632 research outputs found
Optimal combinations of acute phase proteins for detecting infectious disease in pigs
Peer reviewedPublisher PD
MC4.3 - Optically Coupled Mode-Locked Laser Array for Spectroscopy in InP Generic Integration
We propose a two-element mode-locked laser
array operating at 1.56 µm. Optical pulses with 14.5-ps width,
spectral bandwidth exceeding 7 nm, and RF line width of 260
kHz at 12.448 GHz are experimentally reported
Sinovitis villonodular pigmentada difusa: Revisión de 13 casos
Se hace un estudio retrospectivo de trece pacientes con Sinovitis Villonodular pigmentada, seis localizadas en la rodilla, dos en la muñeca y pie, y uno en tobillo, cadera y codo respectivamente. En cinco de los casos existía una afectación del hueso. Se hace una revisión bibliográfica sobre la etiopatogenia, radiología, métodos diagnósticos y tratamientoA retrospective study of thirteen patients with pigmented villonodular synovitis was made. Six cases were localized in the knee, two in the wrist and feet, and one in ankle, hip and elbow. Five case showed bone invasion, the pathogenesis, radiographical appearance, diagnosis and treatment are discussed
Hallazgos electromiográficos y electroneurográficos en el pie cavo esencial
La etiología del pie cavo cuando ésta es conocida, suele ser debida a un trastorno
de tipo neurológico o miopático, aunque en determinados casos nos encontramos con pacientes
que padecen esta deformidad en el pie, en los cuales no podemos descubrir ningún
antecedente de este tipo, por lo que lo calificamos de pie cavo «esencial». A un grupo de estos
pacientes con pie cavo «esencial», en los que no hemos encontrado ningún tipo de antecedente
neurológico, lo hemos sometido a una exploración electroneurográfica, encontrando que la
mitad de ellos padecían algún trastorno neuropático/miopático, que no había sido detectado
en la exploración clínica inicial.Neurological or myopathic diseases are frequently involved in the etiology of flat
foot. In some cases, no antecedents of disease can be found and therefore these flat foots are
classified as «essential». We have undertaken an electrophysiologic study in a series of patients
with «essential» flat food in order to explore unsuspected neurological disorders. In half of the
patients, neuropathic and myopathic electroneurographic patterns of different severity were detected
Afectación tumoral del sistema nervioso periférico
Se han estudiado 18 pacientes con afectación del S.N.P. por lesiones tumorales tratados en nuestra unidad en un período de 8 años. La mayoría de estos tumores tenían una localización intraneural (14 casos), eran de naturaleza benigna (13 casos) y afectaban al miembro superior. La prueba diagnóstica más exacta fue la R.M.N. Destacamos la existencia en nuestra seria de algunos tumores de rara presentación en la clínica, como un caso de fibrolipoma, condroma intraneural y neurosarcoma de la variedad "Tritón", respectivamente.Eighteen patients who had tumours of peripheral nerves have been studied retrospectively. They were treated in our department for eight years. Most of these tumours were placed intraneuraly (14 cases), were benignant (13 cases), and located in the upper limb. The most precise test for diagnosis was the MRI. We want to emphasize the existence in our series of some tumours which rarely appears in clinic, for example a Fibrolipoma, a intraneural chondroma and a malignant triton tumour
Numerical integration of variational equations
We present and compare different numerical schemes for the integration of the
variational equations of autonomous Hamiltonian systems whose kinetic energy is
quadratic in the generalized momenta and whose potential is a function of the
generalized positions. We apply these techniques to Hamiltonian systems of
various degrees of freedom, and investigate their efficiency in accurately
reproducing well-known properties of chaos indicators like the Lyapunov
Characteristic Exponents (LCEs) and the Generalized Alignment Indices (GALIs).
We find that the best numerical performance is exhibited by the
\textit{`tangent map (TM) method'}, a scheme based on symplectic integration
techniques which proves to be optimal in speed and accuracy. According to this
method, a symplectic integrator is used to approximate the solution of the
Hamilton's equations of motion by the repeated action of a symplectic map ,
while the corresponding tangent map , is used for the integration of the
variational equations. A simple and systematic technique to construct is
also presented.Comment: 27 pages, 11 figures, to appear in Phys. Rev.
External optical self-injection stabilization of an InP generic foundry platform based passively mode-locked ring laser
Timing stabilization of a photonic integrated circuit extended cavity passively mode-locked semiconductor ring laser with four gain sections and two saturable absorbers in a symmetric ring geometry by optical self-injection is presented. The laser has been fabricated using an InP generic integration technology platform. Repetition rate tuning up to 5.5MHz and a timing jitter reduction by optical self-injection from 99 fs (solitary laser operation) to 20 fs is demonstrated. The experimental results are in excellent agreement with results obtained by a stochastic time domain model which yet had been solely applied to edge-emitting straight waveguide semiconductor lasers
Integrated Photonics for Wireless and Satellite Applications
The concept of using Photonic Integrated Circuits for generation of tunable mm-wave signals for wireless and satellite communication application is presented. The paper outlines the requirements for frequency stabilization and power consumption of semiconductor lasers when implemented in terrestrial wireless and satellite communication applications
Global Waste Management Outlook
The Global Waste Management Outlook, a collective effort of the United Nations Environment Programme and the International Waste Management Association, is a pioneering scientific global assessment on the state of waste management and a call for action to the international community. Prepared as a follow up to the Rio+20 Summit and as a response to UNEP Governing Council decision GC 27/12, the document establishes the rationale and the tools for taking a holistic approach towards waste management and recognizing waste and resource management as a significant contributor to sustainable development and climate change mitigation. To complement the Sustainable Development Goals of the Post-2015 Development Agenda, the Outlook sets forth Global Waste Management Goals and a Global Call to Action to achieve those goals
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