scholarly journals Heritage and the Post-Socialist City: Social and Cultural Perspectives

2021 ◽  
Author(s):  
Maciej Falski ◽  
Linda Kovářová
Keyword(s):  
Social Networks ◽  
Urban Space ◽  
City Planning ◽  
Memory Studies ◽  
Social Practices ◽  
Cultural Perspectives ◽  
The Stability ◽  
The One ◽  
Symbolic Practices

Heritage and the Post-Socialist City: Social and Cultural PerspectivesThe paper is a presentation of the latest volume of Colloquia Humanistica. The leading subject of heritage in the post-socialist city is largely commented on with reference to three major questions: the interplay of city planning and identity issues; symbolic practices and semiotic shifts in urban space; social practices and the functioning of local social networks. Concluding remarks draw attention to the intersection of memory studies and politics, as well as the issue of (dis)continuity, which is crucial for the stability and security of societies on the one hand, and for efficient change on the other.Dědictví a postsocialistické město: sociologická a kulturní perspektivaPříspěvek je prezentací nejnovějšího čísla Colloquia Humanistica. Jeho hlavní téma dědictví v postsocialistických městech je z velké části komentováno s odkazem na tři hlavní otázky týkající se podoby: vztahu mezi městským plánováním a otázkami identity; symbolických praktik a sémiotických posunů v městském prostoru; a sociálních praktik a fungování místních sociálních sítí. Závěrečné poznámky poukazují na průnik studia paměti a politiky, stejně jako na otázku (dis)kontinuity, klíčové na jedné straně pro stabilitu a bezpečnost společnosti, a na straně druhé pro její efektivní změnu.Dziedzictwo i miasto postsocjalistyczne w perspektywie socjologicznej i kulturowejArtykuł jest prezentacją najnowszego numeru „Colloquia Humanistica”. Główny temat dziedzictwa w miastach postsocjalistycznych został przedstawiony w odniesieniu do trzech zasadniczych pól tematycznych: relacji między planowaniem miejskim a kwestiami tożsamościowymi, praktyk symbolicznych i zachowań semiotycznych w przestrzeni miejskiej oraz praktyk w kontekście tworzenia się lokalnych sieci społecznych. Wnioski wskazują na wpływ pamięci oraz polityki, jak też kwestii (nie) ciągłości, na stabilność i bezpieczeństwo wspólnot miejskich z jednej strony, jak też na ich skuteczne przemiany z drugiej.

Facebook Has It

2012 ◽  
pp. 234-247
Author(s):  
Tommaso Bertolotti
Keyword(s):  
Social Networks ◽  
Social Networking ◽  
Social Evolution ◽  
Social Practices ◽  
The Other ◽  
Social Implications ◽  
Human Beings ◽  
Critical Knowledge ◽  
The Social ◽  
The One

Over the past years, mass media increasingly identified many aspects of social networking with those of established social practices such as gossip. This produced two main outcomes: on the one hand, social networks users were described as gossipers mainly aiming at invading their friends’ and acquaintances’ privacy; on the other hand the potentially violent consequences of social networking were legitimated by referring to a series of recent studies stressing the importance of gossip for the social evolution of human beings. This paper explores the differences between the two kinds of gossip-related sociability, the traditional one and the technologically structured one (where the social framework coincides with the technological one, as in social networking websites). The aim of this reflection is to add to the critical knowledge available today about the effects that transparent technologies have on everyday life, especially as far as the social implications are concerned, in order to prevent (or contrast) those “ignorance bubbles” whose outcomes can be already dramatic.

scholarly journals Byen, magten og netværket: en ny bysociologis læsninger af de urbane interventioners repræsentationelle logik

2006 ◽  
Vol 15 (3) ◽  
pp. 49-65
Author(s):  
Ole B. Jensen
Keyword(s):  
Urban Space ◽  
Social Action ◽  
Urban Sociology ◽  
Analytical Framework ◽  
Social Practices ◽  
The Other ◽  
General Frame ◽  
Other Hand ◽  
The One ◽  
The City

Ole B. Jensen: The city: power and network. A new urban sociology’s reading of the representational logic of urban interventions This article presents an analytical framework for revitalising the field of urban sociology. It draws on two forms of discussion within sociology. On the one hand, there is the contemporary discussion among sociologists such as Sassen and Castells. On the other hand, the framework involves an understanding of social practices as spatial and material, as well as being embedded in cultural and normative contexts of meaning. Thus by applying a general frame for understanding social action as both spatial and symbolic practices, the article suggests that we can gain a better understanding of how particular interventions in urban space are embedded in a network of representations, institutions and agents, as well as how they reflect a particular power and rationality configuration. The analytical framework is tentatively applied on the empirical case of the urban harbour front development in Aalborg, Denmark.

