2,686 research outputs found
Governor's Dialogue on Health Care: Vision and Values
Summarizes discussions with over four hundred business, civic, nonprofit and healthcare community leaders about their vision for their healthcare system, the roles of employers, government, individuals, and the free market, and the values behind that vis
Explaining Small-Business Development: A Small-Business Development Model Combining the Maslow and the Hayes and Wheelwright Models
This paper looks at small-business management from the standpoint of Maslow’s hierarchy of needs and Hayes and Wheelwright’s four-stage model. The paper adapts Maslow’s hierarchy of needs model to small- business development and evolution. Additionally, Hayes and Wheelwright’s four-stage model is combined with the adapted Maslow small-business development model. The implications of the new model on the development of small businesses and future research are discussed
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Development of a medical imaging-based technology for cancer treatment
The Electrical Impedance Mammography (EIM) device is an imaging system
developed at the University of Sussex for the detection of breast lesions in vivo using
quadrature detection of impedance.
The work describes a novel technique to integrate Ultrasound-guided Focused
Ultrasound Surgery (USgFUS) with the existing EIM system. The benefits that such a
system could provide include the possibility of non-invasive detection, diagnosis and
treatment of breast cancer all within a single device and involving no radiation.
Furthermore the timescales involved would allow the process to be considered an
outpatient procedure such that a patient can be diagnosed and treated on the same day
using the same device.
Various geometries of transducer were investigated for physical compatibility as
well as the ability to target the entire specified volume, based on the dimensions of the
existing system. Simulations were performed using a custom written code based on
Huygen’s principle, allowing minimum surface area and power requirements to be
determined and feasibility of designs to be evaluated.
The use of phase differences in the excitation signals applied to individual
elements was also investigated, thus the effect of steering the simulated focus could be
observed, an important factor to consider when attempting to incorporate a transducer
into a device with restricted dimensions.
Resulting simulated pressure fields were used to obtain acoustic intensity fields,
which could then be used as inputs in the Pennes Bio-Heat Transfer Equation (BHTE)
allowing temperature distributions to be observed.
Preliminary studies proved the feasibility of using the suggested transducer design
in conjunction with the existing EIM system. Pressure fields and heating patterns were
all within acceptable limits, confirming the ability of the device to effectively ablate
cancerous tissue. Additionally the capability to steer the resultant focal point was
validated, and a thermal dose model was implemented allowing different heating patterns
to be quantitatively compared
The bureaucratization of war: moral challenges exemplified by the covert lethal drone
This article interrogates the bureaucratization of war, incarnate in the covert lethal drone.
Bureaucracies are criticized typically for their complexity, inefficiency, and inflexibility. This article
is concerned with their moral indifference. It explores killing, which is so highly administered,
so morally remote, and of such scale, that we acknowledge a covert lethal program. This is a
bureaucratized program of assassination in contravention of critical human rights. In this article, this
program is seen to compromise the advance of global justice. Moreover, the bureaucratization of
lethal force is seen to dissolve democratic ideals from within. The bureaucracy isolates the citizens
from lethal force applied in their name. People are killed, in the name of the State, but without
conspicuous justification, or judicial review, and without informed public debate. This article gives
an account of the risk associated with the bureaucratization of the State’s lethal power. Exemplified
by the covert drone, this is power with formidable reach. It is power as well, which requires great
moral sensitivity. Considering the drone program, this article identifies challenges, which will
become more prominent and pressing, as technology advances
Nerve complexes of circular arcs
We show that the nerve complex of n arcs in the circle is homotopy equivalent
to either a point, an odd-dimensional sphere, or a wedge sum of spheres of the
same even dimension. Moreover this homotopy type can be computed in time O(n
log n). For the particular case of the nerve complex of evenly-spaced arcs of
the same length, we determine the dihedral group action on homology, and we
relate the complex to a cyclic polytope with n vertices. We give three
applications of our knowledge of the homotopy types of nerve complexes of
circular arcs. First, we use the connection to cyclic polytopes to give a novel
topological proof of a known upper bound on the distance between successive
roots of a homogeneous trigonometric polynomial. Second, we show that the
Lovasz bound on the chromatic number of a circular complete graph is either
sharp or off by one. Third, we show that the Vietoris--Rips simplicial complex
of n points in the circle is homotopy equivalent to either a point, an
odd-dimensional sphere, or a wedge sum of spheres of the same even dimension,
and furthermore this homotopy type can be computed in time O(n log n)
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