light as well as scanning electron microscopy. The paired olfactory chambers located antero-dorsal to the eyes and communicated outside through anterior and posterior nasal openings. The oval shaped olfactory rosette lied at the bottom of chamber and composed of 18-20 lamellae arranged on either side of median raphe. Sensory and non-sensory regions were distributed separately on each lamella. The sensory epithelium consisted mainly of two distinct morphological forms: ciliated and microvillous receptor cells. The non-sensory epithelium contained ciliated non-sensory cells, stratified epithelial cells with concentric microridges and mucous cells. Basal cells were situated at the deeper part of the epithelium, adjacent to the central core. The functional significance of cellular components of the olfactory epithelium was discussed with the habit and habitat of fish.
Binding of polycyclic aromatic hydrocarbons by size classes of particulate in Hamilton Harbor water
Leppard, G.G. [National Water Research Inst., Burlington, Ontario (Canada). Aquatic Ecosystem Protection Branch]|[McMaster Univ., Hamilton, Ontario (Canada). Dept. of Biology; Flannigan, D.T. [McMaster Univ., Hamilton, Ontario (Canada). Dept. of Biology; Mavrocordatos, D. [McMaster Univ., Hamilton, Ontario (Canada). Dept. of Biology]|[Univ. of Lausanne (Switzerland). Dept. of Chemistry; Marvin, C.H. [McMaster Univ., Hamilton, Ontario (Canada). Dept. of Chemistry]|[Agriculture and Agri-Food Canada, Vineland Station Ontario (Canada). Pest Management Research Centre; Bryant, D.W.; McCarry, B.E. [McMaster Univ., Hamilton, Ontario (Canada)
1998-11-15
In aquatic systems there is considerable transport of organic contaminants on suspended particles that act as carriers and influence the redistribution, bioavailability, and ultimate fate of contaminants. Using methodology not previously applied to the analysis of lake water, the authors demonstrate that polycyclic aromatic hydrocarbons (PAH) in Hamilton Harbor are predominantly sorbed to suspended flocs. Techniques employed were as follows: (i) differential cascade sedimentation and centrifugation to separate suspended particles; (ii) scanning transmission electron microscopy and energy-dispersive spectroscopy to identify flocs and individual particles in the size range of 10{sup {minus}3}--10{sup 3} {micro}m; (iii) gas chromatography-mass spectrometry to identify PAH in extracts prepared from size classes. Heterogeneous flocs larger than 20 {micro}m accounted for roughly 98% of phenanthrene binding, 89% of fluoranthene binding, and 85% of pyrene binding.
The list of tantalum lines for wavelengths calibration of the Hamilton echelle-spectrograph
Pakhomov, Yu V
2015-01-01
We present solution of the problem of wavelength calibration for Hamilton Echelle spectrograph using hollow cathode lamp, which was operated at Lick Observatory Shane telescope before June 9, 2011. The spectrum of the lamp claimed to be thorium-argon, contains, in addition to the lines of thorium and argon, a number of the unrecognized lines identified by us with tantalum. Using atomic data for measured lines of tantalum and thorium, we estimated the temperature of the gas in the lamp as T=3120+/-60 K. From the atomic line database VALD3 we selected all lines of TaI and TaII which can be seen in the spectrum of the lamp and compiled a list for the use in the processing of spectral observations. We note a limitation of the accuracy of calibration due to the influence of the hyperfine line splitting.
Initialization of the Shooting Method via the Hamilton-Jacobi-Bellman Approach
Cristiani, Emiliano
2009-01-01
The aim of this paper is to investigate from the numerical point of view the possibility of coupling the Hamilton-Jacobi-Bellman (HJB) equation and Pontryagin's Minimum Principle (PMP) to solve some control problems. A rough approximation of the value function computed by the HJB method is used to obtain an initial guess for the PMP method. The advantage of our approach over other initialization techniques (such as continuation or direct methods) is to provide an initial guess close to the global minimum. Numerical tests involving multiple minima, discontinuous control, singular arcs and state constraints are considered. The CPU time for the proposed method is less than four minutes up to dimension four, without code parallelization.
Probabilistic formulation of estimation problems for a class of Hamilton-Jacobi equations
Hofleitner, Aude
2012-12-01
This article presents a method for deriving the probability distribution of the solution to a Hamilton-Jacobi partial differential equation for which the value conditions are random. The derivations lead to analytical or semi-analytical expressions of the probability distribution function at any point in the domain in which the solution is defined. The characterization of the distribution of the solution at any point is a first step towards the estimation of the parameters defining the random value conditions. This work has important applications for estimation in flow networks in which value conditions are noisy. In particular, we illustrate our derivations on a road segment with random capacity reductions. © 2012 IEEE.
Hamilton-Jacobi formalism for inflation with non-minimal derivative coupling
Sheikhahmadi, Haidar; Saridakis, Emmanuel N.; Aghamohammadi, Ali; Saaidi, Khaled
2016-10-01
In inflation with nonminimal derivative coupling there is not a conformal transformation to the Einstein frame where calculations are straightforward, and thus in order to extract inflationary observables one needs to perform a detailed and lengthy perturbation investigation. In this work we bypass this problem by performing a Hamilton-Jacobi analysis, namely rewriting the cosmological equations considering the scalar field to be the time variable. We apply the method to two specific models, namely the power-law and the exponential cases, and for each model we calculate various observables such as the tensor-to-scalar ratio, and the spectral index and its running. We compare them with 2013 and 2015 Planck data, and we show that they are in a very good agreement with observations.
Holographic renormalization and Ward identities with the Hamilton-Jacobi method
Martelli, Dario E-mail: d.martelli@qmul.ac.uk; Mueck, Wolfgang E-mail: mueck@na.infn.it
2003-03-24
A systematic procedure for performing holographic renormalization, which makes use of the Hamilton-Jacobi method, is proposed and applied to a bulk theory of gravity interacting with a scalar field and a U(1) gauge field in the Stueckelberg formalism. We describe how the power divergences are obtained as solutions of a set of 'descent equations' stemming from the radial Hamiltonian constraint of the theory. In addition, we isolate the logarithmic divergences, which are closely related to anomalies. The method allows to determine also the exact one-point functions of the dual field theory. Using the other Hamiltonian constraints of the bulk theory, we derive the Ward identities for diffeomorphisms and gauge invariance. In particular, we demonstrate the breaking of U(1){sub R} current conservation, recovering the holographic chiral anomaly recently discussed in and.
Hamilton-Jacobi method for molecular distribution function in a chemical oscillator
Nakanishi, Hiizu; Sakaue, Takahiro; Wakou, Jun'ichi
2013-12-01
Using the Hamilton-Jacobi method, we solve chemical Fokker-Planck equations within the Gaussian approximation and obtain a simple and compact formula for a conditional probability distribution. The formula holds in general transient situations, and can be applied not only to a steady state but also to an oscillatory state. By analyzing the long time behavior of the solution in the oscillatory case, we obtain the phase diffusion constant along the periodic orbit and the steady distribution perpendicular to it. A simple method for numerical evaluation of these formulas are devised, and they are compared with Monte Carlo simulations in the case of Brusselator as an example. Some results are shown to be identical to previously obtained expressions.
Hawking radiation from a Vaidya black hole by Hamilton-Jacobi method
Ding, Han; Liu, Wen-Biao
2011-03-01
Using the Hamilton-Jacobi method, Hawking radiation from the apparent horizon of a dynamical Vaidya black hole is calculated. The black hole thermodynamics can be built successfully on the apparent horizon. If a relativistic perturbation is given to the apparent horizon, a similar calculation can also lead to a purely thermal spectrum, which corresponds to a modified temperature from the former. The first law of thermodynamics can also be constructed successfully at a new supersurface which has a small deviation from the apparent horizon. When the event horizon is thought as such a deviation from the apparent horizon, the expressions of the characteristic position and temperature are consistent with the previous result that asserts that thermodynamics should be built on the event horizon. It is concluded that the thermodynamics should be constructed on the apparent horizon exactly while the event horizon thermodynamics is just one of the perturbations near the apparent horizon.
Hawking radiation of Reissner-Nordstrom-de Sitter black hole by Hamilton-Jacobi method
Hossain, M Ilias
2013-01-01
In Refs. (M. Atiqur Rahman, M. Ilias Hossain (2012) Phys. Lett. B {\\bf 712} 1), we have developed Hamilton-Jacobi method for dynamical spacetime and discussed Hawking radiation of Schwarzschild-de Sitter black hole by massive particle tunneling method. In this letter, we have investigated the hawking purely thermal and nonthermal radiations of Reissner-Nordstr\\"{o}m-de Sitter (RNdS) black hole. We have considered energy and angular momentum as conserved and shown that the tunneling rate is related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The results we have obtained for RNdS black hole is also in accordance with Parikh and Wilczek\\rq s opinion and recovered the new result for Hawking radiation of RNdS black hole.
Back-Reaction of Black Hole Radiation from Hamilton-Jacobi Method
Ding, Chikun
2013-10-01
In the frame of Hamilton-Jacobi method, the back-reactions of the radiating particles together with the total entropy change of the whole system are investigated. The emission probability from this process is found to be equivalent to the null geodesic method. However its physical picture is more clear: the negative energy one of a virtual particle pair is absorbed by the black hole, resulting in the temperature, electric potential and angular velocity increase; then the black hole amount of heat, electric charge and angular momentum can spontaneously transfer to the positive energy particle; when obtaining enough energy, it can escape away to infinity, visible to distant observers. And this method can be applied to any sort of horizons and particles without a specific choice of (regular-across-the-horizon) coordinates.
The classical limit of minimal length uncertainty relation: revisit with the Hamilton-Jacobi method
Guo, Xiaobo; Wang, Peng; Yang, Haitang
2016-05-01
The existence of a minimum measurable length could deform not only the standard quantum mechanics but also classical physics. The effects of the minimal length on classical orbits of particles in a gravitation field have been investigated before, using the deformed Poisson bracket or Schwarzschild metric. In this paper, we first use the Hamilton-Jacobi method to derive the deformed equations of motion in the context of Newtonian mechanics and general relativity. We then employ them to study the precession of planetary orbits, deflection of light, and time delay in radar propagation. We also set limits on the deformation parameter by comparing our results with the observational measurements. Finally, comparison with results from previous papers is given at the end of this paper.
On a Lagrange-Hamilton formalism describing position and momentum uncertainties
Schuch, Dieter
1993-01-01
According to Heisenberg's uncertainty relation, in quantum mechanics it is not possible to determine, simultaneously, exact values for the position and the momentum of a material system. Calculating the mean value of the Hamiltonian operator with the aid of exact analytic Gaussian wave packet solutions, these uncertainties cause an energy contribution additional to the classical energy of the system. For the harmonic oscillator, e.g., this nonclassical energy represents the ground state energy. It will be shown that this additional energy contribution can be considered as a Hamiltonian function, if it is written in appropriate variables. With the help of the usual Lagrange-Hamilton formalism known from classical particle mechanics, but now considering this new Hamiltonian function, it is possible to obtain the equations of motion for position and momentum uncertainties.
Closed circle DNA algorithm of change positive-weighted Hamilton circuit problem
Zhou Kang; Tong Xiaojun; Xu Jin
2009-01-01
Chain length of closed circle DNA is equal. The same closed circle DNA's position corresponds to different recognition sequence, and the same recognition sequence corresponds to different foreign DNA segment, so closed circle DNA computing model is generalized. For change positive-weighted Hamilton circuit problem, closed circle DNA algorithm is put forward. First, three groups of DNA encoding are encoded for all arcs, and deck groups are designed for all vertices. All possible solutions axe composed. Then, the feasible solutions axe filtered out by using group detect experiment, and the optimization solutions are obtained by using group insert experiment and electrophoresis experiment. Finally, all optimization solutions are found by using detect experiment. Complexity of algorithm is concluded and validity of DNA algorithm is explained by an example. Three dominances of the closed circle DNA algorithm are analyzed, and characteristics and dominances of group delete experiment axe discussed.
Hamilton-Jacobi formalism for inflation with non-minimal derivative coupling
Sheikhahmadi, Haidar; Aghamohammadi, Ali; Saaidi, Khaled
2016-01-01
In inflation with nonminimal derivative coupling there is not a conformal transformation to the Einstein frame where calculations are straightforward, and thus in order to extract inflationary observables one needs to perform a detailed and lengthy perturbation investigation. In this work we bypass this problem by performing a Hamilton-Jacobi analysis, namely rewriting the cosmological equations considering the scalar field to be the time variable. We apply the method to two specific models, namely the power-law and the exponential cases, and for each model we calculate various observables such as the tensor-to-scalar ratio, and the spectral index and its running. We compare them with 2013 and 2015 Planck data, and we show that they are in a very good agreement with observations.
Solutions to estimation problems for scalar hamilton-jacobi equations using linear programming
Claudel, Christian G.
2014-01-01
This brief presents new convex formulations for solving estimation problems in systems modeled by scalar Hamilton-Jacobi (HJ) equations. Using a semi-analytic formula, we show that the constraints resulting from a HJ equation are convex, and can be written as a set of linear inequalities. We use this fact to pose various (and seemingly unrelated) estimation problems related to traffic flow-engineering as a set of linear programs. In particular, we solve data assimilation and data reconciliation problems for estimating the state of a system when the model and measurement constraints are incompatible. We also solve traffic estimation problems, such as travel time estimation or density estimation. For all these problems, a numerical implementation is performed using experimental data from the Mobile Century experiment. In the context of reproducible research, the code and data used to compute the results presented in this brief have been posted online and are accessible to regenerate the results. © 2013 IEEE.
Manuel, R.; Gorissen, M.; Stokkermans, M.; Zethof, J.; Ebbesson, L.O.E.; Vis, van de J.W.; Flik, G.; Bos, van den R.
2015-01-01
The inhibitory avoidance paradigm allows the study of mechanisms underlying learning and memory formation in zebrafish (Danio rerio Hamilton). For zebrafish, the physiology and behavior associated with this paradigm are as yet poorly understood. We therefore assessed the effects of environmental enr
Fitzpatrick, P. M.; Harmon, G. R.; Liu, J. J. F.; Cochran, J. E.
1974-01-01
The formalism for studying perturbations of a triaxial rigid body within the Hamilton-Jacobi framework is developed. The motion of a triaxial artificial earth satellite about its center of mass is studied. Variables are found which permit separation, and the Euler angles and associated conjugate momenta are obtained as functions of canonical constants and time.
Sakamoto, Noboru; Schaft, Arjan J. van der
2007-01-01
In this paper, an analytical approximation approach for the stabilizing solution of the Hamilton-Jacobi equation using stable manifold theory is proposed. The proposed method gives approximated flows on the stable manifold of the associated Hamiltonian system and provides approximations of the
Sakamoto, Noboru; Schaft, Arjan J. van der
2007-01-01
In this paper, an analytical approximation approach for the stabilizing solution of the Hamilton-Jacobi equation using stable manifold theory is proposed. The proposed method gives approximated flows on the stable manifold of the associated Hamiltonian system and provides approximations of the stabl
Cardaliaguet, Pierre
2008-01-01
We investigate the regularity of solutions of first order Hamilton-Jacobi equation with super linear growth in the gradient variable. We show that the solutions are locally H\\"older continuous with H\\"older exponent depending only on the growth of the Hamiltonian. The proof relies on a reverse H\\"older inequality.
2011-12-15
... Energy Regulatory Commission Brian Hamilton v. El Paso Natural Gas, El Paso Western Pipelines; Notice Announcing Docket Number Change On December 2, 2011, the Commission issued a notice in docket number RP12-220... docket number, RP12-220-000 and give the proceeding a new docket number. This notice changes the...
Nicolaidis, Mary; Sica, Michael
The major goal of Project SPEED (at Fort Hamilton High School, Brooklyn, New York) was dropout prevention. In its first year of operation, 1982-83, the project provided English as a Second Language (ESL) instruction, bilingual instruction in basic skills required for graduation, and guidance services to approximately 300 limited English proficient…
Mortality incidence in outpatient anesthesia for dentistry in Ontario.
Nkansah, P J; Haas, D A; Saso, M A
1997-06-01
Studies determining anesthesia mortality rates in dentistry have been published, yet a similar investigation has never been conducted in Canada. Therefore the objective of this study was to determine the incidence of mortality when general anesthesia or deep sedation was administered by qualified dentists in the province of Ontario. Mortality data were obtained from the years 1973 to 1995 inclusive. The number of general anesthetics and deep sedations administered annually by qualified in dental offices was calculated by surveying all oral and maxillofacial surgeons and dental anesthetists in Ontario in 1990 and 1995. The results provided an estimate of 2,830,000 cases from 1973 to 1995 inclusive. Over this time period there were four deaths associated with cases in which either an oral and maxillofacial surgeon or dental anesthetist administered the general anesthetic or deep sedation, yielding a mortality rate of 1.4 per 1,000,000. This mortality incidence is similar to rates already published for outpatient dentistry.
Ontario's Poverty Reduction Strategy: A Critical Discourse Analysis.
Benbow, Sarah; Gorlick, Carolyne; Forchuk, Cheryl; Ward-Griffin, Catherine; Berman, Helene
2016-01-01
This article overviews the second phase of a two-phase study which examined experiences of health and social exclusion among mothers experiencing homelessness in Ontario, Canada. A critical discourse analysis was employed to analyze the policy document, Realizing Our Potential: Ontario's Poverty Reduction Strategy, 2014-2019. In nursing, analysis of policy is an emerging form of scholarship, one that draws attention to the macro levels influencing health and health promotion, such as the social determinants of health, and the policies that impact them. The clear neo-liberal underpinnings, within the strategy, with a focus on productivity and labor market participation leave little room for an understanding of poverty reduction from a human rights perspective. Further, gender-neutrality rendered the poverty experienced by women, and mothers, invisible. Notably, there were a lack of deadlines, target dates, and thorough action and evaluation plans. Such absence troubles whether poverty reduction is truly a priority for the government, and society as a whole.
Wastewater quality control at Sarnia (Ontario, Canada) petrochemical industries
Vianna, Arlinda C. [Servico Nacional de Aprendizagem Industrial (SENAI), Salvador, BA (Brazil); Souza, Eliane S.; Himmelman, William [Lambton College, Sarnia, ON (Canada)
1993-12-31
Ontario industries are required by law to meet strict regulations under the provinces under MISA initiative (Municipal-Industrial Strategy for Abatement). The petroleum-petrochemical area was selected as a leader in the development of new environmental objectives, and monitoring and training programs. Sarnia has become a world leader in industrial environmental control systems and the approach toward zero emissions. 4 refs., 6 figs., 2 tabs.
Adaptation to climate change in the Ontario public health sector
Paterson Jaclyn A
2012-06-01
Full Text Available Abstract Background Climate change is among the major challenges for health this century, and adaptation to manage adverse health outcomes will be unavoidable. The risks in Ontario – Canada’s most populous province – include increasing temperatures, more frequent and intense extreme weather events, and alterations to precipitation regimes. Socio-economic-demographic patterns could magnify the implications climate change has for Ontario, including the presence of rapidly growing vulnerable populations, exacerbation of warming trends by heat-islands in large urban areas, and connectedness to global transportation networks. This study examines climate change adaptation in the public health sector in Ontario using information from interviews with government officials. Methods Fifty-three semi-structured interviews were conducted, four with provincial and federal health officials and 49 with actors in public health and health relevant sectors at the municipal level. We identify adaptation efforts, barriers and opportunities for current and future intervention. Results Results indicate recognition that climate change will affect the health of Ontarians. Health officials are concerned about how a changing climate could exacerbate existing health issues or create new health burdens, specifically extreme heat (71%, severe weather (68% and poor air-quality (57%. Adaptation is currently taking the form of mainstreaming climate change into existing public health programs. While adaptive progress has relied on local leadership, federal support, political will, and inter-agency efforts, a lack of resources constrains the sustainability of long-term adaptation programs and the acquisition of data necessary to support effective policies. Conclusions This study provides a snapshot of climate change adaptation and needs in the public health sector in Ontario. Public health departments will need to capitalize on opportunities to integrate climate change into
/sup 137/Cs radioactive dating of Lake Ontario sediment cores
Ward, T.E.; Breeden, J.; Komisarcik, K.; Porter, R.; Czuczwa, J.; Kaminski, R.; McVeety, B.D.
