Explore the vast range of titles available.

LiteBIRD, a forthcoming satellite mission, aims to measure the polarization of the Cosmic Microwave Background (CMB) across the entire sky. The experiment will employ three telescopes, Transition-Edge Sensor (TES) bolometers and rotating Half-Wave Plates (HWPs) at cryogenic temperatures to ensure high sensitivity and systematic effects mitigation. This study is focused on the Mid- and High-Frequency Telescopes (MHFT), which will use rotating metal mesh HWPs. We investigate how power variations due to HWP differential emissivity and transmittance combine with TES nonlinear responsivity, resulting in an effective instrumental polarization. We present the results of simulations for the current HWP design, modeling the TES deviation from linearity as a second-order response. We quantify the level of acceptable residual nonlinearity assuming the mission requirement on the tensor-to-scalar ratio, \\(\\delta r < 0.001\\). Moreover, we provide an accuracy requirement on the measurement of TES responsivity nonlinearity level for MHFT channels. Lastly, we present possible mitigation methods that will be developed in future studies.

Water and energy are two strategic drivers of sustainable development, intimately interlaced and vital for a secure future of humanity. Given that water resources are limited, whereas global population and energy demand are exponentially growing, the competitive balance between these resources, referred to as the water-energy nexus, is receiving renewed focus. The desalination industry alleviates water stress by producing freshwater from saline sources, such as seawater, brackish or groundwater. Since the last decade, the market has been dominated by membrane desalination technology, offering significant advantages over thermal processes, such as lower energy demand, easy process control and scale-up, modularity for flexible productivity, and feasibility of synergic integration of different membrane operations. Although seawater reverse osmosis (SWRO) accounts for more than 70% of the global desalination capacity, it is circumscribed by some significant technological limitations, such as: (i) the relatively low water recovery factor (around 50%) due to the negative impact of osmotic and polarization phenomena; (ii) an energy consumption in the range of 3–5 kWh m −3 , still far from the theoretical energy demand (1.1 kWh m −3 ) to produce potable water from seawater (at 50% water recovery factor). Ultimately, desalination is an energy intensive practice and research efforts are oriented toward the development of alternative and more energy-efficient approaches in order to enhance freshwater resources without placing excessive strain on limited energy supplies. Recent years have seen a relevant surge of interest in membrane distillation (MD), a thermally driven membrane desalination technology having the potential to complement SWRO in the logic of Process Intensification and Zero Liquid Discharge paradigm. Due to its peculiar transport mechanism and negligibility of osmotic phenomena, MD allows high-quality distillate production (theoretically, non-volatile species are completely rejected) with a recovery factor of up to 80% at a relatively low operative temperature (typically 60 °C–80 °C). Although low operative temperatures make MD technology attractive for renewable power applications (e.g. solar thermal, wind or geothermal energy sources) or for efficient exploitation of low-grade or waste heat streams, the low energy efficiency intrinsically due to heat losses—and specifically to temperature polarization—has so far hindered the application at industrial scale. Nowadays, photothermal materials able to absorb and convert natural or artificial irradiation into heat have gained great attention, demonstrating the potential to mitigate the ‘anthropic’ energy input to MD and to mitigate the impact of thermal inefficiencies. On this road, a step-change improvement in light-to-heat conversion is expected through high-throughput computational screening over thermoplasmonic materials based on electronic and optical properties of advanced materials including novel topological phases of matter used as nanofillers in polymeric membranes. Coherently with the concept of Circular Economy, waste hypersaline solutions rejected from desalination process (referred as ‘brine’) are now the subject of valorization activities along two main exploitation routes: (1) recovery of valuable minor and trace metals and minerals, with special focus on critical raw materials (including, among others, Mg, Na, Ca, K, Sr, Li, Br, B, and Rb); (2) production of salinity gradient power (SGP) renewable energy resulting from the recovery of the Gibbs energy of mixing (mainly represented by the entropic contribution) of two solutions having different ionic concentration. The exciting new frontier of sustainable mining of seawater concentrates is accelerating the appearance of a plethora of innovative membrane materials and methods for brine dehydration and selective extraction of trace ions, although under the sword of Damocles represented by cost feasibility for reliable commercial application. On the other hand, among several emerging technologies, reverse electrodialysis (SGP-RED) was already proven capable—at least at the kW scale–of turning the chemical potential difference between river water, brackish water, and seawater into electrical energy. Efforts to develop a next generation of ion exchange membranes exhibiting high perm-selectivity (especially toward monovalent ions) and low electrical resistance, to improve system engineering and to optimize operational conditions, pursue the goal of enhancing the low power density so far achievable (in the order of a few W per m 2 ). This Roadmap takes the form of a series of short contributions written independently by worldwide experts in the topic. Collectively, such contributions provide a comprehensive picture of the current state of the art in membrane science and technology at the water-energy nexus, and how it is expected to develop in the future. In addition, this Roadmap acknowledges the challenges and advances in membrane systems, particularly emphasizing the interplay of material innovation and system optimization, which collectively contribute to advancing the desalination field within the water-energy nexus framework.

