Intelligent optimal control considering dynamic posture compensation for a cantilever roadheader

The control of dynamic spatial posture for cantilever roadheader is one of the vital problems for intelligent mining, which directly affect the forming quality of cutting tunnel. Therefore, this paper proposed an intelligent optimal combination compensation strategy to adjust the real-time dynamic posture of cantilever roadheader. First, based on the topological structure analysis of cantilever roadheader, the structural loop compensation model for spatial posture deviation was established. Afterward, the principal component analysis (PCA) and multi-objective particle swarm optimization (MPSO) algorithm were applied to improve the analysis speed and accuracy of posture deviation. Finally, parallel dynamic cooperative optimization (PDCO) strategy was combined to achieve the accurate adjusting of posture deviation. The actual experimental and application results indicate that the intelligent optimal combination compensation strategy proposed in the paper can significantly improve the accuracy of the cutting tunnel. The intelligent optimal compensation strategy proposed in this paper transforms the transient spatial posture deviation into structural loop compensation, and implements by parallel cooperative strategy, finally to realize the fast analysis and efficient implementation of spatial dynamic posture deviation for cantilever roadheader during cutting process. The work of this paper provides an effective reference for intelligent deep and remote underground mining, and it can also be applied to effective control of dynamic spatial posture for intelligent engineering machinery products.

Rehabilitation therapy for patients with osteoporosis

Fractures in patients with osteoporosis are attributable to falls and reduced bone mass. Therefore, balance and muscle strength should be improved and bone mass should be increased to prevent fractures. This study aims to investigate a rehabilitation treatment for osteoporosis. Exercise is a potentially safe and effective way to increase bone density and prevent postmenopausal bone loss. Based on bone densitometry results, rehabilitation exercises can be applied variably. Fractures caused by osteoporotic fragility may be prevented with multidisciplinary intervention programs including education, environmental modifications, aids, and individually tailored exercise programs. In addition, strengthening the paraspinal muscles may not only maintain bone mineral density but also reduce the risk of vertebral fractures. Rehabilitation after vertebral fractures includes proprioceptive dynamic posture training that decreases kyphotic posturing through the recruitment of back extensors. This training reduces pain, improves mobility, and leads to a better quality of life. Hip fractures may be prevented by hip protectors and exercise programs that can improve the strength and mobility of patients with hip fractures. Considering the musculoskeletal condition, the spine should be protected using a spinal orthosis, taping, hip pad, and walking aid, if necessary. Efforts to activate programs such as fracture liaison services should also be considered.

Assessing Young Gymnasts’ Dynamic Posture

Functional Movement Screen is an established method of assessing dynamic posture of athletes. Validity and reliability of FMS as a screening tool is debated and one of the foremost criticism is directed at its subjectivity. To the authors’ knowledge, there is no previous research using Kinovea to precisely assess FMS scores. 10 young competitive gymnasts (4 female and 6 male) were included in this study. The participants were scored by an experienced FMS assessor on site as per standard FMS protocol. Afterwards, the same participants were scored again using Kinovea to achieve more objective measurements. Wilcoxon Signed Rank Test for FMS scores versus FMS-Kinovea scores identified FMS test no. 1 (Deep Squat) as significantly different. The median score of Deep Squat assessed on site was 2 (mean value: 2.1), while that same test, scored with Kinovea, had the median score of 1 (mean value: 1.2). Paired Pitman-Morgan test for equality of variances was used to test the dispersion of scores. None were shown to be statistically significant, however, overall FMS score was near significance threshold implying that there is a difference although our power of study was too low probably due to low sample size. We detected significant difference in the scores of Deep Squat test, which is not surprising since it is the most complicated test to asses due to a large number of variables the assessor must evaluate.

How to Select Balance Measures Sensitive to Parkinson’s Disease from Body-Worn Inertial Sensors—Separating the Trees from the Forest

This study aimed to determine the most sensitive objective measures of balance dysfunction that differ between people with Parkinson’s Disease (PD) and healthy controls. One-hundred and forty-four people with PD and 79 age-matched healthy controls wore eight inertial sensors while performing tasks to measure five domains of balance: standing posture (Sway), anticipatory postural adjustments (APAs), automatic postural responses (APRs), dynamic posture (Gait) and limits of stability (LOS). To reduce the initial 93 measures, we selected uncorrelated measures that were most sensitive to PD. After applying a threshold on the Standardized Mean Difference between PD and healthy controls, 44 measures remained; and after reducing highly correlated measures, 24 measures remained. The four most sensitive measures were from APAs and Gait domains. The random forest with 10-fold cross-validation on the remaining measures (n = 24) showed an accuracy to separate PD from healthy controls of 82.4%—identical to result for all measures. Measures from the most sensitive domains, APAs and Gait, were significantly correlated with the severity of disease and with patient-related outcomes. This method greatly reduced the objective measures of balance to the most sensitive for PD, while still capturing four of the five domains of balance.

