Statistical analysis of bamboo scrimber tensile mechanical property based on different models and experiments

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Songsong Sun ◽  
Maosong Wan
Keyword(s):  
Statistical Analysis ◽  
Natural Fiber ◽  
Weibull Model ◽  
Tensile Fracture ◽  
Distribution Models ◽  
Content Type ◽  
Axial Tensile ◽  
Bamboo Scrimber ◽  
Tensile Data ◽  
Object Of Study

PurposeBamboo scrimber is a new natural fiber-reinforced composite material in the modern industry. In this paper, the strength characteristics of this material were chosen as the object of study.Design/methodology/approachFirst, axial tensile fracture experiments were conducted on different test specimens to determine the corresponding strength data. Then three commonly used distribution models were applied to analyze the relationship between the strength and survival rate.FindingsThe results show that the tensile data demonstrate obvious dispersion. In addition, the three-parameter Weibull model fits the data best and may be used as the fundamental model for future analysis.Originality/valueSpecial statistical analysis research of the bamboo material experimental results has rarely been discovered. This paper provides a solid foundation for better understanding the mechanism of the bamboo scrimber strength phenomenon.

Evaluation of the applicability of different viscoelasticity constitutive models in bamboo scrimber short-term tensile creep property research

2021 ◽  
Vol 28 (1) ◽  
pp. 363-371
Author(s):  
Sun Songsong ◽  
Wan Maosong
Keyword(s):  
Constitutive Model ◽  
Natural Fiber ◽  
Creep Property ◽  
Constitutive Models ◽  
Maxwell Model ◽  
Tensile Creep ◽  
Tensile Fracture ◽  
Axial Tensile ◽  
Creep Characteristics ◽  
Bamboo Scrimber

Abstract Bamboo scrimber is a new natural fiber-reinforced composite material in modern industry. In this paper, the tensile creep characteristics of this material were chosen as the object of the study. First, axial tensile fracture experiments were conducted on different test specimens to determine the corresponding strength data. Then six sets of standard tensile creep experiments were conducted under different given stress levels. Finally, the Maxwell constitutive model was applied in fitting the relationship between strain and time. The results showed that the traditional Maxwell viscoelasticity constitutive model will result in some errors in the fitting results, while the combined fractional and Maxwell model can provide much higher accuracy in this study, thus it is more suitable for engineering applications. This paper provides a solid foundation for a better understanding of the mechanism of the bamboo scrimber creep behavior.

An exploratory empirical study of whistleblowing and whistleblowers

2020 ◽  
Vol 27 (3) ◽  
pp. 755-770
Author(s):  
Maria Krambia-Kapardis
Keyword(s):  
Statistical Analysis ◽  
Design Methodology ◽  
Research Topic ◽  
Due Date ◽  
Content Type ◽  
Unethical Behaviour ◽  
Eu Member States ◽  
European Directive ◽  
Original Survey ◽  
Practical Implications

Purpose The purpose of this study is to develop a profile of whistleblowers and to determine whether whistleblowing legislation would encourage those individuals to bring to light some illegal or unethical behaviour that otherwise would remain in the shadows. Design/methodology/approach Having identified whistleblowing correlation, a survey was carried out in Cyprus of actual whistleblowers and could-have-been whistleblowers. Findings Males between 46 and55 years of age, regardless of whether they have dependents or hold senior positions in organizations are significantly more likely to blow the whistle. However, could-have-been whistleblowers did not go ahead because they felt that the authorities would not act on their information. Research limitations/implications Because of the sensitive nature of the research topic and the fact that only whistleblowers or intended whistleblowers could participate in the study, the sample size is limited as a result. This, in turn, limits both the number of respondents in each category (actual and intended) as well as constrains the statistical analysis that could be carried out on the data. Practical implications It remains to be seen whether EU Member States shall implement the European Directive 2019/1937 on the protection of persons who report breaches of Union Law, in its entirety by the due date, namely December 2021. Originality/value This study provides a literature review of whistleblowing and reports an original survey against the backdrop of the European Directive.

