Urška Kovačič received the Award for the Associates of the University of Ljubljana
Urška Kovačič je prejela priznanje strokovnim sodelavkam Univerze v Ljubljani
Na Tednu Univerze v Ljubljani (UL) 2023 so prof. dr. Katarini Čufar podelili naziv zaslužna profesorica, za pomembne prispevke k razvoju znanosti o lesu in dendrokronologije, kakovostno in predano ...pedagoško in mentorsko delo, organizacijo dela in upravljanje na Univerzi v Ljubljani ter krepitev splošnega ugleda UL doma in v svetu. Univerza je podelila 14 priznanj zaslužnim profesoricam in profesorjem. Tri nove zaslužne profesorice, Lučka Kajfež-Bogataj, Irena Rogelj in Katarina Čufar, prihajajo z Biotehniške fakultete UL.
In recent years, additive manufacturing has become a regular process in various industries, and consequently there is an increasing need to evaluate the environmental aspects of this technology and ...its associated materials. In this paper, comparative cradle-to-grave life cycle assessments between a conventional product and a 3D-printed alternative made of polylactic acid (PLA) and PLA-wood material were investigated based on the standard ISO 14044:2006. The environmental impact of each product was quantified for 18 categories. The goal of life cycle assessment (LCA) was to determine whether the use of 3D printed PLA/PLA-wood products can be a sustainable alternative to traditional metal products. The paper presents a case study in which a comparative LCA was conducted. The results show that a metal part manufactured using conventional subtractive processes (milling, drilling, welding, etc.) has a higher environmental impact compared to 3D-printed alternatives made from renewable materials. However, there are many sub-issues that need to be adequately addressed.
Posljednjih je godina aditivna proizvodnja postala redoviti proces u raznim industrijama, a posljedično se pojavila sve veća potreba za procjenom ekoloških aspekata te tehnologije i s njom povezanih materijala. U ovom su radu ispitane i uspoređene procjene životnog vijeka konvencionalnog proizvoda „od kolijevke do groba” te 3D isprintane alternative izrađene od polilaktične kiseline (PLA) i PLA-drvnog materijala na temelju standarda ISO 14044:2006. Utjecaj svakog proizvoda na okoliš kvantificiran je unutar 18 kategorija. Cilj procjene životnog vijeka takvih proizvoda (LCA) bio je utvrditi može li uporaba 3D printanih PLA/PLA-drvnih proizvoda biti održiva alternativa tradicionalnim metalnim proizvodima. U radu je prikazana studija slučaja u kojoj je provedena komparativna procjena životnog vijeka – LCA. Rezultati pokazuju da metalni dio proizveden primjenom konvencionalnih subtraktivnih procesa (glodanja, bušenja, zavarivanja itd.) ima veći utjecaj na okoliš nego 3D isprintane alternative izrađene od obnovljivih materijala. Međutim, u vezi s tim postoje i mnoga potpitanja koja se moraju adekvatno riješiti.
Recently, partly as a result of the COVID-19 pandemic, companies are increasingly shifting their activities to the Internet environment, thus accelerating the growth of online shopping. The aim of ...this study was to develop a comprehensive model for the evaluation of websites of wood companies, as a review of the literature shows that such a model does not yet exist. In developing the model, we used an innovative approach and combined the analytic hierarchy process with R-TOPSIS (technique for order of preference by similarity to ideal solution), which is a novelty in this field. For the final website assessment, the Website Quality Index (WQI) was developed. The main difference to other indexes is that our model has a comprehensive content background (36 criteria and sub-criteria) and a strong mathematical basis, so that it can be used to independently evaluate a single website or to evaluate a larger group of websites from the same industry. We have tested the model on 60 websites of Slovenian wood industry companies with at least ten employees. The results show the low to moderate average quality of the websites, with an average WQI of all evaluated websites of 0.450, indicating only an acceptable website. It has proven to be easy to use, and the results show the reliability of the website rating. Additionally, the designed model is an important tool for industry website developers and the basis for future studies in this field. However, it can also be applied to other areas related to wood and wood products, where the performance of objects should be evaluated with respect to multiple criteria.
This paper deals with the operational efficiency of companies engaged in the production of wooden chairs using selected statistical and DEA (Data Envelopment Analysis) methods. Indicators that ...typically characterise the supply chain in the production of selected companies were taken as input and output variables for the DEA method. They included three input variables: inventories, material costs and production services costs and one output variable: company’s net profit. The obtained coefficients of correlation pointed to a high degree of correlation between the variables, which justified the performance of an efficiency analysis using the DEA method. The study included 12 companies engaged in the production of wooden chairs. The results of the conducted analyses show that only one company had a relatively satisfactory operational efficiency (efficiency coefficient of 0.83) for the nine-year period. All other companies, especially micro and small enterprises, had unsatisfactorily low operational efficiency. Micro enterprises had the lowest operational efficiency, with an efficiency coefficient of only 0.14. Small enterprises reached the value of 0.3, and large companies 0.67. Medium companies had the most favourable efficiency coefficient of up to 0.83.
U radu je analizirana učinkovitost poslovanja tvrtki za proizvodnju drvenih stolica primjenom odabranih statističkih metoda i DEA (Data Envelopment Analysis) metode. Kao ulazne i izlazne varijable za DEA metodu izabrani su tipični pokazatelji koji su karakteristični za lanac opskrbe u proizvodnji odabranih tvrtki. To obuhvaća tri ulazne varijable: zalihe, materijalne troškove i troškove proizvodnih usluga te jednu izlaznu varijablu – neto dobit tvrtke. Dobiveni koeficijenti korelacije pokazali su visok stupanj međusobne povezanosti odabranih varijabli, što potvrđuje opravdanost primjene DEA metode za analizu učinkovitosti poduzeća. Istraživanje je obuhvatilo 12 tvrtki koje se bave proizvodnjom drvenih stolica. Rezultati provedene analize pokazuju da je samo jedna od njih u posljednjih devet godina imala relativno zadovoljavajuću učinkovitost poslovanja (koeficijent učinkovitosti 0,83). Sve ostale tvrtke, posebice mikropoduzeća i mala poduzeća, imale su nezadovoljavajuće nisku učinkovitost poslovanja. U mikropoduzećima je zabilježena najmanja učinkovitost poslovanja, s koeficijentom učinkovitosti 0,14. Mala poduzeća postigla su koeficijent učinkovitosti od 0,3, a velika poduzeća od 0,67. Srednja poduzeća imala su najbolji koeficijent učinkovitosti: 0,83.
Timber companies must continually strive to improve or at least maintain their market share. There are several methods to achieve this, and advertising is one of them. When timber companies make ...decisions about advertising, many of them choose radio advertising instead of television advertising, because it is less expensive. Companies should prepare advertisements that consumers will find attractive and appealing. To achieve this, they must take into account a number of criteria, as well as the fact that some of them are more important than the others. In this paper, the AHP analysis was used to determine the opinion of market professionals about the importance of criteria in radio advertising of timber products. Based on the results, a model for evaluating radio advertisements was developed and tested with random respondents, who evaluated a sample radio advertisement of timber companies.
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