scholarly journals Evaluation of the Reliability of Lifting Cranesmetal Structures

2021 ◽  
pp. 71-77
Author(s):  
Svitlana Yu. Kruzhnova ◽  
◽  
Anna D. Fursina ◽  
◽  
Keyword(s):  
Coefficient Of Variation ◽  
Metal Structure ◽  
Remaining Life ◽  
Accident Rate ◽  
The Third ◽  
Loss Of Strength ◽  
Life Circle

The need to search for additional methods to reduce the accident rate and to improve the safety of the crane fleet is due to the statistics of injuries and accidents at lifting structures, which rank the third after injuries and accidents in the coal and mining industries. A method for assessing the remaining life-circle, which facilitates predicting the loss of strength of a metal structure as a result of fatigue and corrosion damages considered. After analyzing the results of calculating the structure persistence, a decision is made on its further operation. If the results of calculating Q (t),with the consideration of the change in σ-1D in terms of the coefficient of variation, exceed the value of the 25 years durability, then it is inappropriate to calculate its persistence.

A new method to evaluate interlacing yarns

2019 ◽  
Vol 90 (7-8) ◽  
pp. 838-846
Author(s):  
Meng Wang ◽  
Yinlan Zhan ◽  
Leon Yao
Keyword(s):  
Coefficient Of Variation ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Complete Evaluation ◽  
Popular Method ◽  
Modeling Methods ◽  
The Third ◽  
Comparison And Analysis ◽  
Test Algorithm

The theory of purification is proposed in this article. Based on the framework of this theory, several models can be built to give a synthetic quality evaluation of interlacing yarns. In this paper, three models are given. The first one is the most popular method to evaluate the quality of interlacing yarn and we can prove it meets the theory of purification. The second one is modified according to the coefficient of variation. The third one is a new evaluation method. Meanwhile, we give a test algorithm to compare the degree of reflecting common cognition of the three models. From the result of comparison and analysis, the new evaluation method is recommended. It has a comparatively complete evaluation value for every state in universe M. Compared to other modeling methods, this method can give every level of interlacing yarn a relatively pertinent evaluation.

scholarly journals A method for measuring total aerosol oxidative potential (OP) with the dithiothreitol (DTT) assay and comparisons between an urban and roadside site of water-soluble and total OP

2017 ◽  
Author(s):  
Dong Gao ◽  
Ting Fang ◽  
Vishal Verma ◽  
Linghan Zeng ◽  
Rodney Weber
Keyword(s):  
Organic Solvents ◽  
Coefficient Of Variation ◽  
Extraction Method ◽  
Pure Water ◽  
Water Soluble ◽  
Aerodynamic Diameter ◽  
Oxidative Potential ◽  
The Third ◽  
Analytical System ◽  
Solid Aerosol

Abstract. An automated analytical system was developed for measuring the oxidative potential (OP) with the dithiothreitol (DTT) assay of filter extracts that include both water-soluble and water-insoluble (solid) aerosol species. Three approaches for measuring total oxidative potential were compared. These include using methanol as the solvent with (1) and without (2) filtering the extract, followed by removing the solvent and reconstituting with water, and (3) extraction in pure water and performing the OP analysis in the extraction vial with the filter. The water extraction method (the third approach, with filter remaining in the vial) generally yielded highest DTT responses with better precision (coefficient of variation of 1–5 %), and was correlated with a greater number of other aerosol components. Because no organic solvents were used, which must be mostly eliminated prior to DTT analysis, it was the easiest to automate by modifying an automated analytical system for measuring water-soluble OP developed by Fang et al. (2015). Daily 23h filter samples were collected simultaneously at a roadside (RS) and a representative urban (GT) site for two one-month study periods, and both water-soluble (OPWS-DTT) and total (OPTotal-DTT) OP were measured. Using PM2.5 (aerodynamic diameter

scholarly journals Coefficient of Variation Can Identify the Most Important Effects of Experimental Treatments

