פרסומים

The utilization of photoelectrochemical cells (PEC) for converting solar energy into fuels (e.g., hydrogen) is a promising method for sustainable energy generation. We demonstrate a strategy to enhance the performance of PEC devices by integrating surface-functionalized zinc selenide (ZnSe) semiconductor nanocrystals (NCs) into porous polymeric carbon nitride (CN) matrices to form a uniformly distributed blend of NCs within the CN layer via electrophoretic deposition (EPD). The achieved type II heterojunction at the CN/NC interface exhibits intimate contact between the NCs and the CN backbone since it does not contain insulating binders. This configuration promotes efficient charge separation and suppresses carrier recombination. The reported CN/NC composite structure serves as a photoanode, demonstrating a photocurrent density of 160 ± 8 μA cm–2 at 1.23 V vs a reversible hydrogen electrode (RHE), 75% higher compared with a CN-based photoelectrode, for approximately 12 h. Spectral and photoelectrochemical analyses reveal extended photoresponse, reduced charge recombination, and successful charge transfer at the formed heterojunction; these properties result in enhanced PEC oxygen production activity with a Faradaic efficiency of 87%. The methodology allows the integration of high-quality colloidal NCs within porous CN-based photoelectrodes and provides numerous knobs for tuning the functionality of the composite systems, thus showing promise for achieving enhanced solar fuel production using PEC.

Faulkner’s The Sound and the Fury attempts to represent first-person experience in a radical fashion. In what I call (paradoxically) “free indirect discourse in the first person,” Faulkner ostensibly presents both thought thought and thought below the level of awareness together in one stream of text. The Quentin section in particular relies on an idealistic picture of language as meaningful in itself, apart from any intersubjective context or significant use, as though we could bypass communication and look inside Quentin’s head, finding not the brain but the “exact language” of his conscious life. I consider this temptation by way of Wittgenstein’s critique of the privacy of the mental. Wittgenstein’s aim, I argue, is not to deny or demote interiority, but rather to impugn a certain picture of how “the inner” must look — a realm composed of private objects to which the “I” alone has access. I thus suggest that we think of Quentin as an experiment, an appeal. Faulkner tries to reveal a mind in the brutal fullness of its suffering without forcing that mind to address us: to tell us that they suffer. I contend that this appeal fails, and in failing reveals the manner in which the (not-so-private) mind is essentially embedded in a shared, intersubjective world.

 

August 2023: Daniel Schwartz is a PhD student in English at Brandeis University. His work examines the breakdown of mimesis in modernist literature.

 

 

This paper examines the phenomenon of recurring names on Judahite private jar-handle impressions. The large number of recurring names in this corpus has been noted as early as 1941 by David Diringer, who proposed that many stamp-bearers belonged to the same family. This phenomenon has rarely been discussed in subsequent literature, however. I offer a new statistical analysis, showing that the high recurrence of names among the private stamps cannot be due to mere chance and should rather be explained in terms of genealogical relations. These relations span at least two generations and involve between 30% and 60% of the stamp bearers. These results have two main implications. First, they vindicate Diringer’s intuitions about the importance and genealogical nature of recurring names among the jar-handle impressions. Second, they suggest that the private jar-handles phenomenon probably had a longer time span than often assumed, lasting several decades rather than a handful of years before the Assyrian invasion of 701 BCE.

While the world population is steadily growing, the demand for plant-based protein in general, and chickpea in particular, is rising. Heatwaves and terminal droughts are the main environmental constraints on chickpea production worldwide. Thus, developing better irrigation management for the chickpea agro-system can promote higher and more sustainable yields. Strategic supplemental irrigation can dramatically increase yield when applied at the right time and in appropriate quantities. Here, we studied the response of a modern Kabuli chickpea cultivar to supplemental irrigation during the critical pod-filling period over three growing seasons (2019–2021) in northern Negev, Israel, under semi-arid conditions. Six irrigation treatments were applied based on irrigation factors of 0, 0.5, 0.7, 1.0, 1.2, and 1.4 of evapotranspiration (ET0), as measured by an on-site meteorological station. Morpho-physiological parameters and above-ground biomass accumulation were monitored throughout the cropping seasons, and the final grain yield was determined at maturation. Irrigation initiation was guided by the plants' leaf water potential (ΨLWP > 15 bar) in the field. Our results indicate that the optimal water status (as reflected by pressure chamber values) was 12–14 bar during the irrigation period. Furthermore, adhering to an irrigation strategy based on evapotranspiration with an irrigation factor of 1.2 resulted in the highest grain yields over the three-year study period. To ensure an optimal water supply during the reproductive phase compatible with the crop water requirements, maintaining a 25 mm node length above the last fully developed pod and a 90 mm distance between the last fully developed pod to the stem apex is recommended. In conclusion, initiating irrigation when the crop is already at mild drought stress, followed by sufficient irrigation while following the indicated morphology and water potential values, may help farmers optimize irrigation and maximize chickpea crop production.

