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Search Results: 1 - 10 of 22921 matches for " Jorge Ripalda "
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Outcome and Structural Integrity of Rotator Cuff after Arthroscopic Treatment of Large and Massive Tears with Double Row Technique: A 2-Year Followup
Ignacio Carbonel,Angel A. Martínez,Elisa Aldea,Jorge Ripalda
Advances in Orthopedics , 2013, DOI: 10.1155/2013/914148
Abstract:
Outcome and Structural Integrity of Rotator Cuff after Arthroscopic Treatment of Large and Massive Tears with Double Row Technique: A 2-Year Followup
Ignacio Carbonel,Angel A. Martínez,Elisa Aldea,Jorge Ripalda,Antonio Herrera
Advances in Orthopedics , 2013, DOI: 10.1155/2013/914148
Abstract: Purpose. The purpose of this study was to evaluate the functional outcome and the tendon healing after arthroscopic double row rotator cuff repair of large and massive rotator cuff tears. Methods. 82 patients with a full-thickness large and massive rotator cuff tear underwent arthroscopic repair with double row technique. Results were evaluated by use of the UCLA, ASES, and Constant questionnaires, the Shoulder Strength Index (SSI), and range of motion. Follow-up time was 2 years. Magnetic resonance imaging (MRI) studies were performed on each shoulder preoperatively and 2 years after repair. Results. 100% of the patients were followed up. UCLA, ASES, and Constant questionnaires showed significant improvement compared with preoperatively ( ). Range of motion and SSI in flexion, abduction, and internal and external rotation also showed significant improvement ( ). MRI studies showed 24 cases of tear after repair (29%). Only 8 cases were a full-thickness tear. Conclusions. At two years of followup, in large and massive rotator cuff tears, an arthroscopic double row rotator cuff repair technique produces an excellent functional outcome and structural integrity. 1. Introduction Maximizing tendon healing is the primary goal of rotator cuff repair surgery. Tendon healing has been shown to improve active motion, strength, and patient self-assessed function after rotator cuff repair [1, 2]. Whereas small and medium sized rotator cuff tears are successfully managed with any surgical repair in the vast majority of cases, the optimal management of big and massive rotator cuff tears has been controversial and continues to evolve. Tendon retraction, adhesions, and poor tissue quality common in these tears make repair one of the most technically complex procedures in the shoulder. Arthroscopic techniques and instrumentations are improving rapidly, and arthroscopic rotator cuff repair has gained popularity. Double row of anchors technique is reported to reestablish the normal rotator cuff footprint and increase the contact area for healing [3, 4] so anatomical and biomechanical are better than with the single row technique [4–8]. The purpose of this study was to evaluate the functional outcome and the tendon healing after arthroscopic double row rotator cuff repair of large and massive rotator cuff tears. 2. Materials and Methods 2.1. Patient Selection Patients were recruited among those referred by primary care doctors because of symptoms of rotator cuff tears and were enrolled in the study by the senior surgeons of the Shoulder and Elbow unit at the Miguel Servet
Time reversal and negative energies in general relativity
Jose M. Ripalda
Physics , 1999,
Abstract: The significance of past-pointing four-vectors and negative energies in general relativity is discussed. The sign of the energy is not absolute, but relative to the four-velocity of the observer, and every particle/observer always measures its own mass as positive. It is shown that the description of the interaction of past-pointing and future-pointing matter in general relativity requires two metric tensors for self-consistency. This aspect of general relativity might account for the observations that led to the proposal of "dark energy" and non-baryonic "dark matter".
