mohd junaid | University of Azad Jammu & Kashmir, Pakistan (original) (raw)
Address: Srinagar, Kashmir, India
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Journal of Vascular Surgery, 2010
Methods: One hundred seventy-eight patients (108 men, median age 70 years) with femoropopliteal l... more Methods: One hundred seventy-eight patients (108 men, median age 70 years) with femoropopliteal lesions suitable for angioplasty were recruited. Assessments were performed prior to and at 1, 3, 6, and 12 months following intervention (angioplasty and/or supervised exercise program). Clinical indicators of lower limb ischemia (treadmill walking distances, ankle pressures), generic (SF36, EuroQol), and disease-specific (Kings College VascuQol) quality of life questionnaires were analyzed. Correlation analysis was performed for index scores (SF-6D, EQ-5D, VascuQol) and individual domain scores using nonparametric tests.
This study compares the performance of CVD coated tungsten-carbide tools having an intermediate A... more This study compares the performance of CVD coated tungsten-carbide tools having an intermediate Al 2 O 3 layer to low content PCBN tools in hard turning of D2 tool steel (52 HRC). Results revealed that the coated carbide tool can outperform PCBN in machining the selected workpiece material within a certain range of cutting speeds (cutting temperature range). This is associated with tribo-film formation on the coated carbide tool surface. SEM and EDS were used to study the the wear patterns of the used cutting tools. The tribo-films were investigated using X-ray photoelectron method (XPS). The cutting temperature was measured using tool-workpiece thermocouple technique. The formation of the tribo-films was found to be highly-dependent on the cutting temperature and friction kinetics control at the tool-chip interface. Lubricious Cr-O tribo-films formed on the surface of the coated carbide tool, improving tool life at cutting speeds up to 100 m/min, which relates to an average toolchip interface temperature up to 930 0 C.
Journal of Vascular Surgery, 2010
Methods: One hundred seventy-eight patients (108 men, median age 70 years) with femoropopliteal l... more Methods: One hundred seventy-eight patients (108 men, median age 70 years) with femoropopliteal lesions suitable for angioplasty were recruited. Assessments were performed prior to and at 1, 3, 6, and 12 months following intervention (angioplasty and/or supervised exercise program). Clinical indicators of lower limb ischemia (treadmill walking distances, ankle pressures), generic (SF36, EuroQol), and disease-specific (Kings College VascuQol) quality of life questionnaires were analyzed. Correlation analysis was performed for index scores (SF-6D, EQ-5D, VascuQol) and individual domain scores using nonparametric tests.
This study compares the performance of CVD coated tungsten-carbide tools having an intermediate A... more This study compares the performance of CVD coated tungsten-carbide tools having an intermediate Al 2 O 3 layer to low content PCBN tools in hard turning of D2 tool steel (52 HRC). Results revealed that the coated carbide tool can outperform PCBN in machining the selected workpiece material within a certain range of cutting speeds (cutting temperature range). This is associated with tribo-film formation on the coated carbide tool surface. SEM and EDS were used to study the the wear patterns of the used cutting tools. The tribo-films were investigated using X-ray photoelectron method (XPS). The cutting temperature was measured using tool-workpiece thermocouple technique. The formation of the tribo-films was found to be highly-dependent on the cutting temperature and friction kinetics control at the tool-chip interface. Lubricious Cr-O tribo-films formed on the surface of the coated carbide tool, improving tool life at cutting speeds up to 100 m/min, which relates to an average toolchip interface temperature up to 930 0 C.