Suppose that there are n jobs and n machines and it costs cij to execute job i on machine j. The assignment problem concerns the determination of a one-to-one assignment of jobs onto machines so as to minimize the cost of executing all the jobs. When the cij are independent and identically distributed exponentials of mean 1, Parisi [Technical Report cond-mat/9801176, xxx LANL Archive, 1998] mad...

When modeling the behavior of firms, marketers and micro-economists routinely confront complex problems of strategic interaction. In competitive environments, firms make strategic decisions that not only depend on the features of the market, but also on their beliefs regarding the reactions of their rivals. Structurally modeling these interactions requires formulating and estimating a discrete ...

Many situations in real world cannot be described by a single variable. Simul taneous occurrence of multiple events warrants multivariate distributions. For instance, univariate geometric distribution can represent occurrence of failure of one component of a system. However, to study systems with several com ponents that may have different types of failures, such as twin engines of an airplane ...

Proteins can perform functions when they fold into proper three-dimensional structures. However, since determining the structure of a protein through wet-lab experiments can be time-consuming and laborintensive, computational approaches are preferable. To characterize the structural topology of proteins, Linderstrøm-Lang proposed the concept of a protein structure hierarchy with four levels: pr...

couples use to control their family size.3 In India, people often equate the term family planning with sterilization, although government policies aim to promote the use of reversible methods.4 Several factors account for sterilization’s widespread use in India. Government incentives offered both to potential users and to providers throughout the late 1960s and the 1970s* undoubtedly contribute...

In the article by Mohanan Nair et al, “A Case of Rheumatic Fibrinous Pericarditis,” which appeared in the December 2016 issue of the journal (Circ Cardiovasc Imaging. 2016;9:e005399. DOI: 10.1161/CIRCIMAGING.116.005399), a correction is needed. On page 1, the second sentence should read: “He provided history of rheumatic fever in the past and was on intramuscular benzathine penicillin prophylax...

Arias AI, Giles B, Eiermann TH, Sterry W, Pandey JP: TNF alpha gene polymorphism in psoriasis. Clin Exp Immunogenet 14:118±122, 1997 HoÈhler T, Kruger A, Schneider PM, et al: A TNF-alpha promoter polymorphism is associated with juvenile onset psoriasis and psoriatic arthritis. J Invest Dermatol 109:562±565, 1997 Imanishi T, Akaza T, Kimura A, Tokunaga K, Gojobori T: Allele and haplotype frequen...

A quantum metasurface is integrated with a single emitter utilizing Kerker condition to modulate the emission pattern both spectrally and spatially (see article number 2200978 by Megha Khokhar, Faraz A. Inam, Rajesh V. Nair). large enhancement of 400 times in decay rate achieved at NV-center zero phonon line wavelength 640 nm superior directionality. These findings open door for manipulating ph...