A dataset of modern and fossil distribution of coccolithophore species Florisphaera profunda in the world׳s ocean.

We compiled modern and fossil relative abundance of coccolithophore species Florisphaera profunda from published and unpublished datasets, along with ocean environmental variable data from satellite remote sensing and physical measurements. The database includes relative abundances of F. profunda in sediment trap (n = 26) and core-top (n = 1258), and sediment core samples (n = 104). Downcore data covers the Last Glacial Maximum (n = 94, 24-19 ka) or the Mid-to-Late Holocene (n = 77, <6 ka). This database allows studying modern and past biogeography of F. profunda as a response to changing ocean and climate conditions, "Quantitative reconstruction of primary productivity in low latitudes during the last glacial maximum and the mid-to-late Holocene from a global Florisphaera. profunda calibration dataset" (Hernández-Almeida et al., 2018).

Storage of 500 high-resolution holograms in a LiNbO(3) crystal.

We have recorded (at room temperature) as many as 500 high-resolution, uniformly diffracting volume holograms in a single Fe-doped LiNbO(3) crystal. The holograms were stored by angularly multiplexing a plane-wave reference beam. The graphical procedure that we used to compute exposure schedules is described. Experimental results are also presented.

Continuous-time optical neural network associative memory.

A continuous-time optical neural network capable of executing a broad class of energy-minimizing neural net algorithms has been built. The network is a ring resonator comprising a saturable, two-beam amplifier that acts as an optical neuron array, two volume holograms that provide global network interconnectivity, and a linear, twobeam amplifier that provides sufficient gain to permit network oscillation. The network has been used as an associative memory to store and recall multiple, nonorthogonal visual images.

Distributed Bragg deflector: a multifunctional integrated optical device.

The properties of wide-angle integrated optical Bragg deflectors which utilize slab-coupled optical waveguides, are analyzed. Specifically considered is the interaction that occurs, via the intermediary of a periodic waveguide perturbation, between an incident wave guide within the core region of the structure and a Bragg deflected beam guided within the slab region of the structure. The deflection efficiencies and far-field deflected-beam intensity patterns characteristic of this device configuration, which we term a distributed Bragg deflector or DBD, are derived for both T.E.-polarized and T.M.-polarized incident waves and for deflection angles between pi/4 and 3pi/4 rad. Following these derivations, discussion is made of the potential device applications of the basic DBD structure, including its use as an integrated optical modulator, polarizer/analyzer, beam divider, beam deflector, and intrawaveguide beam expander.

Renal pelvic tumors.

A study was made of 35 patients with tumors of the renal pelvis. Tumors were indipendently graded and staged by a newly proposed method. The method of staging correlated well with grading of renal pelvic tumors and bore a direct relationship with prognosis. The high incidence of associated urothelial tumors, especially on the involved side, mandated radical nephroureterectomy including a bladder cuff as the treatment of choice.