Search results for " emergence"

Effetti degli oli essenziali di agrumi applicati in post-emergenza sul controllo delle infestanti e sulla comunità microbica del suolo

2017

Sebbene gli erbicidi sintetici ad oggi siano il mezzo più utilizzato per il controllo delle erbe infestanti, è ampiamente dimostrato che essi hanno un impatto negativo sul suolo, sull'ambiente e, inoltre, iniziano a manifestarsi fenomeni di resistenza. Pertanto, è importante sviluppare mezzi alternativi che siano al contempo efficaci e rispettosi dell’ambiente. Gli olii essenziali estratti dalle piante sono stati da sempre utilizzati per molteplici usi come agenti battericidi, virucidi, fungicidi, insetticidi, medicinali e cosmetici. Diversi studi hanno dimostrato tali attività degli oli essenziali estratti dagli agrumi, ma scarsi sono gli studi che hanno investigato il loro potenziale uso …

Soil bioindicators and weed emergence as affected by essential oils extracted from leaves of three different Eucalyptus species

2017

The widespread use of synthetic herbicides has resulted in herbicide-resistant weeds, altered ecological balance and negative effects on human health. To overcome these problems, efforts are being made to reduce the reliance on synthetic herbicides and shift to natural products. Essential oils (EOs) extracted from plants have been demonstrated to have potential herbicide activity. EOs, composed by volatile organic compounds and characterized by a strong odor, are used in the cosmetic, pharmaceutical and food industries as they are thought to be safe compounds for humans, animals, and the environment. EOs extracted from Eucalyptus leaves have antimicrobial, antiviral, fungicidal, insecticida…

Human and Machine Perception 3, Thinking, Deciding, and Acting

2001

Cuerpos moldeables y vidas modulables: La invención del estado holísticamente saludable como bienestar (integral)

2020

The article argues ?from the Deleuzian concepts of society of control, moulding and modulation and the Rosean theory on the economization and medicalization of life? that the expansion of the concept of health in terms of integral and subjective well-being is the effect of a socio-historical shift in the way we relate to this signifier, and therefore to our bodies and ourselves. We use this interpretative network to analyze the effects that the biopsychosocial health paradigm has had in the context of aesthetic surgery and fitness practice. As a result, we see that the expansion of the concept of health has extended the domain of medicine into the spheres of personal care and physical appea…

Spin-1/2 sub-dynamics nested in the quantum dynamics of two coupled qutrits

2017

In this paper we investigate the quantum dynamics of two spin-1 systems, $\vec{\textbf{S}}_1$ and $\vec{\textbf{S}}_2$, adopting a generalized $(\vec{\textbf{S}}_1+\vec{\textbf{S}}_2)^2$-nonconserving Heisenberg model. We show that, due to its symmetry property, the nine-dimensional dynamics of the two qutrits exactly decouples into the direct sum of two sub-dynamics living in two orthogonal four- and five-dimensional subspaces. Such a reduction is further strengthened by our central result consisting in the fact that in the four-dimensional dynamically invariant subspace, the two qutrits quantum dynamics, with no approximations, is equivalent to that of two non interacting spin 1/2's. The …

Interactive Effects of Explicit Emergent Structure: A Major Challenge for Cognitive Computational Modeling

2015

International audience; David Marr's (1982) three-level analysis of computational cognition argues for three distinct levels of cognitive information processingnamely, the computational, representational, and implementational levels. But Marr's levels areand were meant to bedescriptive, rather than interactive and dynamic. For this reason, we suggest that, had Marr been writing today, he might well have gone even farther in his analysis, including the emergence of structurein particular, explicit structure at the conceptual levelfrom lower levels, and the effect of explicit emergent structures on the level (or levels) that gave rise to them. The message is that today's cognitive scientists …

Importance of seeds in the process of common ragweed invasion

2012

International audience; Ambrosia artemisiifolia L. (common ragweed) was introduced into Europe at the end of the 1900s and is now present in several European countries. This annual invasive plant produces seeds that are highly polymorphic. Common ragweed can produce only a few thousand highly viable seeds. Many studies have focused on the seed stage. Greater seedling emergence for the seeds placed near the soil surface could explain the success of this species in open habitats, where the probability of deeper burial is low. Emergence percentage was found to decrease as burial depth increased from 2 to 8 cm, and no germination nor seedling emergence was observed for the seeds buried from 10-…

The influence of infective dose, nutrient availability and coinfection on virulence of Flavobacterium columnare : implications of intensive aquacultu…

2016

Ecological factors are known to affect disease dynamics and even lead to disease emergence. Especially in opportunistic, environmentally transmitted pathogens, the environment may significantly contribute to pathogen virulence. Intensive farming, including aquaculture, has been suggested to create conditions favouring development of highly virulent pathogens. At Finnish fish farms, epidemics caused by opportunistic Flavobacterium columnare have been constantly increasing in their prevalence and severity since the 1980’s. Yet, factors behind the increased virulence of the pathogen and their mechanisms of action have largely remained unsolved. In this thesis, I explore the effects of infectio…

"Mutta niille ei voi mitään, joilla on aivoissa vika" : mielisairauden kansanomaiset tulkinnat 1900-luvun alkuvuosikymmenten modernisoituvassa Suomes…

2015

Artikkelissa tarkastellaan mielisairauden kansanomaisia tulkintoja 1900-luvun ensimmäisinä vuosikymmeninä, jolloin mielisairaita ja muita marginaaliryhmiä koskeva yhteiskunnallinen keskustelu kävi vilkkaana. Mielisairaat alkoivat degeneraatioteorioiden myötä näyttäytyä modernisoituvan yhteiskunnan ei- toivottuina toisina, joiden henkinen ja fyysinen rappio uskottiin perinnölliseksi. Mielisairaaloiden lukumäärää lisättiin, mutta merkittävä osa mielisairaiksi katsotuista eli yhä laitosten ulkopuolella, esimerkiksi elätteellä maaseudun yksityisissä perheissä. Artikkelissa selvitetään, miten mielisairaisiin suhtaudutaan aikakauden maallikkokerronnassa ja millaisia käsityksiä esitetään mielisair…

The Role of Leadership in Complex Strategic Networks: Enabling Effect Versus Emergence

2013

In today's knowledge-based economy, the sources of competitive advantage lie more and more in webs of interactions among a variety of actors (such as firms, universities, research organizations, government institutions and so on), that over time originate the emergence of strategic networks. The paper aims to shed light on the determinants of network interaction and the ensuing processes of knowledge and resource transfer and circulation, on which the networkbased sources of competitive advantage are rooted. Accordingly, by means of the adoption of the complexity system perspective, on the one hand, we underscore the emergent nature of network interactions stemming from the self-organizing …