2015 ◽  
Vol 43 (1) ◽  
pp. 287-291 ◽  
Author(s):  
José Carlos LORENZO ◽  
Lourdes YABOR ◽  
Norma MEDINA ◽  
Nicolás QUINTANA ◽  
Vanessa WELLS
Keyword(s):  
High Temperature ◽  
Common Bean ◽  
Liquid Nitrogen ◽  
Coefficient Of Variation ◽  
Electrolyte Leakage ◽  
Short Report ◽  
The Third ◽  
Multiple Variables ◽  
Experimental Treatments

Most agricultural experiments involve evaluation of multiple variables and at times it can be difficult to identify the biologically relevant effects of the experimental treatments after performing the traditional ANOVA, Tukey and t-tests. The coefficient of variation formula could be an important tool to focus ‘Result and Discussion’ sections only on the most important changes produced by the experimental treatments. This short report is intended to exemplify the use of the coefficient of variation in three plant physiology experiments. The first one dealt with the effects of common bean plantlet exposure to high temperature under controlled conditions (levels: 28 and 40 °C). The second experiment was related to common bean seed exposure to liquid nitrogen during five different periods of time (levels: 0, 7, 14, 21 and 28 days). The third experiment was bi-factorial: factor 1 was the ‘type of plant material’ (levels: pineapple plants genetically transformed and the untransformed control); and factor 2 was the ‘time of in vitro-plantlet hardening’ (levels: 0, 15 and 30 days). Contents of phenolics, aldehydes, chlorophylls and proteins were determined. Percentage of seed germination, electrolyte leakage, peroxidase activity, plant height and weight were also measured. Experiments were monofactorial with two levels, monofactorial with five levels and bifactorial, respectively, with randomized design. The coefficient of variation showed that the most remarkable effects of high temperature were recorded in free phenolics and chlorophylls (a, b, total). Electrolyte leakage and chlorophyll b concentration were the most modified indicators as a result of seed exposure to liquid nitrogen. In the third experiment, modification in the levels of malondialdehyde and other aldehydes were the most relevant changes resulting from factors interactions. A similar procedure has not been published, except for our previous publications, not focused on the use of the coefficient of variation, just on the biological results.

Chemical Determination of Niacinamide in Multivitamin Preparations

1968 ◽  
Vol 51 (4) ◽  
pp. 828-834
Author(s):  
Omer Pelletier
Keyword(s):  
Coefficient Of Variation ◽  
Microbiological Method ◽  
Chemical Methods ◽  
Mean Values ◽  
The Third ◽  
Collaborative Studies ◽  
Chemical Determination ◽  
Aoac Method ◽  
The Mean

Abstract The AOAC method and the Pelletier and Campbell method for the assay of niacinamide in multivitamin preparations were compared in two collaborative studies. In the first study, three multivitamin sirup preparations were analyzed by six laboratories; the proposed method gave higher results for two preparations but lower results for the third. In the second study, four types of multivitamin preparations were analyzed; twelve laboratories reported on the chemical methods and three laboratories on the microbiological method. There was no difference in the mean values for two types of samples, but one sample of multivitamin tablets yielded mean values about 5% lower by the proposed method, suggesting the presence of a trace of niacin; with a multivitamin and mineral sirup the proposed method gave values about 6% higher than the AOAC method and 3% lower than the microbiological assay. The coefficient of variation for any sample in any laboratory by the AOAC method was about 14% in the first study and 1 1% in the second study; by the proposed method it was 4 and 9% in the same respective studies. It is recommended that the present AOAC method be modified by adjusting the pH of sample hydrolysates in the range of 2.5—4.5 instead of 7—9 to reduce the absorhance of the blanks, and that the method of Pelletier and Campbell be adopted as official, first action.

