Application Of Simulation Method Research Articles

Simulation training of interns-pediatricians: assessment and stabilization of urgent conditions in neonatology

The article presents the results of applying stimulation technology in basic training of interns on specialty “Pediatrics” on giving urgent aid in case of neonatal asphyxia. Objective: to analyze the efficacy of introducing the elements of simulation training of interns on specialty “Pediatrics” at the Department of Pediatrics and Children Infectious Diseases, Higher State Educational Establishment of Ukraine “Bukovinian State Medical University”. Materials and methods. The authors share their experience in introducing approaches to assessment and stabilization of condition of a neonate with severe asphyxia applying simulation methods of training. Results. The interns admitted a high efficacy of simultaneous learning theoretical material and mastering practical skills on a simulation mannequin. The results of testing in “KROK-3” frame were found to be higher after simulation practice and its discussion (on an average 80,5% in comparison with 72,2% before training).Conclusions. In training interns’ skills of urgent aid given to neonates both clinical protocols developed on the evidence-based principals and modern simulation technologies are reasonable to be used.

ИМИТАЦИОННОЕ МОДЕЛИРОВАНИЕ В ЗАДАЧАХ УПРАВЛЕНИЯ ЗАПАСАМИ

The application of simulation methods in the problems of inventory management is
 shown. Machine simulation includes the problem formulation, model building, preparation of a computer
 program, an assessment of the reliability and realism of the process under study, analysis of results and
 decision-making.

Application of Computer Simulation Method in Deep Underground Engineering of Complicated Geological Condition

Computer simulation technology is used to solve various engineering problems in the new century, particularly exemplified by the widespread use of numerical simulation research methods. Due to the complicated geological environment, a mine tunnel with a depth of 850 m in Hebei Province has caused various problems, such as large displacements and difficulty in implementing support schemes. However, the complex geological conditions make the project unique, and support schemes for other projects cannot be simply copied. In addition, due to engineering cost requirements, repeatedly evaluating different on-site support schemes is unacceptable. Therefore, it is necessary to obtain an appropriate support scheme through computer simulation technology. Consequently, by implementing FLAC3D software and using the progressive design method (PDM), a variety of support schemes are designed, and simulation tests, such as analysis and optimization of parameters, are performed. The research results show that through the analysis of stress, displacement and other aspects of the various schemes designed by using PDM, the finally selected scheme that was applied to the actual project achieved good results. The findings have proven the feasibility of the method, and the method can guide engineering problems under similar geological conditions.

Simulation Modeling Methods and Tools in the Study of Electronics Preproduction

The paper is devoted to the selection and application of simulation methods and tools when creating a digital model of the production floor and the preproduction of the assembly process of electronic modules on printed circuit boards. The advantage of simulation modeling for creating a digital manufacturing model is shown. The introduction of simulation methods in the educational process is considered. Using the developed digital model for the manufacturing of a typical product as an example, the functional capabilities of the Plant Simulation module from the Tecnomatix software package developed by Siemens PLM Software are considered. The main simulation results in terms of productivity of the designed production floor are considered. The digital model was improved in order to increase the technological equipment utilization rate and the total productivity of the assembly floor.

Remaining Life and Corrosion Rate Prediction of Well Casing Material in the CO2 Environment

Prediction of CO2 corrosion is required for predicting remaining life and determination of the required material selection. This paper give prediction of corrosion rate and remaining life of casing in the North Aceh well which is operated almost 14 years. Simulation method application is appropriate with the condition of North Aceh field since the well fluids contain high CO2 gas (35 – 37%) and small amount of H2S gas (0.016%). Based on historical data North Aceh well’s after production almost 14 years, it is possible that production packer leaks and degradation of cement could cause formation gas migrate through micro channelling inside cement. The CO2 gas which is accumulate in casing could cause CO2 corrosion. The corrosion rate calculation based on temperature 141°C, pressure 103.4 Barg and CO2 contain 37% is 0.871 mm/year. After calculating the thickness loss, we found thickness loss of casing K55 is 12.741 mm. meanwhile thickness of K55 casing 10.92 mm, it means the casing already leak before year 14th. Based on simulation and calculation the North Aceh well is assumed to have tubing and packer leaks in annulus #0 and channeling on annulus #1 so that the well is not recommended for re-production because of the communication between the annulus and the loss of the well barrier that can cause wellhead leakage. This condition is very dangerous because the well fluid is flammable and can cause pollution in the sea.

