Search

The Charles Keck reliefs on the Nelson-Atkins Museum of Art in Kansas City, MO, portray the triumph of white settlers over Native Americans, who are depicted as stereotypically aggressive and 'barbaric'. Keck's sculptures invite comparison to the metopes of the Parthenon, which depict the triumph of Greek and Athenian 'civilization' over 'barbarism'. The central focus of Keck's reliefs is Fortitude, an allegorical figure whose image throughout art history is indebted to depictions of Athena and Minerva, and who serves for the Nelson-Atkins as a modern American proxy for the Athenian goddess. As the Periclean building programme proclaimed Athenian superiority and had long-term cultural and economic impacts for Athens, the Nelson-Atkins is intimately connected to the economic and urban development of Kansas City, including its history of racist real estate practices, engineered by a founding trustee of the museum, which became a national model. [ABSTRACT FROM AUTHOR]

Soft protons populating the space environment have affected the performance of the X-ray detectors on board Chandra and XMM-Newton, and they pose a threat for future high energy astrophysics missions with larger aperture, such as ATHENA. In this paper, we aim to predict the soft proton induced ATHENA backgrounds from the modelling of the orbital flux obtained using eROSITA on board SRG. To this end, we analysed the background measured by eROSITA and with the help of simulations we defined a range of values for the potential count-rate of quiet-time soft protons focused through the mirror shells. We used it to derive an estimate of the orbital soft proton flux, from which the induced background for the WFI and X-IFU detectors can be predicted, assuming ATHENA in the same L2-orbit as SRG. The scaling, based on the computed proton transmission yields of the optics and optical/thermal filters, indicates that the soft proton induced WFI and X-IFU backgrounds could be expected within the requirement. Regardless of where ATHENA will be placed (L1 or L2), our analysis also suggests that increasing somewhat the thickness of the WFI optical blocking filter, e.g. by ∼ 30%, would help to further reduce the soft proton flux onto the detector, which might be worth in case the planned magnetic diverters perform worse than expected due to soft proton neutralisation at the mirror level. [ABSTRACT FROM AUTHOR]

The X-ray Integral Field Unit (X-IFU) is the high-resolution X-ray spectrometer to fly on board the Athena Space Observatory of the European Space Agency (ESA). It is being developed by an international Consortium led by France, involving twelve ESA member states, plus the United States. It is a cryogenic instrument, involving state of the art technology, such as micro-calorimeters, to be read out by low noise electronics. As the instrument was undergoing its system requirement review (in 2022), a life cycle assessment (LCA) was performed to estimate the environmental impacts associated with the development of the sub-systems that were under the responsibility of the X-IFU Consortium. The assessment included the supply, manufacturing and testing of sub systems, as well as involved logistics and manpower. We find that the most significant environmental impacts arise from testing activities, which is related to energy consumption in clean rooms, office work, which is related to energy consumption in office buildings, and instrument manufacturing, which is related to the use of mineral and metal resources. Furthermore, business travels is another area of concern, despite the policy to reduced flying adopted by the Consortium. As the instrument is now being redesigned to fit within the new boundaries set by ESA, the LCA will be updated, with a focus on the hot spots identified in the first iteration. The new configuration, consolidated in 2023, is significantly different from the previously studied version and is marked by an increase of the perimeter of responsibility for the Consortium. This will need to be folded in the updated LCA, keeping the ambition to reduce the environmental footprint of X-IFU, while complying with its stringent requirements in terms of performance and risk management. [ABSTRACT FROM AUTHOR]