Facebook Has It

2011 ◽  
Vol 2 (4) ◽  
pp. 71-83 ◽  
Author(s):  
Tommaso Bertolotti
Keyword(s):  
Social Networks ◽  
Social Networking ◽  
Social Evolution ◽  
Social Practices ◽  
The Other ◽  
Human Beings ◽  
The Past ◽  
Critical Knowledge ◽  
The Social ◽  
The One

Over the past years, mass media increasingly identified many aspects of social networking with those of established social practices such as gossip. This produced two main outcomes: on the one hand, social networks users were described as gossipers mainly aiming at invading their friends’ and acquaintances’ privacy; on the other hand the potentially violent consequences of social networking were legitimated by referring to a series of recent studies stressing the importance of gossip for the social evolution of human beings. This paper explores the differences between the two kinds of gossip-related sociability, the traditional one and the technologically structured one (where the social framework coincides with the technological one, as in social networking websites). The aim of this reflection is to add to the critical knowledge available today about the effects that transparent technologies have on everyday life, especially as far as the social implications are concerned, in order to prevent (or contrast) those “ignorance bubbles” whose outcomes can be already dramatic.

Use of a Lyophilized Reference Plasma to Compare Coagulation Test Procedures

1975 ◽  
Vol 34 (02) ◽  
pp. 426-444 ◽  
Author(s):  
J Kahan ◽  
I Nohén
Keyword(s):  
Oral Anticoagulant Therapy ◽  
Repeated Measurements ◽  
Test Procedures ◽  
Coagulation Activity ◽  
Close Relationship ◽  
Measured Activity ◽  
Test Materials ◽  
The Difference ◽  
The Stability ◽  
The One

SummaryIn 4 collaborative trials, involving a varying number of hospital laboratories in the Stockholm area, the coagulation activity of different test materials was estimated with the one-stage prothrombin tests routinely used in the laboratories, viz. Normotest, Simplastin-A and Thrombotest. The test materials included different batches of a lyophilized reference plasma, deep-frozen specimens of diluted and undiluted normal plasmas, and fresh and deep-frozen specimens from patients on long-term oral anticoagulant therapy.Although a close relationship was found between different methods, Simplastin-A gave consistently lower values than Normotest, the difference being proportional to the estimated activity. The discrepancy was of about the same magnitude on all the test materials, and was probably due to a divergence between the manufacturers’ procedures used to set “normal percentage activity”, as well as to a varying ratio of measured activity to plasma concentration. The extent of discrepancy may vary with the batch-to-batch variation of thromboplastin reagents.The close agreement between results obtained on different test materials suggests that the investigated reference plasma could be used to calibrate the examined thromboplastin reagents, and to compare the degree of hypocoagulability estimated by the examined PIVKA-insensitive thromboplastin reagents.The assigned coagulation activity of different batches of the reference plasma agreed closely with experimentally obtained values. The stability of supplied batches was satisfactory as judged from the reproducibility of repeated measurements. The variability of test procedures was approximately the same on different test materials.

Structure, Stability and Water Adsorption on Ultra-Thin TiO2 Supported on TiN

2019 ◽  
Author(s):  
Jose Julio Gutierrez Moreno ◽  
Marco Fronzi ◽  
Pierre Lovera ◽  
alan O'Riordan ◽  
Mike J Ford ◽  
...  
Keyword(s):  
Density Functional ◽  
Water Adsorption ◽  
Chemical Potential ◽  
Energy Gap ◽  
Molecular Water ◽  
Structure Stability ◽  
Ambient Conditions ◽  
Rutile Structure ◽  
The Stability ◽  
The One

