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Former President Donald Trump signed tax overhaul legislation in 2017 that opened the refuge to leasing from oil companies. [ABSTRACT FROM AUTHOR]

This paper describes a 2.4-GHz digitally-modulated class-D polar power amplifier (PA) with novel circuit techniques to enhance the average power-added efficiency (PAEave) that becomes increasingly crucial to prolong the battery lifetime. The PA features 5+5-b interactive AM-AM modulation between the class-D unit amplifiers and a novel high resolution dynamic matching network (DMN) to improve the back-off PAE. A novel power-gating technique tailored for class-D PAs is also proposed and embedded into each unit amplifier and its driver (tapped inverter chain), alleviating leakage-current suppression, area reduction of the DMN, and direct-powering by a standard 1.5-V AA battery. An high back-off power efficiency is made possible by introducing a multi-bit capacitively-tuned DMN, which adds low loss while improving the PAE of the unit amplifiers using the load-pull optimization. The DMN also can correct the antenna impedance mismatch for better average Pout (Pout,ave) and PAEave under a practical VSWR (2.5:1), and aids to reconfigure the PA between the Pout-optimized and the PAE-optimized modes. For a 20-MHz 64-QAM OFDM output at a typical EVM (< −25 dB), the 65-nm CMOS PA exhibits 40.7% PAEave at a 16.3-dBm Pout. The mode switching is demonstrated as a prospective function for battery lifetime extension. [ABSTRACT FROM AUTHOR]

Abstract: In a previous paper [1] it was discussed the viability of functional analysis using as a basis a couple of generic functions, and hence vectorial decomposition. Here we complete the paradigm exploiting one of the analysis methodologies developed there, but applied to phase coordinates, so needing only one function as a basis. It will be shown that, thanks to the novel iterative analysis, any function satisfying a rather loose requisite is ontologically a basis. This in turn generalizes the polar version of the Fourier theorem to an ample class of nonorthogonal bases. The main advantage of this generalization is that it inherits some of the properties of the original Fourier theorem. As a result the new transform has a wide range of applications and some remarkable consequences. The new tool will be compared with wavelets and frames. Examples of analysis and reconstruction of functions using the developed algorithms and generic bases will be given. Some of the properties, and applications that can promptly benefit from the theory, will be discussed. The implementation of a matched filter for noise suppression will be used as an example of the potential of the theory. [Copyright &y& Elsevier]

Abstract: The generation of synthetic signals has been one of the first applications of computers. As a matter of fact the earliest electronic computers were analog and their output was, in effect, a signal. With the advent of digital electronic the initial method employed has been the application of the Fourier Theorem, generating signals as series of sinusoids, a technique deserving a name by its own: “additive synthesis”. The advantage of the technique is the great control on the parameters of the generated wave. The main disadvantage is the complexity of the computation involved, namely for each component many samples of sinusoid need to be computed, and this usually requires a special hardware to be performed in real time. The reason is that the sine wave, although being natural for physical linear systems, is very complex in the digital domain. This article introduces an effective generalization of the polar flavor of the Fourier Theorem based on a new method of analysis. Under the premises of the new theory an ample class of functions become viable as bases, with the further advantage of using the same basis for analysis and reconstruction. In fact other tools, like the wavelets, admit specially built nonorthogonal bases but require different bases for analysis and reconstruction (biorthogonal and dual bases) and vectorial coordinates; this renders those systems unintuitive and computing intensive. As an example of the advantages of the new generalization of the Fourier Theorem, this paper introduces a novel method for the synthesis that is based on frequency-phase series of square waves (the equivalent of the polar Fourier Theorem but for nonorthogonal bases). The resulting synthesizer is very efficient needing only few components, frugal in terms of computing needs, and viable for many applications. [Copyright &y& Elsevier]

The article reports on a study which analyzed data gathered on returned Australian Antarctic personnel to determine the relationships between personality traits, perceptions of subjective fit with Antarctic station life and culture, and perceptions of Antarctic station culture. Findings indicated that those be considered the culture as satisfaction-oriented reported better fit, less role conflict, and increased satisfaction with their group membership.

Two companies that have operated in the same 'heart-healthy' software and equipment market for nearly a decade have opted for marriage. Polar Electro of Woodbury, said it acquired HealthFirst Corp., [...]

Woodbury-based Polar Electro Group has acquired HealthFirst Corp., an Albuquerque, N.M.-based developer of complete software and Web-based products used in health and fitness assessment, risk appraisal and education, as well [...]

Norilsk Nickel has halted production at Nickel Plant, part of its Polar nickel-cobalt operation, two months ahead of schedule, bringing its cobalt ingot production to an end, the company has confirmed. [ABSTRACT FROM AUTHOR]

Country's largest brewery is slowing production [ABSTRACT FROM PUBLISHER]