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Simulating longitudinal phase space in the SLC, from the damping rings to the final focus
No full textAt high currents the longitudinal phase space of the SLC beam is not simply described by gaussian distributions in both position and energy. The distorted ring beam, the curvature of the compressor rf, the limited energy aperture of the RTL, the wakefields in the linac, and the momentum compaction in the arc all contribute to some extent to a distortion of longitudinal phase space. In this paper we present simulation results that describe the phase space of the SLC beam, from the damping rings to the final focus area, and that include all these distorting effects. From bunch length measurements in the SLC it was discovered that the damping ring beam is lengthened and is clearly not gaussian. One author describes a potential well calculation for the ring bunch shape that agrees remarkably well with the measurements. These calculated shapes are the starting point for the simulations described in this paper. These initial distributions are propagated through the RTL, then the linac, and then the arcs. We will address questions of the bunch shape, beam tilt, beam loss, and tail population at the end of the RTL. Following this we discuss the energy spectrum at the end of the linac and the bunch shape when the beam reaches the final focus. Finally, in Appendix A we describe a method of measuring the bunch shape and the induced voltage in the SLC linac. 22 refs., 9 figs
Gemmeleg. Performance for the Feral Cello. Sound Music Computing Conference, Helsinki... 5 Jul 2017-8 Jul 2017
No full textGemmeleg by Laura Reid performed on the "Feral Cello" developed by Tom Davis at SLC Helsinki July 201
Trends and uncertainties of mass-driven sea-level change in the satellite altimetry era
No full textOcean mass change is one of the main drivers of present-day sea-level change (SLC). Also known as barystatic SLC, ocean mass change is caused by the exchange of freshwater between the land and the ocean, such as melting of continental ice from glaciers and ice sheets, and variations in land water storage. While many studies have quantified the present-day barystatic contribution to global mean SLC, fewer works have looked into regional changes. This study provides an analysis of regional patterns of contemporary mass redistribution associated with barystatic SLC since 1993 (the satellite altimetry era), with a focus on the uncertainty budget. We consider three types of uncertainties: intrinsic (the uncertainty from the data/model itself), temporal (related to the temporal variability in the time series) and spatial–structural (related to the spatial distribution of the mass change sources). Regional patterns (fingerprints) of barystatic SLC are computed from a range of estimates of the individual freshwater sources and used to analyze the different types of uncertainty. Combining all contributions, we find that regional sea-level trends range from −0.4 to 3.3 mm yr−1 for 2003–2016 and from −0.3 to 2.6 mm yr−1 for 1993–2016, considering the 5–95th percentile range across all grid points and depending on the choice of dataset. When all types of uncertainties from all contributions are combined, the total barystatic uncertainties regionally range from 0.6 to 1.3 mm yr−1 for 2003–2016 and from 0.4 to 0.8 mm yr−1 for 1993–2016, also depending on the dataset choice. We find that the temporal uncertainty dominates the budget, responsible on average for 65 % of the total uncertainty, followed by the spatial–structural and intrinsic uncertainties, which contribute on average 16 % and 18 %, respectively. The main source of uncertainty is the temporal uncertainty from the land water storage contribution, which is responsible for 35 %–60 % of the total uncertainty, depending on the region of interest. Another important contribution comes from the spatial–structural uncertainty from Antarctica and land water storage, which shows that different locations of mass change can lead to trend deviations larger than 20 %. As the barystatic SLC contribution and its uncertainty vary significantly from region to region, better insights into regional SLC are important for local management and adaptation planning.Physical and Space Geodes
Comparison between early and late stage lung cancer in relation to cost and mortality
