Simulation of a Dummy Crash Test in ADAMS

The article presents a model designed dummy for crash test in ADAMS. The simulated model dummy has dimensions, shapes and mass corresponding to a 50-percentile man. The simulation program allows modification of the dummy parameters. It allows to study the dynamics of motion, distribution of forces and loads of individual parts of the body of the simulated model. The article describes the design process and how to select the appropriate stiffness and damping joints for the simulated dummy. The article contains the results of simulation crash tests performed in the ADAMS program, which were compared to results of the Hybryd III dummy physical crash test. The simulation is designed to reflect the greatest compliance of the movements of individual parts of the human body during the low speed collision.

An Age Simulation Program Promoting Positive Attitudes Toward Older People in Hong Kong: Further Evidence of Integration of Natural Social Network Effects

Purpose This study examines an age simulation program in Hong Kong concerning the possible integrative impacts of an experiential education approach and contact experience within a natural social network among younger individuals. Method: A sample of 1121 younger individuals participated in this study. Structural equation modeling was used to examine the impact of the age simulation program. Results: The results of structural equation modeling indicated the effective impact of the age-simulation program on promoting positive attitudes toward older adults among the younger participants ( β = 0.28, p < .001). The significant results of contact experience highlighted the way in which familial contact experience could bring about more positive attitudes toward the older adults ( β = 0.08, p < .01) than peer group contact can ( β = −0.08, p < .05). Discussion: The protocol of the presented program could provide an actionable framework for social workers and allied professionals to launch related service plans in the communities.

Online Simulation Education for Audiometry Training

Purpose: The purpose of this clinical focus article was to describe a new online simulation program for pure-tone audiometry. Method: Fictional but realistic patient profiles and testing environments were created to teach students about hearing screening protocols and pure-tone audiology. The diversity of the demographics of the United States is represented throughout the program. The web app was created using HTML/JS/CSS with a Flask server backend and MySQL database. Results: The program allows students to learn the process of conducting a hearing screening and measuring audiometric thresholds using a web-based virtual clinical audiometer. The virtual audiometer includes standard audiometer features and allows for instruction based on standard guidelines. The diversity of the patients within the simulation program allows for discussions of diversity to be woven throughout the curriculum. Conclusions: The new simulation program is designed for use as a clinical training tool enabling undergraduate and graduate students to actively participate in hearing screening testing and pure-tone audiometry using any web browser. The program is also designed with the intent to improve pedagogical outcomes at the undergraduate and graduate level for communication sciences and disorders education for pure-tone audiometry by providing instructors with content that focuses on the diversity that is represented in the demographics of the United States.

Analysis and Simulation of Tandem Charge

In the present work, the PG-7 (40mm) anti-tank hollow charge has been developed to double (tandem) hollow charge warhead by using a simulation program. The interaction of the precursor warhead with the Explosive Reactive Armor ERA was studied and the delayed time between the precursor head and the main charge was found which about 50 µs is with 350 mm penetration depth. The effect of precursor charge on the main charge was also studied and this effect was isolated in the delay period, in addition to the effect of precursor warhead jetting on the rear warhead the optimum delay time was found. This study was carried out using the ANSYS AUTODYN simulation program. And the model worked in several ways to reach these goals.

Integral Design of a Turbocharger for Internal Engine Energy Saving: Centrifugal Compressor Design

Energy savings and emission reductions are essential for internal engines. Turbocharger is critical for engine system performance and emission. In this study, the engine simulation program was used to systematically optimize the engine turbocharger system performance. The velocity ratio concept was used in the engine simulation program to consider the performance impacts of the wheel diameter ratio between compressor and turbine. An integral consideration for both compressor and turbine was proposed to design the new turbocharger. An optimization process was used to design the compressor. The final designs employed Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) solvers for the performance and mechanical integrity assessments. The optimized compressor wheel has different features comparing with conventional designs. In this design, the splitter is not located in the middle between main blades; the compressor wheel exit diameter at shroud is larger than hub. The new compressor was tested on both gas stand and engine. The numerical results are fairly agreed with gas stand tests. The tests showed about 1.2% of the engine BSFC reduction without sacrifice the emission and cost. This study demonstrated that a systematic method in simulation and an integral compress design process could optimize the engine system and improve the engine performance.

Influence of bulk defects in SnS absorber layer on optical and electrical properties of solar cell

In this research, the effect of bulk defect on the performance of the solar cell was studied by using the AFORS-HET simulation program. This was done by varying the density of defects including both Acceptor-like and donor-like within the SnS absorption layer. The thickness of the SnS layer was changed from 600nm to 9000nm with the change in bulk defect density in the same layer from (1E10 to 1E17 cm−3). The results showed that when the density of defects is less than 1E14cm−3, it has no effect on the performance of the solar cell, but its effect appears after this concentration, On the contrary, it is the effect of thickness, the results showed that the change in thickness at the defect density of E16cm−3 does not affect on the optical and electrical properties. Also, the results showed that the effect of defects is greatest at low concentrations of Na impurities, and this effect begins to decrease with increasing the concentration of impurities.

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.