J.A. Martin-Ramos

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Measurement of the flatness of cold rolled steel strip or aluminum foil is a vital aspect of production quality control. Cold lamination control based on the results of this measurement crucially affects production efficiency, but further processes can modify this flatness, and it can be even lost when strip becomes cold. We describe a low-cost flatness(More)
We can find many different types of commercial regulators in the market, these devices basically can be divided into two categories according to their operation mode: The first ones modulate the input voltage with PWM (pulse width modulation) to hold the constant voltage in the output necessary to charge the battery. The other ones operate in the MPP(More)
Schistosoma mansoni infection is frequent in certain areas of the world in which it is endemic. It is characterised by colonic and hepatic lesions. Gastrointestinal hemorrhages due to rupture of esophageal varices in case of hepatic involvement or moderate rectal bleeding due to colonic involvement may also be observed. We report a case of colonic(More)
One of the major drawbacks of high-ratio step-up transformers is the high value of their secondary side capacitor. This value is reflected at the primary side giving rise to a non-desirable one. There are some converters [1][2][3] which include this capacitor in the topology and can cope with it, and even more, they need it. Particularly, in high-voltage(More)
Measuring the flatness of a cold-rolled steel strip or aluminum foil is a vital aspect of production quality control. Cold lamination control based on the results of this measurement crucially affects production efficiency, but further processes can modify flatness, which can be lost when the strip becomes cold. We describe a low-cost flatness measurement(More)
Conventional spinal implants show an invariable behaviour that is not adapted to patients post-surgery evolution (e.g. scoliosis in children). They work as static and rigid structures that underpin the skeleton. A new visco-elastic spine implant is non-invasively controlled by means of a transcutaneous transformer, for progressive correction of spinal(More)
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