Browsing by Author "Hamid Mahmood"

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    Dyeing of fabric using biodegradable salts or dyeing without using any salt
    (UMT, Lhr, 2018) Hamid Mahmood
    The presented research work deals with pad steam method used for the dyeing of cotton fabric using different biodegradable salts i.e. Potassium Acetate, Tri-sodium Citrate. Continuous dyeing method used in this research work and results produced as compared to conventional inorganic salt (sodium sulphate) which is being used in the industry for the dyeing of cotton by reactive dyes. Different test methods (color fastness to laundering, color fastness to water and perspiration, color fastness to light and crocking) were performed to compare the results between conventional salt (sodium sulphate) and biodegradable salts (Potassium Acetate and Tri-sodium Citrate). All the results exhibited that biodegradable salts showed excellent results as compared to inorganic salts, resulted a continuous dyeing of cotton fabric by eco-friendly biodegradable salts. Nylon/Cotton blended fabrics are mostly dyed by two bath or one bath two step dyeing techniques. This research focuses on dyeing of nylon/cotton blend in one bath dyeing method by using one dye without salt and any other auxiliaries. In this research fabric was treated with 3-chloro-2-hydroxypropyl tri methyl ammonium chloride to modify cotton part of blend to make it positively charged.
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    Smart security lock
    (UMT Lahore, 2013) Shuaib Zafar; Hamid Mahmood; Ansar Ali
    In our project we will design a smart security lock. When the user flash out the ID card in front of the barcode reader, barcode reader read the barcode and sends it to microcontroller. From microcontroller barcode is send to main server through RF. In main server barcode is match which with the main excel file and if verified then massage is send back to microcontroller through RF to send the security password. The microcontroller displays the massage on LCD and asks the user to enter the password on num pad. When the user enters the password, microcontroller sends it to the main server again through RF to verify the password. If the password the password is verified then server sends the message to microcontroller to open the lock. If the password is wrong then the server sends massage to microcontroller to ring the bell. When the microcontroller receives the yes massage the lock is open. This security lock provides efficient and foolproof security to the building.