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

Thank you very much for reading electronic transport in mesoscopic systems. Maybe you have knowledge that, people have look numerous times for their favorite readings like this electronic transport in mesoscopic systems, but end up in harmful downloads. Rather than reading a good book with a cup of tea in the afternoon, instead they juggled with some harmful bugs inside their computer. electronic transport in mesoscopic systems is available in our book collection an online access to it is set as public so you can get it instantly. Our book servers spans in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the electronic transport in mesoscopic systems is universally compatible with any devices to read.

Electronic Transport In Mesoscopic Systems

Time-Frequency Analysis.

Antenna Theory And Design

The nephrotic syndrome

Power system is a large distributed system with large number of instruments and machines which require continuous adjustment between each part for a proper and efficient performance. This continuous adjustment is done by a combination of Controllers, Stabilizers, Regulators, etc. This paper presents a design of decentralized controller based on neural network (NN) for multi-generator power system. NNs are used here to sense dynamic fault and reduce its effect by adjusting the weights considering current circumstances. This controller deals with dynamic faults of a large decentralized power system occurred from load changes. The controller is trained by previous values of voltage, frequency and power but controller's inputs are instantaneous system signals. This ensures the dynamic and overall system stability. Simulation studies with IEEE-14 bus power system are used to display the virtue of the proposed controller designs.

Design and performance analysis of neural network based dynamic stability controller for multi-generator power system

A power divider plays a significant function in antenna’s feeding network. Many types of power divider exist yet there are only a few existing studies of Wilkinson power dividers at high frequencies (28 GHz) for 5G communications systems. This paper presents a tapered 2-way Wilkinson power divider that operates in Malaysia's 5G wireless communication band (28 GHz). CST microwave studio is used to design, simulate, and optimize the tapered 2-way Wilkinson divider. The simulation results show resonance around 23.5-37.9 GHz. The operating frequency of 28 GHz resulted in power division with a 3.2 dB insertion loss and has an isolation of 19.21 dB. The design can be made wideband with equal power division at each output port by adding an extra resistor along the tapered line to reduce output return loss and isolation, as demonstrated in this paper.

Design of Wilkinson power divider at 28 GHz for 5G applications

Satellite services in Malaysia open the doors to contemporary telephone and data transmission facilities whilst at the same time foster and strengthen the union between its peninsula and the Borneo continent. Satellite communications also contribute significantly to the quick growth of computer networking in Malaysia, as well as providing the new high definition (HD) direct-to-home (DTH) satellite television services. Satellite systems with operating frequencies of Ku-band and higher have been extensively used for Earth-space communications in the temperate climate countries for decades. The same cannot be said for tropical region. One of the likely limiting factors is the absence of accurate rain fade information. Satellite engineers and designers have to establish the required fade margin to overcome rain attenuation; which need to be incorporated into the system in the effort to accomplish the preferred link performance. This is also applied in the case of the recently launched the Malaysian MEASAT-3B satellite. With this in mind, a comprehensive set of previously acquired signal measurements can certainly shed lights on the propagation characteristics to be endured. In this paper, the probable fade margins are proposed. They are based on deductions and estimations of 1 year (2009) local radar-derived rainfall rate data and the latest ITU-R rain attenuation prediction model.

Estimations of Fade Margin for the New Malaysian MEASAT-3B Ku-Band Link

A bandpass tunable RF filter is proposed by using Radio Frequency (RF) Microelectro Mechanical Systems (MEMS). The tenability is obtained by using capacitive MEMS switches. The performance of the filter depends on geometry and location and types of the MEMS switches. The paper described the optimization procedure to design a bandpass filter that can be tuned within the bandwidth of 3.6 GHz to 4.4 GHz by using high frequency electromagnetic simulator (HFSS).

RF bandpass tunable filter using RF MEMS

Abiotic stress, especially salt stress, is one of the major barriers to crop production worldwide. Crops like onion that belong to the glycophytic group are more sensitive to salinity stress. A huge study regarding the influence of salinity stress on the growth and development of crops has already been done and is still ongoing. One of the major targets of the research is to develop genotypes that have enhanced performance under stress environments. The world needs more of these types of genotypes to combat the ever-growing salt-stressed soils. Therefore, a number of germplasm were studied during the 2019–2020 and 2020–2021 seasons under different salt concentrations to identify tolerant genotypes as well as to study the plants’ responses at different growth stages against elevated salinity levels. A 2-year study was conducted where germination potential was evaluated in the first year and carried out in petri dish culture of seeds, followed by plastic pot culture for plant establishment and bulb development evaluation during the second year. Four different saline water solutions having different salt concentrations (0, 8, 10, and 12 dS m−1) were applied to the petri dishes and pots as the source of water for plants in both seasons. Results indicated that a significant reduction in plants’ performance occurs under higher salinity levels. Salt concentration had an adverse impact on germination, leaf development and growth, the height of plants, bulb size and shape, and the bulb weight of onion. All the growth phases of onion are sensitive to elevated concentrations. Variable performances were observed in the genotypes under stress conditions, and a few genotypes (Ac Bog 409, Ac Bog 414, Ac Bog 424, Ac Bog 430, Ac Bog 417, Ac Bog 419, Ac Bog 420, Ac Bog 422, and Ac Bog 425) having some sort of tolerance to salt stress were identified, which might be recommended for mass production. Tolerance indices could successfully be applied in selecting the salt-tolerant genotypes. Thus, the present findings and the identified genotypes could be further utilized in salt stress improvement research on onion.

/pdf/performance-valuation-of-onion-allium-cepa-l-genotypes-under-1pe0q3e6.pdf

Performance valuation of onion (Allium cepa L.) genotypes under different levels of salinity for the development of cultivars suitable for saline regions

Md. Rafiqul Islam

Papers

Design and performance analysis of neural network based dynamic stability controller for multi-generator power system

Design of Wilkinson power divider at 28 GHz for 5G applications

Estimations of Fade Margin for the New Malaysian MEASAT-3B Ku-Band Link

RF bandpass tunable filter using RF MEMS

Performance valuation of onion (Allium cepa L.) genotypes under different levels of salinity for the development of cultivars suitable for saline regions