The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform
Irma Bowen Historic Clothing G. Collectio - One of the best experts on this subject based on the ideXlab platform.
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Cape, black silk satin with black bead embroidery, 1880s, front view
University of New Hampshire Scholars\u27 Repository, 2019Co-Authors: Irma Bowen Historic Clothing G. CollectioAbstract:1880s. Short black silk satin circular cape with bands of black bead embroidery radiating from a Mandarin collar decorated with ribbon bows. The cape is made from two half-circle pieces joined with a center-back seam and open at center front. It has a stiff 4.4 cm / 1.75 in. high collar in front which is very slightly higher in back, and is closed with one hook and eye at the base of the collar band and another placed 7.6 cm / 3 in. down along the opening. A black silk satin ribbon bow is sewn to the left front edge of the collar and another is sewn at its center back. The collar is left plain while the rest of the cloak is embellished with eleven bead-embroidered bands alternating with ten shorter rows of single beads radiating out from the neck. The eleven bands widen toward the hem and are outlined in seed beads, with interior beaded scalloped shapes surrounding large faceted beads. Thirteen to fourteen rows of seed beads fan out from the base of each band, each capped with a large faceted bead. The ten shorter rows are made with seed beads interspersed with large faceted beads. Many of the beads show evidence of corrosion, both with a whitish-gray powdery chalking or accretion on their surfaces and with yellow-brown stains where they have had prolonged contact with the acid-free tissue cushioning them in storage. This indicates that at least some of the beads are likely a popular jet substitute called Ebonite (also known as Vulcanite), an inelastic thermoplastic. This is a hard rubber, vulcanized (treated with sulfur) and susceptible to chemical deterioration as sulfuric acid is released. Other beads remain a polished black and may be jet or glass, while still others have a dark red glint suggesting they might be black garnet. The cloak is fully lined with black plain weave silk. Professionally made. Machine-sewn and hand-sewn.https://scholars.unh.edu/bowen_collection/1714/thumbnail.jp
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Cape, black silk satin with black bead embroidery, 1880s, thread count
University of New Hampshire Scholars\u27 Repository, 2019Co-Authors: Irma Bowen Historic Clothing G. CollectioAbstract:1880s. Short black silk satin circular cape with bands of black bead embroidery radiating from a Mandarin collar decorated with ribbon bows. The cape is made from two half-circle pieces joined with a center-back seam and open at center front. It has a stiff 4.4 cm / 1.75 in. high collar in front which is very slightly higher in back, and is closed with one hook and eye at the base of the collar band and another placed 7.6 cm / 3 in. down along the opening. A black silk satin ribbon bow is sewn to the left front edge of the collar and another is sewn at its center back. The collar is left plain while the rest of the cloak is embellished with eleven bead-embroidered bands alternating with ten shorter rows of single beads radiating out from the neck. The eleven bands widen toward the hem and are outlined in seed beads, with interior beaded scalloped shapes surrounding large faceted beads. Thirteen to fourteen rows of seed beads fan out from the base of each band, each capped with a large faceted bead. The ten shorter rows are made with seed beads interspersed with large faceted beads. Many of the beads show evidence of corrosion, both with a whitish-gray powdery chalking or accretion on their surfaces and with yellow-brown stains where they have had prolonged contact with the acid-free tissue cushioning them in storage. This indicates that at least some of the beads are likely a popular jet substitute called Ebonite (also known as Vulcanite), an inelastic thermoplastic. This is a hard rubber, vulcanized (treated with sulfur) and susceptible to chemical deterioration as sulfuric acid is released. Other beads remain a polished black and may be jet or glass, while still others have a dark red glint suggesting they might be black garnet. The cloak is fully lined with black plain weave silk. Professionally made. Machine-sewn and hand-sewn.https://scholars.unh.edu/bowen_collection/1720/thumbnail.jp
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Cape, black silk satin with black bead embroidery, 1880s, detail of embroidery
University of New Hampshire Scholars\u27 Repository, 2019Co-Authors: Irma Bowen Historic Clothing G. CollectioAbstract:1880s. Short black silk satin circular cape with bands of black bead embroidery radiating from a Mandarin collar decorated with ribbon bows. The cape is made from two half-circle pieces joined with a center-back seam and open at center front. It has a stiff 4.4 cm / 1.75 in. high collar in front which is very slightly higher in back, and is closed with one hook and eye at the base of the collar band and another placed 7.6 cm / 3 in. down along the opening. A black silk satin ribbon bow is sewn to the left front edge of the collar and another is sewn at its center back. The collar is left plain while the rest of the cloak is embellished with eleven bead-embroidered bands alternating with ten shorter rows of single beads radiating out from the neck. The eleven bands widen toward the hem and