Results 51 to 60 of about 23,228 (258)

The Jordan Curve Theorem, Formally and Informally [PDF]

open access: yesThe American Mathematical Monthly, 2007
(2007). The Jordan Curve Theorem, Formally and Informally. The American Mathematical Monthly: Vol. 114, No. 10, pp. 882-894.
openaire   +2 more sources

Monoallelic POLR3A Variants Cause Early‐Onset Peripheral Neuropathy

open access: yesAnnals of Neurology, EarlyView.
Objective Biallelic variants in genes encoding the RNA polymerase III complex (Pol III) cause a spectrum of neurological disorders primarily affecting the central nervous system. Monoallelic variants have been reported in the POLR3B subunit only, associated with neurodevelopmental disorder, epilepsy, and peripheral neuropathy.
Luiza L. P. Ramos   +46 more
wiley   +1 more source

Jordan Curves: Ramsey Approach and Topology

open access: yesMathematics
We develop a topological-combinatorial framework applying classical Ramsey theory to systems of arcs connecting points on Jordan curves and their higher-dimensional analogues.
Edward Bormashenko
doaj   +1 more source

Diagnostic Efficacy of Photostimulated Chemiluminescence Assay for Detecting Anti-HIV Antibodies: A Retrospective Study

open access: yesPolish Journal of Microbiology, 2023
The transmission of human immunodeficiency virus (HIV) through blood poses a slightly increased risk. As a result, patients requiring blood transfusions should be screened for HIV antibodies.
Han Jianxiang   +3 more
doaj   +1 more source

The Complexity of Proving the Discrete Jordan Curve Theorem [PDF]

open access: yes22nd Annual IEEE Symposium on Logic in Computer Science (LICS 2007), 2007
The Jordan curve theorem (JCT) states that a simple closed curve divides the plane into exactly two connected regions. We formalize and prove the theorem in the context of grid graphs, under different input settings, in theories of bounded arithmetic that correspond to small complexity classes. The theory V 0
Phuong Nguyen 0001, Stephen A. Cook
openaire   +2 more sources

Application of GIS-based SCS-CN method in West Bank catchments, Palestine

open access: yesWater Science and Engineering, 2010
Among the most basic challenges of hydrology are the prediction and quantification of catchment surface runoff. The runoff curve number (CN) is a key factor in determining runoff in the SCS (Soil Conservation Service) based hydrologic modeling method ...
Sameer Shadeed, Mohammad Almasri
doaj   +1 more source

An Agonist/Antagonist Photo‐Switchable Vitamin D Mimetic Enables Bidirectional Optical Control of VDR

open access: yesAngewandte Chemie International Edition, EarlyView.
Vitamin D exhibits complex and cell‐specific biological effects in multiple tissues via activation of the ligand‐sensing transcription factor vitamin D receptor (VDR). The photo‐switchable vitamin D mimetic 10 transitions between VDR antagonist (E) and agonist (Z) activity upon illumination and offers unprecedented bidirectional optical control over ...
Xiu Ge   +11 more
wiley   +1 more source

Cauchy projectors on non-smooth and non-rectifiable curves

open access: yesПроблемы анализа, 2019
Let f (t) be defined on a closed Jordan curve Γ that divides the complex plane on two domains D + , D − , ∞ ∈ D − . Assume that it is representable as a difference f (t) = F + (t) − F − (t), t ∈ Γ, where F ± (t) are limits of a holomorphic in C \ Γ ...
Kats B. A.   +2 more
doaj   +1 more source

Optimized Selenium‐Doped Nanocomposites for Enhanced Polymer Gel Performance in Permeability Reduction

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Excessive water production in mature oil fields necessitates robust shut‐off treatments, yet conventional polymer gels often fail under high‐temperature and high‐salinity conditions. This study aims to enhance gel thermal stability and mechanical strength by incorporating selenium‐doped Ag/AgO–ZnO nanocomposites synthesized via a novel green ...
Fadhil F. Sead   +8 more
wiley   +1 more source

Synergistic Physicochemical Inhibition of Reactive Shale Formations Using Hydrothermally Synthesized Hydroxyapatite Nickel Tungstate Nanocomposites in Water‐Based Drilling Fluids

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Wellbore instability driven by the volumetric expansion of reactive shale formations remains a primary operational challenge in modern drilling engineering, causing severe mechanical failures and substantial economic deficits. The objective of this study is to formulate and evaluate a novel dual‐action chemical additive capable of ...
Ghaleb Oriquat   +8 more
wiley   +1 more source

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