A Grid Connected Photovoltaic Inverter with Battery-Supercapacitor Hybrid Energy Storage.

The power generation from renewable power sources is variable in nature, and may contain unacceptable fluctuations, which can be alleviated by using energy storage systems. However, the cost of batteries and their limited lifetime are serious disadvantages. To solve these problems, an improvement consisting in the collaborative association of batteries and supercapacitors has been studied. Nevertheless, these studies don't address in detail the case of residential and large-scale photovoltaic systems. In this paper, a selected combined topology and a new control scheme are proposed to control the power sharing between batteries and supercapacitors. Also, a method for sizing the energy storage system together with the hybrid distribution based on the photovoltaic power curves is introduced. This innovative contribution not only reduces the stress levels on the battery, and hence increases its life span, but also provides constant power injection to the grid during a defined time interval. The proposed scheme is validated through detailed simulation and experimental tests.

A Smart Power Electronic Multiconverter for the Residential Sector.

The future of the grid includes distributed generation and smart grid technologies. Demand Side Management (DSM) systems will also be essential to achieve a high level of reliability and robustness in power systems. To do that, expanding the Advanced Metering Infrastructure (AMI) and Energy Management Systems (EMS) are necessary. The trend direction is towards the creation of energy resource hubs, such as the smart community concept. This paper presents a smart multiconverter system for residential/housing sector with a Hybrid Energy Storage System (HESS) consisting of supercapacitor and battery, and with local photovoltaic (PV) energy source integration. The device works as a distributed energy unit located in each house of the community, receiving active power set-points provided by a smart community EMS. This central EMS is responsible for managing the active energy flows between the electricity grid, renewable energy sources, storage equipment and loads existing in the community. The proposed multiconverter is responsible for complying with the reference active power set-points with proper power quality; guaranteeing that the local PV modules operate with a Maximum Power Point Tracking (MPPT) algorithm; and extending the lifetime of the battery thanks to a cooperative operation of the HESS. A simulation model has been developed in order to show the detailed operation of the system. Finally, a prototype of the multiconverter platform has been implemented and some experimental tests have been carried out to validate it.

Hall-effect based semi-fast AC on-board charging equipment for electric vehicles.

The expected increase in the penetration of electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) will produce unbalanced conditions, reactive power consumption and current harmonics drawn by the battery charging equipment, causing a great impact on the power quality of the future smart grid. A single-phase semi-fast electric vehicle battery charger is proposed in this paper. This ac on-board charging equipment can operate in grid-to-vehicle (G2V) mode, and also in vehicle-to-grid (V2G) mode, transferring the battery energy to the grid when the vehicle is parked. The charger is controlled with a Perfect Harmonic Cancellation (PHC) strategy, contributing to improve the grid power quality, since the current demanded or injected has no harmonic content and a high power factor. Hall-effect current and voltage transducers have been used in the sensor stage to carry out this control strategy. Experimental results with a laboratory prototype are presented.

Early intervention during imatinib therapy in patients with newly diagnosed chronic-phase chronic myeloid leukemia: a study of the Spanish PETHEMA group.

BACKGROUND: Despite the favorable results of imatinib front line in chronic-phase chronic myeloid leukemia there is room for improvement. DESIGN AND METHODS: Early intervention during imatinib therapy was undertaken in 210 adults with chronic-phase chronic myeloid leukemia less than three months from diagnosis (Sokal high risk: 16%). Patients received imatinib 400 mg/day. At three months, dose was increased if complete hematologic response was not achieved. At six months, patients in complete cytogenetic response were kept on 400 mg and the remainder randomized to higher imatinib dose or 400 mg plus interferon-alfa. At 18 months, randomized patients were switched to a 2(nd) generation tyrosine kinase inhibitor if not in complete cytogenetic response and imatinib dose increased in non-randomized patients not in major molecular response. RESULTS: Seventy-two percent of patients started imatinib within one month from diagnosis. Median follow-up is 50.5 (range: 1.2-78) months. At three months 4 patients did not have complete hematologic response; at six months 73.8% were in complete cytogenetic response; among the remainder, 9 could not be randomized (toxicity or consent withdrawal), 17 were assigned to high imatinib dose, and 15 to 400 mg + interferon-alpha. The low number of randomized patients precluded comparison between the two arms. Cumulative response at three years was: complete hematologic response 98.6%, complete cytogenetic response 90% and major molecular response 82%. On an intention-to-treat basis, complete cytogenetic response was 78.8% at 18 months. At five years, survival was 97.5%, survival free from accelerated/blastic phase 94.3%, failure free survival 82.5%, and event free survival (including permanent imatinib discontinuation) 71.5%. CONCLUSIONS: These results indicate the benefit of early intervention during imatinib therapy (ClinicalTrials.gov Identifier: NCT00390897).

