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Soft Computing Applications in Actuarial Sciences

Thesis Info

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Author

Jilani, Tahseen Ahmed

Program

PhD

Institute

University of Karachi

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2008

Thesis Completion Status

Completed

Subject

Computer Science

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/4605/1/3112H.pdf

Added

2021-02-17 19:49:13

Modified

2023-01-06 19:20:37

ARI ID

1676727835790

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حاجی اقبال احمد

حاجی اقبال احمد
افسوس ہے ۱۶،۱۷/اپریل کی درمیانی شب میں ہمارے علاقے اوردہلی کے مشہور ومعروف صاحب خیر حاجی اقبال احمد صاحب ۷۲ سال کی عمر میں رحلت فرما گئے۔ مرحوم۱۹۴۷ء کے انقلاب سے قبل پھاٹک حبش خاں میں انڈے،مرغی کی تجارت کرتے تھے۔انقلاب کے بعد جامع مسجد کے علاقے میں آگئے اوریہی کاروبار اورمچھلی کاکاروبار وسیع پیمانے پر کرنے لگے۔ ہرشہر میں بڑے بڑے تاجر ہوتے ہیں، حاجی صاحب بھی ایک بڑے کاروباری تھے لیکن ان کی غیر معمولی خصوصیت یہ تھی کہ اوّل درجے کے صاحب خیر تھے، امورخیر کی جستجو اور تلاش میں رہتے تھے اوراجتماعی اور ملی کاموں میں ذوق وشوق سے حصہ لیتے تھے، یہی وجہ ہے کہ دوردور تک ان کی شہرت تھی۔رمضان المبارک میں مدارس عربیہ کے سینکڑوں سفیر ان کے یہاں آتے تھے اورمرحوم بڑے حوصلے سے ان مدرسوں اور دینی درسگاہوں کی خدمت کرتے تھے۔ سفیروں کے ہجوم اورکثرت کی وجہ سے گزشتہ کئی سال سے یہ معمول بنالیا تھا کہ رمضان المبارک کی۲۱تاریخ سے زکاۃ کی تقسیم شروع کرتے تھے اورپھر آخر تک یہ سلسلہ قائم رہتا تھا۔مسجد مچھلی دالان میں چندہ لینے والوں کی لائنیں لگ جاتی تھیں اورحاجی صاحب صبر و برداشت بلکہ خندہ پیشانی سے ان سب کی مدد کرتے تھے، پتے لکھے ہوئے سینکڑوں منی آڈر فارم علیٰحدہ آتے تھے جو عید کے بعد روانہ کیے جاتے تھے۔ بیواؤں اورنادار شریف گھرانوں میں بیٹھی ہوئی نوجوان لڑکیوں کی شادیوں میں امداد کرناان کا محبوب مشغلہ تھا۔ ویران اوراُجڑی ہوئی مسجدوں کی تعمیر اورآبادی میں والہانہ انداز سے حصہ لیتے تھے، رنگ روڈپر شاہ بڑے کی حسین وجمیل اور وسیع مسجد ان کی حرارت ایمانی کی زبردست یادگار ہے۔ وزیراعظم کی سمادھیوں کے درمیان اس خوبصورت مسجد کے سبک میناروں کی عجیب شان نظرآتی ہے، انقلاب سے پہلے یہ مسجدزیادہ آباد نہیں تھی اب...

بلاد اسلاميہ ميں مندروں كى تعمير

There are rulings for both Muslims and non-Muslims in Islām whereby Muslims are bound to act and deal with the nonMuslims according to those teachings. There are numerous books authored in classical and modern times that include all such details of dealing with the different categories and of nonMuslims. It is therefore incumbent on Muslims to follow all such jurisprudential guidelines in all times and places. Although the application and employment methods of these legislations may vary in modern times but Islām has clearly stipulated its objectives and expectations that every Muslim pledges to fulfill in all times. In this paper, in stead of mentioning the jurisprudential details and discussions regarding building temples and religious places on non-Muslims in Muslim lands, only those verses of the Qur’ān and the Aḥādīth are mentioned that are basis for all such jurisprudential discussions. Numerous Qur’ānic verses and Prophetic traditions along with the consensus of companions and scholars are compiled in this paper to clarify the rightful stance in this regard.

