Present Day Research Articles

Contourite-like deposits suggest stronger-than-present circulation in the Plio-Pleistocene Red Sea

Red Sea Deep Water is presently slow-moving, but was this true of the earlier Plio-Pleistocene (PP)? In seismic reflection records, the PP deposits are distorted by halokinetic deformation of their underlying Miocene evaporites. However, if reflections are flattened to a prominent reflector representing the top of the Miocene, they reveal mounded deposits within the earlier PP along both sides of the sea. Off Egypt, a plastered drift occurs along a salt wall. In the central Red Sea, they are mounded drifts. Seismic reflections from these deposits change shape gradually upwards to the modern seabed, which is commonly flatter, suggesting a gradual change in depositional conditions. To explain their origins, we appeal to other evidence. DSDP cores from the Late Pleistocene contain the rigid aragonite cements formed by restricted conditions, but not the lower and middle PP. Furthermore, mid-PP sedimentary δ18O values are similar to global ocean δ18O for that time, not enhanced as expected from excess evaporation. These data suggest that there was a greater exchange of Red Sea waters with the Indian Ocean during the mid-PP. That exchange may have allowed waters densified by evaporation in shallow regions of the northern Red Sea to flow south vigorously (the mounds would then be contourites). Alternatively, as the Pliocene seabed was shallower, wind-driven eddies may have affected more of the water column. Overall, the results indicate for the first time that deep circulation was stronger in the earlier PP compared with the present day. That circulation needs to be considered when evaluating organism dispersions across the Red Sea, regional climate, and influence of Red Sea Outflow Water on Indian Ocean Intermediate Water. Plain language summaryDuring the Pliocene (about 3–5 million years ago), temperatures on Earth's surface were similar to those predicted in some models of Earth's future climate. This has led to researchers becoming interested in studying geological evidence of conditions during the Pliocene as a clue to Earth's future. In detail, however, the comparison may not be exact. In our article, we describe mounds of sediment that were originally formed on the bed of the Red Sea in the Pliocene. They appear similar to snow drifts, and like snow drifts, may have formed under steady currents. Sea water becomes dense with evaporation (making it more saline). At the present day, dense water created in the Gulf of Suez cascades down into the deep Red Sea as a slow current. Perhaps such movements were more vigorous in the Pliocene, helped by the water escaping through a deeper barrier in the south into the Indian Ocean? Alternatively, these mounds were formed by giant eddies, such as those on the surface of the modern Red Sea, which are moved by strong winds. In either case, the deep waters of the Pliocene Pliocene Red Sea were more vigorously moving compared to the quiescent deep waters of the modern-day.

Impact of Cosmic Rays on Radiation Exposures and Scientific Activities at the Atacama Large Millimeter/Submillimeter Array (ALMA) Sites.

This study delves into the investigation of cosmic-ray radiation exposure levels for workers and their impact on the signal correlation subsystems at the Atacama Large Millimeter/submillimeter Array (ALMA) observatory sites. The analysis presents a detailed examination of secondary cosmic ray spectra and flux at the ALMA sites, encompassing the operational period from 2010 to the present day, with a particular focus on the consequences of extreme solar flares. In terms of radiation exposure for ALMA employees, the annual exposure at the highest site (AOS) reaches approximately 4.8 mSv. This value exceeds the exposure level of a typical nuclear fuel cycle worker or those working at high-altitude Antarctica stations. The exposure is approximately 2.7 times lower at the ALMA Operations Support Facility (OSF). Furthermore, the additional ambient dose equivalent resulting from solar events, while low for events similar to those observed since the 1950s, can reach up to approximately 1 mSv when considering more ancient solar events based on environmental archives. Our analysis includes radiation effects measurements in the Baseline Correlator at the AOS and, more generally, underscores the significance of employing accurate modeling and simulation techniques to assess the effects of galactic cosmic rays and extreme solar events on the integrated circuits utilized or planned in the ALMA correlation subsystem.

