A statistical, spatial, and hydrologic comparison of gauge-based and MPE-based rainfall measurements

2017 ◽  
Vol 124 (1-4) ◽  
pp. 11-23
Author(s):  
Richard Bernatz
Keyword(s):  
Goodness Of Fit ◽  
Correlation Coefficients ◽  
Relative Bias ◽  
Rainfall Time Series ◽  
Spatial Correlations ◽  
Event Time ◽  
Moment Coefficient ◽  
Significant Difference ◽  
Precipitation Estimation ◽  
The Difference

Gauge-based and multi-sensor precipitation estimation (MPE) data are compared on hourly, daily, monthly and event time scales at site locations over a 12-year period. Gauge data is collected at 16 sites within a 950 km2 portion of the Upper Iowa River in northeast Iowa. Average relative MPE bias is positive for all but the event time scale, and has a magnitude of less than 0.10 for all scales. Gauge and MPE average correlation coefficients range from 0.73 on the hourly scale to 0.92 on the event and monthly scales. The MPE relative bias standard deviation decreases from 1.70 mm on the hourly scale to 0.27 mm on the monthly scale. Decomposition of hourly bias reveals that the false positive portion is the most significant component. Seventy percent of MPE accumulation have a relative bias of 0.5 or less when hourly accumulations are 7 mm or greater. Pearson product-moment coefficient analysis reveals strong similarities in spatial correlations as a function of site separation. Rainfall time series for the basin are constructed from the two data sources and used as input to a Blocked Topmodel rainfall runoff scheme to provide another means of comparison on a basin-wide spatial scale. Five goodness-of-fit measures are used for quantifying the viability of simulated flows. No statistically significant difference in annual means using the difference sources is found for any of the measures.

scholarly journals Estimation of phenotypic variability of body measurements in Lipizzan mares

2019 ◽  
Vol 35 (4) ◽  
pp. 399-408
Author(s):  
Biljana Rogic ◽  
Bozo Vazic ◽  
Ivica Ravic
Keyword(s):  
Body Shape ◽  
Average Length ◽  
Phenotypic Variability ◽  
Correlation Coefficients ◽  
The Body ◽  
Body Measurements ◽  
Simple Analysis ◽  
Horse Breed ◽  
Significant Difference ◽  
The Difference

The aim of this work was a phenotypic description of the mare families of a Lipizzan horse breed from stud Vucijak. A total of 31 mares were measured, for every animal 28 measures were recorded. The mares are distributed by mare families in the following: Sana (3), Lipa (3), Bregava (3), Cremica (3), Ukrina (3), Visla (2), Neretva (3), Pliva (1), Drina (2), Sutjeska (2), Sitnica (1), Janja (2) and Sava. Simple analysis of variance was done to determine the difference in the morphological measures between mare families. Also, correlation between 28 measures was done. This study revealed phenotypic uniformity between mare families. Of the 28 measures recorded, a statistically significant difference was identified only for the length of cannon (front leg). The longest average length of the cannon (front leg) had at Sana (24.67 cm), and the shortest at Bregava (19.00 cm). The correlation ranged from slightly negative to highly positive with correlation coefficients from -0.465 to 0.779. Significant and highly significant correlation with height, length and depth was found in mare measures. The body shape of the mare families has a rectangular, which is in accordance with the Lipizzan horses from other stud in Europe. Also, the study revealed that mares from Vucijak are smaller than mares from other stud, which is in accordance with the breeding goals.

scholarly journals The Relationship between Resilience and Academic Burnout among Nursing and Midwifery Students in Kermanshah, Iran

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Maryam Janatolmakan ◽  
Yousef Torabi ◽  
Shahab Rezaeian ◽  
Bahare Andayeshgar ◽  
Amirabbas Dabiry ◽  
...  
Keyword(s):  
Linear Regression Analysis ◽  
Correlation Coefficients ◽  
Maslach Burnout Inventory ◽  
Cross Sectional Study ◽  
Student Survey ◽  
Cross Sectional ◽  
Academic Burnout ◽  
Significant Difference ◽  
The Mean ◽  
The Difference

