Broadband horn antennae are presented that efficiently couple terahertz radiation between sub-wavelength metal-metal waveguides and free space. Sub-picosecond terahertz pulses were coupled into and out from sub-wavelength parallel-plate waveguides by using the horn antennae in a terahertz time-domain spectrometer. Monolithic antennae were fabricated at the facets of metal-metal terahertz quantu...

Geopolymer paste is an innovative construction material which shall be produced by chemical action of inorganic molecules. It is a more environmentally friendly alternative to conventional Portland cement which is abundantly available worldwide. In this study, the influence of different alkaline activators (Na and K) on the mechanical and thermal behaviors of metakaolin-based geopolymer was inv...

A special sensitive element based on the novel composite material was created. The sensor has a linear calibration and is resistant to aliphatic hydrocarbons, in particular aviation fuel. A low cost and easy-to-implement method for calibrating the sensor was proposed. Temperature dependence of the oxygen mass transfer coefficient kL was measured for aviation fuel TS-1 (Russi...

This paper describes a polynomially-solvable subproblem of temporal planning. Polynomiality follows from two assumptions. Firstly, by supposing that each sub-goal fluent can be established by at most one action, we can quickly determine which actions are necessary in any plan. Secondly, the monotonicity of sub-goal fluents allows us to express planning as an instance of STP. Our class includes ...

The neurotoxicity of nitrous oxide (N<sub>2</sub>O) is known to be mainly occurred by interference with action vitamin B12. A 38-year-old male presented progressive gait instability after recreational inhalational use N<sub>2</sub>O for 2 months. Although spine magnetic resonance image showed typical subacute combined degeneration, nerve conduction study motor neuropathy...

OBJECTIVE Myocardial cellular electrophysiology and intracellular Ca2+ regulation are altered in heart failure. The extent of these changes may vary within the layers of the ventricular wall. To examine this, cell size, action potential and intracellular Ca2+ transient characteristics (Fura-2) were measured in single cardiac myocytes from sub-epicardial, mid-myocardial, and sub-endocardial regi...

A sub-class of action systems has recently been shown to model the behaviour of asynchronous delay-insensitive circuits. Hence, the action systems formalism can be used to design such circuits. The set of action systems belonging to this subclass is, however, rather limited and therefore it might be difficult to find such a system directly. In this paper we introduce a design method for delay-i...

Laser action has been demonstrated in chalcogenide glass microsphere. A sub millimeter neodymium-doped gallium lanthanum sulphide glass sphere was pumped at 808 nm with a laser diode and single and multimode laser action demonstrated at wavelengths between 1075 and 1086 nm. The gallium lanthanum sulphide family of glass offer higher thermal stability compared to other chalcogenide glasses, and ...