Preambulum az idegenjogi szakigazgatás rendszerében

Aim: The aim of this paper is to present - in addition to the preambles of the legislation on alien policy from 1903 to the present day - the preamble of Act XC of 2023 on the General Rules for the Entry and Residence of Third-Country Nationals. Methodology: This study considers the practice of the specifications of the preambles of the legislations on the entry and residence of foreigners, and compares, according to grammatical and logical criteria, the certain sentences of the introductory text of Act XC of 2023 on the General Rules for the Entry and Residence of Third-Country Nationals with the normative provisions of this Act and other legislations, in particular the Fundamental Law of Hungary. Findings: The preamble of Act XC of 2023 on the General Rules for the Entry and Residence of Third-Country Nationals introduces the normative provisions of the Act with an unusual content compared to the legislation so far. This content cannot, however, be examined in isolation, but only in the light of the specific legal provisions (constitutional, statutory, regulatory) establishing rights and obligations. Value: The value of the study is to draw attention to the fact that in the system of legislation, only the specific provisions of individual pieces of legislation have normative force, and that the texts and preambles introducing individual pieces of legislation can contribute to the interpretation of these legislative provisions.

Changes in South American surface ozone trends: exploring the influences of precursors and extreme events

Abstract. In this study, trends of 21st-century ground-level ozone and ozone precursors were examined across South America, a less-studied region where trend estimates have rarely been comprehensively addressed. Therefore, we provided an updated regional analysis based on validated surface observations. We tested the hypothesis that the recent increasing ozone trends, mostly in urban environments, resulted from intense wildfires driven by extreme meteorological events impacting cities where preexisting volatile organic compound (VOC)-limited regimes dominate. We applied the quantile regression method based on monthly anomalies to estimate trends, quantify their uncertainties and detect trend change points. Additionally, the maximum daily 8 h average (MDA8) and peak-season metrics were used to assess short- and long-term exposure levels, respectively, for the present day (2017–2021). Our results showed lower levels in tropical cities (Bogotá and Quito), varying between 39 and 43 nmol mol−1 for short-term exposure and between 26 and 27 nmol mol−1 for long-term exposure. In contrast, ozone mixing ratios were higher in extratropical cities (Santiago and São Paulo), with a short-term exposure level of 61 nmol mol−1 and long-term exposure levels varying between 40 and 41 nmol mol−1. Santiago (since 2017) and São Paulo (since 2008) exhibited positive trends of 0.6 and 0.3 nmol mol−1 yr−1, respectively, with very high certainty. We attributed these upward trends, or no evidence of variation, such as in Bogotá and Quito, to a well-established VOC-limited regime. However, we attributed the greater increase in the extreme percentile trends (≥ 90th) to heat waves and, in the case of southwestern South America, to wildfires associated with extreme meteorological events.

Protocolized Gastrointestinal Fistula Management is Superior to Historic Data and National Averages: A Retrospective Review of an Enterocutaneous Fistula Registry.

Background: Enterocutaneous fistula (ECF) management remains a complex clinical problem. Prehabilitation (prehab) protocols are becoming more popular. The prehabilitation protocol used in this paper was adopted in 2017 at the University of Florida. The Fistula Registry at University of Florida has captured the efforts of the UFAIR (University of Florida Abdominal Wall Reconstruction and Intestinal Rehab) service. We analyzed if the prehabilitation program is successful in reducing deaths, length of stay, recurrence of fistula, and readmissions to the hospital in our database.Methods: Charts were queried for patients with ECF/EAF from the UFAIR database from January 1, 2017, until present day. Several factors were recorded including: cause of fistula, recurrence of fistula, wound infection, postoperative sepsis, hospital length of stay, postoperative ICU length of stay, postoperative length of stay, death, discharge disposition, and if taken back to surgery.Results: 31 patients underwent prehabilitation while 30 patients underwent standard nutritional therapy. No deaths were reported in the prehab group, compared to 7 deaths in the standard group (P = .006). The prehab population had an average hospital stay of 15.19 days while the standard group had an average stay of 21.16 days (P = .045). 2/31 in the prehab protocol had a recurrence of ECF while 10/30 in the standard protocol recurred (P = .01). Conclusions: Our study showed promising data for the effects of prehabilitation protocol for patients with ECF. The outcomes of those in the prehab protocol surpassed historical outcomes. Our patients had no deaths, shorter hospital stays, and lower rates of recurrence.

