Cairo University

MTPR Journal


Physics of the Human Brain and its History

U+1F5132020-07-01 & doi:
Raghda Elraaie M. Amin

Brain has been the most mysterious puzzling organ in biology, due to its functional and structural complexity, its unavailable components for direct observation of interactions, mechanisms, and operations at work. Despite the immense hard work of many researchers and doctors, there are many issues about the brain which are still uncovered and many different contents undiscovered. The methodology of learning about brain itself is quite handicapped, (which will be explained further in this journal) still very slow & insufficient, which implies the interference of Modern Science and Technology to deal with this critical situation by Brain Modelling using Electronics and Programming. In this article, our main concern is the brain, where Physics plays an instrumental role in understanding the brain with its numerous functions, unravelling its structure, diagnosing and treating diseases, when it's common to hear people saying that the CPU is the computer's brain, there are so many affinities between them, more than just the processor, we can make a model of the brain using a computer having a specific design to mimic the brain's environment and features.



Super-Continuum femtosecond Laser generation

U+1F5132020-01-20 & doi:
Walid Tawfik

A novel methodology to produce a high-power femtosecond using supercontinuum generation in hollow-fiber has been developed. In this work, femtosecond high energy laser pulses have been observed. These pulses were generated due to supercontinuum caused by self –phase modification (SPM) in neon gas filled in a one-meter hollow-fiber followed by two chirped-mirrors for dispersion compensation. The created pulses reached high energy of sub-mJ at 1 KHz repetition rate. The characterization of femtosecond pulses in the regime of few-cycle pulses is considered using spectral phase interferometry for direct electric-field reconstruction (SPIDER). The SPIDER was used to observe precise measurements of pulse duration. The spectral bandwidth found to reach ultra-wide range from 600 – 950 nm. It has been found that the output pulse width is affected by the pulse duration of the injected femtosecond pulses into the optical fiber under different gas pressures. The observed results revealed that the nonlinear SPM increases with the gas pressure. The obtained pulses can be used to control the produced femtosecond laser characterization in future.