Results 31 to 40 of about 317,686 (280)
Lung volumes identify an at-risk group in persons with prolonged secondhand tobacco smoke exposure but without overt airflow obstruction. [PDF]
, 2018 IntroductionExposure to secondhand smoke (SHS) is associated with occult obstructive lung disease as evident by abnormal airflow indices representing small airway disease despite having preserved spirometry (normal forced expiratory volume in 1 s-to ...
Arjomandi, Mehrdad +9 more
core +2 more sources
Long-Lived Counters with Polylogarithmic Amortized Step Complexity [PDF]
, 2019 A shared-memory counter is a well-studied and widely-used concurrent object. It supports two operations: An Inc operation that increases its value by 1 and a Read operation that returns its current value.
Baig, Mirza Ahad +3 more
core +1 more source
The Period-Index Obstruction for Elliptic Curves
Journal of Number Theory, 2002 Consider an elliptic curve \(E\) defined over a field \(K\) with absolute Galois group \(G_K\). The elements of \(H^1(G_K,E)\) can be interpreted as isomorphism classes of principal homogeneous spaces \(C\) of \(E\). The order \(n\) of such an element \(C\) in \(H^1(G_K,E)\) is called its period; the index of \(C\) is the smallest positive integer \(d\)
openaire +2 more sources
Arithmetic purity of strong approximation for homogeneous spaces [PDF]
, 2018 We prove that any open subset $U$ of a semi-simple simply connected quasi-split linear algebraic group $G$ with ${codim} (G\setminus U, G)\geq 2$ over a number field satisfies strong approximation by establishing a fibration of $G$ over a toric variety ...
Cao, Y., Liang, Y., Xu, F.
core +3 more sources
Is the Peak-to-Mean Pressure Gradient Ratio Useful for Assessment of Aortic Valve Prosthesis Obstruction? [PDF]
Journal of Tehran University Heart Center, 2010 Background: The evaluation of prosthetic valves is very difficult with two-dimensional transthoracic echocardiography alone. Doppler and color flow imaging as well as transesophageal echocardiography are more reliable to detect prosthetic valve ...
Maryam Esmaeilzadeh +5 more
doaj +1 more source
The assessment of acute pulmonary embolism severity using CT angiography features
International Journal of Emergency Medicine, 2020 Background This study was conducted to detect the association between radiologic features of CT pulmonary angiography (CTPA) and pulmonary embolism severity index (PESI).
Azin Shayganfar +3 more
doaj +1 more source
A Mathematical Analysis of the Axial Anomaly
, 2018 As is well known to physicists, the axial anomaly of the massless free fermion in Euclidean signature is given by the index of the corresponding Dirac operator.
Rabinovich, Eugene
core +1 more source
FPT is Characterized by Useful Obstruction Sets [PDF]
, 2013 Many graph problems were first shown to be fixed-parameter tractable using the results of Robertson and Seymour on graph minors. We show that the combination of finite, computable, obstruction sets and efficient order tests is not just one way of ...
Fellows, Michael R., Jansen, Bart M. P.
core +1 more source
The topological period-index problem over 6-complexes
, 2013 By comparing the Postnikov towers of the classifying spaces of projective unitary groups and the differentials in a twisted Atiyah-Hirzebruch spectral sequence, we deduce a lower bound on the topological index in terms of the period, and solve the ...
Antieau, Benjamin, Williams, Ben
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source