The university with conditions La universidad con condiciones
José María Ripalda Crespo
Athenea Digital , 2013,
Abstract: The model of the national university is being substituted by that of the global university. At the same time, new dogmas that appear with economic labels are being imposed. All this is accompanied by important cultural changes. The Spanish university was one of the instances that was taken care of by the post-Francoist regime. Now, this regime feels strong against it, and on the other hand this university – as the whole of the productive structure – requires a reform. It is not expected that this reform will go in the direction of the university having more social presence, but rather more presence of companies. It is neither expected that it will imply more internal democracy, but more discipline. All resistance or alternative has to take into account the new situation and join the still dispersed forces that still have, however, a constitutive capacity. El modelo de universidad nacional está siendo sustituido por el de universidad global. A la vez se imponen nuevos dogmas bajo rótulos económicos, mientras se operan, al parecer espontáneamente, cambios culturales importantes. La universidad espa ola fue una de las instancias que el régimen post-franquista cuidó; ahora ese régimen se siente fuerte frente a ella y por otra parte esa universidad —como toda la estructura productiva— requiere una reforma. No está previsto que esa reforma vaya exactamente en el sentido de una mayor presencia social, sino empresarial, ni en el de una mayor democracia interna, sino de un mayor disciplinamiento. Toda resistencia o alternativa debe tener en cuenta la nueva situación y hacer frente común con fuerzas aún dispersas, pero de capacidad constituyente.
Linfangioma quístico retroperitoneal adherido a cabeza pancreática
RUIZ-TOVAR,JAIME; RIPALDA,EMILIO; MARTíN,TERESA; BENI,RAFAEL; NU?O,JAVIER;
Revista chilena de cirugía , 2010, DOI: 10.4067/S0718-40262010000200013
Abstract: cystic retroperitoneal lymphangioma is an unfrequent pathology. most cases are asymptomatic, and when symptomatic, they tend to present as abdominal pain and bowel obstruction secondary to compres-sion of the bowel loops. treatment of choice is surgical excisión. we present a case of cystic retroperitoneal lymphangioma with adhesions to the second portion of duodenum and head of the páncreas. once separated from the páncreas, it remained denudated. to avoid an eventual pancreatic fístula, tachosil? was placed as sealing method. postoperative course was uneventful.
Linfangioma quístico retroperitoneal adherido a cabeza pancreática Cystic retroperitoneal lymphangioma
JAIME RUIZ-TOVAR,EMILIO RIPALDA,TERESA MARTíN,RAFAEL BENI
Revista Chilena de Cirugía , 2010,
Abstract: El linfangioma quístico retroperitoneal es una patología de poca frecuencia. La mayoría de los casos son asintomáticos y cuando presentan síntomas, lo más frecuente es dolor abdominal u obstrucción intestinal por compresión de asas intestinales. Su tratamiento consiste en la extirpación completa de la lesión. Presentamos un caso de linfangioma quístico retroperitoneal adherido a 2a porción duodenal y cabeza pancreática. Al separarlo del tejido pancreático, quedó un borde cruento. Para evitar una fístula pancreática, se colocó una placa de Tachosil a modo de sellante. No aparecieron complicaciones postoperatorias. Cystic retroperitoneal lymphangioma is an unfrequent pathology. Most cases are asymptomatic, and when symptomatic, they tend to present as abdominal pain and bowel obstruction secondary to compres-sion of the bowel loops. Treatment of choice is surgical excisión. We present a case of cystic retroperitoneal lymphangioma with adhesions to the second portion of duodenum and head of the páncreas. Once separated from the páncreas, it remained denudated. To avoid an eventual pancreatic fístula, Tachosil was placed as sealing method. Postoperative course was uneventful.
C60 fullereno modificado por haces de iones de baja energía para prevenir el efecto multipactor
Montero, I.,Román, E.,Ripalda, J. M.,Galán, L.
