Visibility Assessment of New Photovoltaic Power Plants in Areas with Special Landscape Value

Power plants based on renewable sources offer environmental, technical and economic advantages. Of particular importance is the reduction in greenhouse gas emissions compared to conventional power plants. Despite the advantages, people are often opposed to the construction of these facilities due to their high visual impact, particularly if they are close to places with a great cultural and/or landscape value. This paper proposes a new methodology for identifying the most suitable geographical areas for the construction of new photovoltaic (PV) power plants in zones of special scenic or cultural interest, helping to keep the environment free from the visual intrusions caused by these facilities. From several repeated analyses, the degree of visibility of the new PV plant, the potential observation time of passing visitors, considering the route they follow and their speed, and the increase in visibility of the plants when seen totally or partially with the sky as background, are determined. The result obtained is a map showing the ranking of the geographical areas based on a variable calculated in such analyses: the Global Accumulated Perception Time (GAPT). The application of this methodology can help the different agents involved in the decision-making process for the installation of new PV plant by providing them with an objective visibility criterion.

Road Thermal Collector for Building Heating in South Europe: Numerical Modeling and Design of an Experimental Set-Up

The combination/integration of renewable energy and storage systems appears to have significant potential, achieving high-energy results with lower costs and emissions. One way to cover the thermal needs of a building is through solar energy and its seasonal storage in the ground. The SMARTEP project aims to create an experimental area that provides for the construction of a road solar thermal collector directly connected to a seasonal low-temperature geothermal storage with vertical boreholes. The storage can be connected to a ground-to-water heat pump for building acclimatization. This system will meet the requirements of visual impact and reduction of the occupied area. Nevertheless, several constraints related to the radiative properties of the surfaces and the lack of proper thermal insulation have to be addressed. The project includes the study of several configurations and suitable materials, the set-up of a dynamic simulation model and the construction of a small-scale road thermal collector. These phases allowed for an experimental area to be built. Thanks to careful investigation in the field, it will be possible to identify the characteristics and the best operation strategy to maximize the energy management of the whole system in the Mediterranean area.

A Calibration of the Solar Load Ratio Method to Determine the Heat Gain in PV-Trombe Walls

The Trombe wall is a passive system used in buildings that indirectly transfers thermal energy to the adjacent environment by radiation and convection, and directly by the thermo-circulation that arises in the air cavity delimited between a transparent and an absorbing surface. Nevertheless, the latter is painted black to increase the energy gains, but this produces a negative visual impact and promotes the overheating risk in summer. To mitigate these aspects, a hybrid Trombe wall equipped with PV panels can be employed. The PV installation results in a more pleasing wall appearance and the overheating risk reduces because part of the absorbed solar radiation is transformed into electricity. To determine the actual performance of a such system, transient simulation tools are required to consider properly the wall thermal storage features, variation of the optical properties, air thermo-circulation, and PV power production. Alternatively, regarding the traditional Trombe wall, the literature provides a simplified empirical method based on the dimensionless parameter solar load ratio (SLR) that allows for preliminary evaluations and design. In this paper, the SLR method was calibrated to determine the monthly auxiliary energy to be supplied in buildings equipped with PV-Trombe walls in heating applications. The SLR method was tuned by a multiple linear regression by data provided by TRNSYS simulation that allowed to obtain the energy performances in actual conditions of PV-Trombe walls installed on the same building but located in different localities. The comparison between the TRNSYS results and the calibrated SLR method determined average errors ranging between 0.7% and 1.4%, demonstrating the validity of the proposed methodology.

Features of Street Photography and Its Similarities with Cinematography

The purpose of the study is to analyze the visual features of street cinema photography and techniques for its implementation; establish the role of light, colour, composition and historical features of the street genre of photography; to prove the importance of conscious departure from the established laws of photocomposition for the implementation of creative ideas. The research methodology consists in the application of the following methods: theoretical – for the study and analysis of scientific publications, articles and photo albums of street photography masters; empirical – to observe and compare visual elements between cinema and photography. Scientific novelty. The detailed analysis of the main compositional methods designed to simplify the composition and analysis of the main components of a spectacular visual image that enhance the visual impact of cinematic photography on the viewer were conducted. Conclusions. The article describes in detail the visual features of creating cinematic street photography. The elements of street photography, the affinity of style with cinematography are generalized, the components for creating a strong visual effect on the audience are identified.

Covid-19 Impact on Macular Neovascularization and Retinal Vein Occlusion Treatment: Single-Center Experience

<b><i>Purpose:</i></b> The aim of this study was to evaluate whether the coronavirus disease 19 (COVID-19) pandemic resulted in undertreatment and subsequent loss of visual acuity (VA) in patients with macular neovascularization (MNV) or retinal vein occlusion (RVO) regularly treated with intravitreal antivascular endothelial growth factor injections. <b><i>Methods:</i></b> Single-center, retrospective study of patients scheduled for treatment between March 19 and June 1, 2020, the national mandatory quarantine period. Patients’ demographics, VA, and scheduled treatment during this period were reviewed via medical records. All patients were analyzed regarding treatment attendance rates. The visual impact of COVID-19 was assessed in patients who had been treated and presented a stable VA for &#x3e;6 months before the beginning of the quarantine. <b><i>Results:</i></b> This study included 927 eyes from 769 patients. The attendance rate increased throughout the study timeframe (<i>p</i> &#x3c; 0.001) and correlated negatively with higher patient’s age (<i>r</i> = −0.142; <i>p</i> = 0.005). Patients with age-related macular degeneration (67.6%) had lower attendance rates (<i>p</i> = 0.007) and were older (<i>p</i> &#x3c; 0.001). The visual impact analysis included 400 eyes from 325 patients. The average VA variation throughout this period was −1.7 ± 8.4 ETDRS letters and was similar in different retinal pathologies (<i>p</i> = 0.334). VA variation did not correlate with the number of missed treatments per patient (<i>r</i> = 0.100; <i>p</i> = 0.150). The prevalence of subretinal fluid and intraretinal fluid, as well as central retinal thickness decreased significantly throughout the study period (<i>p</i> values of &#x3c;0.001, &#x3c;0.001, and 0.032, respectively). <b><i>Conclusion:</i></b> The COVID-19 pandemic had a significant impact on the attendance rate of patients with MNV or RVO to their scheduled treatments, which was higher in the first week of mandatory quarantine. Nevertheless, VA did not decrease significantly during this period, with a limited VA variation regardless of primary retinal disorder and morphological parameters even improved in the eyes included in the visual impact analysis.

