13,050 research outputs found
A study of the vocational pursuits of teachers' children
Not available.R. Harold VanCleaveNot ListedNot ListedMaster of ScienceDepartment Not ListedCunningham Memorial library, Terre Haute, Indiana State University.isua-thesis-1942-vancleave.pdfMastersTitle from document title page. Document formatted into pages: contains 43p. : ill. Includes appendix and bibliography
Comorbid Conditions in Idiopathic Pulmonary Fibrosis: Recognition and Management.
Idiopathic pulmonary fibrosis (IPF), a fibrosing interstitial pneumonia of unknown etiology, primarily affects older adults and leads to a progressive decline in lung function and quality of life. With a median survival of 3-5 years, IPF is the most common and deadly of the idiopathic interstitial pneumonias. Despite the poor survivorship, there exists substantial variation in disease progression, making accurate prognostication difficult. Lung transplantation remains the sole curative intervention in IPF, but two anti-fibrotic therapies were recently shown to slow pulmonary function decline and are now approved for the treatment of IPF in many countries around the world. While the approval of these therapies represents an important first step in combatting of this devastating disease, a comprehensive approach to diagnosing and treating patients with IPF remains critically important. Included in this comprehensive assessment is the recognition and appropriate management of comorbid conditions. Though IPF is characterized by single organ involvement, many comorbid conditions occur within other organ systems. Common cardiovascular processes include coronary artery disease and pulmonary hypertension (PH), while gastroesophageal reflux and hiatal hernia are the most commonly encountered gastrointestinal disorders. Hematologic abnormalities appear to place patients with IPF at increased risk of venous thromboembolism, while diabetes mellitus (DM) and hypothyroidism are prevalent metabolic disorders. Several pulmonary comorbidities have also been linked to IPF, and include emphysema, lung cancer, and obstructive sleep apnea. While the treatment of some comorbid conditions, such as CAD, DM, and hypothyroidism is recommended irrespective of IPF, the benefit of treating others, such as gastroesophageal reflux and PH, remains unclear. In this review, we highlight common comorbid conditions encountered in IPF, discuss disease-specific diagnostic modalities, and review the current state of treatment data for several key comorbidities
Complete Constant Mean Curvature surfaces and Bernstein type Theorems in
In this paper we study constant mean curvature surfaces in a product
space, , where is a complete
Riemannian manifold. We assume the angle function \nu = \meta{N}{\partial_t}
does not change sign on . We classify these surfaces according to the
infimum of the Gaussian curvature of the projection of .
When and , then is a cylinder over a
complete curve with curvature 2H. If H=0 and , then
must be a vertical plane or is a slice , or
with the flat metric and is a
tilted plane (after possibly passing to a covering space).
When , then is a vertical
cylinder over a complete curve of of constant geodesic curvature
. This result is optimal.
We also prove a non-existence result concerning complete multi-graphs in
, when
Zero nominal interest rates: why they're good and how to get them
This study shows that in a standard one-sector neoclassical growth model, in which money is introduced with a cash-in-advance constraint, zero nominal interest rates are optimal. Milton Friedman argued in 1969 that zero nominal rates are necessary for efficient resource allocation. This study shows that they are not only necessary but sufficient. The study also characterizes the monetary policies that will implement zero rates. The set of such policies is quite large. The only restriction these policies must satisfy is that asymptotically money shrinks at a rate no greater than the rate of discount.Interest rates
Phonon Decoherence of a Double Quantum Dot Charge Qubit
We study decoherence of a quantum dot charge qubit due to coupling to
piezoelectric acoustic phonons in the Born-Markov approximation. After
including appropriate form factors, we find that phonon decoherence rates are
one to two orders of magnitude weaker than was previously predicted. We
calculate the dependence of the Q-factor on lattice temperature, quantum dot
size, and interdot coupling. Our results suggest that mechanisms other than
phonon decoherence play a more significant role in current experimental setups.Comment: RevTex, 7 pages, 5 figures. v2: appendix added, more details
provided. Accepted for publication in PR
A comparison of two trusses for the space station structure
The structural performance of two truss configurations, the orthogonal tetrahedral and a Warren-type, are compared using finite element models representing the November Reference Phase 1 Space Station. The truss torsional stiffness properties and fundamental torsion frequency are determined using cantilever truss-beam models. Frequencies, mode shapes, transient response, and truss strut compressive loads are compared for the two space station models. The performance benefit resulting from using a high modulus truss strut is also presented. Finally, assembly and logistics characteristics of the two truss configurations are evaluated
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