CFD simulation and measurement of the thermal behavior inside a room of the institutional library: a comparative study

Abstract This article presents the results of the comparison between the CFD simulation and temperature measurements, both in the time domain, at a certain point of interest within a specific closed space (cubicle) of the institutional library of the Salesian Polytechnic University (UPS), at its headquarters in the city of Cuenca, Republic of Ecuador. In this specific case, solar radiation is considered as the main heat transfer mechanism, which is why it was considered in the applied simulation method. An acceptable relative error was obtained between the simulated and measured temperature values. During the summer period, the thermal conditions inside the cubicle are not suitable for the comfort of the users. The study developed can constitute a basic tool for possible future research related to the implementation of climate conditioning for the cubicle, the library in general and any other site with similar constructive and operational characteristics.

Numerical study on the internal and external flow field of dust explosion venting

Explosive pressure relief is often used in process industries to reduce the hazardous effects of dust explosion in the conveyance pipeline. The effectiveness of venting and the conditions associated with the explosive dust cloud and venting area, however, have not been studied. In this research, aluminum dust explosion venting was modeled by a two-dimensional (2D) rotational-axis symmetric computational fluid dynamic (CFD) model. The simulations focused on the effect of vent size on the pressure development and flame behavior inside and outside the pipeline. The internal pressure and temperature decreased sharply with venting. The internal pressure rose after the explosion venting, but this increase was reduced as the venting coefficient Kv (Kv = Sv/Sp) increased. The external explosion damage range caused by the venting pressure expanded as Kv increased. The applied simulation method and results of this study provide critical information for dust explosion venting design safety and protection in chemical engineering.

ANALYSIS AND EVALUATION OF FISCAL POLICY IN LATVIA

The choice and topicality of the research topic is based on the fact that upon strengthening of the government's regulating role in economy, the notion of public finances positions itself, and state budget has become an important subject of both economic and political discussions as implementation of fiscal policy is takes place through it. In order to evaluate fiscal policy, it is necessary to evaluate the potential influence of different fiscal policy instruments on social and economic situation in the state. Aim of the research – to evaluate activities of fiscal policy implemented in Latvia in context of certain tax, namely, influence of corporate income tax on state's economic and financial indicators, identifying the main risks and imperfections of fiscal policy when ensuring state's budget. Applying simulation methods in the environment of Matlab/Simulink, the authors analyze and evaluate the influence of fiscal decisions and their implementation on the situation in Latvia, analyzing the most important tendencies in the sphere of corporate income tax payments according to the tax reform commenced in 2018.

Study on braking process of vehicles at the signalized intersection based on car-following theory

It is necessary to study the braking process of the vehicles moving on a road with a series of signals. Due to the influence of traffic signals, the normally moving vehicle may suddenly decelerate when the signal turns red. In this paper, we present an improved optimal velocity model to describe the moving vehicles’ behaviors on signalized road. Particularly, the applicability scope of our model is discussed. We apply simulation methods to evaluate our model. The results demonstrate that our model describes braking process more accurately. Moreover, it should be pointed out that the proposed model exhibits the feasibility in traffic flow simulation on signalized road

PENERAPAN METODE SIMULASI UNTUK MENINGKATKAN HASIL BELAJAR SENI TARI SISWA DI KELAS VIII.6 SMP NEGERI 7 PADANG

AbstractThe article aims to describe the application of simulation methods to improve the learning outcomes of dance in class VIII.6 of SMP Negeri 7 Padang. This type of research is Classroom Action Research (CAR) or Classroom Action Research. The instrument of this study was the researchers themselves and assisted with supporting instruments in the form of observation sheets of student learning activities, knowledge tests (cognitive) and skills tests (psychomotor). The data collection technique used in each cycle is by observing, testing and documenting. The types of data in this study are primary data and secondary data. Student learning outcomes data were analyzed using mean techniques and using individual and group completeness criteria. The results of the study show that the application of simulation learning methods can improve the learning outcomes of Dance VIII.6 grade students at Padang 7 Public Middle School. Learning activities consist of positive activity and negative activity. Positive learning activities are with indicators asking questions, daring to argue, and doing assignments. Negative learning activities that are with indicators do not concern in class and do not go out of class. Learning activities in the first cycle were still low seen in positive activity 62% and negative activity 61%. While the second cycle obtained an average of 85% positive learning activities and negative learning activities 89%. The average learning outcomes in the first cycle were obtained 82 and the average learning outcomes in the second cycle were 89.4. So it was concluded that the application of simulation methods to improve the learning outcomes of Dance in class VIII.6 students at Padang 7 Junior High School had succeeded.Keyword: Application of simulation method, the results of the study, the art of dance

