28 resultados para Griffin, Susan
em Brock University, Canada
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Indenture (vellum) of bargain and sale between Jacob Canniff and Susan Canniff of Niagara to Lewis Clement of Niagara, the south half of Lot 69 Town of Niagara - Instrument no. 7072, June 21, 1827.
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Payment for the Shelby, Cunningham, Jarvis, Jones, Mater, Sampson, Conklin, Dennis and Griffin accounts, Jan. 29, 1883.
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Payment for the Shelby, Cunningham, Jarvis, Jones, Mater, Sampson, Dennis, Conklin and Griffin accounts, July 30, 1883.
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Payment for the Cunningham, Jarvis, Jones, Mater, Sampson, Dennis, Conklin and Griffin accounts, Jan. 29, 1884.
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Payment for Atkins, Schmidt, Crick, Mank, Underwood and Crew accounts Jan. 26, 1886.
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Payment for Sampson, Griffin, Cunningham and Jones accounts, Feb. 14, 1887.
Letter to Samuel Woodruff from Jarvis, Conklin and Co. regarding Conklin, Dennis, Griffin and Howard
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Letter to Samuel Woodruff from Jarvis, Conklin and Co. regarding Conklin, Dennis, Griffin and Howard accounts, Sept. 23, 1882.
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Pictured here from left to right are the first 4 presidents (and one of the former acting presidents) of Brock University: Dr. James Gibson (President, 1964 - 1973), Dr. Alan Earp (President, 1974 - 1987), Dr. Terry White (President, 1988 - 1996), Dr. Susan Clark (Acting President, ca. 1996 - 1997), and Dr. David Atkinson (President, 1997 - 2005). Together they have served Brock for over 40 years from 1964 - 2005.
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Currently, few studies address what kindergarten children think about bullying behaviour and explore whether or not they perceive bullying as a prevalent concern in their day-to-day school activities. This study described 15 Canadian kindergarten students' graphic and narrative representations (drawings and stories) of their bullying experiences. The content of students' drawings and stories were analyzed to explore how kindergarten children perceived bullying within the context of their lives. Coding categories were developed to analyze the kindergartners' perceptions, and emerging themes were also explored. In general, findings showed that kindergartners perceive bullying situations as occurring during one-to-one peer interaction and not within social group situations. Results are discussed in relation to educational implications.
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This experimental study examined the effects of cooperative learning and expliciUimpliGit instruction on student achievement and attitudes toward working in cooperative groups. Specifically, fourth- and fifth-grade students (n=48) were randomly assigned to two conditions: cooperative learning with explicit instruction and cooperative learning with implicit instruction. All participants were given initial training either explicitly or implicitly in cooperative learning procedures via 10 one-hour sessions. Following the instruction period, all students participated in completing a group project related to a famous artists unit. It was hypothesized that the explicit instruction training would enhance students' scores on the famous artists test and the group projects, as well as improve students' attitudes toward cooperative learning. Although the explicit training group did not achieve significantly higher scores on the famous artists test, significant differences were found in group project results between the explicit and implicit groups. The explicit group also exhibited more favourable and positive attitudes toward cooperative learning. The findings of this study demonstrate that combining cooperative learning with explicit instruction is an effective classroom strategy and a useful practice for presenting and learning new information, as well as working in groups with success.
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Fire blight is an economically important disease of apples and pears that is caused by the
bacterium Erwinia amylovora. Control of the disease depends on limiting primaly blosson1
infection in the spring, and rapidly removing infected tissue. The possibility of using phages to
control E.amylovora populations has been suggested, but previous studies have. failed to show
high treatment efficacies. This work describes the development of a phage-based biopesticide
that controls E. amylovora populations under field conditions, and significantly reduces the
incidence of fire blight.
This work reports the first use ofPantoea agglomerans, a non-pathogenic relative ofE.
amylovora, as a carrier for E. amylovora.phages. Its role is to support a replicating population of
these phages on blossom surfaces during the period when the flowers are most susceptible to
infection. Seven phages and one carrier isolate were selected for field trials from existing
collections of 56 E. amylovora phages and 249 epiphytic orchard bacteria. Selection of the .