Copyright of Art-E is the property of Suleyman Demirel University, Faculty of Fine Arts and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The X-ray Integral Field Unit (X-IFU) is one of the two focal plane detectors of Athena, a large-class high energy astrophysics space mission approved by ESA in the Cosmic Vision 2015–2025 Science Program. The X-IFU consists of a large array of transition edge sensor micro-calorimeters that operate at ~100 mK inside a sophisticated cryostat. To prevent molecular contamination and to minimize photon shot noise on the sensitive X-IFU cryogenic detector array, a set of thermal filters (THFs) operating at different temperatures are needed. Since contamination already occurs below 300 K, the outer and more exposed THF must be kept at a higher temperature. To meet the low energy effective area requirements, the THFs are to be made of a thin polyimide film (45 nm) coated in aluminum (30 nm) and supported by a metallic mesh. Due to the small thickness and the low thermal conductance of the material, the membranes are prone to developing a radial temperature gradient due to radiative coupling with the environment. Considering the fragility of the membrane and the high reflectivity in IR energy domain, temperature measurements are difficult. In this work, a parametric numerical study is performed to retrieve the radial temperature profile of the larger and outer THF of the Athena X-IFU using a Finite Element Model approach. The effects on the radial temperature profile of different design parameters and boundary conditions are considered: (i) the mesh design and material, (ii) the plating material, (iii) the addition of a thick Y-cross applied over the mesh, (iv) an active heating heat flux injected on the center and (v) a Joule heating of the mesh. The outcomes of this study have guided the choice of the baseline strategy for the heating of the Athena X-IFU THFs, fulfilling the stringent thermal specifications of the instrument. [ABSTRACT FROM AUTHOR]

In the framework of the ALFRED research and development program, the ATHENA facility will be constructed for thermal-hydraulic analysis of full-scale ALFRED components and systems. The source system of the facility is the core simulator, which aims to be representative of an ALFRED average fuel assembly. Computational fluid dynamics (CFD) codes are gaining attention for the analysis of complex systems in pool-type reactors since they are able to reproduce three-dimensional phenomena. In this paper, a multiscale approach based on porous media is proposed to reduce the computational cost of the core simulator CFD model. The multiscale approach starts with the detailed simulation of the infinite lattice domain of the fuel assembly to characterize the porous media hydraulic behavior. Then the porous media are applied in the system model. Three different approaches are investigated: (1) adopting a single porous media for the entire fuel assembly, (2) representing the bundle with two porous domains, and (3) adopting the so-called hybrid medium. The results have been compared with the reference detailed CFD simulation for performance evaluation. The first step of the analysis is the application of the multiscale approach on the CIRCE fuel pin simulator to carry out a turbulence model validation against experimental data and a comparison of the three approaches with a proven CFD model. Then the approach is applied on the ATHENA core simulator exploiting the CIRCE results. The results obtained with the porous media models are compared with a detailed CFD simulation of the core simulator to evaluate the performance of the three approaches. Eventually, the best solution is applied on a model of the entire ATHENA core simulator integrated with the feeding region. The model is tested also in transient conditions. The numerical experiment demonstrates the effectiveness of the multiscale approach in reducing the computational cost while maintaining high accuracy in representing the quantities of interest. [ABSTRACT FROM AUTHOR]

Among the envisaged experimental infrastructures supporting Advanced Lead Fast Reactor European Demonstrator (ALFRED) reactor development, the FALCON [Fostering ALfred CONstruction] consortium identified the Advanced Thermo-Hydraulics Experiment for Nuclear Application (ATHENA) as one of the facilities to address the pool of thermal-hydraulic challenges and demonstrate the feasibility of the revised ALFRED configuration, along with the thermal-hydraulic performances of its main components. ATHENA is a large pool-type lead-cooled multipurpose experimental facility featuring a large-sized vessel (3.2-m diameter and 10-m height), conceived to host almost 800 tons of lead to test ALFRED-relevant scaled components. The test section to be installed in the main vessel includes an electrically heated core simulator, made of seven fuel assemblies, which delivers to the primary coolant a nominal thermal power of 2210 kW; a main coolant pump for lead circulation; and a countercurrent shell-and-tube main heat exchanger, of which the tube bundle is fed by pressurized water by a dedicated secondary circuit. This work presents the numerical model of ATHENA along with thermal-hydraulic characterization of the facility using the system code RELAP5/Mod3.3, properly modified to include the thermophysical properties of heavy liquid metals. After the characterization of the steady state representative of the Stage 3 foreseen for the ALFRED staged approach, results of a numerical sensitivity analysis aimed at defining the most suitable procedure for the shutdown transient of the facility are presented. [ABSTRACT FROM AUTHOR]