Metamaterial-Inspired Flat Beamsteering Antenna for 5G Base Stations at 3.6 GHz

In this paper, a metamaterial-inspired flat beamsteering antenna for 5G applications is presented. The antenna, designed to operate in the 3.6 GHz at 5G frequency bands, presents an unique flat form factor which allows easy deployment and low visual impact in 5G dense scenarios. The antenna presents a multi-layer structure where a metamaterial inspired transmitarray enables the two-dimensional (2D) beamsteering, and an array of microstrip patch antennas is used as RF source. The use of metamaterials in antenna beamsteering allows the reduction of costly and complex phase-shifter networks by using discrete capacitor diodes to control the transmission phase-shifting and subsequently, the direction of the steering. According to simulations, the proposed antenna presents steering range up to ±20∘, achievable in both elevation and azimuth planes, independently. To prove the concept, a prototype of the antenna has been built and experimentally characterised inside an anechoic chamber. Although constructed in a different substrate (FR4 substrate) as initially designed, beamsteering ranges up to 8∘ in azimuth and 13∘ in elevation, limited to the proposed case-studies, are reported with the prototype, validating the antenna and the usefulness of the proposed design.

“They said we ruined the character and our religion”: authenticity and legitimation of hijab cosplay

Purpose This research is positioned at the intersection of youth subculture consumption and religious affiliation, through the study of observant Muslim women involved in the highly engaging and codified activity of cosplay. Given authenticity is central to the cosplay visual impact and performance, this study aims to understand the way hijab cosplayers negotiate tensions between authentic body performativity and the observance of religious dressing codes. Design/methodology/approach A qualitative interpretive approach was used to address the research questions. In-depth semi-structured online interviews were conducted with 25 members of a hijab cosplayers from South East Asia. Findings The concept of authenticity emerged as multifaceted for hijab cosplayers, where they manage three different aspect of the authentic cosplay performance as follows: authenticity as a cosplayer (social dimension of authenticity), authenticity to the character (personal dimension of authenticity) and authenticity to their religious identity (religious dimension of authenticity). The subsequent malleable authenticity is used to legitimate cosplay as an acceptable performative practice from a religious and from subcultural view. Originality/value The research highlights how tensions between identity and performativity of the body are negotiated. More specifically, the study contributes to the understanding of the way hijab cosplayers reconcile tensions between religious identity and the performativity of the body. Given the role of the body as a site for negotiating identity, this study provides important insights in the tensions and strategies at the intersection of authenticity, embodiment and religious identity in youth cultures.

Bordering on Asian Paintings: Dye Analysis of Textile Borders and Mount Elements to Complement Research on Asian Pictorial Art

Mount components and textile borders represent important elements of Asian paintings. However, they are often side-lined or not considered an integral part of the original piece, as they may be later additions or may have been replaced during historic conservation or mounting interventions. Nevertheless, evidence is sometimes present that textile borders are contemporaneous to the production of the paintings they frame or, in the case of paintings found in archaeological contexts, to the time of deposition. Even when not contemporaneous with the paintings, the mount textiles are often of significant historic interest in themselves, showing a range of complex textile techniques and materials, and highlighting the re-use of fabrics. In all these cases, the study and reconstruction of the original colours of the borders enable further understanding of the holistic visual impact originally intended for the composition, as well as of the role of colour itself, which was used to emphasise, complement or contrast important pictorial themes or motifs in the paintings. Furthermore, the identification of dyes and dyeing techniques has the potential to support the production date and provenance of the paintings. In this study, the textile borders and some additional mounting elements of six paintings (late 9th–10th century CE) from the Library Cave, Mogao Grottoes, Dunhuang, China, one rare Korean portrait painting dated 1789 CE, and two Tibetan thangkas (18th century) were investigated with the aim to identify the dyes present. Fibre optic reflectance spectroscopy (FORS) was used to obtain information non-invasively and, when sampling was possible, high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was used to obtain molecular identification of the dyestuffs employed in their production. Typical Asian dyes, such as gromwell (Lithospermum erythrorhizon), sappanwood (Biancaea sappan), safflower (Carthamus tinctorius), turmeric (Curcuma longa) and pagoda tree flower buds (Sophora japonica), were identified. Some of the dyeing techniques were commensurate with the geographical and temporal provenance assigned to these pieces. Considerations about fading and discolouration of the dyes enabled valuable additional information to be obtained that complements the evidence gleaned from the study of the paintings and informs conservators and curators on best practices in the preservation and display of these precious and delicate artworks.