Results 81 to 90 of about 2,042,250 (389)

Spin gap of the three-leg S=3/2 Heisenberg tube

open access: yes, 2011
The ground-state properties of the three-leg S=3/2 Heisenberg tube are studied using the density-matrix renormalization group method. We find that the spin-excitation gap associated with a spontaneous dimerization opens for the whole coupling regime, as ...
Fuji, Y., Nishimoto, S., Ohta, Y.
core   +1 more source

An analysis of outcomes of reconstruction or amputation after leg-threatening injuries.

open access: yesNew England Journal of Medicine, 2002
BACKGROUND Limb salvage for severe trauma has replaced amputation as the primary treatment in many trauma centers. However, long-term outcomes after limb reconstruction or amputation have not been fully evaluated.
M. Bosse   +12 more
semanticscholar   +1 more source

Photo‐Assisted Zn‐Iodine Battery via Bifunctional Cathode with Iodine Host and Solar Response Boost

open access: yesAdvanced Functional Materials, EarlyView.
A bifunctional cathode based on BiOI materials is developed for photo‐assisted Zn‐iodine batteries, serving as both an iodine host and a solar‐responsive material. This design enables dual reaction routes involving vacancy‐based iodine storage and reversible two steps iodine redox.
Hai Xu   +4 more
wiley   +1 more source

Comparative Study of Traveling and Standing Wave-Based Locomotion of Legged Bidirectional Miniature Piezoelectric Robots

open access: yesMicromachines, 2021
The use of wave-based locomotion mechanisms is already well established in the field of robotics, using either standing waves (SW) or traveling waves (TW).
Jorge Hernando-García   +3 more
doaj   +1 more source

Leg symptoms in peripheral arterial disease: associated clinical characteristics and functional impairment.

open access: yesJournal of the American Medical Association (JAMA), 2001
CONTEXT Persons with lower-extremity peripheral arterial disease (PAD) are often asymptomatic or have leg symptoms other than intermittent claudication (IC).
M. McDermott   +13 more
semanticscholar   +1 more source

Magnetic Field‐Assisted Conductive Nerve Guidance Conduit Enabling Peripheral Nerve Regeneration with Wireless Electrical Stimulation

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces a conductive nerve guidance conduit integrated with wireless electrical stimulation through alternating magnetic fields, which induces currents and creates a supportive microenvironment for nerve regeneration. In vivo studies show that this approach significantly enhanced myelin restoration, gastrocnemius muscle regeneration ...
Shiheng Liu   +7 more
wiley   +1 more source

Diagnostic Efficacy of Digital Dermoscopy and Clinical Findings in Thin Melanoma of the Lower Limbs

open access: yesActa Dermato-Venereologica, 2017
The introduction of dermoscopy has improved the accuracy of diagnosis of melanoma. However, early stage melanoma can be difficult to diagnose. Eighty-nine cases of thin melanoma with a Breslow thickness ≤1 mm located on the lower limb and diagnosed ...
Emi Dika   +7 more
doaj   +1 more source

Butterfly‐Inspired Hierarchical Hybrid Composites for Lightweight Structural Thermal Management Applications

open access: yesAdvanced Functional Materials, EarlyView.
Emulating nature's unparalleled engineering, this work introduces butterfly‐inspired hybrid composites for high‐performance transportation and defense sectors. Leveraging biomimicry, these lightweight composites feature butterfly leg‐inspired hierarchical fibrous assemblies and butterfly wing‐inspired sandwich‐structured architecture, to achieve ...
Nello D. Sansone   +7 more
wiley   +1 more source

Cable-Driven Actuation for Highly Dynamic Robotic Systems

open access: yes, 2018
This paper presents design and experimental evaluations of an articulated robotic limb called Capler-Leg. The key element of Capler-Leg is its single-stage cable-pulley transmission combined with a high-gap radius motor.
Hutter, Marco   +3 more
core   +1 more source

Dead Legs: A Case of Bilateral Leg Paralysis [PDF]

open access: yesClinical Practice and Cases in Emergency Medicine, 2017
Aortoiliac occlusive disease (AOD) is a rare presentation of thrombosis of the abdominal aorta. Also known as Leriche syndrome, its classic description entails claudication of the buttocks, thighs, and calves, absent femoral pulses, and impotence. AOD risk factors include smoking, hypertension, hyperlipidemia, diabetes, chronic renal insufficiency, and
Quenzer, Faith   +2 more
openaire   +4 more sources

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