scholarly journals The Accuracy of the RK-4 and RK-5 Technique as a Numerical Solution to the SEIRS Model of Online Game Addiction on Mathematics Students

2021 ◽  
Vol 2123 (1) ◽  
pp. 012005
Author(s):  
Syafruddin Side ◽  
Abdul Saman ◽  
Nur Rezky Ramadhan ◽  
Sahlan Sidjara
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Quantitative Research ◽  
Secondary Data ◽  
Online Games ◽  
Mathematics Students ◽  
Online Game ◽  
Game Addiction ◽  
Simulation Results ◽  
Runge Kutta

Abstract This study aims to determine the accuracy of Runge kutta order-4 (RK-4) and order-5 (RK-4) as a solution to the SEIRS numerical model for online game addiction in mathematics students at Universitas Negeri Makassar. The model used in online game addiction is the Suspected-Exposed-Infected-Recovered-Suspected (SEIRS). This is a quantitative research with secondary data obtained from a closed questionnaire where students were given several answer choices. It starts by examining the SEIRS model of online game addiction, before determining general solutions using the RK-4 and RK-5 techniques. The model is then analyzed and simulated using RK-4 and RK-5 techniques, which are compared to determine the most accurate one. The results show that the SEIRS simulation model is accurate for predicting the number of online game addictions. Furthermore, the Runge-Kutta technique can be used to observe the trend of increasing cases of online games among students. The numerical simulation showed that the RK-4 technique is more accurate than the RK-5 when the population is larger. The simulation results of the SEIRS model using MAPLE provided an estimated increase in online game addiction that can be used by students and their parents to limit the number of permits associated with launching online games.

scholarly journals Relationship between Online Game Addiction with Depression in Adolescents from 6 High Schools in Indonesia

2020 ◽  
Vol 12 (12) ◽  
pp. 43
Author(s):  
Nikson Sitorus ◽  
Prisca P. Arfines ◽  
Indri Y. Suryaputri
Keyword(s):  
Mental Health ◽  
High Schools ◽  
Psychological Health ◽  
Quantitative Research ◽  
Adolescent Depression ◽  
Online Games ◽  
World Health ◽  
Online Game ◽  
Cross Sectional ◽  
Game Addiction

The World Health Organization (WHO) has defined online game addiction into one of the medical conditions in 2018 under the category of Gaming disorder. Playing online games excessively may be related to both physical and psychological health. The problem of online game addiction and its impact on adolescent’s mental health is still not sufficiently documented. This study aimed to analyze the relationship between online game addiction and depression in adolescents from 6 High Schools in 4 districts/cities of Indonesia. This study is a quantitative research with cross-sectional design as a further analysis of the 2019 School-Based Mental Health Intervention Study. This study involved students of grade 10 and 11 at 6 public high schools in Bogor Regency, Bogor City, City of Central and South Jakarta. The statistical analysis used was multiple logistic regression test. Out of 746 students, 12.9% were depressed and 10.3% were addicted to online games. There was a significant relationship between online game addiction towards depression with OR = 2.44 (95% CI: 1.259-4.735) after being controlled for sex, learning difficulties, age, father's education, and mother's education. Schools are the best institutions that can be used for adolescent depression screening. It is expected that provision of mental health service facilities in school as one of the strategies to overcome online gaming addictions.

High School Students Understanding of the Risks of Online Game Addiction

10.32698/0772 ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 113
Author(s):  
Eryzal Novrialdy ◽  
Herman Nirwana ◽  
Riska Ahmad
Keyword(s):  
High School ◽  
High School Students ◽  
School Counselors ◽  
Sampling Technique ◽  
Online Games ◽  
Average Score ◽  
Online Game ◽  
School Students ◽  
Game Addiction ◽  
Use Of Technology

Adolescents are currently in the midst of technological sophistication, which is very helpful for its development. On the other hand, many adolescents are trapped in the problem of technology addiction. Adolescents are the most age group who experience problems with the use of technology, including online games. Online game addiction is the loss of control over the use of online games, which makes other daily activities are disrupted. Online game addiction in adolescents have an impact on several aspects of life, such as health aspects, psychological aspects, academic aspects, social aspects, and financial aspects. Lack of understanding about the risks of online game addiction can get adolescent stuck in online game addiction. This research aims to describe high school students understanding about the risks of online game addiction. The sample consisted of 255 high school students selected by proportional random sampling technique. Data was collected using a scale measuring understanding of the risks of online game addiction. Data analysis used a quantitative approach with descriptive methods. The results showed that high school students understanding about the risks of online game addiction was included in the moderate category with an average score of 198,48 and an achievement score level of 55,14%. Therefore, school counselors must to improve high school students understanding of the risks of online game addiction.

scholarly journals NUMERICAL SIMULATION OF TSUNAMI CURRENTS

2011 ◽  
Vol 1 (32) ◽  
pp. 6 ◽  
Author(s):  
Eizo Nakaza ◽  
Tsunakiyo Iribe ◽  
Muhammad Abdur Rouf
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Open Channel ◽  
Implicit Method ◽  
Simulation Results ◽  
Moving Particle ◽  
Fixed Structure ◽  
Tsunami Currents

The paper aims to simulate Tsunami currents around moving and fixed structures using the moving-particle semi-implicit method. An open channel with four different sets of structures is employed in the numerical model. The simulation results for the case with one structure indicate that the flow around the moving structure is faster than that around the fixed structure. The flow becomes more complex for cases with additional structures.

