scholarly journals Monitoring the impact of tyre inflation pressure on tensile properties of forest tractors

2014 ◽  
Vol 60 (No. 4) ◽  
pp. 127-133
Author(s):  
M. Helexa
Keyword(s):  
Factor Analysis ◽  
Statistical Analysis ◽  
Tensile Properties ◽  
Statistical Methods ◽  
Analysis Of Variance ◽  
Slovak Republic ◽  
Tensile Tests ◽  
Concrete Surface ◽  
Inflation Pressure ◽  
The Impact

The article discusses monitoring of the impact of tyre inflation pressure on tensile properties of forest tractors. The <br />LKT 81 T forest tractor, manufactured byZŤS TEES, Martin (Slovak Republic) and widely used in Slovakia, was specifically chosen as the mechanised vehicle to be monitored. Tensile properties were examined using standard tensile tests, with a Tatra freight vehicle serving as the load vehicle. Actual measurements were performed on a concrete surface and on soil characterised as gravelly loam whose average moisture was 38%. The statistical methods used to verify the impact of significance from changes in tyre inflation pressure on selected tensile indicators were multi-factor analysis of variance (ANOVA) and Student&rsquo;s t-test. Even though statistical analysis failed to directly confirm significance in the impact of changes of tyre inflation pressure on selected load indicators for a forest tractor fitted with standard tyres, positive changes can be discerned in measured dependencies. The article concludes with a discussion of the results obtained and their possible application in operational practice.

IMPACT TENSILE PROPERTIES OF YAG LASER WELDED BUTT JOINTS MADE BY DIFFERENT STEEL SHEETS FOR VEHICLES

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1712-1717
Author(s):  
Y. TAKAHASHI ◽  
M. DAIMARUYA ◽  
H. KOBAYASHI ◽  
H. TSUDA ◽  
H. FUJIKI
Keyword(s):  
Tensile Properties ◽  
Welded Joints ◽  
Testing Machine ◽  
High Strength ◽  
Tensile Tests ◽  
Butt Joints ◽  
Yag Laser ◽  
Steel Sheets ◽  
Static Tensile ◽  
The Impact

The tensile properties of YAG laser welded butt joints using different high strength steel sheets with a tensile strength of 270 MPa, 590 MPa and 980 MPa (denoted HR270, HR590 and HR980, respectively) were investigated at static and dynamic rates, together with the three kinds of laser welded joints made by the same steel sheets. The impact tensile tests were performed by using the vertical type of split Hopkinson tension bar apparatus, while the static tensile tests were carried out using a universal testing machine INSTRON5586. The impact tensile strengths were significantly increased in comparison with the static ones due to the effect of strain rate, which might be the contribution of the part of HR270 base metal. And in both of static and impact tests, the fracture strains of HR270-HR590 joint, HR270-HR980 joint and HR590-HR980 joint were about one half of the fracture strains observed in the same steel welded joints of HR270-HR270, HR270-HR270 and HR590-HR590, respectively.

Counting Guns

2002 ◽  
Vol 26 (4) ◽  
pp. 699-708
Author(s):  
Gordon Wood ◽  
Robert Churchill ◽  
Edward Cook ◽  
James Lindgren ◽  
Wilbur Miller ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Social Science ◽  
Statistical Methods ◽  
Violent Crime ◽  
The United States ◽  
Real Income ◽  
Crime Rates ◽  
Gun Control ◽  
Gun Laws ◽  
The Impact

At the fall 2001 Social Science History Association convention in Chicago, the Crime and Justice network sponsored a forum on the history of gun ownership, gun use, and gun violence in the United States. Our purpose was to consider how social science historians might contribute nowand in the future to the public debate over gun control and gun rights. To date, we have had little impact on that debate. It has been dominated by mainstream social scientists and historians, especially scholars such as Gary Kleck, John Lott, and Michael Bellesiles, whose work, despite profound flaws, is politically congenial to either opponents or proponents of gun control. Kleck and Mark Gertz (1995), for instance, argue on the basis of their widely cited survey that gun owners prevent numerous crimes each year in theUnited States by using firearms to defend themselves and their property. If their survey respondents are to be believed, American gun owners shot 100,000 criminals in 1994 in selfdefense–a preposterous number (Cook and Ludwig 1996: 57–58; Cook and Moore 1999: 280–81). Lott (2000) claims on the basis of his statistical analysis of recent crime rates that laws allowing private individuals to carry concealed firearms deter murders, rapes, and robberies, because criminals are afraid to attack potentially armed victims. However, he biases his results by confining his analysis to the years between 1977 and 1992, when violent crime rates had peaked and varied little from year to year (ibid.: 44–45). He reports only regression models that support his thesis and neglects to mention that each of those models finds a positive relationship between violent crime and real income, and an inverse relationship between violent crime and unemployment (ibid.: 52–53)–implausible relationships that suggest the presence of multicollinearity, measurement error, or misspecification. Lott then misrepresents his results by claiming falsely that statistical methods can distinguish in a quasi-experimental way the impact of gun laws from the impact of other social, economic, and cultural forces (ibid.: 26, 34–35; Guterl 1996). Had Lott extended his study to the 1930s, the correlation between gun laws and declining homicide rates that dominates his statistical analysis would have disappeared. An unbiased study would include some consideration of alternative explanations and an acknowledgment of the explanatory limits of statistical methods.

