Woven Apparel Fabrics

This chapter considers the different woven manufacturing processes used in the production of apparel fabrics. It details the mainapparel fabric types and looks at the key performance requirements of those fabrics, in relation to both the weave structure and the fibre type. The chapter then goes on to briefly describe important considerations in the design process and the various end uses for woven fabric. Application examples detailed towards the end of the chapter include fabrics that are timeless classics and fabrics that are established fashion favourites. Key words: apparel, design, applications, performance, fabric aesthetics

Modification of Drafting Zone of Jute Flyer Spinning Frame to Improve the Jute Yarn Quality

Being concerned with the growth and sustainability of the jute industry of Bangladesh, the machinery modifications deserves higher priority. In this work, it is desired to perform a modification of the apron draft spinning frame to improve the jute yarn quality. However, the existing drawing pressing roller (Diameter=70 mm & Durometer hardness = 96 in Shore A Scale) of the drafting zone of the apron draft jute spinning frame has been replaced by a comparatively softer rubber coated top roller (diameter= 40 mm & Durometer hardness = 85 in Shore A Scale). Besides, an extra slotted roller (Diamter= 26 mm & Durometer hardness = 74 in Shore A Scale) has also been nipped with bottom drawing roller and positioned parallel to the modified top roller. Three types of modifications have been designed by varying slot angles (i.e., 45°, 60°, and 75°) of slotted roller attached with the modified top roller. Finally, jute yarn counts of 6.5, 8, and 10 lbs/spyndle have been produced for both existing and modified frames. Results reveal that the modified spinning frame with all three types of slotted roller produced better results regarding the yarn hairiness compared to the existing frame irrespective of yarn fineness. Yarn hairiness values in modified frame with 60° slotted roller have been decreased maximum by 28.1%, 35.85%, and 32.92% compared to that of the existing system for 6.5, 8, and 10 lbs/spyndle respectively. Yarn strength results have been improved with the modified system as well. Lastly, it is seen that ends down rate in modified spinning frames have been reduced noticeably irrespective of yarn fineness

MPJ Express meets YARN:towards Java HPC on Hadoop systems

AbstractMany organizations—including academic, research, commercial institutions—have invested heavily in setting up High Performance Computing (HPC) facilities for running computational science applications. On the other hand, the Apache Hadoop software—after emerging in 2005— has become a popular, reliable, and scalable open-source framework for processing large-scale data (Big Data). Realizing the importance and significance of Big Data, an increasing number of organizations are investing in relatively cheaper Hadoop clusters for executing their mission critical data processing applications. An issue here is that system administrators at these sites might have to maintain two parallel facilities for running HPC and Hadoop computations. This, of course, is not ideal due to redundant maintenance work and poor economics. This paper attempts to bridge this gap by allowing HPC and Hadoop jobs to co-exist on a single hardware facility. We achieve this goal by exploiting YARN—Hadoop v2.0—that de-couples the computational and resource scheduling part of the Hadoop framework from HDFS. In this context, we have developed a YARN-based reference runtime system for the MPJ Express software that allows executing parallel MPI-like Java applications on Hadoop clusters. The main contribution of this paper is provide Big Data community access to MPI-like programming using MPJ Express. As an aside, this work allows parallel Java applications to perform computations on data stored in Hadoop Distributed File System (HDFS)

Braiding simulation for RTM preforms

Braiding is a manufacturing process that is increasingly being used to manufacture pre-forms for Resin Transfer Moulding. A fast simulation method is presented for the prediction of the fibre distribution on complex braided parts and complex kinetic situations (e.g. changes in velocity, orientation). The implementation is suited for triangular surface representations as generated by many CAD software packages in use. Experimental results are presented to validate the model predictions, showing an acceptable correlation with the data predicted by the simulation method. The guide ring dimensions and spacing appear to have a significant effect on the accuracy of the predicted fibre orientations

Linguistic Markers of Influence in Informal Interactions

There has been a long standing interest in understanding `Social Influence' both in Social Sciences and in Computational Linguistics. In this paper, we present a novel approach to study and measure interpersonal influence in daily interactions. Motivated by the basic principles of influence, we attempt to identify indicative linguistic features of the posts in an online knitting community. We present the scheme used to operationalize and label the posts with indicator features. Experiments with the identified features show an improvement in the classification accuracy of influence by 3.15%. Our results illustrate the important correlation between the characteristics of the language and its potential to influence others.Comment: 10 pages, Accepted in NLP+CSS workshop for ACL (Association for Computational Linguistics) 201

Furniture Fabrics

Exact date of bulletin unknown.PDF pages: 1

Towards numerical simulation of yarn insertion on air-jet weaving looms

In this research a structural solver and flow solver are coupled to simulate the motion of a nylon yarn as it is launched into the atmosphere by a main nozzle of an air-jet weaving loom. The high-speed air flow, large displacements of the yarn, 3D-nature of the problem and the contact between yarn and nozzle wall pose substantial challenges to both solvers. Furthermore, the large displacements necessitate a two-way coupling which drastically increases the computational time required. In fluid-structure interaction simulations, the flexible structure is often modelled using continuum elements. However, in this work, the use of beam theory to model the yarn is investigated. Switching to beam theory allows reducing the computational time required for the structural solver, but requires adaptations to the fluid-structure interaction code so that forces are projected onto the centreline and centreline displacements are converted into 3D displacements of the surface nodes. To validate the use of beam elements, a structural simulation is performed in which a section of the yarn is mechanically pulled through the main nozzle. Afterwards the correct functioning of the beam elements is tested by performing a fluid-structure interaction simulation on a 3D, cantilevered beam in cross-flow. Finally, a simulation is performed in which a nylon yarn (diameter 0.72 mm) is unwound by the main nozzle air flow (5 bar gauge) and launched into the atmosphere. The gain in computational time by switching to beam elements is evaluated