Wyniki wyszukiwania dla: C. Ursu

Pozycje od 1 do 14 spośród 14 wyników

artykuł

Regenerative peripheral nerve interface free muscle graft mass and function

Yaxi Hu, Daniel C. Ursu, Racquel A. Sohasky, Ian C. Sando, więcej

Background Regenerative peripheral nerve interfaces (RPNIs) transduce neural signals to provide high‐fidelity control of neuroprosthetic devices. Traditionally, rat RPNIs are constructed with ~150 mg of free skeletal muscle grafts. It is unknown whether larger free muscle grafts allow RPNIs to transduce greater signal. Methods RPNIs were constructed by securing skeletal muscle grafts of various...

artykuł

Regenerative peripheral nerve interfaces for real-time, proportional control of a Neuroprosthetic hand

Christopher M. Frost, Daniel C. Ursu, Shane M. Flattery, Andrej Nedic, więcej

Journal of NeuroEngineering and Rehabilitation > 2018 > 15 > 1 > 1-9

Introduction Regenerative peripheral nerve interfaces (RPNIs) are biological constructs which amplify neural signals and have shown long-term stability in rat models. Real-time control of a neuroprosthesis in rat models has not yet been demonstrated. The purpose of this study was to: a) design and validate a system for translating electromyography (EMG) signals from an RPNI in a rat model into real-time...

artykuł

Excimer laser ablation of graphite: The enhancement of carbon dimer formation

C. Ursu, P. Nica, C. Focsa

Applied Surface Science > 2018 > 456 > C > 717-725

Carbon plasmas produced by laser ablation can have important applications in the synthesis of nanostructured materials of high current interest (nanotubes, nanowires, graphene) or the deposition of diamond-like thin films. Understanding the fundamental aspects of such transient plasmas in various experimental configurations is useful for optimization of these synthesis/deposition processes. We report...

artykuł

Douleur de hanche fébrile chez un adolescent judoka

T. Langlais, C. Morin, M.A. Poumellec, C. Ursu, więcej

Science & Sports > 2017 > 32 > 5 > 312-315

Piriformis syndrome is a frequent pathology in the athlete. Diagnostic delay is often observed.A young man of 14 years old, a high-level judoka, presented a febrile right hip pain. Clinical examination coupled with imaging and biology revealed a Staphylococcus aureus pyomyositis of the piriformis muscle. This infection required a medical treatment only. The adolescent had to observe two-month rest...

artykuł

Dysplasie de hanche de l’adolescent et maladie de Charcot-Marie-Tooth

T. Langlais, J.-C. Leonard, C. Ursu, C. Morin

Archives de P�diatrie > 2017 > 24 > 7 > 675-681

Charcot-Marie-Tooth disease (CMT) is classified into hereditary motor and sensory neuropathy and can induce severe neuro-orthopaedics deformities, disabling at an early age. Hip dysplasia is present in 6% of CMT patients affecting preferentially CMT1 patients and can appear from the age of 8 years. The pathophysiological is paradoxical because we are confronted with proximal osteoarthritis deformations...

artykuł

Reply to the letter by C.J. Fontaine

C. Morin, C. Ursu, C. Delecourt

Orthopaedics & Traumatology: Surgery & Research > 2017 > 103 > 3 > 473

artykuł

Total hip replacement in young non-ambulatory cerebral palsy patients

C. Morin, C. Ursu, C. Delecourt

Orthopaedics & Traumatology: Surgery & Research > 2016 > 102 > 7 > 845-849

The everyday life of a non-ambulatory adolescent or young adult with cerebral palsy can be severely impaired by a painful or stiff hip. The usual surgical solutions such as proximal femoral resection (PFR) are not entirely satisfactory for pain relief, and are mutilating.A retrospective study assessed the impact of total hip replacement (THR) on such impairment, on the hypothesis that it is more effective...