scholarly journals 999 STATISTICAL ANALYSIS OF DISEASE REACTION DATA USING NONPARAMETRIC METHODS

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 572e-572 ◽  
Author(s):  
Kent M. Eskridge
Keyword(s):  
Statistical Analysis ◽  
Statistical Methods ◽  
Analysis Of Variance ◽  
Plant Disease ◽  
Nonparametric Methods ◽  
Classical Analysis ◽  
Disease Reaction ◽  
Reaction Data ◽  
Nonparametric Statistical Methods ◽  
Nonparametric Statistical

Breeders need powerful and simply understood statistical methods when analyzing disease reaction data. However, many disease reaction experiments result in data which do not adhere to the classical analysis of variance (ANOVA) assumptions of normality, homogeneity variance and a correctly specified model. Nonparametric statistical methods which require fewer assumptions than classical ANOVA, are applied to data from several disease reaction experiments. It is concluded that nonparametric methods are easily understood, can be productively applied to plant disease experiments and many times result in improved chances for detecting differences between treatments.

scholarly journals Contribution to cultural-geographical research: Possible evaluations of cultural aspects by statistical methods

Geografie ◽  
2005 ◽  
Vol 110 (4) ◽  
pp. 300-314
Author(s):  
Silvie Kuldová
Keyword(s):  
Statistical Analysis ◽  
Statistical Methods ◽  
Regional Identity ◽  
Chi Square ◽  
Geographical Research ◽  
Hard Data ◽  
Cultural Aspects ◽  
The Impact ◽  
One Way Anova ◽  
Statistical Analysis Methods

The aim of this article is to show that an evaluation of cultural aspects does not always mean an operation with "soft", non-quantifiable data. It is possible to refer to cultural variety of regions also with the help of numeric indicators, so-called "hard" data. As an example, differences between the Czech borderland and inland are studied in this article. The used characteristics are the percentage of native persons and number of municipality parts per municipality. Dissimilarity ratio of these indicators in space is evaluated by statistical analysis methods: independent-samples T test, one-way ANOVA, chi-square tests. Component analysis outputs help to complete the findings. Statistically significant differences between the identity of the Czech borderland and inland were proved. The impact of the former Czech-German linguistic boundary on the degree of regional identity of the inhabitants is still sensible.

The Impact of Student-Teacher Pairings on Teacher Effectiveness

1975 ◽  
Vol 12 (2) ◽  
pp. 169-189 ◽  
Author(s):  
William G. Cunningham
Keyword(s):  
Factor Analysis ◽  
Teacher Effectiveness ◽  
Analysis Of Variance ◽  
Student Teacher ◽  
Kindergarten Children ◽  
Different Types ◽  
The Impact

This study tests the hypothesis that types of students tend to differ in the benefit that they receive from various types of teachers. Factor analysis was used to identify four types of students (kindergarten children) and four types of teachers. The findings from the analysis of variance procedure were that a certain type of teacher was significantly more effective with one type of student than with another. The knowledge that different types of teachers tend to differ in the success they have with the same type of student, and that different types of students tend to differ in the benefit they receive from the same type of teacher might provide a basis for the matching of students with teachers.

scholarly journals Researching the local community's satisfaction with the manifestation, International Carnival of Vrnjci

2021 ◽  
Vol 7 (1) ◽  
pp. 101-130
Author(s):  
Nataša Đorđević ◽  
Milena Podovac ◽  
Snežana Milićević
Keyword(s):  
Factor Analysis ◽  
Statistical Analysis ◽  
Analysis Of Variance ◽  
Local Population ◽  
Demographic Characteristics ◽  
Survey Method ◽  
Professional Status ◽  
Level Of Satisfaction ◽  
Significant Difference ◽  
Descriptive Statistical Analysis