Impact of removing sinks from an intensive care unit on isolations by gram-negative non-fermenting bacilli in patients with invasive mechanical ventilation. / Impacto de la retirada de los lavabos en una unidad de cuidados intensivos sobre los aislamientos por bacilos gramnegativos no fermentadores en pacientes con ventilación mecánica invasiva.

INTRODUCTION AND OBJECTIVE: Contamination of sinks, even due to their underuse, is associated with the transmission of non-fermenting gram-negative bacilli (NFGNB) to patients in Augmented Care Units. After previous monitoring with environmental and patient samples, we now explore the impact of removing sinks from ICU cubicles on incidental isolations related to health care in bronchoaspirate samples of patients with invasive mechanical ventilation (IMV). MATERIAL AND METHODS: Quasi-experimental study, before-and-after, pre-intervention annuities April 2014-2016 and post-intervention April 2016-2017. Incidence densities per 1,000 days of IMV were studied, comparing by the exact method based on the binomial distribution and estimating the incidence density ratio. RESULTS: The incidence densities per 1,000 days of IMV of isolations by NFGNB in bronchoaspirate samples of the pre and post-intervention periods were 11.28 and 1.9, respectively. This implies a post-intervention incidence density 5.90 times lower than before (95% CI: 1.49-51.05, P=.003). CONCLUSIONS: Despite of the limitations of the design, the removal of sinks showed a reduction of the isolations.

Under-utilization of taps in intensive care unit as a cause of reservoirs of nonfermenting gram-negative bacilli. / La infrautilización de grifos en una unidad de cuidados intensivos como causa de reservorios de bacilos gramnegativos no fermentadores.

INTRODUCTION: The under-utilisation of taps is associated with the generation of reservoirs of non-fermenting gram-negative bacilli with the ability to disseminate. We describe the detection and approach of the problem in an ICU. METHODS: Observational descriptive study in an ICU with individual cubicles with their own sink. We collected clinical samples from patients and environmental samples from tap aerators and reviewed the unit's hygiene measures. RESULTS: We detected four cases due to Chryseobacterium indologenes, one to Elizabethkingia meningoseptica and another to Pseudomonas aeruginosa; they were identified both in clinical and the environmental samples. The healthcare professionals reported that almost every hand hygiene opportunity was performed with a hydroalcoholic solution. After considered the daily flushing of water outlets as inefficient, it was decided to remove them. CONCLUSIONS: National recommendations were insufficient for preventing, detecting and controlling tap contamination in units with a high risk of infection. The management of taps in these units needs to be improved.

Optimisation of empirical antimicrobial therapy in patients with haematological malignancies and febrile neutropenia (How Long study): an open-label, randomised, controlled phase 4 trial.

