Pràctica 10: Actituds vers l’ús de les tic en l’entorn familiar

Quan parlem de les TIC estem fent referència a un concepte relativament modern sobre les tecnologies de la informació i la comunicació, com per exemple l’ús de l’ordinador, Internet, la càmera digital, els mòbils de tercera generació, l’ús de la pissarra digital i un llarg etcètera. En les últimes dècades s’ha produït un increment molt gran de l’ús de les TIC en quasi tot el món. Espanya no s’ha quedat al marge i a través de diferents estudis publicats es constata que les noves tecnologies ja formen part de la vida quotidiana de les famílies espanyoles. Com que la família és el primer agent de socialització del xiquet o xiqueta, factors com l’actitud de la família vers l’ús de les TIC i els recursos socioeconòmics de la família, influenciaran el desenvolupament evolutiu del xiquet o xiqueta. Al llarg d’aquesta pràctica, l’alumnat reflexionarà sobre els avantatges i desavantatges de l’ús de les TIC en xiquets i adolescents a través del capítol de Carl Honoré (2009), i duran a terme una anàlisi sobre els hàbits dels xiquets d’educació infantil sobre l’ús de les TIC i de l’actitud dels pares i les mares vers aquestes. Per a fer aquesta anàlisi hauran de fer unes enquestes a les famílies amb aquesta finalitat.

Astrophysical parameters of LS 2883 and implications for the PSR B1259-63 gamma-ray binary

Only a few binary systems with compact objects display TeV emission. The physical properties of the companion stars represent basic input for understanding the physical mechanisms behind the particle acceleration, emission, and absorption processes in these so-called gamma-ray binaries. Here we present high-resolution and high signal-to-noise optical spectra of LS 2883, the Be star forming a gamma-ray binary with the young non-accreting pulsar PSR B1259-63, showing it to rotate faster and be significantly earlier and more luminous than previously thought. Analysis of the interstellar lines suggests that the system is located at the same distance as (and thus is likely a member of) Cen OB1. Taking the distance to the association, d = 2.3 kpc, and a color excess of E(B – V) = 0.85 for LS 2883 results in MV ≈ –4.4. Because of fast rotation, LS 2883 is oblate (R eq sime 9.7 R ☉ and R pole sime 8.1 R ☉) and presents a temperature gradient (T eq≈ 27,500 K, log g eq = 3.7; T pole≈ 34,000 K, log g pole = 4.1). If the star did not rotate, it would have parameters corresponding to a late O-type star. We estimate its luminosity at log(L */L ☉) sime 4.79 and its mass at M * ≈ 30 M ☉. The mass function then implies an inclination of the binary system i orb ≈ 23°, slightly smaller than previous estimates. We discuss the implications of these new astrophysical parameters of LS 2883 for the production of high-energy and very high-energy gamma rays in the PSR B1259-63/LS 2883 gamma-ray binary system. In particular, the stellar properties are very important for prediction of the line-like bulk Comptonization component from the unshocked ultrarelativistic pulsar wind.

The little-studied cluster Berkeley 90 I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary

Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to their low numbers throughout the Galaxy and the implied large distances and extinctions. Aims. We want to study LS III +46 11, identified in this paper as a very massive binary; another nearby massive system, LS III +46 12; and the surrounding stellar cluster, Berkeley 90. Methods. Most of the data used in this paper are multi-epoch high S/N optical spectra, although we also use Lucky Imaging and archival photometry. The spectra are reduced with dedicated pipelines and processed with our own software, such as a spectroscopic-orbit code, CHORIZOS, and MGB. Results. LS III +46 11 is identified as a new very early O-type spectroscopic binary [O3.5 If* + O3.5 If*] and LS III +46 12 as another early O-type system [O4.5 V((f))]. We measure a 97.2-day period for LS III +46 11 and derive minimum masses of 38.80 ± 0.83 M⊙ and 35.60 ± 0.77 M⊙ for its two stars. We measure the extinction to both stars, estimate the distance, search for optical companions, and study the surrounding cluster. In doing so, a variable extinction is found as well as discrepant results for the distance. We discuss possible explanations and suggest that LS III +46 12 may be a hidden binary system where the companion is currently undetected.

Mémoires de l'Académie de Dijon.

Tome 1

Nouveaux mémoires de l'Académie de Dijon.

1784

Nouveaux mémoires de l'Académie de Dijon.

1783 (1784)

Mémoires de l'Académie de Dijon.

Tome 2

Nouveaux mémoires de l'Académie de Dijon.

1782 (1783)

Nouveaux mémoires de l'Académie de Dijon.

1785

Dijon, France, 1761 (Image 1 of 2) (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan géométral de la ville de Dijon : levé en 1759 par les ordres de M.M. les Elus Généraux de Bourgogne, et de M.M. les Maire et Echevins de la dite ville par le Sr. Mikel, Ingenieur Géographe du Roy ; et les vue et ornemens, dessinés par le Sr. Jolivet, Architecte... ; gravé à Paris par Jean Lattré. It was published by Jean Lattré, rue St. Jacques à la ville de Bordeaux in 1761. Scale [ca. 1:2,800]. Covers Dijon, France. This layer is image 1 of 2 total images of the two sheet source map, representing the southwest portion of the map. Map in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the European Datum 1950, Universal Transverse Mercator (UTM) Zone 31N projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, drainage, built-up areas and selected buildings, fortification, parks, cemeteries, ground cover, and more. Includes illustrations.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Dijon, France, 1761 (Image 2 of 2) (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan géométral de la ville de Dijon : levé en 1759 par les ordres de M.M. les Elus Généraux de Bourgogne, et de M.M. les Maire et Echevins de la dite ville par le Sr. Mikel, Ingenieur Géographe du Roy ; et les vue et ornemens, dessinés par le Sr. Jolivet, Architecte... ; gravé à Paris par Jean Lattré. It was published by Jean Lattré, rue St. Jacques à la ville de Bordeaux in 1761. Scale [ca. 1:2,800]. Covers Dijon, France. This layer is image 2 of 2 total images of the two sheet source map, representing the northeast portion of the map. Map in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the European Datum 1950, Universal Transverse Mercator (UTM) Zone 31N projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, drainage, built-up areas and selected buildings, fortification, parks, cemeteries, ground cover, and more. Includes illustrations.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Sīlsīle îmāmat

Questions and answers on the topic of Imamat for students of Shia Imami Ismaili schools.

Voyages agronomiques dans la sénatorerie de Dijon, contenant l'exposition du moyen employé avec succès, depuis un siècle, pour corriger l'abus de la désunion des terres, par la manière de tracer les chemins d'exploitation; avec un gravure et plusieurs pièces relatives à l'objet du mémoire ...

Mode of access: Internet.

Evaluation of LS-DYNA wood material model 143 /

"HRDI-04/08-05(1M)E"--P. [4] of cover.

Notice sur la ville de Dijon : ses environs et quelques autres villes de l'ancienne Bourgogne, a l'usage des voyageurs qui visitent ces contrées : avec trente-deux planches représentant des sites et des monumens.

Most plates signed DM or CDM for the author. A few signed Monot (Pierre Monot?).