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Qingshan Feng, Rui Li, Baohua Nie, Shucong Liu, Lianyu Zhao, Hong Zhang
Girth weld cracking is one of the main failure modes in oil and gas pipelines; girth weld cracking inspection has great economic and social significance for the intrinsic safety of pipelines. This paper introduces the typical girth weld defects of oil and gas pipelines and the common nondestructive testing methods, and systematically generalizes the progress in the studies on technical principles, signal analysis, defect sizing method and inspection reliability, etc., of magnetic flux leakage (MFL) inspection, liquid ultrasonic inspection, electromagnetic acoustic transducer (EMAT) inspection and remote field eddy current (RFDC) inspection for oil and gas pipeline girth weld defects...
December 28, 2016: Sensors
Mark W Stevenson, Joseph M Warpeha, Cal C Dietz, Russell M Giveans, Arthur G Erdman
The use of elastic bands in resistance training has been reported to be effective in increasing performance-related parameters such as power, rate of force development (RFD), and velocity. The purpose of this study was to assess the following measures during the free-weight back squat exercise with and without elastic bands: peak and mean velocity in the eccentric and concentric phases (PV-E, PV-C, MV-E, MV-C), peak force (PF), peak power in the concentric phase, and RFD immediately before and after the zero-velocity point and in the concentric phase (RFDC)...
November 2010: Journal of Strength and Conditioning Research
Mahamadou E Gounga, Shi-ying Xu, Zhang Wang
In recent years, China has become an increasingly important and the largest chestnut producer in the world. This study aimed to evaluate the nutritional value and microbiological quality of the roasted freeze-dried Chinese chestnut (Castanea mollissima) (RFDC) coated with dark chocolate (DCC) and milk chocolate (MCC) for industrial use and commercial consumption. Chocolate coating significantly improved the nutritional value of chestnut. RFDC had high levels of starch (66.23%) and fibers (3.85%) while DCC and MCC contained significantly high amounts of sucrose, protein, fat and minerals...
September 2008: Journal of Zhejiang University. Science. B
Mahdi S AbuMadini, Sheikh I A Rahim, Mohamed A Al-Zahrani, Abbdalla O Al-Johi
BACKGROUND: Treatment provision and treatment seeking for substance use disorders is a relatively new phenomenon in the Middle East. The present study aims to study these trends among first admissions to the specialized addiction treatment Amal Hospital of Dammam over its first two decades (1986-2006). The main outcome measures were: annual inception number (AIN), relative frequency of substances (RFS), relative frequency of drug combinations (RFDC), mean number of substances (MNS), and sociodemographic changes...
October 1, 2008: Drug and Alcohol Dependence
M E Gounga, S-Y Xu, Z Wang, W G Yang
Harvested chestnut is characterized by a short shelf life, exposing many Chinese producers to a storage problem as product losses are very high. The objective of this study was to develop a suitable technology to extend the shelf life of harvested chestnut fruits for commercial use. The effect of whey protein isolate-pullulan (WPI-Pul) coating on fresh-roasted chestnuts (FRC) and roasted freeze-dried chestnut (RFDC) quality and shelf life was studied under 2 different storage temperature (4 and 20 degrees C) conditions...
May 2008: Journal of Food Science
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