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phages and carrier was based on characteristics relevant to the production and field perfonnance
of a biopesticide: host range, genetic diversity, growth under the conditions of large-scale
production, and the ability to prevent E. amylovora from infecting pear blossoms. In planta
assays showed that both the phages and the carrier make significant contributions to reducirig the
development of fire blight symptoms in pear blossoms.
Field-scale phage production and purification methods were developed based on the
growth characteristics of the phages and bacteria in liquid culture, and on the survival of phages
in various liquid media.
Six of twelve phage-carrier biopesticide treatments caused statistically signiflcant reductions in disease incidence during orchard trials. Multiplex real-time PCR was used to
simultaneously monitor the phage, carrier, and pathogen populations over the course of selected
treatments. In all cases. the observed population dynamics of the biocontrol agents and the
pathogen were consistent with the success or failure of each treatment to control disease
incidence. In treatments exhibiting a significantly reduced incidel1ce of fire blight, the average
blossom population ofE.amylovora had been reduced to pre-experiment epiphytic levels. In
successful treatments the phages grew on the P. agglomerans carrier for 2 to 3 d after treatment
application. The phages then grew preferentially on the pathogen, once it was introduced into this
blossom ecosystem. The efficacy of the successful phage-based treatnlents was statistically
similar to that of streptomycin, which is the most effective bactericide currently available for fire
blight prevention.
The in planta behaviour ofE. amylovora was compared to that ofErwinia pyrifoliae, a
closely related species that causes fire blight-like synlptoms on pears in southeast Asia. Duplex
real-time PCR was used to monitor the population dynamics of both species on single blossonls.
E. amylovora exhibited a greater competitive fitness on Bartlett pear blossoms than E. pyrifoliae.
The genome ofErwinia phage
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The purpose of this phenomenological study was to uncover the meaning of lifelong learning to nurses in an Academic Health Care setting. Six female pediatric nurses were interviewed and audiotaped in response to 2 main questions of interpretation and engagement in lifelong learning with respect to their nursing practice. Four additional probing questions elicited responses of further qualities and characteristics of the meaning of lifelong learning. The emergent themes uncovered the characteristics and nature of the journey of lifelong learning. The themes evolved into parallel characteristics developing into the concepts of personal empowerment and occupational authorship. The personal empowerment concept involved processes whereby the participants overcame or removed barriers to engage in personal lifelong learning. Participants utilized personal power and internal motivators to sustain their engagement in lifelong learning. The occupational authorship concept involved participants controlling their exploration into lifelong learning through collaboration and recognition of occupational demands to be met as a professional. The remaining themes revealed a seasoning journey. This journey entailed a process of mastery through the themes of engagement discord, discovery pilgrimage, transforming, and maturation. The engagement in this journey resulted in their lifelong learning to becoming more intuitive and a part oftheir being. The overall theme uncovered from the journeys was one of a vocation described as a call to thinking critically of nursing practice. The participants responded to lifelong learning as a call to be a good nurse by using critical thinking through reflection, transformative and constructionist learning processes. This study gave voice to the meaning of lifelong learning in their nursing practice as interpreted by -ao the nurse participants.
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This study addressed the problem of instructor support for self-directed learning, specifically, learner-directed program planning, within a classroom setting in higher education. A combination of survey, interview, document analysis, and observation was used to assess and evaluate the attitudes and practices of a sample of full-time faculty at an Ontario university. Eighty-seven percent of the study sample reported instructional beliefs, values, and expectations that were not supportive of self-directed learning, especially in terms of student participation in program planning. Planning was seen as the responsibility of the instructor. Instructors were least open to student participation in the planning of the evaluation of learning. However, there was considerable stated support for other of the basic principles of adult education. The remaining 13% of the study sample reported instructional beliefs, values, and expectations that were fully supportive of self-directed learning. Instructional practices were analyzed in relation to the instructors' stated beliefs. Although practices reflected, in many instances, instructors' statements of support, there were some significant discrepancies between apparent support for the concept of self-directed learning and actual classroom practice. Both beliefs and practice were compared to a research model of self-directed learning. Most instructors did not have a concept of self-directed learning as comprehensive as that described in the research model. Instructor support for self-directed learning was profoundly influenced by the university setting. It was concluded that more strenuous attempts to research, enhance, and promote instructional and institutional support for self-directed learning in higher education are warranted.
