Arthroscopy: The Journal of Arthroscopic & Related Surgery, 2014
The purpose of this study was to evaluate the clinical and sequential imaging follow-up results a... more The purpose of this study was to evaluate the clinical and sequential imaging follow-up results at a mean of 36 months after an arthroscopic technique for implantation of matrix-encapsulated autologous chondrocytes for the treatment of articular cartilage lesions on the femoral condyles. Ten patients underwent arthroscopic implantation of autologous chondrocytes seeded onto a bioabsorbable scaffold. The patients were evaluated clinically using a visual analog scale (VAS) for pain and International Knee Documentation Committee (IKDC), Lysholm, and Tegner scores. Magnetic resonance imaging (MRI) T2-mapping and magnetic resonance observation of cartilage repair tissue (MOCART) evaluations were also performed. Second-look arthroscopic evaluation using the International Cartilage Repair Society (ICRS) grading classification was performed at 12 months. Compared with their preoperative values, at 36 months mean values ± standard deviation for the VAS scale for pain were 6.0 ± 1.5 to 0.3 ± 0.4. Improvement in clinical scores between preoperative values and 36-month follow-up values in subjective IKDC scores was 46.9 ± 18.5 to 77.2 ± 12.8; in Lysholm scores, it was 51.8 ± 25.1 to 87.9 ± 6.5, and in the Tegner activity scale it was 2.9 ± 1.7 to 5.9 ± 1.9. Mean T2 mapping and MOCART scores improved over time to 38.1 ± 4.4 ms and 72.5 ± 10, respectively. Mean ICRS score by second-look arthroscopy at 1 year was 10.4 ± 0.1. All clinical scores improved over time compared with the preoperative values. Clinical results are comparable with MRI T2 mapping and ICRS evaluations, suggesting that this arthroscopic technique for cell-based cartilage repair is efficacious and reproducible at a mean of 36 months of follow-up. Level IV, therapeutic case series.
Synonyms Collapse criterion; Collapse variability; Component deterioration; Nonlinear dynamic ana... more Synonyms Collapse criterion; Collapse variability; Component deterioration; Nonlinear dynamic analysis; P-delta effect; Structural modeling strategies *Influence of collapse definition and near-field effects on collapse capacity spectra. J Earthq Eng 17:859-878 Jalayer F, Cornell CA (2009) Alternative non-linear demand estimation methods for probability-based seismic assessments. Earthq Eng Struct Dyn 38:951-972 Jennings PC, Husid R (1968) Collapse of yielding structures during earthquakes. J Eng Mech Div Proc ASCE 94:1045-1065 Krawinkler H, Zareian F, Lignos DG, Ibarra LF (2009) Prediction of collapse of structures under earthquake excitations. In: Papadrakakis M, Lagaros ND, Fragiadakis M (eds) Proceedings of the 2nd international conference on computational methods in structural dynamics and earthquake engineering (COMPDYN 2009), Rhodes, 22-24 June 2009, CD-ROM paper, paper no. CD449 Kunnath SK, Reinhorn AM, Park YJ (1990) Analytical modeling of inelastic response of R/C structures. J Struct Eng ASCE 116:996-1027 Liel AB, Deierlein GG (2013) Cost-benefit evaluation of seismic mitigation alternatives for older reinforced concrete frame buildings. Earthq Spectra 29:1392-1411 Liel AB, Haselton CB, Deierlein GG, Baker JW (2009) Incorporating modeling uncertainties in the assessment of seismic collapse risk of buildings. Struct Saf 31:197-211 Lignos DG, Krawinkler H (2012) Sidesway collapse of deteriorating structural systems under seismic excitations. Report no. TR
This paper presents the description, calibration and application of relatively simple hysteretic ... more This paper presents the description, calibration and application of relatively simple hysteretic models that include strength and sti ness deterioration properties, features that are critical for demand predictions as a structural system approaches collapse. Three of the basic hysteretic models used in seismic demand evaluation are modiÿed to include deterioration properties: bilinear, peak-oriented, and pinching. The modiÿed models include most of the sources of deterioration: i.e. various modes of cyclic deterioration and softening of the post-yielding sti ness, and also account for a residual strength after deterioration. The models incorporate an energy-based deterioration parameter that controls four cyclic deterioration modes: basic strength, post-capping strength, unloading sti ness, and accelerated reloading sti ness deterioration. Calibration of the hysteretic models on steel, plywood, and reinforced-concrete components demonstrates that the proposed models are capable of simulating the main characteristics that in uence deterioration. An application of a peak-oriented deterioration model in the seismic evaluation of single-degree-of-freedom (SDOF) systems is illustrated. The advantages of using deteriorating hysteretic models for obtaining the response of highly inelastic systems are discussed. approaches collapse. In earthquake engineering, collapse implies that the structural system is no longer capable to maintain its gravity load-carrying capacity in the presence of seismic e ects, which can be caused by main shocks and/or aftershocks. Local collapse may occur, for instance, if a vertical load-carrying component fails in compression or if shear transfer is lost between horizontal and vertical components (e.g. shear failure between a at slab and a column). Global collapse occurs if a local failure propagates (progressive collapse) or if an individual storey displaces su ciently so that the second order P− e ects fully o set the ÿrst order storey shear resistance. Collapse assessment requires hysteretic models capable of representing all the important modes of deterioration that are observed in experimental studies.
