Accurate and timely information of crop area and its production plays an important role to summarize the upcoming situation of market supply and demand. It also provides the foundation to policy makers, stakeholders, government planners and agribusiness community for ideal management of their interests. Remote sensing provides the information about discrete time instant event over a larger area while crop models explain continuous crop growth status on daily basis as function of weather, soil and management. This study was planned with the objective to estimate the area under wheat (Triticum aestivum L.) cultivation in Faisalabad district using satellite data and estimate its grain yield by assimilating the remotely sensed information into the CERES-Wheat model under spatiotemporal heterogenous conditions and variable management practices. Before applying the crop model at regional scale, it was calibrated using a field experimental data. In this experiment, three wheat cultivars (Punjab-2011, Aas-2011 and Galaxy-2013) were grown under six levels of deficit irrigation. The experiment was conducted with three replications under strip plot arrangement. Results of experiment proved that stem elongation stage is the least sensitive to drought, and grain formation stage of wheat crop is more sensitive to drought as compared to booting and stem elongation stages. Same grain yield can be achieved by applying 75% of irrigation compared to farmer irrigation practice. Wheat cultivars Punjab-2011 and Galaxy-2013 produced significantly more grain yield than wheat cultivar Aas-2011 and both cultivars are statistically at par to each other. CERES-Wheat model was calibrated and validated using data of field experiment to simulate the crop growth parameters and soil water balance. Model performed very well and simulated results were close to the observed data. Landsat based temporal satellite images were used to estimate the area under wheat cultivation and water index of crop during the crop growth period. Green (G), red (R), near infrared (NIR), shortwave infrared 1 (SWIR1) and shortwave infrared 2 (SWIR2) bands, and NDVI and NDWI indices of both satellites landsat7 and landsat8 were used to develop the metrics (minimum, 10, 25, 50, 75, 90, maximum and mean). Median NDWI derived from landsat based temporal images were used to quantify the applied volume of irrigation in wheat cultivated area of Faisalabad district. Calibrated crop model was used to simulate the wheat growth and estimate the wheat yield. Estimated wheat yield by crop model is 5% lower than the estimate of Crop Reporting Service (CRS), Punjab. It shows that assimilation of remotely sensed information into a crop model can be used to estimate the wheat productivity with good accuracy.
مولانا مسعود علی ندوی افسوس ہے گزشتہ ماہ اگست کی۲۷ کومولانا مسعود علی صاحب ندوی اسّی (۸۰) برس کی عمر میں کئی سال کی علالت و ازکار رفتگی کے بعد رہ گزائے عالم جادوانی ہوگئے۔مرحوم ندوۃ العلما کے فارغ التحصیل اورمولانا شبلی کے تلامذہ میں سے تھے۔دارالمصنفین اعظم گڑھ جو آج ایشیا کاعظیم الشان اسلامیات کاادارہ ہے اُس کے علمی سربراہ اورروح رواں اگر مولانا سید سیلمان ندوی تھے توتنظیمی اور تعمیری حیثیت سے مرحوم اس کے میرکارواں تھے۔ قدرت نے انھیں انتظامی صلاحیتیں اعلیٰ درجہ کی بخشی تھیں اورانھوں نے ان صلاحیتوں کودارالمصنفین کے لیے وقف کردیا تھا۔چنانچہ ادارہ کی مطبوعات کی اعلیٰ کتابت وطباعت، اُس کی شاندار اورخوشنما تعمیرات اورکاروباری حیثیت سے اُس کاخودکفیل ہونا، یہ سب مرحوم کی کوششوں اورحسن سلیقہ وانتظام کانتیجہ ہے۔یوں بھی بڑے خوش مزاج، مہمان نوازاور موقع شناس انسان تھے۔ملک کے مشہور ہندومسلم زعماسے ان کے گہرے تعلقات تھے۔ ادھر چند برسوں سے مسلسل علالت کے باعث عضو معطل سے ہوگئے تھے۔ لیکن جب تک دارالمصنفین قائم ہے اُن کانام زندہ اورروشن رہے گا۔ اﷲ تعالیٰ انھیں مغفرت وبخشش کی نعمتوں سے سرفراز فرمائے۔ [اکتوبر۱۹۶۷ء ]
Islam is the complete code of life. The Prophet (PBUH) and his companions made every effort to safeguard it. They handed it over in fully preserved form without any flaw to their true followers. However, adversaries of Islam have been trying to find faults with safety of Quran and the life of Prophet (PBUH). Orientalists are among them. Orientalists are those non-Muslim scholars, who do their research about Muslim’s beliefs, culture and values. Their purpose is to double edge. First to create doubts in the minds of Muslims regarding their religion. Secondly to marsh hated in the hearts and minds of non-believers. This is why these prejudiced scholars criticize Quran and the personal life of Prophet (PBUH). In the following discussion we have analyzed these objections in detail regarding the safeguard of the Holy Quran during the time of Muhammad (PBUH).