are outlined in seed beads, with interior beaded scalloped shapes surrounding large faceted beads. Thirteen to fourteen rows of seed beads fan out from the base of each band, each capped with a large faceted bead. The ten shorter rows are made with seed beads interspersed with large faceted beads. Many of the beads show evidence of corrosion, both with a whitish-gray powdery chalking or accretion on their surfaces and with yellow-brown stains where they have had prolonged contact with the acid-free tissue cushioning them in storage. This indicates that at least some of the beads are likely a popular jet substitute called Ebonite (also known as Vulcanite), an inelastic thermoplastic. This is a hard rubber, vulcanized (treated with sulfur) and susceptible to chemical deterioration as sulfuric acid is released. Other beads remain a polished black and may be jet or glass, while still others have a dark red glint suggesting they might be black garnet. The cloak is fully lined with black plain weave silk. Professionally made. Machine-sewn and hand-sewn.https://scholars.unh.edu/bowen_collection/1717/thumbnail.jp
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Cape, black silk satin with black bead embroidery, 1880s, detail of label
University of New Hampshire Scholars\u27 Repository, 2019Co-Authors: Irma Bowen Historic Clothing G. CollectioAbstract:1880s. Short black silk satin circular cape with bands of black bead embroidery radiating from a Mandarin collar decorated with ribbon bows. The cape is made from two half-circle pieces joined with a center-back seam and open at center front. It has a stiff 4.4 cm / 1.75 in. high collar in front which is very slightly higher in back, and is closed with one hook and eye at the base of the collar band and another placed 7.6 cm / 3 in. down along the opening. A black silk satin ribbon bow is sewn to the left front edge of the collar and another is sewn at its center back. The collar is left plain while the rest of the cloak is embellished with eleven bead-embroidered bands alternating with ten shorter rows of single beads radiating out from the neck. The eleven bands widen toward the hem and are outlined in seed beads, with interior beaded scalloped shapes surrounding large faceted beads. Thirteen to fourteen rows of seed beads fan out from the base of each band, each capped with a large faceted bead. The ten shorter rows are made with seed beads interspersed with large faceted beads. Many of the beads show evidence of corrosion, both with a whitish-gray powdery chalking or accretion on their surfaces and with yellow-brown stains where they have had prolonged contact with the acid-free tissue cushioning them in storage. This indicates that at least some of the beads are likely a popular jet substitute called Ebonite (also known as Vulcanite), an inelastic thermoplastic. This is a hard rubber, vulcanized (treated with sulfur) and susceptible to chemical deterioration as sulfuric acid is released. Other beads remain a polished black and may be jet or glass, while still others have a dark red glint suggesting they might be black garnet. The cloak is fully lined with black plain weave silk. Professionally made. Machine-sewn and hand-sewn.https://scholars.unh.edu/bowen_collection/1719/thumbnail.jp
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Cape, black silk satin with black bead embroidery, 1880s, back view
University of New Hampshire Scholars\u27 Repository, 2019Co-Authors: Irma Bowen Historic Clothing G. CollectioAbstract:1880s. Short black silk satin circular cape with bands of black bead embroidery radiating from a Mandarin collar decorated with ribbon bows. The cape is made from two half-circle pieces joined with a center-back seam and open at center front. It has a stiff 4.4 cm / 1.75 in. high collar in front which is very slightly higher in back, and is closed with one hook and eye at the base of the collar band and another placed 7.6 cm / 3 in. down along the opening. A black silk satin ribbon bow is sewn to the left front edge of the collar and another is sewn at its center back. The collar is left plain while the rest of the cloak is embellished with eleven bead-embroidered bands alternating with ten shorter rows of single beads radiating out from the neck. The eleven bands widen toward the hem and are outlined in seed beads, with interior beaded scalloped shapes surrounding large faceted beads. Thirteen to fourteen rows of seed beads fan out from the base of each band, each capped with a large faceted bead. The ten shorter rows are made with seed beads interspersed with large faceted beads. Many of the beads show evidence of corrosion, both with a whitish-gray powdery chalking or accretion on their surfaces and with yellow-brown stains where they have had prolonged contact with the acid-free tissue cushioning them in storage. This indicates that at least some of the beads are likely a popular jet substitute called Ebonite (also known as Vulcanite), an inelastic thermoplastic. This is a hard rubber, vulcanized (treated with sulfur) and susceptible to chemical deterioration as sulfuric acid is released. Other beads remain a polished black and may be jet or glass, while still others have a dark red glint suggesting they might be black garnet. The cloak is fully lined with black plain weave silk. Professionally made. Machine-sewn and hand-sewn.https://scholars.unh.edu/bowen_collection/1716/thumbnail.jp
Mohammad Asaduzzaman Chowdhury - One of the best experts on this subject based on the ideXlab platform.
