Enhancing the effective expansion ratio to further improve fuel consumption, this study implemented a kind of Variable Port Timing (VPT) by designing vertically moving sleeve on outside scavenging port low-speed two-stroke diesel engine with 340 mm bore. A 3D Computational Fluid Dynamics (CFD) model was constructed and calibrated investigate influence VPT strategy performance internal gas excha...

A simple algorithm is presented for evaluating scattering parameters of a two-port network. This technique uses the indefinite admittance matrix to calculate scattering or any other desired set of two-port parameters.

INTRODUCTION Single-port laparoscopic surgery has some technical limitations with respect to control of the forceps inserted through the single-access site, which results in increased internal collisions due to coaxial alignment of the instruments, as well as and decreased range of motion and visualization. To overcome these limitations, we employ a "modified marionette technique" as a way to c...

Port organizations have focused their efforts on physical or tangible assets, generating profitability and value. However, it is recognized that the greatest sustainable competitive advantage is the creation of knowledge using the intangible assets of the organization. The Balanced ScoreCard, as a performance tool, has incorporated intangible assets such as intellectual, structural and social c...

A previously developed reciprocating air microcompressor having a 1-mm(0.04 in)-diameter piston, an inlet port that did not have a moving valve, and an outlet port equipped with a miniature reed valve, was capable of a maximum discharge pressure of 80 kPa (gage, 11.6 psig) at a piston frequency of 100 Hz. We have improved on this compressor performance, and have attained a maximum discharge pre...

Superconducting circuit testing and materials loss characterization requires robust reliable methods for the extraction of internal coupling quality factors microwave resonators. A common method, imposed by limitations on device design or experimental configuration, is single-port reflection geometry, i.e. reflection-mode. However, impedance mismatches in cryogenic systems must be accounted thr...

The patient was placed under general anesthesia and put into the supine position with the right arm in a hanger above her head. A right-sided video-assisted thoracoscopic (VATS) thymectomy was performed using three 5-mm ports with incisions lateral to the breast after installation of marcain at the port sites. Insufflation of CO2 was installed at a pressure of up to 10 mmHg. A 5-mm high-definit...

BACKGROUND Because of long-term use for chemotherapy and fluid administration in cancer patients, a totally implantable venous access port (TIVAP) has been advised as a feasible catheter. The purpose of this study was to evaluate the effectiveness and safety of ultrasound (US)-guided internal jugular vein (IJV) puncture for TIVAP implantation in patients with breast cancer. METHODS We reviewe...