Abstract Background The linkage of primary care, hospital and other health registry data is a global goal, and a consent-based approach is often used. Understanding the attitudes of why participants take part is important, yet little is known about reasons for non-participation. The ATHENA COVID-19 feasibility study investigated: 1) health outcomes of people diagnosed with COVID-19 in Queensland, Australia through primary care health data linkage using consent, and 2) created a cohort of patients willing to be re-contacted in future to participate in clinical trials. This report describes the characteristics of participants declining to participate and reasons for non-consent. Methods Patients diagnosed with COVID-19 from January 1st, 2020, to December 31st, 2020, were invited to consent to having their primary healthcare data extracted from their GP into a Queensland Health database and linked to other data sets for ethically approved research. Patients were also asked to consent to future recontact for participation in clinical trials. Outcome measures were proportions of patients consenting to data extraction, permission to recontact, and reason for consent decline. Results Nine hundred and ninety-five participants were approached and 842(85%) reached a consent decision. 581(69%), 615(73%) and 629(75%) consented to data extraction, recontact, or both, respectively. Mean (range) age of consenters and non-consenters were 50.6(22-77) and 46.1(22-77) years, respectively. Adjusting for age, gender and remoteness, older participants were more likely to consent than younger (aOR 1.02, 95%CI 1.01 to 1.03). The least socio-economically disadvantaged were more likely to consent than the most disadvantaged (aOR 2.20, 95% 1.33 to 3.64). There was no difference in consent proportions regarding gender or living in more remote regions. The main reasons for non-consent were ‘not interested in research’ (37%), ‘concerns about privacy’ (15%), ‘not registered with a GP’ (8%) and ‘too busy/no time’ (7%). ‘No reason’ was given in 20%. Conclusion Younger participants and the more socio-economically deprived are more likely to non-consent to primary care data linkage. Lack of patient interest in research, time required to participate and privacy concerns, were the most common reasons cited for non-consent. Future health care data linkage studies addressing these issues may prove helpful.

In the context of the ATHENA X-IFU Cryogenic AntiCoincidence detector (CryoAC) development, we have studied the thermalization properties of a 2 × 2 mm SQUID chip. The chip is glued on a front-end PCB and operated on the cold stage of a dilution refrigerator (TBASE < 20 mK). We performed thermal conductance measurements by using different materials to glue the SQUID chip on the PCB. These have been repeated in subsequent cryostat runs, to highlight degradation effects due to thermal cycles. Here, we present the results obtained by glues and greases widely used in cryogenic environments, i.e., GE 7031 Varnish Glue, Apiezon N Grease and Rubber Cement. [ABSTRACT FROM AUTHOR]

Copyright of Thiasos Monografie is the property of Edizioni Quasar di Severino Tognon s.r.l. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The symbol of the spider maintains its relevance as a component part of the symbol of communication in the 21st century, being under the www (World Wide Web) sign. The internet network has as its functional prototype the spider. It is the meaning of information transmission networks. I researched the symbol of the spider and its connotations in antiquity, in the lyrics of several Romanian writers: Lucian Blaga, Leonida Lari, Ion Hadârcă. I have tinted the image in cinematography. The article contains concepts from different fields: psychology, mythology, cinematography, philosophy, Romanian literature and comparative literature.

Impari Atena presents the verbal text of a musical theater performance on the myth of Apollo and Marsyas, which will be staged in Turin as part of the 2022 edition of Festa Europea della Musica. This reworking imagines that Euterpe, in protest against Apollo’s arbitrariness, calls for Athena’s intervention so that the musical competition can take place and the contestants have equal opportunities. But even the goddess of justice cannot judge equally, and so she remains silent. It will be Music who wins the challenge, and finds a way to reconcile the art of the god with that of the Sylen beyond all expectations.