The Effectiveness of Simulation Methods on Prospective Teachers’ Professionalism in Science Learning

Professionalism in teaching is needed in the Curriculum 2013. As many as 54% of the 68 students stated not yet familiar with the scientific approach. The average value of didactic concept mastery is 55 under the minimum completion criteria. The objectives of this research are to (1) test the effectiveness of the application of simulation methods on the professionalism of prospective teachers; and (2) analyze student responses. The research design is Posttest Only with Non-Equivalent Control Group Design. Data of the simulation method was analyzed by a descriptive method. One sample t-test is used to know the achievement of the average mastery of pedagogic competence. The Independent t-test was addressed to know whether the average value of professional competence of the experimental class is higher than the control class. The response was analyzed by Likert scale. The result of the research shows that: (1) the simulation method of science learning on the professionalism of prospective teachers in IAIN Kudus is effective; and (2) Student response to the positive simulation method is 79,00% from 31 students.

Application of simulation methods to optimize the composition of technological complexes of machines

The paper proposes a method for determining the optimal parameters of technological systems in environmental management, based on the principles of automated support for organizational decision-making during the formation of production structures and effective technological complexes of machines. The technique is based on simulation modeling of various options for the implementation of the process using a multi-agent approach

Evaluation of Methods for Electric Field Calculation in Transmission Lines

This paper has the purpose of evaluating the application of computer simulation methods for characterizing the distribution of the electric field generated by power transmission lines. Analysis through computer simulation with the charge simulation method and the finite element method are performed for a comparison with measured practical data obtained from a 525 kV power transmission line, located in the Southern area of Brazil. The comparison methodology is quantitative and based on concepts of the literature. The results show a difference between the methods, and this difference can characterize the limiting exposure to the electric field, as is show in this paper.

A Survey of Reporting Practices of Computer Simulation Studies in Statistical Research

ABSTRACTComputer simulation studies represent an important tool for investigating processes difficult or impossible to study using mathematical theory or real data. Hoaglin and Andrews recommended these studies be treated as statistical sampling experiments subject to established principles of design and data analysis, but the survey of Hauck and Anderson suggested these recommendations had, at that point in time, generally been ignored. We update the survey results of Hauck and Anderson using a sample of studies applying simulation methods in statistical research to assess the extent to which the recommendations of Hoaglin and Andrews and others for conducting simulation studies have been adopted. The important role of statistical applications of computer simulation studies in enhancing the reproducibility of scientific findings is also discussed. The results speak to the state of the art and the extent to which these studies are realizing their potential to inform statistical practice and a program of statistical research.

The Application of Simulation Method in Isothermal Elastic Natural Gas Pipeline

This Elastic pipeline mathematic model is of crucial importance in natural gas pipeline simulation because of its compliance with the practical industrial cases. The numerical model of elastic pipeline will bring non-linear complexity to the discretized equations. Hence the Newton-Raphson method cannot achieve fast convergence in this kind of problems. Therefore A new Newton Based method with Powell-Wolfe Condition to simulate the Isothermal elastic pipeline flow is presented. The results obtained by the new method aregiven based on the defined boundary conditions. It is shown that the method converges in all cases and reduces significant computational cost.

An Innovative Simulation-based Community-engaged Intervention for Training Research Assistants in Culturally Appropriate Informed Consent

Background Enrolling under-represented groups in biomedical research remains challenging owing to limited health literacy, historic medical abuses, and mistrust. Addressing such barriers requires scrutiny of informed consent processes and training of research assistants (RAs). Applying simulation methods that are well-established in medical education, Simulation-based Community-engaged Research Intervention for Informed Consent Protocol Testing and Training (SCRIIPTT) engages community members as community advisors (CAs) to train RAs in implementing culturally appropriate approaches, such as addressing difficult issues related to race and power dynamics, into the informed consent training process. Objectives To present SCRIIPTT's development, implementation, and preliminary findings. Methods Over 12 months, our community-academic partnership 1) introduced SCRIIPTT to the greater community using the Truth a Reconciliation Model, which acknowledges the wrongs of research and offers an apology; 2) deepened understanding of community concerns; 3) developed the intervention; 4) conducted a pilot; and 5) disseminated findings. Results SCRIIPTT included a comprehensive training manual, scenarios for simulated informed consent encounters, and a 37-item checklist to measure performance. Outcomes include CA and RA satisfaction surveys, and RA performance rating. The checklist adequately measured observable behaviors. RAs reported important gains in knowledge, self-confidence, and cultural competence in conducting informed consent. CAs reported positive experiences, being fully engaged and valued as members of the research team and participants during simulation encounters. Conclusions This pilot study demonstrated the feasibility of SCRIIPTT, with preliminary evidence of effectiveness and acceptability. SCRIIPTT offers an innovative approach for community engagement in research training and advancing the skills of RAs in culturally appropriate informed consent.

