Research on the Force-Sensitive Characteristic of InAs QD Embedded in HEMT.

A force-sensitive structure of an InAs Quantum Dot (QD) embedded in a high electron mobility transistor (HEMT) is presented in this paper. The size of an InAs QD is about 30 nm prepared by the S-K growth mode, and the force-sensitive structure is fabricated by molecular beam epitaxy (MBE). The force-sensitivity characteristic of the QD HEMT is studied by the electrical and mechanical properties.

Design of a TDOA location engine and development of a location system based on chirp spread spectrum.

Location based services (LBS) provided by wireless sensor networks have garnered a great deal of attention from researchers and developers in recent years. Chirp spread spectrum (CSS) signaling formatting with time difference of arrival (TDOA) ranging technology is an effective LBS technique in regards to positioning accuracy, cost, and power consumption. The design and implementation of the location engine and location management based on TDOA location algorithms were the focus of this study; as the core of the system, the location engine was designed as a series of location algorithms and smoothing algorithms.

Evaluation of gastric fundic and oesophageal varices by 64-row multidetector computed tomography before and after transjugular intrahepatic portosystemic shunt with concurrent left gastric vein embolization.

Objective: To determine the utility of 64-row multidetector computed tomography (MDCT) in assessing the changes of gastric fundic and oesophageal varices before and after transjugular intrahepatic portosystemic shunt (TIPS) with concurrent left gastric vein embolization.

Methods: Twenty-eight consecutive patients with gastric fundic and oesophageal varices resulted from posthepatitic cirrhosis, clinically confirmed with endoscopy, were enrolled into our study. All the patients underwent thoracicoabdominal triphasic enhancement scans with 64-row MDCT 2 weeks before TIPS along with embolizing left gastric vein, and 6 months after the therapy.

[Clinical value of 64-slice CT angiography in detecting coronary artery anomalies].

Objective: To determine the clinical value of 64-slice computed tomography angiography (CTA) in the diagnosis of coronary artery anomalies.

Methods: The coronary artery imaging data of 852 patients who underwent 64-slice CTA from July 2006 to May 2007 were retrieved. The imaging features of coronary artery anomalies confirmed by selective coronary angiography were reviewed.

Evaluation of entire gastric fundic and esophageal varices secondary to posthepatitic cirrhosis: portal venography using 64-row MDCT.

Background: There are no reports regarding entire gastric fundic and esophageal varices evaluated with 64-row multidetector CT (MDCT). We attempt to clarify the feasibility of portal venography with this scanner in evaluation of these varices.

Methods: A total of 33 patients, with clinically confirmed gastric fundic and esophageal varices secondary to posthepatitic cirrhosis, underwent thoracicoabdominal triphasic enhancement scans using 64-row MDCT along with conventional angiographic portography.