maximum resistance
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2022 ◽  
Author(s):  
Eliana-Isabel Rodríguez-Grande ◽  
Olga-Cecilia Vargas-Pinilla ◽  
Martha-Rocio Torres-Narvaez ◽  
Nelcy Rodríguez-Malagón

Abstract Objective to evaluate the effects of neuromuscular exercise, specifying the parameters and characteristics of effective interventions to improve balance, muscle strength and flexibility in children with DS between the ages of 4 and 18 years. Data Sources: A search was carried out on PubMed, PEDro, EMBASE, SCIELO, Lilacs, Cochrane library. Study Selection: The search yielded 1384 eligible articles. Randomized clinical trials were selected, and that would have reported the effectiveness in the outcomes. Data Extraction: The methodology and results of the studies were critically appraised in compliance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes guidelines. Data Synthesis: Ten studies were included. The interventions included mechanotherapy, vibration, and use of different unstable surfaces. The exercise frequency ranged from three days to five days a week, and the duration of each session was between six and 15 minutes. The frequency was between two and three times a week for 6 and 12 weeks and the intensity was between 60% and 80% of maximum resistance (MR). Conclusion neuromuscular exercise appears to be effective for the improvement of both lower limb and chest muscle strength and balance in children over 8 years of age.


2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Rintaro Ueda ◽  
Kei Sawata ◽  
Takanobu Sasaki ◽  
Yoshihisa Sasaki

AbstractInformation on the properties of nailed joints with decayed member is necessary to evaluate the remaining structural properties of timber constructions. In this study, loading tests were conducted on nailed joints parallel and perpendicular to the grain with decayed members, and the relationship between the decrease in shear properties and the loading direction to the grain was investigated. After the loading tests, the extent of decay of the specimens was evaluated by the penetration depth of Pilodyn and the decay depth, and these were compared with the shear properties of the nailed joints. The nailed joints with decay had a low load at the initial deformation, regardless of the loading direction to the grain. The initial stiffness, yield resistance, and maximum resistance of the nailed joints parallel to the grain were negatively correlated with the Pilodyn penetration depth, and those of the nailed joints perpendicular to the grain showed no significant correlation with the Pilodyn penetration depth at the 5% level. The initial stiffness, yield resistance, and maximum resistance of the nailed joints parallel to the grain tended to decrease with increasing decay depth, and those of the nailed joints perpendicular to the grain did not exhibit this tendency. The shear properties of the nailed joints significantly decreased at small decay depths.


2021 ◽  
Vol 240 ◽  
pp. 105973
Author(s):  
Ignacio J. Melero-Jiménez ◽  
Elena Bañares-España ◽  
Andreas Reul ◽  
Antonio Flores-Moya ◽  
María J. García-Sánchez

2021 ◽  
Vol 1 (2) ◽  
pp. 41-50

Modeling and simulation of system design adjustment is respectable training for design and engineering decisions in real world jobs. In this paper, the exact perseverance connected with the strain of components is very important for structural designs, analyses, and for excellent control. The information linked to this type of test is usually related to the exact dimensions connected with the pressure within a flexible region. This paper proposed the design and simulation of a torque sensor with a piezoresistive V-shaped strain gauge. The piezoresistive measure of a precious metal for a stable base was made according to the results of an ANSYS simulation. A torque sensor with a piezoresistive V-shaped tension measure on a base was made. The result of the particular simulation shifted the fraction of tension on the base to enable the torque on the substrate to be measured. Theoretical studies on the piezoresistive measure of a metal for the stable base as well as the torque sensor were introduced. A maximum of 127.29 με and a maximum resistance change in gauge equal to 0.091Ω were achieved for an applied torque of 22.0725 Nm. Here, computer systems modeling and simulation are going to be used.


2021 ◽  
Author(s):  
Sayyad Zahid Qamar ◽  
Maaz Akhtar ◽  
Tasneem Pervez

As discussed in Chapter 6, numerical prediction of swelling can be attempted using existing hyperelastic material models available in commercial finite element (FE) packages. However, none of these models can accurately represent the behavior of swelling elastomers. The major shortcoming of currently available swelling models is that they consider Gaussian statistics for mechanical contribution of configuration entropy, which is based on chains having limited extensibility. Some later models (not yet incorporated into commercial FE packages) can give a reasonable account of certain behavior patterns in swelling elastomers, but do not explain other aspects well. One of the new approaches is to treat swelling elastomers as gels. As described earlier, gels are mostly liquid, yet they behave like solids due to a three-dimensional cross-linked network within the liquid. Many authors consider gel as poro-elastic or porous and use Darcy’s law to model the amount of fluid influx. However, a swollen elastomer mostly consists of the solvent. When an external load is applied, maximum resistance comes from the solvent molecules as in diffusion. Also, most of the new models are quite complex in concept and formulation, and there is a serious need for a scientifically simpler model.


