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This research explored the relationship between an earlier-year technical course and one later year technical course, for students who graduated between 2010 and 2015 with the degree of bachelor of engineering. The research only focuses on the courses in the program of Electrical Engineering at the University of Victoria. Three approaches based on the two major factors, coefficient and enrolment, were established to select the course grade predictor including Max(Pearson Coefficient), Max(Enrolment), and Max(Pi) which is a combination of the two factors. The prediction algorithm used is linear regression and the prediction results were evaluated by Mean Absolute Error and prediction precision. The results show that the predictions of most course pairs could not be reliably used for the student performance in one course based on another one. However, the fourth-year courses are specialization-related and have relatively small enrolments in general, some of the course pairs with fourth-year CourseYs and having acceptable MAE and prediction precision could be used as early references and advices for the students to select the specialization direction while they are in their first or second academic year. / Graduate

Thesis (M.A.)--University of Wisconsin--Madison, 1969. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

GALVÃO, Maria Andreia Alves. Associação entre medidas morfométricas e ultrassonográficas na estimação da produção de leite de caprinos leiteiros. 2016. 55 f. Dissertação (Mestrado em Zootecnia)- Universidade Federal do Ceará, Fortaleza, 2016. / Submitted by Weslayne Nunes de Sales (weslaynesales@ufc.br) on 2017-03-23T13:21:17Z No. of bitstreams: 1 2016_dis_maagalvão.pdf: 1244774 bytes, checksum: 74e542f9db04c36102345d2c0b17e14b (MD5) / Approved for entry into archive by Jairo Viana (jairo@ufc.br) on 2017-03-23T18:22:04Z (GMT) No. of bitstreams: 1 2016_dis_maagalvão.pdf: 1244774 bytes, checksum: 74e542f9db04c36102345d2c0b17e14b (MD5) / Made available in DSpace on 2017-03-23T18:22:04Z (GMT). No. of bitstreams: 1 2016_dis_maagalvão.pdf: 1244774 bytes, checksum: 74e542f9db04c36102345d2c0b17e14b (MD5) Previous issue date: 2017 / The aim of this study was to evaluate the associations between morphometric and ultra-sound measurements and the milk yield of goats, to identify of animals with better production efficiency. Thirty-six does 18 from Saanen breed and 18 from Anglo-Nubian breed. The measured morphological traits were: udder depth (UD), udder width (UW), distance from the teat to the ground (DCG), distance between teat (DBT), length (LT) and diameter of the teat (DT). The ultra-sonographic traits analyzed were: teat canal length (TCL), teat diameter (TD), wall thickness of the teat (WTC), cistern area of the teat (CAT) and cistern area of the gland (CAG). Daily milk yield (MY) was estimated as the average of the last test-day milk yield. In both breeds, there was no significant associations between morphometric/ultra-sonographic traits and the milk yield. Only CAG was correlated with MY (r = 0.57; P <0.05), in the Anglo-Nubian breed, and UW (r = 0.48; P <0.05) in Saanen breed. In the Anglo-Nubian breed, longer and larger diam-eter teat tend to increase the proximity of the udder to the ground, while this is more evident in deeper udders in Saanen breed. In both breeds, longer teat also feature larger diameter. The canonical correlation analysis showed that the sets of morphometric and ultra-sonographic traits present high association (r = 0.9455). The first canonical pair explained 93.21% of the total variation contained in the data set. DC, LC and DCG traits were the most associated with the set of ultra-sonographic canonical variables, while DC and CAT were most associated with the set of morphological canonical varia-bles. The morphological traits to be measured to aid the production of goat milk depend on the breed into consideration, which may be a function of up selective history of this breed. The measurements carried out on the teat have higher correspondence with those performed with ultrasound than those measured in the udder. Length and diameter of the teat and its ground clearance are the most should be considered as an aid to selection for milk production in goats. / O objetivo do presente estudo foi avaliar as associações entre medidas morfométricas e ultrassonográficas e a produção de leite em caprinos, para identificar animais com me-lhor eficiência de produção. Foram utilizadas trinta e seis cabras, sendo 18 da raça Saa-nen e 18 da raça Anglo-nubiana. As características morfológicas mensuradas foram pro-fundidade do úbere (PU), largura do úbere (LAR), distância do teto ao solo (DTS), dis-tância entre tetos (DET), comprimento (CT) e diâmetro do teto (DT). As características avaliadas por ultrassonografia foram comprimento do canal do teto (CCT), diâmetro do teto (DTU), espessura da parede do teto (ESPT), área da cisterna do teto (ARCT) e área da cisterna da glândula (ARCG). A produção de leite diária (PL) foi representada pela média dos últimos três controles leiteiros. Houve poucas associações significativas entre as características morfológicas/ultrassonográficas com a produção de leite nas duas ra-ças. Somente ARCG foi correlacionada com PL (r = 0,57; P<0,05), na raça Anglo-nubiana, e LAR (r = 0,48; P<0,05) na raça Saanen. Na raça Anglo-nubiana, tetos mais compridos e com maior diâmetro tendem a aumentar a proximidade do úbere ao solo, enquanto isso é mais evidente em úberes mais profundos, na raça Saanen. Em ambas as raças, tetos mais compridos também apresentam maior diâmetro. A análise de correlação canônica demonstrou que os conjuntos de características morfométricas e ultrasso-nográficas apresentam alta associação (r = 0,9455). O primeiro par canônico explicou 93,21% da variação total contida no conjunto de dados. As características DT, CT e DTS foram as mais associadas com o conjunto de variáveis canônicas ultrassonográficas, enquanto DT e ARCT foram as mais associadas com o conjunto de variáveis canônicas morfológicas. As características morfológicas a serem mensuradas para auxiliar a PL de cabras dependem da raça em consideração, o que pode estar em função do histórico seletivo desta raça. As mensurações realizadas nos tetos apresentam maiores cor-respondências com as realizadas com o ultrassom do que aqueles mensuradas no úbere. Comprimento e diâmetro dos tetos e sua distância ao solo são as que mais devem ser consideradas como auxiliares à seleção para produção de leite em caprinos.