No full textLung cancer (LC) is a life threatening disease associated with significant cost and high mortality. LC is diagnosed in either early stage or more frequently in late stage, the face of lung cancer. Objective: To make a comparison between early and late stage lung cancer (SLC) in relation to cost and mortality Methods: The study is a random effects data analysis of a historical dataset the Nationwide Inpatient Sample (NIS). The study is based on the time period 2002, 2006 and 2011. The primary outcomes of interest is cost (total cost per day) and mortality (died/did not die). Two replicates samples for the years 2002, 2006 and 2011 were taken. Demographic factors that influence cost and mortality were co-varied out of the analysis. Descriptive Statistical analysis and bivariate analysis were done for cost includes ANOVA and ANCOVA. A statistical analysis for mortality includes logistic regression. Cost and mortality for early versus late (SLC) were measured in isolation and after accounting for age, gender, race, socio-economic status, number of diagnoses, length of stay, and number of procedures.Results: In the three years, 3 samples of 2173, 13,032, and 15,771 including 3 replicate samples of 2060, 13,032 and 15,772 participated in the study. All significant relationships tested at an alpha level of (P<0.05). The cost for early (SLC) was higher compared to late (SLC) and is statistically significant. The number of procedures in part accounted for the difference. Late (SLC) had higher mortality compared to early (SLC) and is statistically significant. The number of diagnoses in part accounted for the difference. The study showed early (SLC) costs 14% more than late (SLC). Late stage is more deadly, however, the gap is surprisingly small at 30% or an odds ratio of 1.3 to 1.5 after adjusting for covariates. Conclusion: This study of HCUP data revealed that early (SLC) is more expensive than late (SLC). Additionally, the data revealed that mortality is higher in late (SLC) compared to early (SLC). Overall, these finding highlight the important role of Health Informatics in understanding the cost and mortality of early and late (SLC).Ph.D.Includes bibliographical referencesby Kathleen A. Hardin
Difference in ninth-grade student performance between small learning communities and traditional high school models, 2012
No full textThe purpose of this causal-comparative research study was to determine the extent to which ninth-grade student performances are impacted by the small learning community model. The urban high school of interest performed higher than the district in all accountability areas, and was comparable to the state in all areas except ninth-grade on track performance. Transforming this urban school district into small learning conmiunities was planned in order to address the needs of students with the ultimate goal of increasing the graduation rate and lowering the dropout rate. The urban school district being investigated in this study began the SLC transformation process with one school. That high school went from a comprehensive high school traditional model with a magnet program to the SLC model with four different academies. This one comprehensive school is phasing the SLC academies in by grade level. This affords the school the ability to make adjustments as the model is phased in during 4 years. The SLC model and traditional model of high school and the impact of the school model on ninth-grade student performance measures. It was proposed that the following variables were directly related to ninth-grade student achievement: number of absences; scores on the science, mathematics, and literature EOCTs; number of disciplinary referrals; GPA; and grade promotion. An investigation was also conducted to determine if there was a relationship between school model, gender, and student performance. Teacher perceptions are analyzed to determine their reflections on the processes for any correlations to the student outcomes. The study was designed to determine if those basic needs are met through the SLC model or the traditional school model. The Statistical Package for Social Sciences (SPSS) to analyze the data. Analyses of variance were used to compare six of the dependent variables between the two school models and for comparisons of these same variables among the four academies. The interviews were transcribed and coded to established dominant and emergent themes as it related to ninth-grade student achievement. Based on the findings, there were statistically no differences between the SLC and traditional school model for the ninth grade measures such as EOCT scores in mathematics, science, and English, grade point average and the number of disciplinary referrals. In addition, students enrolled in the traditional school model had significantly fewer absences, and there were a larger percentage of ninth grades students promoted in the traditional model than students who were enrolled in the SLC model. The researcher concludes that in year one of the implementation of the SLC model there was no significant impact on ninth grade student outcomes
Towards Indigenous Literary Nationalisms: Interpreting Monkey Beach and The Marrow Thieves
No full textThis paper was originally written for Deanna Reder’s English/Indigenous Studies 360 course Popular Writing by Indigenous Authors. The assignment asked students to write a compare and contrast essay on the novels Monkey Beach by Haisla-Heiltsuk author Eden Robinson and The Marrow Thieves by Métis author Cherie Dimaline, drawing on at least one academic article for analysis. The paper uses MLA citation style.
