scholarly journals Impact of Different Weft Materials and Washing Treatments on Moisture Management Characteristics of Denim

2012 ◽  
Vol 7 (1) ◽  
pp. 155892501200700 ◽  
Author(s):  
Muhammad Mushtaq Mangat ◽  
Tanveer Hussain ◽  
Vladimir Bajzik
Keyword(s):  
Test Data ◽  
Statistical Analyses ◽  
Weft Yarn ◽  
Cotton Yarn ◽  
Moisture Management ◽  
Different Types

The aim of this study was to investigate the effects of different types of weft yarn materials and washing treatments on the moisture management properties of denim fabrics. Fabrics were developed with five different types of weft yarns made of cotton, polyester, spun polypropylene, air-textured polypropylene and stuffer-box crimped polypropylene. In all cases 100% cotton yarn was used as warp. Samples from each fabric were subjected to 10 diverse types of washing/finishing treatments and the treated samples were tested for dissimilar moisture management indices on an SDL Atlas moisture management tester. The statistical analyses of the test data show that the effect of different types of weft yarns and washing treatments is significant. Based on the results of this study, denim fabrics can be developed with enhanced moisture management properties.

scholarly journals Preparation and application of different size materials on the cotton yarn and investigating the effect of sizing on the tensile properties of cotton yarn

2014 ◽  
Vol 49 (1) ◽  
pp. 25-30
Author(s):  
S Sultana ◽  
MZ Haque ◽  
HP Nur
Keyword(s):  
Tensile Properties ◽  
Water Soluble ◽  
Woven Fabric ◽  
Seed Kernel ◽  
Cotton Yarn ◽  
Textile Production ◽  
Tamarind Seed ◽  
Different Types ◽  
Cotton Yarns ◽  
Pre Treatment

Sizing of the cotton yarn is essential to reduce breakage of the yarn due to abrasion during weaving process. The sizing agent on the woven fabric after weaving needs to remove completely before the next textile production process of dyeing and finishing. So, water soluble sizing agent is easy to handle and easy to desizing for pre-treatment of woven fabric. In this work, different types of water soluble tamarind seed kernel based sizing formulations (assigned by A, B and C) were made and applied on cotton yarn to investigate the effect on the tensile properties of sized and unsized cotton yarns. Cotton yarn treated with size B formulation shows the better tensile properties than the application of size A and size C formulation. The effect of lubricant has also been investigated and shows that the addition of lubricant decreases the tensile properties of the cotton yarn. DOI: http://dx.doi.org/10.3329/bjsir.v49i1.18850 Bangladesh J. Sci. Ind. Res. 49(1), 25-30, 2014

The Choice of the Propeller

1966 ◽  
Vol 3 (02) ◽  
pp. 158-171
Author(s):  
J. D. van Manen
Keyword(s):  
Test Data ◽  
Model Test ◽  
Testing Technique ◽  
Full Size ◽  
Cavitation Inception ◽  
Different Types

In this paper the four main requirements for a propeller are dealt with. These requirements concern efficiency, cavitation, propeller-excited forces and stopping abilities. In a propeller diagram the characteristic efficiency curves for different conditions are explained. A comparison of the optimum efficiencies for various types of propulsors is given, and the applications on a 130,000-dwt tanker are considered. Cavitation-inception curves both for a specific propeller and for systematic propeller series are discussed. Predicted torque and thrust fluctuations, based on model-test data, and the results of measurements on the full-size ship are compared. Finally a quasi-steady testing technique, developed to analyze different types of stopping maneuvers, is described.

Characteristic S-N Curves for Fatigue Design of Titanium Risers

2002 ◽  
Author(s):  
Knut O. Ronold ◽  
Stig Wa¨stberg
Keyword(s):  
Fatigue Test ◽  
Test Data ◽  
Base Material ◽  
Offshore Structures ◽  
Defect Size ◽  
Statistical Analyses ◽  
Stress Range ◽  
Fatigue Design ◽  
Range Interval ◽  
Lower Tolerance

A recommended practice for design of titanium risers is currently being developed as part of Det Norske Veritas’ series of standards and recommended practices for offshore structures. A recommendation is given herein for characteristic S-N curves for use in design of titanium risers against fatigue failure. As a basis for this recommendation, a set of statistical analyses of available fatigue test data have been carried out. Separate analyses have been carried out for base material and welds. The analysis results have been interpreted with respect to mean S-N curves as well as 97.7% lower tolerance bounds with 95% confidence. Characteristic S-N curves for base material and welds, which are not non-conservative with respect to these tolerance bounds, have been proposed. The paper presents the assumptions, the test data, the statistical analyses and their results, and the proposed characteristic S-N curves. The areas of application of the proposed curves are discussed with a particular view to stress range interval, material grade, weld position, temperature, and defect size.

