There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

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Electronic Transport In Mesoscopic Systems

Time-Frequency Analysis.

Antenna Theory And Design

The nephrotic syndrome

Integrated Plant Nutrient Systems with Fertilizer Deep Placement Increase Yields and Nitrogen Use Efficiency of Rice Under Different Irrigation Regimes

The present work introduced a framework to investigate the effectiveness of proton boron fusion therapy (PBFT) at the cellular level. The framework consisted of a cell array generator program coupled with PHITS Monte Carlo package with a dedicated terminal-based code editor that was developed in this work. The framework enabled users to model large cell arrays with normal, all boron, and random boron filled cytoplasm, to investigate the underlying mechanism of PBFT. It was found that alpha particles and neutrons could be produced in absence of boron mainly because of nuclear reaction induced by proton interaction with 16O, 12C and 14N nuclei. The effectiveness of PBFT is highly dependent on the incident proton energy, source size, cell array size, buffer medium thickness layer, concentration and distribution of boron in the cell array. To quantitatively assess the effectiveness of PBFT, of the total energy deposition by alpha particle for different cases were determined. The number of alpha particle hits in cell cytoplasm and nucleus for normal and 100 ppm boron were determined. The obtained results and the developed tools would be useful for future development of PBFT to objectively determine the effectiveness of this treatment modality. 

/pdf/on-the-effectiveness-of-proton-boron-fusion-therapy-pbft-at-1u3jblfl.pdf

On the effectiveness of proton boron fusion therapy (PBFT) at cellular level

In this paper, a theoretical analysis is presented to evaluate the influence of polarization mode dispersion (PMD) on the bit error rate (BER) performance of direct sequence optical code division multiple access system. In this analysis, intensity modulation direct detection technique is employed in single mode fiber operating at 1550nm, and optical orthogonal codes are used as address sequence. Optoelectronic conversion is performed by an avalanche photodiode in an optical correlator receiver. The system BER performance is determined on account of receiver, optical amplifier, and multiuser access interference noises. The power penalty suffered by the system is evaluated at BER of 10−9 as a function of number of simultaneous users, chip rates, and PMD co-efficient. The system performance is found to degrade more at higher chip rate, and longer fiber length due to the PMD.

Influence of polarization mode dispersion on the BER performance of DS-OCDMA

This paper presents an optical wavelength division multiplexed (WDM) cross-connect (OXC) topology, which is the modified form of the existing topologies. The analytical approach for the proposed topology is derived to explore the effect of crosstalk induced in multichannel WDM network due to OXC. The factors that affect the magnitude of crosstalk in the OXC are investigated and identified. The bit error rate (BER) performance of a WDM optical system is evaluated at a bit rate of 10 Gb/s on account of OXC-induced crosstalk and different noises. Power penalty is evaluated at BER of 10-9 shows that there is a significant impact of crosstalk on the number of wavelengths and input fibers. The results obtained from the present study demonstrate that the crosstalk performance of the proposed topology can be improved significantly than the existing topologies.

Crosstalk and bit error rate performance of a proposed optical cross-connect topology

In this paper, the InxGa1-xN based multi junction solar cell under concentrator has been designed theoretically and the performances are evaluated The consequence of increasing the concentration ratio up to 500 suns and the number of junctions up to 8 are predicted A relative comparison of efficiency with and without concentrator has also been studied The efficiency of InxGa1-xN-based single junction, triple junction, and eight junction solar cells without employing concentrator were found to be 2467, 3757, and 4615% respectively, while those using concentrator have been improved to 4107, 4692 and 5041% respectively

Md. Rafiqul Islam

Papers

Integrated Plant Nutrient Systems with Fertilizer Deep Placement Increase Yields and Nitrogen Use Efficiency of Rice Under Different Irrigation Regimes

On the effectiveness of proton boron fusion therapy (PBFT) at cellular level

Influence of polarization mode dispersion on the BER performance of DS-OCDMA

Crosstalk and bit error rate performance of a proposed optical cross-connect topology

In x Ga 1-x N based multi junction concentrator solar cell