Search Results

You are looking at 1 - 10 of 56 items for :

Clear All
Open access

ERFBM Azevedo, KC Alonso and A Cliquet

34 63.4 1.74 20.95 Tetraplegic active SD 8.31 9.61 0.03 2.89 CI 23.69- 51.47- 1.7-1.78 17.35- 44.31 75.33 24.54 Mean 37.25 76.98 1.78 24.11 Tetraplegic inactive SD 9.94 10.46 0.05 2.82 CI 30.94- 70.33- 1.75- 22.32- 43.56 83.62 1.82 25.89 Abbreviations: SD, standard deviation; CI, confidence intervals; BMI, body mass index In Figure 1 , the difference between groups in fat percentage and BMI can be observed. For able-bodied persons, fat

Open access

Farhad Abtahi, Fernando Seoane and Kaj Lindecrantz

through analogue filtering. Figure 2 Apparent frequencies of a signal with a 0.3 Hz actual frequency component, sampled at 0.2, 0.3, 0.4 and 0.5 Hz are depicted. It is clear that due to aliasing the apparent frequency differs from the actual frequency in all cases. Irrespective of choice of estimation method for the impedance spectra, be it frequency sweep, multi-sine or other, longer estimation times yield better estimates; the more periods of the stimulation and sensing voltage/current, the higher signal-to-noise ratio (SNR). For slowly varying signals, e.g

Open access

Haval Y. Yacoob Aldosky and Suzan M. H. Shamdeen

all frequencies of distilled water. Distilled Water f / kHz Admittance (μS) 2-Outer Electrodes Admittance (μS) 2-Inner Electrodes Admittance (μS) 4-Electrodes 0.05 1.49 2.91 13.09 2 1.65 3.77 20.10 6 2.55 5.06 24.96 20 6.62 10.38 24.03 60 15.78 20.25 34.16 100 20.05 23.81 44.28 The configuration of the electrodes also contributes to the increase in the measured admittance. For the four electrode setup there is no current flow through the voltage measurement electrodes, thus there

Open access

Tushar Kanti Bera, Samir Kumar Biswas, K. Rajan and J. Nagaraju

. Castro G. M. Gaona G. A. Aguillon M.A. Rosell F. P. J. Carrera B. J Electrical Impedance Tomography: An Electronic Design, with Adaptive Voltage Measurements and A Phantom Circuit for Research in The Epilepsy Field Proceedings - 19th Internl Conf. - IEEE/EMBS Oct. 30 - Nov. 2 1997 867 868 USA 19 Henderson R. P., Webster J. G. An impedance camera for spatially specific measurements of the thorax. IEEE Transactions on Biomedical Engineering. 1978;Bme-25(3):250-254. 10.1109/TBME.1978.326329 Henderson R. P. Webster J. G An

Open access

Carles Aliau-Bonet and Ramon Pallas-Areny

analyzer and calculated body capacitance to ground C g for the four subjects and two feet heights above to ground: 10 cm (u) and direct outsole contact (d). Subject C HLu (pF) C gu (pF) C HLd (pF) C gd (pF) 1 22.5 95.4 18.2 153.0 2 23.5 85.1 17.8 159.7 3 24.8 72.9 20.5 119.2 4 25.5 66.8 20.2 123.2 Table 3 Capacitance C HL measured with the MT4080 LCR meter and calculated body capacitance to ground C g for the four subjects and two feet heights above ground: 10 cm (u) and direct outsole

Open access

Nermin Öztürk, Esin Ozturk-Isik and Yekta Ülgen

/m 2 ) Normal 21 30.76 ± 5.51 [19.82, 43.57] NS NS Osteopenia 22 29.97 ± 6.02 [16.41, 43.42] - NS Osteoporosis 5 25.25 ± 1.33 [24.03, 27.33] - - Dominant arm Characteristic Frequency (kHz) Normal 21 51.72 ± 8.57 [39.92, 69.57] NS P < 0.005 Osteopenia 22 55.91 ± 10.01 [39.96, 75,68] - NS Osteoporosis 5 65.42 ± 12.96 [57.98, 88.30] - - Total Lumbar Spine BMD (g∙cm -2 ) Normal 21 1.048 ± 0.08 [0.934, 1.259] P < 0.001 P < 0.001 Osteopenia 22 0.855 ± 0.05 [0.784, 0

