منابع مشابه
Duplicating Thoughts Kirk
Suppose that a physical duplicate of me, right down to the arrangements of subatomic particles, comes into existence at the time at which I finish this sentence. Suppose that it comes into existence by chance, or at least by a causal process entirely unconnected with me. It might be so situated that it, too, is seated in front of a computer, and finishes this paragraph and paper, or a correspon...
متن کاملCentrioles: Duplicating Precariously
To assemble a mitotic spindle and accurately segregate chromosomes to progeny, a cell needs to precisely regulate its centrosome number, a feat largely accomplished through the tight control of centriole duplication. Recent work showing that the overexpression of centriolar proteins can lead to the formation of multiple centrioles in the absence of pre-existing centrioles challenges the idea th...
متن کاملPhysical properties of elastic duplicating materials.
Agar has been used for a number of years in the preparation of elastic duplicating materials. These duplicating materials have been used mainly in partial denture prosthesis for the preparation of a duplicate refectory cast of the original stone cast of the patient's mouth. Since moderately large quantities of duplicating materials are used in these procedures, the low cost and reversibility of...
متن کاملDuplicating and its Applications in Batch Scheduling
In this paper, we firstly describe a technique named Duplicating, which duplicates machines in batch scheduling environment. Then we discuss several applications of Duplicating in solving batch scheduling problems, for the batch scheduling problem on unrelated parallel machines to minimize makespan, we give an (4− 2 B )-approximation algorithm and an (2− 1 B + ǫ) algorithm when m is fixed. We a...
متن کاملDuplicating Contingent Claims by the Lagrange Method
The problem of investing y (0) dollars at time 0 to duplicate a contingent claim is formulated as a dynamic optimization problem and solved by the Lagrange method. As an example, the well-known formula of Black and Scholes on option pricing is derived. If the function defining dy (t) is concave in y (t), owing to costs of trading in incomplete markets, there is economy of scale in producing man...
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ژورنال
عنوان ژورنال: Nature Reviews Genetics
سال: 2004
ISSN: 1471-0056,1471-0064
DOI: 10.1038/nrg1309