47 research outputs found

    Influence of cultural ethos on portfolio writing: reflection among faculty and students

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    As times are changed, the change is fett in teaching-learning process too. Those days class rooms were teacher-centered. Students were at the receiving end. And they were expected to reproduce what they have received. Learning hardly had real life situations. They were content based and compartmentalized. But today's classrooms expect interactions, questioning, responding and reflecting on both sides. There is synergy of thoughts, ideas and intellectual expertise. Ultimately, today's teachers lend their hands towards bringing up productive citizens. A portfolio is a portable, systematic, purposeful collection of work, selected to provide information about attitude, level of development and growth during a given period of time. It is a powerful visual tool that provided evidence of personal reflections, learning growth and development and a comprehensive and complex overview of skills. The success of a learner lies on goal orientation. The goal oriented individual has to have a watch over on his progress. Portfolios provide students with the opportunity to see how they have progressed as learners. Students begin to reflect on their strengths as a learner, areas where they need to improve, what constitutes quality work and how their work reflects the expected standards. Here portfolio is a tool for self-monitoring and self-evaluation and it is useful as a 'marketing tool' in the job search process. Today's classroom environment reflects the cultural ethos. The tone and the style of the message the teacher carries to his class, his expertise in the Meld, and integrity reflect in the success of his teaching. He has to have teaching goals, teaching philosophy and design for learner's portfolio. Maintaining portfolio writing both on the part of teacher as well as the learner develop healthy learning culture towards social development It results in development of human resources for economic development of the country

    Influence of fibre length and denier on properties of polyester ring and air-jet spun yarns

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    163-168The effect of polyester fibre length and denier on hairiness, abrasion resistance, flexural rigidity, co-efficient of friction and compressional energy of air-jet and ring-spun yarns has been studied. It is observed that the yarn hand in terms of flexural rigidity and compressional energy improves by using finer fibres in air-jet yarns. Increase in fibre length decreases the yarn hairiness, abrasion damage and yarn-to-metal friction in both air-jet and ring yarns. Finer fibres decrease the hairiness and abrasion damage and increase the yarn-to-metal friction in both air-jet and ring yarns

    Role of fibre properties in colour non-uniformity of dyed fabrics

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    296-301<span style="font-size: 15.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">The variation in colour uniformity <span style="font-size:14.5pt;mso-bidi-font-size: 8.5pt;font-family:" times="" new="" roman","serif""="">(Δ<i style="mso-bidi-font-style: normal">E) <span style="font-size:15.0pt;mso-bidi-font-size:9.0pt; font-family:" times="" new="" roman","serif""="">of dyed fabrics has been measured by spectrophotometer. Difference in micronaire value, maturity ratio and fluorescence have been identified as the major fibre properties which influence shade variation in dyed fabrics. A comprehensive study has been carried out to establish the limits for variation in above fibre properties of the mixing used for spinning yarns in order to maintain high level of colour uniformity in dyed fabrics. Image processing technique was employed in the study for assessing cotton fibre maturity. Fibre properties of cotton mixing for maintaining acceptable <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt; font-family:" times="" new="" roman","serif""="">ΔE of 1 in dyed fabrics have been suggested using prediction expression connecting fibre properties with <span style="font-size:14.5pt;mso-bidi-font-size: 8.5pt;font-family:" times="" new="" roman","serif""="">Δ<i style="mso-bidi-font-style: normal">E. <span style="font-size:15.0pt;mso-bidi-font-size:9.0pt; font-family:" times="" new="" roman","serif""="">It has also been observed that the fabrics made out of man-made fibres exhibit shade variation after dyeing. The extent of <span style="font-size:14.5pt;mso-bidi-font-size:8.5pt;font-family: " times="" new="" roman","serif""="">ΔE value in these fabrics, as measured by spectrophotometer, has been found to be around 0.5. </span

    Yarn quality improvement with an air-jet attachment in cone winding

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    289-294An air-jet nozzle for cone winding machine was designed and fabricated to decrease the hairiness of yarn and, thereby, to control the deterioration in yarn quality. Yarn quality improvement in five different counts (two carded and three combed) was studied using air- jet nozzles of three different orifice angles (30°, 45° and 60°) and three different air pressures (0.5 kg/cm2, 1.0 kg/cm2 and 1.5 kg/cm2). It has been observed that the best results are achieved with air-jet nozzle of 60° orifice angle and 1.0 kg/cm2 air pressure. Using this nozzle during winding, the hairs in ring yarn decrease by 50-75%. Hence, the use of air-jet nozzle in cone winder helps to maintain the quality of wound yarns at par with that of ring yarns

    Effect of spindle speed on end breakage and yarn quality while using lower package size

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    83-85<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The effect of spindle speed on yarn quality and end breakage rate while using lower package size has been studied. It is possible to increase the spindle speed even by 20% in the case of 40s and finer counts while using lower package size which would offer a saving of Rs. 140/spindle/year. Yarn quality attributes like strength, evenness and thick places are not affected at higher spindle speeds whereas thin places, hairiness and CV of strength show a tendency to increase with spindle speed.</span

    Influence of rotor speed in open-end spinning on yarn quality

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    164-168<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" new="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">The change in yam quality with rotor speed has been investigated for 6 different mixings made out of natural/man-made fibres. Above 40,000 rpm, polyester tends to become weaker whereas cotton, viscose and polyester blends remain unaffected up to 55,000 rpm. Evenness and imperfections deteriorate for all the fibre types as rotor speed increases. Explanations based on theoretical considerations have been offered for the observed phenomena.</span

    Performance of man-made fibres in rotor spinning system

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    133-136<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">A comprehensive study to assess the suitability of rotor spinning system for man-made fibres (MMF) and their blends has been carried out. OE yarns from MMF have been found 30-35% weaker than their ring counterparts. While the evenness is better for MMF rotor-spun yarns, the various imperfection sare also less in MMF yarns by 15-20%.</span

    Influence of wire point density in cards and combers on neps in sliver and yarn quality

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    9-15Card slivers were produced from two Indian cottons of micronaire values 2.7 and 3.1 in a 4th generation card using flat tops of five different wire point densities and spun into 80s and 100s combed yarns. Card sliver neps as well as imperfections in the corresponding yarn samples produced using those slivers were estimated. Conducting trials were also carried out using cylinder wires, flat tops and combing segments of variable density. Cylinder wires of variable density in card reduce sliver and yarn nep content by about 35%. Combing segments with 4 partitions in comber produce slivers and yarns with about 25% lower neps as compared to combing segments of 2 partitions. </span
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