Search results for "adaptation"
showing 10 items of 1775 documents
Cross-Sensor Adversarial Domain Adaptation of Landsat-8 and Proba-V images for Cloud Detection
2021
The number of Earth observation satellites carrying optical sensors with similar characteristics is constantly growing. Despite their similarities and the potential synergies among them, derived satellite products are often developed for each sensor independently. Differences in retrieved radiances lead to significant drops in accuracy, which hampers knowledge and information sharing across sensors. This is particularly harmful for machine learning algorithms, since gathering new ground truth data to train models for each sensor is costly and requires experienced manpower. In this work, we propose a domain adaptation transformation to reduce the statistical differences between images of two…
Nonlinearities and Adaptation of Color Vision from Sequential Principal Curves Analysis
2016
Mechanisms of human color vision are characterized by two phenomenological aspects: the system is nonlinear and adaptive to changing environments. Conventional attempts to derive these features from statistics use separate arguments for each aspect. The few statistical explanations that do consider both phenomena simultaneously follow parametric formulations based on empirical models. Therefore, it may be argued that the behavior does not come directly from the color statistics but from the convenient functional form adopted. In addition, many times the whole statistical analysis is based on simplified databases that disregard relevant physical effects in the input signal, as, for instance…
Bifurcation analysis of a TaO memristor model
2019
This paper presents a study of bifurcation in the time-averaged dynamics of TaO memristors driven by narrow pulses of alternating polarities. The analysis, based on a physics-inspired model, focuses on the stable fixed points and on how these are affected by the pulse parameters. Our main finding is the identification of a driving regime when two stable fixed points exist simultaneously. To the best of our knowledge, such bistability is identified in a single memristor for the first time. This result can be readily tested experimentally, and is expected to be useful in future memristor circuit designs.
Hierarchical Gompertzian growth maps with application in astrophysics
2010
The Gompertz model describes the growth in time of the size of significant quantities associated to a large number of systems, taking into account nonlinearity features by a linear equation satisfied by a nonlinear function of the size. Following this scheme, we introduce a class of hierarchical maps which describe discrete sequences of intermediate characteristic scales. We find the general solutions of the maps, which account for a rich set of possible phenomena. Eventually, we provide an important application, by showing that a map belonging to the class so introduced generates all the observed astrophysical length and mass scales.
A longitudinal test of the effects of Facebook use on cultural adaptation
2015
The present study is a longitudinal examination of the role of Facebook on the cultural adaptation of Muslim immigrants to the United States (n = 379). Immigrants’ use of Facebook affects interactions with the dominant culture and with the ingroup. Respondents were asked about their use of Facebook, motivation to culturally adapt, and perceptions of the US at two different points in a 6-year period. Analysis revealed the following. Muslim immigrants to the US from 2006 to 2012 who used Facebook more for social interaction with the ingroup were less likely to be motivated to culturally adapt to the US dominant culture and these same immigrants were more likely to have a negative perception o…
PRODUCTION FLEXIBILITY AND ADAPTING TO MARKET CHANGES
2007
Abstract This paper describes those situations when a company, an organization, in its search for minimum costs, including those involved by investment, and production flexibility, manages to adapt to those changes that ensure survival on the market. Economies of scale are an attraction for any firm and thus globalized, huge firms emerge, conquering continuously developing markets. However, smaller firms face market changes that are usually dangerous in terms of sustainability. The paper highlights those market components that provide information on adapting production through flexibility.
Adaptation of the Body Image after Breast Cancer Questionnaire in the Polish context: factorial structure and validity of the scale
2016
<b>Background</b><br /> Valid assessment of body image is salient in therapy and rehabilitation of women suffering from breast cancer. Adequate instruments are still lacking in this domain. To overcome this limitation two aims were formulated in the study. First, we tested the factorial structure of the Body Image after Breast Cancer Questionnaire (BIBCQ) developed by Baxter (1998) in Canada, in the Polish context. Then, we tested the construct validity of the scale. The scale is based on a multidimensional concept of the body image of chronically ill individuals proposed by Vamos (1993).<br /> <br /> <b>Participants and procedure</b><br /> A …
The Multi-States (MuSt) Theory for Emotion- and Action-regulation in Sports
2020
Feeling states – including emotional experiences – are fundamental to human adaptation, as they influence effort, attention, decision making, memory, and behavioural responses of individuals, as well as their interpersonal interactions. Thus, the ability to self-regulate is crucial for athletic success. This chapter presents the multi-states (MuSt) theory as a holistic approach for both emotion- and action-centred self-regulation for performance enhancement and optimisation. Central to the MuSt theory is the notion that a combination of emotion- and action-regulation strategies is more effective than focusing on one aspect alone. In this chapter, we describe psychobiosocial feeling states a…
Temperature Adaptation Markedly Determines Evolution within the Genus Saccharomyces
2011
12 pages, 7 figures, 3 tables
The effect of composite resin preheating on marginal adaptation of class II restorations
2020
Background One of the problems with a high filler content composite resins is gap formation at restorative material-tooth interface. The present study investigated the effect of preheating composite resins on the formation of marginal gap in Cl II restorations. Material and Methods In this in vitro study Sixty Cl II cavities were prepared on the mesial and distal surfaces of 30 extracted premolar teeth. The gingival floor of cavities was placed 1 m below the CEJ. The samples were randomly allocated to 4 groups for restoration placement: group 1, Filtek P60 composite resin at room temperature; group 2, Filtek P60 composite resin at 68°C; group 3, X-tra fil composite resin at room temperature…