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Seismic Refraction Studies to Map Bed-Rock in Sai Area Gilgit for Sai Hydel Power Project

Thesis Info

Author

Sher Ali

Department

Deptt. of Earth Sciences, QAU.

Program

MSc

Institute

Quaid-i-Azam University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

1996

Thesis Completion Status

Completed

Page

24

Subject

Earth Sciences

Language

English

Other

Call No: DISS/M.Sc ES/153

Added

2021-02-17 19:49:13

Modified

2023-01-06 19:20:37

ARI ID

1676718797927

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سید اختر علی تلہری

سید اختر علی تلہری
سید اختر علی صاحب فن شاعر اور نکتہ سنج ادیب تھے، اردو اور فارسی زبان و ادب پر استادانہ نظر تھی، عربی اور انگریزی سے بھی واقف تھے، ساری عمر درس و تدریس اور تالیف و تصنیف میں گذری، ان کے تلامذہ کا دائرہ بہت وسیع ہے ان کی تربیت نے بہت سے شاعر و ادیب پیدا کردیے، ان کا کلام اور مضامین رسالوں میں نکلتے رہتے تھے، معارف میں بھی ان کی غزلیں شائع ہوتی تھیں، عرصہ ہوا معارف میں ہندوستان کے عربی شعرا پر ایک مبسوط مضمون شائع ہوا تھا، اتفاق سے اس میں کسی شیعہ شاعر کا ذکر نہ تھا، تلہری صاحب نے مجھ کو شکایت کا خط لکھا میں نے جواب دیا کہ اس میں میرا قصور نہیں ہے مضمون جس شکل میں آیا تھا میں نے شائع کردیا، اگر آپ شیعہ شعرا پر لکھ بھیجیں تو اس کو بھی شائع کردیا جائے گا، چنانچہ یہ مضمون انھوں نے لکھ کر بھیجا اور وہ شائع ہوا، مضامین کے علاوہ مستقل علمی و ادبی تصانیف بھی ان کی یاد گار ہیں، آج کل شاعروں اور ادیبوں کی کمی نہیں، ان کی تعداد روز افزوں ہے اس سے نظم و نثر دونوں کا دامن بہت وسیع ہوگیا ہے لیکن فنی مہارت اور علمی و ادبی بصیرت مفقود ہوتی جاتی ہے۔ تلہری مرحوم کی وفات سے ایک صاحبِ علم و ادب اور صاحبِ فن شاعر اٹھ گیا۔ اﷲ تعالیٰ ان کی مغفرت فرمائے۔ (شاہ معین الدین ندوی، مئی ۱۹۷۱ء)

Contact Tracing: A Forgotten Tool?

Contact tracing is done to interrupt the spread or transmission of the causative agent to others who are in close contact with the index case and are vulnerable by not being immune. Public health experts have relied on contact tracing to reduce the spread of infections throughout history. Now the same method is being used for COVID 19. The healthcare systems in developing countries are ill-equipped to respond to pandemics of this kind. Our healthcare facility effectively employed the traditional contact tracing tool that formed the basis of a strong support system for all those employees who contracted Corona virus infection.

Magneto-Optical Properties of Topological Insulators and Kondo Effects in Quantum Dots

This thesis has two parts, based on work carried out during my PhD. The first part comprises discussion of magneto-optical properties of ultra thin films of topological insulators (TI) with broken inversion symmetry. We explore the magneto-optical properties of thin film topological insulators (TFTI). Topological insulators are materials with insulating bulk and symmetry protected gapless surface states. In the TIs we consider, spin-Orbit Interaction (SOI) inverts valence and conduction bands and gapless surface states appear as the bulk gap closes at the interface of a topological insulator with conventional insulator. We study the magneto-optical response of ultrathin films of topological insulators in the presence of an external magnetic field with hybridization and broken inversion symmetry. We find that inversion symmetry breaking results in Landau level crossings and opening of additional optical transition channels. Inversion symmetry can be broken due to interaction with a substrate or electrical gating. A phase transition from normal to topological insulating phase occurs by tuning system parameters with measureable signatures in static (dc) and dynamic (optical) conductivity. Moreover, we find that the optical Hall conductivity plateaus remain robust against a significant range of disorder strength. In the second part we discuss Kondo effect in a complex Quantum Dot (QD) in the presence SOI and analyze its influence on fixed points and Kondo temperature. We model a quantum dot (QD) in the Coulomb blockade regime with two localized orbitals connected to two external leads with SOI in the leads. The lead electrons couple to the dot state in different angular momentum modes in the presence of SOI. We develop an effective Hamiltonian for the system and study the multiparameter RG flows by renormalization group analysis in the weak coupling regime. Previous studies have shown that in the absence of SOI for odd electrons in the dot SU(4) and SU(2) Kondo fixed points are stable and for even electrons a universal stable fixed point exists. We determine the fixed points in the presence of SOI. We determine the Kondo temperature by numerically solving the RG equations and show that the Kondo temperature is enhanced by the SOI.