Моделирование детектора видимого и ближнего инфракрасного электромагнитного излучения на искусственном алмазе

A method for calculation of the I – V characteristic is proposed for a detector of visible and near-IR electromagnetic radiation based on artificial diamond with allowance for vertical flow of electric current. The method can be used when the free-path length of carriers in diamond is less than the scale of variations in the concentration of carriers. The method is used to determine the following detector characteristics: the dependence of current on voltage, distribution of carrier concentration, and electric potential for a particular variant of a photodetector based on polycrystalline diamond film consisting of nanosized single crystals doped with boron.

Nature matters: notes on Ackroyd & Harvey, ecocriticism and praxis

In this chapter Eve Ropek claims that to approach any artwork ecocritically, it is necessary to bring to it some knowledge of current scientific thought regarding the biosphere. Indeed the breadth and complexity of the ideas and issues of humans' place within the Earth's ecosystems encourage an interdisciplinary approach; to join together methods and insights in order to inform the next steps at what is seen to be a crucial global point is an urgent and daunting task. Artists working today are very well aware of the narrative of change and of environmental issues. Ropek considers how this inter-disciplinary approach can be applied to selected artworks by British artists Heather Ackroyd and Dan Harvey, who practise in partnership as Ackroyd & Harvey. The examples she discusses include such artefacts as: photographs in which the negative image is projected onto grass as it grows, so that the resulting portrait is developed on the grass itself; an artificial diamond made from a polar bear bone; and an installation based on the skeleton of a minke whale. These artists create works that are directly related to climate change and its impact on the biosphere.

Design and Implementation of Diamond Press'S Pressure Hammer Protection Based on Voiceprint Recognition

In the manufacturing process of artificial diamond micro powder, if tungsten steel pressure hammer of diamond press makes a tungsten steel hammer pressure crack due to fatigue of workpiece, it is always leading to significant economic losses. The pressure hammer detection and protection device of the diamond press introduced in this paper takes advantage of the voiceprint recognition technology. Firstly, it extracts the characteristic parameters of pressure hammer breaking voice and establishes a sound pressure hammer breaking template library. And then, the paper compares the work field sound characteristic parameters of diamond press and pressure hammer breaking template library. If they are consistent with each other, the work power of diamond press will be cut down. Thus, it implements protection for the rest good pressure hammers.