We have established a single cell irradiation system, which allows selected cells to be individually hit with defined number of heavy charged particles, using a collimated heavy-ion microbeam apparatus at JAERI-Takasaki. This system has been developed to study radiobiological processes in hit cells and bystander cells exposed to low dose and low dose-rate high-LET radiations, in ways that canno...

In this paper, I lay out the workings of the rather unusual system of positional verbs found in Nen, a language of the Morehead-Maro family in Morehead district, Western Province, Papua New Guinea. Nen is unusual in its lexicalization patterns: it has very few verbs that are intransitive, with most verbs that tend to be intransitive cross-linguistically realized as morphologically middle verbs,...

The concept of positional information is central to our understanding of how cells determine their location in a multicellular structure and thereby their developmental fates. Nevertheless, positional information has neither been defined mathematically nor quantified in a principled way. Here we provide an information-theoretic definition in the context of developmental gene expression patterns...

This paper introduces the class of reflected number systems. Members of this class have the adjacency property, i.e. representations for consecutive numbers differ in only one digit and the magnitude of this difference is one. It shows that every number system based on a positional weighting scheme has a reflected analogue. It presents procedures to convert a number system to its reflected anal...

Abstract. A novel digit system that arises in a natural way in a graph-theoretical problem is studied. It is defined by a set of positive digits forming an arithmetic progression and, necessarily, a complete residue system modulo the base b. Since this is not enough to guarantee existence of a digital representation, the most significant digit is allowed to come from an extended set. We provide...

The authors compared the efficacy of a self-applied modified Semont maneuver (MSM) with self-treatment with a modified Epley procedure (MEP) in 70 patients with posterior canal benign paroxysmal positional vertigo. The response rate after 1 week, defined as absence of positional vertigo and torsional/upbeating nystagmus on positional testing, was 95% in the MEP group (n = 37) vs 58% in the MSM ...

Let $K=\mathbb{Q}(\theta)$ be a number field generated by complex root $\theta$ of monic irreducible trinomial $F(x) = x^n+ax+b \in \mathbb{Z}[x]$. There is an extensive literature on monogenity fields defined trinomials. For example, Gaál studied the multi-monogenity sextic Jhorar and Khanduja provide some explicit conditions $a$, $b$ $n$ for $(1, \theta, \ldots, \theta^{n-1})$ to power integr...