In this paper, I argue that Indigenous literary nationalism, a method of Indigenous literary criticism which seeks to understand Indigenous literatures through their own cultural contexts, is applicable to understanding both culturally specific and pan-Indigenous instances of Indigenous literature. Using Eden Robinson’s Monkey Beach and Cherie Dimaline’s The Marrow Thieves as examples of the former and latter categories respectively, I conclude that Indigenous literary nationalism may be rethought more appropriately as Indigenous literary nationalisms, at once incorporating culturally specific Indigenous contexts while making room for pan-Indigenous potentialities
Media Analysis of “Nosedive” (Black Mirror):: A Symbolic Interactionist Perspective
No full textThis paper was originally written for Dr. Kyle Willmott SA150 course Introduction to Sociology. The assignment asked students to write an essay applying the knowledge of sociological concepts learned in class to analyze a form of media. The paper uses Chicago Author-Date citation style
Use of subarrays in linear array for improving wide angular scanning performance
No full textThe scanning performance of wide-angular scanning linear arrays is primarily degraded by the limited angular profile of the employed elements' patterns. This paper introduces an innovative strategy for compensating this degradation by using subarrays. Our design uses a uniform linear array with half-wavelength spaced elements, supplemented by subarrays that are symmetrically placed at its edges. The employed subarrays have controlled patterns, favoring some directions for effective scan-loss compensation (SLC) and suppressing other directions for lowering the sidelobes level (SLL). Two types of feeding configurations, making use of fixed power dividers in combination with 1-bit phase switch, are used for producing the desired patterns. The complete array design and physical validation, starting from the elements, continuing with the subarrays and ending with the system integration are also discussed in detail. The integration of the subarrays yields notable performance improvements at large scanning angles when compared with uniform linear arrays. The peak and first SLL of -14.1 dB, and the SLC of 2 dB are obtained when the array with CUP antennas as elements is scanned to the maximum scan angle direction.International Research Centre for Telecommunication and RadarElectrical Engineering Educatio
Stored Stallion Sperm Quality Depends on Sperm Preparation Method in INRA82 or INRA96 [Elektronisk resurs]
No full textRemoval of seminal plasma facilitates stallion sperm survival during storage, but washing may damage sperm chromatin. Therefore, sperm quality was compared in samples following single-layer centrifugation (SLC) or sperm washing and controls (extension only) in two extenders, INRA82 and INRA96. Ejaculates from six stallions were split among six treatments: SLC, sperm washing, and controls, in INRA82 and INRA96. Sperm motility and acrosome status were evaluated at 0, 24, 48, 72 and 96 hours; morphology at 0, 24, 48, 72 hours and chromatin integrity at 0 and 96 hours, with storage at 6 degrees C. Sperm samples in INRA96 had better motility, acrosome status, and normal morphology than samples in INRA82. The SLC samples had higher motility and fewer reacted acrosomes than controls, and lower fragmented chromatin than washed samples. Fewer spermatozoa with tail defects were observed after SLC than after sperm washing; spermatozoa washed in INRA82 had fewer tail defects than those washed in INRA96. In conclusion, sperm quality (except for morphology) was better in INRA96 than in INRA82 and was better in SLC samples than in washed samples or controls. The SLC method is a useful adjunct to stallion sperm preparation, especially for storage before artificial insemination. (C) 2020 The Author(s). Published by Elsevier Inc
Stored Stallion Sperm Quality Depends on Sperm Preparation Method in INRA82 or INRA96
No full textRemoval of seminal plasma facilitates stallion sperm survival during storage, but washing may damage sperm chromatin. Therefore, sperm quality was compared in samples following single-layer centrifugation (SLC) or sperm washing and controls (extension only) in two extenders, INRA82 and INRA96. Ejaculates from six stallions were split among six treatments: SLC, sperm washing, and controls, in INRA82 and INRA96. Sperm motility and acrosome status were evaluated at 0, 24, 48, 72 and 96 hours; morphology at 0, 24, 48, 72 hours and chromatin integrity at 0 and 96 hours, with storage at 6 degrees C. Sperm samples in INRA96 had better motility, acrosome status, and normal morphology than samples in INRA82. The SLC samples had higher motility and fewer reacted acrosomes than controls, and lower fragmented chromatin than washed samples. Fewer spermatozoa with tail defects were observed after SLC than after sperm washing; spermatozoa washed in INRA82 had fewer tail defects than those washed in INRA96. In conclusion, sperm quality (except for morphology) was better in INRA96 than in INRA82 and was better in SLC samples than in washed samples or controls. The SLC method is a useful adjunct to stallion sperm preparation, especially for storage before artificial insemination. (C) 2020 The Author(s). Published by Elsevier Inc
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