Experiments were performed in which liquid droplets were videographically recorded impacting horizontal superhydrophobic surfaces. The superhydrophobic surfaces were micropatterned with alternating ribs and cavities and coated with a hydrophobic coating. The following surface types were also tested for comparison: smooth uncoated, micropatterned uncoated, and smooth coated surfaces. Three liquid types were used: pure water, ethanol, and a 50/50 water/glycerine mixture. Acquired data demonstrated that the maximum droplet spread diameter exhibited a greater Weber number dependence than that previously reported in the literature. The time delays between impact and maximum spread and between impact and ejection of a vertical jet were characterized, and it was found that experiments with hydrophilic surface behavior follow somewhat different trends than those with hydrophobic behavior, and that there are modest differences between superhydrophobic and hydrophobic surfaces. When analyzing the velocity of the issuing vertical jet, a region of micro-jets was observed with velocities that, under certain conditions, can exceed 15 times the impact velocity. The experimental data acquired were also compared to two recent models from the literature and it was determined that the models do not adequately account for surface anisotropy or apparent slip at the solid-liquid interface. The experiments also showed that instabilities resulting in fingering are dependent upon surface and fluid type, but not contact angle. The onset of peripheral splashing was observed, in general, to occur at a lower Weber number as contact angle increased for the differing surfaces. For surfaces with rib and cavity features, the droplet spread and retraction were generally observed to be asymmetric with spread and retraction faster along the length of the ribs. The occurrence of two-pronged and oscillating jets for water/glycerine tests was also observed for all patterned surfaces. Lastly, an interesting spread pattern with four liquid droplets clustered at about 30° from the perpendicular direction was observed for all fluid types on patterned surfaces for high Weber numbers.

Financial data, such as daily or monthly maximum log return of stock price usually possess heavy tail and skewness properties. In this thesis, we consider stock price data of computer hardware and money center banks. Heavy-tailed distributions including Pearson type IV, Pearson type VII and stable distribution were fitted to the daily log return of the data sets, and goodness of fit were compared. For the monthly maximum log return, nonlinear threshold time series models were fitted with heavy tailed innovation distributions. In addition, the value at risk and volatility of the data sets are derived from the fitted distributions.