1987-12-01
The distribution of /sup 137/Cs in sediment cores from Lake Ontario provides estimates of the sediment accumulation rates. Geochronology with /sup 210/Pb dating and distribution of Ambrosia (ragweed) pollen compare well with /sup 137/Cs dating. These methods can determine with precision, changes in sedimentation occurring over the past 100 years or so. Typical sedimentation rates of 0.18-0.36 cm/yr were measured. 16 refs., 3 figs., 2 tabs.
Helicobacter pylori Infection in Ontario: Prevalence and Risk Factors
Farah Naja
2007-01-01
Full Text Available BACKGROUND: Helicobacter pylori has been classified by the World Health Organization as a type I carcinogen. Nearly 50% of the world’s population is estimated to be infected with H pylori. Prevalence patterns of the infection are different between developing and developed countries. The present study had two objectives – to estimate the prevalence of H pylori infection in Ontario, and to evaluate the relationship between the infection and various demographic characteristics and selected lifestyle factors.
Postexposure Treatment and Animal Rabies, Ontario, 1958-2000
Nunan, Christopher P.; Honig, Janet M.; Ball, David G. A.; Hauschildt, Peggy; LeBer, Charles A.
2002-01-01
This paper investigates the relationship between animal rabies and postexposure treatment (PET) in Ontario by examining the introduction of human diploid cell vaccine (HDCV) in 1980 and the initiation of an oral rabies vaccination program for wildlife in 1989. Introducing HDCV led to an immediate doubling of treatments. Both animal rabies and human treatments declined rapidly after the vaccination program was introduced, but human treatments have leveled off at approximately 1,000 per year. PMID:11897079
Ontario courts reaffirm right to marijuana for therapeutic purposes.
Weiss, Rémi
2011-10-01
In a judgment dated 11 April 20 11, the Ontario Superior Court declared that the Medical Marijuana Access Regulations (MMAR), and Sections 4 and 7 of the Controlled Drugs and Substances Act (CDSA), that prohibit the possession and production of cannabis, are unconstitutional because, in practice, they prevent effective access to marijuana for therapeutic purposes, and therefore violate Section 7 of the Canadian Charter of Rights and Freedoms (Charter).
The organization of district health councils in Ontario
Dixon, F Maureen
1982-01-01
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University. This action research project with district health councils (DHCs) in Ontario, Canada, took place between 1976 and 1980. The purpose of the research was to identify the most effective forms of organization for DHCs, bodies set up to provide a local focus for planning and coordination of health services in the Province. The research method was based on social analysis, a method developed ove...
Photonics education and training in Ontario, Canada: an integrated plan
Nantel, Marc; Beda, Johann
2002-05-01
Canada has established itself as a leader in photonics. Ontario in particular - home of giants such as JDS Uniphase, Nortel Networks, GSI Lumonics and an increasing number of successful start-up companies - has seen the demand for highly-qualified personnel in photonics grow exponentially in the past few years. The scarcity of these photonics experts has become - recent market woes not withstanding - the single most important impediment to the further growth of photonics companies. Nonetheless, it is mostly at the graduate school level that lasers and photonics are introduced to students, with only very few thus being trained in the field. Photonics Research Ontario has put together an aggressive plan to change this situation and present Optics, Lasers and Photonics at all levels in the education system, from grade school to graduate school. This paper will present this Photonics Education and Training plan, as well as other efforts being undertaken across Canada to address this crucial issue. The paper will focus especially on the training of Photonics Technicians and Technologists in Ontario's Community Colleges. The new curriculum designed for these programs will be presented, and the importance of industry support will be emphasized.
Alberta's and Ontario's liquor boards: why such divergent outcomes?
Bird, Malcolm G
2010-01-01
The provinces of Alberta and Ontario have chosen very different methods to distribute alcoholic beverages: Alberta privatized the Alberta Liquor Control Board (ALCB) in 1993 and established a private market to sell beverage alcohol, while Ontario, in stark contrast, opted to retain and expand the Liquor Control Board of Ontario (LCBO). This article examines the reasons for the divergent policy choices made by Ralph Klein and Mike Harris' Conservative governments in each province. The article draws on John Kingdon's “multiple streams decision-making model,” to examine the mindsets of the key decision-makers, as well as “historical institutionalism,” to organize the pertinent structural, historical and institutional variables that shaped the milieu in which decision-makers acted. Unique, province-specific political cultures, histories, institutional configurations (including the relative influence of a number of powerful actors), as well as the fact that the two liquor control boards were on opposing trajectories towards their ultimate fates, help to explain the different decisions made by each government. Endogenous preference construction in this sector, furthermore, implies that each system is able to satisfy all relevant stakeholders, including consumers.
Salmonella in raccoons (Procyon lotor) in southern Ontario, Canada.
Jardine, Claire; Reid-Smith, Richard J; Janecko, Nicol; Allan, Mike; McEwen, Scott A
2011-04-01
Numerous serotypes of Salmonella have been detected in a variety of wild animals, including raccoons (Procyon lotor). Raccoons are common, mid-size omnivores that live in close association with people in urban and rural areas in Ontario. Although raccoons are known to shed Salmonella, little is known about their potential long-term role in maintaining Salmonella infections. We sampled feces from raccoons in three areas of Ontario: one primarily urban site around Niagara, one primarily rural site north of Guelph, and the grounds of the Toronto Zoo, in 2007 to identify which serotypes of Salmonella were commonly shed by raccoons in southern Ontario. In addition, we conducted a longitudinal study at the Toronto Zoo site to determine if raccoons remain persistently infected with Salmonella. Salmonella was found in 45% of samples. The prevalence of Salmonella in raccoon feces ranged from 27% at the rural site to 65% at the urban site. We detected 16 serotypes of Salmonella in 83 positive samples. The most common serotype detected in raccoons from the rural and zoo sites was Salmonella enterica serotype Typhimurium, whereas Salmonella Newport was detected most commonly in the urban site. Only one raccoon of 11 that were captured in four or more consecutive trapping sessions shed the same Salmonella serotype for two consecutive months, suggesting that raccoons regularly acquire new Salmonella serotypes from the environment.
The potential for green power marketing in Ontario
Kelly, B. [EcoPathways Consulting Inc., Whitby, ON (Canada)
1997-12-31
A review of Ontario Hydro`s green power program was provided. Market research indicates that the public is interested in renewable energy, that a significant portion of the public claim to be `green` consumers, and that they are willing to pay a premium for green power. There is, however, very little actual experiential evidence to show who is truly willing to pay and what price would be acceptable. Sources of `green electricity` include renewables such as hydro, solar, wind, biomass from farm and forest waste, methane from landfills, and geothermal. Public support in Ontario, and in most other parts of Canada, is strong for investment by power utilities in `green electricity`. In a limited program, Ontario Hydro is currently offering greenpower pricing for some of its proposed green power projects. To those willing to pay, a premium of 4 cents per kWh will be added to the current costs from the electricity retailer. The general impression of industry experts is that the demand for green power is there, however, the supply is not. Continued delays and uncertainty about the power industry`s future structure are considered to be the major impediments to implementing the green program. 1 tab., 7 figs.
The geographic distribution of tuberculosis and pyridoxine supply in Ontario.
McGuigan, M A; Yamada, J
1995-12-01
Acute poisoning with isoniazid causes generalized convulsions which should be treated with intravenous pyridoxine and a rapidly-acting anticonvulsant. The purpose of this study was to determine the correlation between the distribution of tuberculosis (as a proxy for isoniazid use) and acute care hospital supplies of intravenous pyridoxine (the antidote for isoniazid overdose). The distribution of tuberculosis was based on Ontario public health regions. The study was descriptive using simple linear regression to assess the degree of correlation. Only 15.6% of Ontario acute care hospitals have enough intravenous pyridoxine to treat an average isoniazid overdose. The distribution of tuberculosis and the number of hospitals in the region correlated best with hospital supplies of pyridoxine, although these variables explained only 22% and 23.7%, respectively, of the variation in supply. It does not appear that the distribution of tuberculosis is a major determinant of the availability of the isoniazid antidote, pyridoxine. Acute care hospitals in Ontario should re-evaluate their need for pyridoxine in light of the incidence of tuberculosis in their regions. Each hospital should stock at least 5 Gm of intravenous pyridoxine; additional amounts may be appropriate if there is an increased incidence in the area.
A critical review of financial measures as reported in the Ontario hospital balanced scorecard.
Parkinson, John; Tsasis, Peter; Porporato, Marcela
2007-01-01
For Ontario hospitals in Canada, the Financial Performance and Condition measures in the Ontario hospital balanced scorecard are especially of interest since in the foreseeable future, they may be linked to provincial government funding decisions. However, we find that these measures lack valuable information on key attributes that affect organizational performance. We suggest changes that focus on key drivers of performance and reflect the operational realities of Ontario hospitals.
Canonical equations of Hamilton for the nonlinear Schr\\"{o}dinger equation
Liang, Guo; Ren, Zhanmei
2013-01-01
We define two different systems of mathematical physics: the second-order differential system (SODS) and the first-order differential system (FODS). The Newton's second law of motion and the nonlinear Schr\\"{o}dinger equation (NLSE) are the exemplary SODS and FODS, respectively. We obtain a new kind of canonical equations of Hamilton (CEH), which are of some kind of symmetry in form and are formally different with the conventional CEH without symmetry [H. Goldstein, C. Poole, J. Safko, Classical Mechanics, third ed., Addison-Wesley, 2001]. We also prove that the number of the CEHs is equal to the number of the generalized coordinates for the FODS, but twice the number of the generalized coordinates for the SODS. We show that the FODS can only be expressed by the new CEH, but do not by the conventional CEH, while the SODS can be done by both the new and the conventional CEHs. As an example, we prove that the nonlinear Schr\\"{o}dinger equation can be expressed with the new CEH in a consistent way.
Canonical equations of Hamilton for the nonlinear Schrödinger equation
Liang, Guo; Guo, Qi; Ren, Zhanmei
2015-09-01
We define two different systems of mathematical physics: the second order differential system (SODS) and the first order differential system (FODS). The Newton's second law of motion and the nonlinear Schrödinger equation (NLSE) are the exemplary SODS and FODS, respectively. We obtain a new kind of canonical equations of Hamilton (CEH), which exhibit some kind of symmetry in form and are formally different from the conventional CEH without symmetry [H. Goldstein, C. Poole, J. Safko, Classical Mechanics, third ed., Addison- Wesley, 2001]. We also prove that the number of the CEHs is equal to the number of the generalized coordinates for the FODS, but twice the number of the generalized coordinates for the SODS. We show that the FODS can only be expressed by the new CEH, but not introduced by the conventional CEH, while the SODS can be done by both the new and the conventional CEHs. As an example, we prove that the nonlinear Schrödinger equation can be expressed with the new CEH in a consistent way.
Videla, Nelson [FCFM, Universidad de Chile, Departamento de Fisica, Santiago (Chile)
2017-03-15
In the present work we study the consequences of considering an inflationary universe model in which the Hubble rate has a quasi-exponential dependence in the inflaton field, given by H(φ) = H{sub inf} exp[((φ)/(m{sub p}))/(p(1+(φ)/(m{sub p})))]. We analyze the inflation dynamics under the Hamilton-Jacobi approach, which allows us to consider H(φ), rather than V(φ), as the fundamental quantity to be specified. By comparing the theoretical predictions of the model together with the allowed contour plots in the n{sub s} - r plane and the amplitude of primordial scalar perturbations from the latest Planck data, the parameters charactering this model are constrained. The model predicts values for the tensor-to-scalar ratio r and for the running of the scalar spectral index dn{sub s}/d ln k consistent with the current bounds imposed by Planck, and we conclude that the model is viable. (orig.)
Hamilton-Jacobi Many-Worlds Theory and the Heisenberg Uncertainty Principle
Tipler, Frank J
2010-01-01
I show that the classical Hamilton-Jacobi (H-J) equation can be used as a technique to study quantum mechanical problems. I first show that the the Schr\\"odinger equation is just the classical H-J equation, constrained by a condition that forces the solutions of the H-J equation to be everywhere $C^2$. That is, quantum mechanics is just classical mechanics constrained to ensure that ``God does not play dice with the universe.'' I show that this condition, which imposes global determinism, strongly suggests that $\\psi^*\\psi$ measures the density of universes in a multiverse. I show that this interpretation implies the Born Interpretation, and that the function space for $\\psi$ is larger than a Hilbert space, with plane waves automatically included. Finally, I use H-J theory to derive the momentum-position uncertainty relation, thus proving that in quantum mechanics, uncertainty arises from the interference of the other universes of the multiverse, not from some intrinsic indeterminism in nature.
Cook, Alana N; Moulden, Heather M; Mamak, Mini; Lalani, Shams; Messina, Katrina; Chaimowitz, Gary
2016-07-14
The Hamilton Anatomy of Risk Management-Forensic Version (HARM-FV) is a structured professional judgement tool of violence risk developed for use in forensic inpatient psychiatric settings. The HARM-FV is used with the Aggressive Incidents Scale (AIS), which provides a standardized method of recording aggressive incidents. We report the findings of the concurrent validity of the HARM-FV and the AIS with widely used measures of violence risk and aggressive acts, the Historical, Clinical, Risk Management-20, Version 3 (HCR-20(V3)) and a modified version of the Overt Aggression Scale. We also present findings on the predictive validity of the HARM-FV in the short term (1-month follow-up periods) for varying severities of aggressive acts. The results indicated strong support for the concurrent validity of the HARM-FV and AIS and promising support for the predictive accuracy of the tool for inpatient aggression. This article provides support for the continued clinical use of the HARM-FV within an inpatient forensic setting and highlights areas for further research. © The Author(s) 2016.
Wave front-ray synthesis for solving the multidimensional quantum Hamilton-Jacobi equation.
Wyatt, Robert E; Chou, Chia-Chun
2011-08-21
A Cauchy initial-value approach to the complex-valued quantum Hamilton-Jacobi equation (QHJE) is investigated for multidimensional systems. In this approach, ray segments foliate configuration space which is laminated by surfaces of constant action. The QHJE incorporates all quantum effects through a term involving the divergence of the quantum momentum function (QMF). The divergence term may be expressed as a sum of two terms, one involving displacement along the ray and the other incorporating the local curvature of the action surface. It is shown that curvature of the wave front may be computed from coefficients of the first and second fundamental forms from differential geometry that are associated with the surface. Using the expression for the divergence, the QHJE becomes a Riccati-type ordinary differential equation (ODE) for the complex-valued QMF, which is parametrized by the arc length along the ray. In order to integrate over possible singularities in the QMF, a stable and accurate Möbius propagator is introduced. This method is then used to evolve rays and wave fronts for four systems in two and three dimensions. From the QMF along each ray, the wave function can be easily computed. Computational difficulties that may arise are described and some ways to circumvent them are presented. © 2011 American Institute of Physics
Study of Finite Elements for Hamilton Systems%Hamilton系统的有限元研究
陈传淼; 汤琼
2011-01-01
该文对Hamilton系统的连续有限元法证明了两个优美的性质:在任何情形m次有限元总是能量守恒的,它对线性系统也是辛的,且对非线性系统每次步进是高精度O(h2m+1)近似辛的.在长时间计算中时空平面上轨道和周期的偏离随时间线性增长.数值实验表明其偏离比其他算法小.%Two nice properties of the continuous finite element method for Hamilton systems are proved as follows: in any case the m-degree finite elements always preserve the energy which is sympletic for linear systems and is approximately sympletic with high accuracy O(h2m+l) in each stepping for nonlinear systems. In long-time computation the deviation of trajectories and their periods in time-space plane will crease linearly with time. Numerical experiments show that their deviations are often smaller than that of other schemes.
Husbandry stress exacerbates mycobacterial infections in adult zebrafish, Danio rerio (Hamilton)
Ramsay, J.M.; Watral, V.; Schreck, C.B.; Kent, M.L.
2009-01-01
Mycobacteria are significant pathogens of laboratory zebrafish, Danio rerio (Hamilton). Stress is often implicated in clinical disease and morbidity associated with mycobacterial infections but has yet to be examined with zebrafish. The aim of this study was to examine the effects of husbandry stressors on zebrafish infected with mycobacteria. Adult zebrafish were exposed to Mycobacterium marinum or Mycobacterium chelonae, two species that have been associated with disease in zebrafish. Infected fish and controls were then subjected to chronic crowding and handling stressors and examined over an 8-week period. Whole-body cortisol was significantly elevated in stressed fish compared to non-stressed fish. Fish infected with M. marinum ATCC 927 and subjected to husbandry stressors had 14% cumulative mortality while no mortality occurred among infected fish not subjected to husbandry stressors. Stressed fish, infected with M. chelonae H1E2 from zebrafish, were 15-fold more likely to be infected than non-stressed fish at week 8 post-injection. Sub-acute, diffuse infections were more common among stressed fish infected with M. marinum or M. chelonae than non-stressed fish. This is the first study to demonstrate an effect of stress and elevated cortisol on the morbidity, prevalence, clinical disease and histological presentation associated with mycobacterial infections in zebrafish. Minimizing husbandry stress may be effective at reducing the severity of outbreaks of clinical mycobacteriosis in zebrafish facilities. ?? 2009 Blackwell Publishing Ltd.
Equation of motion of canonical tensor model and Hamilton-Jacobi equation of general relativity
Chen, Hua; Sato, Yuki
2016-01-01
The canonical tensor model (CTM) is a rank-three tensor model formulated as a totally constrained system in the canonical formalism. The constraint algebra of CTM has a similar structure as that of the ADM formalism of general relativity, and is studied as a discretized model for quantum gravity. In this paper, we analyze the classical equation of motion (EOM) of CTM in a formal continuum limit through a derivative expansion of the tensor up to the forth order, and show that it is the same as the EOM of a coupled system of gravity and a scalar field derived from the Hamilton-Jacobi equation with an appropriate choice of an action. The action contains a scalar field potential of an exponential form, and the system classically respects a dilatational symmetry. We find that the system has a critical dimension, given by six, over which it becomes unstable due to the wrong sign of the scalar kinetic term. In six dimensions, de Sitter spacetime becomes a solution to the EOM, signaling the emergence of a conformal s...
Quantized Hamilton dynamics describes quantum discrete breathers in a simple way.
Igumenshchev, Kirill; Prezhdo, Oleg
2011-08-01
We study the localization of energy in a nonlinear coupled system, exhibiting so-called breather modes, using quantized Hamilton dynamics (QHD). Already at the lowest order, which is only twice as complex as classical mechanics, this simple semiclassical method incorporates quantum-mechanical effects. The transition between the localized and delocalized regimes is instantaneous in classical mechanics, while it is gradual due to tunneling in both quantum mechanics and QHD. In contrast to classical mechanics, which predicts an abrupt appearance of breathers, quantum mechanics and QHD show an alternation of localized and delocalized behavior in the transient region. QHD includes zero-point energy that is reflected in a shifted energy asymptote for the localized states, providing another improvement on the classical perspective. By detailed analysis of the distribution and transfer of energy within classical mechanics, QHD, and quantum dynamics, we conclude that QHD is an efficient approach that accounts for moderate quantum effects and can be used to identify quantum breathers in large nonlinear systems.
