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PublicationCooper-pair size and binding energy for unconventional superconducting systems(Elsevier B.V., 2018-06-15)The main proposal of this paper is to analyze the size of the Cooper pairs composed by unbalanced mass fermions from different electronic bands along the BCS–BEC crossover and study the binding energy of the pairs. We are considering an interaction between fermions with different masses leading to an inter-band pairing. In addiction to the attractive interaction we have an hybridization term to couple both bands, which in general acts unfavorable for the pairing between the electrons. We get first order phase transitions as the hybridization breaks the Cooper pairs for the s-wave symmetry of the gap amplitude. The results show the dependence of the Cooper-pair size as a function of the hybridization for T=0. We also propose the structure of the binding energy of the inter-band system as a function of the two-bands quasi-particle energies.
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PublicationCoping strategies predict disability in patients with primary fibromyalgia( 1996-11-01)We administered the Coping Strategies Questionnaire (CSQ) to 80 patients with fibromyalgia (FM) to determine the relationship between coping strategies and functional disability. A principal components factor analysis revealed two dimensions of patients' CSQ responses: Coping Attempts and Catastrophizing. Coping Attempts consists of five scales: Reinterpreting Pain, Ignoring Pain Sensations, Diverting Attention, Coping Self-Statements and Increasing Activity Level. Catastrophizing is comprised solely of the CSQ Catastrophizing scale. Both coping strategy dimensions were significantly related to patients' disability scores on the Sickness Impact Profile even after controlling for demographic and clinical variables as well as neuroticism. Coping Attempts was associated with higher levels of Physical (P < 0.05) and Total Disability (P < 0.01), and lower levels of Psychosocial Disability (P < 0.05). Catastrophizing was associated with higher levels of Total Disability (P < 0.01). These relationships suggest that investigators should attempt to identify Coping Attempts strategies that best reduce patients' psychological distress in the laboratory. It then may be possible to teach patients to use these strategies to reduce distress in their home and work environments.
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PublicationCoordinated Optimal Volt/Var Control for Distribution Networks via D-PMUs and EV Chargers by Exploiting the Eigensystem Realization(Institute of Electrical and Electronics Engineers Inc., 2021-05-01)This article proposes a novel optimal hybrid control framework to improve the voltage profile of highly unbalanced Distribution Grids (DGs) by coordinating the injection of reactive power from multiple off-board Electrical Vehicles (EVs) chargers. It exploits the time-synchronized measurements advantages, centralized control, and local controllers embedded into a hierarchical and scalable scheme, coordinated by the distribution system operator (DSO). The proposed framework is aimed to increase the modern electrical networks' flexibility, reliability, and stability. It is powered by the Eigensystem Realization (ER)-based system identification technique, a Linear Quadratic Gaussian (LQG) controller, the Distribution-level Phasor Measurement Units (D-PMUs), and a new aggregator agent that handles the EV chargers power injection to precisely and timely regulate the dynamic voltage response in a sub-area or the entire DG. The robustness and feasibility of the proposal are demonstrated by employing simulated scenarios with unbalanced faults, latency in communications, and highly unbalanced loads conditions on the IEEE 13 and 123 nodes test feeders, compensating the voltage variations accurately in less than 205 ms. The promising outcome of this study suggests a novel application for an emerging measurement-based control system in the operation of modern active DGs.
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PublicationCoordinated regulation of Arabidopsis thaliana development by light and gibberellins(Nature Publishing Group, 2008-01-24)Light and gibberellins (GAs) mediate many essential and partially overlapping plant developmental processes. DELLA proteins are GA-signalling repressors that block GA-induced development. GA induces degradation of DELLA proteins via the ubiquitin/proteasome pathway, but light promotes accumulation of DELLA proteins by reducing GA levels. It was proposed that DELLA proteins restrain plant growth largely through their effect on gene expression. However, the precise mechanism of their function in coordinating GA signalling and gene expression remains unknown. Here we characterize a nuclear protein interaction cascade mediating transduction of GA signals to the activity regulation of a light-responsive transcription factor. In the absence of GA, nuclear-localized DELLA proteins accumulate to higher levels, interact with phytochrome- interacting factor 3 (PIF3, a bHLH-type transcription factor) and prevent PIF3 from binding to its target gene promoters and regulating gene expression, and therefore abrogate PIF3-mediated light control of hypocotyl elongation. In the presence of GA, GID1 proteins (GA receptors) elevate their direct interaction with DELLA proteins in the nucleus, trigger DELLA protein's ubiquitination and proteasome-mediated degradation, and thus release PIF3 from the negative effect of DELLA proteins. ©2008 Nature Publishing Group.
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PublicationCoronectomy - An alternative approach to remove impacted teeth in oncological patients(Medicina Oral S.L., 2018-10-01)Background: Coronectomy involves the section of the tooth crown leaving the roots in the socket. Possibility of inferior alveolar nerve injury and mandibular fracture are the main indications for this approach. Herein, we describe a case series of coronectomy to highlight its indication in normal and oncological patients. Material and Methods: A total of 9 patients were submitted to coronectomy, 6 of them were oncological. Three patients were evaluated before head and neck radiotherapy (HNRT), 2 after HNRT and 1 before bone marrow transplantation. Results: Mean age of the patients was 49 years, most of them male (n=7). Lower third molars were the main teeth that received this procedure, and all cases presented intimate anatomic relationship between the roots and the mandibular canal. Moreover, three cases also presented evident mandibular fracture risk in removing the tooth. During the follow-up period, none complications were observed related to coronectomy and oncological treatment. Conclusion: Coronectomy is a safe approach including for cancer patients and it should be considered in high-risk impacted teeth extractions.