BACKGROUND: Continuation of empirical antimicrobial therapy (EAT) for febrile neutropenia in patients with haematological malignancies until neutrophil recovery could prolong the therapy unnecessarily. We aimed to establish whether EAT discontinuation driven by a clinical approach regardless of neutrophil recovery would optimise the duration of therapy. METHODS: We did an investigator-driven, superiority, open-label, randomised, controlled phase 4 clinical trial in six academic hospitals in Spain. Eligible patients were adults with haematological malignancies or haemopoietic stem-cell transplantation recipients, with high-risk febrile neutropenia without aetiological diagnosis. An independent, computer-generated randomisation sequence was used to randomly enrol patients (1:1) to the experimental or control group. Investigators were masked to assignment only before randomisation. EAT based on an antipseudomonal ß-lactam drug as monotherapy (ceftazidime or cefepime, meropenem or imipenem, or piperacillin-tazobactam) or as combination therapy (with an aminoglycoside, fluoroquinolone, or glycopeptide) was started according to local protocols and following international guidelines and recommendations. For the experimental group, EAT was withdrawn after 72 h or more of apyrexia plus clinical recovery; for the control group, treatment was withdrawn when the neutrophil count was also 0·5 × 109 cells per L or higher. The primary efficacy endpoint was the number of EAT-free days. Primary analyses were done in the intention-to-treat population. Efficacy and safety analyses were done in the intention-to-treat population and the per-protocol population. This trial is registered with ClinicalTrials.gov, number NCT01581333. FINDINGS: Between April 10, 2012, and May 31, 2016, 157 episodes among 709 patients assessed for eligibility were included in analyses. 78 patients were randomly assigned to the experimental group and 79 to the control group. The mean number of EAT-free days was significantly higher in the experimental group than in the control group (16·1 [SD 6·3] vs 13·6 [7·2], absolute difference -2·4 [95% CI -4·6 to -0·3]; p=0·026). 636 adverse events were reported (341 in the experimental group vs 295 in the control group; p=0·057) and most (580 [91%]; 323 in the experimental group vs 257 in the control group) were considered mild or moderate (grade 1-2). The most common adverse events in the experimental versus the control group were mucositis (28 [36%] of 78 patients vs 20 [25%] of 79 patients), diarrhoea (23 [29%] of 78 vs 24 [30%] of 79), and nausea and vomiting (20 [26%] of 78 vs 22 [28%] of 79). 56 severe adverse events were reported, 18 in the experimental group and 38 in the control group. One patient died in the experimental group (from hepatic veno-occlusive disease after an allogeneic haemopoietic stem-cell transplantation) and three died in the control group (one from multiorgan failure, one from invasive pulmonary aspergillosis, and one from a post-chemotherapy intestinal perforation). INTERPRETATION: In high-risk patients with haematological malignancies and febrile neutropenia, EAT can be discontinued after 72 h of apyrexia and clinical recovery irrespective of their neutrophil count. This clinical approach reduces unnecessary exposure to antimicrobials and it is safe. FUNDING: Instituto de Salud Carlos III, Spanish Ministry of Economy (PI11/02674).

La infrautilización de grifos en una unidad de cuidados intensivos como causa de reservorios de bacilos gramnegativos no fermentadores / Under-utilization of taps in intensive care unit as a cause of reservoirs of nonfermenting gram-negative bacilli

INTRODUCCIÓN: La infrautilización de grifos se relaciona con reservorios de bacilos gramnegativos no fermentadores en su interior con capacidad de diseminación. Se describe la detección del problema y abordaje en una UCI. MÉTODOS: Estudio descriptivo en una UCI con boxes individuales con lavabo propio. Se recogieron muestras clínicas de pacientes y ambientales de los aireadores de los grifos. Se revisaron medidas de higiene. RESULTADOS: Se identificaron 4 casos de Chryseobacterium indologenes, uno de Elizabethkingia meningoseptica y otro por Pseudomonas aeruginosa, tanto en muestras clínicas como ambientales. Los profesionales indicaron utilizar solución hidroalcohólica casi siempre en la higiene de manos. Tras descartar la apertura controlada diaria de grifos por ineficiente, se decidió su retirada. CONCLUSIONES: Las recomendaciones nacionales resultaron insuficientes para la prevención, detección y control de la contaminación de los grifos de una unidad de alto riesgo de infección. Es necesario mejorar el manejo de los grifos en estas unidades

INTRODUCTION: The under-utilisation of taps is associated with the generation of reservoirs of non-fermenting gram-negative bacilli with the ability to disseminate. We describe the detection and approach of the problem in an ICU. METHODS: Observational descriptive study in an ICU with individual cubicles with their own sink. We collected clinical samples from patients and environmental samples from tap aerators and reviewed the unit's hygiene measures. RESULTS: We detected four cases due to Chryseobacterium indologenes, one to Elizabethkingia meningoseptica and another to Pseudomonas aeruginosa; they were identified both in clinical and the environmental samples. The healthcare professionals reported that almost every hand hygiene opportunity was performed with a hydroalcoholic solution. After considered the daily flushing of water outlets as inefficient, it was decided to remove them. CONCLUSIONS: National recommendations were insufficient for preventing, detecting and controlling tap contamination in units with a high risk of infection. The management of taps in these units needs to be improved

Effectiveness and satisfaction in non-critical surface cleaning and disinfection using quaternary ammonium-based spray and wipe formats / Efectividad y satisfacción en la limpieza y desinfección de superficies no críticas utilizando amonio cuaternario en formatos de aerosol y toallitas húmedas