Rare Earth Elements Distribution and Bacteriome to Assess and Characterize the Soil Landscapes of Old Olive Orchards

The presence of the olive tree in Tuscany, Italy, in its forms that have survived to the present day as an essential component of the landscape dates back many centuries. Global change is now threatening it. Therefore, it is important to find markers to enhance the olive tree environment in terms of its resilience. The aim of the research was to investigate the composition of soil bacteriomes in contrasting geochemical environments using a geochemistry approach based on the behavior of the REEs, inherited from parent rock material. Bacteriome assemblages and REE content were analyzed in 48 topsoils developed in six geochemical Tuscan environments. Combined geochemical, geoinformatic, and bioinformatic techniques highlighted the existence of four bacteriome assemblages depending on Light-REEs. Further results showed that the soil bioavailable fraction of REEs was related to parent rock materials, pH, and bacteriome composition. The most abundant bacteria were Microlunatus in graded fluvio-lacustrine soils, Gaiella in graded arenaceous soils, Bradyrizhobium in pyroclastic soils, and Rubrobacter in soils on gentle slopes of calcareous and carbonatic lithologies. This research represents a starting point to define new indicators able to assess the resilience of the olive trees in the Mediterranean landscape and characterize the territory of extra virgin olive oils.

The Portuguese customary electoral constitution: the election of representatives to the ancient cortes

ABSTRACT The historic Portuguese Constitution guaranteed the electoral autonomy of the municipalities as part of the prerogatives and freedoms that the monarch swore to respect at the beginning of each reign. Thus, the election of representatives to the old cortes (parliament) was based on traditional, unwritten conventions and practices. The lack of general legislation gave rise to a customary or unwritten electoral constitution, in the true sense of the word. This article deals with the electoral basis that each municipality formed to elect its representatives each time the cortes were convened, based on the king’s letters of convocation and the municipal electoral minutes that have survived to the present day.

Hydrological Regime of Rivers in the Periglacial Zone of the East European Plain in the Late MIS 2

At the end of the Pleniglacial and the first half of the Late Glacial period, approximately between 18 and 14 ka BP, rivers of the central and southern parts of the East European Plain had channels up to 10 times as large as the present day channels of the same rivers. These ancient channels, called large meandering palaeochannels, are widespread in river floodplains and low terraces. The hydrological regime of these large rivers is of great interest in terms of the palaeoclimatology of the late Marine Isotope Stage 2 (MIS 2). In this study, we aimed at quantitative estimation of maximum flood discharges of rivers in the Dnepr, Don and Volga basins in the late MIS 2. To approach this, we used massive measurements of the morphometric characteristics of large palaeochannels on topographic maps and remote sensing data—palaeochannel width, meander wavelength and their relationships with river flow parameters. The runoff depth of the maximum flood, which corresponds to the maximum depth of daily snow thaw during the snowmelt period, was obtained for unit basins with an area of <1000 km2. The mean value for the southern megaslope of the East European Plain was 44.2 mm/day (6 times the modern value), with 46 mm/day for the Volga River (5.5 times), 45 mm/day (6.3 times) for the Don River and 39 mm/day (8 times the modern value) for the Dnepr River basins. In general, the Dnepr basin was drier than the Don and Volga basins, which corresponds well to the modern distribution of humidity. At the same time, the westernmost part of the Dnepr River basin was relatively wet in the past, and the decrease in humidity from the past to the modern situation was greater there than in the eastern and central regions. The obtained results contradict the prevailing ideas, based mainly on climatic modeling and palynological data, that the climate of Europe was cold and dry during MIS 2. The reason is that palaeoclimatic reconstructions were made predominantly for the LGM epoch (23–20 ka BP). On the East European Plain, the interval 18–14 ka BP is rather poorly studied. Our results of paleoclimatological and palaeohydrological reconstructions showed that the Late Pleniglacial and the first half of the Late Glacial period was characterized by a dramatic increase in precipitation and river discharge relative to the present day.

