48 research outputs found
Sutureless aortic valve replacement for aortic incompetence.
No full textOBJECTIVE:
Sutureless prostheses for surgical aortic valve replacement (AVR) are usually used in degenerative calcified aortic stenosis. Less is known on the application of sutureless prostheses for pure aortic incompetence.
METHODS:
Between 2011 and 2014, 442 patients were operated on with the Perceval aortic sutureless valve implant. We identified 11 patients (10 female, mean age 70.5) who underwent sutureless AVR for pure aortic incompetence (off-label use). Three patients had a left ventricle ejection fraction of 30% or less. Mean logistic EuroSCORE was 15.2 (range 2.2-45.2). In five patients associated mitral procedures (three [60%] repair and two [40%] replacement) were performed. Four procedures were performed through a minimally invasive approach (three right minithoracotomies and one partial sternotomy).
RESULTS:
Mean cardiopulmonary bypass time was 130.2 min and aortic cross clamp time was 82.2 min. Mean implanted prosthesis size was 24.5 ± 1.3 (median 25) mm (insignificant correlation with preoperative aortic valve annulus measurement by transthoracic echocardiography: 21.6 ± 1.5 [median 21] mm, Pearson's r = 0.373, p = 0.259). One patient died on 24th day after AVR associated with aortic arch replacement and hypothermic circulatory arrest (10 years after correction for type A aortic dissection). No residual para- or intravalvular leakage was present on discharge and 12-month follow-up. No migration of the prosthesis occurred.
CONCLUSION:
Sutureless AVR is an option in selected patients with aortic incompetence. Preoperative aortic annulus measurement by echocardiography has poor predictive value for estimation of prosthetic valve size
MICROWAVE SPECTRUM OF
No full textAuthor Institution: Department of Physics, Texas Tech University LubbockLast year at this meeting we reported our preliminary results for the torsional-rotational spectra of and . At the current meeting we will report additional data for and the results of our analysis. The Hamiltonian for the analysis of the spectroscopic data for the three substates or the torsional ground state has the form \begin{eqnarray*} H_{\sigma}\qquad&=&\qquad A_{\sigma} P_{z}^{2}+B_{\sigma} P_{y}^{2}+\beta_{\sigma} J(J+1)K^{2}+\gamma_{\sigma} j^{2}(J+1)^{2}+\varepsilon_{\sigma} \\ {}^{H}c_{1},o_{1}&=&Q^{\prime} P_{z}+D^{\prime}(P_{x}P_{y}+P_{y}P_{x})+E^{\prime}(P_{x}P_{z}+P_{z}P_{x}) .\end{eqnarray*} The spectroscopic coefficients as determined by a least squares fit are [FIGURE
A research on Performance of DSH Library Business Department
No full text摘要 本文从以下四个方面进行论述。首先论文作者从绩效考核的相关理论知识入手,阐述了绩效与绩效考核的基本概念,并对当前主流的几种绩效考核方法从特征、适用对象、优缺点等进行了对比分析，为绩效优化设计提供了基本的理论参考。其次作者以DSH图书馆为实际案例，对其当前形势下的业务范围、组织架构和人员结构等整体情况进行了介绍，并对其绩效考核现状进行了研究。作者结合问卷调查，归纳出了DSH图书馆当前绩效考核执行过程中存在的一些突出问题，并对这些问题产生的原因进行了探讨。接着根据DSH图书馆管理层的讨论决定，选用关键绩效指标考核体系作为绩效考核优化的基本思路，并在此基础上做出了一些制度设计，包括组织架构、操...Abstract This thesis will be discussed from four aspects. First of all, the author starts from the basic theory of performance evaluation, and explains the basic concepts of performance and performance evaluation. And the research and analysis are made among those common performance evaluation methods to show the characteristic, suitable object, the advantages and disadvantages, then the scheme a...学位：工商管理硕士院系专业：管理学院_工商管理硕士(MBA)学号：1792012115066
First in the Nation in Education : Final Report,1984.
No full textThis report is one step in an ongoing process of change and is a plea for commitment for high standards in education in Iowa. Contains the final reports of the six subcommittees as adopted by the Excellence in Education Task Force, and the five recommendations made by the Task Force
Adolescents Who Self Harm: A Comparison of Those Who Go to Hospital and Those Who Do Not
No full textBackground: Deliberate self harm (DSH) by adolescents is a major problem at both hospital and community levels although little is known about the factors associated with hospital presentation. Method: Using a community survey a comparison was undertaken of adolescents in 41 schools who reported DSH and presented to hospital with those who reported DSH but did not attend hospital. Results: While hospital presentation following DSH was associated with several factors, multivariate analysis indicated that the most important were method of DSH (overdose, methods other than self-cutting and multiple methods) and help-seeking before the act. Conclusions: The few differences between adolescents who present to hospital following DSH and those who do not, other than in method of DSH and prior help-seeking, highlight the need for primary preventive initiatives. © 2009 The Author. Journal compilation © 2009 Association for Child and Adolescent Mental Health
Author verification of Nahj Al-Balagha
No full textThis is an accepted manuscript of an article published by OUP in Digital Scholarship in the Humanities on 20/01/2022.
