Les agents immobiliers, révélateurs de la valorisation marchande des espaces

Ce texte porte sur la façon dont les agents immobiliers investissent les sous-marchéslocaux à l'intérieur des zones centrales de l'agglomération lyonnaise depuis la fin des années90, dans un contexte de forte hausse des prix. Le fait qu'ils privilégient ou délaissent certainssecteurs renseigne sur la façon dont sont perçues les tendances du marché et sur le cadre dereprésentation qui va être véhiculé. En particulier, les choix de localisation des agencesnouvellement créées signalent la plus ou moins grande attractivité des marchés concernés,surtout si on les compare avec la distribution spatiale des agences plus anciennes. dans lamesure où la "population" des professionnels de la transaction s'est fortement renouveléeentre 1999 et 2005, il est intéressant de voir dans quelle mesure cette évolution rencontre (ounon) celle du marché. La localisation des agences, ou plus exactement la différenciation deschoix de localisation dans un contexte donné, fonctionne ainsi comme un révélateur desphénomènes de valorisation

Sounds of Soil: A New World of Interactions under Our Feet?

Soils are biodiversity-dense and constantly carry chemical flows of information, with our mental image of soil being dark and quiet. But what if soil biota tap sound, or more generally, vibrations as a source of information? Vibrations are produced by soil biota, and there is accumulating evidence that such vibrations, including sound, may also be perceived. We here argue for potential advantages of sound/vibration detection, which likely revolve around detection of potential danger, e.g., predators. Substantial methodological retooling will be necessary to capture this form of information, since sound-related equipment is not standard in soils labs, and in fact this topic is very much at the fringes of the classical soil research at present. Sound, if firmly established as a mode of information exchange in soil, could be useful in an ‘acoustics-based’ precision agriculture as a means of assessing aspects of soil biodiversity, and the topic of sound pollution could move into focus for soil biota and processes

Le contrôle des loyers empêche-t-il l'investissement dans l'immobilier?

lien : http://www.metropolitiques.eu/Le-controle-des-loyers-empeche-t.htmlMétropolitique

Les effets pervers du contrôle des loyerssur la mobilité résidentielle : une fausse évidence ?

Cet article porte sur les effets du contrôle des loyers sur la mobilité résidentielle. On affirme fréquemment que le contrôle des loyers provoque une réduction de la rotation des locataires, au détriment des nouveaux ménages cherchant à se loger. En nous appuyant sur les registres de comptabilité d’un administrateur de biens lyonnais entre 1900 et 1968 (période marquée par plusieurs mesures d’encadrement des loyers), nous montrons que le lien entre contrôle des loyers et baisse de la mobilité résidentielle n’est réellement évident que dans les années 1960. Ce résultat invite à relativiser le poids de l’effet pervers, prégnant dans les travaux sur ce thème.This article questions the effects of rent control on residential turnover. It has often been said that rent control and tenant protection cause a decrease of the turnover rate because which penalize new households. Based on accounting reports kept by a real estate property manager in Lyon from 1900 to 1968 (characterized by several rent control laws after 1914) this article shows that the correlation between rent control and the fall of residential turnover only occurs in the 1960’s. This result leads us to discuss the massive use of the side-effects argument in the literature dedicated to rent control

Les agents immobiliers, place et rôle des intermédiaires sur le marché du logement dans l'agglomération lyonnaise (1990-2006)

This thesis presents a sociological approach of French Real Estate Agents and of their influence on housing market in Lyon between 1990 and 2006. Crossing urban sociology and economic sociology, this work is divided into three parts. 1/ To bring some new data about real estate agents who have rarely been studied in France and to understand the background of real estate sales. 2/ To analyse the patterns that draw the relationships between sellers, buyers, and real estate agents. 3/ To see the results of theses patterns on a local housing market, and specifically on the sales of old apartments In the central areas of Lyon.La thèse porte sur les agents immobiliers, et plus particulièrement sur ceux pratiquant l'activité de transaction dans l'agglomération lyonnaise depuis le début des années 1990. A l'intersection de la sociologie urbaine et de la sociologie économique, elle répond à trois objectifs : 1/Apporter des éléments de connaissance sur une profession en mutation, rarement étudiée, tout en orientant cette présentation vers une meilleure compréhension des conditions dans lesquelles se déroule l'intermédiation. 2/ Étudier les pratiques des agents immobiliers (méthodes commerciales, négociation) et le type de configurations entre acheteurs, vendeurs et intermédiaires qu'elles produisent. 3/Voir comment ces configurations prennent place dans un marché donné, et plus particulièrement dans un segment de marché spécifique : les ventes d'appartements anciens dans l'agglomération lyonnaise. On passe ainsi de l'étude des modes de qualification des biens à celle de leur influence sur les représentations du marché immobilier et de l'espace urbain

