BACKGROUND:Residual hip dysplasia may occur following initial treatment of developmental dysplasia of the hip during infancy or following surgical intervention at an older age. Mild hip dysplasia may also be discovere...
详细信息
BACKGROUND:Residual hip dysplasia may occur following initial treatment of developmental dysplasia of the hip during infancy or following surgical intervention at an older age. Mild hip dysplasia may also be discovered during early childhood. Treatments include modalities such as bracing for less severe cases and surgical intervention for more severe cases. Treatment strategies involving bracing often cease around one year of age as children change ambulatory status and become more mobile. Continued bracing with an ambulation-permitting brace may fill the gap between the common bracing treatments and the advanced need for surgical intervention. This study sought to determine whether the biomechanics of ambulatory abduction bracing have been adequately studied as an alternative to observation for mild residual dysplasia in the ambulatory toddler.
METHODS:This systematic review on the topic was only able to identify seven studies that address bracing of children with developmental dysplasia of the hip while also of ambulatory age.
FINDINGS:Of these seven studies identified, there was very little clinically useful information to provide a basis for ambulatory bracing for mild residual hip dysplasia.
INTERPRETATION:This study motivates the need for future work in this largely understudied area.
The tribological performance of MoS2-Cr films in a pin-on-disk test sliding against an aluminum ball has been examined in this study. The MoS2-Cr films were deposited by pulsed laser deposition (MoS2) and simultaneous...
The tribological performance of MoS2-Cr films in a pin-on-disk test sliding against an aluminum ball has been examined in this study. The MoS2-Cr films were deposited by pulsed laser deposition (MoS2) and simultaneous sputter deposition of Cr, giving a Cr content in the film of 10 mol. %. The results were also compared with films of MoS2 alone. The frictional behavior of MoS2-Cr films was not improved compared to the MoS2 alone, so SEM/EDS studies of the ball and flat were conducted to determine the nature of the transfer films and examine any interface reactions that occurred during the pin-on-disk (POD) test. In the early stages of the POD test (500 cycles) on the MoS2-Cr film, Al-oxide particles formed and caused cratering and scratching of the wear track, and the coefficient of friction neared 0.7. At later stages (9000 cycles), a thick oxide-based transfer film formed on the ball, but on the flat the track composition was closer to that of the original coating. For the films without Cr, after 104 cycles a smooth wear track was observed, and a thin transfer film of MoS2 was found within grooves on the ball wear scar along with Al oxide, which resulted in superior tribological performance.
Composites have been used as the needed material of current interest to curb deficiencies and meeting the ever-increasing demand in science and technology. In this study, production was done by stir casting method and...
Composites have been used as the needed material of current interest to curb deficiencies and meeting the ever-increasing demand in science and technology. In this study, production was done by stir casting method and the mechanical properties of AA606l/clay were assessed. The cast was manufactured with liquid metallurgy route through the reinforcement of 2 - 8 weight percentages of particle sizes of 75 µm clay. The microstructural test such as SEM/EDS and mechanical properties were examined. From the results, the mechanical properties were found to increase at 8 % clay reinforcement. SEM images showed that uniform dispersal of particulates occur in the cast and an increase up to 8 % clay revealed significant blending of matrix and reinforcement as evidenced in the surface morphology study.
We have developed an organ-on-a-chip that incorporates smooth muscle cells (SMCs) and epithelial cells (ECs) of the lung airway into a microfluidic coculture system. This device, termed SELA-Chip, models a lung airway...
详细信息
In this paper the torsional vibration of size-dependent viscoelastic nanorods embedded in an elastic medium with different boundary conditions is investigated. The novelty of this study consists of combining the nonlo...
详细信息
Atomic sized plasmonic tunnel junctions are of fundamental interest, with great promise as the smallest on-chip light sources in various optoelectronic applications. Several mechanisms of light emission in electricall...
详细信息
Vocational graduates supposedly have the competencies following the purpose of vocational education: preparing medium-skilled labor in a particular area that corresponded with the industrial needs. The 21st-century le...
Vocational graduates supposedly have the competencies following the purpose of vocational education: preparing medium-skilled labor in a particular area that corresponded with the industrial needs. The 21st-century learning, among others, was signified with a learning process that optimizing the brain function. In the 21st-century, businesses and industries tend to demand skilled labors in digital literacy, technology literacy, and human literacy. Thus, vocational education should be able to innovate and create to respond to the challenge and opportunity from the 21st-century implication through revitalizing the vocational education, involving learning system, education units, learners, educators, and educational staffs. A suitable learning system for the 21st-century is a life-based learning model. Life-based learning in vocational education could be performed through industrial practice, industrial class, and teaching factory activities. These three approaches aimed to bring the learning activities closer with real-life work at the workplace through field practices. With life-based learning at the real workplace, students would develop a discipline, responsible, teamwork, and work culture habits as provisions after finishing the vocational education.
Hydrogels have demonstrated exceptional prospects for possible uses in medicines, bioprinting, tissue engineering, soft robotics, and flexible electronics due to their distinctive qualities such as porosity, biodegrad...
详细信息
Hydrogels have demonstrated exceptional prospects for possible uses in medicines, bioprinting, tissue engineering, soft robotics, and flexible electronics due to their distinctive qualities such as porosity, biodegradability, hydrophilicity, flexibility, and tuneable capabilities. The evaporation of intrinsic water within the polymeric network, however, makes the hydrogels vulnerable to drying in dry settings and even at room temperature. The hydrogels' widespread applicability is seriously hampered by drying, which also causes a loss of flexibility, hydrophilicity, and dimensional stability. To this purpose, numerous efforts have been made in recent years to develop hydrogels with improved water retention properties. Because salts are hygroscopic, adding salt, for instance, improves water retention. We cover the creation of hydrogels and their dehydration mechanisms in this paper. Additionally, we have highlighted a crucial strategy of salt addition to enhance water retention capacity of hydrogels, whereby this article reviews how specific salts can be added to hydrogels to improve their ability to retain water. Finally, we present the future prospects for hydrogels for their widespread and potential use in various fields.
暂无评论