Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2023
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Sustainable forest management systems require operational measures to preserve the functional design of forest roads. Frequent road data collection and analysis are essential to support target-oriented and efficient maintenance planning and operations. This study demonstrates an automated solution for monitoring forest road surface deterioration using consumer-grade optical sensors. A YOLOv5 model with StrongSORT tracking was adapted and trained to detect and track potholes in the videos captured by vehicle-mounted cameras. For model training, datasets recorded in diverse geographical regions under different weather conditions were used. The model shows a detection and tracking performance of up to a precision and recall level of 0.79 and 0.58, respectively, with 0.70 mean average precision at an intersection over union (IoU) of at least 0.5. We applied the trained model to a forest road in southern Norway, recorded with a Global Navigation Satellite System (GNSS)−fitted dashcam. GNSS-delivered geographical coordinates at 10 Hz rate were used to geolocate the detected potholes. The geolocation performance over this exemple road stretch of 1 km exhibited a root mean square deviation of about 9.7 m compared to OpenStreetMap. Finally, an exemple road deterioration map was compiled, which can be used for scheduling road maintenance operations.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Atle Wehn Hegnes Lars Sandved Dalen Markus Lohne Hustad Audrun Utskarpen Anna Birgitte Milford Håvard Solum Gunstein InstefjordSammendrag
Det er ikke registrert sammendrag
Forfattere
Lennartsson, Tommy Axelsson Linkowski, Weronika Wissman, Jörgen Westin, Anna D'Amico, Marcello Kollmann, Johannes Uhe, Larissa Svenja B. Kroeger Bastianelli, Giulia Kallioniemi, Eveliina Hovstad, Knut Anders Hans Martin HanslinSammendrag
Det er ikke registrert sammendrag
Forfattere
Manh-Tien BuiSammendrag
Norway, almost 70,000 tons of civilian explosives will be used, and the explosives used contain approximately 70% ammonium nitrate. From this, a nitrogen loss to water bodies has been calculated to be around 3,000 tons. Increased concentrations of nitrate can therefore be expected. This assignment consists of the evaluation of a biofilter in the Nordlandalen, which is the first in Norway. The biofilter will convert into atmospheric nitrogen. The data used in the assignment comes from the MPS-D8 multiparameter measuring equipment from SEBA, where the loggers come from UnilogCom. The measuring equipment in Nordlandsdalen stands and measures samples continuously and is uploaded to SEBA's pages. It is further supported with weekly samples from Eurofins which are taken every Friday. Physical factors such as water temperature, redox, pH and conductivity are compared to the filter's ability to clean nitrate. Also, different fractions of Tot-N are compared with the degree of purification. The degree of cleanliness of the filter remained relatively good throughout the tunnel test with relatively high values of nitrate in it. Despite periods of severe drought, the degree of purification remained quite high throughout the year but will be expected to change in the event of heavy rainfall and above theoretical operating values. The biggest contributions to the degree of purification in the filter came from water temperature, redox, pH and nitrate. After the summer period, there were major flooding episodes at Nordlandsdalen and caused the level of cleaning to drop. This may be due to physical damage to the filter during the flood period, but this needs to be investigated further. During the flood periods, several of the automatic meters were overwhelmed, as more nitrate came in than the sensors could handle, and there were sensor failures at the start of the year. High concentrations of DOC will lead to increased sensor data errors. Data from the automatic measurements were taken from April-September, in order to disregard corrupt data. With less data, the data resolution will be better, which can tell about the function of the filter. The samples from Eurofins will help to support data from the period April-September, as well as the rest of the year. Where the degree of purification is low, it seems to be able to help with the dosing of methanol. In 2023, the dosage of methanol in the biofilter led to a double increase in the degree of purification. Methanol dosing will also be seen as a possible solution to be able to increase the degree of purification during colder periods. The degree of purification of the filter will be largely dependent on various parameters, such as water temperature, redox, pH and conductivity in order to clean with the highest possible degree of purification. The filter will not only be affected by these parameters, and other factors should not be excluded. Longer operation and thorough monitoring will lead to a clearer picture of the computing capacity of the filter at Nordlandsdalen.
Sammendrag
Et forsøk på å finne tall for hvor mye av avlingspotensialet som går tapt til jordbærsnutebille kan være nyttig i arbeidet med å utvikle forebyggende strategier. Ved å kartlegge forekomst av biller, samt skadeomfang mellom felt av ulike sorter og alder på felt, håper vi å kunne peke på en vei til framtidig redusert skade og økte avlinger
Forfattere
Cornelya KlutschSammendrag
Det er ikke registrert sammendrag
Forfattere
Cornelya KlutschSammendrag
Det er ikke registrert sammendrag
Sammendrag
Fagansvar for tema skogbiologi (>100 artikler) som gir informasjon om skog, skogtyper, skogbruk og skogens biologi til skoleelever, studenter og befolkningen generelt.