Iskanje po katalogu digitalne knjižnice

Opis: Diplomsko delo obravnava embalažo v izbranem podjetju, ki se uporablja na oddelku mlečnih in mesnih izdelkov. Trenutno izbrana embalaža ni učinkovita glede pogojev po zadostni mehanski odpornosti in enostavni manipulaciji. Namen dela je podjetju predlagati alternativne rešitve za zamenjavo sekundarne embalaže z namenom učinkovitejše manipulacije z artikli. V teoretičnem delu smo opredelili pojme, ki so pomembni za razumevanje problematike praktičnega dela. V praktičnem delu smo se osredotočili na opis obstoječega stanja, pri čemer smo ugotovili, da je komisioniranje v izbranem podjetju neučinkovito. Največji vzrok za neučinkovito komisioniranje predstavlja ravno neustrezna embalaža. Predlagali smo dve različni alternativi – nakup embalaže iz trpežnejšega kartona in najem plastičnih zabojev. Zatem smo pripravili izračune, ki predstavljajo osnovo za določitev primernejše embalaže. Končne ugotovitve prispevajo k odločitvam glede uporabe embalaže, ki omogoča enostavnejšo manipulacijo in spodbujajo uporabo trajnostnih oblik embalaže.
Ključne besede: embalaža, karton, stabilnost, stroški, alternative
Objavljeno v DKUM: 10.10.2025; Ogledov: 0; Prenosov: 10
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Opis: R134a is currently the most widely used refrigerant, whose problem is the high value of the global warming potential, and which will have to be replaced in the near future. Thus far, R1234ze(E) has proven to be the most suitable alternative, but it is slightly flammable. Recently, R1336mzz(E) has emerged as a possible alternative. During the research, the mentioned refrigerants were compared with simulations using the Aspen Plus software package in the case of using groundwater as a heat source. It was found that R1336mzz(E) could be a suitable alternative to R134a since the highest value of coefficient of performance was obtained using it. However, it must be superheated with an internal heat exchanger. The problem with using an internal heat exchanger is that the superheating of the refrigerant vapors affects the isentropic efficiency of the heat pump compressor negatively and, consequently, lowers the COP value of the heat pump. It has been shown that a one percent decrease in isentropic efficiency results in a one percent decrease in the COP value.
Ključne besede: heat pump, internal heat exchanger, HFO, HFC alternative, GWP
Objavljeno v DKUM: 15.05.2025; Ogledov: 0; Prenosov: 6
Celotno besedilo (14,89 MB)
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Opis: Vaccine hesitancy and its determinants have been previously widely researched. Vaccine hesitancy has been defined as a continuum of attitudes, ranging from accepting vaccines with doubts to rejecting them. The present study aims to explore the heterogeneity of a childhood-vaccine-hesitant group by using a person-oriented approach-latent profile analysis. A non-representative cross-sectional sample of vaccine-hesitant Slovenians (N = 421, Mage = 35.21, 82.9% women) was used to identify differences based on their reliance on personal research (“self” researching instead of relying on science), overconfidence in knowledge, endorsement of conspiracy theories, complementary and alternative medicine, and trust in the healthcare system. The analysis revealed three profiles of vaccine-hesitant individuals. The most hesitant profile-vaccine rejecting-expressed the greatest reliance on personal research, expressed the highest endorsement of conspiracy theories and complementary and alternative medicine, showed moderate overconfidence in their knowledge, and expressed the highest levels of distrust in the healthcare system. We further found differences in sociodemographic structure and that the identified profiles differed in their attitudes regarding MMR, HPV, and Seasonal Influenza vaccinations. The present study demonstrates the heterogeneity of the vaccine-hesitant community and offers insights into some of the traits, which are crucial for designing pro-vaccine campaigns.
Ključne besede: vaccine hesitancy, heterogeneity, latent profile analysis, complementary and alternative medicine, CAM, conspiracy theories, trust in healthcare system
Objavljeno v DKUM: 21.08.2024; Ogledov: 101; Prenosov: 23
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Opis: Introduction: Politically left-leaning individuals are more likely to get vaccinated against COVID-19, although little is known about the mechanisms underlying the ideological differences in vaccination intentions. Understanding the extent to which trust in the healthcare system, in complementary and alternative medicine, and the perceived threat from the disease contribute to these disparities is crucial, as it could inform targeted interventions to address vaccine hesitancy across the political spectrum. Methods: The present cross-sectional study conducted among adults living in Slovenia (n  =  858) examined the mediating role of trust in the healthcare system, trust in complementary and alternative medicine (CAM), and the perceived threat from the virus on COVID-19 vaccination intention. Results: We found that leftist ideology and trust in the healthcare system positively predicted vaccination intention, whereas CAM negatively predicted this intention. In addition, left-leaning individuals expressed greater trust in the healthcare system and lower trust in CAM, resulting in higher levels of COVID-19 vaccination intention. The serial mediation model confirmed that trust in CAM was a negative predictor, while trust in the healthcare system positively predicted perceived threat. Discussion: When dealing with vaccine hesitancy among right-oriented individuals, strategies should focus on enhancing trust in the healthcare system and critically evaluating the reliance on CAM.
Ključne besede: vaccine hesitancy, political ideology, percieved threat, trust, healthcare system, complementary medicine, alternative medicine
Objavljeno v DKUM: 08.04.2024; Ogledov: 293; Prenosov: 21
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Opis: In order to realize the goals of the EU Farm to Fork strategy, grape growers are introducing new grape-growing technologies. Among the new trends, "0-pesticide residue" protection is quite a promising one. Field trials were carried out in vineyards located in the Mediterranean part of Slovenia in 2021 and 2022 to test the "0-pesticide residue" (ZPR) grape protection system with the goal of producing wine without pesticide residues above the limit of 0.001 mg kg(-1). The standard integrated grape protection program (IP) was compared to the ZPR program. The level of infection of leaves and grapes by fungal pathogens did not significantly increase due to the implementation of the ZPR spray program. The amount of yield and quality of yield were not decreased significantly, but a small financial loss of EUR 70-400 ha(-1) appeared at ZPR grape production when compared to the IP production system. The ZPR system enabled a significant decrease in pesticide residue concentration in wine at a rate of 27 applied pesticide active substances in a rage from 20% to 99%. The goal of producing wine without pesticide residues above the limit concentration of 0.001 mg kg(-1) was not completely achieved in these experiments, but we came very close to it with the tested spraying programs. Further finetuning of pesticide positioning and alternative plant protection products in 0-pesticide residue systems is needed.
Ključne besede: grape, wine, pesticide, reduction, economics, IPM, alternative plant protection products
Objavljeno v DKUM: 09.02.2024; Ogledov: 388; Prenosov: 26
Celotno besedilo (1,04 MB)
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