A 47,000 year archaeological and palaeoenvironmental record from Juukan 2 rockshelter on the western Hamersley Plateau of the Pilbara region, Western Australia

Archaeological and palaeoenvironmental investigations at Juukan 2 rockshelter have yielded new information on the ancient Aboriginal occupation of the Pilbara uplands in northwest Australia. Using multiple lines of evidence, including lithic, faunal, pollen, ancient DNA, radiocarbon dating, optically stimulated luminescence, and Bayesian chronological modelling, we show that Aboriginal people occupied the western Hamersley Plateau as early as 47,000 years ago (47 ka). Late Pleistocene populations utilised a diverse range of tool technologies, including bone points, grindstones, and flaked stone artefacts. Palaeoclimatic conditions at Juukan 2 rockshelter varied greatly over the past 47 ka, with repeated site visits by people, including during the peak hyper-arid phase of the Last Glacial Maximum (LGM) c. 21 ± 2 ka. Ancient starch analyses of the ground stone artefacts show the processing of Ipomoea (Bush Potato) from around 42 ka to the present day. Pronounced increases in the discard of stone artefacts and bone in the last 3500 years are interpreted to be the result of increased frequency of site use. A braided hair fragment dated to this period has demonstrated genetic links between the earlier rockshelter occupants and contemporary Puutu Kunti Kurrama and Pinikura peoples, who have maintained strong cultural connections to the area.

The History of US Menstrual Health, School Nurses, and the Future of Menstrual Health Equity.

In the United States, adolescents suffer from inadequate menstrual health, meaning that adolescents are unprepared for menarche, lack the practical resources they need to comfortably and confidently manage menstruation, and receive inadequate health education and care for menstrual pain and disorders. In this article, we provide a historical analysis of the role of school nurses in addressing menstruation from the early 20th century up to the present day. We contextualize the current realities of school nursing and menstrual health education and clinical support. We argue that the decentralized US school system, a cultural aversion to open discussion about menstruation, and the outsized influence of commercial menstrual product manufacturers have hampered the ability of school nurses to deliver menstrual health education along with menstrual health support. Finally, we discuss implications for today's schooling experiences as well as recommendations for how to support school nurses in aligning our national approach to menstrual health toward the public health perspective of menstrual equity. (Am J Public Health. Published online ahead of print July 18, 2024:e1-e6. https://doi.org/10.2105/AJPH.2024.307705).

EGO to ECO: Tracing the History of Radioecology from the 1950s to the Present Day.

This paper starts with a brief history of the birth of the field of radioecology during the Cold War with a focus on US activity. We review the establishment of the international system for radiation protection and the science underlying the guidelines. We then discuss the famous ICRP 60 statement that if "Man" is protected, so is everything else and show how this led to a focus in radioecology on pathways to "Man" rather than concern about impacts on environments or ecosystems. We then review the contributions of Radiation Research Society members and papers published in Radiation Research which contributed to the knowledge base about effects on non-human species. These fed into international databases and computer-based tools such as ERICA and ResRad Biota to guide regulators. We then examine the origins of the concern that ICRP 60 is not sufficient to protect ecosystems and discuss the establishment of ICRP Committee 5 and its recommendations to establish reference animals and plants. The review finishes with current concerns that reference animals and plants (RAPs) are not sufficient to protect ecosystems, given the complexity of interacting factors such as the climate emergency and discusses the efforts of ICRP, the International Union of Radioecologists and other bodies to capture the concepts of ecosystem services and ecosystem complexity modelling in radioecology.

