Search results for: Timo Kaukoranta

Items from 1 to 4 out of 4 results

article

Contrasting responses of T-2, HT-2 and DON mycotoxins and Fusarium species in oat to climate, weather, tillage and cereal intensity

Timo Kaukoranta, Veli Hietaniemi, Sari Rämö, Tauno Koivisto, more

European Journal of Plant Pathology > 2019 > 155 > 1 > 93-110

Analysis of survey data from 804 spring-oat fields divided into five climatic regions suggested that low inoculum level of Fusarium langsethiae was a major limiter of T-2 + HT-2. A 30-year climate with a cool and rainy 10-day period preceding estimated mid-anthesis and a warm 3-week period following anthesis were positively associated with T-2 + HT-2 contamination. In 12 survey years, warm weather...

chapter

Fast PNN Using Partial Distortion Search

Olli Virmajoki, Pasi Fränti, Timo Kaukoranta

Lecture Notes in Computer Science > Computer Analysis of Images and Patterns > Image Compression > 77-84

Pairwise nearest neighbor method (PNN), in its exact form, provides good quality codebooks for vector quantization but at the cost of high run time. We consider the utilization of the partial distortion search technique in order to reduce the workload caused by the distance calculations in the PNN. By experiments, we show that the simple improvement reduces the run time down to 50–60%

article

Invading and resident defoliators in a changing climate: cold tolerance and predictions concerning extreme winter cold as a range‐limiting factor

TEA AMMUNÉT, TIMO KAUKORANTA, KARI SAIKKONEN, TAPANI REPO, more

Ecological Entomology > 37 > 3 > 212 - 220

1. Winter temperatures in northern latitudes are predicted to increase markedly as a result of ongoing climate change, thus making the invasion of new insect defoliators possible. The establishment of new outbreak pest species may have major effects on northern ecosystems that are particularly sensitive to disturbances. 2. Effects of winter minimum temperatures under field and laboratory conditions...

article

On the design of a hierarchical BTC-VQ compression system

Pasi Fränti, Timo Kaukoranta, Olli Nevalainen

Signal Processing: Image Communication > 1996 > 8 > 6 > 551-562

In the present paper we study the use of vector quantization in the BTC-VQ image compression system. We propose an inverted order of proceeding in the BTC-VQ algorithm, so that the interaction of coding the bit-plane and the quantization data will be taken into consideration. The quality of the image depends radically on the codebook used in VQ. The use of frequencies in the selection of the initial...

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Search results for: Timo Kaukoranta

Contrasting responses of T-2, HT-2 and DON mycotoxins and Fusarium species in oat to climate, weather, tillage and cereal intensity

Fast PNN Using Partial Distortion Search

Invading and resident defoliators in a changing climate: cold tolerance and predictions concerning extreme winter cold as a range‐limiting factor

On the design of a hierarchical BTC-VQ compression system

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INFONA - science communication portal

Search results for: Timo Kaukoranta

Contrasting responses of T-2, HT-2 and DON mycotoxins and Fusarium species in oat to climate, weather, tillage and cereal intensity

Fast PNN Using Partial Distortion Search

Invading and resident defoliators in a changing climate: cold tolerance and predictions concerning extreme winter cold as a range‐limiting factor

On the design of a hierarchical BTC-VQ compression system

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