OBJECTIVE: To compare the effectiveness and satisfaction with the use of sprays and wipes formats under healthcare facilities conditions. METHODS: Randomized crossover experimental study in four hospitals in the Region of Madrid. A quaternary ammonium formula in spray and wipe formats in a crossover manner over two weeks in all the units. The effectiveness was evaluated by means of relative light unit (RLU). The variables of effectiveness, method of use and satisfaction were taken into account. RESULTS: Samples were taken from 162 surfaces and no differences were found after disinfection, 60.00 (17.00-148.00) RLU for sprays and 67.00 (36.00-139.00) RLU for wipes (p = 0.271). A wider range of uses and results was found for sprays. 70.96% of the staff (n = 93) preferred wipes over sprays. CONCLUSIONS: Being equally effective, disinfection with wipes generated greater satisfaction with less variety in the results than sprays

OBJETIVO: Comparar la efectividad y satisfacción con el uso de aerosoles y formatos de toallitas húmedas en las condiciones de los centros de salud. MÉTODOS: Estudio experimental aleatorizado, cruzado en cuatro hospitales de la Comunidad de Madrid. Una fórmula de amonio cuaternario en formato aerosol y toallitas de forma cruzada durante dos semanas en todas las unidades. La efectividad se evaluó mediante Unidades Relativas de Luz (RLU). Se tuvieron en cuenta las variables de efectividad, método de uso y satisfacción. RESULTADOS: Se tomaron muestras de 162 superficies y no se encontraron diferencias después de la desinfección, 60,00 (17,00-148,00) RLU para aerosoles y 67,00 (36,00-139,00) RLU para toallitas (p = 0,271). Se encontró una gama más amplia de usos y resultados para los aerosoles. El 70,96% del personal (n = 93) prefirió las toallitas húmedas a los aerosoles. CONCLUSIONES: Siendo igualmente eficaz, la desinfección con toallitas generó mayor satisfacción con menos variedad en los resultados que los aerosoles

Impacto de la retirada de los lavabos en una unidad de cuidados intensivos sobre los aislamientos por bacilos gramnegativos no fermentadores en pacientes con ventilación mecánica invasiva / Impact of removing sinks from an intensive care unit on isolations by gram-negative non-fermenting bacilli in patients with invasive mechanical ventilation

Introducción y objetivo: La contaminación de los lavabos, incluso por su infrautilización, se asocia a la transmisión de bacilos gramnegativos no fermentadores (BGNNF) en unidades que atienden a pacientes con alto riesgo de infección. Tras vigilancia previa con muestras ambientales y de pacientes, se explora ahora el impacto de la retirada de los lavabos de los boxes de una UCI sobre aislamientos incidentes relacionados con la atención sanitaria en muestras de broncoaspirado de pacientes con ventilación mecánica invasiva (VMI). Material y métodos: Estudio cuasiexperimental antes-después, con anualidades preintervención y postintervención correspondientes a los períodos abril 2014-2016 y abril 2016-2017, respectivamente. Se estudiaron las densidades de incidencia por 1.000 días de VMI comparándose por el método exacto basado en la distribución binomial y estimándose la razón de densidades de incidencia. Resultados: Las densidades de incidencia por 1.000 días de VMI de aislamientos por BGNNF en las muestras de broncoaspirado de los períodos pre y postintervención fueron 11,28 y 1,91, respectivamente, lo que supone una densidad de incidencia postintervención 5,90 veces menor que la previa (IC95%: 1,49-51,05; p=0,003). Conclusiones: A pesar de las limitaciones del diseño, la retirada de los lavabos apunta a una reducción de los aislamientos

Introduction and objective: Contamination of sinks, even due to their underuse, is associated with the transmission of non-fermenting gram-negative bacilli (NFGNB) to patients in Augmented Care Units. After previous monitoring with environmental and patient samples, we now explore the impact of removing sinks from ICU cubicles on incidental isolations related to health care in bronchoaspirate samples of patients with invasive mechanical ventilation (IMV). Material and methods: Quasi-experimental study, before-and-after, pre-intervention annuities April 2014-2016 and post-intervention April 2016-2017. Incidence densities per 1,000 days of IMV were studied, comparing by the exact method based on the binomial distribution and estimating the incidence density ratio. Results: The incidence densities per 1,000 days of IMV of isolations by NFGNB in bronchoaspirate samples of the pre and post-intervention periods were 11.28 and 1.9, respectively. This implies a post-intervention incidence density 5.90 times lower than before (95% CI: 1.49-51.05, P=.003). Conclusions: Despite of the limitations of the design, the removal of sinks showed a reduction of the isolations