ABSTRACT ROBUSTNESS OF TWO FORMULAS TO CORRECT PEARSON CORRELATION FOR RESTRICTION OF RANGE by Dung Minh Tran Many research studies involving Pearson correlations are conducted in settings where one of the two variables has a restricted range in the sample. For example, this situation occurs when tests are used for selecting candidates for employment or university admission. Often after selection, there is interest in correlating the selection variable, which has a restricted range, to a criterion variable. The focus of this research was to compare Alexander, Alliger, and Hanges’s (1984) formula to Thorndike’s (1947) formula and population values using Monte Carlo simulation when the assumption of normal distribution is violated in a particular way. In both Thorndike’s and Alexander et al.’s correction formulas, values for the variances in the restricted and the unrestricted situations are required. For both formulas, the variance in restricted situations was a sample estimate. In the Monte Carlo simulation, the difference between the two approaches was that in Thorndike’s formula, the variance in the unrestricted situation was the population variance from the exogenous variable, whereas in Alexander et al.’s approach, the population variance was estimated based on the sample variance in the restricted situation. In the simulation, robustness situations were created from non-normal distributions for predicted group membership in a classification problem. As expected, Thorndike’s corrected correlation values were more accurate than Alexander et al.’s corrected correlation values, and Thorndike’s formula had a smaller standard error of estimates. Absolute values of the mean differences between the estimated and population correlations for Alexander et al.’s approach compared to Thorndike’s approach in robustness situations ranged from 1.37 to 2.15 larger. Nevertheless, Alexander et al.’s approach, which is based only on estimated variances, appears to be a worthwhile correction in most of the simulated situations with a few notable exceptions for non-normal distributions.

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This study focuses on the ten most valued groups on the Nasdaq Stockholm exchange and their reported results for the period of 2009-2015. The purpose of the study was to investigate correlation between reported results on different levels and the progress of the share prices. Using Pearson’s correlation coefficient I was able to compare operating profit, net result and other comprehensive income to one another. I found that operating profit and net result came very close to each other, whilst other comprehensive income fell behind.  As it seems, share prices are affected by a numerous of variables, not only by reported results and earnings.

The present journal article formatted dissertation assessed the characteristics of effect sizes of commonly used statistical techniques. In the first study, the author examined the American Educational Research Journal (AERJ) and select American Psychological Association (APA) and American Counseling Association (ACA) journals to provide an historical account and synthesis of which statistical techniques were most prevalent in the fields of education and psychology. These reviews represented a total of 17,698 techniques recorded from 12,012 articles. Findings point to a general decrease in the use of the tvtest and ANOVA/ANCOVA and a general increase in the use of regression and factor/cluster analysis. In the second study, the author compared the efficacy of one Pearson r2 and seven multiple R2 correction formulas for the Pearson r2. The author computed adjustment bias and precision under 108 conditions (6 population p2 values, 3 shape conditions and 6 sample size conditions). The Pratt and the Olkin-Pratt Extended formulas more consistently provided unbiased estimates across sample sizes, p2 values and the shape conditions investigated. In the third study, the author evaluated the robustness of estimates of practical significance (n2, e2 and w2) in one-way between subjects univariate ANOVA. There were 360 simulation conditions (5 population Cohen's d values, 4 group proportion ratios, 3 shape conditions, 3 variance conditions, and 2 total sample size conditions) for each of three group configurations (2, 3 and 4 groups). Three indices of practical significance (n2, e2, w2) and two indices of statistical significance (Type I error and power) were computed for each of the 5,400, 000 (5,000 replications x 360 simulation conditions x 3 group configurations). Simulation findings for n2 under heterogeneous variance conditions indicated that for the k=2 and k=3 condition Cohen's d values up to 0.2 (up to 0.5 for k=4) tend to produce overestimated population n2 values. Under heterogeneous variance conditions for e2 and w2 at Cohen's d = 0.0 and 0.2, the negative variance pairing overestimated and the positive variance pairing underestimated the parameter n2 but at Cohen's d greater than or equal to 0.5, both the positive and negative variance conditions resulted in underestimated parameter n2 values.