Study of invariant surfaces and their break-up by the Hamilton-Jacobi method
Warnock, R.L.; Ruth, R.D.
1986-08-01
A method is described to compute invariant tori in phase space for calssical non-integrable Hamiltonian systems. Our procedure is to solve the Hamilton-Jacobi equation stated as a system of equations for Fourier coefficients of the generating function. The system is truncated to a finite number of Fourier modes and solved numerically by Newton's method. The resulting canonical transformation serves to reduce greatly the non-integrable part of the Hamiltonian. In examples studied to date the convergence properties of the method are excellent, even near chaotic regions and on the separatrices of isolated broad resonances. We propose a criterion for breakup of invariant surfaces, namely the vanishing of the Jacobian of the canonical transformation to new angle variables. By comparison with results from tracking, we find in an example with two nearly overlapping resonances that this criterion can be implemented with sufficient accuracy to determine critical parameters for the breakup ('transition to chaos') to an accuracy of 5 to 10%.
Performance of orangefin labeo, Labeo calbasu (Hamilton 1822 as a component of polyculture system
Bibha Chetia Borah
2014-04-01
Full Text Available This paper deals with the performance of orangefin labeo, Labeo calbasu (Hamilton, 1822 as a component of conventional composite carp culture system. The species was included as 50% substitution to common carp (Cyprinus carpio in view of its omnivorous feeding habit and bottom dwelling nature. The total production was 0.55% higher in the experimental culture (with L. calbasu and Cyprinus carpio than in the control (common carp only. The difference in the production was however not significant statistically. The comparative economics revealed 5.30% higher return from the experimental unit. Comparison of growth pattern and survival rates of other five species of carps indicated that inclusion of L. calbasu did not have any adverse impact on the other carps. Growth rate of other carps was observed to be higher in the experimental set by 0.05% on an average than the control. Calculated profit per hectare was found to be 9.2% higher in experimental plot than in the control. Although the gross production and return in the experimental unit was not significantly higher than the control, the data supported that L. calbasu is compatible to other component species in composite carp culture system and its inclusion will enhance the economic viability of the system.
Ghosh Saroj Kumar
2016-12-01
Full Text Available The morphoanatomy, cellular organization, and surface architecture of the olfactory apparatus in Cirrhinus reba (Hamilton is described using light and scanning electron microscopy. The oval shaped olfactory rosette contained 32 ± 2 primary lamellae on each side of the median raphe, and was lodged on the floor of the olfactory chamber. The olfactory lamellae were basically flat and compactly arranged in the rosette. The olfactory chamber communicated to the outside aquatic environment through inlet and outlet apertures with a conspicuous nasal flap in between. The mid dorsal portion of the olfactory lamellae was characterized by a linguiform process. Sensory and non-sensory regions were distributed separately on each lamella. The sensory epithelium occupied the apical part including the linguiform process, whereas the resting part of the lamella was covered with non-sensory epithelium. The sensory epithelium comprised both ciliated and microvillous receptor cells distinguished by the architecture on their apical part. The non-sensory epithelium possessed mucous cells, labyrinth cells, and stratified epithelial cells with distinctive microridges. The functional importance of the different cells lining the olfactory mucosa was correlated with the ecological habits of the fish examined.
High-Order Semi-Discrete Central-Upwind Schemes for Multi-Dimensional Hamilton-Jacobi Equations
Bryson, Steve; Levy, Doron; Biegel, Bryan (Technical Monitor)
2002-01-01
We present the first fifth order, semi-discrete central upwind method for approximating solutions of multi-dimensional Hamilton-Jacobi equations. Unlike most of the commonly used high order upwind schemes, our scheme is formulated as a Godunov-type scheme. The scheme is based on the fluxes of Kurganov-Tadmor and Kurganov-Tadmor-Petrova, and is derived for an arbitrary number of space dimensions. A theorem establishing the monotonicity of these fluxes is provided. The spacial discretization is based on a weighted essentially non-oscillatory reconstruction of the derivative. The accuracy and stability properties of our scheme are demonstrated in a variety of examples. A comparison between our method and other fifth-order schemes for Hamilton-Jacobi equations shows that our method exhibits smaller errors without any increase in the complexity of the computations.
Hailati, G.; Hu, Z. H.
2016-08-01
The transient stability of interconnected network with supplementary time-delay controller for generator excitations and static var compensator (SVC) has been investigated in this paper. Firstly, a delay-dependent stability criterion based on Hamilton function method is derived, and the criterion is in term of matrix inequalities. Secondly, a nonlinear time-delay Hamilton function model of interconnected network with SVCs is constructed. Thirdly, the wide-area time-delay supplementary controller (WATSC) for the interconnected network is designed and converted into the form of Hamiltonian system. The delay-dependent stability of the closed-loop power system is analysed. The gains of the WATSC are determined by using the theoretical analysis results. It is effective for the designed WATSC installed in the 16- machine, 68-bus power system for damping the inter-area modes. Then simulation results show that the method of the controller is effective.
Self-gravitation interaction of IR deformed Hořava-Lifshitz gravity via new Hamilton-Jacobi method
Liu, Molin; Xu, Yin; Lu, Junwang; Yang, Yuling; Lu, Jianbo; Wu, Yabo
2014-06-01
The apparent discovery of logarithmic entropies has a significant impact on IR deformed Hořava-Lifshitz (IRDHL) gravity in which the original infrared (IR) property is improved by introducing three-geometry's Ricci scalar term "μ4 R" in action. Here, we reevaluate the Hawking radiation in IRDHL by using recent new Hamilton-Jacobi method (NHJM). In particular, a thorough analysis is considered both in asymptotically flat Kehagias-Sfetsos and asymptotically non-flat Park models in IRDHL. We find the NHJM offers simplifications on the technical side. The modification in the entropy expression is given by the physical interpretation of self-gravitation of the Hawking radiation in this new Hamilton-Jacobi (HJ) perspectives.
The burden of mental illness and addiction in ontario.
Ratnasingham, Sujitha; Cairney, John; Manson, Heather; Rehm, Jürgen; Lin, Elizabeth; Kurdyak, Paul
2013-09-01
Objectif : Le service de Santé publique de l’Ontario et l’Institut pour les sciences évaluatives cliniques ont collaboré pour estimer le fardeau de la maladie attribuable aux trouble mentaux et aux toxicomanies en Ontario. Méthodes : Les années de vie ajustées en fonction de la santé ont servi à estimer le fardeau. Le concept est semblable aux années de vie ajustées en fonction de l’incapacité qui ont servi aux études sur le fardeau mondial de la maladie. Les sources de données sur les maladies mentales et les toxicomanies utilisées étaient notamment des données administratives sur la santé de la province de l’Ontario, des données d’enquête de Statistique Canada et du Centre de toxicomanie et de santé mentale, des données de l’état civil du Bureau du registraire général de l’Ontario, et des données de l’enquête épidémiologique américaine. Résultats : Les 5 affections dont le fardeau est le plus élevé sont : la dépression majeure, le trouble bipolaire affectif, les troubles liés à l’utilisation d’alcool (TUA), la phobie sociale, et la schizophrénie. Le fardeau de la dépression est le double de celui de l’affection mentale la plus proche (c’est-à-dire, le trouble bipolaire affectif) et est plus lourd que le fardeau combiné des 4 cancers les plus répandus en Ontario. Les TUA étaient le seul groupe de maladies dont une proportion substantielle du fardeau était attribuable au décès précoce. Les estimations du fardeau pour les autres affections étaient principalement attribuables à l’incapacité. Conclusions : Le fardeau de ces affections en Ontario est aussi plus lourd que celui d’autres affections, comme le cancer et les maladies infectieuses, ce qui s’explique en grande partie par la prévalence élevée, la chronicité, et l’âge de début de la plupart des troubles mentaux et des problèmes de toxicomanie. Les résultats servent de base importante à l’évaluation future des
The Windsor, Ontario Exposure Assessment Study evaluated the contribution of ambient air pollutants to personal and indoor exposures of adults and asthmatic children living in Windsor, Ontario, Canada. In addition, the role of personal, indoor, and outdoor air pollution exposures...
Parkway公司和Hamilton sundstrand公司在墨西哥合资成立Parkway-HS公司
无
2009-01-01
Parkway制品公司（Parkway Products Inc．）和Hamilton sundstrand公司共同出资成立了一家名为Parkway-HSL．L．C．的新公司，专门生产低成本的航空航天产品。该公司的工厂位于墨西哥的萨尔提略市，占地面积超过2300m2。
2016-05-01
Algorithm for Overcoming the Curse of Dimensionality for Certain Non-convex Hamilton-Jacobi Equations, Projections and Differential Games Yat Tin...complexity of the resulting algorithm is polynomial in the problem dimension; hence, it overcomes the curse of dimensionality [1, 2]. We extend previous work...compute the evolution of geometric objects [25], which was first used for reachability problems in [21, 22] to our knowledge . Numerical solutions to HJ PDE
李仁杰; 乔永芬; 刘洋
2002-01-01
We present a general approach to the construction of conservation laws for variable mass nonholonomic noncon-servative systems. First, we give the definition of integrating factors, and we study in detail the necessary conditionsfor the existence of the conserved quantities. Then, we establish the conservation theorem and its inverse theorem forHamilton's canonical equations of motion of variable mass nonholonomic nonconservative dynamical systems. Finally,we give an example to illustrate the application of the results.
Competency assessment of microbiology medical laboratory technologists in Ontario, Canada.
Desjardins, Marc; Fleming, Christine Ann
2014-08-01
Accreditation in Ontario, Canada, requires that licensed clinical laboratories participate in external quality assessment (also known as proficiency testing) and perform competency evaluation of their staff. To assess the extent of ongoing competency assessment practices, the Quality Management Program--Laboratory Services (QMP-LS) Microbiology Committee surveyed all 112 licensed Ontario microbiology laboratories. The questionnaire consisted of a total of 21 questions that included yes/no, multiple-choice, and short-answer formats. Participants were asked to provide information about existing programs, the frequency of testing, what areas are evaluated, and how results are communicated to the staff. Of the 111 responding laboratories, 6 indicated they did not have a formal evaluation program since they perform only limited bacteriology testing. Of the remaining 105 respondents, 87% perform evaluations at least annually or every 2 years, and 61% include any test or task performed, whereas 16% and 10% focus only on problem areas and high-volume complex tasks, respectively. The most common methods of evaluation were review of external quality assessment (EQA) challenges, direct observation, and worksheet review. With the exception of one participant, all communicate results to staff, and most take remedial action to correct the deficiencies. Although most accredited laboratories have a program to assess the ongoing competency of their staff, the methods used are not standardized or consistently applied, indicating that there is room for improvement. The survey successfully highlighted potential areas for improvement and allowed the QMP-LS Microbiology Committee to provide guidance to Ontario laboratories for establishing or improving existing microbiology-specific competency assessment programs.
Deepwater sculpin status and recovery in Lake Ontario
Weidel, Brian C.; Walsh, Maureen; Connerton, Michael J.; Lantry, Brian F.; Lantry, Jana R.; Holden, Jeremy P.; Yuille, Michael J.; Hoyle, James A.
2017-01-01
Deepwater sculpin are important in oligotrophic lakes as one of the few fishes that use deep profundal habitats and link invertebrates in those habitats to piscivores. In Lake Ontario the species was once abundant, however drastic declines in the mid-1900s led some to suggest the species had been extirpated and ultimately led Canadian and U.S. agencies to elevate the species' conservation status. Following two decades of surveys with no captures, deepwater sculpin were first caught in low numbers in 1996 and by the early 2000s there were indications of population recovery. We updated the status of Lake Ontario deepwater sculpin through 2016 to inform resource management and conservation. Our data set was comprised of 8431 bottom trawls sampled from 1996 to 2016, in U.S. and Canadian waters spanning depths from 5 to 225 m. Annual density estimates generally increased from 1996 through 2016, and an exponential model estimated the rate of population increase was ~ 59% per year. The mean total length and the proportion of fish greater than the estimated length at maturation (~ 116 mm) generally increased until a peak in 2013. In addition, the mean length of all deepwater sculpin captured in a trawl significantly increased with depth. Across all years examined, deepwater sculpin densities generally increased with depth, increasing sharply at depths > 150 m. Bottom trawl observations suggest the Lake Ontario deepwater sculpin population has recovered and current densities and biomass densities may now be similar to the other Great Lakes.
Stephen A. Royle
2016-06-01
Full Text Available This article deals with the encounters between a traditional Korean rural and island population and western military forces when the British navy occupied Geomundo, an archipelago known to them as Port Hamilton, for 22 months between 1885 and 1887. The paper first outlines the sometimes painful process of East Asian countries being opened up to trade and outside influences in the 19th century, a process sometimes urged upon them by naval weapons in this era of gunboat diplomacy. This provides the setting for the Port Hamilton Affair itself when in preparation for possible war with Russia, a British naval squadron steamed into Port Hamilton and took it without reference to the local people or their national government. After brief reference to the political consequences of this action, the focus is then on what the records from the occupation and earlier investigations by the British, who had long coveted the islands’ strategic harbour, reveal about the life of the islanders. The article considers both their traditional life, from a time rather before western travel accounts were written about the Korean mainland, and how the islanders fared under the British.
Nongastrointestinal helminths in marten (Martes americana) from Ontario, Canada.
Seville, R S; Addison, E M
1995-10-01
Six species of nongastrointestinal nematodes were recovered from 405 marten, (Martes americana), examined from six areas in Ontario, Canada in 1992 to 1993. Three species (Crenosoma petrowi, Eucoleus aerophilus, Filaroides martis) were found in the respiratory tract, one in the urinary bladder (Pearsonema plica), one in the kidney (Dioctophyme renale), and one in the musculature (Trichinella sp. larvae). This is the first report of F. martis and P. plica from this host. In addition a specimen of Dracunculus insignis collected from a marten pelt was received. Based on our results, martens are primary definitive hosts for few nongastrointestinal nematodes. Animals in more southern areas had greater species richness than those from higher latitudes.
The identification of liquid ethane in Titan's Ontario Lacus.
Brown, R H; Soderblom, L A; Soderblom, J M; Clark, R N; Jaumann, R; Barnes, J W; Sotin, C; Buratti, B; Baines, K H; Nicholson, P D
2008-07-31
Titan was once thought to have global oceans of light hydrocarbons on its surface, but after 40 close flybys of Titan by the Cassini spacecraft, it has become clear that no such oceans exist. There are, however, features similar to terrestrial lakes and seas, and widespread evidence for fluvial erosion, presumably driven by precipitation of liquid methane from Titan's dense, nitrogen-dominated atmosphere. Here we report infrared spectroscopic data, obtained by the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft, that strongly indicate that ethane, probably in liquid solution with methane, nitrogen and other low-molecular-mass hydrocarbons, is contained within Titan's Ontario Lacus.
Direct cost associated with acquired brain injury in Ontario
Chen Amy
2012-08-01
Full Text Available Abstract Background Acquired Brain Injury (ABI from traumatic and non traumatic causes is a leading cause of disability worldwide yet there is limited research summarizing the health system economic burden associated with ABI. The objective of this study was to determine the direct cost of publicly funded health care services from the initial hospitalization to three years post-injury for individuals with traumatic (TBI and non-traumatic brain injury (nTBI in Ontario Canada. Methods A population-based cohort of patients discharged from acute hospital with an ABI code in any diagnosis position in 2004 through 2007 in Ontario was identified from administrative data. Publicly funded health care utilization was obtained from several Ontario administrative healthcare databases. Patients were stratified according to traumatic and non-traumatic causes of brain injury and whether or not they were discharged to an inpatient rehabilitation center. Health system costs were calculated across a continuum of institutional and community settings for up to three years after initial discharge. The continuum of settings included acute care emergency departments inpatient rehabilitation (IR complex continuing care home care services and physician visits. All costs were calculated retrospectively assuming the government payer’s perspective. Results Direct medical costs in an ABI population are substantial with mean cost in the first year post-injury per TBI and nTBI patient being $32132 and $38018 respectively. Among both TBI and nTBI patients those discharged to IR had significantly higher treatment costs than those not discharged to IR across all institutional and community settings. This tendency remained during the entire three-year follow-up period. Annual medical costs of patients hospitalized with a brain injury in Ontario in the first follow-up year were approximately $120.7 million for TBI and $368.7 million for nTBI. Acute care cost accounted for 46
Re Inquiry into the Confidentiality of Health Records in Ontario.
1978-06-30
Several members of the Royal Canadian Mounted Police testified at hearings conducted by a commission appointed to study the confidentiality of health records. On approximately 300 occasions, the police had obtained medical information from physicians and hospitals in Ontario without the prior consent of the patient. The court established that the identity of persons who had furnished the information was privileged information for physicians and other persons subject to the control of a hospital board, but not for various employees of the hospital who were not subject to professional standards of discipline.
Ontario Universities Benefits Survey, 1987-88. Part I: Benefits Excluding Pensions.
University of Western Ontario, London.
Results of the 1987-1988 survey of benefits, excluding pensions, for 17 Ontario, Canada, universities are presented. Information is provided on the following areas: administration and insurance plans, communication of benefits, proposed changes in benefits, provision of life and dismemberment insurance, maternity leave policy, Ontario health…
The Social Habitus of Drama: The Ontario Drama Curriculum in Theory and Practice
Gallagher, Kathleen
2016-01-01
In this article, the author considers the place of drama in the formal curriculum in Ontario, Canada by considering its position in relation to curriculum theory and the texts that formally articulate it as a discipline to be taught in schools. The drama curriculum in Ontario aims to engage young people in activities and experiences that invite…
Endoscopic Follow-Up of Positive Fecal Occult Blood Testing in the Ontario FOBT Project
Lawrence Paszat
2007-01-01
Full Text Available BACKGROUND: The Ontario FOBT Project is a pilot study of fecal occult blood testing (FOBT for colorectal cancer screening conducted among age-eligible volunteers (50 to 75 years in 12 of 37 public health regions in Ontario.
Walsh, Christine; MacMillan, Harriet L.; Jamieson, Ellen
2003-01-01
Objective: This study examined the relationship between reported exposure to child abuse and a history of parental substance abuse (alcohol and drugs) in a community sample in Ontario, Canada. Method: The sample consisted of 8,472 respondents to the Ontario Mental Health Supplement (OHSUP), a comprehensive population survey of mental health. The…
Did Ontario's Zero Tolerance & Graduated Licensing Law Reduce Youth Drunk Driving?
Carpenter, Christopher
2006-01-01
On April 1, 1994, Ontario, Canada, instituted a new graduated driver license (GDL) system that effectively set the legal blood alcohol content (BAC) threshold at zero for the first few years of a youth's driving eligibility. I use data from the 1983-2001 Ontario Student Drug Use Surveys (OSDUS) to examine whether the Zero Tolerance (ZT) policy…
Bologna through Ontario Eyes: The Case of the Advanced Diploma in Architectural Technology
Mitchell, Amy D.; Feltham, Mark; Trotter, Lane
2015-01-01
Inspired by Ontario's burgeoning interest in postsecondary student mobility, this article examines how elements of Europe's Bologna Process can help bridge the college--university divide of Ontario's postsecondary system. Via discourse analysis of relevant qualification frameworks and program standards, it argues that the current system…
Murray E. Woods; Donald C. E. Robinson
2008-01-01
The Ontario Ministry of Natural Resources is leading a government-industry partnership to develop an Ontario variant of the Forest Vegetation Simulator (FVS). Based on the Lake States variant and the PrognosisBC user-interface, the FVSOntarioproject is motivated by a need to model the impacts of intensive forest management...
