8 documents found, page 1 of 1

Clustering-Based Classification of Polygonal Wheels in a Railway Freight Vehicl...

Polygonal wheels are one of the most common defects in train wheels, causing a reduction in comfort levels for passengers and a higher degradation of vehicle and track components. With the aim of contributing to the safety and reliability of railway transport, this paper presents the development of an innovative methodology for classifying polygonal wheels based on a wayside system. To achieve that, a numerical...

Early identification of out-of-roundness damage wheels in railway freight vehic...

Early identification of wheel defects can prevent serious damage to railways, considerably lowering maintenance costs for both railway administrations and rolling stock operators. Within this context, an unsupervised methodology based on artificial intelligence techniques is presented, which allows the detection and classification of out-of-roundness damage wheels, such as wheel flats and polygonal wheels, base...

A strategy for out-of-roundness damage wheels identification in railway vehicle...

Wayside monitoring is a promising cost-effective alternative to predict damage in the rolling stock. The main goal of this work is to present an unsupervised methodology to identify out-of-roundness (OOR) damage wheels, such as wheel flats and polygonal wheels. This automatic damage identification algorithm is based on the vertical acceleration evaluated on the rails using a virtual wayside monitoring system an...

Browning of white adipocytes: melanocortins as essential players

Physiological, biochemical and functional changes induced by a simulated 30 min...

Aim. Up to now, few studies regarding the impact of motocross heats on functional and physiological variables have been addressed so far. The aim of the present study was to analyze physiological and functional changes induced by a simulated off-road motocross heat. Methods. Fifteen motocross riders (28.3 +/- 7.9 yrs; 71.1 +/- 7.0 kg; 1.69.0 +/- 4.0 cm; 53.5 +/- 3.7 mL.kg(-1).min(-1); 14.9 +/- 3.3% fat) perform...

Strenuous exercise aggravates MDMA-induced skeletal muscle damage in mice

The aim of this study was to investigate the influence of ecstasy (MDMA) administration on body temperature and soleus muscle histology in exercised and non-exercised mice. Charles-River mice were distributed into four groups: Control (C), exercise (EX), MDMA treated (M), and M + EX. The treated animals received an i.p. injection (10 mg/kg) of MDMA (saline for C and EX), and the exercise consisted of a 90 min l...

Moderate endurance training prevents doxorubicin-induced in vivo mitochondriopa...

The objective of this work was to test the hypothesis that endurance training may be protective against in vivo doxorubicin (DOX)-induced cardiomyopathy through mitochondria-mediated mechanisms. Forty adult (6-8 wk old) male Wistar rats were randomly divided into four groups (n=10/group): nontrained, nontrained + DOX treatment (20 mg/kg), trained (14 wk of endurance treadmill running, 60-90 min/day), and traine...

Effect of a high-altitude expedition to a Himalayan peak (Pumori, 7,161 m) on p...

The effects of a high-altitude exposure were studied in six mountaineers who spent 3 weeks at an altitude range between 5,250 and 7,161 m after I week in an acclimatization trek (2,800-5,250 m). Blood drawn from the antecubital vein was collected at sea level I day before and I day after the expedition to analyse some haematological variables [haemoglobin (Hb), haematocrit (Htc) and red blood cell (RBC) count],...