Applicability of simulation methods for solving the optimization problem of a specialized automotive fleet for solid municipal waste collection and removal

Applicability of simulation methods for solving the optimization problem of a specialized automotive fleet for solid municipal waste collection and removal

A study of the ability of the deformation of titanium sheet by hot single point incremental forming technology

Hot Single Point Incremental Forming (HOT SPIF) is a new technology of forming a metal sheet at high temperatures, especially for hard, high strength materials that are difficult to perform at normal temperatures such as Titanium and other materials. The paper presents the application of simulation method to determine the ability of the deformation of Titanium sheet through the angle of deformation αmax of the lateral profile of the model under the influence of tool diameter D (mm), step in the direction z of the tool VZ (mm), the velocity of the tool Vxy (mm/min), the temperature T(0C). The content of this paper consists of the analyzing the influence of these 4 above parameters by building a finite element analyzing (FEA) model to determine the ability of deformation or the maximum lateral angle of forming and to compare the accuracy of FEM model to the one of Computer-aided design (CAD) model. The paper studies the influences of the 4 parameters to the ability to form of Titanium sheet by HOT SPIF.

A comprehensive molecular dynamics study of a single polystyrene chain in a good solvent

In this study, molecular characteristics of polystyrene (PS) was calculated measuring its dilute-solution properties in toluene at 288.15 K via molecular dynamics (MD) simulations. The solution models consisted of PS chains with different number of repeating units all of which were in a dilute regime. In order to investigate the compatibility between the polymer and the solvent molecules, interaction energy and Flory-Huggins (FH) interaction parameter were estimated. The simulation results indicate that increasing the chain repeating units enhanced the interaction between the solute and the solvent. Additionally, the chain dimensions were evaluated calculating the radius of gyration (Rg) and end-to-end distance, r0. To determine the dynamic behavior of the chains in the solutions, mean square displacement (MSD) and diffusivity coefficient were calculated. The simulation results indicated that the chain rigidity at low molecular weight and chain flexibility with increasing the molecular weight influenced chains dynamic behavior and diffusivity. Moreover, radial distribution function (RDF) illustrated the effect of steric hindrance of the chains in dilute solution on capturing the solvent molecules. In addition, solution viscosity was calculated by performing non-equilibrium molecular dynamics simulation (NEMD). The obtained results of chain characteristics and viscosity showed a good agreement with experimental results published previously. This agreement confirms the accuracy of the applied simulation method to characterize the dilute solutions and the chains characteristics.

The Impact of the Availability of Resources, the Allocation of Buffers and Number of Workers on the Effectiveness of an Assembly Manufacturing System

AbstractThis paper proposes the application of computer simulation methods in order to analyse the availability of resources, buffers and the impact of the allocation of workers on the throughput andwork-in-progressof a manufacturing system. The simulation model of the production system is based on an existing example of a manufacturing company in the automotive industry. The manufacturing system includes both machining and assembly operations. Simulation experiments were conductedvis-à-visthe availability of the different manufacturing resources, the various allocations of buffer capacities and the number of employees. The production system consists of three manufacturing cells –each cell including two CNC machines– and two assembly stations. The parts produced by the manufacturing cells are stored in buffers and transferred to the assembly stations. Workers are allocated to the manufacturing cells and assembly stations, but the number of workers may be less than number of workplaces and are thus termed ‘multi-workstations’. Using computer simulation methods, the impact of the availability of resources, the number of employees and of the allocation of buffer capacity on the throughput andwork-in-progressof the manufacturing system is analysed. The results of the research are used to improve the effectiveness of manufacturing systems using a decision support system and the proper control of resources. Literature analysis shows that the study of the impact of buffer capacities, availability of resources and the number of employees on assembly manufacturing system performance have not been carried out so far.