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friction coefficient of polymer and composite materials sliding against stainless steel
Advanced Materials Research, 2012Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Asaduzzaman ChowdhuryAbstract:An endeavor has been made to study and compare the friction coefficient of different polymer and composite materials. Experiments were carried out when stainless steel 304 (SS 304) pin slides on different types of composite and polymer materials such as cloth reinforced ebonite (commercially known as gear fiber), glass fiber reinforced plastic (glass fiber), nylon and polytetrafluoroethylene (PTFE). Experiments were conducted at normal load 5, 7.5, 10 N, sliding velocity 0.5, 0.75, 1 m/s and relative humidity 70%. Variations of friction coefficient with the duration of rubbing at different normal loads and sliding velocities were investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases with the increase in normal load and sliding velocity for all the tested materials except nylon. At identical operating conditions, the magnitudes of friction coefficient are different for different polymer and composite materials.
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friction coefficient and wear rate of polymer and composite materials at different sliding speeds
International Journal of Surface Science and Engineering, 2012Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Lutfar Rahaman, Mohammad Asaduzzaman ChowdhuryAbstract:In the present study, variation of friction coefficient and wear rate with sliding speed is investigated experimentally when stainless steel 304 (SS 304) pin slides on different types of composite and polymer materials such as cloth reinforced ebonite (commercially known as gear fibre), glass fibre reinforced plastic (glass fibre), nylon and polytetrafluoroethylene (PTFE). To do so, a pin on disc apparatus is designed and fabricated. Experiments are carried out at sliding speed 1, 2, 3 m/s, normal load 15 N and relative humidity 70%. In general, friction coefficient and wear rate increase with the increase in sliding speed for all the tested materials. At identical conditions, the values of friction coefficient of nylon and wear rate of PTFE are highest among the tested materials. On the other hand, the lowest values of friction coefficient and wear rate are different for different materials depending on the sliding speed.
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effect of duration of rubbing and normal load on friction coefficient for polymer and composite materials
Industrial Lubrication and Tribology, 2011Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Asaduzzaman Chowdhury, Mohammad Lutfar RahamanAbstract:Purpose – The present paper seeks to report the effect of duration of rubbing on friction coefficient for different polymer and composite materials. Variations of friction coefficient and wear rate with the normal load are also investigated experimentally when stainless steel (SS 304) pin slides on different types of materials such as cloth‐reinforced ebonite (commercially known as gear fiber), glass fiber‐reinforced plastic (glass fiber), nylon and polytetrafluoroethylene (PTFE).Design/methodology/approach – A pin on disc apparatus is designed and fabricated. During experiment, the rpm of test samples was kept constant and relative humidity was 70 percent.Findings – Studies have shown that the values of friction coefficient depend on applied load and duration of rubbing. It is observed that the values of friction coefficient decrease with the increase of normal load for glass fiber, nylon and PTFE. Different trend is observed for gear fiber, i.e. coefficient of friction increases with the increase of nor...
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the effect of amplitude of vibration on the coefficient of friction for different materials
Tribology International, 2008Co-Authors: Mohammad Asaduzzaman Chowdhury, Maksud HelaliAbstract:Abstract This work examines how friction coefficients are affected by amplitude of normal vibration at different frequencies. Variation of friction coefficient with the amplitude of normal vibration is investigated experimentally when mild steel pin slides on different types of material such as glass fiber reinforced plastic, cloth reinforced ebonite, polytetrafluoroethylene (PTFE), rubber and mild steel. For this, a pin-on-disc apparatus having facility of vibrating the test samples at different amplitudes and frequencies of vibration was designed and fabricated. During the experiments, the effects of sliding velocity, roughness, normal load and duration of rubbing were also investigated. Studies have shown that the friction coefficient decreases with the increase of amplitude of vibration within the observed range. The observed ranges of amplitude of vibration were 10–200 μm. In this study, it is also observed that the rate of reduction of friction coefficient has a particular relationship on the amplitude and frequency of vibration. The experimental results are compared with those available in the literature and simple physical explanations are provided.
Helmlinge Aurélie - One of the best experts on this subject based on the ideXlab platform.
