منابع مشابه
Coloring half-planes and bottomless rectangles
We prove lower and upper bounds for the chromatic number of certain hypergraphs defined by geometric regions. This problem has close relations to conflict-free colorings [4]. One of the most interesting type of regions to consider for this problem is that of the axis-parallel rectangles. We completely solve the problem for a special case of them, for bottomless rectangles. We also give an almos...
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متن کاملColoring Hypergraphs Induced by Dynamic Point Sets and Bottomless Rectangles
We consider a coloring problem on dynamic, one-dimensional point sets: points appearing and disappearing on a line at given times. We wish to color them with k colors so that at any time, any sequence of p(k) consecutive points, for some function p, contains at least one point of each color. We prove that no such function p(k) exists in general. However, in the restricted case in which points a...
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In her paper Reconstructing Nursing: Evidence, Artistry and the Curriculum, Marks-Maran (1999) attempted to outline a new postmodern paradigm for nursing. Whilst I fully support this timely discussion of new insights into nursing theory and practice, Marks-Maran unfortunately presents a very idiosyncratic version of postmodernism which is both simplistic and, at times; inaccurate. My main conce...
متن کاملDirect Electrochemistry of Polyphenol Oxidase
The electrochemistry of banana tissues on a carbon paste electrode modified with multi-walled carbon nanotubes (MWCNTs) is presented. Cyclic voltammetry is applied to investigate the direct electrochemistry of banana tissues i.e. a source of polyphenol oxidase (PPO). A redox couple with an anodic and counterpart cathodic peak is obtained. The influence of various parameters such as pH,...
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ژورنال
عنوان ژورنال: Denki Kagaku
سال: 2020
ISSN: 2433-3255,2433-3263
DOI: 10.5796/denkikagaku.20-ot0040