O'Gorman, Laurel D; Hogenbirk, John C
2016-04-01
The Ontario Telemedicine Network (OTN) uses technology to help make medical services more accessible to people in medically underserved rural and remote parts of Ontario, Canada. We examined access to OTN-enabled health and medical services in Northern Ontario, which has 775,000 people in communities scattered across an area of 803,000 km(2). We used ArcGIS Network Analyst (Esri, Redlands, CA) to conduct a service area analysis with travel time as a measure of potential access to care. We used road distance and speed limits to estimate travel time between Northern Ontario communities and the nearest OTN unit. In 2014 there were 2,331 OTN units, of which 552 (24%) were located in Northern Ontario. All seven communities in Northern Ontario with a population of 10,000 or greater had OTN units. Almost 97% of the 59 communities with 1,000-10,000 people were within 30 min of an OTN unit. The percentage of communities within 30 min steadily decreased with decreasing population size, to 58% for communities with fewer than 50 people. In total, 86% (690/802) of Northern Ontario communities were within an hour's drive of an OTN unit. This study showed that most Northern Ontario communities were within an hour's drive of an OTN unit. The current distribution of OTN units has the potential to increase access to medical services and to reduce the need for medically related travel for residents of these communities.
Choi, Stephanie KY; Boyle, Eleanor; Burchell, Ann;
2015-01-01
of current depression in HIV-positive patients attending HIV specialty care clinics in Ontario. Methods A multi-centre validation study was conducted in Ontario to examine the validity and accuracy of three instruments (the Center for Epidemiologic Depression Scale [CESD20], the Kessler Psychological...... Distress Scale [K10], and the Patient Health Questionnaire depression scale [PHQ9]) and their short forms (CESD10, K6, and PHQ2) in diagnosing current major depression among 190 HIV-positive patients in Ontario. Results from the three instruments and their short forms were compared to results from the gold...... positive predictive value (0.49–0.58) at their optimal cut-points. Conclusion Among people in HIV care in Ontario, Canada, the three instruments and their short forms performed equally well and accurately. When further in-depth assessments become available, shorter instruments might find greater clinical...
Factors associated with seat belt use: an evaluation from the Ontario Health Survey.
Sahai, V S; Pitblado, J R; Bota, G W; Rowe, B H
1998-01-01
This study examines the factors associated with seat belt use for drivers and passengers in Ontario. Using the 1990 Ontario Health Survey, a population-based survey of non-institutionalized Ontario residents, factors associated with seat belt use among drivers and passengers were identified and are reported as unadjusted and adjusted odds ratios (OR; 95% CI). Seat belt non-use in Ontario drivers was most strongly associated with younger age (p Seat belt non-use in passengers was associated with younger age (p seat belt use has been shown to reduce injuries in the event of a crash. Any strategy to increase seat belt use in Ontario should be targeted to involve both drivers and passengers. Attention should be paid to increasing seat belt usage by younger adults, males, and especially those living in northern and rural regions.
46 CFR 401.405 - Basic rates and charges on the St. Lawrence River and Lake Ontario.
2010-10-01
... Lake Ontario. 401.405 Section 401.405 Shipping COAST GUARD (GREAT LAKES PILOTAGE), DEPARTMENT OF... § 401.405 Basic rates and charges on the St. Lawrence River and Lake Ontario. Except as provided in.... registered pilots in the St. Lawrence River and Lake Ontario. (a) Area 1 (Designated Waters): Service...
Potoglou, Dimitrios
The focus of this thesis is twofold. First, it offers insight on how households' car-ownership behaviour is affected by urban form and availability of local-transit at the place of residence, after controlling for socio-economic and demographic characteristics. Second, it addresses the importance of vehicle attributes, household and individual characteristics as well as economic incentives and urban form to potential demand for alternative fuelled vehicles. Data for the empirical analyses of the aforementioned research activities were obtained through an innovative Internet survey, which is also documented in this thesis, conducted in the Census Metropolitan Area of Hamilton. The survey included a retrospective questionnaire of households' number and type of vehicles and a stated choices experiment for assessing the potential demand for alternative fuelled vehicles. Established approaches and emerging trends in automobile demand modelling identified early on in this thesis suggest a disaggregate approach and specifically, the estimation of discrete choice models both for explaining car ownership and vehicle-type choice behaviour. It is shown that mixed and diverse land uses as well as short distances between home and work are likely to decrease the probability of households to own a large number of cars. Regarding the demand for alternative fuelled vehicles, while vehicle attributes are particularly important, incentives such as free parking and access to high occupancy vehicle lanes will not influence the choice of hybrids or alternative fuelled vehicles. An improved understating of households' behaviour regarding the number of cars as well as the factors and trade-offs for choosing cleaner vehicles can be used to inform policy designed to reduce car ownership levels and encourage adoption of cleaner vehicle technologies in urban areas. Finally, the Internet survey sets the ground for further research on implementation and evaluation of this data collection method.
Clinical utility of the Snaith-Hamilton-Pleasure scale in the Chinese settings
Liu Wen-hua
2012-10-01
Full Text Available Abstract Background The Snaith-Hamilton-Pleasure-Scale (SHAPS is a self-reported scale evaluating anhedonia for neuropsychiatric disorders. It has demonstrated with impressive psychometric properties and advantages in its applicability over other similar instruments. However, very few studies have been conducted to examine the clinical utility of the SHAPS in the context of Chinese settings. The current study aimed to examine the clinical utility of the translated version of the SHAPS in the Chinese clinical settings. Methods A Chinese version of SHAPS was administered to 336 college students to examine the internal consistency and test-retest reliability at a 4-week interval. Moreover, the translated SHAPS was also administered to 141 patients with major depression, 72 patients with schizophrenia, and 72 healthy controls to examine its clinical discrimination. Results The internal consistency of the SHAPS for the non-clinical sample and test-retest reliability at a 4- week interval were 0.85 and 0.64, respectively. Moreover, the SHAPS also showed an excellent internal consistency (alpha was 0.93 and a one-factor solution with the first factor accounted for 51.53% of the variance in the clinical psychiatric samples. ANOVA of the SHAPS total score indicated that the patients with depression scored significantly more anhedonia than the patients with schizophrenia and healthy controls (p Conclusions These findings suggest that the Chinese version of the SHAPS is a useful and promising instrument in assessing anhedonia for clinical patients and non-clinical individuals in the Chinese settings.
Poerschmann, J; Parsi, Z; Gorecki, T
2008-04-04
Analytical pyrolysis of sediments contaminated with pollutants of medium to high molecular weights (up to approximately 500 Da) is very challenging when using conventional pyrolysis systems due to discrimination of high molecular weight analytes. In the framework of this contribution, non-discriminating pyrolysis and thermochemolysis using rapid heating in a Silcosteel capillary were applied to study organic pollutants in heavily contaminated sediments taken from the Hamilton Harbor. The novel pyrolysis approach, requiring very small amounts of sample, turned out to be very useful as a rapid screening method, e.g. for risk assessment studies, proving superior to commonly used solvent extraction. Main pollutants in the sediments under study included aromatic hydrocarbons, chiefly originating from coal tar and petroleum. Polycyclic aromatic hydrocarbons (PAHs) beyond six-rings, including coronene and truxene, could be detected. Sequential tetramethyl ammonium hydroxide-induced thermochemolysis performed at 500 and 750 degrees C enabled the differentiation between organic pollutants sorbed onto the sediment matrix on the one hand, and structural moieties of the condensed polymeric humic sediment matrix along with bound residues on the other hand. Thermochemolysis at 500 degrees C removed sorbates quantitatively, leaving only bare polymeric humic matrix. Significant PAH source indicators provided evidence that the lipidic fraction sorbed onto the sediments originated from PAHs formed chiefly in coal combustion processes. The polymeric humic organic matter network of the less polluted sediment was mainly of petrogenic origin, whereas black carbon, kerogen, etc. contributed to the organic carbon of the heavily polluted sediment. Thermochemolysis at 500 degrees C was also used to study fatty acid profiles of the sediments. The fatty acid methyl ester patterns obtained for the two sites under study differed significantly, with strong indications that microbial attenuation
The Hamilton Rating Scale for Depression: A meta-analytic reliability generalization study
José A. López-Pina
2009-01-01
Full Text Available La generalización de la fiabilidad es una aproximación meta-analítica para estudiar cómo las estimaciones de la fiabilidad a partir de las puntuaciones de los tests dependen de las características específicas en las que el test se aplica y, en consecuencia, el riesgo de inducir la fiabilidad de las puntuaciones a partir de aplicaciones previas del test. La Escala de Evaluación de la Depresión de Hamilton (HAM-D, por su nombre en inglés es uno de los instrumentos de medida más populares de la psicología clínica para evaluar los síntomas depresivos y de la que se han construido algunas versiones. El presente estudio meta-analítico es un estudio de generalización de la fiabilidad (GF para probar la heterogeneidad de las estimaciones de la fiabilidad a través de los estudios, examinar la influencia de distintas características y compara los resultados con los obtenidos en estudios previos de GF en otras escalas de depresión. Los análisis llevados a cabo con 35 coeficientes alfa obtenidos a partir de 23 estudios publicados mostraron una fiabilidad media de 0,79 (DT = 0,14, elevada heterogeneidad a través de los estudios y que algunas características de los estudios influyeron en la fiabilidad de las puntuaciones, principalmente el número de ítems, la variabilidad de las puntuaciones y el tipo de trastorno estudiado en la muestra. Además, se discuten las implicaciones para investigadores y clínicos cuando se utiliza la escala HAM-D.
Regulating Traditional Chinese Medicine Practitioners and Acupuncturists in Ontario, Canada
Glen E. Randall
2015-12-01
Full Text Available In 2006, the Ontario government passed the Traditional Chinese Medicine Act, which granted Traditional Chinese Medicine practitioners and Acupuncturists (TCM/A practitioners self-regulatory status under the Regulated Health Professions Act, 1991. The goal of the legislation was to create a new regulatory college that would set and enforce high standards of care and safety in order to enhance public protection and access to a range of traditional and alternative therapies. In April 2013, the College of Traditional Chinese Medicine Practitioners and Acupuncturists of Ontario was officially launched. Several factors account for the government’s decision to delegate self-regulatory authority to TCM/A practitioners through the creation of a regulatory college. In particular, the government’s decision seems to have been influenced by lobbying of some practitioners, greater public acceptance of alternative medicines, patient safety concerns related to acupuncture cases in the media, and the precedence of self-regulatory status being granted to these practitioners in other provinces. The degree to which the legislation has achieved its goals is difficult to determine given the short period of time the regulatory college has existed. However, the fact that the college has developed standards of practice to guide TCM/A practitioners and has a process in place to address public complaints is an early indication of movement toward achieving the policy’s goals.
Linezolid resistance in Enterococcus faecium isolated in Ontario, Canada.
Patel, Samir N; Memari, Nader; Shahinas, Dea; Toye, Baldwin; Jamieson, Frances B; Farrell, David J
2013-12-01
Recent studies have described linezolid-resistant MRSA and vancomycin-resistant enterococci (VRE) occurring worldwide, including an outbreak of linezolid-resistant MRSA. The objective of this study was to determine if linezolid-resistant enterococci are present in clinical isolates in Ontario, Canada. From January 2010 to June 2012, all enterococcal isolates submitted to the Public Health Ontario Laboratory (PHOL) for confirmation of VRE and susceptibility testing were included in this study. Of 2829 enterococcal isolates tested, 12 Enterococcus faecium were found to be resistant to linezolid. All linezolid-resistant isolates were also resistant to ampicillin, ciprofloxacin, and vancomycin. In addition, 33% of isolates were non-susceptible to daptomycin, whereas 41% were resistant to quinupristin/dalfopristin. Molecular characterization of these isolates showed that 8/12 isolates (66.7%) contained the mutation G2576T in 23S rRNA, which has been associated with linezolid resistance. Amplification and sequencing of L3- and L4-coding genes did not reveal mutations associated with linezolid resistance. One isolate contained the cfr gene, which is associated with linezolid resistance, and has been found in staphylococcal species and E. faecalis. These data show that occurrence of linezolid resistance is still rare among enterococcal isolates referred to PHOL though detection of cfr in E. faecium is concerning as it has the potential to disseminate among other enterococci.
Concentration and biochemical gradients of seston in Lake Ontario
Kelly, Patrick T.; Weidel, Brian C.; Paufve, Matthew R.; O'Malley, Brian P.; Watkins, James M.; Rudstam, Lars G.; Jones, Stuart E.
2017-01-01
Spatial variability in resource quantity and quality may have important implications for the distribution and productivity of primary consumers. In Lake Ontario, ecosystem characteristics suggest the potential for significant spatial heterogeneity in seston quantity and quality, particularly due to the potential for nearshore-offshore gradients in allochthonous nutrient supply, and the formation of a deep chlorophyll layer (DCL) in July. We assessed total and zooplankton food particle size-fractionated chlorophyll a concentrations, as well as carbon-to-phosphorus stoichiometry and essential fatty acid composition of seston across a distance-from-shore and depth transect. We observed time, sampling depth, and distance from shore to be the best predictors of chlorophyll a concentration. Resource quality was much more homogenous in space, but there were strong patterns through time, as both stoichiometric and fatty acid qualities in general were greatest in May, and lowest in July/August. We did observe a peak in essential fatty acid concentration near the DCL in during time of formation, possibly due to differences in phytoplankton community composition between the DCL and epilimnion. These results suggest the potential for a spatially and temporally dynamic resource base for consumers in Lake Ontario, which may be important in developing a broader understanding of variable consumer productivity.
Introducing Midwifery-led Birth Centres to Ontario
Cristina A. Mattison
2015-03-01
Full Text Available In Ontario, maternal health systems are changing, with an increasing variety of childbirth options being offered to low-risk pregnant women. Midwifery became a regulated profession in the province in 1994: providing primary care throughout pregnancy, labour and for up to six weeks postpartum. Currently there are three midwifery-led birth centres operating in Ontario, two of which opened in early 2014. The Ministry of Health and Long-Term Care (MoHLTC has launched these new birth centres in order to offer women more choice in health care provider and birth setting. This shift is representative of the MoHLTC’s push to move services out of hospitals and into community-based settings. While the birth centre initiative is in its early stages and a formal program evaluation is needed, it has the potential, if scaled up, to decrease the need for hospital beds as well as reduce health care costs through more appropriate care for low-risk pregnancies, leading to fewer interventions.
Expanding the Scope of Practice for Pharmacists in Ontario
Glen Edward Randall
2015-04-01
Full Text Available On 15 December 2009 the Regulated Health Professions Statute Law Amendment Act, 2009 (Bill 179 received Royal Assent in Ontario. The resulting legislative amendments were intended to strengthen government oversight of the health regulatory colleges, promote interprofessional collaboration, and make better use of health professionals’ existing skills and training by enhancing the scope of practice for several health professions in order to improve health system efficiency. Among the most notable scope of practice enhancements were those given to pharmacists, who would be permitted to: modify and renew existing prescriptions, prescribe a limited range of drugs independent of a physician, and administer medications such as vaccinations via injection or inhalation. The reform was driven in large part by the government’s concerns related to the rising cost of health care, the public’s desire for greater access to services, and demonstrated successes of similar reforms in other jurisdictions. While the Ontario reform has had some clear success, such as expanding the public’s access to influenza vaccinations, to date, the evidence of achieving other goals remains weak. In particular, there is no clear evidence of improved health system efficiency and associated cost effectiveness. Moreover, it is possible that Ontario’s umbrella regulatory model may be making interprofessional collaboration more, rather than less, difficult to realize.
Degrees of change: Steps towards an Ontario global warming strategy
Spivak, M.; Jessup, P.; Lourie, B.; Macdonald, M.; Makuch, Z.; Valiante, M.; Warner, B.
1991-06-01
The measures and policy strategies that would be required to achieve a 20% reduction in Ontario carbon dioxide emissions by 2005 are explored. Estimates of primary and secondary energy use and CO{sub 2} emissions for 1988 and 2005 are presented, and three strategies are examined in each end-use sector: energy efficiency, fuel switching, and renewable energy measures. For the residential, commercial, transport, industrial, and iron/steel industry sectors, a profile of CO{sub 2} emissions and energy intensity trends is offered, opportunities for CO{sub 2} reduction and measures to reduce CO{sub 2} emissions are described, and the economic and social implications are discussed. Natural gas cogeneration is examined as a technological option for reducing CO{sub 2} emissions and creating important opportunities for the Ontario economy. The role of energy utility reform in CO{sub 2} emissions reduction is assessed in an examination of the key factors needed for the design and implementation of demand side management programs that achieve high participation rates and significant reductions in energy demand. 102 refs., 6 figs., 53 tabs.
Tobacco Retail Outlets and Vulnerable Populations in Ontario, Canada
Michael O. Chaiton
2013-12-01
Full Text Available Interest has been increasing in regulating the location and number of tobacco vendors as part of a comprehensive tobacco control program. The objective of this paper is to examine the distribution of tobacco outlets in a large jurisdiction, to assess: (1 whether tobacco outlets are more likely to be located in vulnerable areas; and (2 what proportion of tobacco outlets are located close to schools. Retail locations across the Province of Ontario from Ministry of Health Promotion data were linked to 2006 Census data at the neighbourhood level. There was one tobacco retail outlet for every 1,000 people over age 15 in Ontario. Density of outlets varied by public health unit, and was associated with the number of smokers. Tobacco outlets were more likely to be located in areas that had high neighbourhood deprivation, in both rural and urban areas. Outlets were less likely to be located in areas with high immigrant populations in urban areas, with the reverse being true for rural areas. Overall, 65% of tobacco retailers were located within 500 m of a school. The sale of tobacco products is ubiquitous, however, neighbourhoods with lower socio-economic status are more likely to have easier availability of tobacco products and most retailers are located within walking distance of a school. The results suggest the importance of policies to regulate the location of tobacco retail outlets.
Introducing Midwifery-led Birth Centres to Ontario
Cristina A. Mattison
2015-03-01
Full Text Available In Ontario, maternal health systems are changing, with an increasing variety of childbirth options being offered to low-risk pregnant women. Midwifery became a regulated profession in the province in 1994: providing primary care throughout pregnancy, labour and for up to six weeks postpartum. Currently there are three midwifery-led birth centres operating in Ontario, two of which opened in early 2014. The Ministry of Health and Long-Term Care (MoHLTC has launched these new birth centres in order to offer women more choice in health care provider and birth setting. This shift is representative of the MoHLTC’s push to move services out of hospitals and into community-based settings. While the birth centre initiative is in its early stages and a formal program evaluation is needed, it has the potential, if scaled up, to decrease the need for hospital beds as well as reduce health care costs through more appropriate care for low-risk pregnancies, leading to fewer interventions.
The appropriateness and persistence of testosterone replacement therapy in Ontario.
