La lex artis es el criterio que emplea Derecho para determinar la corrección de práctica médica y, por analogía, otras profesiones o actividades. Se trata, tanto, un factor decisivo concretar alcance los deberes, responsabilidades y derechos profesionales usuarios.

This paper reviews and relates two default reasoning mechanisms, lexicographic (lex) and maximum entropy (me) entailment. Meentailment requires that defaults be assigned speci c strengths and it is shown that lex-entailment can be equated to me-entailment for a class of speci c strength assignments. By clarifying the assumptions which underlie lex-entailment, it is argued that me-entailment is ...

The localization of three carbohydrate antigens, Lex, Ley, and sialylated Lex-i, which are closely related to stage-specific embryonic antigen 1, in the lung of developing human embryos was investigated using specific monoclonal antibodies. In the 38-day-old embryo, when the primitive lung bud has appeared and developed into two lung sacs, only Ley antigen was specifically positive in the proli...

This paper introduces the Terminological and Conceptual Joint instrument (TCJ) as a new tool that can improve EURLex, with the goal of enabling legal experts to retrieve with greater accuracy data and documents they may need.

OBJECTIVES This investigation examined the effect of 6 months of high- or low-intensity resistance exercise on muscular strength and endurance and stair climbing ability in adults aged 60 to 83. DESIGN A randomized controlled trial. SETTING University of Florida Center for Exercise Science. PARTICIPANTS Sixty-two men and women completed the study protocol. Subjects were matched for streng...

Neural stem cells (NSCs) can be isolated from different regions of the central nervous system. There has been controversy whether regional differences amongst stem and progenitor cells are cell intrinsic and whether these differences are maintained during expansion in culture. The identification of inherent regional differences has important implications for the use of these cells in neural rep...

A binary string B of length n = kt is a k-ary Dyck word if it contains t copies of 1, and the number of 0s in every prefix of B is at most k−1 times the number of 1s. We provide two loopless algorithms for generating k-ary Dyck words in cool-lex order: (1) The first requires two index variables and assumes k is a constant; (2) The second requires t index variables and works for any k. We also e...