حکیم حافظ خواجہ شمس الدین لکھنوی
افسوس ہے کہ گذشتہ مہینہ دو ممتاز اہل علم نے وفات پائی، حکیم حافظ خواجہ شمس الدین لکھنوی اور سید اختر علی صاحب تلہری، حکیم صاحب تنہا حاذق طبیب ہی نہیں تھے، بلکہ عربی زبان اور اسلامی علوم کے فاضل بھی تھے اور شعر و ادب کا بڑا ستھرا ذوق رکھتے تھے طب یونانی کے تو ماہر ہی تھے، اور اب لکھنؤ میں اس کی عظمت انہی کے دم سے قائم تھی، طب کی کتابوں کا درس بھی دیتے تھے جن کے پڑھانے والے اب کم رہ گئے ہیں، آداب و اخلاق میں لکھنؤ کی پرانی تہذیب اور وضعداری کا نمونہ تھے، لکھنؤ کے متعدد قومی ملی اداروں کے رکن تھے اور ان کے کاموں میں بڑی دلچسپی سے حصہ لیتے تھے، ندوہ سے خاص تعلق تھا، اور اس کی مجلس منتظمہ کے جلسوں میں بڑی پابندی سے شریک ہوتے تھے، مولانا عبدالباریؒ فرنگی محل کے شاگرد بھی تھے اور مرید بھی، اس تعلق سے ان سے بہت پرانی شناسائی تھی آخر میں تصوف کی طرف زیادہ رجحان ہوگیا تھا، اب طب یونانی کے ماہر اٹھتے جارہے ہیں، طبی درسگاہوں سے طبیب کے بجائے ’’ڈاکٹر‘‘ پیدا ہونے لگے ہیں اور خالص فن طب ختم ہوتا جاتا ہے، مرحوم لکھنؤ میں اس کی آخری یادگار تھے، ان کی موت سے فن طب اور پرانی تہذیب و شرافت کی ایک بڑی یادگار مٹ گئی۔ اﷲ تعالیٰ ان کی مغفرت فرمائے۔ (شاہ معین الدین ندوی،مئی ۱۹۷۱ء)
Stress corrosion cracking (SCC) refers to the damage of mechanical components which are under the combined action of static load and corrosive environment. This phenomenon occurs in various applications including naval and aerospace industry where aluminum and steel alloys experience mechanical loadings in the presence of corrosive environments. In this research work, microstructural and environmental influence on corrosion behavior of Al-6061-T6 at different static loads was investigated. A new test fixture was developed for stress corrosion cracking. Dog-bone shaped tensile specimens of Al-6061-T6 were manufactured using CNC milling machine. Tests were conducted at constant loads of 200 N, 500 N and 800 N, in three different environments: dry ambient conditions, distilled water and 3.5% NaCl solution. Testing continued for different intervals of time i.e. 96 hours, 68 hours and 4.5 hours respectively. After each set of experiments, specimens were observed for cracks using metallurgical microscope. Detailed fractographic investigation of all the tested specimens was carried out using Scanning Electron Microscope (SEM). Excessive corrosion and material degradation was observed in specimens tested in distilled water and 3.5% NaCl environments.
Microstructural analysis depicted pitting corrosion and crack deformation. Some regions clearly showed that grain boundaries were attacked due to oxidation and chemical attack causing weakening of grain boundaries and resulted into intergranular corrosion. Precipitates and grain boundaries in Al-6061-T6 served as a reason of crack initiation due to hydrogen diffusion. Fractographic investigation provided the evidence of trans granular fracture as well as intergranular fracture which was observed as dimples and extensive ductile tearing.
Government of Pakistan has launched various illiteracy reduction plans from time to time to promote literacy rate in the country but these plans could not achieve the targets. This study was designed to appraise these illiteracy reduction plans and to design a low cost model to improve literacy rate in Pakistan. The main objectives of the study were: to appraise the illiteracy reduction plans introduced in Pakistan, from time to time, to identify the needs and problems of the direct affectees (all the illiterates above the age of 10 years), to know the ground realities regarding implementation of illiteracy reduction plans/projects at Government and NGOs level and to design a low cost model to improve the literacy rate in Pakistan. The population of the study was comprised of Educationists i.e. Ph.D. degree holders in Education, Executives working in the top level management in policy formation, plan designing, project development and program development, Executives working in National Planning Commission, Provincial Secretary, Additional Secretary, Deputy Secretary and EDOs (Education and literacy), Literacy teachers, Heads of different NGOs, Community representatives and Direct beneficiaries (the brick makers, manual workers, laborers, peasants etc). Snowball sampling technique was used to find the most relevant persons (respondents) for different illiteracy reduction programmes in different areas for the conduct of this research study. viA mixed-method research design was used i.e. data was quantitative and qualitative. For quantitative data a questionnaire was developed at five point rating scale ranging from ‘1’ indicating strongly disagree to ‘5’ indicating strongly agree; a selection of ‘3’ indicating uncertain/don’t know. For qualitative data some open ended questions were included in the questionnaire. An interview schedule was also developed for Head of NGOs, community representatives and direct beneficiaries. Data collection was started from the person who had been involved for long with the illiteracy eradication programmes. On his identification the other respondent was selected. Overall 1200 questionnaires were sent to the respondents but 998 questionnaires were got back. In this way, data was collected from 1348 (998 questionnaires and 350 interviews) respondents. Main findings of the study showed that need assessment was not carried out before launching illiteracy reduction programs, objectives of the illiteracy reduction programmes were not relevant to the literacy needs of the participants, local community was not involved in the running the literacy centers, religious leaders, intellectuals and retired personnel were not invited to support the illiteracy eradication programmes, and political instability in the country was a hurdle in the achievement of the targets of the illiteracy eradication programmes. In the light of the findings of the study, a low cost model was designed to improve the literacy rate in Pakistan. The proposed model was presented to 10 experts in the discipline of education for its validation. The model was improved in the light of experts’ opinion. They were satisfied that this low cost model will be useful for increasing the literacy rate in Pakistan.