Boletín de la Sociedad Espa?ola de Cerámica y Vidrio , 2005,
Abstract: C60 fullerene modified by low-energy ion beams of H2 +, N2 +, O2 + y Ar+ has been studied. After ion bombardment, the photoemission spectra obtained using synchrotron radiation show an increase of the density of states just bellow the Fermi level. Ion bombarment of C60 with 50 eV energy and 4×1014 ion/cm2 fluence is sufficient to modify the cage structure of the fullerene and to obtain graphitic amorphous carbon. Upon bombarding with an energy of 50 eV, implantation of the nitrogen and the oxygen ions was observed, while implantation of the hydrogen and argon ions was small. The maximum secondary emission yield of C60 thin films is lower than 1.3 even after air exposure. A significant improvement on the secondary emission properties can be obtained after bombardment by low-energy Ar+ and N2 + ion beams. Se ha estudiado la interacción de los iones H2 +, N2 +, O2 + y Ar+ de baja energía con películas delgadas de fullereno C60. Después del bombardeo iónico, la densidad de estados cerca del nivel de Fermi aumenta de forma apreciable, según se observa en los espectros de fotoemisión obtenidos usando radiación sincrotrón. El bombardeo iónico con una energía de tan sólo 50 eV y una fluencia de 4x1014 ion/cm2 es suficiente para modificar la simétrica estructura de caja del fullereno y obtener carbono amorfo grafítico. El nitrógeno y el oxígeno se implantan al bombardear con una energía de 50 eV, mientras que la implantación es despreciable en el caso del hidrógeno y argon. Las películas de fullereno poseen un coeficiente máximo de emisión secundaria inferior a 1.3 incluso después de su exposición al aire, el cual disminuye después del bombardeo con iones de N2 + y Ar+.
A Graph-Theoretical Approach to Calculate Vibrational Energies of Atomic and Subatomic Systems  [PDF]
Jorge Galvez
Open Journal of Physical Chemistry (OJPC) , 2012, DOI: 10.4236/ojpc.2012.24028
Abstract: One of the challenges still pending in string theory and other particle physics related fields is the accurate prediction of the masses of the elementary particles defined in the standard model. In this paper an original algorithm to assign graphs to each of these particles is proposed. Based on this mapping, we demonstrate that certain indices associated with the topology of the graph (graph theoretical indices) are very effective in predicting the masses of the particles. Specifically, the spectral moments of the graph adjacency matrix weighted by edge degrees play a key role in the excellent correlations found. Moreover, the same topological pattern is found in other well known quantum systems such as the particle in a box and the vibrational frequencies of diatomic molecules, such as hydrogen. The results shown here open a suggestive pathway for the use of graph-theoretical approaches in predicting properties of elementary particles and other physical systems, which seem to match similar topological patterns.
Environmental Impact Assessment of the Application of Pyrogenic Carbon in Soil  [PDF]
Jorge Laine
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410137
Abstract:

World increasing population and use of energy for transportation and electricity are demanding more extensive and more efficient use of land for agriculture; aiming to both food and biofuel supplies. This communication assesses the possible improvements in soil fertility, capture of greenhouse gas, and rainfall, as a result of the large scale terrestrial application of pyrogenic carbon aiming for desert greening. Fossil hydrocarbon coke is taken into account for this proposal because of the exhaustion of light petroleum proven reserves that is leading to a scenario of abundant coke production from the processing of non-conventional reserves.

Development of a “Space-Saving Model” for a One-Family Dwelling Case Study of Japanese Architecture with Space Limitations  [PDF]
Jorge Romero
Journal of Building Construction and Planning Research (JBCPR) , 2015, DOI: 10.4236/jbcpr.2015.34020
Abstract: The rapid globalization of building standards and codes in regards of contemporary housing and the growth of populations during this century demands an immediate response from designers in terms of space rationalizing to fulfill the forthcoming lack of architectural habitat on earth. The differences in culture imply a difference in the way of living, and the way of living indicates a contrast in the way of designing houses. A western house does not need an extra room covered with tatami mats for relaxation as a modern Japanese home would most likely do, as a separate living-like space. Organizations, among others, like CABO (Council of American Building Officials) and, in our specific case study, BCJ (Building Center of Japan) together with BRI (Building Research Institute) try to overcome these differences to provide better housing conditions to the world through the formulation of global designing and building standards. International publications like UBC (Uniform Building Code), IBC (International Building Code), OTFDC (One and Two Family Dwelling Code) and BSLJ (Building Standard Law of Japan) have also played an important role to globalize safety and design codes to better understand global housing under normal conditions. However, space limitations and concentration of human masses in mega cities result in a crucial new consideration: the urgent need of investigating the possibilities of rationally living within less space. Minimums provided by most codes do not take into account the space issue and overpopulation of large cities. Providing with some design recommendations for one-family dwellings has been the departure point and main motivation to carry out this case study based on actual buildings with the lack of space conditioning in a country where these conditions turn into reality.
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