Patients who have undergone total laryngectomy (TL) are, in most cases, affected by lung disease due to smoking habits. Therefore, as part of the follow‐up protocol for these patients, a spirometry test should be performed to adequately assess lung function. Current spirometers do not allow for spirometry tests in patients who breathe through a tracheostomy, as the patient cannot perform respiratory acts from the spirometer mouthpiece, which is designed to be used by mouth. We have, therefore, designed a device that allows the test to be performed through the tracheostoma. The device is made of biocompatible polymeric material, modeled using a 3‐dimensional printer, reusable, and hermetically connected to the spirometer distally and to the tracheostoma proximally. The device was used on 5 patients who underwent TL and was found to be comfortable, safe, and valid for diagnostic purposes.

Cardiac rehabilitation (CR) is Class IA indication in patients after an acute cardiovascular (CV) event, with efficacy confirmed even in elderly or frail CV patients CV and geriatric outcomes. However, rate of referral and admission to CR of elderly CV patients remains very low. CV patients admitted in geriatric wards are often complex, multimorbid and frail. Therefore, the present position paper addressees their possible referral to CR, since many have various forms of CV diseases amenable to improve with CR. The multidisciplinary and comprehensive model of CR is applicable to these patients where evaluation and interventions should be tailored to the patient functional and clinical status, aiming to appropriate targets. Cardiologist, Geriatrician and other professionals, should synergistically integrate their competences, thus outlining also the new paradigm of \"Cardiogeriatric Rehabilitation and Prevention\", possibly leading to an increased awareness of the beneficial effect of CR and to an increased referral to CR from Geriatric departments. Operative recommendations are given, based on appropriateness and priority of indications, clinical risk and frailty level, integrating different expertise to reach more effective programs of care.

Aims Valvular heart disease (VHD) is the third leading cause of cardiovascular morbidity, with its incidence and public health impact projected to increase significantly. This study adopts a novel perspective, focusing on elderly individuals residing in rural areas, highlighting the unique dynamics of small-town settings. Methods This multicenter, observational study was conducted from May 2022 to September 2023, under the coordination of the AOU Careggi Echo Core-Lab, which managed the entire screening program. In 10 small Italian villages, each municipality facilitated the enrollment of asymptomatic individuals aged ≥ 65 years, with no prior VHD history, through voluntary participation. Participants were grouped into three age categories (65–69, 70–74, and ≥ 75 years) and underwent a thorough evaluation, including a Quality of Life (QoL) questionnaire and comprehensive echocardiographic assessment focusing on VHD detection and grading. Results Among 1,113 participants, the prevalence and severity of VHD showed a significant increase with age ( p  < 0.0001). Remarkably, 94% of individuals aged ≥ 75 years had at least one valvular defect, with 22.5% presenting moderate or severe valvulopathy, including a prevalence of 4.8% for moderate or severe aortic valve stenosis and 7.5% for mitral regurgitation. Right-sided valvulopathies followed a similar trend, affecting 71.9% of elderly participants. QoL evaluations revealed a generally positive perceived health status, with a mean score of 77 ± 16. Conclusions Our registry highlights that the prevalence of VHD in asymptomatic individuals over 65 years living in small Italian communities is substantial, increases with age, and is predominantly degenerative in etiology. Notably, most individuals with undiagnosed VHD perceived themselves as healthy.

La Cardiologia riabilitativa (CR) rappresenta una indicazione di classe IA nei pazienti dopo un evento cardiovascolare (CV), con efficacia confermata anche nei cardiopatici anziani o fragili. Tuttavia il tasso di invio alla CR dei pazienti CV anziani rimane molto basso. Le ragioni sono molteplici: i pazienti con patologia indice CV sono spesso complessi, con più patologie croniche concomitanti e fragili; tuttavia tra di essi vi è una quota con presentazione di malattia CV suscettibile di miglioramento con la CR. Il presente documento si occupa del possibile referral alla CR dei cardiopatici anziani dalle geriatrie, dal momento che il modello multidisciplinare della CR può offrire l’insieme delle valutazioni e degli interventi, accuratamente adattati allo stato funzionale e clinico, orientati al raggiungimento di obiettivi appropriati per il singolo paziente. Il cardiologo, il geriatra e gli altri professionisti dovrebbero integrare sinergicamente le loro competenze, delineando così un nuovo paradigma di “Riabilitazione e prevenzione cardiogeriatrica”, che potrebbe portare a una maggiore consapevolezza dell’effetto favorevole della CR, favorendo così un maggiore invio alla CR da parte dei reparti geriatrici. Vengono fornite raccomandazioni operative per la selezione dei pazienti, basate su priorità delle indicazioni, rischio clinico e livello di fragilità, integrando diverse competenze per raggiungere programmi di cura più appropriati.