Is Counting One's Chickens Before They Are Hatched an Inevitable Ending?

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Counting chickens before they hatch: reciprocal consistency of calibration points for estimating divergence dates

There has been concern in the literature about the methodology of using secondary calibration timepoints when estimating evolutionary divergence dates. Such timepoints are divergence time estimates that have been derived from one molecular data set on the basis of a primary external calibration timepoint, and which are then used independently on a second data set. Logically, the primary and sec...

متن کامل

Counting your sperm before they fertilize: are sperm counts really declining?

A purported global decline in sperm counts has been a source of controversy since the early 1990s. Numerous studies performed since then, as well as reanalysis of the original data, show either no changes, or even increases, in sperm concentrations over time. In this review, we discuss the 1992 meta-analysis that initiated the continuing debate on whether sperm concentrations are declining, and...

متن کامل

Counting Ones Without Broadword Operations

A lower time bound Ω(min(ν(x), n − ν(x)) for counting the number of ones in a binary input word x of length n corresponding to the word length of a processor architecture is presented, where ν(x) is the number of ones. The operations available are increment, decrement, bit-wise logical operations, and assignment. The only constant available is zero. An almost matching upper bound is also obtained.

متن کامل

Nimbers are inevitable

This article concerns the resolution of impartial combinatorial games, and in particular games that can be split in sums of independent positions. We prove that in order to compute the outcome of a sum of independent positions, it is always more efficient to compute separately the nimbers of each independent position than to develop directly the game tree of the sum. The concept of nimber is th...

متن کامل

Are Crises Inevitable?

Recessions and other crises seem to occur without any large exogenous shocks. One theory is that this is due to strategic complementarities: the incentive to invest is stronger if others are expected to invest. If, in addition, each investor observes a slightly noisy signal of the true fundamentals, a crisis occurs whenever fundamentals fall below a certain threshold (Morris and Shin, AER 1998)...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: JACC: Heart Failure

سال: 2017

ISSN: 2213-1779

DOI: 10.1016/j.jchf.2016.09.011