The variance of collapse capacity is an important constituent of probabilistic methodologies used... more The variance of collapse capacity is an important constituent of probabilistic methodologies used to evaluate the probability of collapse of structures subjected to earthquake ground motions. This study evaluates the effect of ground motion randomness (ie record-to-record ...
... Empieza por deli-. mitar el marco analítico, luego caracteriza a la institución clásica, reco... more ... Empieza por deli-. mitar el marco analítico, luego caracteriza a la institución clásica, recorre las mo-. dificaciones introducidas por la izquierda y ... del año 2006 incluyó a 440 mil trabajadores de la actividad privada ur-. bana, 150 mil funcionarios públicos y 80 mil asalariados ...
This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 w... more This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 was undermined by lack of credibility. It provides an empirical counterpart to some of the credibility issues that have been discussed elsewhere in the literature and proposes a methodology, based on the estimation of a probit model, to measure the probability of ~rade policy reversal due to the likelihood of occurrence of a balance of payments crisis. It is shown that the probability of trade policy reversal reduced indeed the rate of capital accumulation during the first years of the reform.
This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 w... more This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 was undermined by lack of credibility. It provides an empirical counterpart to some of the credibility issues that have been discussed elsewhere in the literature and proposes a methodology, based on the estimation of a probit model, to measure the probability of trade policy reversal due to the likelihood of occurrence of a balance of payments crisis. It is shown that the probability of trade policy reversal reduced indeed the rate of capital accumulation during the first years of the reform.
Material de lectura obligatorio correspondiente a los Trabajos Prácticos 1 a 7. INTRODUCCIÓN De a... more Material de lectura obligatorio correspondiente a los Trabajos Prácticos 1 a 7. INTRODUCCIÓN De acuerdo con la O.M.S. puede definirse a la Valoración del Estado Nutricional (V.E.N.) como la interpretación de la información obtenida de estudios bioquímicos, antropométricos y/o clínicos que se utilizan para determinar la situación nutricional de individuos o poblaciones. En el ámbito clínico permite seleccionar aquellos individuos que necesitan de una intervención dietoterápica.
Arthroscopy: The Journal of Arthroscopic & Related Surgery, 2014
The purpose of this study was to evaluate the clinical and sequential imaging follow-up results a... more The purpose of this study was to evaluate the clinical and sequential imaging follow-up results at a mean of 36 months after an arthroscopic technique for implantation of matrix-encapsulated autologous chondrocytes for the treatment of articular cartilage lesions on the femoral condyles. Ten patients underwent arthroscopic implantation of autologous chondrocytes seeded onto a bioabsorbable scaffold. The patients were evaluated clinically using a visual analog scale (VAS) for pain and International Knee Documentation Committee (IKDC), Lysholm, and Tegner scores. Magnetic resonance imaging (MRI) T2-mapping and magnetic resonance observation of cartilage repair tissue (MOCART) evaluations were also performed. Second-look arthroscopic evaluation using the International Cartilage Repair Society (ICRS) grading classification was performed at 12 months. Compared with their preoperative values, at 36 months mean values ± standard deviation for the VAS scale for pain were 6.0 ± 1.5 to 0.3 ± 0.4. Improvement in clinical scores between preoperative values and 36-month follow-up values in subjective IKDC scores was 46.9 ± 18.5 to 77.2 ± 12.8; in Lysholm scores, it was 51.8 ± 25.1 to 87.9 ± 6.5, and in the Tegner activity scale it was 2.9 ± 1.7 to 5.9 ± 1.9. Mean T2 mapping and MOCART scores improved over time to 38.1 ± 4.4 ms and 72.5 ± 10, respectively. Mean ICRS score by second-look arthroscopy at 1 year was 10.4 ± 0.1. All clinical scores improved over time compared with the preoperative values. Clinical results are comparable with MRI T2 mapping and ICRS evaluations, suggesting that this arthroscopic technique for cell-based cartilage repair is efficacious and reproducible at a mean of 36 months of follow-up. Level IV, therapeutic case series.
