Suchergebnisse

[EN] Military architecture has shaped the landscape of most Algerian towns since the dawn of time. It therefore contains an exceptional heritage related to military and defense activities. Nowadays, this legacy with its valuable shapes and traces, suffers unfortunately from a lack of recognition and is abandoned and poorly reused. Bejaia, like all Algerian coastal cities, conceals an exceptional field in military-defensive historic buildings. The typological diversity and values they carry, from the Roman occupation (33BC) to the advent of French occupation in 1833, have provided to this multi-thousandyear-old city a defensive system made of typological transformation and stratification of defensive system. In this communication, we want to present and illustrate the state of conservation and enhancement of the defensive system of the Spanish era, through the case of the fortifications of the city of Bejaia, strongly marked by the construction of fort imperial (bordj Moussa), and reconstruction of the citadel of the city ; Korichi, A. (2015). Identification and valuing the Spanish fortification in Algeria. Case of the town of Bejaia. En Defensive architecture of the mediterranean: XV to XVIII centuries. Vol. I. Editorial Universitat Politècnica de València. 175-182. https://doi.org/10.4995/FORTMED2015.2015.1737 ; OCS ; 175 ; 182

[EN] The growing interest in the heritage that contemporary society carries with it, and which is reflected in the extent of the debates and issues relating to its preservation and enhancement, runs up, most of the time, to the authentic memory / memory dichotomy. Dynamic. That being said, the reuse of built heritage in the process of renewing the image of our cities (use-value) becomes dependent on a global conception included in a sustainable urban development approach. The monumental heritage, subdivided, generally, into five categories namely; religious, hospitable and funeral, civil (public or private), agricultural and industrial and finally military, raises enormous problems as for its reuse. These are more pronounced towards the military-defensive architecture that is the subject of this contribution. In Algeria, defensive architecture occupies an important part in its heritage site. The typological diversity –the result of a long stratification from the early antiquity to the middle of the last century– as well as the dominant position occupied by this defensive heritage abandoned in the current urban landscape imposes a more urgent care. Therefore, we want, through this communication, to lay the first steps of a patrimonial approach to highlight this or these unknown military architectures and preserve our defensive heritage for which the collective memory is not attested and still painful. The reuse of the defensive heritage in Algeria must first and foremost go through its identification, inventory its various typologies, evaluate its current physical impact and finally explore the different urban alternatives that will result from its reintegration into the urban experience and for sustainable cities and citizens. ; Korichi, A.; Guenadez, Z.; Faucherre, N. (2020). La réutilisation du patrimoine défensif urbain en Algérie. Editorial Universitat Politècnica de València. 1225-1230. https://doi.org/10.4995/FORTMED2020.2020.11367 ; OCS ; 1225 ; 1230

International audience ; The growing interest in the heritage that contemporary society carries with it, and which is reflected in the extent of the debates and issues relating to its preservation and enhancement, runs up, most of the time, to the authentic memory / memory dichotomy. Dynamic. That being said, the reuse of built heritage in the process of renewing the image of our cities (use-value) becomes dependent on a global conception included in a sustainable urban development approach. The monumental heritage, subdivided, generally, into five categories namely; religious, hospitable and funeral, civil (public or private), agricultural and industrial and finally military, raises enormous problems as for its reuse. These are more pronounced towards the military-defensive architecture that is the subject of this contribution. In Algeria, defensive architecture occupies an important part in its heritage site. The typological diversity-the result of a long stratification from the early antiquity to the middle of the last century-as well as the dominant position occupied by this defensive heritage abandoned in the current urban landscape imposes a more urgent care. Therefore, we want, through this communication, to lay the first steps of a patrimonial approach to highlight this or these unknown military architectures and preserve our defensive heritage for which the collective memory is not attested and still painful. The reuse of the defensive heritage in Algeria must first and foremost go through its identification, inventory its various typologies, evaluate its current physical impact and finally explore the different urban alternatives that will result from its reintegration into the urban experience and for sustainable cities and citizens.

