The rotordynamic forces generated by the fluid flow through the impeller leakage path of a centrifugal pump are now well established. The present paper examines the effects of modifying the leakage path geometry by changing the front shroud, from a conical shape to a more typical curved design, and the effects of low pressure seal design on these forces. It is found that only the cross-coupled ...

Abstract Obesity is a major public health issue with various comorbidities. Sleeve gastrectomy has become popular treatment for obesity, but it carries the risk of complications, particularly staple line leakage. This case study focused on 32-year-old woman grade II obesity and hiatal hernia who underwent laparoscopic sleeve gastrectomy. Four days after surgery, she presented abdominal pain, re...

INTRODUCTION Complications of oesophagectomy and gastric tube reconstruction include leakage and stenosis, which may be due to compromised microvascular blood flow (MBF) in gastric tissue. We recently demonstrated that decreased MBF could be improved perioperatively by topical administration of nitroglycerin. The aim of the present study was to investigate whether nitroglycerin, administered in...

To effectively protect the cross-power-domain interface circuits from electrostatic discharge (ESD) damages, a PMOS-based local ESD clamp was proposed in this work. The test circuits of prior and proposed designs have been implemented in silicon chip. The proposed design has the small chip area, low leakage current, and low peak transient voltage; therefore, it can help to reduce the overstress...

This paper introduces the high efficiency of a horizontal rolling piston type compressor for household refrigerators. In the rolling piston type compressor, excessive compression loss and leakage loss largely affects the efficiency of the compressor. An experimental analysis of the following three items was made to determine that the performance characteristics of the compressor could be improv...

A bidirectional transient voltage suppressor (TVS) Zener diode was fabricated with abrupt junctions using the low-temperature epitaxy process. The effects of various electrostatic discharge (ESD) stresses on the electrical properties are demonstrated, such as the current­voltage (I­V) and 1/f noise power spectral density (PSD). Very sharp and uniform bidirectional multi-junctions result in good...

Latent electrostatic discharge (LESD) damage sites are normally identified and analyzed after the damaged oxide has been transformed from a low to a high level leakage. Failure analysis typically focuses only on the primary rupture site, neglecting the remaining LESD damage sites. The purpose of this work is to present a new method of analysis which allows compromised oxides to be rapidly ident...

A 44-year-old female patient diagnosed as pulmonary lymphangioleiomyomatosis with respiratory failure underwent bilateral sequential lung transplantation using an entire left lung and a post-lower-lobectomy right lung due to pneumonia. Persistent air leakage during cough was noted and bronchoscopy 12 days after transplantation demonstrated post-lobectomy bronchial stump dehiscence with a large ...