Synonyms Collapse criterion; Collapse variability; Component deterioration; Nonlinear dynamic ana... more Synonyms Collapse criterion; Collapse variability; Component deterioration; Nonlinear dynamic analysis; P-delta effect; Structural modeling strategies *Influence of collapse definition and near-field effects on collapse capacity spectra. J Earthq Eng 17:859-878 Jalayer F, Cornell CA (2009) Alternative non-linear demand estimation methods for probability-based seismic assessments. Earthq Eng Struct Dyn 38:951-972 Jennings PC, Husid R (1968) Collapse of yielding structures during earthquakes. J Eng Mech Div Proc ASCE 94:1045-1065 Krawinkler H, Zareian F, Lignos DG, Ibarra LF (2009) Prediction of collapse of structures under earthquake excitations. In: Papadrakakis M, Lagaros ND, Fragiadakis M (eds) Proceedings of the 2nd international conference on computational methods in structural dynamics and earthquake engineering (COMPDYN 2009), Rhodes, 22-24 June 2009, CD-ROM paper, paper no. CD449 Kunnath SK, Reinhorn AM, Park YJ (1990) Analytical modeling of inelastic response of R/C structures. J Struct Eng ASCE 116:996-1027 Liel AB, Deierlein GG (2013) Cost-benefit evaluation of seismic mitigation alternatives for older reinforced concrete frame buildings. Earthq Spectra 29:1392-1411 Liel AB, Haselton CB, Deierlein GG, Baker JW (2009) Incorporating modeling uncertainties in the assessment of seismic collapse risk of buildings. Struct Saf 31:197-211 Lignos DG, Krawinkler H (2012) Sidesway collapse of deteriorating structural systems under seismic excitations. Report no. TR
This paper presents the description, calibration and application of relatively simple hysteretic ... more This paper presents the description, calibration and application of relatively simple hysteretic models that include strength and sti ness deterioration properties, features that are critical for demand predictions as a structural system approaches collapse. Three of the basic hysteretic models used in seismic demand evaluation are modiÿed to include deterioration properties: bilinear, peak-oriented, and pinching. The modiÿed models include most of the sources of deterioration: i.e. various modes of cyclic deterioration and softening of the post-yielding sti ness, and also account for a residual strength after deterioration. The models incorporate an energy-based deterioration parameter that controls four cyclic deterioration modes: basic strength, post-capping strength, unloading sti ness, and accelerated reloading sti ness deterioration. Calibration of the hysteretic models on steel, plywood, and reinforced-concrete components demonstrates that the proposed models are capable of simulating the main characteristics that in uence deterioration. An application of a peak-oriented deterioration model in the seismic evaluation of single-degree-of-freedom (SDOF) systems is illustrated. The advantages of using deteriorating hysteretic models for obtaining the response of highly inelastic systems are discussed. approaches collapse. In earthquake engineering, collapse implies that the structural system is no longer capable to maintain its gravity load-carrying capacity in the presence of seismic e ects, which can be caused by main shocks and/or aftershocks. Local collapse may occur, for instance, if a vertical load-carrying component fails in compression or if shear transfer is lost between horizontal and vertical components (e.g. shear failure between a at slab and a column). Global collapse occurs if a local failure propagates (progressive collapse) or if an individual storey displaces su ciently so that the second order P− e ects fully o set the ÿrst order storey shear resistance. Collapse assessment requires hysteretic models capable of representing all the important modes of deterioration that are observed in experimental studies.
The variance of collapse capacity is an important constituent of probabilistic methodologies used... more The variance of collapse capacity is an important constituent of probabilistic methodologies used to evaluate the probability of collapse of structures subjected to earthquake ground motions. This study evaluates the effect of ground motion randomness (ie record-to-record ...
... Empieza por deli-. mitar el marco analítico, luego caracteriza a la institución clásica, reco... more ... Empieza por deli-. mitar el marco analítico, luego caracteriza a la institución clásica, recorre las mo-. dificaciones introducidas por la izquierda y ... del año 2006 incluyó a 440 mil trabajadores de la actividad privada ur-. bana, 150 mil funcionarios públicos y 80 mil asalariados ...
This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 w... more This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 was undermined by lack of credibility. It provides an empirical counterpart to some of the credibility issues that have been discussed elsewhere in the literature and proposes a methodology, based on the estimation of a probit model, to measure the probability of ~rade policy reversal due to the likelihood of occurrence of a balance of payments crisis. It is shown that the probability of trade policy reversal reduced indeed the rate of capital accumulation during the first years of the reform.
This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 w... more This paper assesses whether the program of trade liberalization undertaken by Mexico after 1985 was undermined by lack of credibility. It provides an empirical counterpart to some of the credibility issues that have been discussed elsewhere in the literature and proposes a methodology, based on the estimation of a probit model, to measure the probability of trade policy reversal due to the likelihood of occurrence of a balance of payments crisis. It is shown that the probability of trade policy reversal reduced indeed the rate of capital accumulation during the first years of the reform.
Material de lectura obligatorio correspondiente a los Trabajos Prácticos 1 a 7. INTRODUCCIÓN De a... more Material de lectura obligatorio correspondiente a los Trabajos Prácticos 1 a 7. INTRODUCCIÓN De acuerdo con la O.M.S. puede definirse a la Valoración del Estado Nutricional (V.E.N.) como la interpretación de la información obtenida de estudios bioquímicos, antropométricos y/o clínicos que se utilizan para determinar la situación nutricional de individuos o poblaciones. En el ámbito clínico permite seleccionar aquellos individuos que necesitan de una intervención dietoterápica.
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