scholarly journals The Way I See the Stars: Fibre Art Inspired by Astrobiology

2012 ◽  
Vol 16 (1 and 2) ◽  
pp. 413-420
Author(s):  
Merja Markkula
Keyword(s):  
Dark Matter ◽  
Summer School ◽  
Three Dimensional ◽  
Limiting Factors ◽  
Male And Female ◽  
Grand Rapids ◽  
Art Works ◽  
Lecture Notes ◽  
The Way

Throughout my life I have studied edges, borderlines, signs determining inside and outside, insider and outsider, seeking to understand the differences – or similarities – between scientific and artistic ways of appreciating life. In 2005 I had a special opportunity to follow the lectures of the Vatican summer school of astrobiology, and expand my understanding of the origin and limiting factors of life. Inspired by this, I made the strongly hairy, three-dimensional, black felt Dark Matter and Extraterrestrial art works, expressing something between known and foreign, visible and hidden, combining male and female and general mammalian features. These works were exhibited in Gerald R. Ford Museum, Grand Rapids, Michigan, USA, 2006. I continued reading my notes about the inspiring lectures by Lunine et al., resulting in making a series of fibre artworks called Lecture Notes and, finally, a series of twenty works about the origin and limitations of life. This exhibition, The way I see the Stars, felt inspired by astrobiology and has been shown in Castel Gandolfo, Rome, Italy and in Kaarina, Finland. All the works have been made using fibre techniques.

scholarly journals Shell-crossing in a ΛCDM Universe

2020 ◽  
Vol 501 (1) ◽  
pp. L71-L75
Author(s):  
Cornelius Rampf ◽  
Oliver Hahn
Keyword(s):  
Dark Matter ◽  
Perturbation Theory ◽  
Large Scale ◽  
Cold Dark Matter ◽  
Three Dimensional ◽  
Random Initial Data ◽  
Recursion Relations ◽  
Indispensable Tool ◽  
First Time ◽  
Very High

ABSTRACT Perturbation theory is an indispensable tool for studying the cosmic large-scale structure, and establishing its limits is therefore of utmost importance. One crucial limitation of perturbation theory is shell-crossing, which is the instance when cold-dark-matter trajectories intersect for the first time. We investigate Lagrangian perturbation theory (LPT) at very high orders in the vicinity of the first shell-crossing for random initial data in a realistic three-dimensional Universe. For this, we have numerically implemented the all-order recursion relations for the matter trajectories, from which the convergence of the LPT series at shell-crossing is established. Convergence studies performed at large orders reveal the nature of the convergence-limiting singularities. These singularities are not the well-known density singularities at shell-crossing but occur at later times when LPT already ceased to provide physically meaningful results.

Remarks on marine and continental biogeography: an areographical viewpoint

1994 ◽  
Vol 343 (1303) ◽  
pp. 71-78 ◽  
Keyword(s):  
Species Richness ◽  
Baltic Sea ◽  
Three Dimensional ◽  
Wide Spread ◽  
The Baltic Sea ◽  
Biogeographical Regions ◽  
The Baltic ◽  
The Way

Differences and similarities in the way marine and continental organisms occupy space are briefly reviewed. Among them, the ‘peninsula effect’ (the decline of species richness with distance from the source) is compared with the ‘bay effect’. Two cases, corals in Mochima Bay, Venezuela and fishes in the Baltic Sea, are presented as examples. The facts that the world’s oceans are larger, continuous and three-dimensional, with fewer evident geographical barriers than there are on land, explain why marine biogeographical regions are less welldefined and geographical ranges of marine taxa more wide-spread. I his generalization has, however, been questioned following recent findings of extremely rich and highly endemic benthic faunas. This problem is discussed using an index of cosmopolitanism to compare terrestrial and marine biotas.

Navigating in a volumetric world: Metric encoding in the vertical axis of space

2013 ◽  
Vol 36 (5) ◽  
pp. 546-547 ◽  
Author(s):  
Theresa Burt de Perera ◽  
Robert Holbrook ◽  
Victoria Davis ◽  
Alex Kacelnik ◽  
Tim Guilford
Keyword(s):  
Spatial Information ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Vertical Component ◽  
Vertical Axis ◽  
Orthogonal Axis ◽  
Experimental Protocols ◽  
Three Dimensional Space ◽  
The Way

AbstractAnimals navigate through three-dimensional environments, but we argue that the way they encode three-dimensional spatial information is shaped by how they use the vertical component of space. We agree with Jeffery et al. that the representation of three-dimensional space in vertebrates is probably bicoded (with separation of the plane of locomotion and its orthogonal axis), but we believe that their suggestion that the vertical axis is stored “contextually” (that is, not containing distance or direction metrics usable for novel computations) is unlikely, and as yet unsupported. We describe potential experimental protocols that could clarify these differences in opinion empirically.