Martins, Diana; Yao, Zhan; Tadrous, Mina; Shah, Baiju R; Juurlink, David N; Mamdani, Muhammad M; Gomes, Tara
2017-02-01
To examine the concordance between testosterone replacement therapy (TRT) use and established reimbursement criteria, as well as compare the persistence of use among available formulations (injectable, oral, topical gel, transdermal patch) among elderly men in Ontario, Canada. We conducted a retrospective cohort study of men aged 66 years or older in Ontario newly treated with testosterone between 1 January 2009 and 31 December 2012 using linked health administrative data. Continuous use was defined on the basis of prescription refills issued within 180 days of the preceding prescription. We studied men who received at least two consecutive TRT prescriptions. We estimated the prevalence of hypogonadism, human immunodeficiency virus, specialist visits and lab tests for serum testosterone prior to initiation of TRT to investigate concordance with prescribing criteria. We also performed a Kaplan-Meier analysis to test for differences in the median time to discontinuation among formulations. Among the 4797 men who received at least two TRT prescriptions, only 38.7% met the reimbursement criteria for use prior to initiating therapy. The median time to discontinuation differed significantly among formulations and was longest among recipients of oral TRT products (383 days), and lower for recipients of topical gels (319 days), injectable (283 days) and transdermal patches (160 days; Log-rank test p therapy, and many discontinue TRT within a year of initiation. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.
Eyles, Nick; Doughty, Mike
2016-06-01
An extensive tract of glacially-streamlined terrain across a large part of Southern Ontario, Canada, is recognized as the footprint of the paleo-Ontario Ice Stream (OIS) within the easternmost Great Lakes sector of the last Laurentide Ice Sheet. The upstream part is a drumlinized and megagrooved 'hard bed' underlain by Cambro-Ordovician carbonates and sandstones. Subglacial plucking of jointed limestone on the lateral margins of drumlinized escarpment interfluves and rock drumlins generated a large flux of coarse debris within the ice base, recorded by sporadic spreads of hummocky rubble moraine. Downstream, the hard bed passes underneath a streamlined 'soft' bed of till-cored ('drift') drumlins and megaridges of the classic Peterborough and New York State drumlin fields. The boundary between the two bed types is a ~ 10 km wide 'mixed bed' of isolated drift drumlins resting on drumlinized rock suggesting a common erosional origin. Spatial variation in the geomorphology of ~ 2500 drift drumlins, indicates that megaridges are clones resulting from the erosion and dissection of larger parent drumlins. A large moraine system may mark the final collapse and melt of the ice stream, accompanying abrupt flow switching of its margin.
Arthur Kummer
2010-08-01
Full Text Available Anxiety is common in Parkinson's disease (PD, but studies concerning specific anxiety disorders are scarce. Essential psychometric properties of anxiety rating scales are also lacking. OBJECTIVE: To investigate general anxiety disorder (GAD in PD and psychometric properties of the Hamilton Anxiety Rating Scale (Ham-A. METHOD: Ninety-one PD patients underwent neurological and psychiatric examination, which included the MINI-Plus, the Ham-A and the Hamilton Depression Rating Scale (Ham-D. RESULTS: GAD was present in 30.8% of PD patients. Patients with GAD had longer disease duration (p=0.044 and were in use of higher doses of levodopa (p=0.034. They also tended to have more motor fluctuations and dyskinesias. The group with GAD scored higher in Ham-A (pAnsiedade é comum na doença de Parkinson (DP, mas estudos sobre transtornos de ansiedade específicos são ainda escassos. Faltam também estudos sobre propriedades psicométricas essenciais das escalas de ansiedade. OBJETIVO: Investigar o transtorno de ansiedade generalizada (TAG na DP e propriedades psicométricas da Escala de Ansiedade de Hamilton (Ham-A. MÉTODO: Noventa e um pacientes com DP se submeteram a exames neurológico e psiquiátrico, que incluiu o MINI-Plus, a Ham-A e a Escala de Depressão de Hamilton (Ham-D. RESULTADOS: TAG esteve presente em 30,8% dos participantes. Pacientes com TAG tinham maior duração de doença (p=0,044 e estavam em uso de maiores doses de levodopa (p=0,034. Também havia uma tendência desses pacientes terem mais flutuações motoras e discinesias. O grupo com TAG pontuou mais alto na Ham-A (p<0,001, nas subescalas somática (p<0,001 e psíquica da Ham-A (p<0,001, e na Ham-D (p=0,004. A Ham-A mostrou boa consistência interna (alfa de Cronbach=0,893 e um ponto de corte de 10/11 é sugerido para triar o TAG. CONCLUSÃO: TAG é freqüente na DP e a Ham-A pode ser um instrumento útil para triar esse transtorno.
Is Ontario Hydro for sale? Provincial commission recommends dissolving Utility`s 90-year monopoly
Anon.
1996-06-01
The possible breakup and privatization of Ontario Hydro was discussed, triggered by the recent release of the Macdonald Commission report which found that `there is no longer a sound economic rationale for allowing a large monopoly to dominate the electricity system`. The essence of the Committee`s recommendation was (1) to allow all electricity generators, including out-of-province suppliers to compete on equal terms for Ontario business;, (2) operate Ontario Hydro`s four nuclear generation plants as separate competing entities and keep them in public ownership, (3) provide open non-discriminatory access to Ontario`s transmission system, (4) move responsibility for managing Ontario Hydro`s high-voltage transmission assets to an independent {sup T}ransmission Grid Company`, (5) reduce the number of distribution utilities from the current total of 307, and (6) create community-based organizations to serve remote communities that are not connected to the transmission system. The expectation is that competition will lead to lower energy prices and more choice for consumers. No action from the Ontario government is expected for several months, and not without extensive consultation with the industry and consumers.
The role of transboundary flow on 1995 ozone levels in Ontario, Canada
Yap, D.; Fraser, D.; Kiely, P.; Brou, G. de; Dong, W. [Ontario Ministry of Environmental and Energy, Etobicoke, Ontario (Canada)
1997-12-31
Exceedances of the ozone criterion in Ontario are often widespread and associated with episodes. Here an episode refers to distinct meteorological events in which there is the simultaneous occurrence of widespread (hundreds of kilometers) elevated ozone levels (greater than 80 ppb maximum hourly concentration). An examination of the ozone data for 1995 (based on 45 monitoring sites) indicates that there were 16 such episode days in Ontario. This was slightly higher than the numbers reported in 1992 to 1994. The trend in the number of ozone episode days in Ontario over the past 17 years show the highest frequencies in 1988, 1991 and 1983. Associated air parcel back trajectories on the 16 episode days all show transboundary flows from the neighboring states of the U.S. Typically air parcels traversed regions south-southwest of southwestern Ontario. In 1995 there were, however, a number of episode days with associated southeasterly flows compared to that experienced in previous years. For example, there were about 25 such cases in 1995 compared to 8% in 1991 and none in 1988. On ozone excursion days (exceedances of 124 ppb) in Michigan, transboundary flows were significant and ozone levels in Ontario were generally high. These results support the concept of a common airshed between Ontario and neighboring states and that southern Ontario is located often within the northern edge of the ozone problem area in eastern North America.
Attitudes toward drug prescription rights: a survey of Ontario chiropractors.
Emary, Peter Charles; Stuber, Kent Jason
2015-01-01
Several published surveys have shown that chiropractors are generally split in their opinions regarding the right to prescribe drugs in chiropractic practice. Many of these studies have been limited by low response rates, leaving the generalizability of their findings open to question. The aim of the current study was to ascertain the general attitudes of chiropractors in Ontario, Canada toward the inclusion of drug prescription rights in their scope of practice. Relationships between these attitudes and the number of years in practice including differences in philosophical orientation were also explored. A 14-item questionnaire was developed and invitations sent via e-mail to all eligible 2,677 chiropractors in active practice registered electronically with the College of Chiropractors of Ontario in February 2015. Data were collected and analyzed using descriptive and inferential statistics. 960 questionnaires were completed for a 36 % response rate. The majority of respondents agreed that chiropractors should be permitted to prescribe musculoskeletal medications such as over-the-counter and prescription-based analgesics, anti-inflammatories, and muscle relaxants. Over two-thirds also felt that with limited prescriptive authority chiropractors could help reduce patients' reliance on these types of drugs. Over three-quarters were opposed however to chiropractors having full prescribing rights. The majority indicated they recommend over-the-counter medications to acute and chronic patients to some extent in clinical practice. Nearly two-thirds perceived their knowledge of musculoskeletal medications as high or very high, while a similar proportion perceived their knowledge of drugs for non-musculoskeletal conditions to be low or very low. A majority of respondents felt that further education in pharmacology would be necessary for those in the profession wishing to prescribe medications. More recent graduates and those who espoused a broad scope of chiropractic
Regulating Traditional Chinese Medicine Practitioners and Acupuncturists in Ontario, Canada
Glen E. Randall
2015-12-01
Full Text Available In 2006, the Ontario government passed the Traditional Chinese Medicine Act, which granted Traditional Chinese Medicine practitioners and Acupuncturists (TCM/A practitioners self-regulatory status under the Regulated Health Professions Act, 1991. The goal of the legislation was to create a new regulatory college that would set and enforce high standards of care and safety in order to enhance public protection and access to a range of traditional and alternative therapies. In April 2013, the College of Traditional Chinese Medicine Practitioners and Acupuncturists of Ontario was officially launched. Several factors account for the government’s decision to delegate self-regulatory authority to TCM/A practitioners through the creation of a regulatory college. In particular, the government’s decision seems to have been influenced by lobbying of some practitioners, greater public acceptance of alternative medicines, patient safety concerns related to acupuncture cases in the media, and the precedence of self-regulatory status being granted to these practitioners in other provinces. The degree to which the legislation has achieved its goals is difficult to determine given the short period of time the regulatory college has existed. However, the fact that the college has developed standards of practice to guide TCM/A practitioners and has a process in place to address public complaints is an early indication of movement toward achieving the policy’s goals. Le gouvernement de l'Ontario a fait voter en 2006 la Loi sur les praticiens en médecine traditionnelle chinoise, qui accorde aux praticiens en médecine traditionnelle chinoise et aux acupuncteurs (praticiens en MTC/A le statut de profession autonome dans le cadre la Loi sur les professions de la santé réglementées de 1991. Le but de la Loi était de créer un ordre professionnel capable d'établir et appliquer des normes de qualité et de sécurité des soins, ceci dans le but d
Survey of Neisseria gonorrhoeae Antimicrobial Susceptibility in Ontario
Vivian G Loo
1990-01-01
Full Text Available The minimal inhibitory concentrations (MICs of penicillin, tetracycline, erythromycin, cefoxitin, ceftriaxone and spectinomycin were determined for 300 consecutive strains of Neisseria gonorrhoeae collected from physicians’ offices in Ontario. Only four isolates were found to produce beta-lactamase. Of the remaining 296 isolates, five (1.7% had penicillin MICs greater than or equal to 1 mg/L, 78 (26.3% had tetracycline MICs greater than or equal to 1 mg/L, 13 (4.4% had cefoxitin MICs greater than or equal to 1 mg/L and 43 (14.5% had erythromycin MICs greater than or equal to 1 mg/L. Two isolates (0.7% had high level tetracycline resistance with MICs greater than or equal to 16 mg/L. All N gonorrhoeae isolates were susceptible to ceftriaxone and to spectinomycin.
Drinking, cannabis use and driving among Ontario students.
Adlaf, Edward M; Mann, Robert E; Paglia, Angela
2003-03-04
Little is known about the risk of injury among adolescents who drive after the use of alcohol or cannabis or ride in cars driven by drunk drivers. We examined data from self-administered interviews with 1846 students in grades 7 to 13 who participated in the 2001 Ontario Student Drug Use Survey about their experiences related to alcohol, cannabis and driving during the 12 months preceding the survey. In all, 31.9% of the students reported being a passenger in a car driven by a drunk driver; of the students in grades 10 to 13 who had a driver's licence, 15.1% reported driving within an hour after consuming 2 or more drinks, and 19.7% reported driving within an hour after using cannabis. Our study shows that a sizeable proportion of adolescents are exposed to alcohol- and drug-related driving risks.
Videoconferencing and dietitian services in rural Ontario communities.
Stenlund, Diana
2012-01-01
Registered dietitians (RDs) are regulated health professionals in short supply in Ontario and throughout Canada. Projected workforce studies indicate the situation will likely worsen. Accessing these nutrition specialists is an even greater concern for residents living in rural or remote regions of the province. Smaller communities are increasingly using telehealth as a way to deliver health care services and to improve access to health care professionals. The adoption of interactive videoconferencing as a telehealth application is examined as an alternative approach for accessing RDs in rural communities. While valid reasons exist for implementing videoconferencing, other issues must be considered. These include costs, technological requirements, organizational readiness, and legal and ethical concerns. Future research must fully address the concept of videoconferencing in relation to the Canadian dietetic workforce and practice requirements.
Ângela Maria Alves e Souza; MARIA DE NAZARÉ DE OLIVEIRA FRAGA; LEILA MEMÓRIA PAIVA MORAES; MARIA LÚCIA PINHEIRO GARCIA; KARL DMITRI RAMOS MOURA; PAULO CÉSAR ALMEIDA
2008-01-01
La necesidad de evaluar la asistencia a un grupo de mujeres nos llevó a la aplicación de una escala. Fueron seleccionadas dieciocho usuarias con diagnóstico de trastornos neuróticos, relacionados al estrés y somato formes. Se aplicó la Escala de Evaluación de Ansiedad de Hamilton (HAM-A) con el objetivo de verificar el nivel de ansiedad antes y después de empezar las sesiones grupales. Realizamos 16 sesiones semanales, con desarrollo de técnicas de relajación y arte terapia, y como referencia...
Hossain, M Ilias
2013-01-01
Incorporating Parikh and Wilczek's opinion to the Kerr de-Sitter (KdS) black hole Hawking non-thermal and purely thermal radiations have been investigated using Hamilton-Jacobi method. We have taken the background spacetime of KdS black hole as dynamical, involving the self-gravitation effect of the emitted particles, energy and angular momentum has been taken as conserved and show that the tunneling rate is related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The explored results gives a correction to the Hawking radiation of KdS black hole.
WANG Peng-Zhou; ZHANG Hong-Hao; ZHANG Shun-Li; YAN Wen-Bin; LI Xue-Song
2008-01-01
By using combinatorics, we give a new proof for the recurrence relations of the characteristic polynomial coefficients, and we further obtain an explicit expression for the generic term of the coefficient sequence, which yields the trace formulae of the Cayley-Hamilton's theorem with all coefficients explicitly given. This implies a byproduct, a complete expression for the determinant of any finite-dimensional matrix in terms of the traces of its successive powers.And we discuss some of their applications to chiral perturbation theory and general relativity.
Green tide: indoor marihuana cultivation and its impact on Ontario
NONE
2003-07-01
This paper discusses the apparent proliferation of marihuana grow-ops in Ontario over the last five years. Estimated revenues from indoor marihuana were detailed, as well as estimates of quantities of marihuana produced, forecasted trends and annual and weekly historical trends. The potential economic impact of this criminal activity was examined, with particular reference to increased police activities. The potential for fire and other human health risks included: exposure to mould associated with hydroponic cultivation and growth chemicals and higher concentrations of carbon dioxide and carbon monoxide. The socio-economic impact of grow ops were examined, with detailed estimates of law enforcement costs, insurance costs and costs to the justice system. Societal costs, such as environmental hazards, violence associated with organized crime, and the perceived threat to Ontario's children and communities were also outlined. Costs stemming from hydro theft were cited, including hydro repair and administration. Details of the bypass systems installed for hydro theft were also provided. It was concluded that it was unlikely that grow ops will be entirely eradicated. Measures that may limit the scope of grow ops included: developing avenues to increase effectiveness and efficiency of law enforcement approaches to grow ops, enhancing lines of communication and sharing of intelligence between police and other key stakeholders such as insurance companies, real estate agencies and banks and educating persons in the justice system on the issue of grow ops so that sentencing more accurately reflects the crime. It was recommended that lenient sentencing for marihuana possession and cultivation be re-examined. 70 refs., 12 tabs, 38 figs.
Human exposure to soil contaminants in subarctic Ontario, Canada
Ellen Stephanie Reyes
2015-05-01
Full Text Available Background: Chemical contaminants in the Canadian subarctic present a health risk with exposures primarily occurring via the food consumption. Objective: Characterization of soil contaminants is needed in northern Canada due to increased gardening and agricultural food security initiatives and the presence of known point sources of pollution. Design: A field study was conducted in the western James Bay Region of Ontario, Canada, to examine the concentrations of polychlorinated biphenyls, dichlorodiphenyltrichloroethane and its metabolites (ΣDDT, other organochlorines, and metals/metalloids in potentially contaminated agriculture sites. Methods: Exposure pathways were assessed by comparing the estimated daily intake to acceptable daily intake values. Ninety soil samples were collected at random (grid sampling from 3 plots (A, B, and C in Fort Albany (on the mainland, subarctic Ontario, Canada. The contaminated-soil samples were analysed by gas chromatography with an electron capture detector or inductively coupled plasma mass spectrometer. Results: The range of ΣDDT in 90 soil samples was below the limit of detection to 4.19 mg/kg. From the 3 soil plots analysed, Plot A had the highest ΣDDT mean concentration of 1.12 mg/kg, followed by Plot B and Plot C which had 0.09 and 0.01 mg/kg, respectively. Concentrations of other organic contaminants and metals in the soil samples were below the limit of detection or found in low concentrations in all plots and did not present a human health risk. Conclusions: Exposure analyses showed that the human risk was below regulatory thresholds. However, the ΣDDT concentration in Plot A exceeded soil guidelines set out by the Canadian Council of Ministers of the Environment of 0.7 mg/kg, and thus the land should not be used for agricultural or recreational purposes. Both Plots B and C were below threshold limits, and this land can be used for agricultural purposes.
Ontario's emergency department process improvement program: the experience of implementation.
Rotteau, Leahora; Webster, Fiona; Salkeld, Erin; Hellings, Chelsea; Guttmann, Astrid; Vermeulen, Marian J; Bell, Robert S; Zwarenstein, Merrick; Rowe, Brian H; Nigam, Amit; Schull, Michael J
2015-06-01
In recent years, Lean manufacturing principles have been applied to health care quality improvement efforts to improve wait times. In Ontario, an emergency department (ED) process improvement program based on Lean principles was introduced by the Ministry of Health and Long-Term Care as part of a strategy to reduce ED length of stay (LOS) and to improve patient flow. This article aims to describe the hospital-based teams' experiences during the ED process improvement program implementation and the teams' perceptions of the key factors that influenced the program's success or failure. A qualitative evaluation was conducted based on semistructured interviews with hospital implementation team members, such as team leads, medical leads, and executive sponsors, at 10 purposively selected hospitals in Ontario, Canada. Sites were selected based, in part, on their changes in median ED LOS following the implementation period. A thematic framework approach as used for interviews, and a standard thematic coding framework was developed. Twenty-four interviews were coded and analyzed. The results are organized according to participants' experience and are grouped into four themes that were identified as significantly affecting the implementation experience: local contextual factors, relationship between improvement team and support players, staff engagement, and success and sustainability. The results demonstrate the importance of the context of implementation, establishing strong relationships and communication strategies, and preparing for implementation and sustainability prior to the start of the project. Several key factors were identified as important to the success of the program, such as preparing for implementation, ensuring strong executive support, creation of implementation teams based on the tasks and outcomes of the initiative, and using multiple communication strategies throughout the implementation process. Explicit incorporation of these factors into the
Direct costs of adult traumatic spinal cord injury in Ontario.
