4,977 research outputs found
SUSY Moose Runs and Hops: An extra dimension from a broken deformed CFT
We find a class of four dimensional deformed conformal field theories which
appear extra dimensional when their gauge symmetries are spontaneously broken.
The theories are supersymmetric moose models which flow to interacting
conformal fixed points at low energies, deformed by superpotentials. Using
a-maximization we give strong nonperturbative evidence that the hopping terms
in the resulting latticized action are relevant deformations of the fixed point
theories. These theories have an intricate structure of RG flows between
conformal fixed points. Our results suggest that at the stable fixed points
each of the bulk gauge couplings and superpotential hopping terms is turned on,
in favor of the extra dimensional interpretation of the theory. However, we
argue that the higher dimensional gauge coupling is generically small compared
to the size of the extra dimension. In the presence of a brane the topology of
the extra dimension is determined dynamically and depends on the numbers of
colors and bulk and brane flavors, which suggests phenomenological
applications. The RG flows between fixed points in these theories provide a
class of tests of Cardy's conjectured a-theorem.Comment: 34 pages, 12 EPS figures, one reference adde
Anaplastic Thyroid Carcinoma Histologically Mimicking a Plasmacytoma.
Anaplastic (undifferentiated) thyroid carcinoma (ATC) is a rare malignancy which may arise from transformation of a pre-existing differentiated carcinoma. We report the unique case where a lesion of thyroid origin presented with the histological features of mature plasma cells. Immunohistochemistry confirmed the lesion to be an anaplastic thyroid carcinoma arising from papillary thyroid carcinoma. A tumor mimicking a malignancy of a different cellular origin can lead clinicians to incorrect treatment approaches. Careful correlation with clinical details and knowledge of these unique presentations is important for reaching the correct diagnosis
Wisent: Robust Downstream Communication and Storage for Computational RFIDs
Computational RFID (CRFID) devices are emerging platforms that can enable
perennial computation and sensing by eliminating the need for batteries.
Although much research has been devoted to improving upstream (CRFID to RFID
reader) communication rates, the opposite direction has so far been neglected,
presumably due to the difficulty of guaranteeing fast and error-free transfer
amidst frequent power interruptions of CRFID. With growing interest in the
market where CRFIDs are forever-embedded in many structures, it is necessary
for this void to be filled. Therefore, we propose Wisent-a robust downstream
communication protocol for CRFIDs that operates on top of the legacy UHF RFID
communication protocol: EPC C1G2. The novelty of Wisent is its ability to
adaptively change the frame length sent by the reader, based on the length
throttling mechanism, to minimize the transfer times at varying channel
conditions. We present an implementation of Wisent for the WISP 5 and an
off-the-shelf RFID reader. Our experiments show that Wisent allows transfer up
to 16 times faster than a baseline, non-adaptive shortest frame case, i.e.
single word length, at sub-meter distance. As a case study, we show how Wisent
enables wireless CRFID reprogramming, demonstrating the world's first
wirelessly reprogrammable (software defined) CRFID.Comment: Accepted for Publication to IEEE INFOCOM 201
Microfluidic Detection of Biogenic Amines
For our study of Microfluidic Detection of Biogenic Amines, we have designed a microfluidic device to separate and detect different biogenic amine concentrations using amperometric detection. The goal of this project is to identify and quantify biogenic amines form the neural fluid extracted from the pericardial cavity of the Jonah crabs (Cancer Borealis). The device that we designed utilizes polydimethylsiloxane (commonly known as PDMS) along with a carbon paste electrode and a palladium decoupler. Using capillary electrophoresis (CE) along with amperometric detection, we aim to separate biogenic amines and detect them with amperometric detection
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Preoperative Narcotic Use, Impaired Ambulation Status, and Increased Intraoperative Blood Loss Are Independent Risk Factors for Complications Following Posterior Cervical Laminectomy and Fusion Surgery.
ObjectiveThis retrospective cohort study seeks to identify risk factors associated with complications following posterior cervical laminectomy and fusion (PCLF) surgery.MethodsAdults undergoing PCLF from 2012 through 2018 at a single center were identified. Demographic and radiographic data, surgical characteristics, and complication rates were compared. Multivariate logistic regression models identified independent predictors of complications following surgery.ResultsA total of 196 patients met the inclusion criteria and were included in the study. The medical, surgical, and overall complication rates were 10.2%, 23.0%, and 29.1% respectively. Risk factors associated with medical complications in multivariate analysis included impaired ambulation status (odds ratio [OR], 2.27; p=0.02) and estimated blood loss over 500 mL (OR, 3.67; p=0.02). Multivariate analysis revealed preoperative narcotic use (OR, 2.43; p=0.02) and operative time (OR, 1.005; p=0.03) as risk factors for surgical complication, whereas antidepressant use was a protective factor (OR, 0.21; p=0.01). Overall complication was associated with preoperative narcotic use (OR, 1.97; p=0.04) and higher intraoperative blood loss (OR, 1.0007; p=0.03).ConclusionPreoperative narcotic use and estimated blood loss predicted the incidence of complications following PCLF for CSM. Ambulation status was a significant predictor of the development of a medical complication specifically. These results may help surgeons in counseling patients who may be at increased risk of complication following surgery
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