Search results for "HM"

Mechanistic Study of Stepwise Methylisocyanide Coupling and C-H Activation Mediated by a Low-Valent Main Group Molecule

2013

An experimental and DFT investigation of the mechanism of the coupling of methylisocyanide and C–H activation mediated by the germylene (germanediyl) Ge(ArMe6)2 (ArMe6 = C6H3-2,6(C6H2-2,4,6-Me3)2) showed that it proceeded by initial MeNC adduct formation followed by an isomerization involving the migratory insertion of the MeNC carbon into the Ge–C ligand bond. Addition of excess MeNC led to sequential insertions of two further MeNC molecules into the Ge–C bond. The insertion of the third MeNC leads to methylisocyanide methyl group C–H activation to afford an azagermacyclopentadienyl species. The X-ray crystal structures of the 1:1 (ArMe6)2GeCNMe adduct, the first and final insertion produc…

Enhancing identification of causal effects by pruning

2018

Causal models communicate our assumptions about causes and effects in real-world phe- nomena. Often the interest lies in the identification of the effect of an action which means deriving an expression from the observed probability distribution for the interventional distribution resulting from the action. In many cases an identifiability algorithm may return a complicated expression that contains variables that are in fact unnecessary. In practice this can lead to additional computational burden and increased bias or inefficiency of estimates when dealing with measurement error or missing data. We present graphical criteria to detect variables which are redundant in identifying causal effe…

Bodily expressions of dominance in children's reasoning : an analysis of multimodal and sociometric data

2015

This case study explores how two Hungarian children argue for their choices in a decision- making task in which they were asked to pick objects useful on a deserted island. The study involves an analysis of the multimodal data of the video-recorded tasks, carried out as pair-work, and sociometric background data that were collected in order to build an initial understanding of the participants’ social relations. The aim of the study is to discover how dominance relations manifest in bodily acts during reasoning. Results show that dominance was expressed by specific embodied strategies such as by taking away objects or replacing them, and that the bodily gestures were closely intertwined wit…

The development of Early Mathematical Skills – A Theoretical Framework for a Holistic Model

2019

This article presents a theoretical framework for a holistic model of the development of early mathematical skills in early childhood education. The first aim of this study was to conduct a comprehensive international review of the literature to explore early mathematical skills categories. The literature review yielded three early mathematical skills categories, namely (1) numerical skills, (2) spatial thinking skills and (3) mathematical thinking and reasoning skills. Previous studies have shown that several mathematical skills develop gradually and simultaneously in early ages and that these skills areas are interconnected in mathematical skills learning. Accordingly, the second aim of t…

Organizational Decision Making: The Luhmannian Decision Communication Perspective

2014

Studies of organizational communication around decision-making and decision communication have largely concerned how decisions should be made and promoted. Less efforts have focused on how decisions should be communicated inside organizations and how they influence organizational effectiveness and performance. This study examined decision communication in an engineer-based organization 2008–2009. Key findings demonstrate that effective decision communication can be considered as the backbone of organizational communication, which can benefit the whole organization from the top management to lower levels. This paper also discussess the concept of decision communication generally and from the…

Postulat de lege frenda w zakresie przestępstwa obcowania płciowego z małoletnim

2023

Treść artykułu dotyczy problematyki regulacji przestępstwa obcowania płciowego z małoletnim z art. 200 § 1 Kodeksu karnego. W tym zakresie stwierdzono pewną niepełność w aktualnej regulacji, identyfikując ją oraz podając rozwiązanie w postaci propozycji, tj. znowelizowania art. 200 k.k. przez dodanie do niego § 2, który opisywałby to przestępstwo w ramach quasi-typu uprzywilejowanego jako wypadek mniejszej wagi. Sformułowanie niniejszego rozwiązania stanowi ocenę aktualnego stanu prawnego przez zwrócenie uwagi na potrzebę zmiany uregulowania prawnego w tym zakresie

Despidos laborales. Fracturas sociales e identitarias

2008

Los varios miles de despidos colectivos que han inaugurado el comienzo de siglo en España no suponen solo casi doscientos mil empleos destruidos, muchos de ellos con una larguísima vigencia, otros tantos proyectos de vida quebrados, sino también formas de reproducción social, de identidad rotas, instituciones y garantías sociales que se desmoronan. Sorprendentemente, estas fracturas sociales quedan eclipsadas con frecuencia tras unos discursos que apelan a los imperativos económicos, a las exigencias de la modernización, a los requerimientos de la lógica de la globalización. En el presente artículo se indagan las consecuencias del quebranto de la vinculación social entretejida en la segunda…

Radiofrequency and 2.45 GHz electron cyclotron resonance H− volume production ion sources

2016

The volume production of negative hydrogen ions (H-) in plasma ion sources is based on dissociative electron attachment (DEA)to rovibrationally excited hydrogen molecules(H2), which is a two-step process requiring both, hot electrons for ionization, and vibrational excitation of the H2 and cold electrons for the H- formation through DEA. Traditionally H- ion sources relying on the volume production have been tandem-type arc discharge sources equipped with biased filament cathodes sustaining the plasma by thermionic electron emission and with a magnetic filter separating the main discharge from the H- formation volume. The main motivation to develop ion sources based on radiofrequency (RF) o…

Harkinnanvaraiset rahoitusavustukset ja kuntien budjettirajoite Suomessa 1999-2004

2006

Spatial variability of dry spells duration statistical distributions

2014

Dry spells duration and its extent in space, is a key factor in water resources problems. In order to modelling the empirical distribution of dry spells (DS) frequencies observed in Sicily (i.e. in a typical Mediterranean climate), Agnese et al. (2014) successfully applied the two-parameter polylogarithm-series distribution. Because of the strong seasonality characterising Sicily’s rainfall regime, statistical analysis was separately applied to two data sets, referred to as “dry” and “wet” seasons, respectively. In this work, a similar analysis was carried out for a set of 26 DS time-series recorded in a large area (about 30000 km2), including Piedmont and the Aosta Valley. Area altitude ra…