Search results for "Function"

On hidden heterogeneity in directional asymmetry – can systematic bias be avoided?

2006

8 pages; International audience; Directional asymmetry (DA) biases the analysis of fluctuating asymmetry (FA) mainly because among-individual differences in the predisposition for DA are difficult to detect. However, we argue that systematic bias mainly results from predictable associations between signed right-left asymmetry and other factors, i.e. from systematic variation in DA. We here demonstrate methods to test and correct for this, by analysing bilateral asymmetry in size and shape of an irregular sea urchin. Notably, in this model system, DA depended significantly on body length and geographic origin, although mean signed asymmetry (mean DA) was not significant in the sample as a wh…

Sustainability and Meanings of Farm-Based Bioenergy Production in Rural Finland

2013

Ecosystem rescue : when protection is not enough

2015

Assessing past ecological changes in lake Isojärvi and its suitability as a Finnish lake reference site using sedimentary diatoms

2008

The Eco-tourist in Canadian and Italian national Parks

2013

The present paper aims to compare the image of the eco-tourist across languages and cultures, Canadian and Italian. An ad-hoc comparable corpus has been created from the official websites of National Parks which represent a kind of eco-tourist destination. The analysis attempts to trace a profile of Canadian and Italian eco-tourists Drawing upon the Functional Grammar (Halliday 1985) and addresses issues connected with Hall’s model (1983): Are Canadian and Italian ecotourism discourses shaped by their own cultural orientation, or do they attempt to speak in the tongue of the displaced tourist?

Asociación entre clima motivacional, ajuste escolar y funcionalidad familiar en adolescentes

2019

The present study seeks to define and contrast an explanatory model of motivational climate, school adjustment and family functioning, and to analyse the existing associations between the aforementioned variables through structural equation analysis. The sample includes 2,134 adolescents aged 12 to 18 years from the province of Granada. Motivational climate (PMCSQ-2), school adjustment (EBAE-10) and family functioning (APGAR) are analysed. A descriptive cross-sectional design is used and the program AMOS 23.0 is employed to construct the multi-group structural equation model. The model showed appropriate fit (χ2 = 241.34; df = 17; p < .001; CFI = .953; NFI = .950; IFI = .953; RMSEA = .079).…

Anagraphical relationships and crime specialization within Cosa Nostra

2021

Abstract The aim of the present work is to investigate the relationships established within Cosa Nostra, by making use of networks and complex-systems methods. The analysis is performed at three different levels, that is, individuals, groups within mafia syndicates, and relationships amongst mafia syndicates. The reported empirical analysis is based on the criminal records of 632 affiliates to Cosa Nostra selected from a set of 125 judgements emitted by the Palermo courts from 2000 to 2014. According to the criminal records of the Palermo Prosecutor Office, such a dataset includes approximately 10% of the whole population of Cosa Nostra affiliates in western Sicily. Furthermore, the vital s…

On the intrinsic population of the lowest triplet state of uracil

2007

Abstract From CASPT2//CASSCF quantum-chemical computations it is determined that the lowest triplet state of uracil can be efficiently populated from the initially activated singlet manifold through respective singlet–triplet crossings of the singlet state with the low-lying 3nπ∗ state at 4.6 eV and with the lowest 3ππ∗ state at 4.2 eV located along the minimum energy path of the low-lying 1ππ∗ state. Large spin–orbit coupling elements predict, in particular for the former case, efficient intersystem crossing processes. The wavelength dependence measured for the triplet quantum yield can be explained by the location of the singlet–triplet crossing regions.

Calculate Pulse from Touch Error Free PPG Signal with 2ndOrder Butterworth Filter

2021

With the ongoing heart problems of the population worldwide, the medical requirements of the people are expected to increase. Electrocardiogram (ECG) is one of the proven to capture the heart response signal to assess the electrical and muscular functions of the heart. The ECG setup is expensive and needs proper training, and of course, it is not instant. For fast, accurate heart parameter monitoring, scientists pay attention to the photoplethysmogram signal (PPG), based on the light intensity of a particular wavelength. Android smartphone with a good quality camera has come to ordinary people's reach and has become one of the most necessary and rugged devices for today and future generatio…

On determining unknown functions in differential systems, with an application to biological reactors.

2003

In this paper, we consider general nonlinear systems with observations, containing a (single) unknown function φ . We study the possibility to learn about this unknown function via the observations: if it is possible to determine the [values of the] unknown function from any experiment [on the set of states visited during the experiment], and for any arbitrary input function, on any time interval, we say that the system is “identifiable”. For systems without controls, we give a more or less complete picture of what happens for this identifiability property. This picture is very similar to the picture of the “observation theory” in [7]: Contrarily to the case of the observability property, i…