2 kirja Karl Morgensternile, Dorpat

http://tartu.ester.ee/record=b1781802~S1*es

La réhabilitation d'un grand ensemble de Vaulx-en-Velin vue par ses habitants

Les opérations de réhabilitation constituent un moment important dans la vie d'un ensemble immobilier car leurs effets ne se limitent pas au bâti et concernent l'ensemble de la vie quotidienne des habitants, de leur usage des lieux et de leurs relations sociales dans le quartier. Suite à la réhabilitation de l'ensemble qu'il gère à Vaulx-en-Velin, l'OPAC a confié au laboratoire junior Focales de l'ENS de Lyon la mission d'évaluer la perception qu'ont les locataires des travaux réalisés. Focales est composé de jeunes chercheurs en sociologie urbaine qui se sont chargés de mener auprès d'un échantillon représentatif des locataires du site une enquête par questionnaires portant sur leur appréciation de la réhabilitation, et abordant également, à travers ce prisme, leur rapport à l'habitat et à la gestion de la relation de proximité par le bailleur

Structural and optical properties of a neutral Nickel bisdithiolene complex: density functional versus ab initio methods

International audienceDensity functional theory (DFT) and ab initio computations are applied to examine different properties of diamagnetic, square planar neutral nickel complexes that contain two bidentate ligands derived from bis ((ethylene)-1,2-dithiolato) ligands. Geometry, vibrational spectra (IR and Raman) are well reproduced in the density functional framework whereas TD-DFT methods are clearly insufficient to reproduce absorption properties. Multiconfigurational perturbation theory based on a complete active space self-consistent field wave function, i.e. MRPT2 and MRPT4 methods, reveal the pronounced multiconfigurational character of the ground state wave function. The singlet-triplet energy gap, the energy gained from symmetry breaking and the singlet diradical character are discussed in the DFT and ab initio frameworks. The complex of interest does not display a strong singlet diradical character. This molecule having a peculiar electronic structure; strong delocalization as shown by a new electron pair localization function analysis (EPLF); exemplifies the fragility of the TD-DFT method and thus, caution should be taken in the determination of the energetic properties of such compound

Ten simple rules for hosting artists in a scientific lab

Hosting an artist in a scientific lab is likely a new experience for many scientists in the natural and engineering sciences, and perhaps also for many artists, yet it can be a very beneficial experience for both parties [1]. “Art and science are in a tension that is most fruitful when these disciplines observe and penetrate each other and experience how much of the other they themselves still contain” [2]. During our science and art collaborations in the last years, we have learned what connects and what separates our disciplines, how different yet common our worlds of working and thinking are, and how stimulating such collaborations can be. Although scientists and artists belong to two different cultural worlds, many share research as a congruent method to explore and understand the world around us. Often, scientific and artistic work spaces are indistinguishable as they are full of equipment, materials, tools, and computers to run experiments and analyze data [3,4]. Science and art are fundamentally connected through their focus on creativity [5]. Also, both scientists and artists deliberately venture into the public realm in the spirit of Hannah Arendt: “Humanity is never won in loneliness and never by handing one’s work over to the public. Only if you take your life and person[ality] into the venture of the public realm, will you reach [humanity]” [6]. At the most fundamental level, science and art both try to understand the world around us and to guide society to recognize and solve problems. Artistic and scientific research may also have much more in common than one expects at first sight: They both involve years of schools and personal development, they both involve trial and error, and the sharing of results with different communities. However, transdisciplinary cooperation requires openness, a willingness to take risks, the ability for self-reflection, respect, and esteem for the other culture as well as a lot of appreciative listening from both parties [7,8]. Our paper thus intends to serve as a practical guide for both, artists-in-residence and the hosting scientific lab to easier cross borders, to better collaborate, to better learn from each other, and to sustainably bridge the different cultures of science and the arts. Our discussion starts at the point where a decision for such an interaction has already taken place. Still wondering if this is for you? There is much to gain for both sides. For the scientists, for example, this interaction can be a source of new ideas and questions, offering new points of view. Some of us also felt that this interaction offered training in explaining research in clear, simple language, and provided opportunities for interfacing with the science-curious public in a curated context. For the artists, this can be about learning new tools, methods, and approaches and about the specific topics on which a lab works