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Največkrat ogledana gradiva tedna (zadnjih 7 dni).

1.
Understanding commitment to agroforestry: a crosssectional study among a sample of Nigerian farmers
Fausat Motunrayo Ibrahim, 2023

Opis: Agroforestry is strategic in reconciling food production with forest biodiversity conservation. The methodical investigation of the beneficial and ecological imperativeness that informs smallholder farmers’ commitment to agroforestry is called for. This work is therefore an attempt to examine the relative importance of farmers' attitudes towards forest loss and perceived benefits of agroforestry in farmers' commitment to agroforestry among a group of farmers in Oyo State, southwestern Nigeria. The study is a cross-sectional survey that featured the interview administration of 400 structured questionnaires among crop farmers that were selected through clustered purposive sampling. Respondent’s agreement with sets of relevant statements was elicited and used in the assessment of variables. Independent samples t-test and one-way ANOVA were used to examine the significance of the difference in respondents’ commitment to agroforestry across sub-groups of gender and age/education respectively. The Pearson correlation coefficient was used to examine the relationship between variables. Results indicate that 57.8% exhibited a 'high' commitment to agroforestry. Gender, age and education had main effects on commitment (p < 0.05). There is no significant relationship between attitude towards forest loss and commitment to agroforestry (r = 0.038, p > 0.05) but not perceived benefits (r = 0.426, p < 0.05). Being male, middle-aged and poorly educated are significantly more predisposing to exhibiting lower commitment to agroforestry. There is hardly an ecological or forest restoration motivation for agroforestry in the study area. Ecologically smart agriculture or the restorative importance of agroforestry appears to be poorly entrenched among farmers in the study area.
Ključne besede: forest loss, attitude, perception, agroforestry, commitment, Nigeria
Objavljeno: 21.03.2024; Ogledov: 93; Prenosov: 34
.pdf Celotno besedilo (876,10 KB)
Ogledov v tednu: 93

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Meshless simulation of a macrosegregation benchmark considering the solid motion
Viktor Govže, Igor Vušanović, Božidar Šarler, 2023

Opis: We have extended the existing two-dimensional rigid solid phase benchmark for binary substance with the solid phase motion in the present paper. Incompressible laminar Newtonian flow is assumed, and a standard mixture formulation is used for the mass, momentum, energy, and solute transport. A coherency solid motion model accounts for the free-floating grains, assuming that the solid velocity is proportional to the mixture velocity and the liquid fraction. The lever rule is used to describe the mass fractions of the phases. A two-dimensional benchmark is solved using the semi-implicit meshless diffuse approximate method with an adaptive subdomain upwinding strategy. The results of the meshless method are compared to the finite volume method results with a reasonable agreement. The new benchmark results show that the solid motion has an essential effect on the macrosegregation pattern.
Ključne besede: solidification, meshless methods, grain motion, benchmarks
Objavljeno: 21.03.2024; Ogledov: 62; Prenosov: 37
.pdf Celotno besedilo (1,11 MB)
Ogledov v tednu: 62

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Aminoliza poliamida 6
Leonita Etemaj, 2023

Ključne besede: aminoliza, poliamid 6, 1, 6 - diaminoheksan, p - fenilendiamin, furfurilamin, diplomsko delo
Objavljeno: 21.03.2024; Ogledov: 61; Prenosov: 22
.pdf Celotno besedilo (2,11 MB)
Ogledov v tednu: 61

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Assessment of the tumourigenic and metastatic properties of SK-MEL28 melanoma cells surviving electrochemotherapy with bleomycin
Vesna Todorović, Gregor Serša, Vid Mlakar, Damjan Glavač, Maja Čemažar, 2012

Opis: Background. Electrochemotherapy is a local treatment combining chemotherapy and electroporation and is highly effective treatment approach for subcutaneous tumours of various histologies. Contrary to surgery and radiation, the effect of electrochemotherapy on metastatic potential of tumour cells has not been extensively studied. The aim of the study was to evaluate the effect of electrochemotherapy with bleomycin on the metastatic potential of human melanoma cells in vitro. Materials and methods. Viable cells 48 hours after electrochemotherapy were tested for their ability to migrate and invade through Matrigel coated porous membrane. In addition, microarray analysis and quantitative Real-Time PCR were used to detect changes in gene expression after electrochemotherapy. Results. Cell migration and invasion were not changed in melanoma cells surviving electrochemotherapy.Interestingly, only a low number of tumourigenesis related genes was differentially expressed after electrochemotherapy. Conclusions. Our data suggest that metastatic potential of human melanoma cells is not affected by electrochemotherapy with bleomycin, confirming safe role of electrochemotherapy in the clinics.
Objavljeno: 21.03.2024; Ogledov: 57; Prenosov: 36
.pdf Celotno besedilo (640,99 KB)
Ogledov v tednu: 57

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Orientable domination in product-like graphs
Sarah Anderson, Boštjan Brešar, Sandi Klavžar, Kirsti Kuenzel, Douglas F. Rall, 2023

Opis: The orientable domination number, ${\rm DOM}(G)$, of a graph $G$ is the largest domination number over all orientations of $G$. In this paper, ${\rm DOM}$ is studied on different product graphs and related graph operations. The orientable domination number of arbitrary corona products is determined, while sharp lower and upper bounds are proved for Cartesian and lexicographic products. A result of Chartrand et al. from 1996 is extended by establishing the values of ${\rm DOM}(K_{n_1,n_2,n_3})$ for arbitrary positive integers $n_1,n_2$ and $n_3$. While considering the orientable domination number of lexicographic product graphs, we answer in the negative a question concerning domination and packing numbers in acyclic digraphs posed in [Domination in digraphs and their direct and Cartesian products, J. Graph Theory 99 (2022) 359-377].
Ključne besede: digraph, domination, orientable domination number, packing, graph product, corona graph
Objavljeno: 20.03.2024; Ogledov: 64; Prenosov: 29
.pdf Celotno besedilo (366,61 KB)
Ogledov v tednu: 55