BACKGROUND Polyetheretherketone (PEEK) rod system is a novel pedicle-based dynamic stabilization system. This study evaluated clinical and radiographic outcomes of non-fusion surgery by PEEK rod systems for treatment of degenerative lumbar diseases with a 2-year follow-up. METHODS From February 2012 to October 2012, 38 patients who underwent non-fusion surgery using PEEK rod systems were incl...

Neurophysiological measurements of the vestibular function for diagnosis and follow-up evaluations provide an objective assessment, which, unfortunately, does not necessarily correlate with the patients' self-feeling. The literature provides many questionnaires to assess the outcome of rehabilitation programs for disequilibrium, but only for the Dizziness Handicap Inventory (DHI) is an Italian ...

The mission of the Green Visions Plan for 21st Century Southern California is to offer a guide to habitat conservation, watershed health and recreational open space for the Los Angeles metropolitan region. The Plan will also provide decision support tools to nurture a living green matrix for southern California. Our goals are to protect and restore natural areas, restore natural hydrological fu...

La eutrofización constituye uno de los problemas primordiales en calidad agua, especialmente cuerpos agua usados como fuentes abastecimiento potable. causa principal la radica el aporte nutrientes que desde las cuencas llegan al cuerpo receptor, aumentan su productividad y causan efectos negativos, floraciones algales tóxicas. En últimos años, aplicación modelos numéricos ha resultado una herra...

The separation models are tools used in solar engineering to estimate direct normal (DNI) and diffuse horizontal (DHI) irradiances from measurements of global irradiance (GHI). This paper proposes two empirical that stand out owing their simple mathematical formulation: a rational polynomial equation. Validation the new was carried against data 36 locations, covering four major climatic zones. ...