In this paper, we study slant helix using modified orthogonal frame in Minkowski space E31 with timelike, lightlike and spacelike axes. We also a general the Killing vector field axis. Furthermore, give non-trivial example find relations for curvature torsion of f-biharmonic helix.

In this paper, position vectors of a time-like curve with respect to standard frame of Minkowski space E31 are studied in terms of Frenet equations. First, we prove that position vector of every time-like space curve in Minkowski space E31 satisfies a vector differential equation of fourth order. The general solution of mentioned vector differential equation has not yet been found. By special c...

This study reveals the essence of ligand recognition mechanisms by which calmodulin (CaM) controls a variety of Ca(2+) signaling processes. We study eight forms of calcium-loaded CaM each with distinct conformational states. Reducing the structure to two degrees of freedom conveniently describes main features of the conformational changes of CaM via simultaneous twist-bend motions of the two lo...

Search is embeded in an overlapping-generations model. Young people participate a centralized market and a decentralized market sequentially and olds only participates the centralized market. The demographic feature allows analytical tractability. In a series examples, positve inflation rates are Pareto optimal. JEL classification: E31

Differential tax analysis is used to show how the socially optimal fiscal-tax to liquidity-tax ratio changes with the relative size of the tax-evading hidden economy. The smaller the relative size of the hidden economy, the larger the optimal fiscal-tax to liquidity-tax ratio. The empirical cross-section and panel evidence supports this theoretical result. JEL: E31, E52, H21, O17

This paper estimates a structural VAR model of U.S. consumer and world commodity prices. An equiproportional long-run response of nominal price levels to amonetary shock yields identifying restrictions. Exogenous innovations tomonetary policy account for a sizable share of the co-movement of these series, including during episodes more commonly attributed to “supply shocks.” JEL Categories: C32...

This paper presents out-of-sample inflation forecasting results based on relative price variability and skewness. It is demonstrated that forecasts on long horizons of 1.5-2 years are significantly improved if the forecast equation is augmented with skewness. JEL: E17, E31, C43

Boschen and Weise (Journal of Money, Credit and Banking, 2003) model the probability of a large upturn in in‡ation. We extend their work to show that openness to trade exerts a negative e¤ect on the probability of such an event. Keywords: In‡ation starts, trade openness. JEL classi…cation: E31, F41.

In this paper we develop the first search-theoretic monetary model of a two-country global economy. We show the connection between deep monetary frictions (i.e. search and matching frictions), capital holdup externalities, and the realization of an endogenous departure from the “excess smoothness” problem in the real exchange rate found in standard models. Using this alternative monetary model,...