A Path Model of School Violence Perpetration: Introducing Online Game Addiction as a New Risk Factor

2015 ◽  
Vol 32 (21) ◽  
pp. 3205-3225 ◽  
Author(s):  
Jae Yop Kim ◽  
Jeen Suk Lee ◽  
Sehun Oh
Keyword(s):  
Child Abuse ◽  
School Violence ◽  
Structural Equation ◽  
Statistical Significance ◽  
Online Games ◽  
Self Esteem ◽  
Path Model ◽  
Online Game ◽  
Game Addiction ◽  
Violence Perpetration

Drawing on the cognitive information–processing model of aggression and the general aggression model, we explored why adolescents become addicted to online games and how their immersion in online games affects school violence perpetration (SVP). For this purpose, we conducted statistical analyses on 1,775 elementary and middle school students who resided in northern districts of Seoul, South Korea. The results validated the proposed structural equation model and confirmed the statistical significance of the structural paths from the variables; that is, the paths from child abuse and self-esteem to SVP were significant. The levels of self-esteem and child abuse victimization affected SVP, and this effect was mediated by online game addiction (OGA). Furthermore, a multigroup path analysis showed significant gender differences in the path coefficients of the proposed model, indicating that gender exerted differential effects on adolescents’ OGA and SVP. Based on these results, prevention and intervention methods to curb violence in schools have been proposed.

Study on the Forming Process of the Crossmember in Car Intermediate Floor

2013 ◽  
Vol 442 ◽  
pp. 593-598
Author(s):  
Xue Xia Wang ◽  
Peng Chong Guan ◽  
Hai Peng Li ◽  
Li Hui Wang ◽  
Na Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Process Parameters ◽  
Thickness Distribution ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Simulation Technology ◽  
Forming Process ◽  
Distribution Diagram ◽  
Simulation Results

Flanging and bending forming processes of the crossmember in car intermediate floor are investigated respectively by using numerical simulation technology. The numerical model of the crossmember was established and its press forming effect was simulated to determine the feasible process parameters affecting its manufacturability. Forming limit diagram and thickness distribution diagram are used to evaluate simulation results of different process schemes. And then optimum values of process parameters for flanging and bending are found, which can reduce the tendencies of wrinkling, springback and crackling during the stamping of the product.

The Optimization of Vibration Induced by a V6 Engine Cooling Module

2011 ◽  
Author(s):  
Ji Yang ◽  
Zhiyong Hao ◽  
Ruwei Ge ◽  
Liansheng Wang ◽  
Kang Zheng
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Automotive Industry ◽  
Optimization Design ◽  
Working Condition ◽  
Steering Wheel ◽  
Engine Cooling ◽  
Simulation Results ◽  
Cooling Module ◽  
Specific Working

The engine cooling module consists of condenser, radiator and fan (CRFM), which has long been recognized as a main source of sound and vibration in the automotive industry. As the engine becomes increasingly compact and powerful, customers gradually have higher expectations for automobile NVH performance than ever before. Thus the reduction of noise and vibration induced by CRFM becomes critical, which can greatly influence overall NVH performance. Combined with experimental and numerical methods, this paper focuses on the identification and optimization of steering wheel (SW) vibration induced by CRFM for a vehicle with V6 engine while engine idling. The numerical model established in this paper, based on Matlab and taking chassis vibration into account, can predict and optimize the vibration of CRFM under specific working condition with the help of energy decoupling and Newmark-Beta methodology. The optimization design of CRFM mainly involves the stiffness, position and angle of isolators. The numerical simulation results are validated experimentally, which can help further design of CRFM.

Numerical Simulation on Hydrogen Dispersion in Automobiles due to Storage Cylinder Failure

2011 ◽  
Author(s):  
Yan-Lei Liu ◽  
Jin-Yang Zheng ◽  
Shu-Xin Han ◽  
Yong-Zhi Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Model ◽  
Hydrogen Sensor ◽  
High Concentration ◽  
Concentration Region ◽  
Species Transport ◽  
Safety Design ◽  
Simulation Results

A numerical model for dispersion of hydrogen in hydrogen powered automobiles was established basing on finite element method with species transport and reaction module of FLUENT. And corresponding numerical simulations were done in order to analysis the dispersion of hydrogen due to leakage from different position of the storage cylinder on the automobiles. Also, the distribution of the hazard region due to hydrogen dispersion was obtained. The simulation results show that the baffle above the cylinder can accumulate the hydrogen. Therefore, the high concentration region of hydrogen exists near the baffle. The study can provide reference for hydrogen sensor placement and safety design of hydrogen powered automobiles.