Civil engineers’ personal values/demographics linkage in project team building

2017 ◽  
Vol 24 (6) ◽  
pp. 1337-1349 ◽  
Author(s):  
Atilla Damci ◽  
David Arditi ◽  
Gul Polat
Keyword(s):  
Statistical Analysis ◽  
Work Experience ◽  
Personal Values ◽  
Team Building ◽  
Project Teams ◽  
Team Leaders ◽  
Content Type ◽  
First Time ◽  
The Relationship ◽  
Civil Engineers

Purpose The purpose of this paper is to explore the relationship between civil engineers’ demographics (e.g. age, marital status, education, work experience) and their personal values. The objective was to predict civil engineers’ personal values based on their demographics. Design/methodology/approach A questionnaire survey was administered to civil engineers to collect data on their demographics and their personal values. Statistical analysis was performed to verify whether a significant statistical relationship exists between civil engineers’ demographics and their personal values. Findings The most important and the least important personal values were identified for civil engineers. Statistical analysis indicated that civil engineers’ values do vary based on their demographics. Research limitations/implications The results of this study cannot be generalized, because individuals’ personal values and demographics are, by definition, local. Location and culture may affect the personal values of civil engineers. Practical implications Team leaders normally have access to information about the demographics of the engineers they employ; based on the results of this study, they should be able to predict their personal values, and to make more informed decisions when appointing them to particular positions on project teams. Originality/value The research presented in this paper, establishes for the first time, that a linkage exists between civil engineers’ personal values and their demographics, and makes it easier for team leaders to make assignment decisions.

Characterization of the fracture behaviour of X42 microalloyed pipeline steel

2015 ◽  
Vol 6 (5) ◽  
pp. 567-577
Author(s):  
Halil Ibrahim Ünal ◽  
Hakan Atapek ◽  
Baran Gürkan Beleli ◽  
Seyda Polat ◽  
Serap Gümüs ◽  
...  
Keyword(s):  
Fracture Behaviour ◽  
Pipeline Steel ◽  
Sheet Material ◽  
Sheet Steel ◽  
Grain Morphology ◽  
Tensile Fracture ◽  
Pipe Material ◽  
Content Type ◽  
Fracture Surfaces ◽  
Impact Tests

Purpose – The purpose of this paper is to investigate the fracture of grade X42 microalloyed steel used as pipe material after tensile test at room temperature and impact tests at 0, −20 and −40°C, respectively. Design/methodology/approach – In the first stage of the study, X42 steels in the form of sheet and pipe materials were selected and etched samples were characterized using light microscope. In the second stage, mechanical properties of steels were obtained by microhardness measurements, static tensile and impact tests and all the broken surfaces were examined by scanning electron microscope to determine the fracture type as a function of both microstructure and loading. Findings – The examinations revealed that: first, the sheet material had a typical ferritic-pearlitic matrix, second, the transverse section of the sheet steel exhibited a matrix consisting of polygonal ferrite-aligned pearlite colonies and the longitudinal one had elongated ferrite phase and pearlite colonies in the direction of rolling, third, ferrite and pearlite distribution was different from the sheet material due to multiaxial deformation in the pipe material, fourth, tensile fracture surfaces of the steels had typical dimple fracture induced by microvoid coalescence, fifth, impact fracture surfaces of the steels changed as a function of the test temperature and cleavage fracture mode of ferritic-pearlitic matrix became more dominant as the temperature decreased, and sixth, grain morphology had an effect on the fracture behavior of the steels. Originality/value – The paper explains the fracture behaviour of X42 microalloyed pipeline steel and its fractographical analysis.

