My research plan for the next few years and for the next decade is to extend my current research to answers the broad questions: (1) How do disks evolve and form planetary systems? (2) What is the origin of life? We have been taking advantage of the Spitzer Space Telescope to reveal various stages of star formation and evolution of protoplanetary disks. One of our major achievements with Spitze...

I briefly review the growing evidence that thick stellar disks surround most edgeon disk galaxies. Recent studies show that these extragalactic thick disks have old ages, low metallicities, long scale lengths, and moderately flattened axial ratios, much like the thick disk of the Milky Way. However, the properties of thick disks change systematically with the mass of the galaxy. The thick disks...

The first-order phase transition near 40◦C in as-grown thin epitaxial MnAs films prepared by molecular beam epitaxy on GaAs(001) and nanometer-scale disks fabricated from the same films is studied. The disks are found to exhibit a pronounced hysteresis in the temperature curve of the phase composition, i.e. supercooling and overheating take place in the disks whereas they are far less in the sa...

The structure of magnetic fields within protostellar disks may be studied via polarimetry provided that grains are aligned in respect to magnetic field within the disks. We explore alignment of dust grains by radiative torque in T Tauri disks and provide predictions for polarized emission for disks viewed at different wavelengths and viewing angles. We show that the alignment is especially effi...

For a family F of n mutually disjoint unit disks in the plane, we show that if any four disks are intersected by a line then there is a line that intersects at least n− 1 disks of F .

We consider the problem of placing a set of disks in a region containing obstacles such that no two disks intersect. We are given a bounding polygon P and a set R of possibly intersecting unit disks whose centers are in P . The task is to find a set B of m disks of maximum radius such that no disk in B intersects a disk in B ∪ R, where m is the maximum number of unit disks that can be packed. B...

Two methods of preparing sensitivity disks were compared for their effect on disk stability at 25 and 37 C. One method consisted of applying a solution of the antibiotic to blank disks by the conventional procedure; the second method consisted of applying the antibiotic to the disks as a suspension of crystals. Of the four beta-lactam antibiotics that were studied, disks made with suspended cry...

Calcium accumulation by rod disks was studied in excised bullfrog retinas with 45Ca tracer-exchange methods. Ca uptake by disks is a necessary requirement if light-induced Ca releases from disks mediate photoreceptor excitation. In an hour-long incubation, disks exchanged less than or equal to 0.01 mole of Ca per mole of rhodopsin, or less than or equal to 10% of their total Ca. This correspond...

The self-assembled monolayer (SAM) was prepared using octadecyl trichlorosilane (OTS) in distilled solution on the copper surface. The effect of inhibitor concentration on the rate of inhibition efficiency and corrosion rate in corrosion medium on copper by using polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM) was studied. The results showed...