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On the Spielman-Teng Conjecture [PDF]

open access: greenGeometric and Functional Analysis
Let $M$ be an $n\times n$ matrix with iid subgaussian entries with mean $0$ and variance $1$ and let $σ_n(M)$ denote the least singular value of $M$. We prove that \[\mathbb{P}\big( σ_{n}(M) \leq \varepsilon n^{-1/2} \big) = (1+o(1)) \varepsilon + e^{-Ω(n)}\] for all $0 \leq \varepsilon \ll 1$.
Sah, Ashwin   +2 more
openaire   +4 more sources

Design and Optimization of a Spiral Electrode Triboelectric Nanogenerator Using Response Surface Methodology

open access: yesAdvances in Electrical and Electronic Engineering, 2022
Triboelectric nanogenerator is a promising technology and emerging approach for harvesting environmental mechanical energy. However, because of nature of the environmental mechanical motions, the amplitude and direction of the movements are unpredictable.
Mohammadali Heydari   +2 more
doaj   +1 more source

Identification of the Superficial Peroneal Nerve: Is the Ankle Plantar Flexion Fourth Toe Flexion Sign Useful in a South-East Asian Population? [PDF]

open access: yesJournal of Foot and Ankle Surgery (Asia Pacific), 2023
Aim and background: Iatrogenic injury to the superficial peroneal nerve (SPN) can occur during surgery on the foot or ankle. The purpose of the study was to evaluate the prevalence of the SPN clinically when using the ankle plantar flexion fourth toe ...
Yuet Peng Khor   +3 more
doaj   +1 more source

A Triboelectric Nanogenerator Based on a Pendulum-Plate Wave Energy Converter

open access: yesPolish Maritime Research, 2022
Ocean waves are a promising source of renewable energy, but harvesting this irregular low-frequency energy is challenging due to technological limitations. In this paper, a pendulum plate-based triboelectric nanogenerator (PP-TENG) is proposed.
Zhu Shenglin   +6 more
doaj   +1 more source

When Tuberculosis Co-Presenting with COVID-19 Becomes a Challenge, Case Report and Short Review

open access: yesCase Reports in Clinical Practice, 2023
With current SARS-CoV-2 pandemic, patients with respiratory symptoms are diagnosed with SARS-CoV-2 more readily, but we may oversee some prevalent infective diseases that may co-exist.
Tan Ching Yee   +3 more
doaj   +1 more source

The impact of a ‘milking the COW’ campaign in a regional hospital in Singapore

open access: yesAntimicrobial Resistance and Infection Control, 2021
Background Computerisation of various processes in hospitals and reliance on electronic devices raises the concern of contamination of these devices from the patient environment.
Surinder Kaur M. S. Pada   +12 more
doaj   +1 more source

Subcutaneous fast-acting insulin analogues, alone or in combination with long-acting insulin, versus intravenous regular insulin infusion in patients with diabetic ketoacidosis: protocol for an updated systematic review and meta-analysis of randomised trials

open access: yesBMJ Open, 2023
Introduction Diabetic ketoacidosis (DKA) is traditionally managed using intravenous regular insulin infusion (RII) in intensive care unit (ICU)/high dependency unit (HDU).
Beng Leong Lim   +4 more
doaj   +1 more source

Rare case of Torsades de Pointes in severe hypothyroidism: literature review and challenges in management

open access: yesInternational Journal of Emergency Medicine, 2022
Background Hypothyroidism can manifest as several important cardiac abnormalities. There are few reports of ventricular dysrhythmias (VDs) in hypothyroidism.
Berlin Lee, Wei Feng Lee, Beng Leong Lim
doaj   +1 more source

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