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Panyard, Morvant Ebonites (2)
HAL CCSD, 2011Co-Authors: Helmlinge AurélieAbstract:Morvant Ebonites panyard, Dos Santos Street, Morvan
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Panyard, Morvant Ebonites
HAL CCSD, 2011Co-Authors: Helmlinge AurélieAbstract:Morvant Ebonites panyard, Dos Santos Street, Morvan
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Panyard, Morvant Ebonites (3)
HAL CCSD, 2011Co-Authors: Helmlinge AurélieAbstract:Morvant Ebonites panyard, Dos Santos Street, Morvan
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Float, Morvant Ebonites
HAL CCSD, 2011Co-Authors: Helmlinge AurélieAbstract:Float, Morvant Ebonites panyard, Dos Santos Street, Morvan
Maksud Helali - One of the best experts on this subject based on the ideXlab platform.
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the effect of amplitude of vibration on the coefficient of friction for different materials
Tribology International, 2008Co-Authors: Mohammad Asaduzzaman Chowdhury, Maksud HelaliAbstract:Abstract This work examines how friction coefficients are affected by amplitude of normal vibration at different frequencies. Variation of friction coefficient with the amplitude of normal vibration is investigated experimentally when mild steel pin slides on different types of material such as glass fiber reinforced plastic, cloth reinforced ebonite, polytetrafluoroethylene (PTFE), rubber and mild steel. For this, a pin-on-disc apparatus having facility of vibrating the test samples at different amplitudes and frequencies of vibration was designed and fabricated. During the experiments, the effects of sliding velocity, roughness, normal load and duration of rubbing were also investigated. Studies have shown that the friction coefficient decreases with the increase of amplitude of vibration within the observed range. The observed ranges of amplitude of vibration were 10–200 μm. In this study, it is also observed that the rate of reduction of friction coefficient has a particular relationship on the amplitude and frequency of vibration. The experimental results are compared with those available in the literature and simple physical explanations are provided.
Dewan Muhammad Nuruzzaman - One of the best experts on this subject based on the ideXlab platform.
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friction coefficient of polymer and composite materials sliding against stainless steel
Advanced Materials Research, 2012Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Asaduzzaman ChowdhuryAbstract:An endeavor has been made to study and compare the friction coefficient of different polymer and composite materials. Experiments were carried out when stainless steel 304 (SS 304) pin slides on different types of composite and polymer materials such as cloth reinforced ebonite (commercially known as gear fiber), glass fiber reinforced plastic (glass fiber), nylon and polytetrafluoroethylene (PTFE). Experiments were conducted at normal load 5, 7.5, 10 N, sliding velocity 0.5, 0.75, 1 m/s and relative humidity 70%. Variations of friction coefficient with the duration of rubbing at different normal loads and sliding velocities were investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases with the increase in normal load and sliding velocity for all the tested materials except nylon. At identical operating conditions, the magnitudes of friction coefficient are different for different polymer and composite materials.
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friction coefficient and wear rate of polymer and composite materials at different sliding speeds
International Journal of Surface Science and Engineering, 2012Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Lutfar Rahaman, Mohammad Asaduzzaman ChowdhuryAbstract:In the present study, variation of friction coefficient and wear rate with sliding speed is investigated experimentally when stainless steel 304 (SS 304) pin slides on different types of composite and polymer materials such as cloth reinforced ebonite (commercially known as gear fibre), glass fibre reinforced plastic (glass fibre), nylon and polytetrafluoroethylene (PTFE). To do so, a pin on disc apparatus is designed and fabricated. Experiments are carried out at sliding speed 1, 2, 3 m/s, normal load 15 N and relative humidity 70%. In general, friction coefficient and wear rate increase with the increase in sliding speed for all the tested materials. At identical conditions, the values of friction coefficient of nylon and wear rate of PTFE are highest among the tested materials. On the other hand, the lowest values of friction coefficient and wear rate are different for different materials depending on the sliding speed.
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effect of duration of rubbing and normal load on friction coefficient for polymer and composite materials
Industrial Lubrication and Tribology, 2011Co-Authors: Dewan Muhammad Nuruzzaman, Mohammad Asaduzzaman Chowdhury, Mohammad Lutfar RahamanAbstract:Purpose – The present paper seeks to report the effect of duration of rubbing on friction coefficient for different polymer and composite materials. Variations of friction coefficient and wear rate with the normal load are also investigated experimentally when stainless steel (SS 304) pin slides on different types of materials such as cloth‐reinforced ebonite (commercially known as gear fiber), glass fiber‐reinforced plastic (glass fiber), nylon and polytetrafluoroethylene (PTFE).Design/methodology/approach – A pin on disc apparatus is designed and fabricated. During experiment, the rpm of test samples was kept constant and relative humidity was 70 percent.Findings – Studies have shown that the values of friction coefficient depend on applied load and duration of rubbing. It is observed that the values of friction coefficient decrease with the increase of normal load for glass fiber, nylon and PTFE. Different trend is observed for gear fiber, i.e. coefficient of friction increases with the increase of nor...