SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "AMNE:(LANTBRUKSVETENSKAPER) ;lar1:(lnu)"

Sökning: AMNE:(LANTBRUKSVETENSKAPER) > Linnéuniversitetet

  • Resultat 1-10 av 1182
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Abbas, Nadeem, 1980-, et al. (författare)
  • Smart Forest Observatories Network : A MAPE-K Architecture Based Approach for Detecting and Monitoring Forest Damage
  • 2023
  • Ingår i: Proceedings of the Conference Digital solutions for detecting and monitoring forest damage.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Forests are essential for life, providing various ecological, social, and economic benefits worldwide. However, one of the main challenges faced by the world is the forest damage caused by biotic and abiotic factors. In any case, the forest damages threaten the environment, biodiversity, and ecosystem. Climate change and anthropogenic activities, such as illegal logging and industrial waste, are among the principal elements contributing to forest damage. To achieve the United Nations' Sustainable Development Goals (SDGs) related to forests and climate change, detecting and analyzing forest damages, and taking appropriate measures to prevent or reduce the damages are essential. To that end, we envision establishing a Smart Forest Observatories (SFOs) network, as shown below, which can be either a local area or a wide area network involving remote forests. The basic idea is to use Monitor, Analyze, Plan, Execute, and Knowledge (MAPE-K) architecture from autonomic computing and self-adaptive software systems domain to design and develop the SFOs network. The SFOs are planned to collect, analyze, and share the collected data and analysis results using state-of-the-art methods. The principal objective of the SFOs network is to provide accurate and real-time data to policymakers and forest managers, enabling them to develop effective policies and management strategies for global forest conservation that help to achieve SDGs related to forests and climate change.
  •  
2.
  • Abdeljaber, Osama, et al. (författare)
  • Automatic estimation of annual ring profiles in Norway spruce timber boards using optical scanning and deep learning
  • 2023
  • Ingår i: Computers & structures. - : Elsevier. - 0045-7949 .- 1879-2243. ; 275
  • Tidskriftsartikel (refereegranskat)abstract
    • In softwood species, annual ring width correlates with various timber characteristics, including the density and modulus of elasticity along with bending and tensile strengths. Knowledge of annual ring profiles may contribute to more accurate machine strength grading of sawn timber. This paper proposes a fast and accurate method for automatic estimation of ring profiles along timber boards on the basis of optical scanning. The method utilizes two 1D convolutional neural networks to determine the pith location and detect the surface annual rings at multiple cross-sections along the scanned board. The automatically extracted rings and pith information can then be used to estimate the annual ring profile at each cross-section. The proposed method was validated on a large number of board cross-sections for which the pith locations and radial ring width profiles had been determined manually. The paper also investigates the potential of using the automatically estimated average ring width as an indicating property in machine strength grading of sawn timber. The results indicated that combining the automatically estimated ring width with other prediction variables can improve the accuracy of bending and tensile strength predictions, especially when the grading is based only on information extracted from optical and laser scanning data.(C) 2022 The Author(s). Published by Elsevier Ltd.
  •  
3.
  • Acuña, Ulyana Muñoz, et al. (författare)
  • New acyclic bis phenylpropanoid and neolignans, from Myristica fragrans Houtt., exhibiting PARP-1 and NF-κB inhibitory effects.
  • 2016
  • Ingår i: Food Chemistry. - : Elsevier. - 0308-8146 .- 1873-7072. ; 202, s. 269-275
  • Tidskriftsartikel (refereegranskat)abstract
    • The bioassay-guided fractionation of the aril of Myristica fragrans (mace spice) yielded five phenolic compounds, one new acyclic bis phenylpropanoid (1) and four previously known phenolic compounds: compounds (1) (S) 1-(3,4,5-trimethoxyphenyl)-2-(3-methoxy-5-(prop-1-yl) phenyl)-propan-1-ol, (2) benzenemethanol; α-[1-[2,6-dimethoxy-4-(2-propen-1-yl)phenoxy]ethyl]-3,4-dimethoxy-1-acetate, (3) odoratisol A, phenol, 4-[(2S,3S)-2,3-dihydro-7-methoxy-3-methyl-5-(1E)-1-propenyl-2-benzofuranyl]-2,6-dimethoxy, (4) 1,3-benzodioxate-5-methanol,α-[1-[2,6-dimethoxy-4-(2-propenyl)phenoxy]ethyl]-acetate, (5) licarin C; benzofuran,2,3-dihydro-7-methoxy-3-methyl-5-(1E)-1-yl-2-(3,4,5-trimethoxyphenyl). An NMR tube Mosher ester reaction was used in an approach to characterize and determine the assignment of the absolute configuration of the new isolated chiral alcohol (1). The PARP-1 inhibitory activity was evaluated for compound (1) (IC50=3.04μM), compound (2) (IC50=0.001μM), compound (4) (IC50=22.07μM) and compound (5) (IC50=3.11μM). Furthermore, the isolated secondary metabolites were tested for NF-κB and K-Ras inhibitory activities. When tested in the p65 assay, compounds (2) and (4) displayed potent NF-κB inhibition (IC50=1.5 nM and 3.4nM, respectively).
