Volumetric High Intensity Focused Ultrasound (HIFU) ablation has several advantages as compared to the traditional point-by-point ablation, such as improved energy efficiency and homogeneous thermal lesions with sharp borders [1]. However, there is an increased risk of excessive off-focus heating, especially in the near-field [2], and the thermal lesions can also vary in shape and size due to l...

This article makes the argument that compression ignition combustion processes that are “flameless” with volumetric energy release, described as Low Temperature Combustion (LTC), are a thermodynamic pathway to maximizing the efficiency of reciprocating piston, internal combustion engines. The argument is built from the foundation of determining the maximum theoretical efficiency for an IC Engin...

Enhancement of Volumetric Specific Impulse in HTPB/Ammonium Nitrate Mixed Hybrid Rocket Systems by Jacob W. Forsyth, Master of Science Utah State University, 2016 Major Professor: Dr. Stephen A. Whitmore Department: Mechanical and Aerospace Engineering Hybrid rocket systems are safer and have higher specific impulse than solid rockets. However, due to large oxidizer tanks and low regression rat...

Experiments were carried out to evaluate the performance of a medium grade LHR diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions of jatropha oil in crude from and biodiesel form with varied injection timing and injection pressure. Performance paramete...

Background/Aim: Papillary neoplasia encompasses both malignant and benign lesions, core needle biopsy (CNB) is crucial in their diagnosis. Histological findings determine management. Here we compare volumetric apparent diffusion coefficient (ADC) histogram analysis of carcinomas pathologies identified by histopathology from excisional biopsies. Methods: This retrospective study included 524 pat...

A novel approach for 3D Shape description, applicable for search and retrieval applications, based on the theory of Ellipsoidal Harmonics is presented in this paper. The Ellipsoidal Harmonics are appropriately adopted in order to describe volumetric represented 3D objects. The experimental results, performed in a complete 3D object database, prove the efficiency of the proposed approach.