WorldCat Identities

QUEEN'S UNIV KINGSTON (Ont.)

Overview
Works: 34 works in 50 publications in 1 language and 50 library holdings
Classifications: GA155,
Publication Timeline
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Most widely held works by QUEEN'S UNIV KINGSTON (Ont.)
Asymptotic Efficiency of the Maximum Likelihood Estimator of a Parameter for the M/G/1 Queueing System( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

This paper discusses asymptotic efficiency of the maximum likelihood estimator of the parameters of the M/G/1 queueing system for full likelihood and reduced likelihood functions. The efficiency of the maximum likelihood estimator of the reduced likelihood function relative to full likelihood function is derived
Training the Absolute Identification of Pitch( Book )

1 edition published in 1969 in English and held by 1 WorldCat member library worldwide

Two methods for training the absolute judgment of pitch, reference training and series training, were studied. Reference training concentrated during training on the identification of three reference tones in a set of nine pure tones, while series training gave equal weight during training to the identification of all nine tones. Results of pre- and posttraining tests, scored for the number of correct judgments, showed that reference training was more effective than series training for listeners with musical experience. In addition, discriminability (d) scaling of pre- and posttest performance indicated that reference training was particularly effective for training listeners with musical experience when the nine tones of a set were grouped into three pitch classes-high, medium, and low pitch. Listeners without musical experience benefited from both training methods, but their overall improvement was less than that for musical listeners. (Author)
Role of Stat3 and ErbB2 in Breast Cancer( Book )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Stat3 is activated by cytokine receptors as well as receptor and non-receptor tyrosine kinases. Activation of Stat3 has been demonstrated in breast and other cancers, while a constitutively active form of Stat3, Stat3C, is able to transform cultured cells, further pointing to an etiologic role for Stat3 in these tumors. However, the exact mechanism of its activation as well as the role of Stat3 in these tumors, remain to be determined. This study focuses on the identification of the upstream activators of Stat3 in confluent cells as well as the role of Stat3 in this setting. A quantitative RT-PCR array experiment using mouse breast epithelial HC11 cells demonstrated a dramatic increase in the levels of secreted IL6 family cytokines, while knockdown experiments demonstrated that this increase is required for Stat3 activation. We also demonstrated that density causes a dramatic increase in levels and activity of the Rac GTPase, due to inhibition of proteasomal degradation. Furthermore, we demonstrated that expression of mutationally activated Rac(exp V12) leads to Stat3 activation through IL6 secretion, and this is required for cell motility, indicating that the gp130/Stat3 axis represents an essential effector for the regulation of key cellular functions. Examination of the role of Stat3 in confluent cultures showed that Stat3 inhibition leads to a dramatic activation of the p53 anti-oncogene. Interestingly, our results also showed that Stat3 inhibition in normal breast epithelial cells induced the p53 target, p21(exp CIP/WAF) but only at lower densities, consistent with previous results showing that p21(exp CIP/WAF) is associated with p53-mediated growth arrest
Universal symbols and cartography by Rudolf Modley( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

The broad use of maps by non-cartographers imposes on the cartographer the burden to make maps not only accurate, but to use symbols which make map-reading easier for the public. The latter requirement implies a need for universal symbols. Although there are no universal symbols today (letters, words, and figures, to a lesser extent, are dependent for their meaning on the symbology of particular cultures), there are favorable factors which could make cartography a first in the development of truly universal graphic symbols. There are three major categories of graphic symbols: pictographic, concept-related, and arbitrary symbols. Official Canadian and U.S. maps, among others, have all three symbol types represented. In order to remove this complexity and make progress toward universal symbols, at least two actions will be required: 1) agreement among the professional and governmental organizations concerned with symbols of a given country as to what symbols are currently in use, and which of these are primary candidates for standardization, and 2) organization of a permanent international agency for the development of universal symbols, perhaps as an expansion of the existing International Standards Organization. (Jlb)
Calibration Issues of Tekscan Systems for Human Pressure Assessment by Evelyn L Morin( Book )

1 edition published in 2001 in English and held by 1 WorldCat member library worldwide

