Browsing by Subject "Life sciences"

Now showing 1 - 5 of 5

Open Access
Beyond neonatal imitation: aerodigestive stereotypies, speech development, and social interaction in the extended perinatal period
(Cambridge University Press, 2017) Keven, N.
In our target article, we argued that the positive results of neonatal imitation are likely to be by-products of normal aerodigestive development. Our hypothesis elicited various responses on the role of social interaction in infancy, the methodological issues about imitation experiments and the relation between the aerodigestive theory and the development of speech. Here we respond to the commentaries.
Restricted
Değiniler : Yaşamadığını yazmak
(1978) Günel, Burhan
Open Access
Design of a switched robust control scheme for drug delivery in blood pressure regulation
(Elsevier B.V., 2016) Ahmed, S.; Özbay, Hitay
A control algorithm based on switching robust controllers is presented for a Linear Parameter Varying (LPV) time-delay system modeling automatic infusion of vasodilator drug to regulate postsurgical hypertension. The system is scheduled along a measurable signal trajectory. The prospective controllers are robustly designed at various operating points forming a finite set of robust controllers and then a hysteresis switching is performed between neighboring robust controllers for a larger operating range of the LPV system. The stability of the switching LPV system for the entire operating range is ensured by providing a sufficient condition in terms of bound on the scheduling signal variation using the concept of dwell time. Simulation results are provided to verify the performance of the designed control scheme. © 2016
Open Access
RF radiometery sensor sensitivity and detection profile
(IEEE, 2008-11) El-Sharkawy, A.-M.M.; Sotiriadis, P. P.; Bottomley, P. A.; Atalar, Ergin
Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared frequency ranges; this limits their depth of penetration since the human body is not "transparent" at these frequencies. To address this problem, we have previously designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a ∼100 KHz bandwidth. The radiometer has performed accurate temperature measurements to within ±0.1°C, over a tested physiological range of 28-40°C in saline phantoms whose electric properties match those of human tissue. In this work we analyze radiofrequency (RF) coil designs suitable for RF Radiometry. We investigate the coil profile sensitivity to look where temperature information is coming from and the depth of penetration associated with the receiver used. We also look into the virtues of using multi-turn coils versus single loop coils. We conclude that by using multi-turn coils the received noise signal is more sensitive to sample noise and temperature can be estimated more accurately especially with the use of smaller receivers. © 2008 IEEE.
Restricted
Yaşamadığını yazmak
(1978) Günel, Burhan