<p></p><p>Interfacial metal-oxide systems with ultrathin oxide layers are of high interest for their use in catalysis. In this study, we present a density functional theory (DFT) investigation of the structure of ultrathin rutile layers (one and two TiO<sub>2</sub> layers) supported on TiN and the stability of water on these interfacial structures. The rutile layers are stabilized on the TiN surface through the formation of interfacial Ti–O bonds. Charge transfer from the TiN substrate leads to the formation of reduced Ti<sup>3+</sup> cations in TiO<sub>2.</sub> The structure of the one-layer oxide slab is strongly distorted at the interface, while the thicker TiO<sub>2</sub> layer preserves the rutile structure. The energy cost for the formation of a single O vacancy in the one-layer oxide slab is only 0.5 eV with respect to the ideal interface. For the two-layer oxide slab, the introduction of several vacancies in an already non-stoichiometric system becomes progressively more favourable, which indicates the stability of the highly non-stoichiometric interfaces. Isolated water molecules dissociate when adsorbed at the TiO<sub>2</sub> layers. At higher coverages the preference is for molecular water adsorption. Our ab initio thermodynamics calculations show the fully water covered stoichiometric models as the most stable structure at typical ambient conditions. Interfacial models with multiple vacancies are most stable at low (reducing) oxygen chemical potential values. A water monolayer adsorbs dissociatively on the highly distorted 2-layer TiO<sub>1.75</sub>-TiN interface, where the Ti<sup>3+</sup> states lying above the top of the valence band contribute to a significant reduction of the energy gap compared to the stoichiometric TiO<sub>2</sub>-TiN model. Our results provide a guide for the design of novel interfacial systems containing ultrathin TiO<sub>2</sub> with potential application as photocatalytic water splitting devices.</p><p></p>

Applications of random graphs

2017 ◽  
Author(s):  
A.C.C. Coolen ◽  
A. Annibale ◽  
E.S. Roberts
Keyword(s):  
Social Networks ◽  
Random Graphs ◽  
Interaction Network ◽  
Power Grids ◽  
Protein Protein Interaction ◽  
Topological Features ◽  
First Case ◽  
The Stability ◽  
Protein Protein Interaction Network

This chapter reviews graph generation techniques in the context of applications. The first case study is power grids, where proposed strategies to prevent blackouts have been tested on tailored random graphs. The second case study is in social networks. Applications of random graphs to social networks are extremely wide ranging – the particular aspect looked at here is modelling the spread of disease on a social network – and how a particular construction based on projecting from a bipartite graph successfully captures some of the clustering observed in real social networks. The third case study is on null models of food webs, discussing the specific constraints relevant to this application, and the topological features which may contribute to the stability of an ecosystem. The final case study is taken from molecular biology, discussing the importance of unbiased graph sampling when considering if motifs are over-represented in a protein–protein interaction network.

scholarly journals Stability of a one-dimensional morphoelastic model for post-burn contraction

2021 ◽  
Vol 83 (3) ◽  
Author(s):  
Ginger Egberts ◽  
Fred Vermolen ◽  
Paul van Zuijlen
Keyword(s):  
Wound Healing ◽  
Residual Stresses ◽  
Truncation Error ◽  
Signaling Molecules ◽  
Discrete Problem ◽  
One Dimensional ◽  
Stability Constraint ◽  
Biological Interpretation ◽  
The Stability ◽  
The One

AbstractTo deal with permanent deformations and residual stresses, we consider a morphoelastic model for the scar formation as the result of wound healing after a skin trauma. Next to the mechanical components such as strain and displacements, the model accounts for biological constituents such as the concentration of signaling molecules, the cellular densities of fibroblasts and myofibroblasts, and the density of collagen. Here we present stability constraints for the one-dimensional counterpart of this morphoelastic model, for both the continuous and (semi-) discrete problem. We show that the truncation error between these eigenvalues associated with the continuous and semi-discrete problem is of order $${{\mathcal {O}}}(h^2)$$ O ( h 2 ) . Next we perform numerical validation to these constraints and provide a biological interpretation of the (in)stability. For the mechanical part of the model, the results show the components reach equilibria in a (non) monotonic way, depending on the value of the viscosity. The results show that the parameters of the chemical part of the model need to meet the stability constraint, depending on the decay rate of the signaling molecules, to avoid unrealistic results.

scholarly journals Commercial Limits to Personality: Instagram Influencers and Commoditized Content Receptivity