Numerical Simulation of Different Schemes’ Influence on Coastal Areas for Groundwater-Source Heat Pump Engineering

2012 ◽  
Vol 588-589 ◽  
pp. 1278-1281
Author(s):  
Jun Pan ◽  
Shi Xiao Li ◽  
Chang Liu ◽  
Yang Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Groundwater Flow ◽  
Solute Transport ◽  
Heat Pump ◽  
Seawater Intrusion ◽  
Underground Water ◽  
Coastal Areas ◽  
Simulation Results ◽  
Groundwater Source

More and more people have take more attention on the problem like Seawater intrusion, The same floor recharge and "heat transfixion". This article has established the groundwater flow and solute transport and temperature coupling numerical model,to simulate the underground water temperature’s change by changing the wells’ spacing manner. Simulation results show that the two kinds of disposing Wells solutions are not cause seawater invasion, the second disposing Wells scheme help to prevent the occurrence of seawater invasion.

Dynamic Responses of the State-of-the-Art Floating System Integrating a Wind Turbine With a Steel Fish Farming Cage: Model Tests vs. Numerical Simulations

2021 ◽  
Author(s):  
Yu Lei ◽  
Xiang Yuan Zheng ◽  
Hua-dong Zheng
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Wind Turbine ◽  
Fish Farming ◽  
Dynamic Responses ◽  
Drag Coefficients ◽  
Free Decay ◽  
Floating System ◽  
Simulation Results ◽  
Decay Tests

Abstract This work is dedicated to comparing the experimental and numerical results of the dynamic responses of a novel floating system integrating a floating offshore wind turbine with a steel fish farming cage (FOWT-SFFC) under wind and wave loadings. The patents of this floating system have been successfully licensed recently in China and USA. The experimental study is carried out in the Ocean Basin of Tsinghua Shenzhen International Graduate School, with a Froude scaling of 1:30. A small commercial wind turbine is used to produce the scaled wind loads on FOWT-SFFC in terms of the similarity of thrust force. In this paper, the setup of model tests is described first. Second, a numerical model of prototype FOWT-SFFC is built in the software OrcaFlex. Then, this numerical model is calibrated and updated by the results of free decay tests and static offset tests in the basin. The numerical model also adopts three sets of drag coefficients. Finally, the experimental results of FOWT-SFFC under a variety of load cases are presented and compared with the numerical simulation results. They include seakeeping tests for hydrodynamic motion response amplitude operators (RAOs) and dynamic responses corresponding to normal operating and survival conditions. The numerical simulation results show that, though they are in good agreement with model test data especially on time records of dynamic responses, they are sensitive to the selection of drag coefficients particularly on extreme values and low-frequency spectral contents. Appropriate drag coefficients are suggested to be used in the numerical model for a specific environmental condition. Drag coefficients benchmarked from the free decay tests may not be suitable for moderate and harsh wave conditions.

scholarly journals A Coupled One-Dimensional Numerical Simulation of the Land Subsidence Process in a Multilayer Aquifer System due to Hydraulic Head Variation in the Pumped Layer

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Ye Wang ◽  
Mao-sheng Zhang ◽  
Fu-sheng Hu ◽  
Ying Dong ◽  
Kun Yu
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Land Subsidence ◽  
Transition Period ◽  
Pressure Head ◽  
Hydraulic Head ◽  
Confined Aquifer ◽  
One Dimensional ◽  
Aquifer System ◽  
Simulation Results

After exploitation of groundwater had been reduced and the groundwater level of the confined aquifer had risen, land subsidence was observed to continue rather than cease for several years according to the layer-wise mark monitoring data in Xi’an. To analyze the phenomena, a numerical model of a coupled one-dimensional multilayer aquifer system is developed to represent land subsidence due to hydraulic head variation in the pumped layer. The numerical simulation results show that the pressure head in other layers does not rise immediately when the hydraulic head in the pumped layer starts to recover after pumping ceases. In addition, after the pumping is stopped, a dividing point can be found in aquitards next to the pumped layer, with the aquitards being divided into two parts: a compressed part and a rebounding part. The dividing points move toward the side and away from the pumped layer with the transferring of pore pressure in the aquitard. The results of the simulation also show that there is a transition period between land subsidence and rebound. In this transition period, land could continue to subside even though the hydraulic head in the pumped layer begins to recover.

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