Webre·frac·to·ry (rĭ-frăk′tə-rē) adj. 1. Showing or characterized by obstinate resistance to authority or control: refractory children; refractory behavior. 2. Difficult to melt or work; … WebThe power of planting with a purpose. When a person planting a tree is motivated by meaning, the tree itself can become unstoppable. The ground is undisturbed. Maybe it’s in a forest, in a city park, or in your front yard. The moment is quiet. But the air is charged. It’s fueled by the energy of an impending change and the promise of a new ...
Did you know?
Web2 hours ago · By learning Jewish history on Broadway, audiences are paradoxically able to distance themselves from it, simply by knowing too much. In the final scene of “Leopoldstadt,” Leo, the character ... Webrefractory: 1 adj stubbornly resistant to authority or control “a refractory child” Synonyms: fractious , recalcitrant disobedient not obeying or complying with commands of those in authority adj not responding to treatment “a refractory case of acne” Synonyms: stubborn intractable not tractable; difficult to manage or mold adj temporarily ...
Webrefractory in American English (rɪˈfræktəri ) adjective 1. hard to manage; stubborn; obstinate said of a person or animal 2. resistant to heat; hard to melt or work said of ores or metals 3. a. not yielding to treatment, as a disease b. able … WebA typical refractory will be capable of maintaining a temperature drop of 1000 °C or more between its hot and cold faces. The shell temperature needs to be maintained below around 350 °C to protect the steel from …
WebThe mean free path or the relaxation length is the path traveled by a neutron between two collisions or interactions. The mean free path is divided from the equation for the probability of the first collision in dx. From the equation for the probability of the first collision in dx ( P (x)dx = Σ t dx . e -Σt.x = Σ t e -Σt.x dx ), we can ... WebFeb 15, 2006 · Refractory is an integral part of boilers. In the steam-generating industry, refractory materials are used to fill gaps and openings (to help keep the fire inside the firebox), to line wet and dry ...
Web13 Types of Refractory Materials and Their Applications. Refractory materials are used in various fields of the national economy, such as iron and steel, nonferrous metal, glass, cement, ceramics, petrochemical, machinery, boiler, light industry, electric power, military industry, etc.It is an essential basic material to ensure the production and operation of the …
In optics, optical power (also referred to as dioptric power, refractive power, focusing power, or convergence power) is the degree to which a lens, mirror, or other optical system converges or diverges light. It is equal to the reciprocal of the focal length of the device: P = 1/f. High optical power corresponds to short focal length. The SI unit for optical power is the inverse metre (m ), which is co… iselin footWebAug 29, 2024 · Refractory materials are widely used in the metallurgical, chemical, petroleum, machinery manufacturing, silicate, power and other industrial fields, the largest in the metallurgical industry ... iselin nj post office hoursWebMay 21, 2024 · The refractory period is the span of time after having an orgasm during which a person is not sexually responsive. It can vary from a few minutes to more than a day. Boosting cardiovascular... saddlery brisbane san franciscoWebOct 27, 2024 · Refractory materials are those that can withstand high temperatures without the heat damaging their structure, resistance, or thermal conductivity. In the case of bricks, the chemical composition ... iselin fireWebApr 9, 2024 · In this study, an artificial neural network that can predict the band structure of 2-D photonic crystals is developed. Three kinds of photonic crystals in a square lattice, triangular lattice, and honeycomb lattice and two kinds of materials with different refractive indices are investigated. Using the length of the wave vectors in the reduced Brillouin … saddlery belfast christchurchWebSep 9, 2024 · The word “refractory” in general use means stubborn or intractable, and in medicine it is specifically applied to disease that does not respond to treatment. … saddlery traductionWebApr 15, 2024 · This retrospective comparative study proposes a multi-formula approach by comparing no-history IOL power calculation methods after myopic laser-refractive-surgery (LRS). One-hundred-thirty-two eyes of 132 patients who had myopic-LRS and cataract surgery were examined. ALMA, Barrett True-K (TK), Ferrara, Jin, Kim, Latkany and … saddlery and harness