We establish that there are bounded Jordan domains Ω ⊂ R (n ≥ 2) that do not carry a (nontrivial) doubling measure with respect to the Euclidean distance. More generally, it is shown that every nonempty metric space (X, d) without isolated points has an open and dense subset A such that (A, d) does not carry a doubling measure.

2014 A simple mechanical system consisting of a bouncing ball subject to repeated impacts with a vibrating table is studied in the period doubling regime. Two control parameters (the table’s forcing frequency and amplitude) are varied to discover the curves in parameter space that separate periodic orbits. Experimental results for the period doubling boundaries agree with calculations from a si...

Let μ be a Radon measure on R, which may be non doubling. The only condition that μ must satisfy is the size condition μ(B(x, r)) ≤ C r, for some fixed 0 < n ≤ d. Recently, the author introduced spaces of type BMO(μ) and H(μ) with properties similar to ones of the classical spaces BMO and H defined for doubling measures. These new spaces proved to be useful to study the L(μ) boundedness of Cald...

Can elderly adults automatize a new task? To address this question, 10 older adults each performed 10,080 training trials over 12 sessions on an easy but novel task. The psychological refractory period (PRP) procedure was then used to evaluate whether this highly practiced task, when presented as task 2 along with an unpracticed task 1, could proceed automatically. If automatic, task 2 processi...

O consagrado livro de Benedito Nunes sobre Clarice Lispector, cuja versão definitiva (e expandida) foi publicada em 1989, teve duas edições anteriores: a primeira 1966, com o título mundo e segunda 1973, intitulada Uma leitura Lispector. A versão, 1966 chamou atenção do filósofo Vilém Flusser, que escreveu publicou no Suplemento Literário Estado São Paulo, sua edição 25/06/1966, uma entusiasmad...

In patients with iron-deficiency anaemia, acid secretion was found to be reduced and was associated with chronic gastritis (Davidson and Markson, 1955; Joske, Finckh, and Wood, 1955; Badenoch, Evans, and Richards, 1957; Lees and Rosenthal, 1958; Floch and Meroney, 1962; Bock, Richards, and Witts, 1963; Dagg, Goldberg, Anderson, Beck, and Gray, 1964; Ikkala and Siurala, 1964; Cowan, Joseph, and ...

OBJECTIVE To investigate whether fatal accidents, including drownings, have decreased among Icelandic fishermen and seamen. DESIGN Historical prospective study. The study population was record linked with the National Register and the Register of Deceased to get information on water transport accidents (ICD-7, E850-E858) during the period 1966-86. The number of persons in each calendar year a...

Plague is an endemic disease to the west of Iran and has frequently stricken this area over the last decades. In 1954, Pasteur Institute of Iran established a research station in the west of the country and since then has monitored the plague outbreaks as well as the disease status in rodents and carnivores by dispatching research teams to different villages and localities. We noticed that ther...

We used functional magnetic resonance imaging (fMRI) to investigate the psychological refractory period (PRP), the delay in the response to the second of two tasks occurring in immediate succession. Our results were consistent with prior work on the PRP in that when two visual-manual tasks were presented within 100 ms of each other, the second response was delayed on the order of 500 ms, compar...

It has been argued that the psychological refractory period (PRP) effect is eliminated with two ideomotor compatible tasks when instructions stress fast and simultaneous responding. Three experiments were conducted to test this hypothesis. In all experiments, Task 1 required spatially compatible manual responses (left or right) to the direction of an arrow, and Task 2 required saying the name o...