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Although exceptions may be readily identified, two generalizations concerning genetic differences among species may be drawn from the available allozyme and chromosome data. First, structural gene differences among species vary widely. In many cases, species pairs do not differ more than intraspecific populations. This suggests that either very few or no gene substitutions are required to produce barriers to reproduction (Avise 1976). Second, chromosome form and/or number differs among even closely related species (White 1963; 1978; Fredga 1977; Wright 1970). Many of the observed chromosomal differences involve translocational rearrangements; these produce severe fitness depression in heterozygotes and were, thus, long considered unlikely candidates for the fixation required of genetic changes leading to speciation (Wright 1977). Nonetheless, the fact that species differences are frequently translocational argues convincingly for their fixation despite prejudices to the contrary. Haldane's rule states that in the F of interspecific crosses, the heterogametic sex is absent or sterile in the preponderance of cases (Haldane 1932). This rule definitely applies in the genus Dr°sophila (Ehrman 1962). Sex chromosome translocations do not impose a fitness depression as severe as that imposed by autosomal translocations, and X-Y translocations may account for Haldane's rule (Haldane 1932). Consequently a study of the fit ness parameters of an X·yL and a yS chromosome in Drosophila melanogaster populations was initiated by Tracey (1972). Preliminary results suggested that x.yL//YSmales enjoyed a mating advantage with X·yL//X·yL females, that this advantage was frequency dependent, that the translocation produced sexual isolation and that interactions between the yL, yS and a yellow marker contributed to the observed isolation (Tracey and Espinet 1976; Espinet and Tracey 1976). Encouraged by the results of these prelimimary studies, further experiments were performed to clarify the genetic nature of the observed sexual isolation, S the reality of the y frequency dependent fitness .and the behavioural changes, if any, produced by the translocation. The results of this work are reported herein. Although the marker genes used in earlier studies, sparkling poliert an d yellow have both been found to affect activity,but only yellow effects asymmetric sexual isolation. In addition yellow effects isolation through an interaction with the T(X-y) chromosomes, yS also effects isolation, and translocational strains are isolated from those of normal karyotype in the absence of marker gene differences. When yS chromosomes are in competition with y chromosomes on an X.yL background, yS males are at a distinct advantage only when their frequency is less than 97%. The sex chromosome translocation alters the normal courtship pattern by the incorporation of circling between vibration and licking in the male repertoire. Finally a model of speciation base on the fixation of this sex chromosome translocation in a geographically isolated gene pool is proposed.
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The present research study examined the relationships in a work motivation context among perceived importance and achievement of work values, locus of control and internal work motivation. The congruence of a work value was considered to be the discrepancy between the importance of a work value and the perceived achievement of that value. The theoretical framework utilized was based on a self-perpetuating cycle of motivation which included the perceived importance and achievement of work values and internal work motivation as separate and distinct, yet interrelated factors. It was hypothesized that individuals who experienced high congruence of work values would experience higher levels of internal work motivation than individuals who had low congruence of work values. It was also hypothesized that individuals who had an internal locus of control would experience more internal work motivation individuals well, the and have higher congruence of work values than who had an external locus of control. As possibility of locus of control as a moderator between importance of work values and internal work motivation was explored. Survey data were collected from 184 managerial level employees of the XYZ company during an ongoing training session. The following instruments were employed to measure the variables: Elizur's (1984) Importance of Work Values, Hunt and Saul's (1985) Achievement of Work Values, Hatfield, Robinson and Huseman's (1975) Job Perception Scale, a modified version of Rotter's (1966) I-E Locus of Control Scale and the Internal Work Motivation Scale (Hackman & Oldham, 1980) which is a part of the Job Diagnostic Survey. The findings indicated that locus of control was not a significant factor in determining congruence between work values or internal work motivation for this sample. Furthermore, locus of control was also found not to be a moderator between the importance of work values and internal work motivation. All individuals in this study had relatively high levels of internal work motivation. However, individuals who had higher congruence of work values did have significantly higher internal work motivation than those who had low congruence of work values for a majority of the 21 values. This was particularly true for the intrinsic values which included responsibility, meaningfulness and use of abilities. In addition, the data were analysed into a hierarchy of needs to indicate possible organizational development or human resource development needs for the XYZ corporation.