Search results for "RANSAC"

SIMSISAK – a Method to Model Nuclide Transport in the SISAK System

2019

A computer model that calculates the transport yield of a nuclide through an arbitrary SISAK experimental set-up has been developed. The model is intended to be used for two types of calculations connected to chemical studies of the heaviest elements. If the production cross section and the nuclide half-life are known, it can be used to estimate the number of decay events to be expected at the detection site. Consequently, if the number of atoms decaying in the detection cells is known, it can be used to estimate the production cross section or the half-life, provided that one of these properties is known.

Application of fast solvent extraction processes to studies of exotic nuclides

1998

Fast solvent extraction is a chemical separation method, which can be applied to study exotic nuclides. Since about 1970 the SISAK technique, which is an on-line method based on multi-stage solvent extraction separations, has been successfully used to investigate the nuclear properties of β-decaying nuclides with half-lives down to about one second. During the last decade it has become possible to produce transactinide elements in high enough yields to investigate their chemical properties on a one-atom-at-a-time scale. For this purpose it was necessary to improve and change the detection part of the SISAK system in order to be capable to detect spontaneously fissioning and α-decaying nucli…

Child-centered and teacher-directed practices in relation to calculation and word problem solving skills

2019

Abstract This study examined transactional associations between classroom-level math skills and teaching practices. Participants were 523 children from 31 classrooms. Math skills were assessed three times. Teaching practices were observed in Grades 1 and 3. Child-centered practices promoted subsequent calculation skills whereas teacher-directed practices were associated with a lower level of calculation skills. Higher problem-solving skills at Grade 2 predicted more child-centered practices and less teacher-directed practices in third grade. Moreover, calculation skills mediated the effect of child-centered practices on problem-solving skills. The results suggest that teaching practices and…

The Paradox of Effectiveness: Growth, Institutionalisation and Evaluation of Anti-Mafia Policies in Italy

2004

This contribution focuses on Italian policies that have been envisaged and implemented to combat, prevent or contain mafia-type organised crime.1 After having shown that a proper analysis of anti-mafia policies is strangely lacking (section 2), policies directly addressing the mafia are dealt with, hinting at the norms concerning specific criminal offences, vast investigatory powers and penetrating preventive measures, financial transactions and money laundering, collaborators of justice, the peculiarity of mafia trials, judicial attitudes and sanctions (section 3.1). Section 3.2 presents the wide variety of other policies addressing civil society and public administrations, and only indire…

Supporting Dispute Handling in E-Commerce Transactions, a Framework and Related Methodologies

2004

An E-commerce transaction is a means to conduct particular commercial activities using the global digital E-commerce infrastructure. We concentrate here on business to customer (B-to-C) E-commerce transactions. These transactions are based on protocols offered by the global infrastructure, primarily the Internet. Using electronic means to do business can greatly improve the efficiency of the business transactions. It, however, poses some problems that were rarely considered to be important before. One class of problems is caused by the behavior of untrusted participants. For reasons such as dishonesty, disputes may arise. In the general case, when a dispute arises an untrustworthy participa…

Distributed pedagogical leadership in support of student transitions

2012

This article examines how, through uncovering collaborative leadership, the whole school staff is able to understand its common endeavours to support heterogeneous students’ fluent learning paths. For this, a notion of distributed pedagogical leadership (DPL) is drawn upon. DPL concerns everyone in the school community, not only leaders and management. It means abandoning role, instrumental or process centricity and moving towards leadership that is characterized as the innermost qualities of a professional learning community. This kind of leadership is best described with 10 ‘keys’ as 10 key attributes. To understand DPL in practice, quantitative data both from a nationwide Finnish survey…

The Idiosincrancies of the European M&A Market

2020

This paper provides a comprehensive descriptive analysis of the European market of mergers and acquisitions (MA 2) method of payment; 3) geographical scope; 4) target’s attitude; 5) bidders’ competition; 6) industry relatedness; 7) public status of the firms involved; and 8) acquirers’ ownership of targets before and after the transaction. Additionally, we identify the similarities and differences of this market with those of the dominant market worldwide, namely the US. Both markets show similar trends in their activity and the occurrence of waves concentrated around economic shocks. However, the European market notably exhibits higher levels of friendly and cash deals.

Liquid-phase Chemistry

2003

Dynamic 3D Scene Reconstruction and Enhancement

2017

International audience; In this paper, we present a 3D reconstruction and enhancement approach for high quality dynamic city scene reconstructions. We first detect and segment the moving objects using 3D Motion Segmenta-tion approach by exploiting the feature trajectories' behaviours. Getting the segmentations of both the dynamic scene parts and the static scene parts, we propose an efficient point cloud registration approach which takes the advantages of 3-point RANSAC and Iterative Closest Points algorithms to produce precise point cloud alignment. Furthermore, we proposed a point cloud smoothing and texture mapping framework to enhance the results of reconstructions for both the static a…

Persistent software transactional memory in Haskell

2021

Emerging persistent memory in commodity hardware allows byte-granular accesses to persistent state at memory speeds. However, to prevent inconsistent state in persistent memory due to unexpected system failures, different write-semantics are required compared to volatile memory. Transaction-based library solutions for persistent memory facilitate the atomic modification of persistent data in languages where memory is explicitly managed by the programmer, such as C/C++. For languages that provide extended capabilities like automatic memory management, a more native integration into the language is needed to maintain the high level of memory abstraction. It is shown in this paper how persiste…