Open access

Natália T. Bellafronte, Marina R. Batistuti, Nathália Z. dos Santos, Héric Holland, Elen A. Romão and Paula G. Chiarello

±8.3 (-36±17) -18 to -12 (-43 to -30) -31 1.3 FM (kg) 31±12 19±12 0.14* 0.44** 11±7.7 (95±257) 7.7 to 13 (1.0 to 191) -4.5 26 HD subgroup (n=93) Bland-Altman 95% limits of agreement Data BIS SFBIA ICC r Bias a (%) b 95%CI Bias c (%) d Lower Upper analysed R (ohm) 730±128 606±103 -0.03 -0.05 124±168 (18±25) 90 to 159 (13 to 23) -206 454 Xc (ohm) 78±22 68±17 0.18* 0.16 10±25 (13±38) 5.2 to 16 (5.3 to 21) -40 60

Open access

C. Canali, K. Aristovich, L. Ceccarelli, L.B Larsen, Ø. G. Martinsen, A. Wolff, M. Dufva, J. Emnéus and A. Heiskanen

16 A. P. Bagshaw, A. D. Liston, R. H. Bayford, A. Tizzard, A. P. Gibson, a. T. Tidswell, M. K. Sparkes, H. Dehghani, C. D. Binnie and D. S. Holder, Neuroimage, 2003, 20, 752–764. https://doi.org/10.1016/S1053-8119(03)00301-X Bagshaw A. P. Liston A. D. Bayford R. H. Tizzard A. Gibson A. P. a. T Tidswell Sparkes M. K. Dehghani H. Binnie C. D. Holder D. S. Neuroimage 2003 20 752 764 org/10.1016/S1053-8119(03)00301-X 17 B. Amm, T. Kao, X. Wang, G. Boverman, J. Sabatini, J. Ashe, J. Newell, S. Member, D. Isaacson and

Open access

Mirele S. Mialich, Bruna R. Silva and Alceu A. Jordao

between the cutoff points of the BMI (kg/m 2 ) and body fat ranges (%) according to Gallagher et al (2000). Fat mass (%) BMI (kg/ 2 ) Total < 18.5 18.5 – 24.9 25 – 29.9 ≥ 30.0 Men (%) < 8 3.1 (12) 4.6 (18) 0.5 (2) 0 (0) 8.3 (32) 8–20 3.9 (15) 29.3 (113) 11.6 (45) 1.8 (7) 46.6 (180) 20 – 25 0.5 (2) 6.7 (26) 10.1 (39) 2.8 (11) 20.2 (78) > 25 0.3 (1) 4.4 (17) 10.4 (40) 9.8 (38) 24.8 (96) Total 7.8 (30) 45.0 (174) 32.6 (126) 14.5 (56

Open access

Gabriel A. Ruiz, Martín L. Zamora and Carmelo J. Felice

of electrode capacitance and medium resistance. Biosens. Bioelectron. 2003; 19: 495-502. http://dx.doi.org/10.1016/S0956-5663(03)00229-X Liju Y Chuanmin R Yanbin L Detection of viable Salmonella typhimurium by impedance measurement of electrode capacitance and medium resistance Biosens. Bioelectron 2003 19 495 – 502 http://dx.doi.org/10.1016/S0956-5663(03)00229-X 24 Manli G, Jinhua Ch, Xubin Y, Kun Ch, Lihua N, Shouzhuo Y. Monitoring of cell growth and assessment of cytotoxicity using electrochemical impedance spectroscopy. Biochim