The inertia of trapping and detrapping nonequilibrium charge carriers affects the electrochemical transport properties both bulk nanoscopic structures in a very peculiar way. An emerging memory response with hysteresis current–voltage its eventual multiple crossing, produced by this universally available ingredient, are signatures process. Here, we deliver microscopic analytical solution for th...

This study examined the training needs of agricultural extension agents in Delta State, Nigeria. A sample of 102 respondents was drawn from extension agents in the States’ Agricultural Development Programme (ADP), Ministry of Agriculture and Natural Resources (MANR) and the FADAMA Programme. Data were collected in February 2017 by using a structured and validated questionnaire. Data generated w...

Soft constraints are gaining popularity in diverse areas such as orchestration of Web services or optimization of scheduling decisions. However, current approaches to soft constraints preclude them from modelling certain decision problems with multiple preference criteria. We propose a new approach to soft constraints which allows a natural expression of these problems, describe an implementati...

We propose fast optical frequency-hop code division multiple access (FH-CDMA) for high bandwidth local area networks. Encoding and decoding are achieved by tunable fiber Bragg gratings. Frequency hopping offers many advantages compared to the previously proposed optical CDMA multiple access techniques. The simultaneous utilization of the time and frequency domains offers notable flexibility in ...

Spectral precoding is a promising technique to suppress out-of-band emissions and comply with leakage constraints over adjacent frequency channels mask requirements on the unwanted emissions. However, spectral may distort original data vector, which formally expressed as error vector magnitude (EVM) between precoded vectors. Notably, EVM has deleterious impact performance of multiple-input mult...

Multi-component signals contain multiple signal parts expressed in the same physical modality. One way to identify individual components is if they are produced by different physical mechanisms. Here, I studied the mechanisms generating acoustic signals in the courtship displays of the Calliope hummingbird Stellula calliope. Display dives consisted of three synchronized sound elements, a high-f...

In a typical wireless telecommunication network, large number of communication links is established with limited available frequencies. The problem that addresses assigning frequencies to transmitters such interference avoided as far possible called the frequency assignment problem. usually modeled graph coloring (labeling) We study in this paper ( s , t )-relaxed L (2, 1)-labeling which consid...

a finite element analysis is presented for sloshing and impulsive motion of liquid-filled conical tanks during lateral anti-symmetric excitation. the performed analyses led to the development of a number of charts which can be used to identify the natural frequency, the mode shapes of conical tanks for both fundamental and the cos(θ)-modes of vibration. conical tank geometry was described with ...