Exaggerated blood pressure response during the exercise treadmill test as a risk factor for hypertension

Exaggerated blood pressure response (EBPR) during the exercise treadmill test (ETT) has been considered to be a risk factor for hypertension. The relationship of polymorphisms of the renin-angiotensin system gene with hypertension has not been established. Our objective was to evaluate whether EBPR during exercise is a clinical marker for hypertension. The study concerned a historical cohort of normotensive individuals. The exposed individuals were those who presented EBPR. At the end of the observation period (41.7 months = 3.5 years), the development of hypertension was analyzed within the two groups. Genetic polymorphisms and blood pressure behavior were assessed as independent variables, together with the classical risk factors for hypertension. The I/D gene polymorphism of the angiotensin-converting enzyme and M235T of angiotensinogen were ruled out as risk factors for hypertension. EBPR during ETT is not an independent influence on the chances of developing hypertension. No differences were observed between the hypertensive and normotensive individuals regarding gender (P = 0.655), skin color (P = 0.636), family history of hypertension (P = 0.225), diabetes mellitus (P = 0.285), or hypertriglyceridemia (P = 0.734). The risk of developing hypertension increased with increasing body mass index (BMI) and advancing age. The risk factors, which independently influenced the development of hypertension, were age and BMI. EBPR did not constitute an independent risk factor for hypertension and is probably a preclinical phase in the spectrum of normotension and hypertension

The remote surveillance device in monitoring and diagnosis of induction motor by using a PDA

International audienceThe main goal of this paper is to propose a novel approach about remote diagnostic of induction motor by using a Personal Digital Assistant (PDA). For the updating information, a framework acquisition system has to be used. It includes both acquisition and data processing systems. Thus, information on the PDA can be updated thanks to a wireless via Bluetooth Local Area Network (LAN) access point. Consequently, this approach will exert some leverage to put a lot of care on monitoring and diagnosis on induction machines

Independent Voltage Control for Series Connected Six-Phase and Three-Phase Induction Machines

International audienceA lot of relevant concepts related to series connection and independent control of multiphase machines supplied from a single current-controlled voltage source inverter have been recently demonstrated by some researchers. These previous evaluation give a great contribution to further improvements of multimachine series connected applications. Following the initial proposition, which includes an evaluation based on the general theory of electrical machines, this paper evaluates PWM schemes for two-motor series connected motor drive. The goal of this paper is to show how to achieve independent voltage control and to evaluate the switched voltage profile in the motors windings. Scalar and vector approach are addressed and, simulation and experimental results are shown to illustrate details discussed in the paper