Synthesis and Characterization of Lafe1-Xnixo3 X = 0. 0-0. 5 Using Synchrotron Radiations Xrd, Exafs, Xanes , Magnetization, Mossbauer and Impedance Spectroscopy

Thorough investigations regarding the effects of Ni doping on Fe site in LaFeO3 on the structural, electronic, ac electrical, dielectric and magnetic properties has been performed using synchrotron X-ray diffraction, X-ray absorption, dc magnetization, Mossbauer and impedance spectroscopy. Polycrystalline LaFe1-xNixO3 (x = 0.0, 0.1, 0.3 & 0.5) oxides were prepared by the solid state reactions method. The results and brief relevant theoretical introduction of each experimental technique are presented and discussed in a separate chapter. Chapter 1 encircles brief description of the importance of LaFe1-xNixO3, importance of the experimental techniques used for these characterizations, motivations and objectives of the present study. The synthesized samples are the orthorhombically distorted derivatives of an ideal perovskite structure. Anomalous variations in the perovskite distortions have been observed and attributed to the energy effects associated with partial filling of the degenerate orbitals and the hybridization of the localized orbitals at cations and anions, invoked by Ni doping in LaFeO3. To investigate the effects of Ni doping on the oxidation state, spin state and magnetic ordering of Fe cations in LaFO3, 57 Fe Mossbauer experiment (at room temperature) and dc magnetization measurements between 4K and 400K have been performed. The iron is present in high spin 3+ and 4+ oxidation states. Density of Fe4+ increases with Ni doping. Fe3+ cations in LaFeO3 are antiferromagnetically ordered. The weak ferromagnetic component in M-H curves is due to the canted spin structure of Fe cations in LaFeO3. Temperature independence of the saturation magnetization associated with this weak ferromagnetic component strongly suggests that the degree of spin canting is invariant with between 4K and 400K. A progressive collapse of the magnetically ordered state of Fe in LaFeO3 to a spin disordered state on Ni doping has been observed and discussed in terms of increase in the spin relaxation frequency and dilution of the Fe3+ sublattice (five unpaired spins: t2g3,eg2) by Fe4+ (four unpaired spins: t2g3,eg1) and low spin Ni2+/Ni3+ cations. The possibility of any transition of the Fe3+ from the high spin state to low spin state and hence its role to mediate this collapse in the magnetically ordered state has been totally excluded. Analysis of the Fe K-edge X-ray absorption spectra in the XANES and EXAFS regions confirmed the results of Mossbauer spectroscopy and XRD regarding oxidation state of Fe and octahedral deformations, respectively. Ni is found as Ni3+ in LaFe0.9Ni0.1O3 and the density of Ni2+ increases with further Ni doping. Temperature dependence of the position and strength of the ac electrical relaxations indicates that the electrical conduction and dielectric polarization in LaFe1-xNixO3 are due to the small polaronic hoping of the holes state between Fe4+ and Fe3+. The observed colossal value of the dielectric constant in LaFeO3 is an extrinsic effect and its origin lies in the extended defects at grain-grain and sample-electrode interfaces. Variations in the resistance and the capacitance associated with grain and grain boundaries has been conferred in terms of the density of the electrical charge carriers, potential barriers height at grain boundaries and thickness of the grain boundaries. O K-edge XANES spectra shows the growth of two new important conduction bands with doping Ni in LaFeO3. One is the localized conduction band „L‟, associated with the holes states introduced at the iron cations. The other band „m‟ is of itinerant nature and is due to the hybridization of O2p states with Ni3d states. From the increase in spectral intensity of „L‟ or the concentration of Fe4+ (hoping channel for the localized conduction), a progressive increase in the mobility and decrease in the activation energy for hoping of the localized electrical charge carriers was expected and observed. From the simultaneous growth of both of these bands, a competition between these two parallel conductions in LaFe1-xNixO3 can be predicted. Dominancy of either the itinerant or localized type conduction in any composition of LaFe1-xNixO3 is determined by the dominancy of these conduction bands. Metallic character in LaFe1-xNixO3 increased progressively with increasing Ni. This again was in accordance to the growing intensity of the delocalized conduction band „m‟. Although, the activation energy for hoping of holes between Fe4+ and Fe3+ decreased with the increase in Ni doping, however, localized type conductivity associated with the iron lattice remained non-zero even in half doped sample „LaFe0.5Ni0.5O3‟. It indicated that the holes introduced into the iron cations were localized and the itinerant behavior of the electrical charge carriers associated with the iron cations have not completely established. The composition dependent metal to insulator transition in LaFe1-xNixO3 is associated dominantly with the metallic character at the Ni sites rather than the new holes state at the Fe cations.