Differentiation is an epigenetic process which is installed by changes of transcriptional programs over successive cellular divisions. A number of studies have reported the effects of biochemical modifications of chromatin (DNA and chromatin proteins) on the regulation of transcription. Although, these studies are able to explain how transcription of a given gene is regulated (toward activation...

We work over fields of characteristic 0. Let X be a variety of general type defined over a number field K. A well known conjecture of S. Lang [L] states that the set of rational points X(K) is not Zariski dense in X. As noted in [א], this implies that if X is a variety which only dominates a variety of general type then X(K) is still not dense in X. J. Harris proposed a way to quantify this sit...

The authors examined the influence of age on variety seeking in 3 experiments. When given choices among jellybeans or music, age differences in variety seeking emerged. Younger adults selected similar levels of variety when choosing what to consume immediately and what to consume later. In contrast, older adults consistently chose less variety when making choices to be consumed at a later time ...

We study two major issues in retail inventory management: (1) The optimal set of variants (the assortment problem), that is, how many and which variants should be carried by retailers; and (2) the optimal inventory policy, given a set of variants. It is well known that it is difficult to reach analytically tractable solutions solving these problems because of the randomness in the total market ...

Following Barberà, Sonnenschein, and Zhou (1991, Econometrica 59, 595-609), we study rules (or social choice functions) through which agents select a subset from a set of objects. We investigate domains on which there exist nontrivial strategy-proof rules. We establish that the set of separable preferences is a maximal domain for the existence of rules satisfying strategyproofness and no-vetoer.

Ectopic eruption of teeth occurs in a variety of locations. Commonly seen in palate and maxillary sinus, they have also been reported in nasal cavity, orbit, mandibular condyle, coronoid process, and facial skin.Here, we report a rare case of recurrent sinusitis caused by ectopic tooth in right ethmoid sinus and successful endoscopic removal of it. The symptoms of the patient disappeared after ...

This study measures the perceived costs, perceived benefits, choice outcome satisfaction, and choice process satisfaction from consumers making hypothetical choices amongst prescription drug plans. I juxtapose the number of options the consumer is choosing between and his/her perceived variety of the choice set to understand which contributes more to explaining these outcomes. I find that once ...