Enodiplomacia no governo de Rosas (1829-1852)

The role of wine during the Rosas government in the Argentine Confederation (1829-1852) is examined, within the framework of tense foreign relations, particularly due to the Anglo-French blockade and civil wars, which severely affected the traditional Argentine wine culture. It threatened its disappearance, as occurred in other former Latin American enopoles such as Peru and Mexico. It is detected that the need to export their wines was one of the motives for France’s imperialist policy in the La Plata basin. Likewise, wine was important for Rosas as part of his oenodiplomacy strategy. It is discovered that this strategy contributed to Rosas' successful foreign policy concerning the Great Powers of Europe while at the same time serving to keep the wine culture alive in Argentina and generate the conditions for the subsequent takeoff of the national wine industry. In a way, Rosas’ strategy preserved the wine culture in Argentina, avoiding what happened in other great Latin American wineries such as Mexico and Peru, a tradition that has remained alive to the present day.

The development history and future prospects of artificial intelligence in facial recognition technology

In recent decades, with the fast development of various algorithms and the rapid improvement of computer hardware performance, the development of facial recognition technology has been very rapid. This technology used to only appear in science fiction movies, but now it has been widely used in mobile payments, identity recognition, and other fields, and it also has very reliable performance. This article introduces the different facial recognition methods used in different periods of facial recognition technology from the 1960s and 1970s to the present day, to help people understand the development process of facial recognition technology. Among them, the focus is on early methods based on geometric features, grayscale information, and feature extraction, as well as recent applications based on deep learning and convolutional neural networks. In response to some challenges faced by current technology, some speculations on possible future development directions are proposed.

Accessibility of video games in the context of disability. A historical overview

This article briefly presents the history of making video games “accessible” to people with disabilities almost from the beginning of the medium to the present day. It outlines the conditions that influence the current state of accessibility in games, as well as the main issues that have emerged in the discourse on this issue. It also discusses some of the accessibility solutions developed by the video game industry and advocacy organisations.

Antiarrhythmic drugs in the present day

Cardiac arrhythmias cause asignificant proportion of hospitalizations and physician contacts worldwide. By using antiarrhythmic drugs, cardiac arrhythmias can be effectively treated and the frequency of recurrences reduced. Atrial fibrillation and heart failure represent diseases in which antiarrhythmic drugs are more often used on along-term basis. The aim of this article is to provide an overview of the most common antiarrhythmic drugs and their uses as well as to provide recommendations for adequate handling and use, especially in the outpatient setting. In addition to long-term use, some antiarrhythmic drugs are also administered for the acute management of supraventricular or ventricular tachycardia. Relevant contraindications, side effects and interactions must be considered, meaning that patients should be followed up when using these potent drugs. This article shows in detail what to consider when using antiarrhythmic drugs in order to ensure not only effective but also safe treatment.

The role of manuscript Editing And its Impact on the development of Arabic Sciences:A Gloss on the Summary of Meanings by Muhammad ibn Mansour al-Shafshawni as a model”

This study aims to identify the rôle of manuscrit vérification in the development of Arabic sciences, particularly rhetoric and grammar. By examining valuable heritage books such as "Sharh Qatr Al-Nada wa-Ball Al-Sada" by Jamal al-Din Ibn Hisham al-Ansari, verified by Muhyi al-Din Abdul Hamid, "Mukhtasar al-Ma'ani" verified by Maher Muhammad Adnan Othman, and "Hashiya ala Mukhtasar al-Ma'ani" by Muhammad bin Mansour al-Shafshawni, we discovered their immense scientific value from their creation to the present day. These works represent the meticulous efforts of scholars in transmitting knowledge and beauty across generations, forming a bridge between the past and present. Their significance has ensured their fame and numerous annotations and commentaries. Our study reveals that verifying these manuscripts has opened vast horizons for researchers, reinforcing the Arab nation's role in human civilization and facilitating linguistic and rhetorical studies for beginners. It has also highlighted Arab contributions to modern scientific theories in fields such as new linguistics and jurisprudence. Heritage books still require further study to uncover their hidden treasures. Their commentaries and rhetorical writings remain a fertile ground for research, demanding modern scientific approaches to revive this heritage with a new spirit. Keywords: Manuscripts, Verification, Heritage, Arabic Sciences.

