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حاجی شیخ رشید احمد

آہ! حاجی شیخ رشید احمد صاحب مرحوم
۱۹۵۲ء جس کو ’’عام الحزن‘‘کہنا چاہیے اس کی ابتدا بردار مکرم مولانا یعقوب الرحمن عثمانی کی وفات کے سانحۂ المناک سے ہوئی اورانتہا حضرت مولانا مفتی محمد کفایت اﷲ قدس سرہ کے حادثۂ ارتحال پر، اسی سال برادر عزیز مولانا سعید احمد کے والد ماجد قبلہ ڈاکٹر ابرار حسین صاحب، محب باصفا حافظ ضیاء الدین صاحب مدیر ندائے حرم، قرول باغ کے غمگسار پڑوسی چودھری محمد بخش صاحب اور بچپن کے بے تکلف ساتھی قاری محمد طاہر صاحب ناظم دارالصنائع دارالعلوم دیوبند رخصت ہوئے، یہاں تک کہ ۲دسمبر کی درمیانی شب میں مخدومی حاجی شیخ رشید احمد صاحب کی بھی رحلت کاحادثہ پیش آگیا۔
حاجی صاحب سے میرے اورمیرے بزرگوں کے تعلقات نہایت ہی قدیم اورنہایت ہی مخلصانہ تھے، کم وبیش۴۵سال سے شرفِ نیاز حاصل تھا، مسرت وغم کے ہرموقع پرایک دوسرے کے شریک رہتے تھے۔
ابھی کل کی سی بات معلوم ہوتی ہے جب مارچ۱۹۱۸ء میں بزرگان میرٹھ کایہ قافلہ بڑے اہتمام وشوق سے میرے نکاح میں شریک ہونے کے لیے دیوبند آیا تھا۔اسی کایہ اثر ہواکہ ۳۵ سال کے بعد جب گذشتہ۲۹/۲۸نومبر کوبرخوردار مجیب الرحمن کی تقریب شادی ہوئی تواس وقت جوبزرگ خاص طورپر یاد آئے اورجن کے شریک نہ ہونے کاقلب پرخاص اثر ہوااُن میں ایک حاجی صاحب مرحوم ومغفور بھی تھے، انسان کی بے خبری وبے بسی کابھی کیاعالم ہے اور اس دنیا کی عجوبہ کاریوں کا بھی کیاٹھکانا ہے کہ ہم دیوبند میں تقریب کے انتظامات میں لگے ہوئے تھے اورحاجی صاحب مرحوم ملاء اعلیٰ کے لیے رخت سفر باندھ رہے تھے۔ ’’فیالِلْاَسف‘‘
مرحوم شروع میں الہٰی بخش اینڈ کمپنی میرٹھ میں ایک ملازم کی حیثیت سے آئے تھے پھر اپنی غیر معمولی قابلیت،محنت اوردیانت شعاری کی بدولت جلد ہی کمپنی کے شریکِ منفعت ہوگئے اور پھرچند سال کے بعدایک باوفا اورباوقار شریک کی حیثیت...

سائنس اور تہذیب و تمدن کے فروغ میں اسلام کا کردار

Islam is a complete code of life. It has complete instructions regarding all aspects of life. There is no moment in human life when the wisdom of Islam has not benefited humanity. Likewise there is no such area in the world where Islam has not put the light of guidance. Allah Almighty has systematically administered this world system.  Allah created the universe and set it disciplined, then created man and gave him every kind of physical, rational, logical and argumintive ability, so that humans can know the secrets of the universe by thinking and understanding it. The journey of research and discovery, which started long ago, is still continues today after passing through different stages of research. This journey of research resulted in evolution of philosophy, civilization, promotion of new scientific innovations and discoveries. The research and discovery resulted in the secrets of heaven and earth.  Today, man stands at the stage of science and technology, about which the human being in the older days even could not imagine of it. In this entire evolutionary journey, the religion of Islam is the only religion that not only stood firmly with humans, but guided him at every step during this evolutionary journey. In this context, the Quranic teachings are comprehensive matter. Allamah Sayyuti says "There is no knowledge and problem that is not discussed in the Qur'an. So Islam invites human to research in the system of the universe and presents the system of universe for its authenticity.

Structure, Coordination, Sensing and Allocation in Cognitive Radio Vanets

With the increase in population, vehicle traffic has also increased on roads. This has caused an increase in accidents, due to which thousands of people lose their lives and millions get injured annually. Hence, a foolproof and secure Vehicular Ad-hoc Network (VANET) structure is required to reduce the number of accidents considerably. Pre-danger information must be communicated in real-time, in order to implement preventive measures to avoid accidents. VANETs are specially designed in order to communicate information about hazards. The protocol DSRC/WAVE/IEEE802.11p is proposed for VANETs, but it may not be enough to cope with increasing network traffic, especially emergency messages. Hence the use of cognitive Radio (CR) technology has been introduced. A lot of methods for coordination and channel allocation in the context of VANETs are being introduced. As such, the need of a framework to reliably compare the relative performances of different channel sensing, allocation and coordination schemes which take into account the movement of vehicles is felt. Different techniques like Independent Spectrum sensing and various forms of Cooperative techniques have been proposed in the near past. In this dissertation, a VANET structure has been proposed for highways and urban environments. In the Highway model, separate Road Side Units have been provided for the traffic on each side. In this way group formation for localized traffic will be easy on highways. Simulation results show that by using the proposed model, average throughput and end-to-end delay have improved considerably, while packet loss has also been reduced. We also propose an efficient spectrum sensing mechanism for sensing and sharing the CR spectrum by mobile vehicles, which combines best of stand-alone sensing and cooperative sensing techniques. The proposed mechanism not only improves the probability of correct detection, but also almost eliminates the probability of misdetection. Then we have introduced a framework that can be used to define and compare such schemes in a variety of scenarios. Simulation results clearly show the robustness of our technique by almost eliminating the misdetections and reducing to a great extent the false alarms. Afterwards we have proposed a sensing technique which prepares a database for small road segments, time slots for the hours of the day and different frequencies of the spectrum based on the sensing of vehicles throughout the day. Based on this database, the future utilization of the spectrum is proposed. Simulations and results clearly indicate the success and usefulness of our proposed technique. In the end we have proposed a model based on fuzzy logic for the allocation of different types of TV channels having different ON/OFF timings in different hours of the day taking time, vehicle speed, message priority and CR channel sensing results as input. The simulations performed show the utilization of every type of channel in speed versus time and message priority versus time. These results can be utilized well for the allocation patterns of CR channels.
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