An essential tremor (ET) is a disorder that causes involuntary oscillations. ET patients face serious difficulties in performing such daily living activities as eating, drinking, and writing. We have been developing a...
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(纸本)9781479969357
An essential tremor (ET) is a disorder that causes involuntary oscillations. ET patients face serious difficulties in performing such daily living activities as eating, drinking, and writing. We have been developing an exoskeleton to suppress tremors and support the eating movements of ET patients. The objective of this study is to propose a passive mechanism that prevents the appearance of the compensatory shoulder movement without using an actuator. The basic concept of this study is developing the mechanism to coordinate two DoF movement of elbow joint. Two DoF movement of elbow joint is constrained to passive one DoF by our wearable robot. The mechanism of our robot and constrain mechanism is optimally designed to reduce the compensatory movement during eating movement. To develop such mechanism, we first analysed the eating movement to derive the required specification of the mechanism. Then, we proposed a prototype based on the requirement. Finally, we evaluate the effect of the prototype to reduce the compensatory movement. It is confirmed that the proposed prototype had great effect on the reduction. As a future work, we will optimize the structure and the material of the mechanism to reduce the weight of the mechanism.
Implementation of the Energy Related Products directive in September 2015 had focused attention on the condensing boilers more than ever before since they are the unique boiler technology complying with the requiremen...
Implementation of the Energy Related Products directive in September 2015 had focused attention on the condensing boilers more than ever before since they are the unique boiler technology complying with the requirements of this new regulation. The main benefit of condensing boilers comes from the latent heat recovery by condensing the water vapors from flue gas; the higher the condensation fraction, the higher the energy saving is. The experimental study refers on the heat gained and fuel cost saving by condensing water vapors from flue gas in the case of a heating system with two condensing boilers having nominal outputs of 25 kW and 35 kW, respectively. The maximum condensation fraction of the heating system, determined in real operating conditions, was 0.52, which corresponds to an energy saving rate of roughly 2 MJ/m3 of fuel. The cost of the energy saved, converted into fuel saving cost, is 22.28 Euro/1000 m3 for the natural gas price of 426 Euro/1000 m3 (39.9 Euro/MWh or 0.01108 Euro/MJ) in Ia.i, Romania, February 2020.
The cell of today is a typical instrument. It has become a significant "social item," as opposed to only a minor "specialized object," in the regular daily existences of its users. In this article,...
The cell of today is a typical instrument. It has become a significant "social item," as opposed to only a minor "specialized object," in the regular daily existences of its users. In this article, we look at a few ongoing improvements in the examination of mobile phone data. With the developing openness of enormous, anonymised datasets, this field of concentrate previously seemed decade prior and has since formed into an independent subject. The estimating investigation of record framework utilization for a gathering of mobile gadget users in different spots is introduced in this work. The purpose of this research is to refute the notion that mobile system behaviour can be modelled as being uniform across different environments. The research demonstrates that when participants travel between places, they obtain statistically substantially diverse sets of data. These findings call into question how mobile computing systems are normally evaluated, which often models a user's behaviour as being comparable to her behaviour at a single place over a longer length of time.
Increasing networking and digitalization in the industrial framework down to the lowest levels of production processes are the basis and driving force for innovations and changes that go hand in hand with developments...
Increasing networking and digitalization in the industrial framework down to the lowest levels of production processes are the basis and driving force for innovations and changes that go hand in hand with developments in the area of Industry 4.0 and Smart Factory solutions. The classic Product Development Process (PDP) based on Enterprise Resource Planning (ERP) systems appears static and inflexible in the face of increasingly agile and flexible customer requirements. This increasing pressure to optimize, mostly for market reasons, is causing a fundamental change in the global manufacturing landscape in medium-sized and large companies. The implementation of robot systems in an automated manufacturing process must therefore be adapted to this development by a new agile concept [1].
Internal gears with small difference between teeth number are most commonly encountered in planetary and differential mechanisms (eg. on automatic transmissions for vehicles). One of the advantages of this gear is the...
