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Linear and Non Linear Drift Modes in Multicomponent in Homogeneous Plasmas

Thesis Info

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Author

Sajad Ali

Program

PhD

Institute

Abdul Wali Khan University

City

Mardan

Province

KPK

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11149/1/Sajad%20Ali_Phy_AWKU_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726583824

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In the recent decades the physics of multi component plasmas has grown up tremendously. There is hardly any situation in which plasma could be found in simple case consisting of positively charged ion and negatively charged electron only, even if we take an example of electron ion plasma consisting of ionized hydrogen atoms and their detached electrons, In tokomak fusion plasma. The plasma confined is not simple rather than it is contaminated with detached particles of the inner surface of confinement, this makes the parameters very much complex. Up to certain time the concept of multicomponent plasma was mostlyrevolving around the concept three particles, plasma ,but with the discovery of Klein concept of metagalaxy , a new class of four component multi component plasma was discovered which set a new mile stone regarding thecreation of our universe. Now keeping in view the importance, of the multi component plasma the following thesis consists of the following work First non-uniform quantum magneto plasma consisting of electron positron ion plasma is explored for Electrostatic Rayleigh-Taylor (ERT) instability. The quantum corrections effects (including Bohm potential and few other parameters) alongside the magnetic field effects on instability mode are also explored. The dispersion relation which is obtained in shape of cubic form is further examined for Different roots of the real along with imaginary root of the RT mode. The obtained dispersion relation along with the growth rates associated with the RT mode are further examined on the analytical, numerical bases. This work is proved to be of great physical importance on the studies of both laboratory as well as to study the magnetized astrophysical entities e,g white dwarfs. 2ndly Electrostatic Gravitational instability is investigated in inhomogeneous pair-ion-electron quantum magneto plasma under drift wave approximation, which consists of positive and negative ions with a electrons. The presence of negative ions with their different streaming velocities turns the dispersion relation into cubic dispersion relation obtained is the instability. It is further shown RT instability varies for magnetic field density. The drift wave instability was also investigated for four component AMBI plasma both in linear and as well as non linear regimes, following derivation of linear dispersion relation, along with kdv burger equation for evaluation of both shock wave and solitons.
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ڈ اکٹر تارا چند

ڈاکٹر تارا چند
گذشتہ اکتوبر میں ڈاکٹر تاراچند کے انتقال پر ملال سے بھی ہندوستان میں ایک بڑا علمی خلاء پیدا ہوگیا، وہ الہ آباد کے کایستھ پاٹ شالہ کی مدرسی اور پرنسپلی کے بعد الہ آباد یونیورسٹی کے وائس چانسلر بھی ہوئے، پھر حکومت ہند کے تعلیمی مشیر بنے، ایران میں ہندوستان کی طرف سے سفیر بناکر بھیجے گئے، وہاں سے واپسی پر پارلیمنٹ کے رکن نامزد کئے گئے لیکن ان کی اصلی شہرت اور مقبولیت ایک بلند پایہ مورخ کی حیثیت سے ہوئی، انھوں نے ’’انفلوانس آف اسلام ان انڈین کلچر‘‘ پر ایک مقالہ لکھ کر آکسفورڈ سے ڈاکٹریٹ کی ڈگری حاصل کی، یہ ان کی ابتدائی تحقیقی کوشش تھی، لیکن اس سے بہتر کتاب اس موضوع پر اب تک نہیں نکلی، آخر میں وہ ہسٹری آف دی فریڈم موومنٹ کے بورڈ کے اڈیٹر تھے، ان کی ادارت میں یہ کام بڑی خوش اسلوبی سے انجام پاتا رہا، ان کی تحقیقی تحریروں میں دیدہ دری کے ساتھ بڑی فراخدلی بھی ہوتی، وہ ہندی اردو کی حسین آمیزش یعنی ہندوستانی زبان کے بھی بڑے موئد تھے، اس کے کچھ اچھے نمونے بھی لکھ کر پیش کرتے رہے، ان کی نیک نامی اور مورخانہ بصیرت کی وجہ سے ان کی خوشگوار یادوں کا چراغ علمی حلقہ میں برابر روشن رہے گا۔ (’’ص ، ع‘‘، نومبر ۱۹۷۳ء)

Welcome Note from Editor-in-Chief

It is with great pleasure that I write this editorial to welcome you to the first issue of this new International journal, “Pakistan Biomedical Journal” (PBMJ). The topics covered by the journal are certainly broad and interesting. Biomedical science is a collection of applied sciences that help us understand, research, and innovate within the field of healthcare. It includes disciplines like molecular biology, clinical virology, bioinformatics, and biomedical engineering, among others. It's designed to apply the biological sciences to advance not only individual health but also the area of public health. Biomedical Research can help health professions better understand things like the human body and cell biology, making advances in our understanding of epidemics, health initiatives, and human health in the age of longer life expectancy. It aids our understanding of infectious disease and provides research opportunities into some of our most troubling health issues. The journal will continue to publish high quality clinical and biomedical research in health and disease later in life. Peer review will remain a vital component of our assessment of submitted articles.I am very happy to have a team of excellent editors and editorial board members from the top international league covering in depth the related topics. They will ensure the highest standards of quality for the published manuscripts and, at the same time, keep the process time as short as possible. We hope to bring best researches in the field of biomedical sciences that may serve as a guideline in health awareness, understanding the mechanisms and its management in future.   We definitely look forward to receiving your excellent studies to making PBMJ synonymous with high quality in the biomedical science domain.

Robust Algorithm for Genome Sequence Short Read Error Correction Using Hadoop-Mapreduce

Biological sequences consist of A C G and T in a DNA structure and contain vital information of living organisms. The development of computing technologies, especially NGS technologies have increased genomic data at a rapid rate. The increase in genomic data presents significant research challenges in bioinformatics, such as sequence alignment, short-reads error correction, phylogenetic inference, etc. Next-generation high-throughput sequencing technologies have opened new and thought-provoking research opportunities. In particular, Next-generation sequencers produce a massive amount of short-reads data in a single run. However, these large amounts of short-reads data produced are highly susceptible to errors, as compared to shotgun sequencing. Therefore, there is a peremptory demand to design fast and more accurate statistical and computational tools to analyze these data. This research presents a novel and robust algorithm called HaShRECA for genome sequence short reads error correction. The developed algorithm is based on a probabilistic model that analyzes the potential errors in reads and utilizes the Hadoop-MapReduce framework to speed up the computation processes. Experimental results show that HaShRECA is more accurate, as well as time and space efficient as compared to previous algorithms.