Development and validation of a mental hyperactivity questionnaire for the evaluation of chronic stress in higher education

BackgroundExamination and understanding of neural hyperactivity are some of the greatest scientific challenges faced in the present day. For this reason, the present study aimed to examine this phenomenon in the context of higher education.MethodLikewise, this work will enable an instrument to be created to appropriately and reliably estimate neural hyperactivity associated with chronic stress in university students undertaking a Physiotherapy degree.ResultsAnalysis of content validity was carried out according to agreement and consensus between nineteen experts with Education Science or Psychology degrees, via the Delphi method. On the other hand, face validity was established by administering the questionnaire to a sample of 194 university students aged between 18 and 45 years (M = 30.48%; SD = 13.152).ConclusionThe final self-report measure, denominated mental hyperactivity, was composed of 10 items which showed adequate fit with regards to face and content validity (α = 0.775). Confirmatory factor analysis confirmed that the questionnaire was unidimensional.

Towards a Holistic Buddhist Eco-Ethics

The debate on Buddhist eco-ethics emerged in the late 20th century and continues to the present day, which fosters the intersection of Buddhist eco-ethics with environmental ethics. However, the current understanding of Buddhist eco-ethics still falls short of a holistic concept. To fill the gap, this paper argues that different macro perspectives should be considered in the process of developing a concept of holistic Buddhist eco-ethics. For this, we firstly attempt to clarify the dispute over the feasibility of Buddhist eco-ethics from the internal, external, and Buddhists’ perspectives. Then, we address the dispute concerning the classification of Buddhist eco-ethics, proposing a typology that accommodates different perspectives. Finally, two methods are suggested to mediate the dispute over Buddhist eco-ethics and justify its holistic concept, that is, regarding Buddhist eco-ethics as a form of virtue ethics and as a product of “engaged Buddhism.” Here, it is also emphasized to include Buddhists’ perspectives when mediating the dispute. Accordingly, we put forward a holistic concept for Buddhist eco-ethics that incorporates three main macro perspectives: ecological ethics in Buddhism, Buddhism in ecological ethics, and Buddhists’ environmental activities. It is hoped that the wisdom of Buddhist eco-ethics can help us forge a path towards a more harmonious and sustainable world in the near future.

Specific Investigations Concerning the Improveable Multiplier Architecture of High-Speed and Area-Efficient Adders

Over the past few decades, the growth of portable devices such as laptops, mobile phone and personal digital assistant has resulted in increasing demand for complex functionality with effective computation. The present day technology is known for digital systems with very high computing capabilities. The demand for high speed, low power integrated circuits for portable devices has become crucial. The never ending growing complexities of integrated circuit for future devices pose a challenging task for integrated circuit designer. Cost effective integrated circuits requires the design meeting out the challenging task to optimize power, area with high performance. Hence this research focuses on the optimization of area, power and speed of Arithmetic circuits, Very Large Scale Integrated circuits (VLSI) are widely used in Arithmetic circuits, Digital Signal Processing (DSP), Image and Video Processing applications

Closing the cell door: where are the Histories of Care-leavers at the old Melbourne Gaol?

ABSTRACT The Old Melbourne Gaol maintains a crucial place in social histories of the city. The Gaol ceased operation in 1924 and, as a heritage site, locates its history firmly in the nineteenth and early-twentieth centuries. While the exhibition invites a moral consideration of modes of punishment implemented in the gaol, its critique suggests resolution: these are not practices that we engage in now. By presenting these kinds of closed or finished narratives, the site turns visitors firmly towards the past rather than creating a site which invites reflection on the harms that carceral institutions continue to inflict in the present day. This, we argue, has a particular significance for Care-leavers, who are a significant demographic to have passed through the Gaol’s walls. While recognising that a site like the Old Melbourne Gaol has innumerable memory communities invested in it, and that no presentation of the site might fully satisfy them all, this article argues for present-looking public histories that place the gaol’s history in conversation with weighty social justice issues of today, including acknowledging the gaol’s role as part of the foundations of the ‘care’-to-prison pipeline observed by many activists as a pressing social issue in the twenty-first century.