نتایج جستجو برای: trade offs

تعداد نتایج: 98688  

Journal: :Evolution; international journal of organic evolution 2014
Jill T Anderson Cheng-Ruei Lee Thomas Mitchell-Olds

Fitness trade-offs across episodes of selection and environments influence life-history evolution and adaptive population divergence. Documenting these trade-offs remains challenging as selection can vary in magnitude and direction through time and space. Here, we evaluate fitness trade-offs at the levels of the whole organism and the quantitative trait locus (QTL) in a multiyear field study of...

Stream ciphers are an important class of symmetric cryptographic algorithms. The eSTREAM project contributed significantly to the recent increase of activity in this field. In this paper, we present a survey of the eSTREAM project. We also review recent time/memory/data and time/memory/key trade-offs relevant for the generic attacks on stream ciphers.

Journal: :Ecology 2011
Kyle F Edwards Christopher A Klausmeier Elena Litchman

Trade-offs among functional traits are essential for explaining community structure and species coexistence. While two-way trade-offs have been investigated in many systems, higher-dimensional trade-offs remain largely hypothetical. Here we demonstrate a three-way trade-off between cell size and competitive abilities for nitrogen and phosphorus in marine and freshwater phytoplankton. At a given...

Journal: :Evolution; international journal of organic evolution 2013
Stephanie S Porter Kevin J Rice

Specialization and concomitant trade-offs are assumed to underlie the non-neutral coexistence of lineages. Trade-offs across heterogeneous environments can promote diversity by preventing competitive exclusion. However, the importance of trade-offs in maintaining diversity in natural microbial assemblages is unclear, as trade-offs are frequently not detected in artificial evolution experiments....

Journal: :Environmental Health Perspectives 1996
D Taylor

P roteomics is defined as the protein complement of the genome and involves the complete analysis of all the proteins in a given sample [1,2]. Several technologies are involved, and numerous questions concerning the proteins are addressed. What proteins are contained in a biological sample? At what concentration do the proteins exist? How do protein expression levels alter in different samples?...

2007
Barry Sinervo

Behavioral ecology (Krebs 1987) has a rich tradition of calling tradeoffs a cost-benefit. We can synonymize cost-benefit analysis with the notion of a life history trade-off introduced in chapter 3, because in some cases even social system trade-offs have been linked to the pleiotropic effects of one gene on two or more traits. As we will see below, in greenbeard dynamics, which arise from thre...

2015
Giovani J.C. da Silveira

The analysis of trade-offs between competitive priorities is one of the core issues in manufacturing strategy research. However, past studies focused mainly on empirical validation of the trade-off concept. There has been limited research on practical aspects of trade-off management, especially methods for trade-off improvement and the incorporation of trade-off analysis into manufacturing stra...

Journal: :General and comparative endocrinology 2014
Elizabeth D Carlton Candace L Cooper Gregory E Demas

Most free-living animals have finite energy stores that they must allocate to different physiological and behavioral processes. In times of energetic stress, trade-offs in energy allocation among these processes may occur. The manifestation of trade-offs may depend on the source (e.g., glucose, lipids) and severity of energy limitation. In this study, we investigated energetic trade-offs betwee...

2013
Eric RIGAUD

This article describes the development of a prototype Resilience Analysis Grid for rail traffic management. The findings from testing of the initial model led to the identification of a set of potential vectors for improvement, in particular the need to integrate trade-offs. Based on Resilience Engineering trade-off theory this paper discusses how to integrate trade-offs into the system descrip...

2003
JAMES D. FRY

Theories of the evolution of niche breadth usually depend on the assumption that genotypes that are well adapted to exploit one habitat or resource are not well adapted to others. Such ‘‘trade-offs’’ are often apparent in interspecific comparisons, but have been harder to document at the within-population level. Selection experiments provide a promising means for detecting within-population tra...

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