Background. Nursing and midwifery students have relatively high levels of academic burnout. One of the mechanisms to combat this issue is resilience. The results related to the association between academic burnout and resilience indicate a negative association, but various studies have reported different correlation coefficients. Therefore, the current study was aimed to investigate the association between resilience and academic burnout among nursing and midwifery students. Methods. A total of 240 nursing and midwifery students were recruited in this cross-sectional study using stratified random sampling. Data were collected by a demographic information questionnaire, the Connor–Davidson Resilience Scale (CD-RISC), and the Maslach Burnout Inventory-Student Survey (MBI-SS). Data were analyzed by SPSS-16 using t-test, ANOVA, Spearman’s correlation coefficient, and linear regression analysis. Results. The mean scores of academic burnout for nursing and midwifery students were 41.4 ± 14.8 and 41.2 ± 12.3, respectively, but the difference was not statistically significant ( p  = 0.368). The mean scores of resilience for nursing and midwifery students were 58.1 ± 13.3 and 52.9 ± 13.9, respectively, which showed a statistically significant difference ( p  = 0.004). Resilience was significantly inversely correlated with academic burnout in nursing and midwifery students (r = −0.04, p  < 0.001; r = −0.39, p  < 0.001). Increased resilience in students decreased academic burnout ( p  < 0.001). Conclusion. Academic burnout was moderate in nursing and midwifery students, but resilience was relatively high. Given the negative correlation between resilience and academic burnout, it is necessary to strengthen resilience skills and reduce factors that cause academic burnout.

scholarly journals Reproductive ability of cows and their descendants of different generations

2018 ◽  
Vol 20 (89) ◽  
pp. 114-121
Author(s):  
S. I. Fyl ◽  
E. I. Fedorovych ◽  
P. V. Bodnar
Keyword(s):  
Correlation Coefficients ◽  
Reproductive Function ◽  
Reproductive Capacity ◽  
Reproduction Rate ◽  
Mothers And Daughters ◽  
Black And White ◽  
Reproductive Ability ◽  
Service Period ◽  
Significant Difference ◽  
The Difference

The research was carried out on cows of Ukrainian Black-and-White Dairy breed and their descendants of the first and second generations on the conditions of LLC “Veletenj” in the Glukhiv district of the Sumy region. In cows, based on a retrospective analysis of data and the results of their own searches, was studied the age dynamics of reproductive capacity of cows for the first-seventh and higher lactation, and their daughters and granddaughters for the first and higher lactation. It has been established that reproductive ability of cows to some extent is due to their age. Depending on the lactation, the duration of the parturition of the cows of LLC “Veletenj” varied from 278.2 to 280.0, the duration of the indifference period – from 64.4 to 69.0 days, service period – from 123.5 to 136.4, inter-calving period – from 402.2 to 414.8 and in the dry stable period – from 61.3 to 75.8 days, the reproduction rate was 0.91–0.93, the calves output for 100 cows was 90.9–93.0 the index of insemination is 2.41–2.56 and the fertility index is 42.2–44.8. The results of our research indicate that each subsequent generation of cows was characterized by a better reproductive ability, which, in our opinion, is due to the timely abandonment of fetuses and stimulation of infertile cows, as well as an improved level of feeding. The difference in the duration of the service period for the first lactation between the mothers and their daughters was 24.5, for the best lactation – 24.8, for the duration of the interotional period – 24.8 and 23.7 days, respectively, at P < 0.001 in all cases. A more significant difference in reproductive performance was observed between cows and their granddaughters. In terms of the duration of the service period for the first and best lactation, it was 15.5 (P < 0.05) and 33.3 (P < 0,001) and interotional period – 17.3 (P < 0.05) and 33,2 days (P < 0.001) respectively. Between the majority of the studied reproductive abilities of mothers and daughters for the first and higher lactation, the relative variability was positive and reliable, and mothers and granddaughters – low uncertainty and mostly negative (exception – the duration of calving). The highest positive correlation coefficients were observed between the duration of cervix and their daughters (r = 0.113 ± 0.039 at P < 0.001) and granddaughters (r = 0.211 ± 0.088 at P < 0.05) for the first lactation, as well as mothers and daughters for higher lactation (r = 0.114 ± 0.039 at P < 0.01). Between indicators of the indifference period (r = -0.036–0.051) and the index of fertility of cows (r = -0.080–0.014) and their descendants for the lactation under investigation have low, multidirectional, unreliable connections. The influence of mothers on indicators of reproductive function of descendants is established. They made the most significant impact on the duration of service and inter calving periods, reproduction rate, calving out of 100 cows and the index of daughter insemination (ηx2 = 27.57–52.22%). For higher lactation, this effect was significantly lower (exception – the index of insemination) – ηx2 = 15,39–28,10%.