Successfully attaining consensus in the absence of a centralized coordinator is a fundamental problem in distributed multi-agent systems. We analyze progress in the Synod consensus protocol—which does not assume a unique leader—under the assumptions of asynchronous communication and potential agent failures. We identify a set of sufficient conditions under which it is possible to guarantee that a set of agents will eventually attain consensus using Synod. First, a subset of the agents must not permanently fail or exhibit Byzantine failure until consensus is reached, and second, at least one proposal must be eventually uninterrupted by higher-numbered proposals. To formally reason about agent failures, we introduce a failure-aware actor model (FAM). Using FAM, we model the identified conditions and provide a formal proof of eventual progress in Synod. Our proof has been mechanically verified using the Athena proof assistant and, to the best of our knowledge, it is the first machine-checked proof of eventual progress in Synod. [ABSTRACT FROM AUTHOR]

Despite early imperial portenta being largely ignored in secondary literature, the reports of such incidents demand increased scholarly attention. This paper contends that decoding reports of portents from the early empire can give us fundamental insights into key moments of identity negotiation in this period. This paper will primarily focus on two such reports, signs of divine displeasure reported in Athens and in Camulodunum. This paper contends that within such reports we can glimpse complex and contested issues of identity creation and redefinition at intra-local, trans-local, and global levels. [ABSTRACT FROM AUTHOR]

This essay examines Carson’s The Trojan Women: A Comic, a 2021 translation of Euripides illustrated by Rosanna Bruno. Carson’s subtitle, through the intersection of classical and modern senses of “the comic” as a genre, demands that the reader ask of her book: What is the place of comedy in a comic about one of the bleakest plays in the Western canon? The comic elements of The Trojan Women reframe Euripides’ narrative and underscore, in a bitter irony, the disastrous impact on the Greeks of the reconciliation of the gods Athena and Poseidon. [ABSTRACT FROM AUTHOR]

The X-ray Integral Field Unit (X-IFU) is one of the two focal plane detectors of Athena, a large-class high energy astrophysics space mission approved by ESA in the Cosmic Vision 2015–2025 Science Program. The X-IFU consists of a large array of transition edge sensor micro-calorimeters that operate at ~100 mK inside a sophisticated cryostat. To prevent molecular contamination and to minimize photon shot noise on the sensitive X-IFU cryogenic detector array, a set of thermal filters (THFs) operating at different temperatures are needed. Since contamination already occurs below 300 K, the outer and more exposed THF must be kept at a higher temperature. To meet the low energy effective area requirements, the THFs are to be made of a thin polyimide film (45 nm) coated in aluminum (30 nm) and supported by a metallic mesh. Due to the small thickness and the low thermal conductance of the material, the membranes are prone to developing a radial temperature gradient due to radiative coupling with the environment. Considering the fragility of the membrane and the high reflectivity in IR energy domain, temperature measurements are difficult. In this work, a parametric numerical study is performed to retrieve the radial temperature profile of the larger and outer THF of the Athena X-IFU using a Finite Element Model approach. The effects on the radial temperature profile of different design parameters and boundary conditions are considered: (i) the mesh design and material, (ii) the plating material, (iii) the addition of a thick Y-cross applied over the mesh, (iv) an active heating heat flux injected on the center and (v) a Joule heating of the mesh. The outcomes of this study have guided the choice of the baseline strategy for the heating of the Athena X-IFU THFs, fulfilling the stringent thermal specifications of the instrument.

The enormously popular contemporary genre of televised police procedurals that feature a brilliant female detective reflects and reifies enduring misogynistic beliefs and attitudes that pervade the cultural fantasies and social mores of our time. In her current form, the prototypical female protagonist of these series adheres to a rigid, stereotypical formulation that limits her capacity for mature, healthy object relations. In particular, her singular devotion to her work badly compromises her maternal function: thus, she is either barren or a bad mother, as well as a bad partner, sister, or daughter. Moreover, her professional excellence is itself pathologized, as the very qualities that make her extraordinary are typically attributable to the quintessential misogynistic trope of mental illness or emotional instability. The Greek myth of the birth of Athena explicates the threat embodied by the brilliant female detective, who, as a revival of the infantile fantasy of the all‐powerful, all‐knowing mother, infringes on the generative capacity of the mind: territory that men have since antiquity claimed in order to guard against envy of female procreative power. In return, she must be divested of her uniquely female powers, "the curse of the thinking woman." [ABSTRACT FROM AUTHOR]

