Investigation of Effect of Roller Setting on Yarn Quality Properties in Draw Frame
In the scope of the study, it was aimed to determine the effect of the variation of the roller setting on the selected yarn properties in the first and second passage draw frame stages. For this purpose, two different draft distances were chosen for both passages and draw frame strip was produced. Then, these strips were made into yarn with constant production parameters. The hairiness, unevenness and strength properties of the yarns were tested with standard method. As a result, it was observed that increasing the draft distance affects negatively the selected three yarn properties. In this case, it has been determined that the shorter draft distance has more positive results in terms of yarn quality parameters for Şanlıurfa GAP cotton selected as the sample in the study.
PREDICTING THE DYNAMIC COHESION IN DRAFTED SLIVERS AT DRAW FRAME USING ARTIFICIAL NEURAL NETWORKS YAPAY SİNİR AĞLARI KULLANILARAK CER MAKİNESİNDE ÇEKİLMİŞ ŞERİTTE DİNAMİK KOHEZYONUN TAHMİNLENMESİ
The cohesion among the fibers in a sliver assembly plays an important role in determining the material behavior during further drafting operations. A proper control exerted on fiber to fiber friction can help to eliminate the drafting problems during the spinning process and positively influence yarn quality. The present research work aims to explain the influence on various draw frame parameters on the sliver cohesion. Cotton, Polyester and Cotton polyester blend were selected and processed using different draw frame variables. The dynamic cohesion force was measured using Rothschild Cohesion Meter. Different materials showed different level of cohesion, whereas, draw frame variables also influenced the cohesion forces in drafted slivers. An artificial neural network (ANN) model was developed to predict the sliver cohesion by using draw frame parameters as input to the ANN. The results showed that cohesion force in drafted slivers can be successfully predicted with the help of ANNs.
Affordable housing in London
Introduction. The Housing Situation in London. Housing, Land Use Planning, and the Government of London, a Brief History. Land Use Regulations. Positive Local Authority Powers in London. Sources of Affordable Housing: the Rented Sectors. Grants to Assist Access to Affordable Housing. Conclusions. Bibliography.