iron oxide-chitosan nanobiocomposite for urea sensor

... utilized for estimation of urea in serum samples and to develop other biosensors. Besides this, efforts should be made to utilize these materials for in vivo sens- ing. A. Kaushik et al. / Sensors ... films for application to urea biosensor, Biosens. Bioelectron. 17 (2002) 697–703. [3] Rajesh, V. Bisht, W. Takashima, K. Kaneto, An amperometric urea biosensor based on covalent immob...

Ngày tải lên: 20/03/2014, 13:04

... perfor- mance gain over B-MAC. C-MAC outperforms B-MAC even when there is only one link. C-MAC performs one traffic snoop- ing and RTS/CTS exchange for a block of packets while a CCA is needed for ... B u,v are two time-varying constants dependent on environment. (a) Office (b) Corridor (c) Grass field (d) Parking lot Fig. 2. Four environments used for measurements. To evaluate the accurac...

Ngày tải lên: 01/09/2013, 15:23

... demanding deployment environments of wireless sensor networks make security for these systems more challenging than for conventional networks. However, several properties of sensor networks may ... proposed security mechanisms for wireless sensor networks. Keywords: Wireless Sensor Networks (WSNs), Security, Threats, Attacks, I. INTRODUCTION Wireless sensor network (...

Ngày tải lên: 05/03/2014, 23:20

... 2008 Keywords: Nano-channel Urea Biosensor Lithography abstract Silicon nano-channels have been surface functionalized with the enzymeurease for biosensor applications to detect and quantify urea concentration. ... (ENFET), which is a pH-based ISFET has been developed [8,9]. Glucose sensors, and urea sensors are among the best-known biosensors for widespread clinical applications. T...

Ngày tải lên: 16/03/2014, 15:25

... (TiO 2 )-based gas sensors show good sensitivity and stability in adverse environments and have the potential to become the material of choice for high tem- perature gas sensors [2,3].TiO 2 forms three ... 600–900 ◦ C [19]. Since ionic radii for Al and Ti are close to each other (0.074 nm for Ti 4+ and 0.0675 nm for Al 3+ ) [20], Al can occupy a regular cation position, forming a subs...

Ngày tải lên: 19/03/2014, 16:47

... to form printable ink. The ink was deposited on sensor microheater platform, dried for 15 min at 150 ◦ C and annealed at 700 ◦ C for 15 min to reach the stabilization of the material. The sensor ... could be an evidence for high oxidation ability of material at elevated temperatures. 3.2. Sensor characterization Long-term stability measurements were performed for 590 h. All sens...

Ngày tải lên: 19/03/2014, 16:47

... Sensors and Actuators B 109 (2005) 128–134 New technology of metal oxide thin film preparation for chemical sensor application Viacheslav Khatko a,∗ , ... new way to preparegas sensors has appeared. This way is connected with the attempt to find methods that increasethe surfacearea ofactivelayersfor chemicalsensing. Since the sensor sensitivity is ... dramaticinfluenceon sensorperformance....

Ngày tải lên: 20/03/2014, 13:05

... best performance because each sensor knows exactly what area it should consider for coverage. If any part of the sensor s Voronoi region is farther away than R s , the sensor knows that no other sensor ... histogram, although the sensors don’t represent the histogram explicitly. Instead, each sensor keeps two sets of CDFs, one set for each axis. That is, for each row or column...

Ngày tải lên: 30/03/2014, 16:20

... are distributed in the environment uniformly random. We use three types of sensors(SensorType1, SensorType2 and SensorType3) with equal quantities. In each experiment a sensor field is generatedwith ... algorithm for highly uniform cluster formation,” in European Workshop on Wireless SensorNetworks (EWSN 2004), Jan. 2004. [30] S. Soro and W. B. Heinzelman, “Cluster head election techn...

Ngày tải lên: 30/03/2014, 16:20

... Structure for the Soft Sensor 117 6.4 The One-step-ahead Predictor Soft Sensor 127 6.4.1 Refinement of the One-step-ahead Soft Sensor 134 6.5 Conclusions 142 7 Strategies to Improve Soft Sensor ... soft sensor design phase), which can be detected by critically analyzing system inputs. This analysis should be constantly performed by checking for violation of suitable thr...

Ngày tải lên: 17/10/2013, 12:15