Central Control and the Employment of Exchequer Grants in British Local Government

Abstract Not Provided

A student center for the Massachusetts Institute of Technology

Thesis (B.Arch) -- Massachusetts Institute of Technology, Dept. of Architecture, 1953.GRSN 438671Accompanying drawings held by MIT Museum.submitted by Hsio Wen Shih.B.Arc

Acoustic Droplet Vaporization: Strategies for Control of Bubble Generation and its Application in Minimally Invasive Surgery.

As a minimally invasive alternative to current cancer treatment, the use of encapsulated, superheated liquid perfluorocarbon droplets has been proposed to treat cancer by occlusion therapy. In response to an acoustic field, these droplets, which are small enough to pass through capillaries, vaporize into large gas bubbles that subsequently lodge in the vasculature. This research investigates strategies to reduce the pressures necessary to achieve acoustic droplet vaporization (ADV), what implications they may have on efficiency, and how the resulting location of bubbles may alter the acoustic field. Two methods to lower the ADV threshold were explored. The first investigated the role of pulse duration on ADV. The second investigated the role of inertial cavitation (IC) external to a droplet by adding ultrasound contrast agent (CA), which has a low IC threshold. At 1.44 MHz, the threshold was found to be 5.5-5.9 MPa peak rarefactional pressure (Pr) for short microsecond pulses and decreased for millisecond pulses to 3.8-4.6 MPa Pr. When CAs were added and long millisecond pulses were used, the ADV threshold decreased to values as low as 0.41 MPa Pr. With the help of CA, the same amount of power was necessary to achieve ADV through an attenuating tissue mimicking (TM) phantom as it was without attenuation and with only droplets. When comparing ADV pressure thresholds, where in situ pressures were used when a TM phantom was present, rarefactional pressure appeared to be the salient determinant. However, careful consideration must be taken when choosing pulse repetition frequencies and amplitude as inertial collapse of both ADV and IC bubbles appears to affect efficient droplet conversion. During in vivo application, treatment planning may be important as backscattering properties of microbubbles created by ADV can augment or obstruct the sound field in the affected area. With strategic targeting and subsequent conversion of droplets into microbubbles, constructive interference due to these effects reduces the transmitted pressures required for proximal ADV, and the attenuation from these bubbles can create a protective boundary for distal areas. The potential result can be a confined area for further ADV where lower pressures are required to cause vaporization.Ph.D.Biomedical EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/57723/2/ahlo_1.pd

A Study on User

This research explores how users are influenced to adopt the Mobile payment. The research employs the Technology Acceptance Model (TAM) to examine factors affecting the use

1,2-Bis(4-amino­phen­oxy)ethane

The mol­ecule of the title compound, C14H16N2O2, is located on a crystallographic twofold rotation axis. The central O—C—C—O bridge adopts a gauche conformation. One of the amine H atoms is disordered over two equally occupied positions. The crystal structure is stabilized by N—H⋯O and N—H⋯N hydrogen bonds

Evaluation of Pinot noir Maturity and Fruit Composition During the 1995 Vintage

During the 1995 harvest season Pinot noir development during ripening was monitored at Woodhall Vineyards (WHV) in Alpine and at three commercial vineyard sites at Croft (CR) Vineyards in Monmouth, Rex Hill Kings Ridge Vineyard (RHKR) in Newberg, and Erath Vineyards (ER) in Dundee. Cluster samples (25) were taken weekly during ripening and analyzed for cluster weights, berry weights, Brix, titratable acidity, malic acid, pH, potassium content, and skin anthocyanin and phenolic content