Search results for "Rail"
showing 10 items of 699 documents
On the sway stability improvement of car–caravan systems by articulated connections
2015
The present analysis is addressed to some promising connection arrangements between the towing vehicles and the towed trailers, where the two units are linked by four-bar isosceles trapeziums in place of the conventional pintle hitch. Two types of instability, of the divergent type or the oscillating type, may be analysed by the Routh–Hurwitz criterion or by the direct analysis of the characteristic equation. The constant term of this equation vanishes at the divergent instability threshold (zero of a real root), whereas the equation splits into two lower degree algebraic ‘sub-equations’ when the oscillating instability arises (pair of pure imaginary roots). A large field of geometrical con…
Transportation noise and gestational diabetes mellitus: A nationwide cohort study from Denmark
2020
Background: Few studies have investigated whether road traffic noise is associated with gestational diabetes mellitus (GDM), and have yielded inconsistent findings. We aimed to investigate whether maternal exposure to residential transportation noise, before and during pregnancy, was associated with GDM in a nationwide cohort. Methods: From the Danish population (2004–2017) we identified 629,254 pregnancies using the Danish Medical Birth Register. By linkage with the National Patient Registry, we identified 15,973 pregnancies complicated by GDM. Road traffic and railway noise (Lden) at the most and least exposed façades for all residential addresses from five years before pregnancy until bi…
Family caregivers’ involvement in caring for frail older family members using welfare technology: a qualitative study of home care in transition
2022
Abstract Background Demographic, economic and organisational changes challenge home care services. Increased use of welfare technology and involvement of family members as co-producers of care are political initiatives to meet these challenges. However, these initiatives also involve ethical aspects. Method The aim of this qualitative study was to explore family caregivers’ experience of involvement and possible ethical aspects of caring for frail older family members receiving home care services supported by welfare technology. This study used a qualitative explorative and descriptive design within a phenomenological-hermeneutical approach. Sixteen interviews with eighteen family caregiver…
The two-track Europeanization of football: EU-level pressures, transnational dynamics and their repercussions within different national contexts
2012
This article contributes to the under-researched literature on the Europeanization of sports. We distinguish between two modes of Europeanization (broadly signifying the impact of European integration on the domestic realm): the traditional top-down approach and the neglected societal/transnational Europeanization track. Both modes are examined with regard to their effects within two national contexts (Germany and Austria), and across two cases: the Bosman ruling (the nationality issue) and European club competitions as an engine of Europeanization. Our analysis reveals some important differences: the domestic countermeasures regarding the nationality aspect of the Bosman ruling were more s…
Le vibrazioni in campo ferroviario: analisi f.e.m. dell’interazione convoglio-sovrastruttura-terreno
2003
This paper describes the formulation and application of a finite element method model that simulates the generation and propagation of train-induced vibrations into track-ground system. The F.E.M. model accounts for the interaction between ground, railway, shape of cross-section and train speed. The aim of this research is the evaluation of the influence of each factor on vibrational phenomena.
Fast Neural Machine Translation Implementation
2018
This paper describes the submissions to the efficiency track for GPUs at the Workshop for Neural Machine Translation and Generation by members of the University of Edinburgh, Adam Mickiewicz University, Tilde and University of Alicante. We focus on efficient implementation of the recurrent deep-learning model as implemented in Amun, the fast inference engine for neural machine translation. We improve the performance with an efficient mini-batching algorithm, and by fusing the softmax operation with the k-best extraction algorithm. Submissions using Amun were first, second and third fastest in the GPU efficiency track.
Emotional Distress of Patients at End-of-Life and Their Caregivers: Interrelation and Predictors
2018
Background: Patients at the end of life and their families experience a strong emotional impact. The well-being of these patients and that of their family caregiver are related. Aim: To study the variables related with the emotional well-being of patients with and without cognitive impairment at the end of life and that of their primary family caregivers. Design: Cross- sectional study. Participants: Data was collected from 202 patients at the end of life with different diagnosis (COPD, cancer, and frail elderly) as well as from their respective 202 primary family caregivers. Results: Structural equation models indicated that the emotional state of the patients was best predicted by their f…
Hong Kong’s EDI bandwagon Derailed or on the right track?
1997
In this paper we explore the adoption of a complex networked technology — that of Electronic Data Interchange (EDI) — in the context of Hong Kong. EDI forms a complex and interorganizational innovation and therefore we suggest a multi-theoretical framework to examine its diffusion. The framework takes into account institutional, industry specific and organizational factors in the study of diffusion processes and thus extends the analysis beyond organizational borders. Using the framework we deliver an account of the EDI diffusion in Hong Kong based on field study data. The study clarifies how simultaneous organizational, industry and environmental factors can be brought to bear to understan…
Principles of Calculation of Track Access Charges in Rail Freight Transport in Poland
2019
Non-discriminatory rules for access to the railway infrastructure as well as transparent pricing system are the essential factors of ensuring that the freight transport in Poland is competitive enough. Infrastructure managers pass some categories of their costs (e.g. for maintaining of railway infrastructure) on railway undertakings in the form of access charges verified andaccepted by the Polish regulatory body. In general, approximately one – third of their costs shall be paid by railway undertakings. Given that access charges are treated as one of the most important factors for both railway undertakings and railway infrastructure man-agers. The aim of this article is to review the main p…
A New Systematic Series of Foil Sections with Parallel Sides
2020
Parallel-sided foil sections are used for centerboards and rudders in sailing dinghy classes and also for struts placed in a fluid flow. The objective of this work is to create a systematic series of parallel-sided sections to be used under different conditions, with an emphasis on the sailing dinghies 470, 420 and Optimist. The loss, and surprisingly the gain, in performance relative to 4-digit NACA sections are also investigated. A 2D Reynolds-averaged Navier&ndash