The International Carnival of Vrnjci is a manifestation that has been organized for 15 years in Vrnjačka Banja. As a manifestation that gathers a large number of tourists and visitors, besides its positive impacts, attention should be paid to the level of satisfaction of the local population in Vrnjačka Banja with this manifestation, which is the aim of this paper. In addition, the paper examines the existence of a statistically significant difference in the level of local population's satisfaction with this manifestation depending on their different socio-demographic characteristics. A survey method was applied to a sample of 300 respondents. Descriptive statistical analysis, independent sample t-test and one-factor analysis of variance (ANOVA) were used to process the collected responses. The results of the research showed that there is a statistically significant difference in the level of satisfaction with the Carnival of Vrnjci between respondents of different gender, as well as that the level of satisfaction of the respondents influenced by professional status, length of residence in Vrnjacka Banja and the connection between the respondent's job and tourism.

scholarly journals Budgetary Participation and Managerial Performance in Public Sector Organisations: A Study from Nigeria

10.26458/1812 ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 47-76 ◽  
Author(s):  
Babajide OYEWO ◽  
Gbadegesin ADEYEYE
Keyword(s):  
Factor Analysis ◽  
Statistical Analysis ◽  
Public Sector ◽  
Managerial Performance ◽  
Budgetary Participation ◽  
High Level ◽  
The Impact

This study investigated the impact of budgetary participation on managerial performance in public-sector organisations in Nigeria. Questionnaire was used to obtain the opinion of 174 managers (unit and departmental heads) in five public-sector organisations located in Abuja, Nigeria Federal Capital. Results from statistical analysis (descriptive, factor analysis, Kruskal-Wallis tests, correlation and regression) show that there is high level of budgetary participation by managers in public-sector organisations in Nigeria.  Although budgetary participation was observed to positively and significantly impact on managerial functions such as planning, investigating, co-ordinating, supervising, evaluating, and staffing, it exerts the most on planning. The impact of budgetary participation on managerial performance appears to be moderate. Whilst it is desirable for public-sector organisations to adopt sophisticated budgeting techniques, the study advocates for employees’ motivation and deeper involvement in budget matters as a way out of the traditional budgeting quagmire that public-sector organisations are characteristically bedevilled with.

scholarly journals Identifying risks facing the South African tourism industry

2012 ◽  
Vol 15 (2) ◽  
pp. 190-206 ◽  
Author(s):  
Gordon Shaw ◽  
Melville Saayman ◽  
Andrea Saayman
Keyword(s):  
Risk Assessment ◽  
Factor Analysis ◽  
Statistical Analysis ◽  
South African ◽  
Analysis Of Variance ◽  
Tourism Industry ◽  
The South ◽  
Anova Analysis ◽  
Travel And Tourism ◽  
Assessment Matrix

Even though risks certainly influence  travel and tourism patterns, very little research has been conducted  into how the industry generally perceives and manages risks.  This article aims to (i) identify the risks the South African tourism industry deems important; (ii) construct a matrix for assessing the various risks identified and (iii) determine whether sectors of the industry rate the importance of risks differently. In total, there were 212  responses to the questionnaire in the survey on South African tourism businesses.  The statistical analysis included a factor analysis and an ANOVA (analysis of variance). Nine factors were identified and the ANOVA confirmed that sectors do perceive differing levels of importance in the various risks. The risk assessment matrix showed that internal risks are rated among the most important, even though little attention is paid to these in the literature.

scholarly journals The impact of religious festival on roadside livestock traders in urban and peri-urban areas of Yogyakarta, Indonesia

2019 ◽  
Vol 12 (9) ◽  
pp. 1408-1415 ◽  
Author(s):  
Alek Ibrahim ◽  
I Gede Suparta Budisatria ◽  
Rini Widayanti ◽  
Wayan Tunas Artama
Keyword(s):  
Statistical Analysis ◽  
Analysis Of Variance ◽  
Urban Areas ◽  
Selling Price ◽  
High Profit ◽  
Significant Difference ◽  
Trading Activities ◽  
Religious Festival ◽  
The Impact ◽  
Depth Interviews