Sigmund Freud's escape from Austria at the end of his life, and his experiences during his last year in London, are explored. The two homes where Freud lived in London and Vienna are compared, and their unique characteristics examined. During Freud's final year at home in London he was busy and active, writing, seeing patients, receiving visitors, surrounded by family and friends, until his cancer was no longer treatable. Freud died at home in September 1939. Freud's legacy is preserved today in museums in both his homes, Berggasse 19 and 20 Maresfield Gardens. [ABSTRACT FROM AUTHOR]

In his second appearance to Aeneas in Aeneid 4 Mercury drives the hero to flee Carthage with a false allegation that Dido is planning an attack, capping his warning with an infamous sententia about the mutability of female emotion. Building on a previous suggestion that Mercury's first speech to Aeneas is modelled on Athena's admonishment of Telemachus at the opening of Odyssey 15, this article proposes that Mercury's second speech as well is modelled on Athena's warning, in which the goddess uses misdirection about Penelope's intentions and a misogynistic gnōmē about the changeability of women's affections to spur Telemachus' departure from Sparta. After setting out how Virgil divides his imitation of Athena's speech verbally and thematically between Mercury's two speeches, the discussion turns to why both Athena and Mercury adopt these deceptive tactics. The speeches are shown to be culminations of the poets' similar approaches to creating doubt and foreboding around the queens' famed capacities for using δόλος. Common features in the ensuing hasty departures of Telemachus and Aeneas further confirm Virgil's use of Odyssey 15 in devising Aeneas' escape from Carthage. [ABSTRACT FROM AUTHOR]

This article focuses on the interrelationship between two events taking place simultaneously in Odysseus' megaron : Phemius' performance and the conversation between Telemachus and Athena. I argue that at Hom. Od. 1.298–302 Athena, in her mention of Orestes' kleos , refers directly to Phemius' song that Telemachus can hear from where he is sitting. This reading sheds new light on the characters' receptions of Phemius' song. Between the well-known contrasting responses of the nearest and the farthest audiences – the suitors' silence and Penelope's over-reaction – stands Athena's cognitively constructive use of it, by which the goddess attempts to establish a shared understanding with Telemachus, whose kleos is one of the main concerns of her visit to Ithaca. [ABSTRACT FROM AUTHOR]

On the occasion of the victory in the Battle of the Eurymedon, an important episode of the Greco-Persian Wars in 469 BC. a monument was built in Delphi. The material remains of the monument have been lost, but there are mentions in the sources that link this monument with two military events: the battle of the Eurymedon and the Sicilian Expedition. The objectives of this article have been to know why this iconography was chosen, to understand its meaning within the war events that surrounded it. The method used has been the analysis of the original sources, paralleling with other similar monuments of the Greek world. As results, we can know quite accurately the appearance of the monument, as well as the intentionality with which it was built. Thus, we can conclude that it became the perfect symbol to celebrate the Battle of the Eurymedon. This warlike conflict that supposed the consolidation and victory of the League of Delos under the direction of Athens, and its hegemony in the Aegean Sea.

Notwithstanding her Kizzuwatnean origins, Maliya becomes part of the Bronze Age Hittite State Cult thanks to Queen Puduḫepa, who advocates a renovation of the dynastic cult. Therefore, Maliya and her temple became protagonists of the Hittite religious festivals. In the Iron Age, the goddess cult spreads to Western Anatolian milieus (Lycian and Lydian), developing apparent syncretic convergences with deities of the Aegean context. This paper investigates how Maliya and her Aegean counterparts converged, arguing and discussing the most debated positions. [ABSTRACT FROM AUTHOR]

