Search results for "ROV"
showing 10 items of 5770 documents
Conversion of existing roundabouts into turbo-roundabouts: case studies from real world, Journal of Civil Engineering and Architecture 6(8)
2012
Compared with roundabouts the main advantages of turbo-roundabouts are the reduction in the number of potential conflicting points and the lower speed of vehicles through the intersection; they both can improve road safety conditions at the junction. Moreover, the physical delimitation among lanes limits the side-by-side accident risk. These aspects make turbo-roundabouts more appropriate than roundabouts when a higher level of safety has to be guaranteed, particularly in presence of relevant pedestrian and two-wheels traffic volumes. The present paper has three main objectives : 1) to discuss general design criteria and functional principles of turbo roundabouts; 2) to give the geometric d…
TURBO-ROUNDABOUT GENERAL DESIGN CRITERIA AND FUNCTIONAL PRINCIPLES: CASE STUDIES FROM REAL WORLD
2010
Compared with usual roundabouts the main advantages of turbo-roundabouts are the reduction in the number of potential conflicting points and the lower speed of passing vehicles through the intersection; they both can improve road safety conditions at the junction. Also, the physical delimitation among lanes limits the side-by-side accident risk. These aspects make turbo-roundabouts more appropriate than roundabouts when a higher level of safety has to be guaranteed, particularly in presence of relevant pedestrian and two-wheels traffic volumes. In a previous paper authors proposed a theoretical approach to evaluate turbo-roundabouts capacity founded on gap acceptance theory. In particular, …
Safety diagnostic method in urban circular intersections
2004
The available knowledge of traffic safety at roundabouts is not a complete reference for geometric design; where there are organizational schemes for junctions characterized by a geometric design, quite different driving behaviours are required from those that are observable at roundabouts. This is very frequent in urban areas, where the existing constraints, particularly physical ones, often render it necessary to make “compromise choices” relating to one or more geometric features of the roundabout (central island shape, circulatory roadway width, symmetry and number of the arms, entry width, etc). The objective of this study is to explain the accident phenomenology of this kind of road s…
An Italian experience on crash modeling for roundabouts
2015
In the last few years a considerable amount of safety models and evaluation tasks have been developed and specifically dedicated to roundabouts. Several safety performance functions (SPFs), indeed, have been implemented for roundabouts worldwide. Since SPFs are developed using crashes, traffic volume and other characteristics of a specific site (or geographical area), their direct transferability to other contexts different from those in which SPFs were calibrated is not always possible and, in any case, it must be done very carefully. A safety performance function cannot be used without a transferability evaluation for sites not included in the geographic area for which it was developed. S…
Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts
2019
Insoluble rust waste from the scraping of rusted iron-containing materials represents a cheap, eco-friendly, and available source of iron. LaFeO3 perovskite-type powders were successfully prepared by solution combustion synthesis using rust waste from an electricity transmission tower manufacturer. Solution combustion synthesis enabled introduction of this insoluble iron precursor directly into the final product, bypassing complex extraction procedures. Catalytic activity in the propylene oxidation of the waste-derived LaFeO3 with stoichiometric Fe/La ratio was almost identical to the commercial iron nitrate-derived LaFeO3 , thus demonstrating the viability of this recycling solution. The a…
Kehollinen vuorovaikutus psykoterapiassa
2018
Tässä artikkelissa tarkastellaan psykoterapiaa kehollisena kohtaamisena ja kokemuksena. Artikkelissa esitellään tutkimustuloksia psykoterapian aikaisesta sanattomasta vuorovaikutuksesta ja pohditaan kehollisuuden merkitystä psykoterapiassa. Artikkelin pääsanoma on, että sanaton vuorovaikutus on keskeistä psykoterapiassa ja terapeutin tulee tiedostaa oma osallisuutensa sanattoman yhteistyösuhteen muodostumisessa. Terapeutin sanaton viestintä vaikuttaa empatian välittymiseen ja mahdollisesti jopa terapian vaikuttavuuteen. Myös terapeutti vaikuttuu terapian tunnesisällöistä ja tapahtumista sanattomalla tasolla. peerReviewed
Bodily Practices in Action Formation and Ascription in Multilingual Interaction: Introduction to the Special Issue.
2022
This special issue brings together empirical studies that investigate how bodily practices feature in action formation and action ascription in multilingual interaction (Schegloff, 2007; Levinson, 2013). Grounded in video-based conversation analysis and drawing on data from diverse sociomaterial settings, the articles investigate the contingent interactional processes through which speakers from different language backgrounds accomplish actions and achieve intersubjectivity. They demonstrate how specific constellations of linguistic resources, bodily conduct, spatial configurations, and material ecology are built into accomplishment of actions at different levels of interactional organizati…
Katsaus ryhmän vuorovaikutuksen analysointimenetelmiin
2011
Ryhmän vuorovaikutuksen tutkimukseen on kehitetty useita analysointimenetelmiä, joiden tavoitteena on kuvata, ymmärtää ja selittää ryhmän jäsenten välistä vuorovaikutusta ja ryhmän vuorovaikutusprosesseja. Tunnetuimpia lienevät keskusteluanalyysi (ks. esim. Heritage 1997; Peräkylä 1995) ja Balesin (1951) vuorovaikutuksen prosessianalyysi (IPA). Tämän kirjallisuuskatsauksen tavoitteena on jäsentää ja arvioida, millaisia ryhmän vuorovaikutuksen havainnointiin perustuvia analyysimenetelmiä on käytetty tehtäväkeskeisten ryhmien ja tiimien tutkimuksessa vuosina 1999–2009. Artikkeli pohjautuu systemaattiseen tiedonhakuun, joka keskittyi tärkeimpiin puheviestinnän ja lähitieteiden artikkelitietoka…
Musisointi ryhmäyttämisen välineenä
2017
Tässä tutkimuksessa perehdytään musisoinnin käyttöön ryhmäyttämisen välineenä. Ryhmäyttämisellä tarkoitetaan toiminnallisten menetelmien käyttöä ryhmän turvallisuuden lisäämiseen tähtäävässä prosessissa (Aalto 2000). Musisointi on osanottamista musiikilliseen toimintaan. Se on sosiaalinen tapahtuma, joka kertoo suhteistamme, ja siitä, keitä me olemme. (Small 2011.) Tutkimusstrategiani on laadullinen toimintatutkimus. Perustelen teoriakirjallisuuden pohjalta, miksi musiikki olisi toimiva ryhmäytysväline, ja hahmottelen musiikilliselle ryhmäytystoiminnalle periaatteita, joita testaan toimintatutkimuksellisessa interventiossa. Kokeilemisen, havainnoinnin ja reflektoinnin kautta pyrin löytämään…
The evolution and ecology of multiple antipredator defences
2023
Prey seldom rely on a single type of antipredator defence, often using multiple defences to avoid predation. In many cases, selection in different contexts may favour the evolution of multiple defences in a prey. However, a prey may use multiple defences to protect itself during a single predator encounter. Such “defence portfolios” that defend prey against a single instance of predation are distributed across and within successive stages of the predation sequence (encounter, detection, identification, approach (attack), subjugation and consumption). We contend that at present, our understanding of defence portfolio evolution is incomplete, and seen from the fragmentary perspective of speci…