Computer simulation to predict size distribution of track-etched nanopores

Track-etched nanoporous membranes prepared by swift heavy ion irradiation are promising for separation processes such as water purification. However, one drawback is that multiple pores are undesirably formed by pore overlapping to reduce separation performance. The techniques for predicting the size and amount of multiple pores in detail are still underdeveloped, which hinders the precise membrane design. In this study, a computer simulation program was developed to predict the size distribution of the track-etched pores. The program generates a number of single pores on the virtual grid plane to simulate random ion bombardment, finds multiple pores containing several single pores, and determines the multiple pore size by counting the inside grid points. All the multiple pores are categorized into different size classes, and the areal percentage occupied by the pores belonging to each size class is estimated. The simulation algorithm and the results of a model case simulation were described.

DEVELOPMENT AND IMPLEMENTATION OF COMPUTER-GENERATED SIMULATION PROGRAM FOR FORECASTING OF THE TEMPORARY DISABILITY DURATION IN CASE OF MAXILLOFACIAL REGION DISEASES AT DENTAL MEDICAL ORGANIZATIONS

Subject. digital technologies used by the service of examination of temporary disability associated with a dental disease and their adoption in dental medical organizations of the Republic of Tatarstan. The aim — to develop a computer simulation program for predicting the duration of temporary disability associated with a dental disease. Results. Odontogenic inflammatory processes, which were identified in 66.1% of the cases, represented the largest proportion of causes of temporary disability in patients of dental medical organizations. Maxillofacial traumas took the second place with a proportion of 13.9% of all the causes. Diseases related to loss of teeth due to extraction were identified in 384 patients, or in 7.4% of cases, and took the third place. The authors of the study determined the duration of temporary disability for each category of dental disease in the Republic of Tatarstan, the average duration of which was 8.48 ± 0.04 days. Based on clinical statistical analysis, a matrix was created for predicting the duration of dental diseases leading to temporary disability represented by a computer software for dental medical organizations. Conclusions. Dental diseases in patients are related to the cases where treatment and rehabilitation are provided by several medical organizations; the authors created software for dentists, which predicts the duration of cases, their statistical analysis, eliminates errors in the issue of sick leave certificates, draws standard reporting statistical documents in order to provide reliable information on the state of the economically active population, to plan preventive activities, appropriate comprehensive treatment and rehabilitation of patients.

Teaching physics with interactive computer simulation at secondary level

Early research investigated the students understanding of science concepts using physical equipment, such as visiting labs and performing experiments but due to the advancement of new technology, students now can learn complex science concepts through advanced means, such as iPad, smart books and simulations. In Pakistan, interactive computer simulation program is rarely used for teaching at the early ages. The aim of the present study is to evaluate the effectiveness of the interactive computer simulation program PhET to teach weight and mass concepts to high school students. Quasi-experimental design was used to study the effect of the interactive computer simulation on students’ physics concepts. Study also explored the student’s engagement with simulation to exercise high order thinking skills. The experimental group was taught with the interactive computer simulation program, and the control group was taught with traditional teaching method. There were five lessons each week, and the program was used for a month. Pre- and post-tests were designed for both experimental and control groups. Independent sample t-tests showed that the difference was significant between the mean scores of the experimental and control groups after the experiment (p

Development of production technology of rolling stock cast parts

Using the computer simulation program ProCAST, the analysis of the processability of the gating system used in the current production of the SK “Foundry-Mechanical Factory” in the manufacture of large cast parts of railway rolling stock was performed. Based on computer modeling, a new design of a gating system with a dispersed metal motive with different sizes of feeder sections was developed, providing simultaneous parallel filling of all parts of the mold cavity. The feature of the proposed design of the gating system is the presence of an extended horizontal collector and the supply of metal to the end parts of the casting. With this design, two counter-flows are formed in the mold cavity, their fusion occurs in the middle part of the casting in a cooled and highly polluted state, since during the filling process, the head part of the flow collects sand inclusions along the way, is oxidized and saturated with hydrogen. These factors are a prerequisite for the formation of various defects in castings.

A New Method for Modeling the Cyclic Structure of the Surface Microrelief of Titanium Alloy Ti6Al4V After Processing with Femtosecond Pulses

A method of computer modeling of a surface relief is proposed, and its efficiency and high accuracy are proven. The method is based on the mathematical model of surface microrelief, using titanium alloy Ti6Al4V subjected to processing with femtosecond pulses as an example. When modeling the examples of microrelief, changes in the shape of segments-cycles of the studied surface processes, which correspond to separate morphological formations, were taken into account. The proposed algorithms were realized in the form of a computer simulation program, which provides for a more accurate description of the geometry of the microrelief segments. It was proven that the new method significantly increases the efficiency of the analysis procedure and processing of signals that characterize self-organized relief formations.

Performance Analysis of the the Single Alarm Detector in the Rooms of Single Houses by Computer Simulation

This study was conducted to examine the performance in the space for a single alarm type detector installed in a single house. Three types of houses were used, including two types of one-story and two-story houses. A computer simulation program was used to predict the sound pressure level in response to the occurrence of an alarm sound in a residential space. The characteristics of the sound source applied to the simulation were directly measured and used as input data. As a result of simulation, it was found that the sound pressure level in the kitchen and living room generally met the standard when the alarm sound of the detector occurred. However, the sound pressure level in the bedroom was predicted to be at least 20 dB (A) lower than the American Fire Protection Association standard of 75 dB (A). Therefore, a plan should be prepared to maintain a sufficient sound level in the bedroom space inside the house, and efforts will be needed to ensure safe evacuation in case of fire by establishing relevant standards.

The Emergence of Transdisciplinary Research and Disaster Science

This article intends to bring attention to the emerging specialty of disaster science (DS), as well as to introduce a newly created system of computer simulation to facilitate transdisciplinary integration that would allow for the interphase of computer simulation platforms developed by scientists in the different professions engaged in the study of disasters. The next section discusses the origins of DS and the characteristics of the scientists using the concept, then reviews of some of the DS interpretations, then presents systematicity, a new philosophy of science perspective that allows for the methodical comparison of the various disciplinary specialties interested in the study of disasters, and that can facilitate the creation of a transdisciplinary style of research. The article concludes with the description of the computer simulation program Simple Real-Time Infrastructure, which is designed to facilitate transdisciplinary collaboration.

Evaluasi Perhitungan Dimensi Tulangan Balok Terhadap Analisa Struktur Pada R6 Portal As-32 Proyek Pembangunan Ruko Citraland Bagya City Medan

<p><em>In the planning of multi-storey construction buildings need to pay attention to all aspects that affect the structure of the building and consideration of mature, especially if a multi-story building is designed to withstand earthquakes, the structure considerations will affect the planner in determining alternative planning. Multi-storey building planning needs to pay attention to several criteria, including strength criteria, good structural behavior at the stage of the earthquake plan as well as economical aspects. Discussion topics focused on the comparison of reinforcement plan beam dimension to structural analysis. The purpose of this report is to know and control how the calculation of flexural repetition on the beam structure. For solving this problem a case study is provided that provides theoretical information and analysis. Information in the form of data is processed through computer simulation Program Structure Analysis. Above modeling is made, analyzed to obtain results and discussed for calculation of beam reinforcement dimension ratio. The result of calculation obtained from comparison of reinforcement dimension of portal structure of AS-32 port obtained less amount of reinforcement result of calculation from amount of reinforcement used in field with max comparison value 33%, the difference happened because different assumptions or methods in the calculation analysis.</em></p>