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1.
Probing ion dynamics in a clay-water system with dielectric spectroscopy
Marko Samec, Dean Korošak, Bruno Cvikl, 2007, original scientific article

Abstract: Dielectric spectroscopy characterization of clay-water mixtures is presented and the obtained spectra are analysed. A theoretical model for ion dynamics isproposed in which motion of ions in pore space electrolyte is interrupted by trapping events at the mineral surfaces. The typical time scales for these processes are given in terms of the physical properties of the material. It isshown that the microscopic motion of the ions in a complex environment of clay-water system can be described with fractional dynamics leading to subdiffusive behavior.
Keywords: soil mechanics, dielectric spectroscopy, porous material, conductivity, fractional dynamics
Published: 18.05.2018; Views: 422; Downloads: 62
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Quantifying soil complexity using network models of soil porous structure
Marko Samec, A. Santiago, J. P. Cardenas, R. M. Benito, A. M. Tarquis, Sacha Jon Mooney, Dean Korošak, 2013, original scientific article

Abstract: This paper describes an investigation into the properties of spatially embedded complex networks representing the porous architecture of soil systems. We suggest an approach to quantify the complexity of soil pore structure based on the node-node link correlation properties of the networks. We show that the complexity depends on the strength of spatial embedding of the network and that this is related to the transition from a non-compact to compact phase of the network.
Keywords: soil complexity, soil pore networks, complex systems
Published: 21.07.2017; Views: 716; Downloads: 257
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4.
Functional connectivity in islets of Langerhans from mouse pancreas tissue slices
Andraž Stožer, Marko Gosak, Jurij Dolenšek, Matjaž Perc, Marko Marhl, Marjan Rupnik, Dean Korošak, 2013, original scientific article

Abstract: We propose a network representation of electrically coupled beta cells in islets of Langerhans. Beta cells are functionally connected on the basis of correlations between calcium dynamics of individual cells, obtained by means of confocal laser-scanning calcium imaging in islets from acute mouse pancreastissue slices. Obtained functional networks are analyzed in the light of known structural and physiological properties of islets. Focusing on the temporal evolution of the network under stimulation with glucose, we show thatthe dynamics are more correlated under stimulation than under non-stimulated conditions and that the highest overall correlation, largely independent of Euclidean distances between cells, is observed in the activation and deactivation phases when cells are driven by the external stimulus. Moreover, we find that the range of interactions in networks during activity shows a clear dependence on the Euclidean distance, lending support to previous observations that beta cells are synchronized via calcium waves spreading throughout islets. Most interestingly, the functional connectivity patterns between beta cells exhibit small-world properties, suggesting that beta cells do not form a homogeneous geometric network but are connected in a functionally more efficient way. Presented results provide support for the existing knowledge of beta cell physiology from a network perspective and shedimportant new light on the functional organization of beta cell syncitia whose structural topology is probably not as trivial as believed so far.
Keywords: islets of Langerhans, mouse pancreas
Published: 16.06.2017; Views: 844; Downloads: 337
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5.
Schottkyjeva bariera
Dean Korošak, Bruno Cvikl, 1998, review article

Abstract: The description of the metal semiconductor contact in the framework of the general model incorporating the interfacial control layer between the metal and the ordered semiconductor is given. Special attention is given to the iCB Schottky structures for nonzero acceleration voltage featuring the disordered interfacial control layer characterized by the metal atoms incorporated into the semiconductor lattice and the DIGS continuum. The expression for the Schottky barrier height variation in ICB structures is given.
Keywords: površine, kovine, polprevodniki, tanke plasti
Published: 10.07.2015; Views: 753; Downloads: 31
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6.
Schottkyjeva bariera
Dean Korošak, Bruno Cvikl, 1998, review article

Abstract: V drugem delu prispevka opisujemo transportne lastnosti stika kovine in polprevodnika. V začetku je podan pregledni opis različnih mehanizmov prenosa naboja v idealni Schottkyjevi diodi. V nadaljevanju je opisan transport naboja v neidealnem stiku z vmesno kontrolno plastjo, ki nastane pri nanašanju z metodo CIS. Dodatni transport naboja v takšnih Schottkyjevih heterostrukturah lahko povzroči kontinuum elektronskih stanj, ki se pojavi na meji med urejenim in neurejenim delom polprevodnika. Opisan je vpliv takšnega transporta naboja na tokovno karakteristiko diode.
Keywords: vakuumska tehnika, površine, kovine, polprevodniki, tanke plasti, curek ioniziranih skupkov
Published: 10.07.2015; Views: 967; Downloads: 20
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7.
Primerjava dvoslojne in troslojne zasteklitve oken
Marcel Vrabl, 2013, diploma project paper

Abstract: Namen projektne naloge je izvesti primerjavo dvoslojne in troslojne zasteklitve na modelu enodružinske hiše v različnih regijah po državi. Tehnični podatki oken so bili privzeti s strani proizvajalca oken MIK Mednarodno trgovsko in proizvodno podjetje d.o.o.. Za izračun energijske bilance objekta je bil uporabljen računalniški program Gradbena fizika URSA 4.0.
Keywords: zasteklitev, energijska bilanca, delež zasteklitve, toplotne izgube, okno, senčenje, obsevanje
Published: 12.08.2013; Views: 1800; Downloads: 1025
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8.
PRIDOBIVANJE IN PATENTIRANJE UPORABE PIEZOELEKTRIČNE ENERGIJE V ZGRADBAH
Denis Povh, 2012, undergraduate thesis

Abstract: Cilj tega diplomskega dela je raziskati optimalno pridobitev in uporabo piezoelektrične energije v različnih objektih. Bolj specifično; pretvorbo mehanske energije v električno energijo s pomočjo piezo materialov, ter možnosti sprotnega koriščenja in shranjevanja te energije.
Keywords: fizikalne lastnosti, piezoelektrika, kristali, patent
Published: 03.01.2013; Views: 1346; Downloads: 123
.pdf Full text (1,68 MB)

9.
FUNKCIJA IN STRUKTURA MESTA
Simon Karakaš, 2012, undergraduate thesis

Abstract: Diplomsko delo primarno v grobem povzema urbano teorijo, ki se je razvijala skozi čas, s poudarkom na klasifikacijah in ugotovitvah, ki jih je opisal Kevin Lynch. Dodatno je kot del lastnih raziskav vključena tudi uporaba programskega orodja NetLogo z univerze Northwestern in računalniška igra Sim City kot orodje za urbano teorijo in planiranje.
Keywords: urbanizem, načrtovanje, mesta
Published: 03.10.2012; Views: 1368; Downloads: 121
.pdf Full text (3,84 MB)

10.
ENERGETSKA IZKAZNICA STAVB IN IZRAČUN TOPLOTNIH IZGUB NA PRIMERU DVOSTANOVANJSKE STAVBE
Armin Lambizer, 2012, diploma project paper

Abstract: Diplomsko delo obravnava zakonodajo na področju učinkovite rabe energije v stavbah in predstavitev energetske izkaznice stavb. Na praktičnem primeru dvostanovanjske stavbe smo predstavili konstrukcijsko sestavo potrebno za energetsko analizo objekta in izračunali energetsko izkaznico s programom URSA. Letno potrebno toploto na enoto površine smo primerjali še s programoma PHPP in ECOTECT, prikazali bistvene razlike med programi in poiskali rešitev, zakaj prihaja do odstopanj v rezultatih.
Keywords: učinkovita raba energije (URE), energetska izkaznica, energetska analiza, letne potrebna toplota na enoto površine
Published: 27.09.2012; Views: 2783; Downloads: 766
.pdf Full text (1,74 MB)

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