scholarly journals The reliability and reproducibility of an Android cephalometric smartphone application in comparison with the conventional method

2020 ◽  
Author(s):  
Obada M. Zamrik ◽  
Haluk İşeri
Keyword(s):  
Conventional Method ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Smartphone Application ◽  
Linear Measurement ◽  
Significant Difference ◽  
The Difference ◽  
Clinically Significant ◽  
Mean Differences ◽  
Tracing Techniques

ABSTRACT Objectives To assess the reliability and reproducibility of linear and angular measurements of the cephalometric smartphone Android application OneCeph in comparison with the conventional method. Materials and Methods A total number of 22 landmarks were registered, and 26 skeletal and dental cephalometric parameters were measured on 30 pretreatment cephalograms. The measurements for both digital (OneCeph) and conventional tracings were performed twice with a 4-week interval. The reliability (intraexaminer error) was evaluated by using the Pearson correlation coefficient. The variation in measurements between the tracing techniques (reproducibility) was determined by paired t-test. Results The Pearson correlation coefficients of all cephalometric measurements for each tracing technique were ≥ 0.95. Significant differences between the two tracing techniques were detected in five measurements (SNB angle, N I to Pog linear measurement, U1-Apoint linear measurement, U lip to S line, and nasiolabial angle; P &lt; .05). Conclusions Using 26 measurements to compare both tracing methods, all mean differences between the digital (OneCeph) and conventional methods were below 1 degree/1 mm, indicating that differences between the tracing methods were clinically insignificant. The U1-A point measurement was an exception for the digital method (OneCeph) with a clinically significant difference of 1.25 mm (P &lt; .01); the difference was a result of wrongly measuring the distance from the A line to the incisor edge of the upper central incisor rather than the facial surface of the upper incisor. This leads to the conclusion that both tracing methods were reliable for daily clinical practice.

scholarly journals Determination of the concentration of Fe, Se and Zn elements in nails of Vietnamese women with breast cancer using k0-INAA method

2020 ◽  
Vol 22 (4) ◽  
pp. 370-377
Author(s):  
Phuong Truc Huynh ◽  
Tran Pham Ngoc Trinh ◽  
Dinh Thanh Binh ◽  
Nguyen Thi Truc Linh ◽  
Truong Thi Hong Loan ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Trace Elements ◽  
Analytical Data ◽  
Correlation Coefficients ◽  
Breast Cancer Diagnosis ◽  
Healthy Women ◽  
Vietnamese Women ◽  
Significant Difference ◽  
The Difference

Introduction: Breast cancer is the most common type of cancer resulting in death. Trace elements of Fe, Se and Zn can play a key role in the onset and prevention of breast cancer. Trace elements in the fingernails may be used as bioindicators for breast cancer diagnosis. The purpose of this work is to determine the concentrations of Fe, Se, and Zn in the fingernails of women with breast cancer and healthy women, which used to find the difference and correlation of these elements in the fingernail. Methods: This research was approved by the Ethics Committee of Dong Nai General Hospital. The fingernail collected from 29 women with breast cancer and 30 healthy women, who are the same age and living in Dong Nai province, Vietnam. The concentrations of Fe, Se, and Zn in the fingernails were determined using the k0-INAA method. The analytical data were evaluated using some statistical analysis for the correlation of trace elements in the fingernails of both groups. Results: As a result, the mean concentrations of Fe, Se and Zn in fingernails of women with breast cancer were 102.87 ug/g, 0.75 ug/g and 65.49 ug/g, respectively, while those of healthy women were 69.74 ug/g, 0.78 ug/g and 107.75 ug/g. The assessment of these elements in fingernails for both two sample groups, including t-test and correlation coefficients, was also carried out in this study. As a result, the significant difference (p < 0.05) was found for the Fe and Zn in fingernails of women with breast cancer, while those of Se was not found. The correlation between Se and Zn was found in both groups. The correlation between Fe and Zn was found in fingernails of healthy women, but it disappears in the women with breast cancer. Conclusions: From our finding, it can be concluded that Fe and Zn significantly associated with the risk of breast cancer, while Se is not associated.  