The impact of quality management practices on knowledge management processes: a study of a social security corporation in Jordan

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ata Al Shraah ◽  
Ayman Abu-Rumman ◽  
Faisal Al Madi ◽  
Fawwaz Ali Farhan Alhammad ◽  
Ayah Ahmad AlJboor
Keyword(s):  
Knowledge Management ◽  
Statistical Analysis ◽  
Quality Management ◽  
Social Security ◽  
Management Practices ◽  
Content Type ◽  
Quality Management Practices ◽  
Management Processes ◽  
The Impact ◽  
General Director

PurposeThis study aimed to investigate the impact of total quality practices on knowledge management (KM) processes across a Social Security Corporation (SSC) in Jordan and explore the best approach to improve KM processes using quality management.Design/methodology/approachThis study followed a quantitative methodology: a conceptual model was developed based on an extensive review of the related literature; an online survey was developed and distributed using the SSC's intranet; and 384 surveys were completed and used in the statistical analysis. The two-stage approach of structural equation modeling (SEM) was employed to analyze and interpret the data, and was used to validate the conceptual model of this research.FindingsBased on the statistical analysis it was found that six out of seven independent factors relating to quality management practices were confirmed to have a significant impact on the knowledge management processes (KMPs). Building upon the findings an agenda for improving KM processes using quality management is proposed.Originality/valueThis study was conducted in one organization namely the SSC because it is the largest public service organization in Jordan and offers compulsory services. The inclusion of other public organizations and companies may reflect different findings. Future research may collect data from other service industries to get a more comprehensive perspective from developing countries such as Jordan. Moreover, the population of this study included only the General Director, General Director Assistants, and Administrative Managers. Front-line employees were excluded from the data collection because the study was conducted solely from a managerial perspective.

Characterization of structure and air permeability of aromatherapic terry textile

2016 ◽  
Vol 28 (1) ◽  
pp. 2-17 ◽  
Author(s):  
Salvinija Petrulyte ◽  
Deimante Vankeviciute ◽  
Donatas Petrulis
Keyword(s):  
Statistical Analysis ◽  
Physical Properties ◽  
Design Methodology ◽  
Air Permeability ◽  
Factorial Designs ◽  
Linear Type ◽  
Content Type ◽  
Mathematical Equations ◽  
Binder Concentration

Purpose – The purpose of this paper is to investigate the physical properties of smart aromatherapic ramie/cotton terry fabrics containing microcapsules (MC) with essential Eucalyptus oil. Design/methodology/approach – Terry fabrics are manufactured by changing the weft density. The air permeability is determined for grey and microencapsulated textile. The factorial designs are made. For informative experiment the linear type of regression is analysed. Development of physical properties of microencapsulated terry fabrics is discussed. Findings – The air permeability of aromatherapic terry fabrics is determined. All statistical analysis is performed. Appropriate conclusions about the influence of fabric’s structure and microencapsulating process on terry fabric quality are made. Originality/value – To date there are no investigations concerning terry textiles with fragrance MC. This study developed analysis and empiric mathematical equations suitable for evaluating and designing terry fabrics with the air permeability required. Assessment of the influence of fabric’s weft density and binder concentration for the air permeability of terry textile is proposed.

Regression Analysis on Influences of Hem Parameters on Flare Sagging of Semi-Circular Skirt

2011 ◽  
Vol 331 ◽  
pp. 594-598
Author(s):  
Hong Ni
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Measured Data ◽  
Silk Fabric ◽  
Linear Regression Equation ◽  
Analysis Software ◽  
Wool Fabrics ◽  
Object Of Study ◽  
The Relationship ◽  
Statistical Analysis Software

Select 45 pieces of silk, cotton and wool fabrics in total, with semi-circular skirt modeling as object of study, investigate the relationship between flare sagging in straight & inclined grains of skirt pieces and fabric types, analyze the influence of hem parameters on flare sagging of semi-circular skirt and obtain multiple linear regression equation by disposing the measured data with SPSS statistical analysis software. The study result shows that the skirt hem of silk fabric is sagging more significantly than that of cotton and wool fabrics and there is a multi-linear relationship between semi-circular flare sagging and parameters.The research of this subject has both theoretical value and practical value.

scholarly journals Statistically, Does peer assisted learning make a difference on a UK engineering degree programme? HETL Scotland 2017

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anne Louise Nortcliffe ◽  
Sajhda Parveen ◽  
Cathy Pink-Keech
Keyword(s):  
Academic Performance ◽  
Statistical Analysis ◽  
Positive Impact ◽  
Data Sets ◽  
Social Categories ◽  
Peer Assisted Learning ◽  
Student Records ◽  
Content Type ◽  
Attainment Gap ◽  
The Impact