The accepted version of the publication may differ from the final published version. Available online at https://doi.org/10.1093/llc/fqab103The primary purpose of this paper is author verification of the Nahj Al-Balagha, a book attributed to Imam Ali and over which Sunni and Shi’i Muslims are proposing different theories. Given the morphologically complex nature of Arabic, we test whether morphological segmentation, applied to the book and works by the two authors suspected by Sunnis to have authored the texts, can be used for author verification of the Nahj Al-Balagha. Our findings indicate that morphological segmentation may lead to slightly better results than whole words, and that regardless of the feature sets, the three sub-corpora cluster into three distinct groups using Principal Component Analysis, Hierarchical Clustering, Multi-dimensional Scaling and Bootstrap Consensus Trees. Supervised classification methods such as Naive Bayes, Support Vector Machines, k Nearest Neighbours, Random Forests, AdaBoost, Bagging and Decision Trees confirm the same results, which is a clear indication that (a) the book is internally consistent and can thus be attributed to a single person, and (b) it was not authored by either of the suspected authors
The Structure and Fluid Flow Analysis for a New DSH Dynamic - Static Combined Mixer
No full textA new DSH type dynamic-static combined mixer, which combines the advantages of dynamic mixing agitator and SH type static mixer, with the structure of alternative connection of the turning impeller, liquid shunt unit and double-barreled helical stationary blade, is original designed by the author. The allotype impeller is driven by the two-phase flow and meanwhile the two-phase flow is sheared by the allotype impeller. The double helix eddy flow is formed out of two-phase flow by the stationary blade due to the shearing effect of allotype impeller which results in the improvement of mixture efficiency. The most characteristic of this design is: the mixture is driven by the dynamic force of liquid itself, therefore the energy is saved and the mixture efficiency is enhanced. Followed by the illustration of the structure, the preliminary analysis of the flow field is carried out, which provides some proofs for the selection and optimization of the static-dynamic combined high efficient mixer structural parameters.</jats:p
Davidsonian semantic theory and cognitive science of religion
No full textThis article investigates the extent to which the cognitive science of religion (CSR) and Donald Davidson’s semantic holism (DSH) harmonize. We first characterize CSR, philosophical
semantics (and more specifically DSH). We then note a prima facie tension between CSR
and DSH’s view of First-Person Authority (that we know what is meant when we speak in a
way that we do not when others speak). If CSR is correct that the causes of religious belief
are located in cognitive processes in the mind/brain, then religious insiders might have no
idea what they are talking about: only the scholar of CSR would have a chance of knowing
what they ‘really’ mean. The article argues that the resolution to this problem is to take
seriously DSH’s rejection of semantic bifurcation, specifically rejecting the idea that religious and non-religious language can be sharply distinguished. We conclude by supporting
the following claims: (i) common cognitive neural/psychological processes are explanatorily
relevant in proposed meaning-theories for any discourse, and (ii) those processes need
semantic supplementation with reference to external and naturalistic factors (biological,
cultural, environmental etc.)
Who wrote Wuthering Heights?
No full textEmily Brontë published Wuthering Heights in 1847 under the pseudonym Ellis Bell. It was not until the later second edition, published after Emily’s death, that she was credited as the novel’s author. Those Victorian attitudes towards women which compelled Brontë to publish as Bell have not been wholly eradicated, with her legitimacy as the sole author being called into question by male commentators at several junctures since. Their claim is that Emily’s brother Branwell is the real author of Wuthering Heights. Using stylometry, a computer-assisted technique which measures the likely author of a text, this brief experiment demonstrates that it is highly unlikely that Branwell Brontë contributed to the writing of Wuthering Heights, and that Emily, as generally considered, is the novel’s sole author. Furthermore, considering a number of limitations with the corpus being tested, this study provides a good and necessary example of stylometry in practice, and how such an experiment should be conducted in less-than-ideal circumstances
Wood biomass functions for Acacia abyssinica trees and shrubs and implications for provision of ecosystem services in a community managed exclosure in Tigray, Ethiopia
No full textIn the Ethiopian highlands, remarkable recovery of vegetation has been achieved using exclosures, protecting vegetation against livestock browsing and firewood harvesting. But these emerging forest resources require tools for sustainable use, implying knowledge on biomass stocks and growth. In this study we developed biomass functions estimating total, stem and branch biomass from diameter at stump height (DSH) and tree height (H) for an 11-year old exclosure in Tigray, Ethiopia. In a systematic
grid of 55 plots, DSH and H of all trees and shrubs were recorded. 40 Acacia abyssinica trees were selected
for destructive sampling. Allometric relationships using a natural logelog model were established between
aboveground biomass, DSH and H. Models with only DSH were found best with R2 between 0.95
and 0.98. The functions were 10 fold cross-validated and R2
_cv ranged from 0.94 to 0.97, indicating good
model performance. The models were found well in range with those of other seasonal forests in East
Africa. Total aboveground biomass was estimated 25.4 ton ha1 with an annual production of 2.3 ton ha 1, allowing sustainable wood fuel use for 4 persons ha1. The presented predictive functions help to harmonize between ecological and societal objectives and are as such a first step towards an integrated planning tool for exclosures.sponsorship: The study was funded by the Swedish International Development Agency (SIDA), as part of the support to the forestry education in Ethiopia. The first author acknowledges a PhD grant from the VLIR IUC program with Mekelle University. (Swedish International Development Agency (SIDA), VLIR IUC program, Mekelle University)status: Publishe
