scholarly journals Breaking force analysis of cotton ring-spun yarns

2020 ◽  
Vol 71 (03) ◽  
pp. 223-226
Author(s):  
POLONA DOBNIK DUBROVSKI
Keyword(s):  
Production Efficiency ◽  
Evaluation Method ◽  
Climatic Conditions ◽  
Gauge Length ◽  
Breaking Force ◽  
Force Analysis ◽  
Testing Conditions ◽  
Constant Rate ◽  
Spun Yarns ◽  
Length Constant

The most important factor influencing the production efficiency of final textile products made from yarns as well as the product performance are the tensile properties of the yarn. The breaking force of spun yarns, assessed with standard static procedure, depends on several parameters, one of them being the testing conditions. In our research, the effect of testing conditions (climatic conditions, the ratio gauge length/constant rate of extension and sampling, which refers to the number of yarn package and the position of package winding, taken from the bobbin) on the breaking force of 100% cotton ring-spun yarns was analyzed using the statistical evaluation method “ANOVA”. The results clearly indicate that indeed all input parameters of testing conditions have a statistically significant effect on the breaking force of the yarn. When we judge the suitability of yarns to withstand a certain tension produced by technological procedures, not only average breaking force should be focused on. The information regarding the tested minimum breaking force of yarn becomes very important regarding our decision whether yarn fulfills the prescribed value of breaking force.

Exploring the water–energy–food nexus from a perspective of agricultural production efficiency using a three-stage data envelopment analysis modelling evaluation method: a case study of the middle and lower reaches of the Yangtze River, China

Water Policy ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 49-72 ◽  
Author(s):  
Jiazhong Zheng ◽  
Weiguang Wang ◽  
Dan Chen ◽  
Xinchun Cao ◽  
Wanqiu Xing ◽  
...  
Keyword(s):  
Data Envelopment Analysis ◽  
Agricultural Production ◽  
Yangtze River ◽  
Production Efficiency ◽  
Evaluation Method ◽  
Data Envelopment ◽  
The Yangtze River ◽  
Agricultural Resources ◽  
Important Challenge

Abstract A coordinated nexus of agricultural resources is vital to achieve food security and sustainable development in China. Comprehensively considering the water–energy–food nexus as well as the external environment, this study adopts a three-stage data envelopment analysis (DEA) modelling evaluation method to assess the agricultural production efficiency (APE) of seven provinces in the middle and lower reaches of the Yangtze River (MLYR) during 1996–2015. The results show that the three-stage DEA modelling evaluation method reveals real APE and is considered to be a better quantitative method than conventional approaches. A gradually widening range of APE is an important challenge for this region. Significantly, this region generates huge demands for agricultural resources. Moreover, regional emissions of greenhouse gases (GHG) decreased from 34.20 million tons standard coal in 1996 to 32.11 million tons standard coal in 2015, though APE has continued to decrease by 2.56% in the past two decades. In general, the management and technology levels should be improved simultaneously, even though specific opportunities for APE improvement vary across provinces in MLYR. However, understanding the temporal and spatial variation of APE along with the WEF nexus from a production-based insight is a vital step toward appropriately targeted policy making for nationwide resources savings and emissions reduction.

Reducing Yarn Hairiness in a Modified Ring Spinning Yarn Path by Various Offsets

2011 ◽  
Vol 331 ◽  
pp. 493-497
Author(s):  
Xu Zhong Su ◽  
Wei Dong Gao ◽  
Ting Ting Wu ◽  
Xin Jin Liu ◽  
Yun Zhang
Keyword(s):  
Critical Region ◽  
Breaking Force ◽  
Ring Spinning ◽  
Fiber Tension ◽  
Yarn Properties ◽  
Spun Yarns ◽  
Spinning Process ◽  
Spinning Triangle ◽  
Yarn Hairiness ◽  
The Right

Spinning triangle is a critical region in the spinning process of yarn. Its geometry influences the distribution of fiber tension in the spinning triangle and the properties of spun yarns, such as the yarn breakage and hairiness. In this paper, the relationships between the spinning angle and yarn properties especially the yarn hairiness were investigated under various horizontal offsets. The properties of spun yarns produced by the modified system were evaluated and analyzed. Both left diagonal and right diagonal yarn arrangements were examined. The results indicate that the right diagonal yarn path leads to reduce yarn hairiness but the left diagonal yarn path leads to increase yarn hairiness; the breaking force of yarn changes little; yarn evenness deteriorates slightly with the changes of offset.