2021 ◽  
Vol 81 (3) ◽  
pp. 719-727
Author(s):  
M. A. Abdelaleem ◽  
K. F. Al-Azab

Abstract Six different bread wheat genotypes; two Egyptian commercial varieties (control); Giza-168 and Gemmeiza-11, and four promising lines; L84 and L148, resulted via hybridization and M10 and M34 via radiation mutation program) were rheologically evaluated using extensograph and for protein, analysis using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). The radiation mutant M10 and M34 had the highest maximum resistance which is a very good indicator of strong gluten. The amount of gluten content was higher in M10, L148, and M34 compared to the control samples Gz168 and Gm11. Sulfide amino acids (CYS and MET) are slightly higher in M10. The electrophoretic results and amino acid analyzers show that the best technological quality was exhibited by M10. Radiation mutants wheat genotypes have a protein with good characteristics, mainly gluten which is significantly higher compared to control samples. The rheological properties measured as extensograph and gel electrophoresis were much better in irradiated lines M10 and M34.


2021 ◽  
Vol 410 ◽  
pp. 444-449
Author(s):  
Oleg V. Kudryakov ◽  
Valery N. Varavka ◽  
Dmitriy S. Manturov

Comparative studies of wear resistance during dry friction of vacuum ion-plasma coatings of nitride systems TiAlN and CrAlSiN are carried out. The structural parameters, coating thickness, and physical and mechanical properties were chosen as comparison parameters. A fundamental difference in the wear mechanisms of the coatings is demonstrated. In the TiAlN-system coatings develop an oxidative wear mechanism due to their insufficient heat resistance. The CrAlSiN-system coatings have maximum resistance to plastic deformation. And they are wear out according to the fatigue mechanism, which is typical for coatings with a high level of mechanical properties.


Author(s):  
Thasan Selvakumar ◽  
Rajendran Senthil ◽  
Rajan Raj Jawahar ◽  
Soundararajan Lakshmana kumar

This work was carried out on the buckling effects of cold-formed perforated steel columns with base auxetic polymer stiffeners. Buckling tests were carried out for three thicknesses of steel profiles (1.5–1.8 mm) with and without base stiffeners. Loading conditions were considered to be with displacement variation of 0.1 mm/s and respective axial loads and lateral displacements were noted. Results obtained states that the lateral displacement was found to be 2.2 for 1.8 mm CFS thickness and 93 kN of axial load with the use of auxetic stiffener with 14.8% of the variation in comparison without stiffener. The strain energy of absorption for auxetic stiffener is found to be high as 0.0523 at a lateral load of 80 kN for 1.8 mm CFS thickness. The maximum resistance to local, distortional, and Euler’s buckling loads was found to be high for 1.8 mm thick CFS with stiffener with 11.1%, 17.39%, and 10% in comparison without stiffener.


Author(s):  
V. F. Bezjazychnyj

The justification of the feasibility of determining the cutting modes when processing with a blade tool with optimization to minimize the wear of the cutting wear is given, i.e. for its maximum resistance and at the same time to ensure the required quality indicators of the material of the surface layer of the part after processing. The initial data for the calculation and examples of calculating the cutting mode and surface layer quality indicators are given. Nomograms for determining the cutting modes, taking into account the quality indicators of the surface layer, are of practical interest for technologists of machine-building enterprises.


Author(s):  
Mohammad Hashemzadeh ◽  
Reza Heydari ◽  
Aram Asareh Zadegan Dezfuli ◽  
Morteza Saki ◽  
Hossein Meghdadi ◽  
...  

Abstract Background Burn infection continues to be a major issue of concern globally and causes more harm to developing countries. This study aimed to identify the aerobic bacteriological profiles and antimicrobial resistance patterns of burn infections in three hospitals in Abadan, southwest Iran. Methods The cultures of various clinical samples obtained from 325 burn patients were investigated from January to December 2019. All bacterial isolates were identified based on the standard microbiological procedures. Antibiotic susceptibility tests were performed according to the CLSI. Results A total of 287 bacterial species were isolated burn patients.P. aeruginosa was the most frequent bacterial isolate in Gram-negative bacteria and S. epidermidis was the most frequent species isolated in Gram-positive bacteria. The maximum resistance was found to ampicillin, gentamicin, ciprofloxacin, while in Gram-negative bacteria, the maximum resistance was found to imipenem, gentamicin, ciprofloxacin, ceftazidime, and amikacin. The occurrence of multidrug resistance phenotype was as follows: P. aeruginosa (30.3 %), Enterobacter spp (11.1 %), Escherichia coli (10.5 %), Citrobacter spp (2.1 %), S. epidermidis (2.8 %), S. aureus, and S. saprophyticus (0.7 %). Conclusion Owing to the diverse range of bacteria that because burn wound infection, regular investigation, and diagnosis of common bacteria and their resistance patterns is recommended to determine the proper antibiotic regimen for appropriate therapy.


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