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We present a simple model of gauge mediated supersymmetry breaking with composite messenger fields. Our model is based on the gauge group SP (8) × SU(2). By the strong SP (8) dynamics, supersymmetry is dynamically broken and the composite fields with charges under the standard model gauge group appear at low energy. The U(1)R symmetry breaking mass terms for the composite fields are generated b...

The SU(3) symmetric chiral quark model, which describes interactions between quarks, gluons and the Goldstone bosons, explains reasonably well many aspects of the flavor and spin structure of the proton, except for the values of f 3 /f 8 and ∆ 3 /∆ 8. Introducing the SU(3)-breaking effect suggested by the mass difference between the strange and nonstrange quarks, we find that this discrepancy c...

SU-8 resist is an epoxy resin dissolved with a photoinitiator in an organic solvent. The result is a negative resist originally developed for high aspect ratio MEMS applications. For some applications SU-8 has several advantages over the most commonly used e-beam resist, PMMA, which include a much higher sensitivity and increased chemical and mechanical robustness. We have used our Raith 150 el...

Large cross section multimode waveguides have been realized in SU-8 using selective polymerization. SU-8 is a negative photoresist, which has shown good optical properties and it is mechanically and chemically stable. The fabricated waveguides have very smooth sidewalls and exhibit low optical losses. The fabrication method is simple and potentially very cost effective. N x N and 1 x N multimod...

The status of coupling constant unification in standard supersymmetric SU (5) model and its extensions is discussed. Taking into account uncertainties related with the initial coupling constants and threshold corrections at the low and high scales we find that in standard supersymmetric SU (5) model the scale of the supersymmetry breaking could be up to 10 8 Gev. In the extensions of standard S...

In some recent papers, we studied pure SU(4) gauge theory with the Wilson action on a hypercubical lattice in four space t ime dimensions and found a firstorder phase transition at/3 = 10.2 [1 ], that this phase transition was not deconfining [2] and measured the asymptotic freedom scale parameter A 0 [2]. In the present paper, we wish to apply a renormalizationgroup scheme [3] for comparing th...

We calculate instanton corrections to three dimensional gauge theories with N = 4 and N = 8 supersymmetry and SU(n) gauge groups. The N = 4 results give new information about the moduli space of n BPS SU(2) monopoles, including the leading order non-pairwise interaction terms. A few comments are made on the relationship of the N = 8 results to membrane scattering in matrix theory.

We study ten-dimensional N=2 maximal chiral supergravity in the context of Lie superalgebra SU(8/1). The possible successive superalgebraic truncations from ten dimensional N=2 chiral theory to the lower dimensional supergravity theories are systematically realized as sub-superalgebraic chains of SU(8/1) by using the Kac-Dynkin weight techniques. PACS Nos: 04.65.+e, 11.30.Pb ∗ E-mail address : ...

Electrowetting on dielectric (EWOD) is a promising technology for variable focus liquid microlens. When an electrical field is applied across a liquid droplet and a dielectric layer, the contact angle of the liquid can be tuned with different applied voltages. Therefore, the focal length of a microlens would vary by simply applying an electrical field without any moving mechanical components. I...