scholarly journals Dairy buffalo production scenario in Bangladesh: a review

2017 ◽  
Vol 3 (3) ◽  
pp. 305-316 ◽  
Author(s):  
Md Rezwanul Habib ◽  
Md Najmul Haque ◽  
Ashikur Rahman ◽  
Md Aftabuzzaman ◽  
Md Mahabbat Ali ◽  
...  
Keyword(s):  
National Economy ◽  
Production Efficiency ◽  
Management Practices ◽  
Coastal Region ◽  
Flood Plain ◽  
Climatic Conditions ◽  
Meat Production ◽  
Good Nutrition ◽  
Small Holders ◽  
Dairy Buffalo

The objective of this review is to draw the present scenario of dairy buffalo production in Bangladesh and their contributions to the national economy. Buffaloes in Bangladesh are mostly indigenous type encompasses with swamp and river and are distributed throughout the country. However, the population is higher in coastal part, Meghna-Ganga and Jamuna-Brahamaputra flood plain, considered to be the buffalo pockets. The total buffalo population is 1.471 million which are mostly managed in household subsistence farming as well as bathan in coastal region. Buffaloes are normally used as a draught animal and in lower extent partially for milk and meat production. Most of the farmers are rural small holders; traditionally practiced crop-livestock integration upon which the management practices of buffalo usually depends. Buffaloes are raised in homestead and approximately 5-7 hours were grazes per day in household farming. Small amount of concentrate is usually offered to buffalo during dry season only by the economically viable farmers. On the other hand, in bathan, farmers are fully depended on grazing at public fallow land. Lower milk production efficiency, poor reproductive performance followed by under nutrition and low growth rate in buffaloes resulted insignificant contribution to the national economy of Bangladesh. Balanced nutrition and better management practices can improve buffalo productivity. In order to do so, a number of issues are required to be addressed such as establishment of nutrient requirements for dairy, development of buffalo calf feeding systems, artificial insemination technique, nutritional management of metabolic and reproductive anomalies, and understanding and exploitation of the buffalo gut ecosystem. Productivity of buffaloes can be mainly depended on genetic improvement, good nutrition, good management and also climatic conditions of an area. Extensive coordinated research and extension efforts are required for increasing dairy buffalo production in this country.Asian J. Med. Biol. Res. September 2017, 3(3): 305-316

Performance of the pear (Pyrus communis) cultivar William's Bon Chretien grafted on seven rootstocks

2006 ◽  
Vol 46 (5) ◽  
pp. 701 ◽  
Author(s):  
T. E. Sotiropoulos
Keyword(s):  
Production Efficiency ◽  
Iron Concentration ◽  
Pyrus Communis ◽  
Climatic Conditions ◽  
Pyrus Communis L

The performance of the pear (Pyrus communis L.) cv. William’s Bon Chretien (William’s BC) grafted on 7 rootstocks was evaluated over a period of 8 years. The scions of the cultivar William’s BC were grafted on the following 7 rootstocks: (i) P. communis seedlings, (ii) quince BA 29, (iii) quince A, (iv) Pomology Institute (PI) 1, (v) PI 5, (vi) PI 27, and (vii) quince Komotinis (iv–vii are Greek local quince seedlings). Compatibility of William’s BC with P. communis, PI 1 and PI 27 was excellent and no tree losses occurred. The highest yield per tree was recorded when William’s BC was grafted on PI 5 rootstock, although it was not significantly different from P. communis. The lowest yield was recorded when the cultivar was grafted on BA 29 rootstock. Production efficiency of William’s BC was highest when grafted on PI 27, intermediate on quince A, PI 1 and PI 5 and lowest on P. communis. Iron concentration of leaves of scions grafted on P. communis, BA 29, quince A and quince Komotinis were significantly lower than those grafted on PI 5. From the results it is concluded that the rootstocks PI 1 and PI 27 are suitable for the cv. William’s BC under Greek or other similar climatic conditions.