Tensile and Tearing Strength Properties of Printed Cotton Fabric Using Warp Yarn Printing Technique

2016 ◽  
Vol 848 ◽  
pp. 158-161
Author(s):  
Kittisak Ariyakuare ◽  
Charoon Klaichoi ◽  
Naruepon Phaisarntantiwong ◽  
Songkram Senatham
Keyword(s):  
Tensile Strength ◽  
Strength Properties ◽  
Weft Yarn ◽  
Cotton Yarn ◽  
Warp Yarn ◽  
Iso Standard ◽  
Three Samples ◽  
Printing Technique ◽  
White Cotton ◽  
Tearing Strength

Warp yarn of cotton samples were printed with pigment dyes has been investigated. The printed warp yarn was weaved by using white cotton yarn as a weft yarn. The physical properties were evaluated to testing in tensile strength and tearing strength of weaved samples, the test were determined according to ISO standard. The results showed that the tensile strength of three samples are shown to be in the range between 210 and 342 Newtons whereas tearing strength was in the range between 30 and 110 Newtons. The results indicated that the properties of printed samples (handling) were good to very good level.

Recent Developments in Hydraulic Couplings

1935 ◽  
Vol 130 (1) ◽  
pp. 75-190 ◽  
Author(s):  
Harold Sinclair
Keyword(s):  
Test Data ◽  
Good Deal ◽  
Hydraulic Coupling ◽  
Different Types ◽  
Recent Developments ◽  
History Of ◽  
Torque Converters ◽  
The Difference

The use of hydraulic couplings in practically all fields of engineering has increased rapidly during the last few years. The paper traces the history of the Vulcan-Sinclair hydraulic coupling, which is of the turbo or hydro-kinetic type, from the days of its inception up to the present time, and gives details of other designs of the displacement or hydro-static type that have been developed, and the principles upon which they operate. The main advantages of the turbo design are enumerated and considerable test data are given, with particular reference to the Vulcan coupling, which, in theory, is the forerunner of the Vulcan-Sinclair designs. Advantage is taken to explain the difference between fluid couplings and torque converters, concerning which a good deal of confusion exists. The differences between the various types of Vulcan-Sinclair hydraulic couplings and the improvements that have been effected in design during recent years are described in detail. The paper deals comprehensively with numerous applications of the different types of couplings covering both the industrial and automotive fields. The difficulties, and their cures, which have arisen in connexion with a number of applications are given prominence. A section deals with change-speed gearboxes arranged in conjunction with hydraulic couplings for use in Diesel traction.

scholarly journals A Corpus-based Study of EFL Learners’ Errors in IELTS Essay Writing

2017 ◽  
Vol 6 (3) ◽  
pp. 143 ◽  
Author(s):  
Hoda Divsar ◽  
Robab Heydari
Keyword(s):  
Statistical Analyses ◽  
Word Choice ◽  
Error Type ◽  
Essay Writing ◽  
Efl Learners ◽  
Coding Scheme ◽  
Error Coding ◽  
Verb Forms ◽  
Different Types ◽  
Writing Errors

The present study analyzed different types of errors in the EFL learners’ IELTS essays. In order to determine the major types of errors, a corpus of 70 IELTS examinees’ writings were collected, and their errors were extracted and categorized qualitatively. Errors were categorized based on a researcher-developed error-coding scheme into 13 aspects. Based on the descriptive statistical analyses, the frequency of each error type was calculated and the commonest errors committed by the EFL learners in IELTS essays were identified. The results indicated that the two most frequent errors that IELTS candidates committed were related to word choice and verb forms. Based on the research results, pedagogical implications highlight analyzing EFL learners’ writing errors as a useful basis for instructional purposes including creating pedagogical teaching materials that are in line with learners’ linguistic strengths and weaknesses.

Experimental Investigation on Reaeration Performance in Parallel Flashboard Spillway

2011 ◽  
Vol 347-353 ◽  
pp. 2375-2379
Author(s):  
Ke Jian Chu ◽  
Zu Lin Hua ◽  
Li Gu ◽  
Xiao Dong Liu ◽  
Qi Ming Li
Keyword(s):  
Experimental Investigation ◽  
Froude Number ◽  
Test Data ◽  
Water Depth ◽  
Discharge Current ◽  
Oxygen Transfer ◽  
Discharge Rate ◽  
Empirical Correlations ◽  
Different Types ◽  
Drop Water

