University of GuilanComputational Sciences and Engineering2783-25035120250401Effect of diffraction parameter on ultra relativistic dust-ion-acoustic waves in a quantum dusty plasma113930010.22124/cse.2025.32407.1140ENR.DasDepartment of Mathematics, Arya Vidyapeeth College, Guwahati-781016, Assam, IndiaM.DasDepartment of Mathematics, Gauhati University, Guwahati-781014, Assam, IndiaK.HosseiniDepartment of Mathematics, Near East University TRNC, Mersin 10, Nicosia 99138, TurkeyF.AlizadehDepartment of Mathematics, Near East University TRNC, Mersin 10, Nicosia 99138, TurkeyS.KheybariFaculty of Art and Science, University of Kyrenia, TRNC, Mersin 10, Kyrenia 99320, TurkeyB.KaymakamzadeDepartment of Mathematics, Near East University TRNC, Mersin 10, Nicosia 99138, TurkeyJournal Article20251129The existence of both fast (compressive) and slow (rarefactive) solitons on the dust-ion-acoustic waves (DIAWs) is investigated considering quantum hydrodynamic (QHD) model with a three-components quantum dusty plasma and relativistic effects using the Korteweg–de Vries (KdV) equation. The impact of different plasma parameters like quantum diffraction parameter , ion to electron Fermi temperature ratio , dust concentration , and the relativistic factor is also discussed. The relativistic effect demonstrates higher amplitude of the solitons than the relativistic effect . From the results, dispersive property of quantum dusty plasma is strongly related to the quantum parameter . Additionally, it is noticed that the ranges of quantum parameter for the fast and slow modes, respectively, are significantly impacted by the dust concentration. Applications for the plasma model, which has inertialess electrons, very negatively charged dust grains, and ultrarelativistic positive ions, include fusion research and astrophysics.https://cse.guilan.ac.ir/article_9300_20f394958d4baa73c73fc5facf018503.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401A Low Voltage BJT-Based Temperature Sensor with Duty Cycle Modulated Output with FOM Resolution of about 1.4pJ. ◦C2 and Inaccuracy of ±0.11 ◦C (3σ) from −55 ◦C to 130 ◦C1524898510.22124/cse.2025.31195.1112ENMohtaramDehban RahimabadDepartment of Electrical Engineering, University of Guilan, Rasht, IranAliHeidariDepartment of Electrical Engineering, University of Guilan, Rasht, IranJournal Article20250715This paper presents a low voltage BJT-based smart temperature sensor<strong> </strong>with duty cycle modulated output and inaccuracy of ±0.11 ◦C (3σ) and FOM resolution of about 1.4pJ. ◦C<sup>2</sup> from −55◦C to 130◦C. This sensor can work with a supply voltage of 1.5V. It uses a BJT-based front-end to generate a proportional to absolute temperature voltage (V<sub>PTAT</sub>) and a complementary to absolute temperature voltage (V<sub>CTAT</sub>), which are then modulated to a duty-cycle output. Adding an integrator before the Schmitt trigger has increased the range of input changes of the Schmitt trigger. As a result, the hysteresis of the Schmitt trigger can be increased and it has better noise immunity. Implemented in a standard 0.18-µm CMOS process, the sensor has an active area of about 0.64mm<sup>2</sup> and can work with 1.5V from -55◦C to 130◦C with an inaccuracy of ±0.11◦C (3σ). Power consumption is about 45uW.https://cse.guilan.ac.ir/article_8985_7d98370227c1a916400661bd1ca78cb7.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Computational Fluid Dynamics Study of Combustion Chamber Geometry Effects on In-Cylinder Flow and Emissions Formation in a Diesel Engine2538900110.22124/cse.2025.31368.1116ENAli MohammadTaheriFaculty of Engineering Modern Technologies, Amol University of Special Modern Technologies (AUSMT), Amol, IranBahramJafariFaculty of Engineering Modern Technologies, Amol University of Special Modern Technologies (AUSMT), Amol, Iran0000-0002-2839-9709MortezaFathiDepartment of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, IranJournal Article20250810This study examines how piston-bowl geometry influences in-cylinder flow and pollutant formation in a large diesel engine. High-fidelity simulations were performed for the baseline combustion chamber and three modified bowl designs (A, B, and C). The model replicates experimental peak pressure within 3%, soot levels with ≤1% error, and NOx emissions within ±3%. The modified bowls increase in-cylinder turbulence and induce stronger squish flows, leading to longer combustion duration but more uniform mixing. As a result, peak cylinder pressures are slightly lower in the re-designed bowls than in the baseline, and the onset of combustion is delayed. Notably, the