Power systems for undersea observatories combine ideas from terrestrial power systems and switching power supplies with experience from undersea cable systems. Basic system tradeoffs for various design decisions are explored in this paper. First, design questions including whether the power delivery should be alternating or direct current and a parallel or series network are examined. This intr...

modeling and wrench feasible workspace analysis of a spatial cable suspended robots is presented. a six-cable spatial cable robot is used the same as stewart robots. due to slow motion of the robot we suppose the motion as pseudostatic and kinetostatic modeling is performed. various workspaces are defined and the results of simulation are presented on the basis of various workspaces and applied...

It is proposed that power systems for undersea observatories combine ideas from terrestrial power systems and switching power supplies with experience from undersea cable systems. Basic system trade-offs for various design decisions are explored in this paper. First, design questions such as whether the power delivery should be by means of alternating or direct current, and a parallel or series...

The main purpose of this technical paper is to analyze the various designs available for a Submarine Electro Hydraulic Umbilical, composed of power conductors, signal/control cables, steel tubes, thermoplastic hoses and/or optical cables, in order to reduce the options to the final project definition, considering the magnetic and thermal limitations of the components. The circulating current at...

Intracellular recordings of cortical neurons in vivo display intense subthreshold membrane potential (V(m)) activity. The power spectral density of the V(m) displays a power-law structure at high frequencies (>50 Hz) with a slope of approximately -2.5. This type of frequency scaling cannot be accounted for by traditional models, as either single-compartment models or models based on reconstruct...

Abstract Water leakage of the insulation sheath can lead to a decrease in performance power cable, which poses hidden danger cable. Accurate detection and positioning water area are crucial for improving safety stability. In response defect cable sheath, this article proposes method based on reflective terahertz time-of-flight tomography technology measure sheath. A sample was prepared by simul...

There is an increasing need to determine accurately the strength properties of tendons for an effective ground control on mines and underground structures as well as on modelling simulations. The strength properties of cables, used as cable bolts, have been evaluated mainly by their ultimate tensile strength, as this kind of test can be carried out in the field as well as in the laboratory. Onl...

In the following paper, a new innovative design in which simple and effective components are utilized in a circuit that enhances the capabilities of the portable power banks available in the market is discussed. Components such as DC voltage regulators and USB cable have been used to create a circuit that has more utility compared to products available in the market. It offers additional advant...

Condition monitoring of partial discharge (PD) has become a preferred method in the design of HV apparatus. Power cable is one of the HV apparatus affected by PD activity. Although, the phenomenon of PD in power cables are well known, the effect of soil thermodynamics on PD is not yet well established. Thus, an experiment has been carried out to assess the effect of soil thermal resistivity on ...