The Tekscan pressure sensor system has been designed for relatively easy measurement of contact pressures between two opposing surfaces. However, several factors are known to affect Tekscan sensor output. This paper reports on two pilot studies which were done to investigate the effects of contact surface compliance and changes in the system hardware on Tekscan sensor output In the first study linear calibration curves were calculated for a single Tekscan sensor array placed on surfaces of varying compliance. The slopes of the curves and variability in both the slopes and intercepts were found to be affected by surface compliance. In the second study, absolute percentage differences in the raw output data bits between a series of Tekscan sensor-cuff combinations were calculated. These differences ranged from 5-32). The results of these studies indicate that careful attention must be paid to system set-up and calibration when using that Tekscan pressure sensor system to measure contact pressures
Evaluating Teachers. Research and Information Report by J. Dale Burnett( Book )

1 edition published in 1975 in English and held by 1 WorldCat member library worldwide

A list of the current approaches to teacher evaluation should include the following: (1) examination of student gain scores on standardized tests, (2) analysis of typical student improvement, (3) teaching performance testing, (4) teacher skill testing, (5) administrator or peer group observations and ratings, and (6) student observations and ratings. The first three approaches tend to emphasize the product dimension of teaching, whereas the latter three focus more on the process of teaching. Most of the research activities on teacher evaluation have concentrated on the molecular level of teaching--the processes and results that occur within a classroom setting--whereas administrative concerns seem to be more at the molar level--the overall workload and attendant results. One way of performing formative evaluation at the molar level while increasing teacher morale is to incorporate elements of management by objectives. This is what has been done in the Faculty Performance Objective Form designed for the faculty of education at Queen's University. This instrument (included in an appendix) can be used in overall and specific planning; as an additional form of motivation for individual faculty; and as a source of information for promotions, tenure, and firing. (Author/IRT)
Role of Hepatocyte Growth Factor Autocrine Loop in Growth and Metastasis of Breast Cancer( Book )

3 editions published between 1997 and 2000 in English and held by 1 WorldCat member library worldwide

Recent evidence has shown that hepatocyte growth factor (HGF) is upregulated in human breast cancer, and that this high level of expression is a reliable indicator of recurrence and of poor overall survival of breast cancer patients. We have recently demonstrated co-expression of HGF and HGF receptor (Met) mRNA in invasive human breast carcinomas, as well as in regions of benign hyperplasia. In contrast, most nonmalignant epithelia express Met, but not HGF. These observations suggest that aberrant expression of HGF and subsequent establishment of an autocrine HGF loop could lead to abnormal growth, tumorigenesis and metastasis. The objectives of this grant are: (a) to assess expression of HGF and Met in nonmalignant and malignant breast epithelia, (b) to examine the transcriptional and post-transcriptional mechanisms of regulation of HGF mRNA and protein, and (c) to determine if upregulating, or downregulating HGF or Met expression affects the transformed and tumorigenic phenotypes of mammary carcinoma cells in vitro and in vivo
Performance characteristics of leaky coaxial cables by James Lyle Mason( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

This work deals with guided radar and reports on the experiments and analysis that were performed to obtain information on the function of leaky coaxial cables used as radio frequency intrusion sensors. Four subjects were investigated: (1) environmental effects on the leaky coaxial cable and the guided radar system, (2) use of doppler shift caused by an intruder to determine the velocity and direction of the intruder, (3) target identification, classification and signature, and (4) a single leaky coaxial cable intrusion detection system. The most important environmental factor was moisture, either rain or snow. Results have demonstrated that the velocity of a target moving longitudinally between the leaky cable sensors can be measured, based on the doppler shift in the return signal. Rudimentary target classification has been demonstrated based on a defined target signature--the log-magnitude of the Fourier transform of the target vector. A single cable intrusion detection system was investigated which incorporated a modulation technique which allowed the intruder to be located. (Author)
Effects of Human Pregnancy on Responses to Exercise Above and Below the Ventilatory Anaerobic Threshold( Book )

2 editions published in 1997 in English and held by 1 WorldCat member library worldwide

The purpose of this contract is to study the effects of healthy human pregnancy on cardiac autonomic function (Study #1), oxygen uptake kinetics (Study #2), and acid-base regulation (Study #3) at rest and during upright cycling at intensities above and below the ventilatory anaerobic threshold (T(vent)). Study #1 is currently in progress and results to date support our hypotheses that cardiac parasympathetic nervous system activity is blunted in the resting state and that sympathetic activity is reduced during strenuous exercise above T(vent) in late gestation. Technical aspects of the study and the testing protocol have been finalized for Study #2 and data collection will begin in January 1998. Study #3 is essentially complete and supports the concept that arterialized plasma H+ is lower in the pregnant vs. nonpregnant state. However, changes in H+ induced by standardized strenuous exercise are comparable in the pregnant vs. nonpregnant state. Nonpregnant subjects may have greater reductions in the strong ion difference (SID) in response to exercise above (T(vent)), but this is compensated by a greater respiratory response and a reduced arterial plasma carbon dioxide tension. Our results to date support the hypothesis that healthy physically active women can safely adapt to short bouts of strenuous exercise in late gestation
The Role of Fps in Tumor-Associated Angiogenesis( )