most highly squish-inducing chamber (A) produced higher peak temperatures but also exhibited the lowest soot emissions, consistent with enhanced mixing. Across the modified chambers, indicated work and cycle efficiency increased relative to the baseline (due to reduced negative work in compression). Emissions of NOx and soot showed opposing trends: chamber A (highest turbulence) generated more NOx (owing to its higher local temperatures) but significantly less soot (owing to more complete combustion), whereas the baseline chamber had higher soot due to local fuel-rich pockets. These results indicate that combustion chamber shape can be tuned to improve mixing and efficiency, at the cost of shifting the NOx–soot trade-off. However, combustion chamber B, simultaneously improves power output by 10%, NOx emissions by 41 %, and soot emissions by 33%.https://cse.guilan.ac.ir/article_9001_d29e9023e16d75cca43db0325a04574e.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Bad Code Smells in iOS Apps: An Empirical Investigation and Automated Detection Approach3970901410.22124/cse.2025.30818.1109ENAmirHosseinKohansalUniversity of GuilanFaridFeyziUniversity of GuilanJournal Article20250530Performance issues in mobile applications significantly degrade user experience and increase abandonment rates. This study investigates poor development practices in iOS apps through analysis of 193 performance reports from four applications and 56 Stack Overflow discussions, identifying four critical anti-patterns: (1) ignoring memory warnings, (2) main-thread database operations, (3) table updates within loops, and (4) UI access from background threads. Analysis of 427 iOS projects revealed 52% contained at least one such issue, with memory warning neglect being most prevalent (63%), followed by main-thread database calls (34%), while loop-based table updates and improper UI thread access each appeared in 2% of cases. To automate detection, we developed a static analysis tool for Swift codebases. The tool achieved 96% accuracy for memory warnings, 87% for main-thread database operations, and 100% for loop-internal table updates. Detection of background thread UI access proved more challenging (50% accuracy). These results demonstrate both the widespread nature of performance-hindering practices in iOS development and the effectiveness of automated detection for most anti-patterns. The findings provide developers with actionable insights to improve app performance during development, while highlighting areas needing more sophisticated detection approaches. Our work contributes to better understanding and mitigation of performance issues in mobile applications.https://cse.guilan.ac.ir/article_9014_3c0f5e559be53c9f010641b414e999c6.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Computational Fluid Dynamics (CFD) Modelling of Ventilation Air Mixed with Aerosol Sanitizer Flow: Case Study of a Health Care Facility7195901510.22124/cse.2025.30579.1104ENVahidGholami MotlaghDepartment of Mechanical Engineering, Chabahar University of Maritime and Marine Sciences, Chabahar, IranMohammadAhmadzadehtalatapehDepartment of Mechanical Engineering, Chabahar University of Maritime and Marine Sciences, Chabahar, IranJournal Article20250504Indoor viruses are transmitted by inhalation with droplet nuclei produced by an infected person during coughing, sneezing, and speaking. In addition, the risk of airborne droplet nuclei in indoor environments, especially in health care facilities is significant. In this study, the feasibility of eliminating the indoor viruses with mixing the ventilation system air with an aerosol sanitizer flow in a surgical room (SR) was investigated using CFD analysis. Indoor thermal comfort and energy utilization coefficient (EUC) were also investigated. Four cases with different inlet configurations and related air distribution patterns were analyzed. The simulation results showed that the SR with an inlet system in the side wall has a significant ability to mix aerosol sanitizer flow with the inlet air (Case 4). It was shown that in Case 4 design, the aerosol sanitizer could reach any point in the room and has the potential to eliminate the indoor viruses, thus would protect the patient and surgical staff from the risk of infection. It was also revealed that Case 4 is capable of establishing acceptable indoor thermal comfort conditions and also highest EUC value belongs to Case 4.https://cse.guilan.ac.ir/article_9015_180f22b4c9a5a5f64e9d83c97b686cc5.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Do Anzali free zone incentives facilitate ease of doing business?97114918810.22124/cse.2025.31702.1121ENSeyed RezaMiraskariFaculty of