Purpose Black British minority ethnics (BME) students are nationally underachieving in comparison to their Ethnic Chinese and White peers, showing typically a 16 per cent graduate attainment gap in the UK. Previous research has suggested that the attainment gap could be explained by BME student disengagement, as the students typically commute from family home to University, and they work part time. However, peer-assisted learning (PAL) has been shown to have a positive impact on addressing and resolving student alienation and disengagement. However, a question still remains regarding whether student perceptions hold up to statistical analysis when scrutinised in comparison to similar cohorts without PAL interventions. The paper aims to discuss these issues. Design/methodology/approach This paper presents the results of a statistical study for two cohorts of students on engineering courses with a disproportionately high representation of BME students. The research method involved a statistical analysis of student records for the two cohorts to ascertain any effect of correlation between: PAL; student ethnicity; and student parental employment on student academic performance and placement attainment. Findings The results indicate that PAL has no significant impact on the academic performance; however, PAL has a positive impact on the placement/internship attainment for BME students and students from parental households with parents in non-managerial/professional employment. Research limitations/implications The research limitations are that the cohorts are small, but more equal diverse mix of different social categories than any other courses. However, as the cohorts are less than 30 students, comparing social categories the data sets are small to have absolute confidence in the statistical results of academic performance. Even the t-test has its limitations as the subjects are human, and there are multiple personal factors that can impact an individual academic performance; therefore, the data sets are heterostatic. Practical implications The results highlight that there is need for pedagogy interventions to support: ideally all BME students from all social categery to secure placements; BME students who are unable to go on placement to gain supplementary learning that has the same impact on their personal development and learning as placement/internship experience; and White students from managerial/professional family households to engage more in their studies. Social implications Not addressing and providing appropriate pedagogy interventions, in the wider context not addressing/resolving the BME academic and placement attainment gap, a set of students are being disadvantaged to their peers through no fault of their own, and compounding their academic attainment. As academics we have a duty to provide every opportunity to develop our student attainment, and as student entry is generally homogeneous, all students should attain it. Originality/value Previous research evaluation of PAL programmes has focused on quantitative students surveys and qualitative semi-structured research interviews with students on their student engagement and learning experience. On the other hand, this paper evaluates the intervention through conducting a quantitative statistical analysis of the student records to evaluate the impact of PAL on a cohort’s performance on different social categories (classifications) and compares the results to a cohort of another group with a similar student profile, but without PAL intervention implementation.

Marketing information, management and use: the case of Saudi Arabia

2019 ◽  
Vol 10 (2) ◽  
pp. 653-672
Author(s):  
Hussein Abdulla El-Omari
Keyword(s):  
Saudi Arabia ◽  
Statistical Analysis ◽  
Information Management ◽  
Muslim Country ◽  
Business Organizations ◽  
Content Type ◽  
Marketing Environment ◽  
Good Management ◽  
Industrial Organizations ◽  
Marketing Information