Munce, S E P; Wodchis, W P; Guilcher, S J T; Couris, C M; Verrier, M; Fung, K; Craven, B C; Jaglal, S B
2013-01-01
Retrospective economic analysis. To determine the total direct costs of publicly funded health care utilization for the three fiscal years 2003/04 to 2005/06 (1 April 2003 to 31 March 2004 to 1 April 2005 to 31 March 2006), from the time of initial hospitalization to 1 year after initial acute discharge among individuals with traumatic spinal cord injury (SCI). Ontario, Canada. Health system costs were calculated for 559 individuals with traumatic SCI (C1-T12 AIS A-D) for acute inpatient, emergency department, inpatient rehabilitation (that is, short-stay inpatient rehabilitation), complex continuing care (CCC) (i.e., long-stay inpatient rehabilitation), home care services, and physician visits in the year after index hospitalization. All care costs were calculated from the government payer's perspective, the Ontario Ministry of Health and Long-Term Care. Total direct costs of health care utilization in this traumatic SCI population (including the acute care costs of the index event and inpatient readmission in the following year after the index discharge) were substantial: $102 900 per person in 2003/04, $100 476 in 2004/05 and $123 674 in 2005/06 Canadian Dollars (2005 CDN $). The largest cost driver to the health care system was inpatient rehabilitation care. From 2003/04 to 2005/06, the average per person cost of rehabilitation was approximately three times the average per person costs of inpatient acute care. The high costs and long length of stay in inpatient rehabilitation are important system cost drivers, emphasizing the need to evaluate treatment efficacy and subsequent health outcomes in the inpatient rehabilitation setting.
Variability in antibiotic use across Ontario acute care hospitals.
Tan, Charlie; Vermeulen, Marian; Wang, Xuesong; Zvonar, Rosemary; Garber, Gary; Daneman, Nick
2017-02-01
Antibiotic stewardship is a required organizational practice for Canadian acute care hospitals, yet data are scarce regarding the quantity and composition of antibiotic use across facilities. We sought to examine the variability, and risk-adjusted variability, in antibiotic use across acute care hospitals in Ontario, Canada's most populous province. Antibiotic purchasing data from IMS Health, previously demonstrated to correlate strongly with internal antibiotic dispensing data, were acquired for 129 Ontario hospitals from January to December 2014 and linked to patient day (PD) denominator data from administrative datasets. Hospital variation in DDDs/1000 PDs was determined for overall antibiotic use, class-specific use and six practices of clinical or ecological significance. Multivariable risk adjustment for hospital and patient characteristics was used to compare observed versus expected utilization. There was 7.4-fold variability in the quantity of antibiotic use across the 129 acute care hospitals, from 253 to 1873 DDDs/1000 PDs. Variation was evident within hospital subtypes, exceeded that explained by hospital and patient characteristics, and included wide variability in proportion of broad-spectrum antibiotics (IQR 36%-48%), proportion of fluoroquinolones among respiratory antibiotics (IQR 40%-62%), proportion of ciprofloxacin among urinary anti-infectives (IQR 44%-60%), proportion of antibiotics with highest risk for Clostridium difficile (IQR 29%-40%), proportion of 'reserved-use' antibiotics (IQR 0.8%-3.5%) and proportion of anti-pseudomonal antibiotics among antibiotics with Gram-negative coverage (IQR 26%-40%). There is extensive variability in antibiotic use, and risk-adjusted use, across acute care hospitals. This could motivate, focus and benchmark antibiotic stewardship efforts. © The Author 2016. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please email
Simulation of rapid ecological change in Lake Ontario
McKenna, James E.; Chalupnicki, Marc; Dittman, Dawn E.; Watkins, James M.
2017-01-01
Lower trophic level processes are integral to proper functioning of large aquatic ecosystems and have been disturbed in Lake Ontario by various stressors including exotic species. The invasion of benthic habitats by dreissenid mussels has led to systemic changes and native faunal declines. Size-dependent physiological rates, spatial differences and connectivity, competition, and differential population dynamics among invertebrate groups contributed to the change and system complexity. We developed a spatially explicit, individual-based mechanistic model of the benthic ecosystem in Lake Ontario, with coupling to the pelagic system, to examine ecosystem dynamics and effects of dreissenid mussel invasion and native fauna losses. Benthic organisms were represented by functional groups; filter-feeders (i.e., dreissenid mussels), surface deposit-feeders (e.g., native amphipod Diporeia spp.), and deposit-feeders (e.g., oligochaetes and other burrowers). The model was stable, represented ecological structure and function effectively, and reproduced observed effects of the mussel invasion. Two hypotheses for causes of Diporeia loss, competition or disease-like mortality, were tested. Simple competition for food did not explain observed declines in native surface deposit-feeders during the filter-feeder invasion. However, the elevated mortality scenario supports a disease-like cause for loss of the native amphipod, with population changes in various lake areas and altered benthic biomass transfers. Stabilization of mussel populations and possible recovery of the native, surface-deposit feeding amphipod were predicted. Although further research is required on forcing functions, model parameters, and natural conditions, the model provides a valuable tool to help managers understand the benthic system and plan for response to future disruptions.
Nuclear resurrection: Must Ontario fire up more reactors to power its future?
Dewar, E.
2005-06-01
An extensive historical review of Canada's nuclear reactor program is provided. The author also examines the role of nuclear power generation in Ontario's energy future, concluding that given the limited capacity for additional hydro power, and the uncertainty of natural gas supply, nuclear power will likely remain a significant source of energy for Ontario for the foreseeable future. Nevertheless, the challenge to bring nuclear power generation under control remains, considering that despite the best efforts of generations of nuclear engineers, politicians and regulators the industry appears close to being unmanageable, and Ontario taxpayers are likely to be paying its old debt far into the future. The current contingent of reactors is rapidly aging and the disposal of used nuclear fuel still defies a satisfactory solution. These formidable challenges notwithstanding, best estimates are that Ontario has few viable alternatives, and will have to embark on a new cycle of nuclear construction before the end of this decade.
Jennifer A Selby
2013-01-01
.... Instead, I argue that the "Sharia Debate" served as a catalyst for mainstream conservative Muslim groups in Ontario to develop public relations apparatuses that better facilitate the perspectives of everyday religious conservatives in the public sphere.
Neoliberalism and Ontario Teachers’ Unions: A “Not-So” Common Sense Revolution
Duncan MacLellan
2009-05-01
Full Text Available This paper will critically analyze the degree to which the Ontario government, led by then Premier Mike Harris, embarked on a neoliberal agenda that led to a crisis in Ontario’s educational system. The period from 1995-2000 was one of the most contentious in Ontario’s educational history, and two pieces of legislation, The College of Teachers Act (Bill 31 and the Education Quality Improvement Act (Bill 160, pitted teacher unions, in particular, the Ontario Secondary School Teachers’ Federation (OSSTF and the Ontario English Catholic Teachers’ Association (OECTA, against the Harris government. Bill 160 led to a ten-day protest by teachers across Ontario, which signaled a dramatic shift in teacher and state relations that marked a crisis period in Ontario’s educational sector.
Waterfowl breeding population survey: Ontario, Quebec, and New York: May 1996
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for Ontario, Quebec, and New York during 1996. The primary purpose of the survey is to...
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for northern Saskatchewan, northern Manitoba, and western Ontario during 1959. The...
Pilot study: Waterfowl breeding population survey: Ontario, Quebec, and New York: May 1995
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for Ontario, Quebec, and New York during 1995. The primary purpose of the survey is to...
Southern Ontario, Quebec, and New York: Waterfowl breeding population survey: 2000
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for Southern Ontario, Quebec, and New York during 2000. The primary purpose of the survey...
Waterfowl breeding pair survey for western Ontario: May 27 through June 1, 1973
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for western Ontario during 1973. The primary purpose of the survey is to provide...
Waterfowl breeding population survey: New York, Eastern Ontario, and Southern Quebec: 1999
US Fish and Wildlife Service, Department of the Interior — This report summarizes the Waterfowl Breeding Population and Habitat Survey for New York, Eastern Ontario, and Southern Quebec during 1999. The primary purpose of...
Choi, Stephanie KY; Boyle, Eleanor; Burchell, Ann
2015-01-01
Objective Major depression affects up to half of people living with HIV. However, among HIV-positive patients, depression goes unrecognized 60–70% of the time in non-psychiatric settings. We sought to evaluate three screening instruments and their short forms to facilitate the recognition...... of current depression in HIV-positive patients attending HIV specialty care clinics in Ontario. Methods A multi-centre validation study was conducted in Ontario to examine the validity and accuracy of three instruments (the Center for Epidemiologic Depression Scale [CESD20], the Kessler Psychological...... Distress Scale [K10], and the Patient Health Questionnaire depression scale [PHQ9]) and their short forms (CESD10, K6, and PHQ2) in diagnosing current major depression among 190 HIV-positive patients in Ontario. Results from the three instruments and their short forms were compared to results from the gold...
Salisbury, Donald; Renn, Jürgen; Sundermeyer, Kurt
2016-02-01
Classical background independence is reflected in Lagrangian general relativity through covariance under the full diffeomorphism group. We show how this independence can be maintained in a Hamilton-Jacobi approach that does not accord special privilege to any geometric structure. Intrinsic space-time curvature-based coordinates grant equal status to all geometric backgrounds. They play an essential role as a starting point for inequivalent semiclassical quantizations. The scheme calls into question Wheeler’s geometrodynamical approach and the associated Wheeler-DeWitt equation in which 3-metrics are featured geometrical objects. The formalism deals with variables that are manifestly invariant under the full diffeomorphism group. Yet, perhaps paradoxically, the liberty in selecting intrinsic coordinates is precisely as broad as is the original diffeomorphism freedom. We show how various ideas from the past five decades concerning the true degrees of freedom of general relativity can be interpreted in light of this new constrained Hamiltonian description. In particular, we show how the Kuchař multi-fingered time approach can be understood as a means of introducing full four-dimensional diffeomorphism invariants. Every choice of new phase space variables yields new Einstein-Hamilton-Jacobi constraining relations, and corresponding intrinsic Schrödinger equations. We show how to implement this freedom by canonical transformation of the intrinsic Hamiltonian. We also reinterpret and rectify significant work by Dittrich on the construction of “Dirac observables.”
Environmental Factors in an Ontario Community with Disparities in Colorectal Cancer Incidence
Sritharan, Jeavana; Kamaleswaran, Rishikesan; McFarlan, Ken; Lemonde, Manon; George, Clemon; Sanchez, Otto
2014-01-01
Objective: In Ontario, there are significant geographical disparities in colorectal cancer incidence. In particular, the northern region of Timiskaming has the highest incidence of colorectal cancer in Ontario while the southern region of Peel displays the lowest. We aimed to identify non-nutritional modifiable environmental factors in Timiskaming that may be associated with its diverging colorectal cancer incidence rates when compared to Peel. Methods: We performed a systematic review to ide...
Differences in access to services in rural emergency departments of Quebec and Ontario.
Richard Fleet
Full Text Available Rural emergency departments (EDs are important safety nets for the 20% of Canadians who live there. A serious problem in access to health care services in these regions has emerged. However, there are considerable geographic disparities in access to trauma center in Canada. The main objective of this project was to compare access to local 24/7 support services in rural EDs in Quebec and Ontario as well as distances to Levels 1 and 2 trauma centers.Rural EDs were identified through the Canadian Healthcare Association's Guide to Canadian Healthcare Facilities. We selected hospitals with 24/7 ED physician coverage and hospitalization beds that were located in rural communities. There were 26 rural EDs in Quebec and 62 in Ontario meeting these criteria. Data were collected from ministries of health, local health authorities, and ED statistics. Fisher's exact test, the t-test or Wilcoxon-Mann-Whitney test, were performed to compare rural EDs of Quebec and Ontario.All selected EDs of Quebec and Ontario agreed to participate in the study. The number of EDs visits was higher in Quebec than in Ontario (19 322 ± 6 275 vs 13 446 ± 8 056, p = 0.0013. There were no significant differences between Quebec and Ontario's local population and small town population density. Quebec's EDs have better access to advance imaging services such as CT scanner (77% vs 15%, p < .0001 and most the consultant support and ICU (92% vs 31%, p < .0001. Finally, more than 40% of rural EDs in Quebec and Ontario are more than 300 km away from Levels 1 and 2 trauma centers.Considering that Canada has a Universal health care system, the discrepancies between Quebec and Ontario in access to support services are intriguing. A nationwide study is justified to address this issue.
Local Authorities’ contribution on Gastronomy Tourism Development: the case of Ontario, Canada
Karagiannis, Dimitris; METAXAS, Theodore
2017-01-01
The role of Local Government (LG) in achieving tourism development is extremely important. A characteristic example is the province of Ontario in Canada, which managed with the assistance of the Ministries of Tourism and Culture and with the cooperation of the private sector, to create an effective tourism development tool promote the region through its gastronomy - Ontario Culinary Tourism Alliance (OCTA), a non-profit, industry driven organization which leads the implementation of the provi...
Leslie Collins; Deborah McGregor; Stephanie Allen; Craig Murray; Chris Metcalfe
2017-01-01
After the Walkerton tragedy in 2000, where drinking water contamination left seven people dead and many suffering from chronic illness, the Province of Ontario, Canada implemented policies to develop Source Water Protection (SWP) plans. Under the Clean Water Act (2006), thirty-six regional Conservation Authorities were mandated to develop watershed-based SWP plans under 19 Source Protection Regions. Most First Nations in Ontario are outside of these Source Protection Regions and reserve lands...
Prevalence of paratuberculosis in the dairy goat and dairy sheep industries in Ontario, Canada
Bauman, Cathy A.; Jones-Bitton, Andria; Menzies, Paula;
2016-01-01
A cross-sectional study was undertaken (October 2010 to August 2011) to estimate the prevalence of paratuberculosis in the small ruminant dairy industries in Ontario, Canada. Blood and feces were sampled from 580 goats and 397 sheep (lactating and 2 y of age or older) that were randomly selected.......8%) and for dairy sheep was 48.3% (95% PI: 27.6% to 74.3%). These data indicate that a paratuberculosis control program for small ruminants is needed in Ontario....
NONE
1998-12-07
The Ontario Hydro Services Company (OHSC) Inc. filed an application with the Ontario Energy Board (OEB) requesting grant of an order approving the revenue requirements for the Company`s distribution business, including those for distribution in remote communities, for the years 1999 and 2000, up until the point of open access. The revenue requirement for 1999 is $701 million, for the year 2000 it is $640 million. OHSC is a successor company to Ontario Hydro and it will become operational in its new incarnation on April 1, 1999. This marks the beginning of regulation of OHSC`s distribution business by the OEB, following the restructuring the electricity industry in Ontario. Restructuring ended the monopoly position of Ontario Hydro and introduced competition to the generation and retailing sectors, and regulation to the transmission and distribution sectors of the industry. The document sets out the circumstances leading up to the restructuring of the industry, the unbundling of Ontario Hydro into separate generation, transmission and distribution companies, outlines the new regulatory framework and provides the justification for the revenue requirements.
Cancer risk factors and screening in First Nations in Ontario
Maegan V. Mazereeuw
2017-06-01
Full Text Available Introduction: A lack of identifiers in health administrative databases limits our understanding of the cancer burden in First Nations. This study compares cancer risk factors and screening between First Nations in Ontario (on and off reserve and non-Aboriginal Ontarians using two unique health surveys. Methods: We measured age-standardized prevalence estimates using the First Nations Regional Health Survey (RHS Phase 2, 2008/10 (for First Nations on reserve and the Canadian Community Health Survey (CCHS, 2007–2013 (for First Nations off reserve and non-Aboriginal Ontarians. We used prevalence rate ratios (RR and Pearson’s chisquare tests for differences in proportions to compare estimates between First Nations (on and off reserve and non-Aboriginal Ontarians. Results: A higher proportion of First Nation men, women and adolescents on reserve smoked (RR = 1.97, 2.78 and 7.21 respectively and were obese (RR = 1.73, 2.33 and 3.29 respectively compared to their non-Aboriginal counterparts. Similar patterns were observed for First Nations off reserve. Frequent binge drinking was also more prevalent among First Nation men and women living on reserve (RR = 1.28 and 2.22, respectively and off reserve (RR = 1.70 and 1.45, respectively than non-Aboriginal Ontarians. First Nation men and women on reserve were about half as likely to consume fruit at least twice per day and vegetables at least twice per day compared to non-Aboriginal men and women (RR = 0.53 and 0.54, respectively. Pap test uptake was similar across all groups, while First Nation women on reserve were less likely to have had a mammogram in the last five years than non-Aboriginal women (RR = 0.85. Conclusion: First Nations, especially those living on reserve, have an increased risk for cancer and other chronic diseases compared to non-Aboriginal Ontarians. These results provide evidence to support policies and programs to reduce the future burden of cancer and other chronic diseases in
Understanding physiotherapists' roles in ontario primary health care teams.
Dufour, Sinéad Patricia; Lucy, S Deborah; Brown, Judith Belle
2014-01-01
Objectif : Comprendre les rôles des physiothérapeutes et comment ils sont appliqués au sein des équipes de fournisseurs de soins de santé primaires en Ontario. Méthodes : Suivant une méthode théorique à base empirique pratique, 12 physiothérapeutes pratiquant dans des équipes de soins de santé primaires de l'Ontario ont participé à 18 entrevues personnelles détaillées semi-structurées. Toutes les entrevues ont été enregistrées, transcrites verbatim et entrées ensuite dans NVIVO-8. Le codage a suivi trois stades analytiques progressifs et était de nature répétitive, guidé par une théorie à base empirique. On a créé un système explicatif. Résultats : Les physiothérapeutes négocient leur place au sein des équipes de soins de santé primaires en jouant cinq rôles interdépendants : (1) gestionnaire; (2) évaluateur; (3) collaborateur; (4) éducateur; (5) représentant. Ces cinq rôles subissent l'influence de trois strates contextuelles : (1) équipe interprofessionnelle; (2) communauté et population desservies; (3) structure organisationnelle et financement. Le mandat du Canada au niveau des soins de santé primaires (accès, équipe, information et vie saine) circonscrit les contextes qui agissent sur les rôles joués. Conclusions : Pour s'acquitter du mandat relatif aux soins de santé primaires, les physiothérapeutes jouent de multiples rôles qui reposent sur une perspective holistique générale de la santé dans le contexte d'une équipe interprofessionnelle basée sur la collaboration et de la communauté, en suivant une approche des soins éclairée par des éléments probants. Il semble y avoir de multiples façons d'intégrer avec succès les physiothérapeutes dans les équipes de soins de santé primaires, à condition que les rôles joués soient contextualisés et conformes au mandat relatif aux soins de santé primaires.
Opportunities and barriers for a crop-based energy sector in Ontario
Klupfel, Ellen Joanne
This study investigates the existing opportunities and barriers for expanding the crop-based energy sector in Ontario. The investigation takes place at a time when growing concerns about sustainability---environmental, social, and economic---are encouraging the exploration of alternatives to energy systems based on fossil fuels, and concerns around the future viability of rural communities are making agriculturally-based and rural-based energy production systems attractive to many. To explore opportunities and barriers for the crop-based energy sector, this thesis addresses the question: What is the political-economic context within which the crop-based energy sector operates in Ontario? Taking an institutional approach, the study involved 26 interviews with individuals whose organizations influence Ontario's crop-based energy sector (that includes the biofuels ethanol and biodiesel), developed a model outlining relationships between the crop-based energy sector and other sectors of the economy, as well as the state, and implemented a survey of Ontario Members of Provincial Parliament's perspectives on biofuels. This research examines the balance of power of knowledge, production, security, finance, and technology for Ontario's crop-based energy sector. The overall balance of power currently rests with the petroleum sector. Through force field analysis, the study also identifies the key opportunities and barriers for the growth and development of the biofuels sector. These opportunities include climate change and rural development agendas, and the barriers include the petroleum sector, cost of production, and some sectors of the state. A few overarching conclusions emerge from this research: (1) Change in Ontario's crop-based energy sector is driven foremost by political and economic forces; (2) Climate change is the most significant driving force for the development and expansion of Ontario's crop-based energy sector; (3) Production cost and resistance from the
Ontario FIT - From poster child to industry crisis
Roeper, Uwe [ORTECH Consulting (Canada)
2011-07-01
Ortech is a consulting firm that provides engineering services to investors and developers in planning and operating solar, wind and water projects. This study discusses the issues involved in the renewable energy Feed-in Tariff (FIT) program in Ontario. Initially hailed as the poster child of innovative renewable programs in North America, the FIT program has been under increasing attack from political parties, anti wind groups and legal suits. The reason was the negative media coverage of noise, birdlife and health effects. Criticism was first voiced over health concerns and lack of consultation. Local governments and the legislature debated these issues and began to split along political lines over them. The lack of public support was because there was insufficient effort put into creating public awareness. Boosting grass-roots support by creating awareness is a recommendation of the paper, which also emphasises the need for a win-win strategy when the government is involved. It can be concluded that the FIT program has gone from poster child to industry crisis but has provided several learning opportunities along the way.
