The Effects of AR-Based Physics Homework on Learning Circular MotionVidak, Andrej; Movre Šapić, Iva; Simić, Bojana; Mešić, Vanes
doi: 10.1088/1742-6596/2930/1/012010pmid: N/A
In this study, we compared the effectiveness of AR-based homework, traditional homework, and mixed-approach homework in learning about circular motion. To that end, we conducted a pretest-posttest quasi-experiment involving 135 first-year students enrolled in an introductory physics course at the University of Zagreb, Faculty of Chemical Engineering and Technology, Croatia. The students in the experimental group completed augmented reality (AR)-based homework assignments. In these assignments, their learning about circular motion was supported by a meticulously designed worksheet that included four AR-supported activities. In the mixed-approach group, students were given a homework assignment that included three AR-supported activities and one quantitative textbook problem, whereas the traditional group’s homework consisted of four quantitative textbook problems covering the same content. Findings from our study suggest that the post-treatment scores for all groups were significantly higher than the pretreatment scores, with the largest pre-post gains observed in the mixed-approach group. We conclude that combining carefully selected quantitative problems with key AR activities is the most promising approach.
Unstable oscillation of a particle described by digits of piRajilić, Zoran; Malivuk Gak, Dragana; Škrgić, Enes
doi: 10.1088/1742-6596/2930/1/012003pmid: N/A
We ćonsider 3, 1, 4, 1, 5, 9, … as a time series desćribing osćillation of a partićle. The level of instability is defined using two of ten forće parameters assigned to the time series. Irrationality of the number p ćan then be seen through instability of motion, using Newton’s sećond law. If we intervene in digits, making a rational number, with termination or a repeating sequenće, level of instability slumps to zero. New rules for digits of p are found out. High instability is ćonnećted with strong damping and driving forćes. Tendenćy to a moderate instability is observed. Unrealised series of digits, ćlose to the realised series, derogate this tendenćy.
Gauge coupling unification in correlation study of proton decayDžaferović-Mašić, Emina
doi: 10.1088/1742-6596/2930/1/012002pmid: N/A
Proton decay has been studied for decades now as one of the consequences of grand unified theories. Among those theories exists SU(5) theory, firstly postulated by H. Georgi and S. Glashow [1]. However, there were some problems with this theory such as mass degeneration and coupling unification [1-3]. This created a need for an extension of an original SU(5) model – a specific minimal SU(5) [4-5]. In this minimal SU(5) there is a viable parameter space with achievable gauge coupling unification. In this article, we present the process of gauge coupling unification for three mass scales of new physics states in this model, namely for 1 TeV, 10 TeV, and 100 TeV.
Effects of 660 nm red light and 850 nm near infrared light on human blood lymphocytesSoftić, A.; Cipurković, S.; Avdić, A.
doi: 10.1088/1742-6596/2930/1/012005pmid: N/A
The applications of light emitting diodes (LED) as a red light therapy (RLT) source for the management of various conditions such as wound treatment, control of inflammation and pain have been growing continually. Despite its extensive medical application, the effects of RLT on living cells are still highly contested. This study is conducted to test the effects of RLT using combined LED source with 660 nm (red) and 850 nm (near infrared) light on cultured human lymphocytes in vitro. To analyze the effect of RLT on human peripheral blood lymphocyte’s proliferation, the mitotic index (cytostatic effect) is monitored under different irradiation exposure time parameters and conditions. This value indicates how a particular treatment affected cell division, either proliferatively, inhibitory, or had no effect at all. The interpretation of the results of the mitotic index is done in relation to the mitotic index of the untreated (unirradiated) control cells. Our data shows higher lymphocyte proliferation for all of the irradiated samples, and is particularly enhanced by multiple exposures to red light. The effectiveness of RLT on cell activity is of importance in determination of suitable treatment for diseases related to the immune system. To better understand the molecular and metabolic mechanisms involved in red LED-induced photobiomodulation, the study will be extended to investigate the RLT effect on cell protein synthesis.
Prefacedoi: 10.1088/1742-6596/2930/1/011001pmid: N/A
The fourth International Physics Conference in Bosnia and Herzegovina (PHYCONBA2024) was held on 26-27 September 2024 at the premises of the Faculty of Science in Sarajevo. The conference is a biennial scientific meeting organised by the Physical Society in Federation of Bosnia and Herzegovina with the support of the Faculty of Science, University of Sarajevo.The inaugural International Physics Conference in Bosnia and Herzegovina was held in October 2018, with a considerable number of participants in attendance. In 2020, the event was held in a reduced hybrid format due to the global pandemic caused by the SARS-CoV-2 virus. In 2022, the number of participants returned to the level observed prior to the pandemic.The principal objective of the event is to facilitate interaction and collaboration among physicists from Bosnia and Herzegovina, neighbouring countries, and the scientific diaspora. This will be achieved through the exchange of information, the presentation of recent research findings, and the establishment of collaborative relationships. The conference will address all areas of research within the field of physics, as well as related subjects.The two-day programme comprises three plenary talks, 9 oral presentations and 19 poster presentations. On the second day of the programme, a presentation was given on the major modernisation project that took place between 2020 and 2022 at the Department of Physics. Furthermore, attendees were afforded the chance to view the recently refurbished laboratories. On the second day of the event, a half-day excursion to the nearby Trebević mountain was offered as an official part of the programme. This enabled participants to enjoy local attractions and participate in informal discussions in a relaxed atmosphere.It is the sincere hope of the Organising Committee that the participants derived considerable benefit from their stay in Sarajevo and that this event will prove to be an effective forum for the exchange of ideas and the establishment of new collaborations.In my capacity as Guest Editor of this special issue, I would like to extend my gratitude to all those who participated in the Fourth International Physics Conference in Bosnia and Herzegovina. I would also like to acknowledge the contributions of the Organising and Scientific Committee, as well as the student volunteers, whose efforts were instrumental in the successful organisation of this event. Finally, I would like to recognise the possibility of partial financial support from the Federal Ministry of Education and Science, Bosnia and Herzegovina. However, the outcome of the funding application remains to be announced.List of Organising committee, Scientific committee and Participants are available in this Pdf.