Internal gears with small difference between teeth number are most commonly encountered in planetary and differential mechanisms (eg. on automatic transmissions for vehicles). One of the advantages of this gear is the high transmission ratio. Their parallel axes make this gear perfect for the cases when a small deviation of the distance between axes is required. Automatic transmission allows internal gear function to high speed. In this, we present a short overview of internal gear with small difference between teeth number.
The deposition and coating of thin films onto curved rigid substrate, involving displacement of air by a liquid, has numerous applications within the technology sectors but faces two major challenges: (i) control of t...
The deposition and coating of thin films onto curved rigid substrate, involving displacement of air by a liquid, has numerous applications within the technology sectors but faces two major challenges: (i) control of the local film thickness; (ii) ensuring that the coating remains stable. The work reported here investigates the full coverage of three-dimensional curved geometries, of hemispherical and conical shape, by a continuously fed, gravity-driven, thin liquid layer. The modelling approach adopted utilises a first integral formulation [1,2] of the Navier-Stokes equations leading to a variational formulation in the case of steady flow and an advantageous re-formulation of the dynamic boundary condition at the free surface [3]. Asymptotic analysis, underpinned by the long-wave approximation, enables analytic solutions for the local film thickness to be obtained.
After more than a decade of progress towards Industry 4.0, digitalization continues its steady advance, particularly with regard to the modernisation and digital transformation of existing production facilities. The t...
After more than a decade of progress towards Industry 4.0, digitalization continues its steady advance, particularly with regard to the modernisation and digital transformation of existing production facilities. The targeted use of methods and tools enables systematic planning of a networked factory that takes numerous framework conditions into account. This in turn contributes to the successful fulfilment of operational goals as well as social and economic functions between the physical and virtual worlds. In the course of the digital transformation process, new types of systems are emerging that are becoming more complex, interactive, autonomous and powerful. With the help of cyber-physical systems, physical devices and processes can be equipped with computing and networking capabilities and connected to a data and knowledge structure that is ultimately integrated into the manufacturing process. Manufacturing processes are optimised and adapted through the use of algorithms for big data and advanced technologies. In this dynamic development, self-adaptive, self-learning and autonomous systems can help to successfully overcome the challenges of rapid technological progress and increasing product *** convergence of information technologies and operational technologies is essential to achieve the goal of digitalization in existing industries. This paper provides an overview of digitalization methods in factory planning in the context of Industry 4.0. It describes the common technologies and methods that have been developed over the course of more than a decade of continuous progress in Industry 4.0 and digitalization. A particular focus is placed on the Brownfield and Greenfield approach, which was introduced to software development by Hopkins and Jenkins in 2008. Using these approaches, possible advantages and disadvantages as well as hurdles and challenges in the integration of new systems into existing structures and architectures are analysed and expla
Multiaxial stress states are very common in engineering applications. To obtain a plane stress state in a material are used different experimental procedures. Biaxial tensile tests of cruciform specimens represent one...
Multiaxial stress states are very common in engineering applications. To obtain a plane stress state in a material are used different experimental procedures. Biaxial tensile tests of cruciform specimens represent one of the most versatile techniques with accurate results for a wide range of materials. Specimen geometry and size must be adapted to biaxial experiments that use devices attached to universal testing machine. Biaxial tensile tests are performed using cruciform specimens optimized by a numerical study through finite element analysis and a custom built attachable device developed. The results obtained show that the method proposed in this paper can be used with good results to characterize the behaviour of ductile materials.
In real life experience, machine and structure elements are subjected to complex loading history. Combined loading testes facilitate the understanding of materials behavior subjected to multiaxial stress state. In thi...
In real life experience, machine and structure elements are subjected to complex loading history. Combined loading testes facilitate the understanding of materials behavior subjected to multiaxial stress state. In this paper are presented experimental investigations used to evaluate the influence of an initial type of loading on material properties which will be subsequently tested through another load type. Initial tests are tension tests, by different elongations, and subsequent tests are torsion tests, until break. Circular cross section specimens will be used in these tests. Tension tests have been performed on a universal testing machine. Subsequently torsion tests have been conducted through an attachable device. It was found that the energy associated with plastic deformation obtained by subsequent torsional tests has the dominant influence on the material total plastic energy, although initial test was tension.
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