Purpose Obtaining, managing and using proper marketing information are considered an important strategic issue that cannot be ignored in the light of stiffening competition locally and internationally. Therefore, the purpose of this study is to examine the level of importance attached by Saudi industrial organizations to good management and use of quality marketing information. Design/methodology/approach A questionnaire method was used to collect the required data. Using a self-distributed method, the questionnaire was provided to top management levels of 80 companies from different industrial sectors in Saudi Arabia, selected randomly from a list provided by Saudi’s Chamber of Industry. Despite all attempts, only 30 completed questionnaires were returned and used in the statistical analysis for this study. This gave a response rate of 37.5 per cent. Used in this study’s statistical analysis were descriptive statistics such as frequencies, measures of central tendency such as the mean and median, measures of dispersion such as standard deviation and measures of distribution such as skewness and kurtosis. Advanced statistics, such as factor analysis statistics, were also used. Findings The study’s findings indicate how company variables are related to the ideal and actual marketing information application variables. Management’s capacity to develop a marketing plan and effectively observe the improvement may be the most demanding part of achieving desired results. This study further examined the degree to which Saudi business organizations are aware of how important it is to obtain and use proper marketing information. To develop good marketing plans, those business organizations must understand the nature of Saudi’s social structure. Its organization and welfare services are rooted in the values and traditions of Arab Muslim Culture. One of the five basic Pillars of Faith in Islam is the practice of Alms-giving and care of needy. Furthermore, people’s behavior is heavily influenced by the value, norms and expectations of Islam. Research limitations/implications This research offers a methodology to develop a better comprehension of the importance of having good management of marketing information and its use in Saudi Arabia via a description of the significant variables that form marketing information management and use. The current study also calls for more empirical research into this area of marketing in Saudi Arabia. The empirical nature of this study revealed some recommendations for future work that should look into the issues highlighted in this study. It would be useful to apply this study to other similar contexts, which may prove helpful in reexamining the validity of its results. However, further studies are needed to validate the findings of this study, as all behavioral and cultural variables were not investigated and are left for future research. In addition, this is a deductive research; therefore, some important variables may have been omitted, which is another reason for recommending more empirical studies of this type in Saudi Arabia and similar contexts. Practical implications Investigating this type of study in Saudi Arabia gives a unique implication, as it calls for better understanding of the Islamic Marketing Environment of this country, which has two important holy Mosques of Islam (i.e. Al-Haram and the Prophet’s Mosques). There is no denying that the marketing environment characteristics in any society are affected by environmental circumstances, and Saudi Arabia as the most important Muslim Country, is no exception. Originality/value The central issue of this paper is related to the importance of having, managing and using good marketing information by industrial organizations. With this issue in mind, this study was carried out in a Muslim country (i.e. Saudi Arabia). Although the Saudi market has many dealers, domestic and international trades and co-operatives, there is little relevant data about the existing marketing systems, i.e. scarcity of market data and information concerning demand, consumption, opportunities and competition.

scholarly journals THE RESEARCH OF SENTENCE LENGTH, WORDS AND PERIODICITY OF WORD FORMS IN THE COLLECTIONS OF PETRO KARMANSKY

2020 ◽  
Vol 11 (87) ◽  
Author(s):  
Liliia Solovei ◽  
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Sentence Length ◽  
Creative Work ◽  
Maximum Value ◽  
The World ◽  
Word Forms ◽  
Object Of Study ◽  
Individual Style ◽  
Linguistic Means

This work researched the linguostatistical indicators of poetic works of P. Karmansky, in particular the lengths of sentences, words and word forms are comprehensively calculated and analyzed. The following values that characterize the poet’s idiostyle are calculated: the number of values (n); maximum value (max); minimum value (min); scope (R); fashion (Mo); median (Md); average (X ̇); standard deviation (σ); coefficient of variation (V); standard error (Sx ̇); relative error (ε). The main object of study of the writer’s idiostyle is the language of his works of art, the set of linguistic means that decide the artist as an individual among others. The unified basis of all units of idiosyncrasy is the author’s worldview. Therefore, the problem of studying individual style is closely related to the problems of the linguistic picture of the world and the linguistic personality of the writer. P. Karmansky’s poetry is an interesting and little-studied phenomenon in Ukrainian literature. In listening to a number of researchers considered the life of P. Karmansky, separately thematic work, characterized by the peculiarities of those who compose his poetics. Instead, the creative work of P. Karmansky did not become the object of linguistic and statistical analysis, which determines the relevance and novelty of the study. The research corpus systematizes the author's poetry is systematized on the basis of his collections, publications in contemporary periodicals and manuscripts. The material of the study was the texts of Petro Karmansky’s collection «Poeziyi», published in Kyiv by «Ukrayinskyy pysmennyk» in 1992, which is considered one of the most complete collections, containing previously unpublished poems (the total number of poems in this collection - 334). The analysis showed that Karmansky used to use sentences of four words and words of four letters. The list of the nine most common word forms that appeared in Karmansky’s selected poems is «і» – 1714 times, «в» – 1157 times, «не» – 605 разів, «з» – 532, «на» – 507, «що» – 461, «як» – 429, «я» – 326, «а» – 207. It turns out how the poetic handwriting of the artist changed during his life.It turns out how the poetic handwriting of the artist changed during his life.

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