Search results for "Transit"
showing 10 items of 4210 documents
Cleavage of Ge–Ge and Sn–Sn Triple Bonds in Heavy Group 14 Element Alkyne Analogues (EAriPr4)2 (E = Ge, Sn; AriPr4 = C6H3-2,6(C6H3-2,6-iPr2)2) by Rea…
2016
The reactions of heavier group 14 element alkyne analogues (EAriPr4)2 (E = Ge, Sn; AriPr4 = C6H3-2,6-(C6H3-2,6-iPr2)2) with the group 6 transition-metal carbonyls M(CO)6 (M = Cr, Mo, W) under UV irradiation resulted in the cleavage of the E–E triple bond and the formation of the complexes {AriPr4EM(CO)4}2 (1–6), which were characterized by single crystal X-ray diffraction as well as by IR and multinuclear NMR spectroscopy. Single-crystal X-ray structural analyses of 1–6 showed that the complexes have a nearly planar rhomboid M2E2 core with three-coordinate group 14 atoms. The coordination geometry at the group 6 metals is distorted octahedral formed by four carbonyl groups as well as two br…
The amateur astronomer Anders Hellant and the plight of his observations of the transits of Venus in Tornio, 1761 and 1769
2013
Anders Hellant was a versatile Swedish amateur scientist whose figure dominated eighteenth century intellectual life in Tornio, his little home town of some 500 inhabitants at the mouth of the Tornio river. My study is mainly based on the biographies published in Finnish (Bostr¨om 1918) and in Swedish (Tob´e 1991) but I have also consulted some original sources in Paris and in Stockholm. Hellant incarnated almost all by himself the inquiring scientific spirit of the Age of Enlightenment in Swedish Lapland. There is much to be said about his life and works, but here I focus on his observations of the Venus passages in 1761 and 1769. peerReviewed
IEA EBC Annex83 Positive Energy Districts
2021
At a global level, the need for energy efficiency and an increased share of renewable energy sources is evident, as is the crucial role of cities due to the rapid urbanization rate. As a consequence of this, the research work related to Positive Energy Districts (PED) has accelerated in recent years. A common shared definition, as well as technological approaches or methodological issues related to PEDs are still unclear in this development and a global scientific discussion is needed. The International Energy Agency’s Energy in Buildings and Communities Programme (IEA EBC) Annex 83 is the main platform for this international scientific debate and research. This paper describes the challeng…
Heritage, urbanity and transition: methods and tools for a possible future.
2021
It has taken millennia to provide our world with works of art that are sometimes comparable in magnificence and character to natural creation. Some civilizations of the past, without having any of our means, have created a historical heritage of infinite beauty. The literature on heritage and memory reports that heritage exists because society attests that an artifact, event, or place is so valuable that it is handed down to the next generation. Heritage is our anchor and beauty will save us. Architects, historians and geographers have argued that the concepts of heritage and memory are socially constructed, they shape cities and influence their identity. In the current metamorphosis, how t…
Elämän käännekohdat
1998
Äitien luottamuksen rakentuminen kasvattajiin varhaiskasvatuksen aloituksessa
2020
Vanhempien ja kasvattajien kasvatusyhteistyön sujuvuus heijastuu siihen, millaiseksi varhaiskasvatuksen aloitus muodostuu lapsen kokemuksena. Parhaimmillaan yhteistyön alkuvaihe tukee luottamuksen rakentumista vanhempien ja kasvattajien välille. Tässä artikkelissa kiinnostus kohdistuu luottamuksen rakentumisen prosessiin äitien näkökulmasta. Tarkastelemme miten luottamus kasvattajiin varhaiskasvatuksen instituutiossa rakentuu äitien puheessa heidän pohtiessaan lapsensa ensi kuukausia varhaiskasvatuksessa. Teoriasidonnaisen sisällönanalyysin tuella tutkimme, onko puheesta löydettävissä Rempelin, Holmesin ja Zannanin (1985) kuvaamia luottamuksen rakentumisen tasoja. Aineistona ovat viiden noi…
Relational approach to infant-teacher lap interactions during the transition from home to early childhood education and care
2022
The transition from home care to early childhood education and care (ECEC) is a period of intense change and development in young children's socio-spatial worlds. This article focuses on infant–teacher lap interactions during this transition period. This investigation applies a relational approach to the study of infant–teacher lap interactions. In doing so, it highlights the inherently social and contextual nature of interaction. From a relational perspective, actors, context, and situation are seen as constitutive of each other, and their interrelationality is considered central to the emergence of interactions. The data, regarding infants' first months attending ECEC in Finland, is compo…
Stabilise, balance and adjust : Framing the early years transitions of children whose parents work non‐standard hours
2022
This study examined talk by parents about the early years transitions of their children (n = 7) in the context of parental non-standard working hours and Finnish early childhood education and care (ECEC) services. Parents were interviewed at three time points: when their child was aged one, four, five or six years (a total of 21 interviews). The third interview was conducted during the COVID-19 pandemic. This article focuses on the children's ECEC transitions and the interpretative frames used by parents when talking about their work and childcare. The frames used by the parents to discuss the children's transitions were stabilising the children's lives, balancing between staying at home an…
La selecció de l'auxiliar en els verbs intransitius del català antic : alguns aspectes descriptius i explicatius
2021
En aquest article demostrem que, si es tenen en compte les principals idees de l'enfocament descriptiu de Sorace (2000, 2004) sobre la selecció de l'auxiliar, es pot donar compte de manera força natural d'algunes de les principals aportacions que fa Batlle (2002) per al català antic. Així, per exemple, és un fet esperable que els verbs estatius i els verbs esdevenimentals siguin els primers a admetre la substitució de l'auxiliar ésser per haver, ja que són precisament aquests verbs els que ocupen una posició intermèdia en l'anomenada jerarquia de la selecció d'auxiliar. Es demostra també que les línies de tall entre les classes lexicosemàntiques implicades en la selecció de l'auxiliar es fi…
Patterns of action transitions in online collaborative problem solving : A network analysis approach
2022
AbstractIn today’s digital society, computer-supported collaborative learning (CSCL) and collaborative problem solving (CPS) have received increasing attention. CPS studies have often emphasized outcomes such as skill levels of CPS, whereas the action transitions in the paths to solve the problems related to these outcomes have been scarcely studied. The patterns within action transitions are able to capture the mutual influence of actions conducted by pairs and demonstrate the productivity of students’ CPS. The purpose of the study presented in this paper is to examine Finnish sixth graders’ (N = 166) patterns of action transitions during CPS in a computer-based assessment environment in w…