Management and Economics, University
of Guilan, Rasht, IranYasserRezaei PitenoeiFaculty of
Management and Economics, University
of Guilan, Rasht, IranJournal Article20250916The purpose of this study is examining the role of Anzali Free Zones incentives in ease of doing business by using the World Bank method and compare it with the situation in Iran in 2019. The ease of doing business is calculated based on 10 indicators, demonstrating that the Anzali Free Zone is ranked 93rd in 2019, better than the country (128). The Anzali Free Zone outdoes Iran in 5 out of 10 indicators of doing business index, including starting a business, dealing with construction permits, getting electricity, paying taxes and trading across borders. The Anzali Free Zone and Iran, however, have similar situations in five other indicators including registering property, getting credit, protecting minority investors, enforcing contracts and resolving insolvency. The incentives and benefits of investing in free zones made the ease of doing business in Anzali Free Zone better than in mainland Iran. In order to improve the ease of doing business index in Iran and the free zone, the relevant rules should be reviewed in order to achieve the goal of creating free zones.<strong><em> </em></strong>It is recommended that officials from relevant organizations, explain the various incentives offered by free zones to domestic and foreign economic activists so that increased investment can provide the basis for increased production and employment for the country.https://cse.guilan.ac.ir/article_9188_72cdafd4e027b4e0b836812466d7533c.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Performance analysis of FET-based Universal gates in multi-valued logic115137914610.22124/cse.2025.31378.1117ENSinaNabiDepartment of Electric Engineering, University of Science and Culture, Tehran, IranAbdalhosseinRezaiUniversity of Science and CultureJournal Article20250812This paper explores the advancements in Multi-Valued Logic (MVL) circuits, contrasting them with conventional binary logic systems. The paper discusses how MVL circuits improves the performance of logic circuits. The focus then shifts to emerging technologies for logic gate design based on carbon allotrope such as CNTFETs and (Graphene Nanoribbon Field Emission Transistors) GNRFETs. The paper analyzes the structure and operating principles of these transistors, providing a comparative analysis of their power consumption, switching speed, scalability, and manufacturing complexity. Specifically, the study investigates the performance of ternary and Quaternary Universal gates implemented using GNRFETs and CNTFETs. Moreover, in this article some other edge of knowledge technology like FinFETs circuits is explored to have a comprehensive view on the performance, advantage and disadvantage of MVL circuits. Results indicate that GNRFET-based designs demonstrate lower delay and significantly better energy efficiency compared to FinFETs and CNTFETs, despite some challenges with higher power consumption in certain GNRFET implementations.https://cse.guilan.ac.ir/article_9146_317ebdadace680e1965044b8edb24103.pdfUniversity of GuilanComputational Sciences and Engineering2783-25035120250401Investigate new soliton type solutions to a nonlinear partial Schrödinger differential equations with the new auxiliary equation approach and its modification139150915610.22124/cse.2025.31755.1122ENSamiraHeidariDepartment of Mathematics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, IranMostafaEslamiDepartment of Mathematics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, IranRohollahYousefianDepartment of Mathematics, NO.c. Islamic Azad University, Noor, IranMohammad EsmaelSameiDepartment of Mathematics, Faculty of Science, Bu-Ali Sina University, Hamedan, IranJournal Article20250922The central and fundamental subject of present research is to investigate the effective method of the new auxiliary equation approach for generalized Schrödinger's equation. Finding solutions to this equation has always been of great importance due to its applications in quantum mechanics and light propagation in nonlinear optical fibers. The results show that the proposed approaches are quite effective and efficient in obtaining exact solutions for nonlinear partial differential equations. Due to the complexity of these equations' calculations, Wolfram Mathematica software has been used to validate the results of the proposed techniques.https://cse.guilan.ac.ir/article_9156_670c5ccf264aa63031e84b43efc094fa.pdf