Fertilizer efficiency directly affects the production of continuous cropping greenhouse cucumber. So analyzing the fertilizer efficiency is of great significance in providing decision-making support for fertilization of greenhouse cucumber. By establishing the DEA models of continuous cropping greenhouse cucumber and taking existing data samples as study objects, the problems of fertilizer effi...

In this work we present an application developed in Derive 6 to compose counterpoints for a given melody (“cantus firmus”). The result is non deterministic, so different counterpoints can be generated for a fixed melody, all of them obeying classical rules of counterpoint. It is also possible that the counterpoint could not be generated, in this case, backtracking techniques have been implement...

Musical scores are some of the most important learning tools for musicians’ acquisition of musical knowledge. However, despite their educational relevance, very little is known about how music students conceive of these cultural external representations. Given that these conceptions might act as mediators of students’ learning approaches, the importance of knowing these conceptions seems eviden...

Galina Ivanova Ustvolskaya was born in 1919 in Petrograd and has lived there throughout her life.1 She had her formal musical training in the Leningrad Conservatory between 1937 and 1950, where she studied with Shostakovich. 2 Later she worked as a teacher in the same institution for most of her life. Although the Soviet Union possessed an elaborate system of music education (Schwarz, 1965, p. ...

nterest in organic fertilizers is growing in the greenhouse industry, but experience and trials are not keeping up. There is little information available on how well the new types of fertilizers provide nutrition for plants compared to traditional water-soluble chemical fertilizers. The most widely available “organic” fertilizers for application like traditional water-soluble fertilizers are fi...

Changing climatic conditions impose a challenge both to biodiversity and food security. The effects of climate change affect different aspects of the plant or crop, such as morphological and phenological aspects, as well as yield. The effects of greenhouse conditions might be comparable in some cases to a permanent extreme disturbance in climate and weather, thus, contributing to our knowledge ...

Light energy is an important factor for plant growth. In regions where the natural light source (solar radiation) is not sufficient for growth optimization, additional light sources are being used. Traditional light sources such as high pressure sodium lamps and other metal halide lamps are not very efficient and generate high radiant heat. Therefore, new sustainable solutions should be develop...

Chinese-American composer Chen Yi has been praised as “the most internationally renowned female Asian composer of contemporary music today,” and she “has in particular become a prominent figure in music circles in the United States and China.” Besides her successes in writing orchestral and chamber music, Chen Yi has also written numerous vocal compositions including some art songs. This docume...