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Temperature programmed desorption (TPD) is the method of observing desorbed molecules from a surface when the surface temperature is increased. When experiments are performed using well-defined surfaces of single-crystalline samples in a continuously pumped ultra-high vacuum (UHV) chamber, then this experimental technique is often also referred to as thermal desorption spectroscopy or thermal ...
In physics, terahertz time-domain spectroscopy ( THz-TDS) is a spectroscopic technique in which the properties of matter are probed with short pulses of terahertz radiation. The generation and detection scheme is sensitive to the sample's effect on both the amplitude and the phase of the terahertz radiation. Fourier transform of the above pulse.
Type ASHRAE number IUPAC chemical name Molecular formula CAS no/ blend name Atmospheric lifetime (years) Semi-empirical ODP (R-11 = 1) Net GWP 100-yr (R-744 = 1)
One of the fundamental thermodynamic equations is the description of thermodynamic work in analogy to mechanical work, or weight lifted through an elevation against gravity, as defined in 1824 by French physicist Sadi Carnot. Carnot used the phrase motive power for work. In the footnotes to his famous On the Motive Power of Fire, he states ...
The fundamental theorems of asset pricing (also: of arbitrage, of finance ), in both financial economics and mathematical finance, provide necessary and sufficient conditions for a market to be arbitrage-free, and for a market to be complete. An arbitrage opportunity is a way of making money with no initial investment without any possibility of ...
The value of life is an economic value used to quantify the benefit of avoiding a fatality. [1] It is also referred to as the cost of life, value of preventing a fatality ( VPF ), implied cost of averting a fatality ( ICAF ), and value of a statistical life ( VSL ). In social and political sciences, it is the marginal cost of death prevention ...
TDS = k e EC. where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1000 g of ...
Business portal. v. t. e. In marketing, customer lifetime value ( CLV or often CLTV ), lifetime customer value ( LCV ), or life-time value ( LTV) is a prognostication of the net profit contributed to the whole future relationship with a customer. The prediction model can have varying levels of sophistication and accuracy, ranging from a crude ...