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the paper reported about new practical system for 3D three dimensional (3D) nano-manipulation. The system consists of advanced high precision nano-manipulators based on piezoelectric resonance motors and end-effectors. The end-effector is the bimetallic composite nanotweezers based on Ti2NiCu alloy with shape memory effect. This nano-tweezer is easy in use micron-size nano-tool controlled by semiconductor...
Observation and evaluation of damage growth on contact surfaces caused by arc discharges are important for realizing better understandings of contact phenomena. For that purposes, an experimental system enabling observation and evaluation of growth processes of a crater or a pip (damage shapes) during switching operations has been constructed. Up to now, evaluation of a movable cathode surface profile...
The Copper-Chromium (CuCr) contact material is the most widely used material for the contacts of the vacuum interrupters (VI). Performance of the VI is greatly influenced by the properties of contact materials. During switching operations, such as short-circuit current interruption, a vacuum arc is generated which in turn produces melted and resolidified layers at the contact surface. Melting followed...
Vibration attenuation by means of tuned mass dampers is a common practice in engineering since many years. Usually, their dynamic features are chosen so that a tuning on the modal characteristics of the system to control is achieved. Although such components can be very effective in reducing vibrations, they suffer of some drawbacks. The main one is that they cannot change their dynamic features in...
The electronics packaging in microsystems technology for medical applications includes various tasks. The interdisciplinary approach is the most important basis for the success of a product. For the reliable operation of medical microsystems different factors must be considered. The functionalization of a catheter depends on different influence factors. The form factor takes the most important role...
A keyword-based query is not sufficient for retrieving presentations. We assume that episodic memories about authoring slides and giving a presentation can be used for query because users easily recall and recognize slides associated with such memories. In this study, we present slide retrieval based on research episode networks that are a network composed of slides, episodic information and the links...
Pollen tube growth is an essential part of the sexual reproductive process in plants. It is the result of a complex interaction of cytoplasmic contents (proteins, ions, cellular structures, etc.). Existing pollen tube models use differential equations to represent these complex intra-cellular interactions that lead to growth. As a result of this complex nature, these models are not used to verify...
3D Printing or Additive Manufacturing (AM), refers to a new class of technologies of making products directly from any three-dimensional digital models. Broader applications of AM require to lower the cost of AM machines. However, products fabricated by low-end machines suffer from the issue of low dimensional accuracy. In this paper, we intend to address this issue for Fused Deposition Modeling (FDM)...
Comfort, appearance and price are important factors for users when purchasing a pair of new shoes. And shoes comfort is more and more emphasized with the improvement of people's quality of life. But there do not exist any standards for shoes comfort. In this paper, a fuzzy comprehensive evaluation model is studied based on the evaluation index system of shoes comfort. The result shows that the fuzzy...
A proper seating is important as an aid for cerebral palsy patients, and has good influence on patients' physical conditions and mentalities. Deformity of spine causes gaps between their backs and backrests of wheel chairs. Generally, urethane cushions are used to fill up the gaps. However, this method cannot handle their dynamic motion that will happen in daily life. In the previous study, we developed...
A Terahertz planar periodic structure (engineered material), which shows several sharp Fano resonances, is introduce. These resonances are due to the small asymmetries of the structure which allow excitation of trapped modes. These sharp resonances can be used for biomedical sensing applications. HFSS simulation results are presented.
This paper deals with miniaturization of wearable electro-textile antennas by the use of Minkowski fractal geometries. Two electro-textile materials namely Flectron and Zelt are considered for the design of flexible microstrip antennas. In both cases, polyester fabric material has been employed as dielectric medium. In the basic design both the antennas are designed for WLAN applications. The Flectron...
A single few-layer graphene (FLG) sheet is synthesized on a tungsten tip by using microwave plasma enhanced chemical vapor deposition method. The sheet density of FLG on a tungsten tip is controlled by the substrate surface structure and local plasma density. This method provides a new way to fabricate a field emission point electron source.
Laser Metal Deposition (LMD) is an additive manufacturing process whose dynamics are driven by complex heat transfer and fluid flow phenomena. The LMD process, along with every additive manufacturing process, is fundamentally a two-dimensional process possessing both temporal (or spatial) domain dynamics and propagation of information from layer to layer. However, modeling the two-dimensionality of...
The analytical solution of a plane problem for a bimaterial plane with a crack in the shape of the circular arc located near an interface is obtained. On the crack edges external load is applied. At infinity stresses and angles of rotation are given. Method of complex potentials of Kolosov — Muskhelishvili together with a superposition method is used for solving the problem. The boundary problem is...
Multi-Material Rapid Prototyping (MM-RP) is a promising fabrication process for compliant mechanisms, for instance when compactness is a concern. The Pseudo-Rigid Body Model (PRBM) approach is well-known for the synthesis of compliant mechanisms. It is usually based on the use of compliant joints to provide the mechanism mobilities. In this paper, we propose the HSC joint as a new type of revolute...
The Chinese genebank contains 6169 wild soybean (Glycine soja) accessions collected from 25 provinces. In this study, leaf shape and a suite of other morphological characteristics were analyzed in order to examine the relationship between leaf shape and other characteristics of wild soybeans. The accessions were classified into the following six groups based on leaf shape: accessions with round leaves,...
This paper discusses tendon friction effects regarding guiding and material selection. In order to extract valuable information for designers of tendon driven systems, several experiments are conducted to investigate e. g. the intrinsic friction or sliding effect. The results are used to build an experimental friction model and to derive a set of guidelines. The mechanical designer can use the proposed...
This paper resumes the frictionless fan concept which was introduced at itherm 2012 [1]. This concept was based on a flexible polymer blade, the vibration of which is, as opposite to the piezoelectric driven fan principle, driven by means of a magnetic field. This type of fan can be of interest in regions where otherwise the fluid flow would be stagnant.
Amputees at the Springfield YMCA and other YMCAs in the greater Springfield area want a prosthesis that would improve their swimming skills and mimic healthy body swimming mechanics. This way they can swim a lot better than they normally do with the prosthesis that they use for swimming now. Design Requirements include that the prosthesis should be able to do a breast stroke and the butterfly because...
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