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Tervetuloa käyttämään Jukuria, Luonnonvarakeskuksen (Luke) avointa julkaisuarkistoa. Jukurissa on tiedot Luken julkaisutuotannosta. Osa julkaisuista on vapaasti ladattavissa. Luken muodostaneiden tutkimuslaitosten aikaisemmasta julkaisutuotannosta osan tiedot ovat järjestelmässä jo nyt ja kattavuus paranee jatkuvasti.

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Viimeksi tallennetut

1-year results of lumbar spinal stenosis surgery in Finland: a national FinSpine register study
Hatakka, Juho; Laaksonen, Inari; Kostensalo, Joel; Mäkelä, Keijo T; Salo, Henri; Pernaa, Katri
Acta orthopaedica (Medical Journals Sweden, 2025)
Background and purpose: While the rates of lumbar spinal stenosis (LSS) surgery have increased continuously internationally, the role of fusion surgery in the treatment of LSS has been under debate. We aimed to assess the outcome of LSS surgery at 1 year postoperatively and to compare decompression surgery with or without fusion based on the Finnish national spine register FinSpine data. Methods: FinSpine data of surgically treated LSS from 2015 to 2022 was included. The primary outcome was Oswestry Disability Index (ODI), and secondary ones were Visual Analogue Scale for leg and back pain. Predetermined minimal clinically important difference (MCID) for all outcome measures was used to assess the clinical significance of differences in outcomes. Propensity score matching was utilized to ensure that the treatment groups were comparable. Results: There were 8,647 LSS patients in the data, of whom 6,751 (77%) were the subject of decompression surgery. Over 90% of patients without spondylolisthesis received decompression alone. At 1-year follow-up, ODI was on average 20.6 (95% confidence interval [CI] 19.3–21.9]) for the fusion group and 23.3 (CI 22.5–24.0) for the decompression group. Differences in ODI, VAS leg pain, or VAS back pain were below the MCID. The share of patients reaching ODI percentage change score ≥ 30% was 74% (CI 71–78) in the fusion group and 66% (CI 63–68) in the decompression group. Conclusion: Most of the LSS patients experienced significant improvement after LSS surgery. We found no clinical differences between decompression surgery with and without fusion.
Vesivoimalaitokset postikorteissa : kauneus, voima ja maisemalliset maatokset
Savikko, Ari
Apollo : 2 (Postikorttiyhdistys Apollo, 2025)
Mistä isot harjukset löytyvät?
Savikko, Ari
Perhokalastus : 3 (Suomen urheilukalastajain liitto, 2025)
Chemical Characterisation and Biorefinery Efficiency of Timothy Grass and Pulp Silages
Ayanfe, Nisola; Franco, Marcia; Jalava, Taina; Stefanski, Tomasz; Rinne, Marketta
Grass and forage science : 2 (Wiley-Blackwell, 2025)
This study investigated the effects of increased dry matter concentration by screw-pressing or wilting and additive application on fermentation quality of primary growth (PG) and first regrowth (ReG) timothy grass. Additionally, the nutritional quality of the liquid produced during the screw-pressing of pre-ensiled and ensiled biomasses was assessed. Two experiments were conducted: PG grass (Experiment 1) was ensiled fresh (Intact) and following liquid extraction via screw-pressing of fresh biomass (Pulp), whilst ReG included wilted biomass in addition to Intact and Pulp (Experiment 2). Biomasses were ensiled without any additives (Control), with lactic acid bacteria inoculant (LAB), or with a formic acid-based additive (FA). The PG biomasses were ensiled in vacuum bags and ReG in laboratory-scale cylindrical silos for 3 months. The silages were subjected to screw-pressing, and the chemical composition of the liquid was analysed. In both experiments, the Pulp had reduced water-soluble carbohydrates and ash compared to the Intact biomass, but crude protein concentration was not affected. In Experiment 2, pulping and wilting improved ensilability. Silages in both experiments exhibited good fermentation quality, with low pH and ammonia nitrogen concentration. Additionally, FA further reduced protein degradation. Wilting restricted silage fermentation, resulting in slightly elevated pH and reduced lactic acid production, alongside decreased ethanol production. Additives improved fermentation quality in different ways; LAB decreased the pH in wilted silages, and FA initiated fibre hydrolysis, leading to an increase in water-soluble carbohydrate concentration, which surpassed levels present in the raw material. In Experiment 2, ensiling increased liquid yield and protein capture into the liquid fraction compared to fresh biomass. Screw-pressing silage treated with LAB increased crude protein concentration in the liquid whilst FA reduced it. Different processing methods demonstrated possibilities to vary feedstock composition for biorefineries, which can be optimised based on the target end products.
Stratified, spatially regular and balanced cluster sampling for cost-efficient environmental surveys.
Heikkinen, Juha; Henttonen, Helena M.; Katila, Matti; Tuominen, Sakari
Environmetrics : 5 (Wiley-Blackwell, 2025)
Large-scale environmental surveys relying on intensive fieldwork are expensive, but survey sampling methodology offers several options to improve their cost-efficiency. For example, sites selected for field assessments can be arranged in clusters to reduce the time spent moving between the sites, and auxiliary data can be utilized to stratify the survey region and sample less important strata less densely. Geographically balanced and well-spread sampling can yield further improvements since the target variables of environmental surveys tend to be spatially autocorrelated. A combination of these ideas was illustrated and evaluated in the context of a national forest inventory, and alternative methods of spatially balanced sampling were compared. The main findings were that (i) both the local pivotal method and the generalized random-tessellation stratified design guaranteed a clearly better spatial regularity than systematic sampling when applied to fragmented regions resulting from stratification and (ii) they also ensured better global balance in unstratified sampling. In our case study, where stratification and sample allocation were based on high-quality auxiliary data, stratified sampling was clearly more efficient than unstratified for the primary survey target parameter. However, our results also illustrate that highly nonproportional sample allocation can be dangerous in a multi-purpose survey.