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

Effects of linear array antenna parameters to the performance of LMS beamforming algorithms

Attenuation time series were collected to study the rain induced scintillation during September 2011 -- August 2012 from MEASAT3 satellite operating at Ku-band. In this paper, scintillation statistics are analyzed in rainy condition extracted manually from 188 rainy events. The scintillation distributions are represented scintillation intensity and amplitude by monthly, seasonal, worst-month and annual distributions. Probability density function (PDF) of scintillation intensity correspondingly agrees to Generalize Extreme Value (GEV) fit. In addition, model validation to the measured data is also provided.

Rain Induced Scintillation Measurement on Satellite Link in Tropical Climate

An analytical approach is carried out to evaluate the impact group velocity dispersion (GVD) on the bit error rate performance of a wavelength division multiplexed optical network. The results show that the performance of the system is highly degraded in presence of fiber dispersion and presence of dispersion imposes severe restrictions on the number of nodes and the node spacing.

Effect of group velocity dispersion on a WDM optical ring network

A field experiment was conducted to evaluate the effect of sunflower plant extract on weed control and productivity of wheat. Dried and fresh sunflower plant extracts (SPE) were applied @ 5 t ha-1 and 10 t ha-1 at pre- and post-emergence of weeds in wheat plots. In addition, weed free, manual weeding and unweeded control treatments were also imposed in the experiment. A pplication of fresh SPE @ 10 t ha-1 at post-emergence contributed to the highest weed control efficiency, next to manual weed control treatment throughout the crop growing period. This treatment showed the highest weed control efficiency of 49.71% and 53.41% at 45 and 60 days after sowing, respectively. Application of fresh SPE @ 5 t ha-1 at post-emergence was found to be beneficial on the growth and development of wheat compared to other treatments. Apart from weed free and unweeded situations, the highest grain yield of 3.91 t ha-1 was recorded in the treatment receiving fresh SPE @ 5 t ha-1 applied at post-emergence. The study further suggested that the application of fresh sunflower plant extract @ 5 ha-1 during post-emergence might be considered as a viable alternative to traditional weed management practices under subtropical environment.

/pdf/allelopathic-potential-of-sunflower-extract-on-weed-control-1l70kng77s.pdf

Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

Energy harvesting network (EHN) is a trending topic among the recent researches. This substantial attention is due to the limitations, operational cost and risks of the conventional power suppliers, such as fossil fuel and batteries. Moreover, EHN are expected to enhance energy efficiency by harvesting energy of RF and renewable sources. In contemporary research works, EHN is applied to CR technology. This energy harvesting cognitive radio network (EHCRN) is expected to utilize both energy and electromagnetic spectrum efficiently. However, EH-CRN is facing enormous 
challenges related to technical design. Some of these challenges are reviewed in recent surveys. However, other challenges such as optimizing the network throughput and EH-CRN implementation models were not the focus of these researches. 
Therefore, the aim of this survey is to review EH-CRN research works by focusing the survey perspective on maximizing 
the network throughput and the implementation models.

Md. Rafiqul Islam

Papers

Effects of linear array antenna parameters to the performance of LMS beamforming algorithms

Rain Induced Scintillation Measurement on Satellite Link in Tropical Climate

Effect of group velocity dispersion on a WDM optical ring network

Allelopathic Potential of Sunflower Extract on Weed Control and Wheat Yield Under Subtropical Conditions

Survey on energy harvesting cognitive radio networks