OBJECTIVE: Epidemiological studies highlight an association between pancreatic ductal adenocarcinoma (PDAC) and oral carriage of the anaerobic bacterium , a species highly linked to periodontal disease. We analysed the potential for to promote pancreatic cancer development in an animal model and probed underlying mechanisms.

DESIGN: We tracked bacterial translocation from the oral cavity to the pancreas following administration to mice. To dissect the role of in PDAC development, we administered bacteria to a genetically engineered mouse PDAC model consisting of inducible acinar cell expression of mutant ( /LSL-G12D; Ptf1a-CreER, iKC mice). These mice were used to study the cooperative effects of mutation and on the progression of pancreatic intraepithelial neoplasia (PanIN) to PDAC. The direct effects of on acinar cells and PDAC cell lines were studied in vitro.

RESULTS: migrated from the oral cavity to the pancreas in mice and can be detected in human PanIN lesions. Repetitive administration to wild-type mice induced pancreatic acinar-to-ductal metaplasia (ADM), and altered the composition of the intrapancreatic microbiome. In iKC mice, accelerated PanIN to PDAC progression. In vitro, infection induced acinar cell ADM markers SOX9 and CK19, and intracellular bacteria protected PDAC cells from reactive oxygen species-mediated cell death resulting from nutrient stress.

CONCLUSION: Taken together, our findings demonstrate a causal role for in pancreatic cancer development in mice.

This is a commented translation accompanied by the original Greek of The Elements of Theology (Stoicheiosis Theologike) by Proclus (412–485 c.e.), a central work in Western metaphysics. This pioneering translation of Proclus into Portuguese makes his thought accessible to a broad audience interested in metaphysical questions, and not only to specialists in ancient philosophy. The commentary analyzes Proclus’s arguments, highlighting his original polytheistic metaphysics, and underscores the incomplete nature of the Elements, pointing out gaps and structural flaws, while also suggesting possible solutions.  

With growing numbers of forcibly displaced people and their tendency to spatially cluster, destination countries around the world consider dispersing them over their territory. While the egocentric not-in-my-back-yard syndrome (NIMBYism) predicts that dispersion will spark a public backlash, sociotropic considerations and appeals to civic fairness predict the contrary. I theorise that the institutional set-up determines which force prevails. Although the local proximity of refugees triggers public opposition, it can be substantially countered by tighter regulation on refugee dispersion. Setting clear guiding rules, such as an upper limit or proportional allocation can enhance both burden-sharing in the accommodation of refugees and public support for their incorporation. Evidence from survey experiments conducted in Norway and Israel supports these theoretical accounts. The findings have implications for understanding how countries can mitigate public backlash against immigrants and refugees while maintaining their admission and integration.

Archaeological and palaeoenvironmental evidence from the Armenian Highlands and wider southern Caucasus region emphasises the significance of Marine Oxygen Isotope Stage 3 (c. 57–29 ka) as a crucial period for understanding hominin behaviours amidst environmental fluctuations. Ararat-1 cave, situated in the Ararat Depression, Republic of Armenia, presents potential for resolving emerging key debates regarding hominin land use adaptations during this interval, due to its well-preserved lithic artefacts and faunal assemblages. We present the first results of combined sedimentological, geochronological (luminescence and radiocarbon), archaeological and palaeoecological (macrofauna, microfauna and microcharcoal) study of the Ararat-1 sequence. We demonstrate sediment accumulation occurred between 52 and 35 ka and was caused by a combination of aeolian activity, cave rockfall and water action. Whilst the upper strata of the Ararat-1 sequence experienced post-depositional disturbance due to faunal and anthropogenic processes, the lower strata remain relatively undisturbed. We suggest that during a stable period within MIS 3, Ararat-1 was inhabited by Middle Palaeolithic hominins amidst a mosaic of semi-arid shrub, grassland, and temperate woodland ecosystems. These hominins utilised local and distant toolstone raw materials, indicating their ability to adapt to diverse ecological and elevation gradients. Through comparison of Ararat-1 with other sequences in the region, we highlight the spatial variability of MIS 3 environments and its on hominin land use adaptations. This demonstrates the importance of the Armenian Highlands for understanding regional MP settlement dynamics during a critical period of hominin dispersals and evolution.

Why, despite increased female support, do social democratic parties (SDPs) in most Western European countries face electoral decline? To study this puzzle, we harness a well-documented regularity – diminishing support for SDPs by manual workers and their increased support for the far right. We contend that this trend is intensified in contexts where the economic positions of SDPs align with market-oriented policies or converge with those of the far right. Additionally, as men are disproportionately represented among manual workers, this shift contributes to the reversal of the gender gap in support for SDPs. Drawing on public opinion data from 18 countries spanning 46 years, along with labor and party position data, our findings substantiate this argument.