Study of electron interaction with halogenated anaesthetic molecules in gas phase at 50 eV electron energyVukalović, Jelena; Marinković, Bratislav P.; Blanco, Francisco; García, Gustavo; Maljković, Jelena B.
doi: 10.1088/1742-6596/2930/1/012009pmid: N/A
This study addresses the environmental concerns associated with halogenated anesthetic gases, specifically halothane, sevoflurane, and isoflurane, due to their contributions to global warming and ozone depletion. Using a combination of experimental and theoretical approaches, we analyzed elastic electron scattering properties of these compounds in the gaseous phase at an electron energy of 50 eV. The experimental data were gathered using a crossed-beam setup equipped with an electron gun and channeltron detection, with argon serving as the reference gas in a relative-flow method to calibrate the absolute cross-section measurements. Theoretical calculations were performed using the Independent Atom Model with Screening Corrected Additivity Rule (IAM-SCAR+I), which includes interference effects to compare with experimental results effectively. These findings enhance understanding of the scattering dynamics of these anesthetics, highlighting their atmospheric implications and potential environmental impacts.
Truncated partial-wave analysis in pion-electroproductionOmerović, Elena; Omerović, Rifat; Osmanović, Hedim
doi: 10.1088/1742-6596/2930/1/012001pmid: N/A
Numerical and pseudo data for pion electroproduction from four reaction channels, p(γ*, π0)p, p(γ*, π+)n, n(γ*, π−)p, and n(γ*, π0)n, from threshold up to W = 1.575 GeV are used to perform a single energy partial wave analysis. As a constraint, higher partial waves are taken from the MAID07 model and lower partial waves are fitted. It is demonstrated that truncated partial wave analysis in a full isospin can be obtained with this procedure. The results for photon virtuality Q2 = 0.5 GeV2 are presented. Electromagnetic Eℓ±, Mℓ±, and longitudinal Lℓ± multipoles are presented and discussed. In the first step, numerical data are generated, and the optimal number of lower partial waves required for a good data fit is determined. In the second step, the same procedure is applied using generated pseudo data.
Comparison of different self-assembly methods for formation of a homogenous monolayer of polystyreneModrić-Šahbazović, A; Gazdić, I; Smajlagić, A; Karić, E; Babajić, L; Dedić, L
doi: 10.1088/1742-6596/2930/1/012007pmid: N/A
In this paper, we report on the formation of nanomasks by polystirene (PS) spheres as small as 150 nm in diameter using different self-assembly methods. Spin coating method was the most efficient. The influence of spin speeds, spinning time, solution quantity is studied in order to achieve a large area close-packed monolayer. A relatively high surface coverage and uniform monolayer of PS spheres can be achieved by appropriate control of the preparative parameters. It can be useful in industrial applications, because of the fabrication speed, surface coverage, control over PS spheres and cost of the process.
Radiofrequency Coil Tuning Using Matching Circuit Co-Simulation with Magnetic Resonance Integral EquationsAjanovic, Amer; Ogier, Stephen; Tomi-Tricot, Raphael; Hajnal, Joseph V; Malik, Shaihan J
doi: 10.1088/1742-6596/2930/1/012004pmid: N/A
The proposed extension to the conventional circuit co-simulation (CCS) method reliably and efficiently introduces arbitrary matching networks into CCS routines and is here dubbed as matching circuit co-simulation (MCCS). It further achieves coil tuning for resonance and an optimum scattering parameters condition that resembles a fully matched coil. Combined with magnetic resonance integral equations (MARIE), the proposed MCCS further accurately produces a full EM simulation of the coils. We first validated MARIE with the MCCS routine to use it to model simple single-channel coils and parallel transmit (pTx) head arrays coupled with Duke, a digital human body model. Having successfully validated the MCCS routine, we swept through both tuning and matching network parameters to optimize the coil. While optimizing for all parameters simultaneously is a viably efficient option for coil models of low complexity, these models are not realistic, and we found that it becomes a highly computationally expensive problem to solve for more complex coil geometries, such as birdcage coils and pTx coils with higher number of channels, especially when shielding is included. Consequently, we separated tuning and matching into two steps, by first tuning the coil to the right frequency, and then introducing matching networks to enhance the power transmission into the body. We observed lower on-diagonal S-parameters after matching in all pTx coils, but 1 coil still had strong cross-coupling. Finally, electromagnetic fields obtained via MARIE for separate port excitation were successfully combined using MCCS.