Effects of TRX Suspensions Training on Functionality, Body Pain and Static Posture of an Elderly Woman: a Case Report

Considerando que o treinamento suspenso (TRX® ST) remete à ideia de um treinamento completo, trabalhando o corpo como uma unidade, acredita-se que sua prática pode trazer grandes benefícios. Nessa perspectiva, objetivou-se identificar o efeito do treinamento suspenso TRX® ST sobre a funcionalidade, a postura estática da coluna vertebral e as dores corporais em geral em uma mulher idosa, a qual foi submetida à avaliação (1) da funcionalidade por meio do protocolo proposto pelo Senior Fitness Test (SFT); (2) das dores corporais utilizando-se o instrumento Informações sobre Dor nas Costas (IDC); e (3) da postura estática da coluna vertebral utilizando o Flexicurva antes do início do treinamento (1ª avaliação) e após a última sessão do treinamento (2ª avaliação). O treinamento suspenso (TRX® ST), composto de exercícios para força e flexibilidade, foi realizado durante 12 semanas, sendo cada semana composta de duas sessões, com duração de até 50 minutos cada. A participante apresentou: (1) melhora da funcionalidade (aumentando de 12 para 19 o número de repetições de sentar e levantar; diminuindo de 5,9s para 4,5s o tempo de sentar e caminhar; e diminuindo de 6cm para 0cm o resultado de sentar e alcançar, no STF), exceto nos membros superiores; (2) diminuição da dor nas regiões dorsal (de EVA intensidade 1 para intensidade 0), lombar (de EVA intensidade 1 para intensidade 0) e de glúteos (de EVA intensidade 2 para intensidade 1); e (3) mudança da postura da coluna lombar, passando de uma retificação (24°) para uma lordose fisiológica (41°). Em contrapartida, os resultados também demonstraram que a postura da coluna torácica não foi alterada pelo treinamento. Tendo em vista que esses são resultados iniciais, se faz necessária a condução de novos estudos a fim de verificar os efeitos do treinamento com TRX® ST sobre as variáveis dor, postura estática e funcionalidade, bem como sobre a postura dinâmica e a qualidade de vida de seus praticantes.Palavras-chave: Educação Física e Treinamento. Idoso. Postura. Dor.AbstractConsidering that suspended training (TRX® ST) refers to the idea of a full training, it is believed that its practice can bring great benefits. Thus, it was [ aimed to verify the effect of suspended training TRX® ST on the functionality, the static posture of the spine and general body pain in an elderly woman. The following were evaluated :(1) funcionality using Senior Fitness Test (SFT) protocol; (2) body pain using a validated questionnaire; and (3) spine static posture using Flexicurve before the training (1st evaluation) and after the last training session (2nd evaluation). The suspended training TRX® ST, that consists of exercises for strength and flexibility, was performed for twelve weeks, in such ways that each week consisted of two sessions, lasting 50 minutes each. The participant presented: (1) an improvement of the functionality (increasing from 12 to 19 repetitions the number of repetitions of sitting and standing up; decreasing from 5.9s to 4.5s the number of sitting and walking ; and decreasing from 6cm to 0cm the result of sitting and reaching up, in STF), except in upper limbs; (2) a reduction of pain in the dorsal, lumbar and gluteal regions; and (3) postural modifications in the lumbar spine, passing from a correction (24°) to a physiological lordosis. (41°). In contrast, the results also showed that the posture of the thoracic spine was not affected by the suspended training in twelve weeks. Since these are initial results, it is necessary to conduct further studies in order to verify the effects of training with TRX® ST on the variables pain, static posture and functionality, as well as on the dynamic posture and the quality of life of its practitioners.Keywords: Physical Education and Training. Aged. Posture. Pain.

Effects of table tennis multi-ball training on dynamic posture control

BackgroundPrior to the 2017 table tennis season, each participant performed the anterior, posteromedial, and posterolateral the star excursion balance test (SEBT) reach distances in a randomized order. The aim of this study was to assess the effects of table tennis multi-ball training and dynamic balance on performance measures of the SEBT for the male and female.MethodsThe limb lengths of the 12 table tennis athletes were measured bilaterally in the study. Besides warm-up end, the data of this study were recorded at a regular interval at approximately 16 min for the entire multi-ball training session, and they were defined as Phase I, Phase II, Phase II, respectively. The Borg rating of perceived exertion (RPE) scale was used to document the degree of physical strain.ResultsReaching distances showed a decrease with training progression in all directions. Compared with the male table tennis athletes, the females showed poorer dynamic posture control, particularly when the free limb was considered with the right-leg stance toward posterolateral and posteromedial directions in phase I.DiscussionThis study suggests that during table tennis multi-ball training the male should have a regulatory protocol to compensate the deficit observed in phase II, but the females should be given the protocol in phase I.