Ayurvedic Management of Acute Cerebrovascular Accident – A Case Study

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Totad Muttappa ◽  
Vasantha B ◽  
Advait Vaze ◽  
Rakesh PM
Keyword(s):  
Cold Water ◽  
The Body ◽  
Medical Field ◽  
The Third ◽  
Remarkable Improvement ◽  
Acute Cerebrovascular Accident ◽  
The Right ◽  
Treatment Procedures ◽  
Loss Of Strength

Cerebro vascular accident (CVA) is the third leading cause of death in developing countries. This disease has posed a great problem to the medical field as far as its treatment is concerned. Ayurveda can offer a lot in such conditions. This is a case study of an acute CVA. An acute CVA case was admitted on 23/05/2016 at 7.30 pm, with the complaints of loss of strength in the right side of the body, loss of speech, drowsiness since 2 days. On examination Glasgowcoma scale was 8/15 (E - 2, M- 1, V-2). Investigation i.e., Computed Tomography (CT) scan of head showed on 24/05/2016: Lacunar infarcts in the Right Frontal White matter and in the Pons at the Midline. It was diagnosed as Pitta Kapha Avruta Vataja Pakshaghata (Vaama). In this case various treatment procedures like cold water pouring over forehead, application of medicated paste on anterior frontanallae, application of Shathadhouta Ghrutha all over the body, nasal instillation etc. with oral medicines were adopted at various condition of the disease. There was a remarkable improvement in the subjective and objective clinical features.

scholarly journals World and European Rowing Medallists Pace With Smaller Variation Than Their Competitors

2021 ◽  
Vol 3 ◽  
Author(s):  
Fredrik Mentzoni ◽  
Thomas Losnegard
Keyword(s):  
Coefficient Of Variation ◽  
Statistical Tests ◽  
Effect Sizes ◽  
Performance Levels ◽  
The Third ◽  
Pacing Strategy ◽  
Fourth Segment ◽  
World Class ◽  
And Performance ◽  
Relative Differences

Purpose: To establish the relation between pacing pattern and performance, within sex, and number of crew members, at the very highest performance level in World class rowing.Methods: Pacing profiles based on official 500 m split times in 106 A-finals with six contesting boat crews (n = 636 crews), in recent World (2017–2019) and European (2017–2021) championships, were analyzed. The coefficient of variation (CV) and sum of relative differences (SRD) of the split times, and normalized velocities in the four segments of the race, were compared between performance levels, that is, placement (1st–6th), and subgroups based on sex (female or male) and number of crew members (one, two, or four). Statistical tests and resulting p-values and effect sizes (Cohen's d) were used to assess differences between groups.Results: The pacing profiles of the medallists had smaller variation than those of the non-podium finishers (CV = 1.72% vs. CV = 2.00%; p = 4 × 10−7, d = 0.41). Compared to the non-podium finishers, the medallists had lower normalized velocities in the first and second segments of the race, slightly higher in the third segment and higher in the fourth segment. Female crews paced somewhat more evenly than male crews. No significant differences were found in the evenness of pacing profiles between singles, doubles/pairs and quads/fours. Analyses of SRD were overall consistent with analyses of CV.Conclusion: Medal winners in major rowing championships use a more even pacing strategy than their final competitors, which could imply that such a strategy is advantageous in rowing.

scholarly journals Statistical comparison of coverage data of disturbed habitats in the Hajdúság

2009 ◽  
pp. 171-178
Author(s):  
Szilvia Szőke ◽  
Péter Tanyi
Keyword(s):  
Coefficient Of Variation ◽  
Point Of View ◽  
Statistical Analyses ◽  
Cluster Analyses ◽  
The Third ◽  
Plant Associations ◽  
Statistical Dispersion ◽  
Plant Families ◽  
Disturbed Habitats ◽  
The Given

Between 2002 and 2006 we made the coenological survey of five disturbed habitats marked as grasslands. With our coenological examinations and the statistical analyses we wanted to make the detailed botanical survey of the given five habitats in order to verify that the maintenance of habitats amongst agricultural lands – and considered as less valuable – is of high importance and necessary from an environmental point of view, since these habitats are often living and feeding areas of many rare and/or protected plant- and animal species.As a result of the statistical analyses we have pointed out that number of species in case of all the five habitats extreme fluctuation characterizes the statistical universe. As regards theaverage of the coverage it is the highest in case of the third habitat (degraded Puccinellia grassland), and the coefficient of variation shows homogenity as well. In examining the Shannon-value the average is the highest in case of the second habitat (Alopecurus meadow), and the statistical dispersion is the smallest. The coefficient of variation shows medium variability. The median of evenness is the lower in case of the third habitat (degradedPuccinellia meadow) and the statistical is the highest here as well. We have done the Hierarchical and the K-Means Cluster Analyses for the 21 plant associations of the five habitats. Both cluster analyses put the same associations into the same cluster, soone can state that the associations in each cluster are different from the associations of the other ones according to the coverage data of the plant families. 