scholarly journals Framework for Evaluating Financial Impacts of Technical Risks Related to Energy-Efficient Renovation of Commercial Office Buildings

2021 ◽  
Vol 11 (1) ◽  
pp. 32
Author(s):  
Annalisa Andaloro ◽  
Graziano Salvalai ◽  
Gabriele Fregonese ◽  
Linda Tso ◽  
Giulia Paoletti
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Evaluation Method ◽  
Climatic Conditions ◽  
Office Buildings ◽  
Mitigation Measures ◽  
Building Energy Efficiency ◽  
Existing Building ◽  
Technical Risks ◽  
Financial Impacts

Energy efficiency in the building sector is a priority of the EU Commission to achieve carbon neutrality by 2050. Renovation of the existing buildings, which are currently responsible for approximately 40% of EU energy consumption and 36% of the greenhouse gas emissions can lead to significant energy savings. This paper presents the EEnvest calculation method for evaluating the financial impacts of technical risks related to energy-efficient renovation of commercial office buildings. The evaluation method aims to increase investors’ confidence and boost investments in the renovation of the existing building. Through a series of Key Performance Indicators (KPI), the technical and financial risks impact is evaluated. The results are strictly connected to building features, climatic conditions, solution sets and mitigation measures specific to the building energy efficiency project.

scholarly journals A Study on the Night Visibility Evaluation Method of Color Temperature Convertible Automotive Headlamps Considering Weather Conditions

2021 ◽  
Vol 11 (18) ◽  
pp. 8661
Author(s):  
Ho-Joon Kang ◽  
Seong-Jin Kwon
Keyword(s):  
Evaluation Method ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Light Transmittance ◽  
Color Temperature ◽  
Driving Safety ◽  
Clear Night ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Bad Weather

This study evaluated a method of applying color temperature convertible headlamps to improve driving safety in adverse weather conditions such as fog and rain during night driving. The concept of color temperature convertible headlamps is to improve the driver’s visibility by driving with a color temperature of 6000 K on a clear night and switching to a color temperature of 3000 K with better light transmittance at night in adverse weather. Through this study, a method for evaluating the night visibility related to such color temperature convertible headlamps under bad weather at night was suggested. To this end, a method of using a facility that can implement weather conditions such as fog and rain was proposed, and evaluation conditions according to the climatic conditions and the distance of pedestrian targets were set and actual tests were conducted.

Rapidly adapting receptor activity in dogs is inversely related to lung compliance

1986 ◽  
Vol 61 (5) ◽  
pp. 1980-1987 ◽  
Author(s):  
A. Jonzon ◽  
T. E. Pisarri ◽  
J. C. Coleridge ◽  
H. M. Coleridge
Keyword(s):  
Inflation Rate ◽  
Impulse Activity ◽  
Lung Compliance ◽  
Excitatory Input ◽  
Rate Of Change ◽  
Positive End Expiratory Pressure ◽  
Vagus Nerves ◽  
Constant Rate ◽  
Length Constant ◽  
Dynamic Lung Compliance

We examined the response of pulmonary rapidly adapting receptors (RAR′s) to changes in dynamic lung compliance (Cdyn) in the physiological range. RAR impulse activity was recorded from the cervical vagus nerves in anesthetized open-chest dogs whose lungs were ventilated at constant rate and tidal volume (VT), with a positive end-expiratory pressure (PEEP) of 3–4 cmH2O. After hyperinflation to produce maximal Cdyn, RAR′s were silent or fired sparsely and irregularly. Reducing Cdyn in steps by briefly removing PEEP increased firing proportionately, and RAR′s began to discharge vigorously in inflation. Activity was restored to control by hyperinflating the lungs. Activity also increased when we increased inflation rate, and hence the rate of change of airway pressure (dP/dt), by reducing inflation time, keeping VT and cycle length constant. RAR′s were stimulated more when dP/dt was increased by reducing compliance than when dP/dt was increased by increasing inflation rate. We conclude that RAR′s are sensitive to changes in Cdyn and speculate that excitatory input from RAR′s may help to maintain VT as the lungs become stiffer.

Sign in / Sign up

Export Citation Format

Share Document