Ji-Seon Jeong, Sook-Kyung Kim, Sang-Ryoul Park
We report a robust strategy for amino acid profiling method based on capillary electrophoresiselectrospray ionization-mass spectrometry (CE/ESI-MS) that offers a convenient platform for the direct analysis of underivatized amino acids from dried blood spot without any chemical derivatization. Sample preparation steps were simplified without derivatization. The analytical conditions with respect to pH and concentration of background electrolyte were optimized for 11 amino acids. The mean recoveries of amino acids for intra- and inter-day assays were found to be 96.9–102.1%. When compared with...
XX IMEKO World Congress
· TC13
· 2012
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Franco Marinozzi, Fabiano Bini, Simone Novelli
The interaction between ultrasonic waves and biological tissues is the cause of cavitation phenomena. A primary scope of this paper was to set-up a measurement system for the generation of cavitation by means of forcing a low frequency (20 kHz). From the spectra and power density was evident the presence of the random component associated to the noise of cavitation was evident. For the estimate of this component the technique ARMA spectral was particularly effective. The average lifetime of transient cavitation bubbles estimated from the time constant via the ARMA spectrum, was found to be...
XX IMEKO World Congress
· TC13
· 2012
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Hae Jin Park, Won Hyung Lee, Hyun Kyoon Lim, Se Jin Park
Background: Knowledge regarding normal upper airway anatomy is essential for airway management and is required to prevent malpositioning of endotracheal tubes. We evaluated the length of the upper airway in Korean children and adults who had no abnormality of the upper airway using a fiberoptic bronchoscope. Methods: Eighty seven patients aged 5 to 81 years undergoing noninvasive elective surgery were included in this study. After induction of anesthesia was complete, we measured the distance from the upper incisor to various components of the upper airway by fiberoptic bronchoscopy....
XX IMEKO World Congress
· TC13
· 2012
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M. Baszynski, Z. Moron, N. Tewel
One of the methods of medical navigation, applied for positioning of instruments inside the patient's body during investigation or surgery, is electromagnetic one. The great advantage of this method is a possibility of positioning inside the patient's body. Its shortcomings are: sensitivity to the presence of objects disturbing the magnetic field distribution, i.e. conducting and ferromagnetic objects in the operating space and a relatively small area of high accuracy measurement. The works presented in this paper are aimed to prevent or limit these disadvantages. The improved accuracy of...
XX IMEKO World Congress
· TC13
· 2012
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J. Haueisen, P. Fiedler, S. Griebel, L. Zentner, C. Fonseca, F. Vaz, F. Zanow
New areas of application for electroencephalography are in brain-computer interfaces, where disabled people might be able to interact with their environment based on measured brain signals. However, conventional electroencephalography is not suitable here. Thus, our aim is to develop novel dry electrodes for home use. We developed various novel EEG electrodes with titanium and polyurethane as base materials and nanometer sized coatings of titanium-nitride. We present results of the comparison of these electrodes with gold and silver/silver-chloride electrodes. In conclusion, our novel...
XX IMEKO World Congress
· TC13
· 2012
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B. Sagbas, M. N. Durakbasa
Frictional behaviors of articulating surfaces have been recognized as critical factors affecting their service life because these behaviors play very important role on wear of ultrahigh molecular weight polyethylene (UHMWPE) which causes failure of artificial joint replacements. The objective of this study is to determine temperature rise as a function of sliding time and maximum load for the articulating surfaces of vitamin E blended UHMWPE acetabular component paired with a cobaltchromium (CoCrMo) femoral component. Additionally frictional torque between the bearing surfaces was measured...
XX IMEKO World Congress
· TC13
· 2012
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Imran M. Khan, Mokhaled M. Mohammed, Sheroz Khan , Othman O. Khalifa
Inductive coupling has been the focus of attention over recent years for powering implantable devices. This paper focuses on developing a model for a novel coil design that takes the form of Figure-8 geometry. Two different mathematical models are developed and verified with simulation results in a Finite Element Method (FEM) computational electromagnetic simulator. Circuit parameters of the coil pair are extracted and the resonant primary and secondary tanks are designed.
XX IMEKO World Congress
· TC13
· 2012
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Linus Michaeli, Ján Šaliga, Ján Gálik
Measurement of signals from biological objects usually requires complex and expensive system. This paper presents a simple, cost effective, computer controlled modular systems consisting of self developed modules and modules from a few vendors and own software developed in LabVIEW. The system enables multichannel data acquisition with sampling frequency a few kHz with nearly unlimited lengths, triggering and pretriggering records. The records are stored in signal database and processed by software in PC using various advanced digital signal processing methods for recovering distorted signal....
XX IMEKO World Congress
· TC13
· 2012
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Eri Matsuyama, Du-Yih Tsai, Yongbum Lee, Haruyuki Watanabe, Masaki Tsurumaki, Katsuyuki Kojima
Improving image quality in digital mammographic images has clinical impact in order to increase accuracy of detection of breast cancer. This study aimed to develop and evaluate a new method for denoising mammographic images. The features of the proposed method include iterative use of undecimated multidirectional wavelet transforms at adjacent scales. In this method, computer-based simulations have been carried out for selecting wavelet basis function based on mutual information metric. Perceptual experiments on clinical mammograms were conducted. This new method was compared with the...
XX IMEKO World Congress
· TC13
· 2012
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R. Summers, T. Abdulla, J-M. Schleich
Executable biology at various levels of spatial scale is becoming increasingly important in order to understand the complexity exhibited in living systems. This paper describes how a multiscale systems approach can be used to integrate these models of behaviour to provide an insight into the development of cardiac valves. In particular, simulations of epithelial to mesenchymal transition using a Cellular Potts model are shown to demonstrate cell adhesion and imitate faithfully the in vivo process. As a consequence, this work also shows the importance of measurement of surface energy of...
XX IMEKO World Congress
· TC13
· 2012
· Download