A Socio-pragmatic Analysis of Taboo Language Using Animal Names in Facebook Messenger in the Jordanian Setting: A Gender-Based Study

2021 ◽  
Vol 13 (3) ◽  
pp. 411-430
Keyword(s):  
Gender Differences ◽  
University Students ◽  
Current Paper ◽  
Frequency Of Occurrence ◽  
Male And Female ◽  
Pragmatic Analysis ◽  
Taboo Words ◽  
Animal Names ◽  
Gender Based ◽  
The Way

The current paper aimed to investigate taboo language using animal names in Facebook Messenger in the Jordanian setting based on the context where it appeared. A total of (100) male and female university students answered a questionnaire devised to examine the way how students use taboo language. It was noticed that "pig" recorded the highest frequency of occurrence comprising (11.59) of the total number of the taboo words followed by "dog" and "bitch". Important differences were observed in the frequency and use of taboo words by male (68. 8 %) and female (32.2%) students. The study explained the reasons why such words were deemed taboo in the Jordanian setting taking into consideration the socio-cultural and religious norms of the society. The study also concluded that taboo language was used to express different themes such as humor, relaxation, anger and abuse. Keywords: Taboo Language, Gender Differences, Themes, Socio-Pragmatic, Facebook Messenger.

scholarly journals Ambivalent Gender Identities in Contemporary African Literature: A Butlerian Perspective

2016 ◽  
Vol 4 (1) ◽  
pp. 81
Author(s):  
Léonard KOUSSOUHON ◽  
Fortuné AGBACHI
Keyword(s):  
Social Norms ◽  
African Literature ◽  
Gender Identities ◽  
Men And Women ◽  
Male And Female ◽  
Socially Constructed ◽  
Good Will ◽  
Gender Performances ◽  
The Way

<p>This paper is an attempt to examine the way male and female participants perform gender in 03 novels, <em>Everything Good Will Come</em> (2006), <em>Swallow</em> (2010) and <em>A Bit of Difference</em> (2013), by a contemporary Nigerian writer called Sefi Atta. The study draws on Gender Performative Theory as developed by the feminist Butler (1990/1999). This theory considers gender identities as being socially constructed. The study highlights the multiple ways in which male and female participants perform gender according to established social norms in the selected novels. Regarding the existing social norms in Nigeria, the findings by scholars like Fakeye, George and Owoyemi (2012), Mejiuni and Awolowo (2006), Bourey et al (2012), Gbadebo, Kehinde and Adedeji (2012), Okunola and Ojo (2012) exude that men are traditionally portrayed as career people, assertive, powerful and active, independent and violent while women are stereotypically depicted as housewives, submissive, powerless and passive, dependent and non-violent (or victims). Based on the above dichotomies between men and women, the study unveils the ideology that underpins gender performances in the novels.</p>

scholarly journals Collisionless Dynamics and the Cosmic Web

2014 ◽  
Vol 11 (S308) ◽  
pp. 87-96
Author(s):  
Oliver Hahn
Keyword(s):  
Dark Matter ◽  
Structure Formation ◽  
Large Scale ◽  
Velocity Potential ◽  
Three Dimensional ◽  
Maximum Amount ◽  
Lagrangian Manifold ◽  
Linear Regime ◽  
Fine Grained ◽  
Simulation Techniques

AbstractI review the nature of three-dimensional collapse in the Zeldovich approximation, how it relates to the underlying nature of the three-dimensional Lagrangian manifold and naturally gives rise to a hierarchical structure formation scenario that progresses through collapse from voids to pancakes, filaments and then halos. I then discuss how variations of the Zeldovich approximation (based on the gravitational or the velocity potential) have been used to define classifications of the cosmic large-scale structure into dynamically distinct parts. Finally, I turn to recent efforts to devise new approaches relying on tessellations of the Lagrangian manifold to follow the fine-grained dynamics of the dark matter fluid into the highly non-linear regime and both extract the maximum amount of information from existing simulations as well as devise new simulation techniques for cold collisionless dynamics.

