Concept

Spiral

Related publications (29)

On the distribution of the cold neutral medium in galaxy discs

The cold neutral medium (CNM) is an important part of the galactic gas cycle and a precondition for the formation of molecular and star-forming gas, yet its distribution is still not fully understood. In this work, we present extremely high resolution simu ...

OXFORD UNIV PRESS2023

From starburst to quenching: merger-driven evolution of the star formation regimes in a shell galaxy

Jonathan Erik Peter Petersson

Shell galaxies make a class of tidally distorted galaxies, characterized by wide concentric arc(s), extending out to large galactocentric distances with sharp outer edges. Recent observations of young massive star clusters in the prominent outer shell of N ...

OXFORD UNIV PRESS2022

Estimating the non-dimensional energy of vortex rings by modelling their roll-up

Karen Ann J Mulleners

The non-dimensional energy of starting vortex rings typically converges to values around 0.33 when they are created by a piston-cylinder or a bluff body translating at a constant speed. To explore the limits of the universality of this value and to analyse ...

2022

Ultra-compact spoof surface plasmon polariton waveguides and notch filters based on double-sided parallel-strip lines

In this paper, we propose a new variety of strong field confinement, ultra-compact size, easy-to-integrate spoof surface plasmon polariton (SSPP) waveguides based on double-sided parallel-strip lines (DSPSL), which are formed by etching opposite spiral gro ...

2020

Approximating nonabelian free groups by groups of homeomorphisms of the real line

Yash Lodha

We show that for a large class C of finitely generated groups of orientation preserving homeomorphisms of the real line, the following holds: Given a group G of rank k in C, there is a sequence of k-markings (G,S-n), n is an element of N whose limit in the ...

2020

Segmented Spiral Using Inter-Connected Timber Elements

Yves Weinand, Petras Vestartas, Aryan Rezaei Rad, Martin Thomas Nakad, Loïc Henri Pelletier

This paper describes the construction process of a scenographic structure - five meters high spiral. It consists of following parts: CAD modeling work-flow, prototyping and FEM structural calculation, assembly and on-site loading test. The structure was co ...

INT CENTER NUMERICAL METHODS ENGINEERING2019

Segmented Spiral Using Inter-Connected Timber Elements

Yves Weinand, Petras Vestartas, Aryan Rezaei Rad, Martin Thomas Nakad, Loïc Henri Pelletier

This paper describes the construction process of a scenographic structure five meters high spiral. It consists of following parts: CAD modeling workflow, prototyping and FEM structural calculation, assembly and on-site loading test. The structure was compo ...

IASS2019

Graph-Based Detection of Seams In 360-Degree Images

Pascal Frossard, Francesca De Simone, Sohyeong Kim, Roberto Gerson De Albuquerque Azevedo

In this paper, we propose an algorithm to detect a specific kind of distortions, referred to as seams, which commonly occur when a 360-degree image is represented in planar domain by projecting the sphere to a polyhedron, e.g, via the Cube Map (CM) project ...

2019

Performance potential of gas foil thrust bearings enhanced with spiral grooves

Jürg Alexander Schiffmann, Eliott Philippe Guenat

The upscaling of turbomachinery using gas foil thrust bearings is limited because of their limited load capacity and the thermal issues linked with very thin film thickness. The improvement potential of spiral grooves manufactured on the top-foil of such b ...

2019

Segmented Spiral using Inter-Connected Timber Elements

Yves Weinand, Petras Vestartas, Aryan Rezaei Rad, Anh Chi Nguyen, Martin Thomas Nakad, Loïc Henri Pelletier

This paper describes the design, fabrication, and construction process of a scenography structure representing a five-meter height spiral made out of 3-ply crosslaminated panels. The structure includes 29 timber boxes. Typical through-tenon wood-wood joi ...

2019

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