Societies ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 77
Author(s):  
Tyler Horan
Keyword(s):  
Social Networks ◽  
Social Media ◽  
Social Identity ◽  
The Other ◽  
Audience Reception ◽  
Media Audiences ◽  
Unique Identity ◽  
The One ◽  
Commercial Relationships ◽  
Network Power

Social media influencers-individuals who utilize various forms of network power on social networks occupy a unique identity space. On the one hand, their network power is often tied to their social identity as creators of engaging material. On the other hand, their ability to promote commercial products and services steps outside the traditionally distinct commercial–social, occupational–personal divides. In this work, the network morphologies of influencers are explored in relation to their delivery of sponsored and non-sponsored content. This article explores how the disclosure of content as ‘sponsored’ affects audience reception. We show how that the promotion of content on social media often generates higher levels of engagement and receptiveness amongst their audience despite the platform’s assumption of organic non-commercial relationships. We find that engagement levels are highest among smaller out-degree networks. Additionally, we demonstrate that sponsored content not only returns a higher level of engagement, but that the effect of sponsorship is relatively consistent across out-degree network sizes. In sum, we suggest that social media audiences are not sensitive to commercial sponsorship when tied to identity, as long as that performance is convincing and consistent.

scholarly journals One-Dimensional Organic–Inorganic Material (C6H9N2)2BiCl5: From Synthesis to Structural, Spectroscopic, and Electronic Characterizations

2021 ◽  
Vol 22 (4) ◽  
pp. 2030
Author(s):  
Hela Ferjani ◽  
Hammouda Chebbi ◽  
Mohammed Fettouhi
Keyword(s):  
Hydrogen Bonding ◽  
Density Functional ◽  
Crystal Packing ◽  
Diffuse Reflectance Spectrum ◽  
Enrichment Ratio ◽  
One Dimensional ◽  
Organic Part ◽  
Fukui Indices ◽  
The Stability ◽  
The One

The new organic–inorganic compound (C6H9N2)2BiCl5 (I) has been grown by the solvent evaporation method. The one-dimensional (1D) structure of the allylimidazolium chlorobismuthate (I) has been determined by single crystal X-ray diffraction. It crystallizes in the centrosymmetric space group C2/c and consists of 1-allylimidazolium cations and (1D) chains of the anion BiCl52−, built up of corner-sharing [BiCl63−] octahedra which are interconnected by means of hydrogen bonding contacts N/C–H⋯Cl. The intermolecular interactions were quantified using Hirshfeld surface analysis and the enrichment ratio established that the most important role in the stability of the crystal structure was provided by hydrogen bonding and H···H interactions. The highest value of E was calculated for the contact N⋯C (6.87) followed by C⋯C (2.85) and Bi⋯Cl (2.43). These contacts were favored and made the main contribution to the crystal packing. The vibrational modes were identified and assigned by infrared and Raman spectroscopy. The optical band gap (Eg = 3.26 eV) was calculated from the diffuse reflectance spectrum and showed that we can consider the material as a semiconductor. The density functional theory (DFT) has been used to determine the calculated gap, which was about 3.73 eV, and to explain the electronic structure of the title compound, its optical properties, and the stability of the organic part by the calculation of HOMO and LUMO energy and the Fukui indices.

A TWELFTH-ORDER FOUR-STEP FORMULA FOR THE NUMERICAL INTEGRATION OF THE ONE-DIMENSIONAL SCHRÖDINGER EQUATION

2003 ◽  
Vol 14 (08) ◽  
pp. 1087-1105 ◽  
Author(s):  
ZHONGCHENG WANG ◽  
YONGMING DAI
Keyword(s):  
Schrödinger Equation ◽  
Numerical Integration ◽  
Schrodinger Equation ◽  
Numerical Test ◽  
New Method ◽  
Step Method ◽  
One Dimensional ◽  
The Stability ◽  
The One ◽  
Order Four

A new twelfth-order four-step formula containing fourth derivatives for the numerical integration of the one-dimensional Schrödinger equation has been developed. It was found that by adding multi-derivative terms, the stability of a linear multi-step method can be improved and the interval of periodicity of this new method is larger than that of the Numerov's method. The numerical test shows that the new method is superior to the previous lower orders in both accuracy and efficiency and it is specially applied to the problem when an increasing accuracy is requested.

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