295 research outputs found
Solar greenhouses: Climates, glass selection, and plant well-being
No full textSolar greenhouses are currently the most energy-intensive agricultural sector. In literature, there is no worldwide mapping of solar greenhouse performance under different climate scenarios. This study analyzes the performance of a Venlo solar greenhouse for 48 localities around the world. Solar greenhouses are mainly made of a transparent envelope and the effect of the direct and diffuse component of solar radiation impacts the internal plant well-being. This study aims to identify the best solution of a transparent envelope on locations with different latitudes and evenly distributed around the globe. The simulations are carried out using TRNsys, considering different thermal phenomena three-dimensional shortwave and longwave radiative exchange, airflow exchanges, presence of lamps with their exact 3D position, ground, plant evapotranspiration, and convective heat transfer coefficients. A total of 336 simulations are performed in the free-floating regime. A new index for the identification of the best glass solutions based on annual average deviation is defined. For all climates, the best glass solutions work better in winter than in summer. The optimal choice of the glass must be combined with effective scheduling of openings for natural ventilation to avoid internal overheating phenomena
Posmemoria, traducción y montaje del recuerdo
No full textThe aim of this article is to demonstrate how post-memory, that is, the process of generational transmission of memory, is closely linked to the concepts of translation and re-writing. To confirm this argumentation, the author analyses the documentary El silencio es un cuerpo que cae (2017), written and directed by the Argentinian filmmaker Agustina Comedi. The movie, an example of found footage, using amateur home movies of her family, intertwines private and collective memories with reflections on the new, possible and different modalities to transmit the memory of homosexuality across generations
Azienda Ospedaliera “Pia Fondazione di Culto e Religione.«Cardinale Giovanni Panico»” di Tricase (Italia)
No full textThe article presents history of “Cardinale Giovanni Panico” the hospital which was transformed into Hospital-Corporation “Pia fondazione di culto e religione ‘Cardinale Giovanni Panico’” in Tricase, Italy. The Hospital Corporation arose from the Vatican diplomat Giovanniego Panico’s idea and initiative. The activity of the International Institute of Sisters Marcellin (Istituto Internazionale delle Suore Marcelline) led to its actual functioning and constant development with continual help of suitable church and secular authorities. The future cardinal was sensitive to people’s suffering and lack of suitable health care; his work in many diplomatic agencies in different countries, usually poor and neglected, led to the idea of opening a small hospital in his hometown. The article is an attempt to show in an chronological order history and achievements of one of many Italian hospital corporations. However, the presented institution deserves special attention. The text shows how the private nursing home brought to life in 1963 (casa di cura privata) developed into an important Hospital Corporation in Italy which is defined as the only hospital-medical consortium classified as religious (ospedale religioso classificato). In the article the author does not only present mentioned chronology and achievements of the powerful medical facility, but also the role and need of transplanting on the ground of medical care catholic values as those which help to come back to physical health. The author also presents educational values of suffering in the Christian point of view.The article presents history of “Cardinale Giovanni Panico” the hospital which was transformed into Hospital-Corporation “Pia fondazione di culto e religione ‘Cardinale Giovanni Panico’” in Tricase, Italy. The Hospital Corporation arose from the Vatican diplomat Giovanniego Panico’s idea and initiative. The activity of the International Institute of Sisters Marcellin (Istituto Internazionale delle Suore Marcelline) led to its actual functioning and constant development with continual help of suitable church and secular authorities. The future cardinal was sensitive to people’s suffering and lack of suitable health care; his work in many diplomatic agencies in different countries, usually poor and neglected, led to the idea of opening a small hospital in his hometown. The article is an attempt to show in an chronological order history and achievements of one of many Italian hospital corporations. However, the presented institution deserves special attention. The text shows how the private nursing home brought to life in 1963 (casa di cura privata) developed into an important Hospital Corporation in Italy which is defined as the only hospital-medical consortium classified as religious (ospedale religioso classificato). In the article the author does not only present mentioned chronology and achievements of the powerful medical facility, but also the role and need of transplanting on the ground of medical care catholic values as those which help to come back to physical health. The author also presents educational values of suffering in the Christian point of view