Aphid Transmission of the Ontario Isolate of Plum Pox Virus.
Lowery, D Thomas; Vickers, Patricia M; Bittner, Lori A; Stobbs, Lorne W; Foottit, Robert G
2015-10-01
Utilization of timed virus acquisition access probes in studies of plum pox virus (PPV) transmission by aphids demonstrated that endemic species transmitted the virus readily from plum, Prunus domestica (L.) Batsch; peach, P. persica (L.); or dwarf flowering almond, P. glandulosa Thunberg., to peach seedlings. The green peach aphid, Myzus persicae (Sulzer), was shown to be the most efficient vector. Acquisition of virus by green peach aphids from infected peach leaves resulted in 18-28% infected peach seedlings, while aphids previously fed on infected leaves of plum transferred virus to 36% of peach seedlings. Although the spirea aphid, Aphis spiraecola (Patch), was a less efficient vector than M. persicae it is perhaps more important for the spread of PPV due to its greater abundance and occurrence earlier in the season when peach trees are thought to be more susceptible to infection. Virus transmission rates varied depending on the virus source and healthy test plant species. In contrast to many previous studies, aphid inoculation of the experimental host Nicotiana benthamiana Domin occurred at a low rate, never exceeding 4%. Acquisition of PPV by M. persicae from infected peach fruit was greatly reduced compared with acquisition from leaves. The results of this research indicate that the Ontario isolate of PPV-D is readily transmissible by aphids to peach and natural spread of the virus needs to be considered in future management or eradication programs.
Physical activity in Ontario preschoolers: prevalence and measurement issues.
Obeid, Joyce; Nguyen, Thanh; Gabel, Leigh; Timmons, Brian W
2011-04-01
Early childhood is a critical period for the development of active living behaviours; however, very little is known about the physical activity levels of preschoolers from Canada. The objectives of this study were to (i) examine physical activity in a sample of Ontario preschoolers by using high-frequency accelerometry to determine activity and step counts; (ii) assess the relationship between step counts and physical activity; (iii) examine the influence of epoch length or sampling interval on physical activity; and (iv) compare measured physical activity to existing recommendations. Thirty 3- to 5-year-old children wore accelerometers to monitor habitual physical activity in 3-s epochs over a 7-day period. Preschoolers engaged in an average of 220 min of daily physical activity, 75 min of which were spent in moderate-to-vigorous physical activity (MVPA), and they accumulated 7529 ± 1539 steps·day(-1). Preschoolers who engaged in more MVPA also took more steps on a daily basis (r = 0.81, p physical activity per day for preschool-age children. Our data highlight important methodological considerations when measuring physical activity in preschoolers and the need for preschool-specific physical activity guidelines for Canadian children.
Caribou nursery site habitat characteristics in two northern Ontario parks
Natasha L. Carr
2007-04-01
Full Text Available To prevent further range recession, habitat features essential to the life-history requisites of woodland caribou (Rangifer tarandus caribou such as calving and nursery sites need to be protected for the persistence of the species. Woodland caribou may minimize predation risk during calving by either spacing out or spacing away from predators in the forest to calve on islands, wetlands, or shorelines. Our objective was to determine the characteristics of shoreline habitats used as calving and nursery sites by female woodland caribou in northern Ontario. Detailed vegetation and other site characteristics were measured at nursery sites used by cow-calf pairs in Wabakimi and Woodland Caribou Provincial Parks for comparison with shoreline sites that were not used by caribou within each park. Differences in habitat variables selected by female caribou in the two study areas reflect broad ecoregional differences in vegetation and topography. In Wabakimi Provincial Park, understorey tree density and ground detection distance played key roles in distinguishing nursery sites from sites that were not used. In Woodland Caribou Provincial Park, groundcover vegetation and shrub density were important in the selection of nursery sites by female caribou. Generally, female caribou in both parks selected nursery sites with greater slope, lower shrub density but thicker groundcover vegetation, including greater lichen abundance, and higher densities of mature trees than shoreline sites that were not used. The identification of these important features for caribou nursery sites provides a basis for improving their protection in future management policies and legislation.
Woodland caribou range occupancy in northwestern Ontario: past and present
G.D. Racey
2000-04-01
Full Text Available A zone of continuous woodland caribou (Rangifer tarandus caribou distribution is defined for northwestern Ontario. This zone establishes a benchmark for measuring the success of future management of habitat and conservation of populations. Inventory of key winter, summer and calving habitats reaffirms the concept of a dynamic mosaic of habitat tracts that supports caribou across the landscape. The historical range recession leading to this current distribution has been associated with resource development, fire and hunting activities over the past 150 years, and numerous attempts at conservation over the last 70 years. The decline was apparently phased according to several periods of development activity: i early exploitation in the early to mid-1800s; ii isolation and extirpation of southern populations due to rapid changes in forest use and access between 1890 and 1930; and iii further loss of the southernmost herds due to forest harvesting of previously inaccessible areas since the 1950s. Lessons learned from history support current conservation measures to manage caribou across broad landscapes, protect southern herds, maintain caribou habitat as part of continuous range, maintain large contiguous tracts of older forest and ensure connectivity between habitat components.
Science-seeking behaviour of Conservation Authorities in Ontario.
Sheikheldin, Gussai; Krantzberg, Gail; Schaefer, Karl
2010-05-01
The communication of science to science users is evolving to an approach that translates knowledge to targeted audiences. Under this evolution, knowledge brokers play an increasingly important role and users help 'pull' the required science to meet a policy or management imperative. To do this effectively, more insight is required into the knowledge seeking behaviour of science users and practitioners. The findings from a series of interviews that identify the science needs of Ontario's Conservation Authorities (CAs) are presented. Results indicate that emerging functions, such as source water protection and integrated water resource planning, require more science input than mature functions. Senior CA officials view personal communication with their knowledgeable staff as the most used, accessible, trustworthy, relevant, shared, and preferable source of science information. While the internet and media were considered highly accessible, they were not viewed as trustworthy. We found no relationship between CA size and science use. Further research is needed to identify where junior and intermediate CA staff obtain their science knowledge from and whether this varies as a function of CA size. Our findings will be of interest to both policy/program communities and science providers.
Traditional Knowledge: Considerations for Protecting Water in Ontario
Deborah McGregor
2012-12-01
Full Text Available In Canada, the water crisis increasingly felt around the world is being experienced primarily in small, usually Indigenous, communities. At the heart of this issue lies an ongoing struggle to have Indigenous voices heard in the decision-making processes that affect their lives, lands, and waters. As part of ancient systems of Traditional Knowledge (TK, Indigenous people bear the knowledge and the responsibility to care for the waters upon which they depend for survival. A series of internationally developed documents has supported Indigenous peoples’ calls for increased recognition of the importance of TK in resolving environmental crises, including those involving water. Ontario provincial and Canadian federal governments have been developing legislative and regulatory documents to help fend off further water-related catastrophes within their jurisdictions. Despite such efforts, a number of barriers to the successful and appropriate involvement of TK in water management remain. Based on years of community-based and policy-related research with First Nations people involved in water-related undertakings, this article highlights progress made to date, and provides Indigenous viewpoints on what further steps need to be taken. Key among these steps are the need to restore and maintain Indigenous access to traditional territories and ways of life, and the requirement for mutually respectful collaboration between TK and Western science.
Linking traditional knowledge and environmental practice in Ontario.
McGregor, Deborah
2009-01-01
Beginning in the late 1980s with the release of Our Common Future by the World Commission on Environment and Development, followed by the development of international accords such as the 1992 Convention on Biological Diversity, international pressure to resolve Indigenous rights issues has been steadily mounting. Successive Canadian governments have been striving increasingly to recognize and incorporate Aboriginal traditional knowledge into resource management planning. Following more than a decade of such efforts, the question of how to achieve such incorporation appropriately remains inadequately answered. This essay contributes to the resolution of this issue by first clarifying some key differences between Aboriginal and non-Aboriginal definitions of "traditional knowledge." Then, three Ontario case studies are briefly described that highlight the most and least successful aspects of previous undertakings. Among the lessons learned are the need to value traditional knowledge on a par with Western science while recognizing the particular capabilities of each system, and the requirement that Aboriginal peoples and their knowledge participate on a mutually respectful basis.
Watkins, J. M.; Weidel, Brian M.; Rudstam, L. G.; Holek, K. T.
2014-01-01
Increasing water clarity in Lake Ontario has led to a vertical redistribution of phytoplankton and an increased importance of the deep chlorophyll layer in overall primary productivity. We used in situ fluorometer profiles collected in lakewide surveys of Lake Ontario in 2008 to assess the spatial extent and intensity of the deep chlorophyll layer. In situ fluorometer data were corrected with extracted chlorophyll data using paired samples from Lake Ontario collected in August 2008. The deep chlorophyll layer was present offshore during the stratified conditions of late July 2008 with maximum values from 4–20 μg l−1 corrected chlorophyll a at 10 to 17 m depth within the metalimnion. Deep chlorophyll layer was closely associated with the base of the thermocline and a subsurface maximum of dissolved oxygen, indicating the feature's importance as a growth and productivity maximum. Crucial to the deep chlorophyll layer formation, the photic zone extended deeper than the surface mixed layer in mid-summer. The layer extended through most of the offshore in July 2008, but was not present in the easternmost transect that had a deeper surface mixed layer. By early September 2008, the lakewide deep chlorophyll layer had dissipated. A similar formation and dissipation was observed in the lakewide survey of Lake Ontario in 2003.
Council of Ontario Universities, Toronto.
Financial data are presented here for Ontario's twenty universities: Brock, Carleton, Guelph, Lakehead, Laurentian, Algoma, Nipissing, Hearst, McMaster, Oise, Ottawa, Queen's, Ryerson, Toronto, Trent, Waterloo, Western, Wilfrid Laurier, Windsor, and York. Contents include summary tables operating expenses by object of expense and by functional…
Leslie Collins
2017-07-01
Full Text Available After the Walkerton tragedy in 2000, where drinking water contamination left seven people dead and many suffering from chronic illness, the Province of Ontario, Canada implemented policies to develop Source Water Protection (SWP plans. Under the Clean Water Act (2006, thirty-six regional Conservation Authorities were mandated to develop watershed-based SWP plans under 19 Source Protection Regions. Most First Nations in Ontario are outside of these Source Protection Regions and reserve lands are under Federal jurisdiction. This paper explores how First Nations in Ontario are attempting to address SWP to improve drinking water quality in their communities even though these communities are not part of the Ontario SWP framework. The case studies highlight the gap between the regulatory requirements of the Federal and Provincial governments and the challenges for First Nations in Ontario from lack of funding to implement solutions to address the threats identified in SWP planning. This analysis of different approaches taken by Ontario First Nations shows that the Ontario framework for SWP planning is not an option for the majority of First Nations communities, and does not adequately address threats originating on reserve lands. First Nations attempting to address on-reserve threats to drinking water are using a variety of resources and approaches to develop community SWP plans. However, a common theme of all the cases surveyed is a lack of funding to support implementing solutions for the threats identified by the SWP planning process. Federal government initiatives to address the chronic problem of boil water advisories within Indigenous communities do not recognize SWP planning as a cost-effective tool for improving drinking water quality.
Cagnetti, Filippo
2013-11-01
We consider a numerical scheme for the one dimensional time dependent Hamilton-Jacobi equation in the periodic setting. This scheme consists in a semi-discretization using monotone approximations of the Hamiltonian in the spacial variable. From classical viscosity solution theory, these schemes are known to converge. In this paper we present a new approach to the study of the rate of convergence of the approximations based on the nonlinear adjoint method recently introduced by L.C. Evans. We estimate the rate of convergence for convex Hamiltonians and recover the O(h) convergence rate in terms of the L∞ norm and O(h) in terms of the L1 norm, where h is the size of the spacial grid. We discuss also possible generalizations to higher dimensional problems and present several other additional estimates. The special case of quadratic Hamiltonians is considered in detail in the end of the paper. © 2013 IMACS.
Shuhuan Wen
2012-01-01
Full Text Available This paper works on hybrid force/position control in robotic manipulation and proposes an improved radial basis functional (RBF neural network, which is a robust relying on the Hamilton Jacobi Issacs principle of the force control loop. The method compensates uncertainties in a robot system by using the property of RBF neural network. The error approximation of neural network is regarded as an external interference of the system, and it is eliminated by the robust control method. Since the conventionally fixed structure of RBF network is not optimal, resource allocating network (RAN is proposed in this paper to adjust the network structure in time and avoid the underfit. Finally the advantage of system stability and transient performance is demonstrated by the numerical simulations.
McGann, M; Dewar, R L; von Nessi, G
2010-01-01
The vanishing of the divergence of the total stress tensor (magnetic plus kinetic) in a neighborhood of an equilibrium plasma containing a toroidal surface of discontinuity gives boundary and jump conditions that strongly constrain allowable continuations of the magnetic field across the surface. The boundary conditions allow the magnetic fields on either side of the discontinuity surface to be described by surface magnetic potentials, reducing the continuation problem to that of solving a Hamilton--Jacobi equation. The characteristics of this equation obey Hamiltonian equations of motion, and a necessary condition for the existence of a continued field across a general toroidal surface is that there exist invariant tori in the phase space of this Hamiltonian system. It is argued from the Birkhoff theorem that existence of such an invariant torus is also, in general, sufficient for continuation to be possible. An important corollary is that the rotational transform of the continued field on a surface of disco...
无
2000-01-01
It is proved that if f is a Teichmüller self-mapping of the unit disk with a holomorphic quadratic differential φ1, and φ satisfies the growth condition m(φ,r) = 1/2π f02π |φ(reiθ)| dθ =o((1 - r)-s), r → 1, for any s ＞ 1, then f is extremal, and there exists a sequence {tn}, 0 ＜ tn ＜ 1, lim tn = 1, such that {φ(tnz)} is a Hamilton sequence. It is the precision of a n→∞ theorem of Reich-Strebel in 1974, and gives a fairly satisfactory answer to a question of Reich in 1988.
Kovach, Ryan P.; Luikart, Gordon; Lowe, Winsor H.; Boyer, Matthew C.; Muhlfeld, Clint C.
2016-01-01
Hamilton and Miller (2016) provide an interesting and provocative discussion of how hybridization and introgression can promote evolutionary potential in the face of climate change. They argue that hybridization—mating between individuals from genetically distinct populations—can alleviate inbreeding depression and promote adaptive introgression and evolutionary rescue. We agree that deliberate intraspecific hybridization (mating between individuals of the same species) is an underused management tool for increasing fitness in inbred populations (i.e., genetic rescue; Frankham 2015; Whiteley et al. 2015). The potential risks and benefits of assisted gene flow have been discussed in the literature, and an emerging consensus suggests that mating between populations isolated for approximately 50–100 generations can benefit fitness, often with a minor risk of outbreeding depression (Frankham et al. 2011; Aitken & Whitlock 2013; Allendorf et al. 2013).
Hamilton-Jacobi method and effective actions of D-brane and M-brane in supergravity
Sato, Matsuo E-mail: machan@het.phys.sci.osaka-u.ac.jp; Tsuchiya, Asato E-mail: tsuchiya@het.phys.sci.osaka-u.ac.jp
2003-11-03
We show that the effective actions of D-brane and M-brane are solutions to the Hamilton-Jacobi (H-J) equations in supergravities. This fact means that these effective actions are on-shell actions in supergravities. These solutions to the H-J equations reproduce the supergravity solutions that represent D-branes in a B{sub 2} field, M2 branes and the M2-M5 bound states. The effective actions in these solutions are those of a probe D-brane and a probe M-brane. Our findings can be applied to the study of the gauge/gravity correspondence, especially the holographic renormalization group, and a search for new solutions of supergravity.
Sakalli, I., E-mail: izzet.sakalli@emu.edu.tr; Mirekhtiary, S. F., E-mail: fatemeh.mirekhtiary@emu.edu.tr [Eastern Mediterranean University G. Magosa, Department of Physics (Turkey)
2013-10-15
Hawking radiation of a non-asymptotically flat 4-dimensional spherically symmetric and static dilatonic black hole (BH) via the Hamilton-Jacobi (HJ) method is studied. In addition to the naive coordinates, we use four more different coordinate systems that are well-behaved at the horizon. Except for the isotropic coordinates, direct computation by the HJ method leads to the standard Hawking temperature for all coordinate systems. The isotropic coordinates allow extracting the index of refraction from the Fermat metric. It is explicitly shown that the index of refraction determines the value of the tunneling rate and its natural consequence, the Hawking temperature. The isotropic coordinates in the conventional HJ method produce a wrong result for the temperature of the linear dilaton. Here, we explain how this discrepancy can be resolved by regularizing the integral possessing a pole at the horizon.
Sakalli, I.; Mirekhtiary, S. F.
2013-10-01
Hawking radiation of a non-asymptotically flat 4-dimensional spherically symmetric and static dilatonic black hole (BH) via the Hamilton-Jacobi (HJ) method is studied. In addition to the naive coordinates, we use four more different coordinate systems that are well-behaved at the horizon. Except for the isotropic coordinates, direct computation by the HJ method leads to the standard Hawking temperature for all coordinate systems. The isotropic coordinates allow extracting the index of refraction from the Fermat metric. It is explicitly shown that the index of refraction determines the value of the tunneling rate and its natural consequence, the Hawking temperature. The isotropic coordinates in the conventional HJ method produce a wrong result for the temperature of the linear dilaton. Here, we explain how this discrepancy can be resolved by regularizing the integral possessing a pole at the horizon.
Sakalli, I
2013-01-01
Hawking radiation of a non-asymptotically flat (NAF) 4-dimensional spherically symmetric and static dilatonic black hole (BH) via the Hamilton-Jacobi (HJ) method has been studied. In addition to the naive coordinates, we have used four more different coordinate systems which are well-behaved at the horizon. Except the isotropic coordinates, direct computation of the HJ method leads us the standard Hawking temperature for all coordinate systems. The isotropic coordinates render possible to get the index of refraction extracting from the Fermat metric. It is explicitly shown that the index of refraction determines the value of the tunneling rate and its natural consequence, Hawking temperature. The isotropic coordinates within the conventional HJ method produce wrong result for the temperature of the LDBH. Here, we explain how this discrepancy can be resolved by regularizing the integral possessing a pole at the horizon.
Rahman, M Atiqur
2013-01-01
The massive particles tunneling method has been used to investigate the Hawking non-thermal and purely thermal radiations of Schwarzschild Anti-de Sitter (SAdS) black hole. Considering the spacetime background to be dynamical, incorporate the self-gravitation effect of the emitted particles the imaginary part of the action has been derived from Hamilton-Jacobi equation. Using the conservation laws of energy and angular momentum we have showed that the non-thermal and purely thermal tunneling rates are related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The result obtained for SAdS black hole is also in accordance with Parikh and Wilczek\\rq s opinion and gives a correction to the Hawking radiation of SAdS black hole.
