منابع مشابه
Predecessors of preprint servers
Although there was an early experiment in the 1960s with the central distribution of paper preprints in the biomedical sciences, these sciences have not been early adopters of electronic preprint servers. Some barriers to the development of a ‘preprint culture’ in the biomedical sciences are described. Multiple factors that, from the 1960s, fostered the transition from a paper-based preprint cu...
متن کاملSemmelWeis and his predecessors.
IGNAZ SEMMELWEIS is generally known for identifying puerperal fever as an infectious disease preventable by aseptic methods. While no-one today would contest the importance, the practicality, or the independence of his contribution, its originality has been disputed from the beginning. When Semmelweis first reported his ideas in Vienna, a veterinarian claimed priority for the discovery.' The fi...
متن کاملRandom input helps searching predecessors
We solve the dynamic Predecessor Problem with high probability (whp) in constant time, using only n bits of memory, for any constant δ > 0. The input keys are random wrt a wider class of the well studied and practically important class of (f1, f2)-smooth distributions introduced in [3]. It achieves O(1) whp amortized time. Its worst-case time is O( √ logn log logn ). Also, we prove whp O(log lo...
متن کاملAnthropocene rockfalls travel farther than prehistoric predecessors
Human modification of natural landscapes has influenced surface processes in many settings on Earth. Quantitative data comparing the distribution and behavior of geologic phenomena before and after human arrival are sparse but urgently required to evaluate possible anthropogenic influences on geologic hazards. We conduct field and imagery-based mapping, statistical analysis, and numerical model...
متن کاملAre recent cohorts healthier than their predecessors?
OBJECTIVES This article examines changes in the health status of Canadian adults between 1978/79 and 1996/97. DATA SOURCES Data are from the the Canadian Vital Statistics Data Base, the 1991 General Social Survey, the 1978/79 Canada Health Survey (CHS), and the 1996/97 National Population Health Survey (NPHS). ANALYTICAL TECHNIQUES Age-specific mortality rates are presented for 1978 and 199...
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ژورنال
عنوان ژورنال: Concrete Journal
سال: 2009
ISSN: 0387-1061,2186-2753
DOI: 10.3151/coj.47.3_72