We developed a new holmium-doped triple-clad fiber (Ho-3CF), reducing the clad diameter to improve overlap between pump and doped-core, holmium concentration reduce influence of ion clustering on laser efficiency. illustrate here performance this in oscillator configuration. The emission is centered at 2.12 m by Bragg grating, active pumped 1.94 m thulium-doped laser. slope effici...

Missing pellet surface (MPS) defects are local geometric defects in nuclear fuel pellets that result from pellet mishandling or manufacturing. The presence of MPS defects can cause clad stress concentrations that are substantial enough to produce through-wall cladding failure for certain combinations of fuel burnup, and reactor power level or power change. Consequently, the impact of potential ...

Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder of a cobalt-based alloy, Co-28Cr-9W-1.5Si, by laser cladding. The process window is very narrow, therefore, a precisely controlled Yb ...

ALCYONE simulations of integral RIA transients performed on UO2 fuel rods prior to or within the ALPS program in Japanese NSRR facility with stagnant liquid water coolant conditions are presented this paper. The 11 selected tests which cover a wide range enthalpy increases (200 J/g – 800 J/g) aimed at assessing/challenging capabilities four quantities interest: clad outer surface peak temperatu...

Chronic lung allograft dysfunction (CLAD) remains the major barrier to long-term success after lung transplantation. This report compares gross and microscopic features of lungs removed from patients receiving a redo-transplant as treatment for CLAD. Lungs donated by patients with either the bronchiolitis obliterans syndrome (BOS) or restrictive allograft syndrome (RAS) phenotype of CLAD and ap...

Lung transplantation may be the only intervention that can prolong survival and improve quality of life for those individuals with advanced lung disease who are acceptable candidates for the procedure. However, these candidates may be extremely ill and require ventilator and/or circulatory support as a bridge to transplantation, and lung transplantation recipients are at risk of numerous post-t...

A detailed computational study is presented for the radial-axial modes-both leaky and nonleaky--in an infinitely clad isotropic rods. The complex phase velocities of leaky modes are located using an application of the argument principle. Particle orbits are determined, and leaky modes are shown to have an asymptotic leakage angle away from the interface. By using the homotopic methods of varyin...

This paper presents a measurement method for determining effective conductivity of copper-clad dielectric laminate substrates in the millimeter-wave region. The conductivity is indirectly evaluated from measured resonant frequencies and unloaded Q values of a number of Whispering Gallery modes excited in a circular disk sample, which consists of a copper-clad dielectric substrate with a large d...

Powell's (1984, Journal of Econometrics 25, 303}325) censored least absolute deviations (CLAD) estimator for the censored linear regression model has been regarded as a desirable alternative to maximum likelihood estimation methods due to its robustness to conditional heteroskedasticity and distributional misspeci"cation of the error term. However, the CLAD estimation procedure has failed in ce...

We present the results of the experimental study and comparison of Yb-free, Erdoped, all-fiber, alignment free, single frequency (SF) fiber amplifiers operating under 980-, 1470and 1530-nm pumping for the coreand clad-pumping architectures. In the single-mode core-pumped configuration Er-doped fiber amplifiers demonstrated 52% and 60% pump to output efficiencies for 980 and 1480 nm pump wavelen...