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Recently, Seo and Lee proposed a modification to the Park and Lee’s nominative proxy signature scheme for mobile communication such that the original signer enables a proxy signer to nominate the verifier. However, the original signer can generate a valid nominative proxy signature without the proxy signer’s knowing. In this paper, we show that Seo and Lee’s modification is insecure against the...

We study self-excited oscillations (SEO) in an on-fiber optomechanical cavity. Synchronization is observed when the optical power that is injected into the cavity is periodically modulated. A theoretical analysis based on the Fokker-Planck equation evaluates the expected phase space distribution (PSD) of the self-oscillating mechanical resonator. A tomography technique is employed for extractin...

The first SeO(2) induced (Z)-selective allylic alcohol formation of dialkyl alkylidenesuccinates has been demonstrated to accomplish one-step syntheses of several essential butenolides and fused butenolides via an unusual E- to Z- carbon-carbon double bond isomerisation followed by the lactonization pathway. The observed regio- and stereoselective SeO(2) allylic oxidation protocol has also been...

Objetivos: evaluar el rendimiento y la calidad de 11 híbridos pimiento. Metodología: ensayo se desarrolló en ambiente protegido, Alajuela, Costa Rica. Se empleó fibra coco como sustrato para las plantas, suministro nutrientes fue mediante fertirrigación. Resultados: halló una importante variabilidad los datos obtenidos por edad al inicio cosecha (75 – 82 días luego trasplante), cantidad frutos ...

Abstract The role of underwriters is altered in new seasoned equity offering deal types which the follows quickly after its announcement. Controlling for endogenous matching between issuing firms and underwriters, we find increased underwriter reputation mitigates immediate price impact announcing an accelerated bookbuilt offering, exacerbates a bought has no fully marketed deals. In contrast, ...

Sustainable entrepreneurship is a critical component of the solutions to global challenges our time. Yet stimulate sustainable orientation (SEO), creating supportive environmental conditions key. While impact various external on highly studied, such factors startup founders not yet well-researched, particularly outside western hemisphere. This quantitative study sheds light perceived support an...

Selenoprotein M (SelM), one of the executants of selenium in vivo, is highly expressed in human brain and most probably involved in antioxidation, neuroprotection, and intracellular calcium regulation, which are the key factors for preventing the onset and progression of Alzheimer's disease (AD). In this paper, human SelM was successfully overexpressed in human embryonic kidney cells HEK293T. S...