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Raziskava tehnoloških in prirastnih značilnosti smrekovega okroglega lesa z neporušnimi metodami : diplomsko delo = Investigation of technological and growth characteristics of spruce roudwood with non-destructive methods : B. Sc. thesisKren, AndražNa desetih drevesih smreke z rastišča pod Karavankami smo vizualno ocenjevali kakovost, ter jo primerjali s kakovostjo izdelanih 4 m dolgih sortimentov po višini posameznega drevesa. K vizualnemu ... ocenjevanju smo dodali še nedestruktivno določanje kakovosti. Na prsni višini stoječih dreves smo z napravo Arborsonic 3D® izdelali akustične tomografe, pri izdelani hlodovini pa smo z analizo frekvenčnega odziva določali vzdolžno hitrost zvoka. Na posameznih sortimentih po celotni višini dreves smo na osnovi radialnih izvrtkov dodatno izvedli še analizo priraščanja. Po višini dreves, od koreničnika do krošnje, se je kakovost izdelane hlodovine zmanjševala, večinoma zaradi števila in velikosti grč ter prisotnosti juvenilnega lesa. Tangencialna hitrost na obodu dreves, izmerjena z 2D akustičnim tomografom, je bila nižja pri drevesih z večjim prirastkom v adultnem obdobju. Povprečna vzdolžna hitrost zvoka je pri hlodovini kakovostnega razreda B in C znašala posamično 4196 m/s in 4155 m/s. Značilno nižjo hitrost zvoka 3714 m/s smo potrdili v najslabšem D-kakovostnem razredu. Ti sortimenti so večinoma izhajali iz 5. (16 – 20 m) in 6. vertikalne pozicije (> 20 m) v drevesih. Hlodovino tega kakovostnega razreda je mogoče na osnovi vzdolžne hitrosti zvoka zanesljivo razvrščati in ločiti od preostalih bolj kakovostnih sortimentov.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [A. Kren], 2022Language - slovenianCOBISS.SI-ID - 102308611
Author
Kren, Andraž
Other authors
Straže, Aleš |
Novak, Klemen, 1979- |
Čufar, Katarina
Topics
les |
smreka |
hlodovina |
prirastne značilnosti |
kvaliteta lesa |
nedestruktivno merjenje |
wood |
spruce |
logs |
growth characteristics |
wood quality |
non-destructive testing
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Shelf entry
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kren, Andraž | |
Straže, Aleš | 18149 |
Novak, Klemen, 1979- | 52730 |
Čufar, Katarina | 02937 |
Source: Personal bibliographies
and: SICRIS
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