Search results for "Median"
showing 10 items of 337 documents
Impulse noise removal on an embedded, low memory SIMD processor
2003
Vector median filters efficiently reduce noise while preserving image details. However, their high computational complexity for color images makes them impractical for real-time systems. We propose new computationally efficient filtering algorithms, called index mapping filters (IMF). These filtering algorithms are accelerated by implementing them on a massively data parallel processor array. In addition to greater computational efficiency, these algorithms result in robust noise reduction of corrupted color images. Analyses of mean square error, signal-to-noise-ratio, and visual comparison metrics indicate that IMF are competitive with the vector median filter (VMF) in their ability to cor…
Biproportional methods of structural change analysis: A typological survey
2004
International audience; Analysts often are interested in learning how much an exchange system has changed over time or how two different exchange systems differ. Identifying structural difference in exchange matrices can be performed using either 'directed' or 'undirected' methods. Directed methods are based on the computation and comparison of column- or row-normalizations of the matrices. The choice of row or column for the normalization implies a specific direction of the exchanges, so that the column-wise normalized results should not be compared to the row-wise normalized results. In this category fall the simple comparison of coefficient matrices and the causative method. Undirected m…
Cryotherapy for liver tumors: current status, perspectives, clinical results, and review of literature.
2004
Cryotherapy has gained importance as a locally ablative treatment option for patients with non-resectable liver tumors, especially metastases from colorectal cancer. We have used this technique since 1996 for the treatment of 77 patients with malignant liver tumors. Patient data was prospectively recorded and follow-up was until September 2002 or death. Fifty-five patients had colorectal cancer liver metastases, 16 metastases from other primaries and 6 had hepatoma. Forty patients had cryotherapy only and 37 had an additional liver resection. Morbidity and mortality were 22% and 1.3%, respectively. In 68% of patients with colorectal liver metastases and an elevated serum carcinoembryonic a…
Residual neurotoxicity in ovarian cancer patients in clinical remission after first-line chemotherapy with carboplatin and paclitaxel: the Multicente…
2006
Abstract Background Carboplatin/paclitaxel is the chemotherapy of choice for advanced ovarian cancer, both in first line and in platinum-sensitive recurrence. Although a significant proportion of patients have some neurotoxicity during treatment, the long-term outcome of chemotherapy-induced neuropathy has been scantly studied. We retrospectively assessed the prevalence of residual neuropathy in a cohort of patients in clinical remission after first-line carboplatin/paclitaxel for advanced ovarian cancer. Methods 120 patients have been included in this study (101 participating in a multicentre phase III trial evaluating the efficacy of consolidation treatment with topotecan, and 19 treated …
Identification of Candidate Polymorphisms on Stress Oxidative and DNA Damage Repair Genes Related with Clinical Outcome in Breast Cancer Patients
2012
Diverse polymorphisms have been associated with the predisposition to develop cancer. On fewer occasions, they have been related to the evolution of the disease and to different responses to treatment. Previous studies of our group have associated polymorphisms on genes related to oxidative stress (rs3736729 on GCLC and rs207454 on XDH) and DNA damage repair (rs1052133 on OGG1) with a predisposition to develop breast cancer. In the present work, we have evaluated the hypothesis that these polymorphisms also play a role in a patient’s survival. A population-based cohort study of 470 women diagnosed with primary breast cancer and a median follow up of 52.44 months was conducted to e…
Impact of Pre-Transplant Ruxolitinib in Myelofibrosis Patients on Outcome after Allogeneic Stem Cell Transplantation
2016
Abstract Introduction Ruxolitinib is the first approved drug for treatment of myelofibrosis. Major effects are reduction in spleen size and improvement of constitutional symptoms. Because spleen size and constitutional symptoms may influence outcome after allogeneic stem cell transplantation (ASCT), ruxolitinib is recommended before stem cell transplantation in order to reduce therapy-related morbidity and mortality and improve outcome (EBMT/ELN recommendation, Leukemia 2015) The aim of this retrospective study was to evaluate the impact of pretreatment with ruxolitinib in comparison to transplantation of ruxolitinib-naïve MF patients with regard to outcome after ASCT. Patients and methods …
Efficacy of Rituximab Combined in Salvage- and High Dose-Therapy (HDT) for Patients with Relapsed NHL; Interim Analysis of a Multicenter Phase II Stu…
2004
Abstract The introduction of Rituximab (R) in the treatment of B-NHL resulted in improvement in first line therapies for indolent (ind.) and aggressive (agg.) B-NHL. However, the value of R in intensive chemotherapy relapse strategies has not definitely been demonstrated. In a phase I/II clinical trial we have demonstrated safety of R as an in vivo purging agens in salvage and high dose therapy for relapsed/refractory B-NHL. This led, with promising response rates, to the initiation of a multicenter phase II trial to further prove therapeutic efficacy. Inclusion criteria were: Pt < 65 years, ECOG < 3, relapse or progression for patients with ind. NHL and induction failure or relapse f…
Outcome of patients with CML treated with dasatinib or nilotinib after failure of second prior TKIs.
2010
Abstract Abstract 2294 Background. The TKIs Nilotinib and Dasatinib offer additional therapeutic options for patients with CML who are resistant or intolerant to Imatinib. These agents, active against the majority of Imatinib resistant BCR-ABL mutated clones, have a different pattern of kinase target selectivity, pharmacokinetics parameters, cell uptake, efflux properties and adverse events profiles. Preliminary results suggest that some patients may respond to a second TKI used as third line therapy, but little is known about the long term benefit of such an approach.Aim of this collaborative Italian study was to verify the response (rate and duration) and the clinical outcome in patients …
EMPRESA FAMILIAR, EQUIPOS DIRECTIVOS, DIVERSIDAD Y AMBIDIESTRÍA EN LAS PYMES
2015
RESUMEN El objetivo de este trabajo es analizar el papel del carácter familiar en la ambidiestría de las pequeñas y medianas empresas (PyMEs). Proponemos que las capacidades asociadas al carácter familiar de la empresa y a las características demográficas de sus élites directivas, específicamente su diversidad, afectan a los procesos de toma de decisiones. Dichas características facilitan la percepción de los cambios en el entorno y la respuesta ante ellos con alternativas que, implicando conflictos o tensiones, permiten aprovechar dichos cambios y, además, promueven la habilidad de reconfigurar los recursos para conseguirlo. En una muestra de 132 PyMEs demostramos que la ambidiestría se ve…
El préstamo participativo, ¿tiene el mismo impacto que el capital riesgo en el crecimiento de la pequeña y mediana empresa?
2014
ResumenEl préstamo participativo y el capital riesgo tienen distinta naturaleza, pues mientras el primero es un recurso ajeno, el capital riesgo es un fondo propio. Sin embargo, los profesionales de ambos sectores no encuentran, desde una perspectiva cualitativa, diferencias entre estos instrumentos.Con el objetivo de sustentar cuantitativamente esta percepción, el presente trabajo aborda el análisis estadístico comparativo del efecto que cada uno de estos recursos tiene en 11 variables representativas del crecimiento empresarial, de modo que podamos determinar las posibles analogías entre el impacto que ejercen el préstamo participativo y el capital riesgo sobre el crecimiento de la pequeñ…