On the Three-Moment Approximation of a General Distribution by a Coxian Distribution

1988 ◽  
Vol 2 (2) ◽  
pp. 257-261 ◽  
Author(s):  
M. C. Van Der Heijden
Keyword(s):  
Coefficient Of Variation ◽  
Random Variable ◽  
Upper Bounds ◽  
General Distribution ◽  
Positive Random Variable ◽  
Lower And Upper Bounds ◽  
The Third ◽  
Coxian Distribution ◽  
Moment Approximation ◽  
Third Moment

The Coxian-2 distribution is a very useful distribution for queuing and reliability analysis. It is important to know when a general probability distribution can be approximated by a Coxian-2 distribution by fitting the first three moments. For a positive random variable with a squared coefficient of variation larger than 1, a lower bound on its third moment is known for which a three-moment fit exists. To complete the figure, in this note lower and upper bounds on the third moment are derived when the squared coefficient of variation is between 0.5 and 1. Also, we characterize the C2-distributions that correspond to these bounds.

scholarly journals Liquidity Analysis of UAE Banks

2020 ◽  
pp. 82-86
Author(s):  
Mukdad Ibrahim
Keyword(s):  
Financial Crisis ◽  
Capital Structure ◽  
Coefficient Of Variation ◽  
Cash Flows ◽  
Bank Performance ◽  
The Third ◽  
The Capital Structure

The aim of this paper is to analyze the liquidity levels of various banks in the UAE for the period 2005-2009. To understand the behavior of liquidity indicators especially during the financial crisis, the researcher will analyze the four liquidity indicators over the years 2005 to 2009. The findings highlight how the banks in question have been impacted by the 2007-2008 crisis. This can most obviously be seen in the notable decline of each of the banks liquidity level in 2009. The effect of loans to total assets, loans to customers’ deposit, and investment to total assets ratios for the five banks was most notable in 2009. Two liquidity ratios were analyzed in order to determine the banks’ ability to honor its debt obligations, these being loans to total assets and loans to customers respectively. The third ratio was the total equity to total assets to assess the liquidity level in the capital structure, while the fourth ratio was the investment to total assets to measure the managing of liquidity. While Bank liquidity was affected by the crisis, bank performance remained relatively stable, as measured by coefficient of variation, since these banks were able to yield more control over cash flows in comparison to revenues and costs.

scholarly journals Perbandingan Risk Dan Return Investasi Pada Emas, Saham Dan Reksadana Dalam Menentukan Keputusan Investasi

2010 ◽  
Vol 1 (2) ◽  
pp. 105
Author(s):  
Wirawan ED Radianto ◽  
Citra Ayuningtyas
Keyword(s):  
Mutual Funds ◽  
Mutual Fund ◽  
Coefficient Of Variation ◽  
Investment Decisions ◽  
Risk And Return ◽  
The Third ◽  
Significant Difference ◽  
Comparative Risk ◽  
The Right ◽  
One Way Anova

AbstractThe purpose of this study is to investigate whether there are differences in risk and return of investment in investment instruments that investigated the third is gold, LQ 45 index and Mutual Funds. Comparative risk and return is to know where the most profitable instruments so that the right to choose in making investment decisions. The sample used is the price of gold, LQ 45 index and NAV shares of mutual funds during the period from 1997 until 2009. One Way ANOVA is used in this study. The results of this study as follows. There is a significant difference of  risk and return among gold, mutual fund, and LQ 45 index. Finally it can be concluded that gold is the most profitable investment instruments, it is because the smaller the coefficient of variation, the more profitable an investment.

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