International audience ; The growing interest in the heritage that contemporary society carries with it, and which is reflected in the extent of the debates and issues relating to its preservation and enhancement, runs up, most of the time, to the authentic memory / memory dichotomy. Dynamic. That being said, the reuse of built heritage in the process of renewing the image of our cities (use-value) becomes dependent on a global conception included in a sustainable urban development approach. The monumental heritage, subdivided, generally, into five categories namely; religious, hospitable and funeral, civil (public or private), agricultural and industrial and finally military, raises enormous problems as for its reuse. These are more pronounced towards the military-defensive architecture that is the subject of this contribution. In Algeria, defensive architecture occupies an important part in its heritage site. The typological diversity-the result of a long stratification from the early antiquity to the middle of the last century-as well as the dominant position occupied by this defensive heritage abandoned in the current urban landscape imposes a more urgent care. Therefore, we want, through this communication, to lay the first steps of a patrimonial approach to highlight this or these unknown military architectures and preserve our defensive heritage for which the collective memory is not attested and still painful. The reuse of the defensive heritage in Algeria must first and foremost go through its identification, inventory its various typologies, evaluate its current physical impact and finally explore the different urban alternatives that will result from its reintegration into the urban experience and for sustainable cities and citizens.

"Development of experimental dental prostheses formulations based on methacrylic resins. The effect Study, on the degree of conversion (DC) and volumetric shrinkage (VS), of four crosslinking agents: DEDGMA, TEGDMA, TETRAEGDA and TMPTA and four radiopacifying mineral fillers: ZrO2, TiO2, SrO and BaO2. The experimental resins are compared to commercial products. The (DC) determination of the experimental and commercial resins was carried out by FTIR in ATR mode. The (VS) was determined experimentally by the Archimed's method. Chemical structure and weight content of crosslinking agents affected (DC) and (VS). (DC) and (VS) increased with the crosslinking agent chain length and weight contents. Additionally, whatever filler contents and metal nature, (DC) values remains ≥ 99.5%, in accordance with the standards required for residual monomers level tolerated in dental prostheses (<0.45%). (VS) values varied between 4,8 and 10,8%. For two commercial resins, (DC) values were less than 99% while (VS) was in accordance with the standards (5-6%): 6.2% for Major base and 4.3% for Hiflex H."

19 pags., 14 figs., 3 tabs. ; A γ-ray spectroscopic study of Po212 was performed at the Grand Accélérateur National d'Ions Lourds, using the inverse kinematics α-transfer reaction C12(Pb208,Po212)Be8 and the AGATA spectrometer. A careful analysis based on γγ coincidence relations allowed us to establish 14 new excited states in the energy range between 1.9 and 3.3 MeV. None of these states, however, can be considered as candidates for the levels with spins and parities of 1- and 2- and excitation energies below 2.1 MeV, which have been predicted by recent α-cluster model calculations. A systematic comparison of the experimentally established excitation scheme of Po212 with shell-model calculations was performed. This comparison suggests that the six states with excitation energies (spins and parities) of 1744 (4-), 1751 (8-), 1787 (6-), 1946 (4-), 1986 (8-), and 2016 (6-) keV, which previously were interpreted as α-cluster states, may in fact be of positive parity and belong to low-lying shell-model multiplets. This reinterpretation of the structure of Po212 is supported by experimental information with respect to the linear polarization of γ rays, which suggests a magnetic character of the 432-keV γ ray decaying from the state at an excitation energy of 1787 keV to the 61+ yrast state, and exclusive reaction cross sections. ; This project has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 654002 and FEDER funds. We furthermore acknowledge support from the Spanish Ministerio de Ciencia, Inovación y Universidades under contracts FPA2014-57196-C5, FPA2017-84756-C4, and SEV-2014-0398, the Generalitat Valenciana under Grant No. PROMETEO/2019/005, the Swedish Research Council (Vetenskapsrådet, VR 2016-3969), and the German BMBF under Contracts No. 05P18PKFN9 and No. 05P19PKFNA. ; Peer reviewed