Athena (advanced telescope for high-energy astrophysics) is an ESA large-class mission, at present under a re-definition “design-to-cost” phase, planned for a prospective launch at L1 orbit in the second half of the 2030s. It will be an observatory alternatively focusing on two complementary instruments: the X-IFU (X-ray Integral Field Unit), a TES (TransitionEdge Sensor)-based kilo-pixel array which is able to perform simultaneous high-grade energy spectroscopy (~3 eV@7 keV) and imaging over 4′ FoV (field of view), and the WFI (Wide Field Imager), which has good energy spectral resolution (~170 eV@7 keV) and imaging on wide 40′ × 40′ FoV. Athena will be a truly transformational observatory, operating in conjunction with other large observatories across the electromagnetic spectrum available in the 2030s like ALMA, ELT, JWST, SKA, CTA, etc., and in multi-messenger synergies with facilities like LIGO A+, Advanced Virgo+, LISA, IceCube and KM3NeT. The Italian team is involved in both instruments. It has the co-PIship of the cryogenic instrument for which it has to deliver the TES-based Cryogenic AntiCoincidence detector (CryoAC) necessary to guarantee the X-IFU sensitivity, degraded by a primary particle background of both solar and galactic cosmic ray (GCR) origins, and by secondary electrons produced by primaries interacting with the materials surrounding the main detector. The outcome of Geant4 studies shows the necessity for adopting both active and passive techniques to guarantee the residual particle background at 5 × 10−3 cts cm−2 s−1 keV−1 level in 2–10 keV scientific bandwidth. The CryoAC is a four-pixel detector made of Si-suspended absorbers sensed by Ir/Au TESes placed at

We present the instrument simulator xifusim developed for the X-ray Integral Field Unit X-IFU aboard the planned Athena mission. xifusim aims to be an accurate representation of the entire instrument, starting from a full simulation of the Transition-Edge Sensor (TES) array receiving impact photons unconstrained by the small signal limit. Its output current is then propagated through the entire readout chain, including multiplexing, amplification and the digital readout. The final output consists of triggered records, which can be post-processed to reconstruct the photon energies. The readout chain itself is separated into individual, modular blocks with several possible models for each, allowing the simulation of different readout schemes or models of varying physical accuracy at the expense of run time. New models are implemented as necessary to enable studies of the overall readout chain. Such studies are also facilitated by fine-grained control of the simulation output, including the internal state of intermediate simulation blocks. In addition to its modularity, xifusim also allows the manipulation of certain internal parameters during a run, enabling the simulation of readout chain characterization measurements, environmental drifts or various kinds of crosstalk. [ABSTRACT FROM AUTHOR]

We report measured T c of superconducting Ti/Au bilayer strips with a width W varying from 5 to 50 µm. The strips were fabricated based on a Ti/Au bilayer that consists of a 41-nm-thick Ti layer to which a 280-nm-thick Au layer was added. We find that the T c drops as W decreases and the declining trend almost perfectly follows T c / [ mK ] = - 738.4 [ μ m ] 2 / W 2 + 91.0 , where T c (W = ∞) of 91 mK is consistent with the intrinsic T c of the bilayer. The result is interpreted as a consequence of the lateral inverse proximity effect originated in normal-metal microstructures, namely Au overhangs that exist at the edges of the Ti/Au bilayer. The T c shift from the intrinsic T c should be anticipated in addition to the longitudinal proximity effect from superconducting Nb leads when one designs Ti/Au TESs. [ABSTRACT FROM AUTHOR]

Copyright of Academic Journal of Philosophy / Felsefi Düşün is the property of Pinhan Yayincilik and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper we explore the scientific synergies between Athena and some of the key multi-messenger facilities that should be operative concurrently with Athena. These facilities include LIGO A+, Advanced Virgo+ and future detectors for ground-based observation of gravitational waves (GW), LISA for space-based observations of GW, IceCube and KM3NeT for neutrino observations, and CTA for very high energy observations. These science themes encompass pressing issues in astrophysics, cosmology and fundamental physics such as: the central engine and jet physics in compact binary mergers, accretion processes and jet physics in Super-Massive Binary Black Holes (SMBBHs) and in compact stellar binaries, the equation of state of neutron stars, cosmic accelerators and the origin of Cosmic Rays (CRs), the origin of intermediate and high-Z elements in the Universe, the Cosmic distance scale and tests of General Relativity and the Standard Model. Observational strategies for implementing the identified science topics are also discussed. A significant part of the sources targeted by multi-messenger facilities is of transient nature. We have thus also discussed the synergy of Athena with wide-field high-energy facilities, taking THESEUS as a case study for transient discovery. This discussion covers all the Athena science goals that rely on follow-up observations of high-energy transients identified by external observatories, and includes also topics that are not based on multi-messenger observations, such as the search for missing baryons or the observation of early star populations and metal enrichment at the cosmic dawn with Gamma-Ray Bursts (GRBs). [ABSTRACT FROM AUTHOR]