3 editions published between 2002 and 2004 in English and held by 0 WorldCat member libraries worldwide

Angiogenesis plays a critical role in the development of many types of tumors, including mammary tumorigenesis REVIEWED IN (6, 7). Transgenic expression of an activated form of the cytoplamic tyrosine kinase Fps gave rise to mice with pronounced hyperplasia implicating this kinase in angiogenic mechanisms (3). Our work to date has focused on numerous aspects of the angiogenic mechanism that may potentially involve Fps which has led to several developments along this line of investigation. Many of these developments specifically address Objectives in the Statement of Work which were designed to investigate the nature of the role of Fps in angiogenesis. However, other developments have also arisen that were not originally anticipated. These developments have further illuminated how Fps may regulate angiogenic mechanisms. In addition to angiogenesis, Fps has also been implicated in coagulation, immunity, and inflammation REVIEWED IN (5), all of which are highly inter-related and are very relevant to the process of tumorigenesis. Thus, Fps may play an important role in modulating tumorigenesis not only through angiogenesis, but through these other processes as well. Understanding how Fps may fulfill this role will be crucial for developing specific therapeutics designed to combat breast cancer
Studies on Platelet-Derived Growth Factor Beta-Receptor and Hepatocyte Growth Factor Receptor c-met in Paracrine Interactions in Human Breast Cancer( )

2 editions published between 1995 and 1996 in English and held by 0 WorldCat member libraries worldwide

The overall aim of our project is to identify paracrine and autocrine mechanisms that regulate stromal-tumor cell interactions in breast cancer. We have shown that platelet-derived growth factor (PDGF) Beta-receptors, which are high affinity receptors for PDGF-BB, are upregulated in vascular endothelial cells and smooth muscle actin-expressing cells (most likely myofibroblasts) at the peri-epithelial stroma in DCIS of human breast tumors. Our results suggest that breast carcinoma cells, which secrete PDGF-BB, stimulate vascularization by endothelial cells and recruitment of myofibroblasts in the peri-epithelial stromal regions of early stage breast cancer
Assessment of Design Modifications to Final Clothe the Soldier Rucksack( )

1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide

A modification from Velco and strapping to a sewn attachment method for the shoulder straps of the Clothe the Soldier (CTS) Rucksack was evaluated for: load control, dynamic peak loading and pressure distribution to the torso. Quantitative assessment of these functional parameters was undertaken to compare the behaviour of a proposed modification to that of the currently fielded design to ensure no degradation in performance. This modification was proposed to address problems that have arisen with the current shoulder strap attachment when loads carried in the rucksack increased from 25 to approximately 45 kg. The CTS load carriage system includes the Tactical Vest (TV), the Rucksack, and a Small Pack System which have been designed to be compatible. In addition to wearing the TV and one of the packs, soldiers are increasingly attempting to wear the Fragmentation Protection Vest (FPV), with Bullet Resistant Plates (BRP) beneath the TV and Rucksack. The purpose of testing was to quantify any impact of the modified shoulder attachment design on the following parameters: a soldier's load control ability, the pressure distribution under the rucksack, the range of motion of the trunk or the mechanical energy cost of walking. Both CTS designs were tested dynamically on the Load Carriage Simulator and on the Compliance tester
Assessment of the effect of No Stay, Bent Stay or Straight Stay when the Clothe the Soldier Rucksack is Worn with the Fragmentation Vest( )

