THE recent excavation of many ancient sites in Palestine enables us to form a fair, though necessarily an incomplete, conception of the hygienic conditions of ancient times. From the earliest housedwellers down to at least the "Greek" period, the streets and houses of even the most important towns of Palestine resembled those of its modern villages. The streets were very narrow and crooked, lai...

Humans live interacting with other people and do everyday tasks in individual and collective ways. Robotics people are interested in building robots that can interact with people in the same way that humans do. In order to reach this goal robots must learn from the interaction with humans and learn the human skills used in everyday life to acquire robot social behaviors that can then be used in...

We numerically simulate the transport of elliptic Janus particles along narrow two-dimensional channels with reflecting walls. The self-propulsion velocity of the particle is oriented along either its major (prolate) or minor axis (oblate). In smooth channels, we observe long diffusion transients: ballistic for prolate particles and zero diffusion for oblate particles. Placed in a rough channel...

Hollow CdS nanoboxes, having paper-thin walls of well-defined facets, were synthesized at 170 degrees C via a simple reaction using Na(2)SeO(3) for interior quasitemplates and ethylenediamine for exterior molecular templates.

The spin dynamics of a domain wall is studied in an infinite ferromagnetic chain with an easyaxis anisotropy as well as in a chain of finite size. The dependence of the intrinsic mode frequency of the domain wall on the exchange interaction is studied for all admissible values of the latter. It is shown that this dependence is considerably modified in the region of transition of the domain wall...

Spadicoides hodgkissa sp. nov. and Spadicoides arengae sp. nov., recorded from submerged decaying wood in Hong Kong and from decaying palm fronds in Brunei, are described and illustrated. Spadicoides hodgkissa is characterized by versicolored, obovoid conidia with up to 2 septa, including a distal distoseptum and a proximal euseptum, while Spadicoides arengae is characterized by unicellular, el...

Electronic states at domain walls in bilayer graphene are studied by analyzing their four- and two-band continuum models, by performing numerical calculations on the lattice, and by using quantum geometric arguments. The continuum theories explain the distinct electronic properties of boundary modes localized near domain walls formed by interlayer electric field reversal, by interlayer stacking...