Suchergebnisse

In-flight communication (IFC) services offered to passengers and crew are of great importance to the air transport sector. The improvement of the satellite capacity with High Throughput Satellites (HTS) in GEO and the advent of MEO and LEO constellations will support the forecast growth of the IFC market. Antenna equipment for satellite communications will need to address multiple scenarios from G2G (Gate-to-Gate) to multi-operation under GEO-MEO-LEO systems. Under these conditions, antennas with the ability to track multiple satellites and having superior performance and reliability will play a key role. Electronically steered antennas (ESA) have emerged as a viable solution in response to these demands. The EU-funded LESAF project proposes an ESA solution of reduced size and greater efficiency for the next generation of in-flight connectivity services. This will be managed through the requirements definition, system analysis, technology assessment, prototyping and validation of ESAs. The project has successfully passed the first milestone corresponding to requirements consolidation, baseline architecture definition and candidate technology trade-offs. Multi-beam Electronically Steered Antennas, separated apertures for both transmission and reception, a flexible modular approach coupled with planar multilayer integration and an advanced beamformer design are the basis for the proposed concept. The following project phase will be focused on the design and validation of an antenna demonstrator aimed at proving the superior added value of ESAs technological solution for the aviation industry needs.

In-flight communication (IFC) services offered to passengers and crew are of great importance to the air transport sector. The improvement of the satellite capacity with High Throughput Satellites (HTS) in GEO and the advent of MEO and LEO constellations will support the forecast growth of the IFC market. Antenna equipment for satellite communications will need to address multiple scenarios from G2G (Gate-to-Gate) to multi-operation under GEO-MEO-LEO systems. Under these conditions, antennas with the ability to track multiple satellites and having superior performance and reliability will play a key role. Electronically steered antennas (ESA) have emerged as a viable solution in response to these demands. The EU-funded LESAF project proposes an ESA solution of reduced size and greater efficiency for the next generation of in-flight connectivity services. This will be managed through the requirements definition, system analysis, technology assessment, prototyping and validation of ESAs. The project has successfully passed the first milestone corresponding to requirements consolidation, baseline architecture definition and candidate technology trade-offs. Multi-beam Electronically Steered Antennas, separated apertures for both transmission and reception, a flexible modular approach coupled with planar multilayer integration and an advanced beamformer design are the basis for the proposed concept. The following project phase will be focused on the design and validation of an antenna demonstrator aimed at proving the superior added value of ESAs technological solution for the aviation industry needs.

This study assesses the extent to which individual levels of trust in foreigners relate to preferences about regional transnational policies. We use a nationally representative survey from Mexico (2003), an emerging democracy with relatively high levels of nationalism and several multinational trade agreements. We argue that clarifying the target of social trust is essential for understanding the attitudes of citizens of less powerful countries toward the international policy realm. Statistical analysis strongly suggests that in fact trust in foreigners, above generalized trust, is key to understanding such attitudes. Our results indicate that trust in foreigners among Mexican respondents is positively associated with support for open immigration policies, the North American Free Trade Agreement, and political union with the United States.

A novel coronavirus (COVID-19) was firstly identified in Wuhan by the end of 2019. China has implemented a series of preventive measures to deter COVID-19 spread and its consequences since the beginning of the epidemic. In China, the expansion of COVID-19 has been slowed down significantly through the effort of all contributors, including governments, nongovernments, and civil society. All collaborators have been actively involved in combating the epidemic, using their respective strengths to play their roles. China has mitigated the number of cases due to the mobilization of the whole society and collaborators joining collective efforts and actions in solidarity to tackle and conquer the virus. To date, China has continued to implement actions to control any resurgence of new cases of COVID-19 and keep its population safe. The people's united effort against the virus has enhanced a great insight into China, and it might serve as a model to the global community in fighting the COVID-19 pandemic in terms of coordination, solidarity, decisiveness, and leadership.

TREASURE project aims to develop sustainable pork chains based on European local pig breeds. The Porc Negre Mallorquí (Majorcan Black Pig, MBP) is an untapped pig breed from Mallorca, in the Balearic Islands, included in the project due its high rusticity, adaptation to the environment and meat quality differentiation. Particularities of MBP are mostly unknown out from Mallorca, with only one representative meat product, the 'sobrassada de Mallorca de Porc Negre', a fatrich cured sausage owning a PGI trademark. Carcass, meat and fat quality of MBP was evaluated, according to a standardised toolbox of parameters. The toolbox aimed for a harmonised knowledge of untapped breeds, made from the contribution of researcher's expertise and the literature. The mean values and standard deviation for carcass traits (n=29) were: 156.8±11.8 kg for live weight, 125.3±12.9 kg for carcass weight, 75.1±3.2% for carcass dressing, 88.7±3.7 cm for carcass length and 55.2±10.1 mm for ZP fat. The most remarkable results for the meat quality parameters toolbox (n=58) were an ultimate pH of 5.58±0.12 and electrical conductivity of 6.99±3.44 mS, a lightness value (L*) of 44.10±3.59, a drip loss of 1.49±1.46%, a shear force of 3.46±1.07 kg, and an intramuscular fat (IMF) content of 6.11±3.09%. The maximum value of IMF was 19%, a hint of the wide variability within this untapped breed, representing a disadvantage for the product standardisation in case of fresh meat, but not for 'sobrassada', mainly made of grounded ham, shoulder and loin. The results for the major fatty acid (FA) groups in back fat (n=48) samples were 41.00±1.42% of saturated FA, 51.27±1.64% monounsaturated FA and 6.88±0.71% polyunsaturated FA. 'Sobrassada' includes 40-50% of back fat, thus the FA composition is critical for product quality. The FA composition, with a high proportion of MUFA and low of PUFA contributes to an optimal technological quality of MBP back fat. Funded by European Union's H2020 RIA program (grant agreement no. 634476).