Hamilton-Jacobi method and effective actions of D-brane and M-brane in supergravity
Sato, Matsuo; Tsuchiya, Asato
2003-11-01
We show that the effective actions of D-brane and M-brane are solutions to the Hamilton-Jacobi (H-J) equations in supergravities. This fact means that these effective actions are on-shell actions in supergravities. These solutions to the H-J equations reproduce the supergravity solutions that represent D-branes in a B2 field, M2 branes and the M2-M5 bound states. The effective actions in these solutions are those of a probe D-brane and a probe M-brane. Our findings can be applied to the study of the gauge/gravity correspondence, especially the holographic renormalization group, and a search for new solutions of supergravity.
Rahman, M. Atiqur; Hossain, M. Ilias
2013-06-01
The massive particles tunneling method has been used to investigate the Hawking non-thermal and purely thermal radiations of Schwarzschild Anti-de Sitter (SAdS) black hole. Considering the spacetime background to be dynamical, incorporate the self-gravitation effect of the emitted particles the imaginary part of the action has been derived from Hamilton-Jacobi equation. Using the conservation laws of energy and angular momentum we have showed that the non-thermal and purely thermal tunneling rates are related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The result obtained for SAdS black hole is also in accordance with Parikh and Wilczek's opinion and gives a correction to the Hawking radiation of SAdS black hole.
Salisbury, Donald; Sundermeyer, Kurt
2015-01-01
Classical background independence is reflected in Lagrangian general relativity through covariance under the full diffeomorphism group. We show how this independence can be maintained in a Hamilton-Jacobi approach that does not accord special privilege to any geometric structure. Intrinsic spacetime curvature based coordinates grant equal status to all geometric backgrounds. They play an essential role as a starting point for inequivalent semi-classical quantizations. The scheme calls into question Wheeler's geometrodynamical approach and the associated Wheeler-DeWitt equation in which three-metrics are featured geometrical objects. The formalism deals with variables that are manifestly invariant under the full diffeomorphism group. Yet, perhaps paradoxically, the liberty in selecting intrinsic coordinates is precisely as broad as is the original diffeomorphism freedom. We show how various ideas from the past five decades concerning the true degrees of freedom of general relativity can be interpreted in light...
九节点Hamilton等参元列式%9-node Isoparametric Element of Hamilton Canonical Equation
邢瑞山; 卿光辉
2012-01-01
结合弹性材料修正后的H-R变分原理和九节点四边形等参元二次插值函数,建立了九节点Hamilton等参元列式的正则方程.简要地介绍了弹性材料修正后的H-R变分原理.基于变分原理使用3×3的高斯积分详细地推导了Hamilton正则方程的九节点等参元列式,使得九节点等参元在有限元法中的优越性与弹性力学Hamihon正则方程的半解析法得到了有机的结合.数值实例的结果证明了本文九节点Hamilton等参元列式的正确性.%The 9-node isoparametric element of Hamiltonian canonical equation has been established by combining the modified Hellinger-Reissner (H-R) variational principle of elastic material and quadratic interpolation function of 9-node quadrilateral isoparametric element. Firstly, the modified H-R variational principle for the elastic material was briefly presented. Then, based on the variational principle and the 3 ×3 Guass integration, the Hamilton canonical equation of 9-node isoparametric element was derived in detail. The advantages of 9-node isoparametric element in finite element were combined with the semi-analytical method of elasticity Hamilton canoncial equation organically. The results of numerical examples prove the correctness of the 9-node isoparametric element formulation.
丁金凤; 金世欣; 张毅
2016-01-01
The fractional Noether symmetries and fractional conserved quantities for Hamilton system with time delay based on Caputo derivatives are discussed.The fractional Hamilton canonical equations of the corresconding system with time delay are established base upon the fractional Hamilton principle of the Hamilton systems with time delay.Then,the fractional Noether symmetries of the Hamilton system with time delay are obtained,which based on the invariance of the fractional Hamilton action with time delay under the infinitesimal transformations of group.Finally,fractional Noether theorems with time delay of the Hamilton system are established.At the end,one example is given to illustrate the application of the results.%提出并讨论了Caputo导数定义下的含时滞的Hamilton系统的分数阶Noether对称性与守恒量。根据含时滞的Hamilton系统的分数阶Hamilton原理，建立了相应的含时滞的分数阶Hamilton 正则方程；依据分数阶Hamilton作用量在无限小变换下的不变性，得到了含时滞的Hamilton系统的分数阶Noether对称性；最后，建立了系统的含时滞的分数阶Noether理论，并举例说明结果的应用。
Azim, M.E.; Wahab, M.A.; Dam, van A.A.; Beveridge, M.C.M.; Verdegem, M.C.J.
2001-01-01
The effects of periphyton, grown on bamboo substrates, on growth and production of two Indian major carps, rohu, Labeo rohita (Hamilton) and gonia, Labeo gonius (Linnaeus), were studied at the Bangladesh Agricultural University, Mymensingh. For each species, five ponds were provided with bamboo subs
Bech, Per; Csillag, Claudio; Hellström, Lone;
2013-01-01
Objective: To use principal component analysis (PCA) to test the hypothesis that the items of the Hamilton Depression Scale (HAM-D17) have been selected to reflect depression disability, whereas some of the items are specific for sub-typing depression into typical vs. atypical depression. Method:...
Szigeti, Jeno
2011-01-01
If A is an n \\times n matrix over a ring R satisfying the polynomial identity [x,y][u,v]=0, then an invariant Cayley-Hamilton identity of the form \\Sigma A^{i}c_{i,j}A^{j}=0 with c_{i,j}\\in R and c_{n,n}=(n!)^2 holds for A.
Osetrin, Konstantin; Osetrin, Evgeny
2015-01-01
The characteristics of dust matter in space-time models, admitting the existence of privilege coordinate systems are given, where the single-particle Hamilton-Jacobi equation can be integrated by the method of complete separation of variables. The resulting functional form of the 4-velocity field and energy density of matter for all types of spaces under consideration is presented.
NONE
1996-02-01
The decision document presents the selected remedial action for Operable Unit 1 of the FEMP site in Hamilton and Butler Counties, Ohio. Operable Unit 1 consists of Waste Pits 1 through 6, the Burn Pit, the Clearwell, and associated environmental media (excluding groundwater).
Swenson, Sarah A
2015-12-01
W.D. Hamilton's theory of inclusive fitness saw the evolution of altruism from the point of view of the gene. It was at heart a theory of limits, redefining altruistic behaviours as ultimately selfish. This theory inspired two controversial texts published almost in tandem, E.O. Wilson's Sociobiology: The New Synthesis (1975) and Richard Dawkins's The Selfish Gene (1976). When Wilson and Dawkins were attacked for their evolutionary interpretations of human societies, they claimed a distinction between reporting what is and declaring what ought to be. Can the history of sociobiological theories be so easily separated from its sociopolitical context? This paper draws upon unpublished materials from the 1960s and early 1970s and documents some of the ways in which Hamilton saw his research as contributing to contemporary concerns. It pays special attention to the 1969 Man and Beast Smithsonian Institution symposium in order to explore the extent to which Hamilton intended his theory to be merely descriptive versus prescriptive. From this, we may see that Hamilton was deeply concerned about the political chaos he perceived in the world around him, and hoped to arrive at a level of self-understanding through science that could inform a new social order.
Molnár, Orsolya; Bajer, Katalin; Mészáros, Boglárka; Török, János; Herczeg, Gábor
2013-06-01
During female mate choice, conspicuous male sexual signals are used to infer male quality and choose the best sire for the offspring. The theory of parasite-mediated sexual selection (Hamilton-Zuk hypothesis) presumes that parasite infection can influence the elaboration of sexual signals: resistant individuals can invest more energy into signal expression and thus advertise their individual quality through signal intensity. By preferring these males, females can provide resistance genes for their offspring. Previous research showed that nuptial throat colour of male European green lizard, Lacerta viridis, plays a role in both inter- and intrasexual selections as a condition-dependent multiple signalling system. The aim of this study was to test the predictions of the Hamilton-Zuk hypothesis on male European green lizards. By blood sampling 30 adult males during the reproductive season, we found members of the Haemogregarinidae family in all but one individual (prevalence = 96%). The infection intensity showed strong negative correlation with the throat and belly colour brightness in line with the predictions of the Hamilton-Zuk hypothesis. In addition, we found other correlations between infection intensity and other fitness-related traits, suggesting that parasite load has a remarkable effect on individual fitness. This study shows that throat patch colour of the European green lizards not only is a multiple signalling system but also possibly acts as an honest sexual signal of health state in accordance with the Hamilton-Zuk hypothesis.
Abrahamyan, Lusine; Wong, Josephine; Pham, Ba'; Trubiani, Gina; Carcone, Steven; Mitsakakis, Nicholas; Rosen, Laura; Rac, Valeria E; Krahn, Murray
2015-01-01
Multidisciplinary team approach is an essential component of evidence-based wound management in the community. The objective of this study was to identify and describe community-based multidisciplinary wound care teams in Ontario. For the study, a working definition of a multidisciplinary wound care team was developed, and a two-phase field evaluation was conducted. In phase I, a systematic survey with three search strategies (environmental scan) was conducted to identify all multidisciplinary wound care teams in Ontario. In phase II, the team leads were surveyed about the service models of the teams. We identified 49 wound care teams in Ontario. The highest ratio of Ontario seniors to wound team within each Ontario health planning region was 82,358:1; the lowest ratio was 14,151:1. Forty-four teams (90%) participated in the survey. The majority of teams existed for at least 5 years, were established as hospital outpatient clinics, and served patients with chronic wounds. Teams were heterogeneous in on-site capacity of specialized diagnostic testing and wound treatment, team size, and patient volume. Seventy-seven percent of teams had members from three or more disciplines. Several teams lacked essential disciplines. More research is needed to identify optimal service models leading to improved patient outcomes.
Sexual difference in mercury concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
Madenjian, C.P.; Keir, M.J.; Whittle, D.M.
2011-01-01
We determined total mercury (Hg) concentrations in 50 female lake trout (Salvelinus namaycush) and 69 male lake trout from Lake Ontario (Ontario, Canada and New York, United States). Results showed that, on average, males were 8% higher in Hg concentration than females in Lake Ontario. We also used bioenergetics modeling to determine whether a sexual difference in gross growth efficiency (GGE) could explain the observed sexual difference in Hg concentrations. According to the bioenergetics modeling results, male GGE was about 3% higher than female GGE, on average. Although the bioenergetics modeling could not explain the higher Hg concentrations exhibited by the males, a sexual difference in GGE remained a plausible explanation for the sexual difference in Hg concentrations of the lake trout. In an earlier study, male lake trout from Lake Ontario were found to be 22% higher in polychlorinated biphenyl (PCB) concentration than females from Lake Ontario. Thus, although males were higher in both Hg and PCB concentrations, the degree of the sexual difference in concentration varied between the two contaminants. Further research on sexual differences in Hg excretion rates and Hg direct uptake rates may be needed to resolve the disparity in results between the two contaminants.
Sensitivity of GRACE-derived estimates of groundwater-level changes in southern Ontario, Canada
Hachborn, Ellen; Berg, Aaron; Levison, Jana; Ambadan, Jaison Thomas
2017-06-01
Amidst changing climates, understanding the world's water resources is of increasing importance. In Ontario, Canada, low water conditions are currently assessed using only precipitation and watershed-based stream gauges by the Conservation Authorities in Ontario and the Ministry of Natural Resources and Forestry. Regional groundwater-storage changes in Ontario are not currently measured using satellite data by research institutes. In this study, contributions from the Gravity Recovery and Climate Experiment (GRACE) data are compared to a hydrogeological database covering southern Ontario from 2003 to 2013, to determine the suitability of GRACE total water storage estimates for monitoring groundwater storage in this location. Terrestrial water storage data from GRACE were used to determine monthly groundwater storage (GWS) anomaly values. GWS values were also determined by multiplying groundwater-level elevations (from the Provincial Groundwater Monitoring Network wells) by specific yield. Comparisons of GRACE-derived GWS to well-based GWS data determined that GRACE is sufficiently sensitive to obtain a meaningful signal in southern Ontario. Results show that GWS values produced by GRACE are useful for identifying regional changes in groundwater storage in areas with limited available hydrogeological characterization data. Results also indicate that GRACE may have an ability to forecast changes in groundwater storage, which will become useful when monitoring climate shifts in the near future.
Canadian federalism and the Canadian health care program: a comparison of Ontario and Quebec.
Palley, H A
1987-01-01
The Quebec and Ontario health insurance and health service delivery systems, developed within the parameters of federal regulations and national financial subsidies, provide generally universal and comprehensive basic hospital and medical benefits and increasingly provide for the delivery of long-term care services. Within a framework of cooperative federalism, the health care systems of Ontario and Quebec have developed uniquely. In terms of vital statistics, the health of Ontario and Quebec residents generally is comparable. In viewing expenditures, Quebec has a more clearly articulated plan for providing accessible services to low-income persons and for integrating health and social services, although it has faced some difficulties in seeking to achieve the latter goal. Its plans for decentralized services are counter-balanced by a strong provincial role in health policy decision-making. Quebec's political culture also allows the province to play a stronger role in hospital planning and in the regulation of physician income than one finds in Ontario. These political dynamics allow Quebec an advantage in control of costs. In Ontario, in spite of some recent setbacks, physician interests and hospital sector interests play a more active role in health system bargaining and are usually able to influence remuneration and resource allocation decisions more than physician interests and hospital sector interests in Quebec.
Detsky, A S; Stacey, S R; Bombardier, C
1983-07-21
This study documents the increases in real inputs (e.g., labor and equipment) employed in Ontario's hospital sector between 1968 and 1981--a period of universal government-financed hospital insurance and a government regulatory strategy involving global budgeting. Total expenditures in Ontario increased by only 16 per cent in terms of real inputs, as compared with an increase of 101 per cent in the United States. Real inputs per patient-day increased at a mean annual rate of 0.68 per cent in Ontario versus 5.19 per cent in the United States (P less than 0.001). Real inputs per admission decreased at a mean annual rate of 1.12 per cent in Ontario, as compared with an increase of 4.15 per cent in the United States (P less than 0.0001). We conclude that regulation can contain the growth of real inputs employed in the hospital sector even in the face of an incentive structure that does not promote cost consciousness on the part of patients or physicians. Although the effect of this strategy on the quality of care is unknown, so far it appears to have been politically acceptable in Ontario.
A Atmospheric Dispersion Model for the Sudbury, Ontario, Area.
Huhn, Frank Jones
1982-03-01
A mathematical model was developed and tested to predict the relationship between sulphur oxide and trace metal emissions from smelters in the Sudbury, Ontario area, and atmospheric, precipitation, lake water and sediment chemistry. The model consists of atmospheric and lake chemistry portions. The atmospheric model is a Gaussian crosswind concentration distribution modification to a box model with a uniform vertical concentration gradient limited by a mixing height. In the near-field Briggs' plume rise and vertical dispersion terms are utilized. Oxidation, wet and dry deposition mechanisms are included to account for the gas, liquid and solid phases separately. Important improvements over existing models include (1) near- and far-field conditions treated in a single model; (2) direct linkage of crosswind dispersion to hourly meteorological observations; (3) utilization of maximum to minimum range of input parameters to realistically model the range of outputs; (4) direct linkage of the atmospheric model to a lake model. Precipitation chemistry as calculated by the atmospheric model is related to lake water and sediment chemistry utilizing a mass balance approach and assuming a continuously stirred reactor (CSTR) model to describe lake circulation. All inputs are atmospheric, modified by hydrology, soil chemistry and sedimentation. Model results were tested by comparison with existing atmospheric and precipitation chemistry measurements, supplemented with analyses of lake water and sediment chemistry collected in a field program. Eight pollutant species were selected for modeling: sulphur dioxide, sulphate ion, hydrogen ion, copper, nickel, lead, zinc, and iron. The model effectively predicts precipitation chemistry within 150 km of Sudbury, with an average prediction to measurement ratio of 90 percent. Atmospheric concentrations are effectively predicted within 80 km, with an average prediction to measurement ratio of 81 percent. Lake chemistry predictions are
Physical and psychological determinants of injury in Ontario forest firefighters.
Gordon, H; Larivière, M
2014-12-01
Forest firefighters are faced with multiple physical and psychological challenges as a result of their duties. Little is known about the determinants of injury among these workers. The Ontario Ministry of Natural Resources (OMNR) Aviation, Forest Fire and Emergency Services (AFFES) records detailed information on two mutually exclusive types of workplace injury: First aid (self-reported) and Workplace Safety Insurance Board (WSIB, i.e. received medical attention). To identify the contributions of physical and psychological factors on the likelihood of injury among forest firefighters. Participants were male and female forest firefighters aged between 18 and 65. Data were collected using two self-administered instruments: The NEO Personality Inventory and the Job Stress Survey. Secondary data were collected from the OMNR AFFES and data were analysed by way of multivariate statistical procedures. There were 252 participants. Those who were older, had a history of injury, had high scores for the personality construct of Neuroticism or low scores for the Openness construct were significantly more likely to incur a first aid injury, while those with high experience levels were significantly less likely to incur injury (P < 0.05). High job stress was the only significant predictor of WSIB injury (P < 0.05). First aid and WSIB injuries in the OMNR AFFES were quite distinct phenomena and different factors need consideration in their prediction. It is recommended that managers and decision-makers in this field consider factors such as job stress, personality and the prior occurrence of injuries in their assessment of risk. © The Author 2014. Published by Oxford University Press on behalf of the Society of Occupational Medicine. All rights reserved. For Permissions, please email: journals.permissions@oup.com.
Evaluation of offshore stocking of Lake Trout in Lake Ontario
Lantry, B.F.; O'Gorman, R.; Strang, T.G.; Lantry, J.R.; Connerton, M.J.; Schanger, T.
2011-01-01
Restoration stocking of hatchery-reared lake trout Salvelinus namaycush has occurred in Lake Ontario since 1973. In U.S. waters, fish stocked through 1990 survived well and built a large adult population. Survival of yearlings stocked from shore declined during 1990–1995, and adult numbers fell during 1998–2005. Offshore stocking of lake trout was initiated in the late 1990s in response to its successful mitigation of predation losses to double-crested cormorants Phalacrocorax auritus and the results of earlier studies that suggested it would enhance survival in some cases. The current study was designed to test the relative effectiveness of three stocking methods at a time when poststocking survival for lake trout was quite low and losses due to fish predators was a suspected factor. The stocking methods tested during 2000–2002 included May offshore, May onshore, and June onshore. Visual observations during nearshore stockings and hydroacoustic observations of offshore stockings indicated that release methods were not a direct cause of fish mortality. Experimental stockings were replicated for 3 years at one site in the southwest and for 2 years at one site in the southeast. Offshore releases used a landing craft to transport hatchery trucks from 3 to 6 km offshore out to 55–60-m-deep water. For the southwest site, offshore stocking significantly enhanced poststocking survival. Among the three methods, survival ratios were 1.74 : 1.00 : 1.02 (May offshore : May onshore : June onshore). Although not statistically significant owing to the small samples, the trends were similar for the southeast site, with survival ratios of 1.67 : 1.00 : 0.72. Consistent trends across years and sites indicated that offshore stocking of yearling lake trout during 2000–2002 provided nearly a twofold enhancement in survival; however, this increase does not appear to be great enough to achieve the 12-fold enhancement necessary to return population abundance to restoration