Data from a dynamic simulation in a free-floating and continuous regime of a solar greenhouse modelled in TRNSYS 17 considering simultaneously different thermal phenomena
No full textThis dataset supports the research article “Complete green- house dynamic simulation tool to assess the crop thermal well-being and energy needs”[1] . In the agricultural sector, the use of energy can be very intensive [2] and the sim- ulation of solar greenhouses is a very complex work [3] . This dataset provides the results of thermal modeling and dynamic simulation of a solar greenhouse considering si- multaneously several thermal phenomena. The analysis was performed by TRNSYS 17 software (TRaNsient SYstem Sim- ulation)
Identifying key parameters through a sensitivity analysis for realistic hygrothermal simulations at wall level supported by monitored data
No full textThe reliability of hygrothermal simulations of building components is key for designing energy efficiency measures, assessing living comfort, and preventing building damage. The model accuracy is related to the reliability of the selection of input parameters. Due to the high uncertainty, the selection of the input values is challenging. This work aims to calibrate a hygrothermal simulation model exploiting monitored values recorded in a case study located in Settequerce (Italy), to understand how close to reality a numerical model can be. Moreover, a sensitivity analysis, based on the Morris method together with a Latin Hypercube sampling, is applied to identify the input parameters that affect most significantly the simulation. The results of the calibration indicated that is possible to obtain reliable outputs by appropriately selecting materials within the database. The sensitivity analysis showed that the relative humidity under the insulation is largely influenced by the water vapor diffusion resistance factor of the plaster, applied during the renovation phase both on the internal and external side. Among the coefficients describing the coupling with the boundary conditions, only the external convective heat coefficient and the coefficient of short-wave solar radiation influence slightly the objective function
Complete greenhouse dynamic simulation tool to assess the crop thermal well-being and energy needs
No full textGreenhouse technology is an important energy consumer sector representing an indispensable solution for modern methods of crop production. In the greenhouse envelope and system design phase, thermodynamic performance simulation tools are required. The greenhouse simulation is still a very complex task despite many building tools are available in the literature. This work aims to overcome this gap by proposing a reference methodology to accommodate the building TRNSYS software for a greenhouse able to consider simultaneously different thermal phenomena with detailed
modelling of: dense volume discretization, 3D shortwave and longwave radiative exchange, air flow exchanges, presence of lamps with their exact 3D position, ground and plant evapotranspiration, and convective heat transfer coefficients. A standard hourly simulation of the one-zone greenhouse was validated with another recognized tool, showing excellent agreement throughout the year. The main parameters affecting the greenhouse thermal
balance were investigated in both a free-floating and continuous regime. The investigation has shown that a standard simulation is accurate to only reproduce the thermal response in a free-floating regime; instead, the detailed simulation has led to overall cooling and heating energy needs in the continuous regime, respectively, of 51.4 kWh/m3 and 49.1 kWh/m3, avoiding to obtain very high errors
Imaging of adrenal tumors using F-18 FDG PET: comparison of benign and malignant lesions.
No full textHow and when should companies retain their human capital? Contracts, incentives and human resource implications
No full textThe increasing competition in the labor market for human capital pushes firms to create better incentives to manage talented individuals. In this article, we model the optimal employment contract when two features of human capital are present: (i) private information of the employee about his skills; and (ii) the inability to contract on the output of the employment activity. Our model shows how firms can use delegation (i.e., the employee's job autonomy) to provide the incentives to a privately informed employee. The model novelty resides in turning a classic source of potential inefficiency like asymmetric information into a factor that firms can use to design incentives. Our model provides a new explanation of why, in technologically dynamic environments, one observes more intense formations of start-ups and a greater inter-firm mobility of human capital. Our setting also suggests how established companies can use their complementary assets to provide better incentives to their skilled employees. Copyright 2010 The Author 2009. Published by Oxford University Press on behalf of Associazione ICC. All rights reserved., Oxford University Press.
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