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Povzetek: Today, the use of technological devices is commonplace among children, which has also diminished children’s presence in the city. Although children, as novel citizens, develop some of their skills (such as social, mental, and educational skills) in the city, many children face some kind of city exclusion. Therefore, the way the physical environment of their city is shaped and how children interact with it plays a principal role in child engagement. A child-friendly city can be a place to engage children using contemporary tools such as augmented reality (AR), which helps children communicate better and fosters abilities such as spatial cognition and physical and social skills in the physical and digital world. This study explores various examples and analyses the child-friendly city features of each. This article presents AR and its capabilities as a potential tool utilized in the city to pave the way toward a child-friendly mediated city – an inclusive social urban environment where children play or spend their leisure time and effectively mature into adulthood.
Ključne besede: digital social engagement, digital cities, urban perception, augmented reality, child-friendly cities
Objavljeno v DiRROS: 05.08.2025; Ogledov: 345; Prenosov: 184
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Povzetek: With the COVID-19 pandemic, technological advancements and investments accelerated to create an alternative to the real world that makes it possible for various activities and experiences to be handled online. Among these developments, the metaverse comes to the fore because it makes possible real and virtual experiences simultaneously, regardless of the time and space the user exists in, and it acts as a mediator and medium to bring these two environments together. This article discusses the possible impacts of advancements in the metaverse on (real) urban space considering the socio-spatial dialectic through theory synthesis and adaptation. An overall evaluation of the socio-spatial impacts of this is also included and opened up for discussion. Based on a literature review, it is expected that technological developments like the metaverse will introduce a new organization to physical and virtual socio-spatial relations, and new socio-technological groups will be created in them and by using them.
Ključne besede: metaverse, online communities, urban space, COVID-19 pandemic, phygital
Objavljeno v DiRROS: 05.08.2025; Ogledov: 377; Prenosov: 228
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Povzetek: Purpose: Double flow-focusing nozzles (DFFNs) form a coaxial flow of primary liquid with microcrystalline samples, surrounded by secondary liquid and focusing gas. This paper aims to develop an experimentally validated numerical model and assess the performance of micro-jets from a DFFN as a function of various operating parameters for the water–ethanol–helium system, revealing the jet's stability, diameter, length and velocity. Design/methodology/approach: The physical model is formulated in the mixture-continuum formulation, which includes coupled mass, momentum and species transport equations. The model is numerically formulated within the finite volume method–volume of fluid approach and implemented in OpenFOAM to allow for a non-linear variation of the fluid's material properties as a function of the mixture concentration. The numerical results are compared with the experimental data. Findings: A sensitivity study of jets with Reynolds numbers between 12 and 60, Weber numbers between 4 and 120 and capillary numbers between 0.2 and 2.0 was performed. It was observed that jet diameters and lengths get larger with increased primary and secondary fluid flow rates. Increasing gas flow rates produces thinner, shorter and faster jets. Previously considered pre-mixed and linear mixing models substantially differ from the accurate representation of the water–ethanol mixing dynamics in DFFNs. The authors demonstrated that Jouyban–Acree mixing model fits the experimental data much better. Originality/value: The mixing of primary and secondary liquids in the jet produced by DFFN is numerically modelled for the first time. This study provides novel insights into mixing dynamics in such micro-jets, which can be used to improve the design of DFFNs.
Ključne besede: serial femtosecond crystallography, sample delivery, double flow focusing, water–ethanol mixing, jet properties, finite volume method, volume of fluid
Objavljeno v DiRROS: 05.08.2025; Ogledov: 362; Prenosov: 255
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Povzetek: The aim of the study was to examine the effects of eccentric- and concentric-based plyometric programmes on the strength, speed, and tensiomyography (TMG) parameters of female athletes. The study included twenty junior female participants from three different sports equally divided into two experimental groups of n = 10. Two plyometric programmes with contrasting designs were conducted for a period of six weeks, with sessions held twice per week. The first plyometric programme (ECC-CON-G) was based on exercises with eccentric, and the second (CONC-CON-G) with concentric contractions. TMG was used to evaluate neuromuscular performances of six muscles of both legs – vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF), semitendinosus (SM), gastrocnemius lateralis (GL), and gastrocnemius medialis (GM)) – and two strength and speed tests: countermovement jump (CMJ), and sprint test at 10 m and 20 m. The results show that both groups had significant effects between pre-post measurements in CMJ (Diff, ECC-CON-G = 9.02%, and CONC-CON-G = 5.59%, p < 0.05), at 10 m (Diff, ECC-CON-G = 9.23%, and CONC-CON-G = 9.35%, p < 0.001), and 20 m (Diff, ECC-CON-G = 6.16%, and CONC-CON-G = 5.35%, p < 0.001), and TMG parameters in ECC-CON-G (all 6 left leg muscles, and right leg-VL, BF, GL, GM, p < 0.05), in CONC-CON-G (left leg-BF, SM, GL, GM, and right leg-VL, BF, GL, GM, p < 0.05). There were significantly better effects in ECC-CON-G compared to CONC-CON-G for CMJ height and time, for only time in 20 m sprint, and TMG parameters for left leg VL and VM, and right leg BF and GM. A plyometric programme based on exercises with eccentric contractions proved more beneficial for strength, speed, and TMG parameters in young female athletes compared to a programme based on concentric contractions.
Ključne besede: tensiomyography, plyometric, countermovement jump, strength, speed, eccentric-concentric contraction
Objavljeno v DiRROS: 04.08.2025; Ogledov: 395; Prenosov: 201
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Povzetek: V strokovni literaturi se pogosto poudarja, da urbanistična kompleksnost temelji na soobstoju naslednjih treh prvin: regulativnega okvira, ravni urbanističnega oblikovanja in pogajanj med akterji. Avtorji se v članku z navedenim strinjajo, hkrati pa zavračajo zamisel, da so lahko te prvine v idealnem ravnovesju, brez negativnih medsebojnih vplivov. Proučevali so, kje so meje njihovega soobstajanja, in postavili hipotezo, da idealen in uravnotežen soobstoj teh prvin ni mogoč. Njihova raziskava je temeljila na naslednjih štirih glavnih in zaporednih aktivnostih: 1. pregledu literature o temeljih sodobnega urbanističnega načrtovanja, 2. kritični kvalitativni analizi glavnih dokumentov, ki vsebujejo urbanistične direktive in se uporabljajo v treh največjih mestih Latinske Amerike: Buenos Airesu, Ciudadu de Méxicu in São Paulu (s poudarkom na smernicah v teh dokumentih in kako obravnavajo vse tri omenjene prvine), 3. analizi součinkovanja navedenih treh prvin in 4. oblikovanju končnih ugotovitev.
Ključne besede: participativni urbanizem, urbanistični instrumenti, urbanistični pojmi, urbanistične teorije
Objavljeno v DiRROS: 04.08.2025; Ogledov: 385; Prenosov: 202
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