Умная теплица

Цель работы – проектирование автоматизированной системы полива растений и проветривания помещения внутри теплицы. Благодаря этому создаются благоприятные условия для произрастания растений. Регулируется влажность и температура окружающей среды. В процессе исследования проводилось создание структурной схемы и проектирование системы автополива и проветривания. В результате исследования была спроектирована система капельного автополива. Для вентиляции выбрана гидравлическая система проветривания Основные конструктивные, технологические и технико-эксплуатационные характеристики: влажность воздуха, влажность почвы, температура воздуха. Область применения: создание простой и удобной системы автополива и проветривания.The aim of this work is designing an automated system of irrigation and ventilation inside the greenhouse. This creates favorable conditions for the growth of plants. Adjustable humidity and temperature of the environment. In the process of investigation the creation of block diagrams and system design automatic irrigation and ventilation. The study was designed a system of drip-irrigation. For ventilation of the selected hydraulic system of ventilation The basic constructive, technological and technical-operational characteristics: humidity, soil moisture, air temperature. Scope: create a simple and convenient system of auto-irrigation and ventilation

Weakening of thick steel plates by laser radiation for the removal of hazardous substances

Hazardous substances such as unexploded ordnance represent a serious threat. It is necessary to develop new methods and equipment for their elimination. For this reason, a laser ablation process is developed where the shell of the objects are weakened in a defined manner to reduce the threat to the environment. This article shows how 25 mm thick steel sheets can be weakened with ablation rates of more than 3000 mm3/min and achieved ablation depths of more than 15 mm by means of an adapted process strategy and an off-axis process gas control. Despite the high incoming process energy, it is ensured that there is no danger to affect the hazardous substances. A critical temperature of 300 °C is not exceeded at the rear surface of the sheet metal

Single Event Effects in the Pixel readout chip for BTeV

In future experiments the readout electronics for pixel detectors is required to be resistant to a very high radiation level. In this paper we report on irradiation tests performed on several preFPIX2 prototype pixel readout chips for the BTeV experiment exposed to a 200 MeV proton beam. The prototype chips have been implemented in commercial 0.25 um CMOS processes following radiation tolerant design rules. The results show that this ASIC design tolerates a large total radiation dose, and that radiation induced Single Event Effects occur at a manageable level.Comment: 15 pages, 6 Postscript figure

La banque de données "AUBLET" de l'Herbier du centre ORSTOM de Cayenne (CAY)

L'herbier du Centre ORSTOM de Cayenne (CAY) est entièrement informatisé. Il comprend 50 000 spécimens répartis en 4 300 espèces. Les informations ont été stockées dans une banque de données appelée "AUBLET". Celle-ci peut être interrogée sur la taxonomie, les échantillons, les collecteurs, les localités de collecte ainsi que la localisation des parts dans les différents herbiers. (Résumé d'auteur

Liste des espèces de Phanérogames et de Ptéridophytes de Guyane française d'après l'Herbier du Centre ORSTOM de Cayenne

La liste présente les noms de 3.748 espèces et des 337 taxons infraspécifiques des plantes récoltées en Guyane française et dont au moins un échantillon a été déposé à l'Herbier du Centre ORSTOM de Cayenne depuis sa création en 1956. (Résumé d'auteur