Saeed Ehsan Awan, PhD, Department of Physics & Applied Mathematics, PIEAS, June 2012. "Kinetic Simulation, Sensitivity Analysis of Fission Product Activity and Source Term Evaluation for Typical Accident Scenarios in Nuclear Reactors”; Supervisor: Dr. Nasir. M. Mirza; Co-Supervisor: Dr. Sikander M. Mirza; Department of Physics & Applied Mathematics, PIEAS, Nilore 45650, Islamabad. With growing demands of safe and reliable energy resources worldwide, nuclear power plants present viable option. A two third majority of these plants are PWRs. In comparison with their competitors, PWRs suffer from significantly higher dose rate due to radioactivity in the primary circuit which is dominantly contributed by corrosion and followed by fission products leakage from fuel. There has been extensive investigation in developing corrosion resistance alloys. But the problem of corrosion product activity in primary circuit has aggravated in view of trend towards high burn-ups, high temperatures, and longer-life time reactors. Under this scenario, the significance of fission products releases becomes even higher. The fission product activity (FPA) is considered to be the second leading contributor towards prevalent radiation levels in Pressurized Water Reactors (PWRs). The elevated radiation level results in delay and prolongation of routine repair/maintenance tasks of reactor’s cooling system, which not only reduces its effectiveness but also results in several million dollars revenue loss per power plant annually. However the reliable estimates of fission product activity (FPA) are also significant for the evaluation of fuel performance, assessment of radiological consequences in case of any accident releasing radioactivity and scheduling repair/maintenance tasks. The detailed knowledge about radioactivity build up and sensitivity analysis of fission product activity (FPA) is essential for reducing the plant maintenance time, which also helps to reduce the dose for plant operators and general public. In this work, first a model is developed for dynamic and static sensitivity analysis of fission product activity in primary coolant of typical pressurized water reactor (PWR). It has been implemented in the FPCART based computer program FPCART-SA that carries out sensitivity analysis of fission product activity (FPA) using both static as well as dynamic approaches. For long steady power operation of reactor, the computed values of normalized static sensitivity have been compared with the corresponding values obtained by using the dynamic sensitivity analysis. The normalized sensitivity values for the reactor power (P), failed fuel fraction (D), Coolant leakage rate (L), total mass of coolant (m) and the let down flow rate (Q) have been calculated and the values: 1.0, 0.857, -2.0177 × 10-6, 2.349 × 10-4, -2.329 × 10-4 have been found correspondingly for Kr-88 with the dominant values of fission product activity (FPA) as 0.273 μCi/g. In the second part of this study, evaluation of time dependence of source term has been carried out for a typical reactor system. The modeling and simulation of release of radioactivity has been carried out by developing a computer program FPARA which uses the ORIGEN2 code as subroutine, for core inventory calculations. Time dependent release of fission product activity to the containment and air has been simulated for loss of coolant accident scenarios. For noble gases, iodine and for aerosols, the release rate studies have been carried out for different leakage rates from containment. Effects of fraction of source in the coolant that is directly available after the accident on volumetric fission product activity were studied. Results show that volumetric activity in the containment air for different fission products remains strong function of decay constants, leakage rates, retention factors, deposition rates and fractional release rates.