  •  
4.
  •  
5.
  • Adamopoulos, Stergios, et al. (författare)
  • Acoustic properties of acetylated wood under different humid conditions and its relevance for musical instruments
  • 2018
  • Ingår i: Proceedings of the 9th European Conference on Wood Modification 2018, Arnhem, The Netherlands. - The Netherlands : Practicum. ; , s. 236-243
  • Konferensbidrag (refereegranskat)abstract
    • In musical instrument making, less expensive wood species and materials with good characteristics and acoustical properties can provide potentials to find alternatives to the traditional exotic wood species used today. Modified wood could be such a choice if shows similar sound characteristics to wood coming from endangered and expensive tropical species with problematic commercial availability. In musical instruments, the overall functionality depends on the contribution of wood to different material performance indexes like sound radiation coefficient (R), characteristic impedance (z) and acoustic conversion efficiency (ACE). In this study, the performance indexes were measured for acetylated beech, maple and radiata pine and compared with these obtained for the reference wood materials maple, mahogany, alder and ash. A non-destructive free-free flexural vibration test method was used at constant temperature (20oC) but in different humid conditions- dry (35% RH), standard (65% RH) and wet (85% RH). Dimensional changes in the different humid conditions were also taken in account. Acetylated wood showed lower EMC with higher dimensional stability at each humidity level as compared with the reference wood materials. These properties are considered important factors for making quality musical instruments. Based on the acoustical properties, acetylated wood materials, especially radiata pine, showed good potential for use for musical instruments where specific characteristics of sound are required. However, the other types of acetylated wood can also be used for specific musical instruments.
  •  
6.
  • Adamopoulos, Stergios, et al. (författare)
  • Adhesive bonding of beech wood modified with a phenol formaldehyde compound
  • 2012
  • Ingår i: European Journal of Wood and Wood Products. - : Springer Science and Business Media LLC. - 0018-3768 .- 1436-736X. ; 70:6, s. 897-901
  • Tidskriftsartikel (refereegranskat)abstract
    • Untreated (controls) and phenol–formaldehyde (PF)-modified beech wood (10 and 25 % solid content) were glued with phenol resorcinol formaldehyde (PRF) and polyvinyl acetate (PVAc). Shear strength of PRF-bonded specimens was higher than that of PVAc-bonded ones under dry and wet conditions irrespective of the pre-treatment. Under dry conditions, only PVAc-bonded specimens exhibited reduction in shear strength due to PF-modification with 25 % PF concentration as compared to the controls. PF treated wood provided inferior bonding under wet conditions with the exception of 25 % PF concentration specimens glued with PRF adhesive. Modification with PF resulted in a decrease of adhesive penetration into the porous network of interconnected cells, especially at 25 % PF concentration.
  •  
7.
  •  
8.
  • Adamopoulos, Stergios, et al. (författare)
  • Dimensional changes of extracted and non-extracted small wood specimens of black locust (Robinia pseudoacacia L.)
  • 2003
  • Ingår i: European Journal of Wood and Wood Products. - : Springer. - 0018-3768 .- 1436-736X. ; 61:4, s. 264-268
  • Tidskriftsartikel (refereegranskat)abstract
    • From straight grained heartwood of black locust (Robinia pseudoacacia L.), specimens, 3 cm×3 cm in cross section and 0.5 mm (or 10 mm) in axial direction, were cut and used for the determination of dimensional changes and the rate of tangential swelling. Mean radial, tangential and axial shrinkage was 5.30%, 6.67% and 0.16%, respectively, while the coefficient of anisotropy was 1.26. Half of the specimens for the determination of the rate of tangential swelling were extracted for 48 h with distilled hot water. The tangential dimensional change and the time taken to attain half maximum swelling in air-dry and oven-dry specimens were assessed according to a common technique. Extractive removal resulted in an increase of the total magnitude of tangential swelling in both air-dry and oven-dry specimens. However, no significant differences in time taken to attain half maximum swelling between air-dry and oven-dry specimens were observed after extraction. The rate of tangential swelling was lower in air-dry specimens than in oven-dry specimens after 30 min of immersion in water when were non-extracted and after 5 min of immersion in water when were extracted. Extracted air-dry specimens had a greater rate of tangential swelling than non-extracted air-dry specimens and the same occurred for oven-dry specimens. Extraction resulted in a higher diffusion coefficient for air-dry specimens. The diffusion coefficient calculated for non-extracted air-dry specimens (0.901×10−4 cm2/min) showed that black locust is a difficult species to impregnate.
  •  
9.
  •  
10.
