Mixed-model assembly lines often create model imbalance due to differences in task times for the different product models. Smoothing algorithms guided by meta-heuristics that can escape local optimums can be used to reduce model imbalance. In this research we utilize the metaheuristics tabu search (TS), the great deluge algorithm (GDA) and record-to-record travel (RTR) to reduce three objective...

In this note we discuss the search for new gauge forces beyond the Standard Model. In particular we give an overview for the simplest case of a new U(1), kinetically mixed with the Standard Model photon (hypercharge boson), a socalled hidden photon (also known as dark photon, heavy photon or A′).

In this research, some of the inorganic complexes of uranyl with N- donor ligandswere synthesized. Complexes were characteriezed by FT-IR and UV spectra, ¹HNMR,¹³CNMR and some physical properties. The uranyl unit (UO2) is composed of a center ofuranium atom with the charge (+6) and two oxygen atom by forming two U=O double bonds.The structure is linear (O=U=O, 180) and usually stable. So other ...

The hierarchy in the Yukawa couplings may be the result of a gauged horizontal U(1)H symmetry. If the mixed anomalies of the Standard Model gauge group with U(1)H are cancelled by a Green-Schwarz mechanism, a relation between the gauge couplings, the Yukawa couplings and the μ-term arises. Assuming that at a high energy scale g 3 = g 2 2 = 5 3g 2 1 and (memμmτ )/(mdmsmb) ∼ λ (where λ is of the ...

Solution of In-Class Exercise 1: Lines Intersecting Segment Let s be a line segment in the plane R, and let u, v 2 R be the two endpoints that delimit it. Let furthermore L be the set of all non-vertical lines l that intersect s. A simple characterization of L would be that any non-veritcal line l is contained in L if and only if one of the following occurs: (i) l contains u or (ii) l contains ...

We analyse maintenance cost data for Swedish railway infrastructure in relation to traffic volumes and other characteristics, and separate the cost impact from passenger and freight trains. Lines with mixed passenger and freight traffic, and dedicated freight lines are analysed separately using both log-linear and Box-Cox regression models. We find that for mixed lines, the Box-Cox specificatio...

In [1], Buhler et al. considered the following scenario. Given a collection U of unit magnitude complex numbers and a set S of constructed points initially containing just 0 and 1, through each constructed point draw lines whose angles with the real axis are in U . The intersections of such lines are also constructed points. Upon taking the closure we form a set R(U). They investigated which U ...