scholarly journals Improving Indian meteorological department method for 24- hourly rainfall downscaling to shorter durations for IDF modelling

2021 ◽  
Vol 5 (2) ◽  
pp. 72-82
Author(s):  
Ify L Nwaogazie ◽  
Masi G Sam ◽  
Chiedozie Ikebude
Keyword(s):  
Goodness Of Fit ◽  
Predictive Performance ◽  
Rainfall Amount ◽  
Return Periods ◽  
Hourly Rainfall ◽  
Significant Difference ◽  
The Difference ◽  
Improved Performance ◽  
Intensity Duration Frequency ◽  
Storm Drain

The development of Intensity-Duration-Frequency (IDF) models for storm drain design and related flood mitigation structures requires rainfall amount and corresponding duration records. To achieve this purpose, three short duration downscaling methods from 24-hourly rainfall amount data were selected for improvement, namely: IMD, AIMD and MCIMD, with the CAMS method used as the experiment control. Three types of general PDF-IDF models (GEVT-1, LPT-3 and ND) were developed based on the downscaling methods yielding goodness of fit (R2) with very high correlation of 0.995–0.999 and model accuracy with mean square error (MSE) of 4.123–7.85. The PDF-IDF models predicted intensities plotted against durations for different return periods of 2, 5, 10, 25, 50 and 100 years, showed visual differences in the predictive performance of the intensities derived from the downscaling methods. Kruskal-Wallis non-parametric test of significance at 5% level carried out showed that no-significant difference exist for 15-60 minutes duration, while the difference was significant for durations between 90–300 minutes. The LPT-3 based on MCIMD yielded higher improved performance in prediction of intensities relative to the IMD. The level of improvement ranges from 35.17 to 52.26% and 25.0 to 39.89%; while that of AIMD ranges from 10.97 to 20.87% and 3.33 to 12.53% for 10 and 100 year return periods, respectively. The use of the IMD downscaling method with the LPT-3 PDF-IDF model for design purposes will be justified if modified with some percentage improvement or adjustment factor.

Applying the Anderson-Darling Test to Suicide Clusters

Crisis ◽  
2013 ◽  
Vol 34 (6) ◽  
pp. 434-437 ◽  
Author(s):  
Donald W. MacKenzie
Keyword(s):  
Poisson Process ◽  
Goodness Of Fit ◽  
Small Samples ◽  
Massachusetts Institute Of Technology ◽  
Homogeneous Poisson Process ◽  
Cornell University ◽  
The Difference ◽  
Suicide Clusters ◽  
Institute Of Technology ◽  
Anderson Darling

Background: Suicide clusters at Cornell University and the Massachusetts Institute of Technology (MIT) prompted popular and expert speculation of suicide contagion. However, some clustering is to be expected in any random process. Aim: This work tested whether suicide clusters at these two universities differed significantly from those expected under a homogeneous Poisson process, in which suicides occur randomly and independently of one another. Method: Suicide dates were collected for MIT and Cornell for 1990–2012. The Anderson-Darling statistic was used to test the goodness-of-fit of the intervals between suicides to distribution expected under the Poisson process. Results: Suicides at MIT were consistent with the homogeneous Poisson process, while those at Cornell showed clustering inconsistent with such a process (p = .05). Conclusions: The Anderson-Darling test provides a statistically powerful means to identify suicide clustering in small samples. Practitioners can use this method to test for clustering in relevant communities. The difference in clustering behavior between the two institutions suggests that more institutions should be studied to determine the prevalence of suicide clustering in universities and its causes.

Cranial crassicaudiasis in two coastal dolphin species from South Africa is predominantly a disease of immature individuals

2020 ◽  
Vol 139 ◽  
pp. 93-102 ◽  
Author(s):  
MF Van Bressem ◽  
P Duignan ◽  
JA Raga ◽  
K Van Waerebeek ◽  
N Fraijia-Fernández ◽  
...  
Keyword(s):  
South Africa ◽  
Bone Development ◽  
Bottlenose Dolphins ◽  
Fatal Outcome ◽  
Population Level ◽  
Cape Coast ◽  
Osteolytic Lesions ◽  
Immune Mediated ◽  
Significant Difference ◽  
The Difference

