Tetrahedrally bonded ternary amorphous semiconductor alloys

The properties of tetrahedrally bonded ternary amorphous semiconductors a-CSiSn:H and a-CSiGe:H are reviewed with particular emphasis on the temperature dependence of dark conductivity and the coordination in random networks. It is shown here that the dark conductivity as a function of the temperature strongly depends on the carbon content and, more precisely, on the proportion of sp3 and sp2 sites in the carbon. Ternary alloys with different carbon contents are compared to binary alloys using the average coordination number. The ternary alloys have an average coordination number close to the optimal value predicted for amorphous covalent networks

Unmade Film

Unmade Film is an expansive collection of audio-visual works that point to the structure of a film but never fully become one. Unmade Film takes as its starting point the mental hospital Kfar Sha'ul in Jerusalem. Initially specialising in the treatment of Holocaust survivors – including a relative of the artist – it was established in 1951 using the remains of the Palestinian village Deir Yassin that had been depopulated in a massacre by Zionist paramilitaries in April 1948. The work and its different elements evolved out of exchanges and collaborations with psychologists, psychiatric nurses, historians, musicians, pupils, amateur actors, curators, artists and others. The publication of Unmade Film brings together the different works by Uriel Orlow and texts expanding on the themes of Unmade Film, including the historical context (Ilan Pappé), discussions around trauma and haunting (Yo’ad Ghanadry and Avery Gordon), film without film (Erik Bullot), a critique of ruins (Esmail Nashif)

Caractérisation et dopage électrochimique d'un film de PPV photoconverti

Dans ce travail, un film de PPV photoconverti est caractérisé au moyen de l'absorption optique, de la photoluminescence, de l'absorption infrarouge (IR), de la diffraction des rayons X et du dopage électrochimique. Les résultats montrent que le PPV photoconverti a des propriétés optiques proches du PPV standard et des propriétés électrochimiques plus proches du PPV thermoconverti à 180 ○C

Effect of postharvest display conditions on cherry stem quality

The appearance of cherry stems greatly influences consumer perception of cherry quality, where green stems are often used as indicators of overall cherry fruit freshness. In a series of storage trials with a range of cherry cultivars ('Sweetheart', 'Stella', 'Sweet Georgia'), we examined the effect of different storage temperatures (5 or 20°C) and display relative humidities (70 and 100%RH) on stem browning and water loss. The results showed that water loss from the stems was strongly affected by all storage factors. As expected, according to the vapour pressures of the different treatments, water loss from the stems was greatest in the high temperature (20°C) and low humidity storage (70%). The treatments with the lowest water loss from the stems were the low temperature storage (5°C) with high relative humidity (100%). The overall 'freshness' of the stems was significantly affected by all storage factors and is a better indication of stem acceptability. A linear relationship between stem diameter and water loss was determined with each cultivar, with over 85% of the variance in the data accounted by each relationship. In conclusion, the results clearly demonstrate the importance of temperature and relative humidity during the retail display of cherries