1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide

The Clothe the Soldier (CTS) load carriage system includes the Fragmentation Protection Vest (FPV) with Bullet Resistant Plates (BRP), Tactical Vest (TV), the Rucksack, and a Small Pack System which have been designed to be compatible Loads carried in the CTS rucksack often exceed the officially recommended 25 kg and are reported to approach 45 kg. Under these conditions, optimizing load distribution onto the torso becomes even more essential. The purpose of this work was to examine the effects of various stays in the rucksack (straight stays, bent stays, and no stay) on pressure effects and load distribution to the body. Results showed that wearing the FPV and TV under the rucksack will increase the compressive load on the upper body by 50 to 100 percent, depending on the stay configuration compared with wearing just the TV and Rucksack configuration. Stays bent to conform to the body were the most effective configuration while removal of the stays caused the greatest increase in compressive loads. Edges of the BRP caused multiple peak pressure points of with values on the mannikin of 60 to 110 kPa. These pressure values are expected to considerably exceed the tissue tolerance of skin and underlying muscle and are expected to result in localized skin damage and bruising
Analysis of HRAD1, a Human G2 Checkpoint Control Gene( )

3 editions published between 1999 and 2002 in English and held by 0 WorldCat member libraries worldwide

The purpose of this research is to determine the role of the hRAD1 gene in breast cancer. The research includes the generation and analysis of cell lines lacking hRAD1. The analysis includes an assessment of checkpoint proficiency and genomic instability in these cells. The research also includes a biochemical characterization of the hRAD1 protein, including its subcellular localization and protein-protein interactions with other checkpoint proteins. These other checkpoint proteins include BRCA1, hHUSl, and hRAD9. hRAD1 does not interact with BRCA1 but does form a complex with hHUS1 and hRAD9
Signal Transduction in Regulation of Autocrin HGF Expression in Breast Cancer Metastasis( )

4 editions published between 1999 and 2003 in English and held by 0 WorldCat member libraries worldwide

Increased expression of hepatocyte growth factor (HGF) and its receptor, Met, has been identified as a possible independent indicator of recurrence in breast cancer patients. Dr. Elliott's laboratory has previously shown increased expression of HGF and Met in regions of invasive human breast cancer. In addition, we have found that breast carcinoma cell lines frequently express HGF and Met, whereas most nonmalignant epithelial cell lines express Met but not HGF. Together, these results suggest that establishment of an autocrine HGF loop in carcinoma cells, and the change in transcriptional and post- transcriptional control of HGF expression is an important indicator of breast cancer progression. Therefore the objectives of my project are a) to examine the transcriptional and post-transcriptional control of HGF expression, and b) to determine the role of signaling molecules in HGF expression in breast carcinoma cells. I have shown that HGF is expressed in many breast carcinoma cell lines and in one particular cell line MCF10A1T3B additional forms of HGF are found. These additional HGF forms are likely the results of proteolytic activity and may represent one mechanism by which the breast carcinoma cells regulate the pericellular level of mature HGF. In addition, I have identified 2 regions in the HGF promoter that are responsive to increased c-Src kinase activity. I have shown previously that c-Src kinase is activated in a mouse breast carcinoma cell line, SP 1, and c-Src kinase activity is required for HGF-induced motility and anchorage-independent growth of these cells. Expression of an activated form of c-Src (Y327F) increases transcription from the HGF promoter and co-expression of Stat3 transcription factor synergistically increases HGFpromoter activity. These results suggest that c-Src tyrosine kinase activity regulates HGF expression and may be important in the establishment of an HGF autocrine loop in breast carcinoma cells
Determining the Function of the Fps/Fes Proto-Oncogene in Breast Development and Malignancy( )

2 editions published between 2004 and 2005 in English and held by 0 WorldCat member libraries worldwide

The fps/fes proto-oncogene encodes a 92 kDa protein tyrosine kinase. To understand the physiological function of Fps we have generated a knockout mouse line that lacks Fps expression. Fps-knockout female mice produce litters that gain weight more slowly than wildtype mice, and develop breast tumors more quickly than wildtype mice. These data suggest that Fps participates in regulating mammary gland development and tumorigenesis. To address these hypotheses we are examining the biological and biochemical function(Fps) of Fps in the mammary gland. To date, we have shown that Fps is expressed specifically in epithelial cells. Examination of Fps during different mammary stages has shown that expression begins to increase during pregnancy and reaches maximal levels during lactation. An upregulation of Fps tyrosine kinase activity displays a similar profile. This would suggest that Fps might regulate epithelial cell differentiation. However, morphological and histological analyses could not detect any obvious differences in the pattern or quantity of alveolar structures between wildtype and knockout mice. Examination of ducts during lactation indicates that knockout cells may have a distorted shape with respect to their apical surface being more extended into the lumen of the duct. The exact nature of this potential phenotype has not yet been fully characterized but it suggests that Fps may regulate an aspect of lactation
Identification of Hepatocyte Growth Factor Autocrine Loops in Breast Carcinomas: Possible Target for Therapeuti Intervention( )

