Classical masking aperture methods are found to be mostly inaccurate to determine the terahertz beam size in terahertz time-domain spectroscopy (TDS) experiments, owing to complex diffraction effects. Here, we present a simple and reliable method for measuring beam waists in terahertz TDS. It is based on the successive diffraction by an opaque disk followed by a small circular aperture.

The terahertz time-domain spectroscopy (THz-TDS) imaging system can obtain high-dimensional signals of the substance fingerprint information. It is necessary to process properly to use some signal processing techniques especially for high dimensional signals. As a mathematical description language, geometric algebra (GA) provides not only a powerful algebraic framework for the multi-dimensional...

Truth Diagrams, TDs, are a new diagrammatic notation for propositional logic. TDs provide: (1) representations of logical states of affairs and relations; (2) operators on such relations; (3) a test of the validity of derivations. A proof of one of de Morgan’s laws is given as an illustration of TDs. Truth Diagrams (TDs) were invented as part of a programme of research on the Representational E...

Erectile dysfunction (ED) and testosterone deficiency syndrome (TDS) are closely related. In addition to affecting men's sexual health, both conditions also affect other male health issues. Screening for ED, especially in younger men, should become standard clinical practice for the primary care physician. Possible systemic effects and associated effects of TDS are now well documented. Test...

The algorithm for two-player game-tree search has a notorious reputation as being a challenging algorithm for achieving reasonable parallel performance. MTD(f), a new variant, has become the sequential algorithm of choice for practitioners. Unfortunately, MTD(f) inherits most of the parallel obstacles of , as well as creating new performance hurdles. Transposition-table-driven scheduling (TDS) ...

Buprenorphine is a potent semisynthetic opioid analgesic that is widely used to treat moderate to severe pain. Since 2001, it has been available in several European countries in a transdermal delivery system (TDS), and it was approved for use in the United States in 2010. We report 3 cases of allergic contact dermatitis caused by a TDS containing buprenorphine, as verified by a positive patch t...

The time domain synchronous orthogonal frequency division multiplex (TDS-OFDM) modulation scheme has recently been proposed in a new digital television (DTV) system. The European DTV standard DVB-T, on the other hand, uses the cyclic prefix (CP) OFDM modulation. In this paper, TDS-OFDM and CP-OFDM for nonergodic broadcast inter-symbol-interference channels are compared from an information theor...