artykuł

Reactive multi-pulse HiPIMS deposition of oxygen-deficient TiOx thin films

V. Tiron, I.-L. Velicu, M. Dobromir, A. Demeter, więcej

Thin Solid Films > 2016 > 603 > C > 255-261

The reactive high power impulse magnetron sputtering operated in multi-pulse mode (m-HiPIMS) of a pure Ti target in Ar/O₂ gas mixture (0.2% O₂ of the total mass flow rate) has been used for the deposition of amorphous titanium oxide (TiO_x) thin films with variable stoichiometry (x<2). The m-HiPIMS employed a pulsing scheme consisting in repetition with low frequency (400–800Hz) of sequences of...

artykuł

Alternative Route for Obtaining ${\rm NiFe}_{2}{\rm O}_{4}$ Thin Films by Pulsed Laser Deposition

S. M. Stratulat, C. Ursu, O. F. Caltun

IEEE Transactions on Magnetics > 2013 > 49 > 1-1 > 22 - 25

Ferrites in thin film form are usually obtained by pulsed laser deposition (PLD). This method can induce the presence of secondary phases, a problem which requires an annealing process. The study aimed at finding a PLD based method through which, in further studies, ferrites with a controllable phase composition can be obtained. Therefore, we obtained ferrite thin films in oxygen atmosphere and in...

artykuł

Attitudes of Ghanaian women toward genetic testing for sickle cell trait

Paula T. Ross, Monica L. Lypson, Daniel C. Ursu, Lesley A. Everett, więcej

International Journal of Gynecology and Obstetrics > 2011 > 115 > 3 > 264-268

To explore the attitudes of Ghanaian women toward genetic testing for the sickle cell trait and to investigate key factors that promote or impede the decision to pursue knowledge of the carrier status.A survey, administered in person to Ghanaian women, collected demographic information and information on the participants’ knowledge about their carrier status, their attitudes toward genetic testing,...

artykuł

Al₂O₃ ceramics under high-fluence irradiation: plasma plume dynamics through space- and time-resolved optical emission spectroscopy

C. Ursu, O. G. Pompilian, S. Gurlui, P. Nica, więcej

Applied Physics A > 2010 > 101 > 1 > 153-159

The dynamics of a transient laser ablation plasma plume has been investigated by means of space- and time-resolved optical emission spectroscopy (OES), through a high-resolution monochromator and a fast gate ICCD camera. The experiments have been carried out with the third harmonic (355 nm) of a Q-switched (10 ns) Nd:YAG laser focused on Al₂O₃ samples placed in a vacuum chamber (10⁻⁷ Torr). The splitting...

artykuł

Laser ablation of AsxSe100−x chalcogenide glasses: Plume investigations

C. Focsa, P. Nemec, M. Ziskind, C. Ursu, więcej

Applied Surface Science > 2009 > 255 > 10 > 5307-5311

The use of amorphous chalcogenides offers advantages such as remarkable optical properties like a wide transmission window (∼1–20μm) depending upon composition, making them suitable for sensitive detection of clinical or environmental changes. They also present interesting high (non)linear refractive indices, photorefractive effects, and other properties interesting for wavelength conversion, all-optical...

artykuł

Space- and time-resolved optical diagnosis for the study of laser ablation plasma dynamics

C. Ursu, S. Gurlui, C. Focsa, G. Popa

Nuclear Inst. and Methods in Physics Research, B > 2009 > 267 > 2 > 446-450

The dynamics of transient plasmas generated by high-fluence nanosecond laser ablation has been investigated by means of optical methods (time- and space-resolved emission spectroscopy and fast ICCD imaging). Systematic measurements have been carried out on plasma produced in vacuum (10 ⁻⁸ Torr residual pressure) by Nd:YAG laser (10ns, 532nm) irradiation of Aluminum targets. Al neutral atoms...

artykuł

BRAVO TIMES TWO

Samuel C. Ursu

The Journal of the American Dental Association > 2001 > 132 > 5 > 578

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