scholarly journals Turnaround radius of galaxy clusters in N-body simulations

2020 ◽  
Vol 639 ◽  
pp. A122 ◽  
Author(s):  
Giorgos Korkidis ◽  
Vasiliki Pavlidou ◽  
Konstantinos Tassis ◽  
Evangelia Ntormousi ◽  
Theodore N. Tomaras ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galaxy Clusters ◽  
Cosmological Parameters ◽  
Three Dimensional ◽  
Average Density ◽  
Matter Density ◽  
Tidal Forces ◽  
Spherical Collapse ◽  
Collapse Model ◽  
Model C

Aims. We use N-body simulations to examine whether a characteristic turnaround radius, as predicted from the spherical collapse model in a ΛCDM Universe, can be meaningfully identified for galaxy clusters in the presence of full three-dimensional effects. Methods. We use The Dark Sky Simulations and Illustris-TNG dark-matter-only cosmological runs to calculate radial velocity profiles around collapsed structures, extending out to many times the virial radius R200. There, the turnaround radius can be unambiguously identified as the largest nonexpanding scale around a center of gravity. Results. We find that: (a) a single turnaround scale can meaningfully describe strongly nonspherical structures. (b) For halos of masses M200 >  1013 M⊙, the turnaround radius Rta scales with the enclosed mass Mta as Mta1/3, as predicted by the spherical collapse model. (c) The deviation of Rta in simulated halos from the spherical collapse model prediction is relatively insensitive to halo asphericity. Rather, it is sensitive to the tidal forces due to massive neighbors when these are present. (d) Halos exhibit a characteristic average density within the turnaround scale. This characteristic density is dependent on cosmology and redshift. For the present cosmic epoch and for concordance cosmological parameters (Ωm ∼ 0.3; ΩΛ ∼ 0.7) turnaround structures exhibit a density contrast with the matter density of the background Universe of δ ∼ 11. Thus, Rta is equivalent to R11 – in a way that is analogous to defining the “virial” radius as R200 – with the advantage that R11 is shown in this work to correspond to a kinematically relevant scale in N-body simulations.

scholarly journals Et forbund af celler. Om krop, køn og identitet i ung dansk poesi

2013 ◽  
Vol 28 (69) ◽  
Author(s):  
Louise Mønster
Keyword(s):  
Strong Tendency ◽  
Male And Female ◽  
Key Issues ◽  
The Way

Juul, Moestrup og Olsen danner ligeledes optakt i Louise Mønsters “Et forbund af celler. Om krop, køn og identitet i ung dansk poesi”. I denne artikel diskuteres det, hvordan den nyeste poesi med navne som Olga Ravn, Christina Hagen, Amalie Smith og Asta Olivia Nordenhof er optaget af krop, køn og identitet, og det vises, at forfatternes utraditionelle tilgange til disse emner går hånd i hånd med en radikal eksperimenteren med poesiens udtryksformer og grænser.Louise Mønster: “A Union of Cells. Body, Gender, and Identity in Young Danish Poetry”In contemporary Danish poetry body, gender and identity have become key issues. This article discusses the way Danish authors such as Ursula Andkjær Olsen, Mette Moestrup, Olga Ravn, Christina Hagen, Amalie Smith, and Asta Olivia Nordenhofdeal with these themes, and argues that there is a strong tendency in new Danish poetry to break off from tradition. This is obvious, not only when the significance of body and materiality is stressed instead of the soul, and the concepts of male and female are transformed into more fluid categories. There is also a remarkabletendency to decompose genres, and so the article points out that the thematic focus on body, gender and identity seems to go along with a radical experimentation with poetic expressions and limits.

scholarly journals Brownian motion and polarized three-dimensional quantum vacuum

2021 ◽  
Vol 67 (4 Jul-Aug) ◽  
Author(s):  
Davide Fiscaletti
Keyword(s):  
Dark Matter ◽  
Brownian Motion ◽  
Energy Density ◽  
Nonlinear Model ◽  
Vacuum Energy ◽  
Three Dimensional ◽  
Vacuum Energy Density ◽  
Quantum Vacuum ◽  
Virtual Particles ◽  
Fundamental Entity

A nonlinear model of Brownian motion is developed in a three-dimensional quantum vacuum defined by a variable quantum vacuum energy density corresponding to processes of creation/annihilation of virtual particles. In this model, the polarization of the quantum vacuum determined by a perturbative fluctuation of the quantum vacuum energy density associated with a fluctuating viscosity, which mimics the action of dark matter, emerges as the fundamental entity which generates the Brownian motion.

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