Background and Aim: Eid al-Adha is one of the most important festivals celebrated by Muslims in Indonesia. Roadside livestock traders open their stalls during the Eid al-Adha period. This study aimed to investigate the characteristics and behaviors of roadside livestock traders in urban and peri-urban areas in Yogyakarta, Indonesia. Materials and Methods: In-depth interviews with 36 roadside livestock traders were conducted on August 7-23, 2018 in urban (n=20) and peri-urban (n=16) areas of Yogyakarta. The collected data were analyzed by descriptive and statistical analysis using one-way analysis of variance. Results: The results indicate that the trading activities of roadside livestock traders in urban areas last longer (p<0.05) than in peri-urban areas. No difference was found in the opening day of stalls, the number of buyers, and trends in animal prices set by roadside livestock traders in urban and peri-urban areas. Most traders sell sheep and goats, buy livestock at the animal market, and only open their stalls during Eid al-Adha. Prices are high in this period, and buyers directly visit the stalls. A significant difference exists in the selling price of livestock between Eid al-Adha and ordinary days (non-festival), and most roadside traders benefit from the Eid al-Adha momentum. Conclusion: Significant similarities exist among roadside livestock traders during the Eid al-Adha period in urban and peri-urban areas of Yogyakarta, Indonesia. Sheep are more desirable than goats and cattle in this period, and Eid al-Adha generates a high profit for roadside livestock traders.

scholarly journals The Evaluation of Effect of 60-Days Sodium Benzoate Administration on Phase Composition of The Tibia’ Regenerate by Two-Way Anova

2018 ◽  
Vol 7 (4.36) ◽  
pp. 533
Author(s):  
Evgeniy N. Krikun ◽  
Vladyslav V. Luzin ◽  
Olga N. Fastova ◽  
Vitaliy N. Morozov ◽  
Elena N. Morozova
Keyword(s):  
Factor Analysis ◽  
Phase Composition ◽  
Analysis Of Variance ◽  
Internal Control ◽  
Sodium Benzoate ◽  
White Male ◽  
Male Rats ◽  
X Ray Diffraction ◽  
The Impact ◽  
Dose Dependent

Currently, sodium benzoate is widely used in the food industry, cosmetology and medicine. The literature provides information about the effect of its introduction on the growth and shaping of bones, the parameters of the crystal lattice of the regenerate formed therein. However, information about the effect of this food additive on the phase composition of the bone regenerate being formed and the degree of this influence is practically absent, which was the purpose of the study. The experiment was conducted on 210 white male rats, divided into 6 groups: 1st - control animals, 2nd and 3rd - rats, daily receiving intragastrically 1 ml of sodium benzoate 500 and 1000 mg/kg/day, respectively for 60 days. The 4th group - rats being inflicted a defect in both tibial bones, and the 5th and 6th - rats being inflicted a defect after the end of the 60-day injection of sodium benzoate. The timing of the experiment after the introduction of sodium benzoate was 3, 10, 15, 24 and 45 days. The area of the forming regenerate of tibial bones was investigated by X-ray diffraction analysis: the percentage content in the mineral of the regenerate of whitlockite, hydroxylapatite and calcite was calculated by the method of internal control. The impact of the introduction of sodium benzoate and the application of the defect on the above indicators was evaluated by two-factor analysis of variance. The results of the study showed that 60-day administration of sodium benzoate leads to an increase in the amorphism of the biomineral of the forming regenerate of tibial bones, the severity and recovery rate of which depends on its administered dose. Thus, the group being inflicted the defect of the tibial bones after the completion of the 60-day administration of sodium benzoate at a dose of 500 mg/kg/day had greater calcite content on day 10 to 45 by 17.88%, 12.88% and 6.63%, and whitlockite - on day 3, 24 and 45 by 14.30%, 4.52% and 6.20%, and hydroxylapatite - less on day 15 to 45 by 3.11%, 3.31% and 2.14%, compared with the defect-inflicted group without the introduction of sodium benzoate. An increase in the administered dose of sodium benzoate up to 1000 mg/kg/day led to aggravation of the identified deviations: the whitlockite content on day 3, 24, and 45 was higher by 16.15%, 6.21% and 9.54%, and the hydroxylapatite content on day 15 to 45 was lower by 3.98%, 4.16% and 3.34%. The conducted two-factor analysis of variance showed that the introduction of sodium benzoate had a significant effect on the change in the content of calcite, whitlockite and hydroxylapatite in the regenerate, the strength and duration of which depends on its administered dose. The maximum power of influence was registered for the increased content of calcite and the decreased content of hydroxylapatite in the mineral of the regenerate on day 45 of the experiment, and for the increased content of whitlockite - on day 3. When a defect was inflicted, the power of influence was maximal for the increased content of calcite and decreased content of hydroxylapatite on day 10, and the increased content of whitlockite - on day 15. In this case, a reverse dose-dependent effect was observed in all periods of the experiment.  

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