Crassicauda spp. (Nematoda) infest the cranial sinuses of several odontocetes, causing diagnostic trabecular osteolytic lesions. We examined skulls of 77 Indian Ocean humpback dolphins Sousa plumbea and 69 Indo-Pacific bottlenose dolphins Tursiops aduncus, caught in bather-protecting nets off KwaZulu-Natal (KZN) from 1970-2017, and skulls of 6 S. plumbea stranded along the southern Cape coast in South Africa from 1963-2002. Prevalence of cranial crassicaudiasis was evaluated according to sex and cranial maturity. Overall, prevalence in S. plumbea and T. aduncus taken off KZN was 13 and 31.9%, respectively. Parasitosis variably affected 1 or more cranial bones (frontal, pterygoid, maxillary and sphenoid). No significant difference was found by gender for either species, allowing sexes to be pooled. However, there was a significant difference in lesion prevalence by age, with immature T. aduncus 4.6 times more likely affected than adults, while for S. plumbea, the difference was 6.5-fold. As severe osteolytic lesions are unlikely to heal without trace, we propose that infection is more likely to have a fatal outcome for immature dolphins, possibly because of incomplete bone development, lower immune competence in clearing parasites or an over-exuberant inflammatory response in concert with parasitic enzymatic erosion. Cranial osteolysis was not observed in mature males (18 S. plumbea, 21 T. aduncus), suggesting potential cohort-linked immune-mediated resistance to infestation. Crassicauda spp. may play a role in the natural mortality of S. plumbea and T. aduncus, but the pathogenesis and population level impact remain unknown.

LABORATORY TESTS OF THYROID FUNCTION IN HYPERTHYROIDISM II.

1969 ◽  
Vol 62 (4_Suppla) ◽  
pp. S23-S35
Author(s):  
B.-A. Lamberg ◽  
O. P. Heinonen ◽  
K. Liewendahl ◽  
G. Kvist ◽  
M. Viherkoski ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Laboratory Tests ◽  
Goodness Of Fit ◽  
Point Of View ◽  
Accurate Estimation ◽  
Diagnostic Efficiency ◽  
Normal Limits ◽  
Significant Difference ◽  
Crossing Point ◽  
Hyperthyroid Patients

ABSTRACT The distributions of 13 variables based on 10 laboratory tests measuring thyroid function were studied in euthyroid controls and in patients with toxic diffuse or toxic multinodular goitre. Density functions were fitted to the empirical data and the goodness of fit was evaluated by the use of the χ2-test. In a few instances there was a significant difference but the material available was in some respects too small to allow a very accurate estimation. The normal limits for each variable was defined by the 2.5 and 97.5 percentiles. It appears that in some instances these limits are too rigorous from the practical point of view. It is emphasized that the crossing point of the functions for euthyroid controls and hyperthyroid patients may be a better limit to use. In a preliminary analysis of the diagnostic efficiency the variables of total or free hormone concentration in the blood proved clearily superior to all other variables.

Fecundity and Gonado-somatic Index of Trichiurus lepturus (Linnaeus, 1758) Along the Zamboanga del Norte Coast

2018 ◽  
Vol 6 (7) ◽  
pp. 120
Author(s):  
Ma. Dulce C. Guillena
Keyword(s):  
Sex Ratio ◽  
Stock Assessment ◽  
Chi Square ◽  
Moon Phases ◽  
Ovary Weight ◽  
Moment Coefficient ◽  
Trichiurus Lepturus ◽  
Significant Difference ◽  
The Relationship ◽  
Somatic Index

Gonado-somatic index and fecundity are tools for measuring the sexual maturity and ability of animals to reproduce.  This study investigates the reproduction of Trichiurus lepturus. Specifically, this aimed to determine the sex ratio, the GSI, the relationship between fecundity and total length, fecundity and total weight, fecundity and ovary weight. The Descriptive Method of research was used.  Percentage and chi-square was utilized in determining the percentage of occurrence and sex ratio respectively.   Pearson r Product Moment Coefficient of Correlation was used to determine the relationships of the parameters. The study revealed that females outnumbered males and the sex ratio for different month showed significant difference.  Spawning season was observed to occur in November and December as revealed in its GSI values and it synchronized with the full and new moon phases.  Fecundity is positively correlated with body weight, body size, and ovary weight where ovary weight is observed to be the best index for fecundity.  The results of this study could be used further for formal stock assessment of cutlassfish fishery.

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