A highly efficient, diode-pumped, Nd:YAG laser is described. The oscillator utilizes an unstable resonator design with a Gaussian reflectivity output coupler and a side-pumped zigzag slab gain medium. The laser produces 18-mJ, 10-ns pulses at a repetition rate of 242 Hz in a near-TEM00 mode with an optical efficiency of up to 14%. An extended performance test was recently concluded in which the...

Let P be a point set of n points in R. Every point has a label/color (say black or white), but we do not know the labels. In particular, let B and W be the set of black and white points in P . Furthermore, let ∆ = diam(P ), and assume that there exist two parallel hyperplanes h, h′ in distance γ from each other, such that the slab between h and h′ does not contain an point of P , and the points...

The Laramide orogeny is the Late Cretaceous to Palaeocene (80^55 Ma) orogenic event that gave rise to the Rocky Mountain fold and thrust belt in Canada, the Laramide block uplifts in the USA, and the Sierra Madre Oriental fold and thrust belt in Mexico. The leading model for driving Laramide orogenesis in the USA is flat-slab subduction, whereby stress coupling of a subhorizontal oceanic slab t...

The quality factor and mode volume of a nanocavity play pivotal roles in realizing the strong coupling interaction between the nanocavity mode and a quantum dot. We present an extremely simple method to obtain the mode volume and investigate the effect of the slab thickness on the quality factor and mode volume of photonic crystal slab nanocavities. We reveal that the mode volume is approximati...

Figure 3. Coronal (top) and axial (bottom) views from a 3D acquisiton slightly above the heart. Images have 2x2x3 mm resolution. The coronal image shows the 4cm, TB=10 slab profile in vivo. The contrast is consistent across the slab, indicating a flat slab profile. The black level is 0 for these images. Introduction: Balanced steady-state free precession (SSFP) imaging (TrueFISP, FIESTA, balanc...

The conductivity of supporting fractures is an important parameter to evaluate the hydraulic fracturing effect shale reservoirs, and its size affected by many factors. In this paper, proppant optimized evaluated on basis real rock slab simulation actual construction test. laboratory experimental study influence type, sand concentration, embedding fluid residue propping fracture carried out, res...

Water leakage and debris accumulation caused by the expansion joints in a bridge superstructure reduce service life of increase maintenance costs. A link slab is an effective means to eliminate joints, providing continuous deck system. However, load-caused concrete cracking also leads problems associated with water rebar corrosion. In order solve these problems, new type steel–concrete composit...

This paper deals with the interaction between a moving wheelset and a slab track due to the shortpitch corrugated rail. The wheelset is modeled using a free-free Timoshenko beam with attached rigid bodies as the axle boxes, wheels and brake discs. The slab track model consists of elastically supported double EulerBernoulli beams. In fact, both wheelset and slab track are symmetric structures an...

Subduction of oceanic lithosphere occurs through two modes: subducting plate motion and trench migration. Using a global subduction zone data set and three-dimensional numerical subduction models, we show that slab width (W) controls these modes and the partitioning of subduction between them. Subducting plate velocity scales with W(2/3), whereas trench velocity scales with 1/W. These findings ...