BACKGROUND The reversed clock phenomenon results in the transposition of objects from one side to another. Its major manifestation consists in the reversal of clock numbers in clock-drawing test. It could be due to a stroke disrupting attentional cerebral network. This phenomenon usually regresses in a few days. OBJECTIVE To report a case of reversed clock phenomenon with disorders of space r...

Hashing is emerging as a powerful tool for building highly efficient indices in large-scale search systems. In this paper, we study spectral hashing (SH), which is a classical method of unsupervised hashing. In general, SH solves for the hash codes by minimizing an objective function that tries to preserve the similarity structure of the data given. Although computationally simple, very often S...

An example of reversed reciprocal rhythm is presented with associated 2:I heart block and other abnormalities of conduction. The electrocardiograms have been analysed and compared with an earlier electrocardiogram in which sinus rhythm was present. Despite dramatic electrocardiographic abnormalities, evidence is offered which suggests that there may have been only a small alteration in activity...

KREEL, L., and ELLIS, H. (1965): Pyloric Stenosis in Adults: a Clinical and Radiological Study of 100 Consecutive Patients, Gut, 6, 253. MIALARET, J. In WEISS, A. G., and HOLLENDER, L. F. (1964): (Ed.) La Vagotomie dans l'Ulcere GastroDuodeno-Jejunal. Paris: Expansion Scientifique Francaise. MOODY, F. G., CORNELL, G. N., and BEAL, J. M. (1962): Pyloric Obstruction Complicating Peptic Ulcer, Arc...

Mark Wheeler's Focus article, "Measuring Mercury" (1), which appeared in the August 1996 issue of EHP, contained a serious omission. Wheeler concentrated on methyl mercury and, to a lesser extent, elemental mercury in dental amalgams. He failed to mention the relatively recently described but extremely significant exposures to elemental mercury in ethnically Hispanic and Caribbean homes, conseq...

The expression “reversed predication” is not common. It is used in the field of symbolic logic to define complex conditions of negation. There are two key places where reversed predication, under a different, more general application, plays a key role: (1) George Spencer-Brown’s non-numerical calculus (Laws of Form, 1969), as applied to the “sorites” of Lewis Carroll, and (2) Slavoj Žižek’s ide...

SOLLECITO, WILLIAM A. The Time Reversed Crossover Design in Health Servi ces Research. "(Under the di rect i on of DENNIS B. GILLINGS.) Hea1th servi ces pol icy is often determi ned based on natu ra lly occurring experiments. Because true experimental designs cannot be used, quasi-experimental designs must be Bpplied to such experiments in order to draw valid conclusions. Among the wide variety...