The reaeration performance in smooth and parallel flashboard spillways with 3cm, 6cm and 9cm board space over curve dams has been experimentally investigated respectively. Reaeration efficiencies of different types of spillways, in particular the effects of varying discharge rate of overflow and drop-water depth have been taken account in detail. The test data illustrates that the reaeration efficiency increases with increasing drop-water depth, and decreases with increasing discharge current; the flashboard spillways appear to offer markedly higher reaeration efficiency than the smooth spillway, which increases gradually with reduction of the space between streamwise adjacent flashboards. Empirical correlations predicting spill Froude number Fdo, relative weir depth hw/h and reaeration efficiency of different types of spillways on curve dams are developed. The results indicate that flashboard spillways are effective for oxygen transfer.

scholarly journals Organiational Structure and Created Values. Review of Methods of Studying Collective Intelligence in Policymaking

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1391
Author(s):  
Rafał Olszowski ◽  
Piotr Pięta ◽  
Sebastian Baran ◽  
Marcin Chmielowski
Keyword(s):  
Literature Review ◽  
Service Delivery ◽  
Small Groups ◽  
Systematic Literature Review ◽  
Collective Intelligence ◽  
Statistical Analyses ◽  
Future Research ◽  
Citizen Engagement ◽  
Different Types ◽  
Opening Up

The domain of policymaking, which used to be limited to small groups of specialists, is now increasingly opening up to the participation of wide collectives, which are not only influencing government decisions, but also enhancing citizen engagement and transparency, improving service delivery and gathering the distributed wisdom of diverse participants. Although collective intelligence has become a more common approach to policymaking, the studies on this subject have not been conducted in a systematic way. Nevertheless, we hypothesized that methods and strategies specific to different types of studies in this field could be identified and analyzed. Based on a systematic literature review, as well as qualitative and statistical analyses, we identified 15 methods and revealed the dependencies between them. The review indicated the most popular approaches, and the underrepresented ones that can inspire future research.

Heat and Sound Generation During Implant Osteotomy When Using Different Types of Drills in Artificial and Bovine Bone Blocks

2021 ◽  
Author(s):  
Sunee Limmeechokchai ◽  
Joseph Kan ◽  
Kitichai Rungcharassaeng ◽  
Charles J. Goodacre ◽  
Jaime Lozada ◽  
...  
Keyword(s):  
Temperature Change ◽  
Rotational Speed ◽  
Statistical Analyses ◽  
Bovine Bone ◽  
Sound Generation ◽  
Artificial Bone ◽  
Temperature Changes ◽  
Different Types ◽  
The Mean ◽  
Drilling Time

The purpose of this study was to compare heat and sound generated during implant osteotomy when different types of drill were used in artificial bone and bovine bone blocks. A total of 80 implant osteotomies were formed using 4 implant drilling systems; N1 (OsseoShaper) (Nobel), NobelActive (Nobel), V3 (MIS) and BLX (Straumann) in both artificial bone and bovine bone blocks. Thermocouple probes were used to record temperature change at the depths of 5.0 mm and 13.0 mm of each implant osteotomy formed by the final drill. In addition, thermographic images, drilling sound, and drilling time were recorded and evaluated. Statistical analyses were performed at α = 0.05. The mean temperature changes as recorded by thermocouple probes and thermocamera were significantly lower in OsseoShaper than most other drill-bone combinations (p < .05). The mean drilling times and sound generation for OsseoShaper were significantly higher and lower than most other drill-bone combinations (p < .05), respectively. Minimal heat and sound generation can be expected when implant osteotomies are performed using Osseoshaper at a low rotational speed (50 rpm) even without irrigation. However, extended drilling time is required.

An Intelligence Test Series for Blind and Low Vision Children

1990 ◽  
Vol 84 (2) ◽  
pp. 71-76 ◽  
Author(s):  
R. Dekker ◽  
P.J.D. Drenth ◽  
J.N. Zaal ◽  
F.D. Koole
Keyword(s):  
Factor Analysis ◽  
Spatial Ability ◽  
Quantitative Research ◽  
Low Vision ◽  
Statistical Analyses ◽  
Intelligence Test ◽  
Test Series ◽  
Age Norms ◽  
Different Types

An intelligence test for blind and low vision children—aged 6 to 15 years—has been constructed. Based on a short vision test, two groups of braille educated children were distinguished: children without usable vision and children with usable vision. No blindfold is used in this test. This article summarizes the results of different types of statistical analyses. Within this framework, more detailed quantitative research can be interpreted. The subtests appear to be highly reliable, and achievement in school can be predicted with some accuracy. Factor analysis indicates four interpretable factors in both vision groups. The vision groups—for which separate age-norms were established—differed mainly on tests measuring spatial ability.

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