مسٹر آرتہر ہیورڈ
لندن کے امپرئیل کالج آف سائنس میں مسٹر آرتہر ہیورڈ سائنس سے متعلق ایک تجربہ کرتے کرتے وفات پاگئے، وہ کچھ عرصہ سے فن تصویر کشی (فوٹوگرافی) سے متعلق تجربات میں مشغول تھے، اور آخری تجربہ ایک تاریک کمرہ کے اندر کررہے تھے، کمرہ میں روشنی کا کسی۔۔۔۔ ان سے گذر نہ تھا، اور اس کی چھت اور دیواریں سیاہ رنگ سے رنگی ہوئی تھیں، کمرہ اندر سے بند تھا، کہ وفعتہ زور سے ایک تڑاقا ہوا، مسٹر موصوف کے استاد پروفیسر بون باہر تھے، وہ یہ آواز سن کر دوڑے کمرہ کے اندر انھوں نے جھانکا تو معلوم ہوا بجلی کی روشنی ہورہی ہے، ایک ہتھوڑا لے کر انہوں نے دروازہ توڑا اور اندر گئے تو دیکھا کہ مسٹر ہیورڈ خون میں شرابور پڑے ہوئے ہیں اور دیکھتے ہی دیکھتے ختم ہوگئے، پروفیسر بون کی رائے میں جس آلہ سے وہ تجربہ کررہے تھے، اتفاقاً پھٹ گیا اور اس کے اندر جو زہریلی گیس تھی، اس کے صدمہ سے ان کی گردن سخت مجروح ہوئی اور یہی باعث ہلاکت ہوا۔ (فروری ۱۹۲۱ء)
Human beings have been created in proportion and perfection by the Creator, as He is Just and Fair and likes justice and fairness in making and implementing laws. Justice is the key on every level from individual to State and interstate for peaceful and smooth functioning. Justice holds universal acceptance from the laws of nature to the creation of beings, while injustice leads to chaos. It causes the decline and disgrace among civilized societies. The chaos and terrorism in contemporary world is all because of injustices by individuals and by the States. The teachings of the messangers of Allah were to create the justice and equality at every level in the society. Deviation from the teachings of Allah and His messangers with respect to justice is a way towards destruction. Any nation that forgoes justice becomes victim of injustice itself and the consequences are ultimate anarchy and chaos. Islam as a universal religion demands the justice in every sphere of life. Islam and its teachings are for peace and prosperity. It promulgates and promotes human dignity and the value of Justice, equality and peace. Today the Ummah is in desperate need of adopting and practicing justice and fairness as the Creator has shown in His Word and Work.
The objective of this study is to investigate linear and nonlinear propagation of kinetic Alfven waves (KAWs) and coupled kinetic Alfven-acoustic (CKAA) waves in non Maxwellian plasmas. Theoretical frame works that employed Maxwellian, kappa and Cairns distributions could not explain observations of flat top and spiky distributions. Generalized (?, ?) distribution function encompasses both low energy and high energy parts of the observed velocity distributions and provides good quantitative fits of the observed data. KAWs has been observed to play an important role in acceleration and heating of plasma particles in space and laboratory plasmas. The study is carried out by using two-potential theory and solitary structures are obtained by applying Sagdeev potential approach. A comprehensive study has been carried out to ascertain how the formation of compressive and rarefactive solitary structures of KAWs and CKAA waves depend on the low and high energy parts of the electron distribution function. It has been shown that out results agree well with Fast and Freja observations of the nonlinear KAWs. An important feature of our study is the formation of rarefactive solitary structures. The analysis of compressive and rarefactive solitary structures of CKAA waves reveals that flat top at low energies of the electron distribution are responsible for the formation of compressive solitary structures whereas the spikes at low energies allow the formation of both compressive and rarefactive solitary structures. We have extended our investigations of CKAA waves for electron-positron-ion (e-p-i) plasmas, particularly highlighting the role of nonthermal electrons and positrons following generalized (?, ?) distribution. The significance of this study is to emphasize the existence of density dip solitons for spiky distribution at low energy. The relevance of the study presented in this thesis with reference to astrophysical, space and laboratory plasmas has also been discussed.