2 editions published between 2000 and 2003 in English and held by 0 WorldCat member libraries worldwide

Hepatocyte growth factor (HGF) binding to its transmembrane receptor, Met, results in an increase in breast epithelial cell motility, morphogenesis and metastasis. ELISA methods have been used to assess the role of divalent metal cations on HGF/Met-IgG binding. Copper (11) and Zinc (11) significantly inhibited HGF/Met-IgG binding with IC50 values of 230 to 270 M each, while manganese (11) and magnesium (11) were less inhibitory with IC50 values between 5 to 15 mM and 30 to 70 mM, respectively. A concentration of 1 mM copper (11) incubated with HGF resulted in an HGF mobility shift in non-denatruing PAGE, indicating direct interaction of copper (11) with HGF, while 1 mM manganese (11) exhibited no effect. The activation of Met and cell scatter, functions both induced by exogenous HGF, were inhibited upon addition of HGF in the presence of 1 mM and 500 M copper (IT), respectively. Chemical protonation, with DEPC, of HGF histidine residues impeded the ability of 500 M copper (11) to inhibit HGF/Met-IgG binding. A proposed ribbon diagram indicates that the HGF copper (11)- binding domain contains two histidine and these histidine are in close proximity to some key residues implicated in the Met binding domain. HGF-immunoreactive secretion products, 55 kDa and 32 kDa, of the human breast epithelial carcinoma cell line, MCFl0AlT3B, were purified and inhibited HGF/Met-IgG binding. Sequencing of these products may also identify key residues implicated in the inhibition of HGF/Met binding
Regulation of Anchorage-Independent Growth in Breast Cancer: Role of Signalling by Extracellular Matrix and Growth Factors( )

3 editions published between 1995 and 1997 in English and held by 0 WorldCat member libraries worldwide

Anchorage-independent growth is a characteristic of transformed cells, however, we do not fully understand he mechanisms which allow cells to grow in the absence of adhesion and spreading. We have shown that partial depletion of fibronectin from serum reduces colony efficiency suggesting that fibronectin is required or colony growth. SPI cells express a number of B1 integrins on the cell surface, the most abundant being the ibronectin receptor a5B1. A monoclonal antibody to a5B1 (BMA5) Inhibited adhesion to fibronectin by 90% colony growth of SPI cells is positively influenced by fibronectin and negatively by collagen type I. An SPI eII clone, Cl-12-ll, adhered well to collagen type I and expressed a2B1, and grows more efficiently in agar. n contrast the clone Cl-24-L did not adhere to collagen, express a2B1 or grow efficiently in agar. Cl-12-H cells grow more efficiently than Cl-24-L or SPI cells in serum free media. This growth can be inhibited by suramin, suggesting an autocrine loop. HGF receptor on SPI cells was not reduced under anchorage- dependent conditions, however, receptor phosphorylation was reduced but can be increased by addition of xogenous HGF. These results suggest that ECM-integrin interactions and growth factors are required for anchorage-independent growth of SPI cells
Identification of Hepatocyte Growth Factor Autocrine Loops in Breast Carcinomas: Possible Target for Therapeutic Intervention( )

2 editions published between 2001 and 2002 in English and held by 0 WorldCat member libraries worldwide

Hepatocyte growth factor (HGF) binding to its transmembrane receptor, Met, results in an increase in breast epithelial cell motility, morphogenesis and metastasis. HGF-like forms have been detected as secretion products of the human breast epithelial carcinoma cell line, MCF10A1T3B. The two major products are ^56 and ^32 kDa. Recombinant HGF treatment with elastase produced the ^56 kDa HGF antagonistic product, an NK4-like form. Anion exchange chromatography of conditioned medium indicated that MCF10A1T3B secretion products have decreased affinity compared to endogenous full-length HGF
Clothe the Soldier Prototype Modular Load Carriage System Design Assessment using the APLCS Load Carriage Simulator( )

1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide

The objective of this study was to conduct a standardized assessment of the CTS prototype modular (M1) pack on a computerized Load Carriage (LC) Simulator. Specifically, the LC Simulator measured variables which assess load control and load transfer capability of the M1 pack. These aspects of pack design were comprised of several displacement, force, moment and pressure variables that had been validated on previously tested systems where LC Simulator outputs were compared to assessments by experienced users during human trials
 
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