Copyright of Ámbitos: Revista de Estudios de Ciencias Sociales y Humanidades is the property of Asociacion de Estudios de Ciencias Sociales y Humanidades and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

• An overview of the ATHENA experimental facility is provided. • A numerical model of ATHENA has been realized with RELAP5/Mod3.3, properly modified to include heavy liquid metals. • A Loss-Of-Heat-Sink transient has been simulated with RELAP5/Mod3.3. • A sensitivity analysis on the Main Heat Exchanger outlet temperature set point for the shutdown has been performed. ATHENA (Advanced Thermal-Hydraulic Experiment for Nuclear Applications) is a large multipurpose pool-type lead-cooled facility under construction at the Mioveni site in Romania. It has been identified by the FALCON (Fostering ALfred CONstruction) Consortium to characterize large to full-scale ALFRED components, to conduct integral tests, and to investigate the main thermal–hydraulic phenomena inherent in pool-type systems. ATHENA is representative of ALFRED in terms of the difference in height of the thermal barycenters of the heat source and heat sink, i.e., 3.3 m, in order to reproduce the buoyancy forces in the system. Similar to ALFRED's design, ATHENA minimizes thermal stratification within the main vessel even under natural circulation conditions, through an internal structure referred to as "barrel". This structure directs the fluid flow towards the main vessel, preventing fluid stagnation near the vessel itself. The paper initially provides a steady-state thermal–hydraulic characterization of the facility, including details of the numerical model developed using the RELAP5/Mod3.3 thermal–hydraulic code. Then, focus is given to the transient analysis considering as a reference scenario a Loss-of-Heat-Sink (LOHS) accidental transient. In this scenario, the Main Circulation Pump (MCP) is assumed to remain operational while the Core Simulator (CS) is deactivated once the lead temperature at the Main Heat Exchanger (MHX) outlet reaches a predefined threshold. A sensitivity analysis is conducted with set points of 430 °C, 450 °C, 470 °C, and 490 °C, assessing the system's response following MHX isolation from the secondary loop. The study evaluates the impact of different CS deactivation set points on reactor SCRAM delay (reducing CS power to a level representative of decay heat) as well as on system maximum and minimum temperatures. [ABSTRACT FROM AUTHOR]

Facilitated by public administrations and the European Union, higher education institutions should support their teachers so they develop the skills for online and other forms of teaching and learning opened up by the digital era and should exploit the opportunities presented by technology to improve the quality of teaching and learning. The article focuses on new European Union grant programs that empower the increasing of digital literacy in the higher education area, developing cooperation, and overcoming challenges during the coronavirus pandemic. This initiative can empower a new European University and support an international project aimed at certification of professional educators with the participation of a Russian partner.

Neste artigo o autor chama atenção para a pertinente atualidade das observações críticas de Pierre Hourcade sobre a poesia de Alberto Caeiro, destacando entre outros aspetos a ética e a estética que em seu entender dominam esta obra maior de Caeiro. Uma das mais enigmáticas da produção poética de Fernando Pessoa e heterónimos.

At the beginning of book 7 of the Odyssey, Athena appears to Odysseus in the form of young girl to instruct him about the Phaeacians. Then, apparently for no reason, she departs for the "house" of Erechtheus on the Athenian Acropolis. I suggest that Athena's destination symbolically reflects the state of affairs between Athena and Odysseus, on the one hand, and Poseidon, on the other. Athena's passing by Marathon in this context symbolizes her entering her sacred land Attica from the north. [ABSTRACT FROM AUTHOR]

In Greek polytheism, choosing the name of the divinity is a fundamental step in any interaction between humans and non-humans. If, for a large number of deities, it is in relation to the adjective which will complete the deity’s name, it happens that, for certain deities, the theonym is itself the object of this choice. Athena is a striking example of this. The goddess has indeed another name, “Pallas”, which is attested in Homeric epics. This paper will focus on the place of the name “Pallas” among the profusion of designations of the goddess Athena. For this purpose, we will analyse the uses of Athena’s “other name” in the various Athenian textual documents, both epigraphic and literary.