  • Adamopoulos, Stergios, et al. (författare)
  • Effect of cambium age and ring width on density and fibre length of black locust and chestnut wood
  • 2010
  • Ingår i: Wood research. - 1336-4561. ; 55:3, s. 25-36
  • Tidskriftsartikel (refereegranskat)abstract
    • The relationship between wood density (WD) and fibre length (FL) with cambium age (CA) and ring width (RW) was studied in two ring-porous species, black locust and coppice-grown chestnut, collected in the Sithonia Peninsula, Chalkidiki, Greece. Using regression analysis methods, models of WD and FL in relation to CA and RW were obtained. It was found that the effect of CA and RW on WD and FL was similar for both species examined. WD of black locust and chestnut was predicted better through a model using CA and RW. A model for FL variations was also obtained with CA and RW and was more accurate than the simple models based on the two factors, CA and RW, separately. The multiple regression models suggested that the use of cambial age of growth rings together with their width might explain better their effects on WD and FL of black locust and chestnut.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 1182
Typ av publikation
tidskriftsartikel (653)
konferensbidrag (284)
rapport (105)
doktorsavhandling (36)
bokkapitel (35)
forskningsöversikt (16)
visa fler...
annan publikation (14)
bok (12)
licentiatavhandling (11)
proceedings (redaktörskap) (6)
samlingsverk (redaktörskap) (4)
patent (4)
recension (2)
konstnärligt arbete (1)
visa färre...
Typ av innehåll
refereegranskat (874)
övrigt vetenskapligt/konstnärligt (269)
populärvet., debatt m.m. (39)
Författare/redaktör
Adamopoulos, Stergio ... (144)
Sandberg, Dick, 1967 ... (125)
Ormarsson, Sigurdur, ... (73)
Bergh, Johan (64)
Bader, Thomas K. (60)
Witthöft, Cornelia M ... (57)
visa fler...
Johansson, Jimmy, 19 ... (53)
Eberhardsteiner, Jos ... (51)
Hosseinpourpia, Reza ... (48)
Bader, Thomas K., 19 ... (48)
Blomqvist, Lars, 196 ... (36)
Amiandamhen, Stephen ... (33)
Olsson, Anders, 1973 ... (32)
Schweigler, Michael (32)
Dahlblom, Ola (31)
Hameed, Mahmood, 196 ... (30)
Petersson, Hans (29)
Witzell, Johanna (28)
Voulgaridis, Elias (25)
Hofstetter, Karin (25)
Hefni, Mohammed E. (24)
Passialis, Costas (23)
Sandberg, Dick (23)
de Borst, Karin (23)
Oscarsson, Jan, 1958 ... (21)
Thörnqvist, Thomas, ... (19)
Johansson, Marie, 19 ... (18)
Militz, Holger (17)
Mai, Carsten (17)
Tyhoda, Luvuyo (17)
Hochreiner, Georg (17)
Nordin, Annika (16)
Meincken, Martina (16)
Lundmark, Tomas (15)
Nilsson, Urban (15)
Säll, Harald (14)
Bader, Martin K.-F. (14)
Johansson, Jimmy (14)
Hellmich, Christian (14)
Hu, Min, 1979- (13)
Fransson, Ann-Mari (12)
Olofsson, Erika (12)
Fagerberg, Nils, 197 ... (12)
Nilsson, Bengt, 1982 ... (11)
Blennow, Kristina (11)
Blom, Åsa, 1977- (11)
Olofsson, Erika, 197 ... (11)
Wolf, Annett (11)
Sathre, Roger (11)
Poudel, Bishnu Chand ... (11)
visa färre...
Lärosäte
Sveriges Lantbruksuniversitet (157)
Luleå tekniska universitet (75)
Umeå universitet (29)
Lunds universitet (28)
RISE (14)
visa fler...
Mittuniversitetet (13)
Uppsala universitet (12)
Chalmers tekniska högskola (11)
Kungliga Tekniska Högskolan (8)
Karlstads universitet (8)
Jönköping University (7)
Göteborgs universitet (5)
Stockholms universitet (5)
Mälardalens universitet (4)
Linköpings universitet (4)
Örebro universitet (2)
Södertörns högskola (2)
Högskolan Dalarna (2)
VTI - Statens väg- och transportforskningsinstitut (2)
Högskolan Kristianstad (1)
Malmö universitet (1)
Karolinska Institutet (1)
Marie Cederschiöld högskola (1)
visa färre...
Språk
Engelska (1010)
Svenska (124)
Arabiska (21)
Tyska (15)
Nygrekiska (10)
Bulgariska (1)
visa fler...
Persiska (1)
visa färre...
Forskningsämne (UKÄ/SCB)
Lantbruksvetenskap (1179)
Teknik (309)
Naturvetenskap (183)
Samhällsvetenskap (34)
Medicin och hälsovetenskap (21)
Humaniora (13)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy