Fourth Event Research Articles

"Near Miss": A Mixed-Methods Analysis of Medical Student Assignments in Patient Safety.

The purpose of this study is to inform the curriculum for Entrustable Professional Activity 13 through analysis of fourth year medical student patient safety event assignments. From 2016 to 2021, students were asked to identify a patient safety event and indicate if the event required an incident report. Assignments were reviewed and coded based on Joint Commission incident definitions. Qualitative analysis was performed to evaluate incident report justification. There were 473 student assignments included in the analysis. Assignments reported incidents regarding communication, medical judgment, medication errors, and coordination of care. Students indicated only 18.0% (85/473) would warrant an incident report. Justification for not filing an incident report included lack of harm to the patient or that it was previously reported. Students were able to identify system issues but infrequently felt an incident report was required. Justifications for not filing an incident report suggest a need for a curriculum focused on the value of reporting near misses and hazardous conditions.

Traffic induced compaction and physical quality of grassland soil under different soil moisture deficits

Soil compaction is widely recognised as one of the key contributors to soil degradation in Europe. Information is needed for farmers and land managers to guide management decisions and prevent traffic-induced soil compaction. Predicted soil moisture deficit (SMD) from the hybrid SMD model may provide information on when soil conditions are suitable for machinery trafficking. The objective of this study was to investigate the relationship between soil water content and traffic induced soil compaction and if a predicted SMD threshold level could be identified, above which soils can be trafficked without significant soil compaction occurring. The study also evaluated the capacity of selected soil physical indicators such as soil bulk density and water stable aggregates to indicate soil physical degradation across a range of soil water contents. The experiment was carried out on grassland with moderately drained soil, located in Wexford, Ireland. Machinery trafficking of the soil with a tractor equipped with a fully loaded slurry tanker, was assessed in the field across the four seasons of the year. Traffic was imposed at target predicted SMD + 10 mm (relatively dry soil), 0 mm (relatively moist soil), and −10 mm (relatively wet soil). After each traffic event, samples were taken in the middle of the wheel track at three depths (0–10, 10–20 and 20–30 cm) to assess soil bulk density. Water aggregate stability was evaluated at the same three depths following the fourth traffic event. Results showed that when planning field machinery operations, especially repeated trafficking events, soil becomes prone to physical degradation when predicted SMD ≤ 0 mm. Traffic on soil at predicted SMD 0 mm (close to field capacity) lead to compaction after two traffic events. However, when predicted SMD was −10 mm, soil bulk density indicated no significant difference from the non-trafficked soil. When water-stable aggregates were measured on the predicted SMD 0 mm and −10 mm trafficked soils, it indicated physical degradation of soil. Hence, bulk density alone did not give an accurate indication of soil structural quality when soils where trafficked under relatively wet or saturated conditions (SMD −10 mm). These results indicate that avoiding machinery trafficking of grassland soils at predicted SMD ≤ 0 mm will help protect soil physical structure. On soils where multiple machinery operations are likely to occur over the year, trafficking when the predicted SMD > 0 mm is recommended to minimise loss of soil physical quality.

Apatite Fission‐Track Thermochronology in the Tamusu Area, Bayingobi Basin, NW China, and its Geological Significance

AbstractThe Bayingobi basin is located in the middle of Central Asia Orogenic Belt, at the intersection of Paleo‐Asian Ocean and Tethys Ocean, as well as the junction of multiple tectonic plates. This unique tectonic setting underpins the basin's intricate history of tectonic activity. To unravel the multifaceted tectono‐thermal evolution within the southwestern region of the basin and to elucidate the implications of sandstone‐hosted uranium mineralization, granitic and clastic rock samples were collected from the Zongnai Mts. uplift and Yingejing depression, and apatite fission track (AFT) dating and thermal history simulation analysis were performed. AFT dating findings reveal that the apparent ages of all samples fall within the range of 244 Ma to 112 Ma. In particular, the bedrock of the Zongnai Mts. and Jurassic detrital apatite fission tracks have undergone complete annealing, capturing the uplift‐cooling age. Meanwhile, the AFT ages of Cretaceous detrital rocks are either equivalent to or notably exceed the age of sedimentary strata, signifying the cooling age of the provenance. A comprehensive examination of AFT ages and palaeocurrent direction analyses suggests that the Cretaceous source in the Tamusu area predominantly originated from the central and southern sectors of the Zongnai Mts. uplift. However, at a certain juncture during the Late Early Cretaceous, the Cretaceous provenance expanded to include the northern part of the Zongnai Mts. uplift. Based on the results of thermal history simulations and previous studies, it is considered that the Tamusu area has undergone four distinct tectonic uplift events since the Late Paleozoic. The first is the Late Permian to Early Triassic (260–240 Ma), which is associated with the closure of the Paleo‐Asian Ocean and the accretionary orogeny within the Alxa region. The second uplift event took place in the Early Jurassic (190–175 Ma) and corresponded to intraplate orogeny following the closure of the Paleo‐Asian Ocean. The third uplift event is the Late Jurassic to Early Cretaceous (160–120 Ma), which is linked to the East Asia's position as the convergence center of multiple tectonic plates during this period. The fourth uplift event is linked to the Late Early Cretaceous (112–100 Ma), driven either by the westward subduction of the eastern Pacific plate or the mantle upwelling resulting from the Bangong–Nujiang oceanic lithosphere subduction and slab break‐off. The primary stress orientation for the first three tectonic uplift phases approximated a nearly SN direction, while the fourth stage featured a principal stress direction of NW. The fourth tectonic uplift event of the Late Early Cretaceous and basaltic eruption thermal event during this period likely exerted a significant influence on the formation of the Tamusu sandstone‐hosted uranium deposit.

Crustal evolution of the northern Nyika Subdomain of the Palaeoproterozoic Ubendian belt in Malawi

The Ubendian belt extends from eastern Congo through SW Tanzania and NW Zambia across northern Malawi and into Mozambique. It results from the Palaeoproterozoic accretion of a number of crustal blocks followed by the collision of the Tanzanian and Congo cratons. The Ubendian belt has been classically divided into eight “terranes”, (termed “subdomains” in this work), based on rock assemblage, magmatic and metamorphic history. This paper is concerned with the geological evolution of the southernmost of these, the Nyika Subdomain.We present an extensive dataset to decipher the geological history of the northern part of the Nyika Subdomain, including field observation, LA-ICP-MS U/Pb geochronology on zircon and monazite and a metamorphic petrological study of the extensive characteristic migmatitic cordierite-bearing gneisses. The U/Pb zircon data records four magmatic pulses. The first is represented by xenocrysts dated between 2200 and 2150 Ma. The second, major pulse is dated at ca. 2030 Ma, followed by minor magmatic activity at ca. 1980 Ma. This event is coeval with regional granulite facies metamorphism (ca. 780 °C and 0.6 Gpa), constrained in age U/Pb monazite and xenotime dated at 1977 ± 14 Ma and 1984 ± 13 Ma, respectively and also probably dates the collision between the Congo and Tanzania cratons. A fourth event represented by the intrusion of the Nyika Suite granites at 1944 ± 7 Ma terminates the Palaeoproterozoic history. There follows a long time interval with no recorded orogenic history before the tectonic activity during the Neoproterozoic Pan African orogeny. The regional significance of the evolution of the Nyika Subdomain with respect to the adjacent Ufipa Subdomain and the “Bangweulu Block” to the west are discussed within the framework of the Ubendian orogeny and the wider Palaeoproterozoic history of the region.

Systematic KMTNet Planetary Anomaly Search. X. Complete Sample of 2017 Prime-field Planets

We complete the analysis of planetary candidates found by the KMT AnomalyFinder for the 2017 prime fields that cover ∼13 deg2. We report three unambiguous planets: OGLE-2017-BLG-0640, OGLE-2017-BLG-1275, and OGLE-2017-BLG-1237. The first two of these were not previously identified, while the last was not previously published due to technical complications induced by a nearby variable. We further report that a fourth anomalous event, the previously recognized OGLE-2017-BLG-1777, is very likely to be planetary, although its light curve requires unusually complex modeling because the lens and source both have orbiting companions. One of the three unambiguous planets, OGLE-2017-BLG-1275, is the first AnomalyFinder discovery that has a Spitzer microlens parallax measurement, π E ≃ 0.045 ± 0.015, implying that this planetary system almost certainly lies in the Galactic bulge. In the order listed, the four planetary events have planet-host mass ratios q and normalized projected separations s of (logq,s)=(−2.31,0.61) , (−2.06, 0.63/1.09), (−2.10, 1.04), and (−2.86, 0.72). Combined with previously published events, the 2017 prime fields contain 11 unambiguous planets with well-measured q and one very likely candidate, of which three are AnomalyFinder discoveries. In addition to these 12, there are three other unambiguous planets with large uncertainties in q.

Impact of ByteDance crisis communication strategies on different social media users

The impact of corporate crisis communication strategies on users’ attitudes across different platforms has emerged as a new focal point in crisis management. This study is rooted in Social Media Crisis Communication (SMCC) and employs the case of Trump’s sanctions on TikTok to analyze variations in the effects of ByteDance’s crisis communication strategies on different social media platforms. We initally identified five announcements that generated significant discussions on Toutiao and Weibo and collected the corresponding user comments (a total of 50,702). Subsequently, we utilized two approaches, machine learning and deep learning, to conduct sentiment classification tests on the text to identify the best-performing model. This model was then applied on the entire dataset for sentiment classification, followed by semantic network analysis based on the sentiment classification results. The results demostrated that the pre-trained ERNIE model outperformed the other tested models (F1 = 82.40%). Following the fourth crisis communication event, users on Toutiao and Weibo exhibited contrasting sentimental tendencies. Theoretically, we observed that users on different social media platforms relying on distinct information sources, expressed different sentimental responses to the same crisis. Social media users have a tendency to anthropomorphize corporate personality traits. In practical terms, we recommend that companies engage in crisis communication on multiple social media platforms and do not overlook the most influential platforms in the market.

Empowering African Girls?

Abstract In the 1980s and 1990s, actors from The African Women’s Development and Communication Network (FEMNET) and the United Nations Children’s Fund (UNICEF) created and internationalized frameworks for girl-focused economic policymaking. They successfully lobbied to include girl-centered programming in the 1995 UN World Conference on Women—the fourth and final event of its kind and one that cemented international norms for the linked UN movements for women’s rights and economic development. Yet this is not a tale of smooth circulation or easy alliances. Within the UNICEF-FEMNET network, ideas about girls and poverty were hotly contested; they did not couple seamlessly. As some frameworks internationalized, others disappeared. Combining histories of knowledge with intersectional and postcolonial methodologies shows how the creation of dominant policy frameworks has involved not only the diffusion of ideas but also their erasure. The article puts forth an alternative methodology that analyzes the interwoven processes of circulation and noncirculation, and of selective amplification and silencing, that have often driven the internationalization of knowledge and the writing of history.

Low-threshold starts with communication

With the fourth event on the topic of vaccination, ‚Monitor Versorgungsforschung‘ is expanding its view to European best practice approaches on the one hand and to very practical findings from low-threshold vaccination services already existing in Germany, both in pharmacies and in companies as well as in the broad, but so far not very well-known field of activity of the public health service on the other.

Cytokine networks that suppress fish cellular immunity

Immunosuppressive cytokines are a class of cytokines produced by immune cells and certain non-immune cells that have a suppressive effect on immune function. Currently known immunosuppressive cytokines include interleukin (IL)-10, transforming growth factor beta (TGF-β), IL-35, and IL-37. Although latest sequencing technologies have facilitated the identification of immunosuppressive cytokines in fish, IL-10 and TGF-β were the most well-known ones that have been widely studied and received continuous attention. Fish IL-10 and TGF-β have been identified as anti-inflammatory and immunosuppressive factors, acting on both innate and adaptive immune systems. However, unlike mammals, teleost fish underwent a third or fourth whole-genome duplication event, which significantly expanded the gene family associated with the cytokine signaling pathway, making the function and mechanism of these molecules need further investigation. In this review, we summarize the advances of studies on fish immunosuppressive cytokines IL-10 and TGF-β since their identification, mainly focusing on production, signaling transduction, and effects on the immunological function. This review aims to expand the understanding of the immunosuppressive cytokine network in fish.

Global Guns, Violence and Criminology

These four books published recently reflect, in their different ways, how criminology is coming to grapple with questions of firearms and violence. These are timely topics; at home, in Europe and across the wider world, gun violence has seldom been out of the news. In the United Kingdom, following the recent Inquest verdict and the coroner’s report on the Plymouth mass shooting of 2021, not forgetting a series of domestic killings with lawfully held weapons (in Sussex 2020; Skye 2022; Cambridge 2023; and Epsom 2023) the licensing of firearms is under urgent review. In Hamburg, Germany, eight people died during a mass shooting in the city, the fourth such event in Germany in two decades. Concerns have arisen over allegedly lax firearm laws and the failure of police to act on information received anticipating the attack. Meanwhile, in the United States, the killing has continued unabated. As of 5 March 2023, 5,149 people had been killed by gunfire in the year so far, a rise of 75% on the same period in 2022, while the shooting at the Covenant school in Nashville marked the 131st mass shooting in the United States this year. Yet, while gun violence in the United States and the global North regularly makes the news and the United States is widely viewed as exceptional in this regard, as Wallace points out in his powerful collection, rates of gun violence are much higher in many Southern, poor, developing and highly weaponized societies. It is just that we do not hear so much about it and seldom reflect upon the colonial legacies often responsible.

Evidence for the Self-organized Criticality Phenomenon in the Prompt Phase of Short Gamma-Ray Bursts

The prompt phase of gamma-ray bursts (GRBs) contains essential information regarding their physical nature and central engine, which are as yet unknown. In this paper, we investigate the self-organized criticality phenomenon in GRB prompt phases as done in X-ray flares of GRBs. We obtain the differential and cumulative distributions of 243 short GRB pulses, such as peak flux, FWHM, rise time, decay time, and peak time in the fourth BATSE Time-Tagged Event Catalog with the Markov Chain Monte Carlo technique. It is found that these distributions can be well described by power-law models. In particular, comparisons are made with 182 short GRB pulses in the third Swift GRB Catalog from 2004 December to 2019 July. The results are essentially consistent with the BATSE ones. We notice that there is no obvious power-law index evolution across different energy bands for either BATSE or Swift short GRBs. The joint analysis suggests that the GRB prompt phase can be explained by a fractal-diffusive self-organized criticality system with the spatial dimension S = 3 and the classical diffusion β = 1. Our findings show that GRB prompt phases and X-ray flares possess the very same magnetically dominated stochastic process and mechanism.

Insight from a Physical-Based Model for the Triggering Mechanism of Loess Landslides Induced by the 2013 Tianshui Heavy Rainfall Event

Rainfall-induced landslides pose a significant threat to human life, destroy highways and railways, and cause farmland degradation in the Loess Plateau. From 19 June 2013 to 26 July 2013, continuous and heavy rainfall events occurred in the Tianshui area, Gansu Province. This strong rainfall process included four short-term serious rainfall events and long-term intermittent rainfall, triggering many shallow loess landslides. To improve our understanding of this rainfall process as the triggering mechanism of the loess landslides, we conducted the physical-based spatiotemporal prediction of rainfall-induced landslides. By utilizing precipitation data recorded every 12 h from the rain gauge stations and 51 soil samples from within a 50 km radius of the study area, we predicted 1000 physical-based model-calculated pictures of potential landslides, and the slope failure probability (Pf) of the study area was obtained by Monte Carlo simulations. The model was validated by the actual landslide data of the 2013 heavy rainfall event, and the effects of the precipitation process and the trigger mechanism on the landslides were discussed. The results showed that the fourth rainfall event had the best prediction ability, while the third event had the second-best prediction ability. There was a solid linear link between the antecedent precipitation (Pa) and the predicted landslide area (Pls) based on the fitting relationship, indicating that antecedent rainfall may play a significant role in the occurrence of landslides in the region. By comparing the distribution of the predicted results of the four heavy rainfall events with the actual landslide, we observed that the first two rainfall processes may not have been the main reason for slope failure, contributing only to prepare for the landslides in the later period. The superposition of the fourth and third rainfall events finally determined the spatial distribution characteristics of the landslide induced by the 2013 heavy rainfall event.

Acetylated corn and potato starches as an alternative to the toxic inorganic coagulants/flocculants for wastewater treatment

Inorganic coagulants/flocculants have been key in water treatments. However, last years, it has been reported the potential contamination that these give to the environment and serious risks to human health. For that reason, new eco-friendly alternatives have been the subject of exploration and research. This work focused on developing and elaborating a natural flocculant based on corn and potato starches, and its application in industrial wastewater treatments. Starches were isolated from corn and potato, and modified by acetylation method with the aim of improve its solubility. The morphological characterization using SEM identified the effects of acetylation process, the surface of acetylated corn and potato starches presented small erosions. The vibrational characterization via FTIR elucidated the physicochemical changes owing to acetylation. It found the replace of hydroxyl groups of α-glucose by the acetyl ones of amide I. A loss of the crystalline quality of corn starch were identified through structural characterization utilizing DRX. The partial replacement of hydroxyl by acetyl groups due to acetylation induced structural modifications corroborated employing the area under curve of the diffraction patterns. In the case of potato starch, its characteristic hexagonal crystalline structure was favored by the acetylation process, as it exhibited a more defined diffraction pattern. The thermal analysis by means of TGA found three thermal events for the acetylated potato starch and four for the acetylated corn starch. The fourth thermal event in the acetylated potato starch was associated with the ester presence of the added group. The thermal degradation occurred at lower temperatures as mass loss curves showed that acetylation weakened the polymer chains. The pH of zero point charge was 6.52 for the acetylated corn starch and 5.55 for the acetylated potato one, indicating that anionic contaminants be retained at a pH below 6.52 and 5.55 for each case, and the removal of cationic contaminants will favor at pH above these values. The efficiency determination of the modified starch-based flocculant was performed utilizing a jar test at different concentrations to find the optimal concentration of the coagulant/flocculant. Turbidity, color, pH, and electrical conductivity measurements were made before and after the water treatment. These results indicated that both corn and potato starches showed good performance as coagulants/flocculant. The kinetics for adsorption was study using the pseudo-first and pseudo-second order kinetic models, the intra-particle diffusion model, and the Elovich kinetic one. These analyzes identified that the absorption process is governed by chemisorption mechanisms since the pseudo-second order kinetic model was the most accurate for describing the absorption kinetic of both acetylated corn and potato starches according to the R2, SSE, MSE, and RMSE.

Reflection on the Proliferation of the Fourth Industrial Revolution and Its Implications on Rural Areas in South Africa

The Fourth Industrial Revolution (4IR) is the fourth major industrial event since the 1980s. This event affected everyone and changed the world. It's a dilemma in a world where the wealthy are advancing but the poor are falling behind, especially in rural areas. In a third-world country with a rural majority, like South Africa, many black people will be disadvantaged by the 4IR. The 4IR has implications for people in rural areas. The rich make up the economy of the first world, whilst the third world is largely rural. Rural areas frequently lag in development. For instance, mobile phone coverage is patchy in many rural areas while being available in suburban and semi-suburban areas. The 4IR, which is technology-based, has socio-economic effects on those who live in rural areas. Rural communities are unable to function in a 4IR world, so they are not profiting from it. One of the implications of the 4IR is job loss and an increased unemployment rate due to a deficiency of necessary and potential technical skills. Thus, this article intends to explore the proliferation of the 4IR and its implications on rural areas in South Africa. To realize this, the authors employed a qualitative research approach in the form of a document review. The economics theory of Asymmetric Information (AI) was applied to support the argument and ground of this article. The AI theory was established by George Akerlof, Michael Spence, and Joseph Stiglitz in the 1970s. The AI theory enables those with information to make wise judgments while those without are at a constant disadvantage. In terms of participation, rural communities will be excluded, not through their fault, but due to technological advances. The study concludes by highlighting the implications of the 4IR in rural areas. One of the implications found in this article is increased inequality. Recommendation: To ensure that all citizens have access to information on an equal basis, it is necessary for the government and business to work toward restoring economic competitiveness and improving the quality of governance. The disclosure of information and increased openness on information can help to narrow the information gap that exists between those who are informed (urban) and those who are not informed (rural) residents.

Orientation of the stream interface in CIRs

Corotating Interaction Regions (CIRs) are complex structures in the Heliosphere that arise from the interaction of fast and slow solar wind streams. The interface between fast and slow solar wind is called the stream interface, which often has considerable north-south tilt. We apply a sliding window correlation method on multi-spacecraft data in order to obtain the time delay between the spacecraft. Using these time delays and in-situ solar wind velocity measurements, we can shift the positions of two spacecraft, and, together with the position of the reference spacecraft, we can reconstruct the spatial orientation of the stream interface. We examined four CIRs from two different solar sources at the beginning of 2007 using ACE, WIND, and STEREO-A spacecraft data. The gradually increasing distance between STEREO-A and the other spacecraft provides an opportunity to determine the effects of spacecraft separation on the quality of the results. In three out of the four events, the determined planes generally follow the Parker spiral in the ecliptic, their off-ecliptic tilt is determined by the position of the source of the high-speed stream. For the fourth event, STEREO-A was probably too far away for this method to be successfully applied.

18-19세기 상주지역 남인 세력의 갈등

This study is to review the process of the disputes over the order of spirit tablets occurred in Okdong Seowon had been spread to Sangju and the Namin line seowons in Yeongnam region. The conflicts started from the activities of requesting for granting the board by Okdong Seowon in the 18th Century, and lasted for around 80 years until the early 19th Century. The houses of Hwang of Jangsu and Jeon of Okcheon in Sangju, who were descendants of the scholars enshrined in Okdong Seowon were in the middle of the conflicts, and the study summarizes the start of the disputes between both the houses and the process of their spreading and steadiness in Yeongnam region. T he f irst dispute s tarted when the appeal f or r equesting to grant a board for Okdong Seowon in 88(the 12th reigning year of King Jeongjo). T he s econd one o ccurred in t he p rocess to r ecord t he h istory o f the enshrined persons preparing for the King’s sacrificial writing after determination of g ranting the board in 89. T he t hird a ccident was the reoccurrence of the conflicts between both the houses over the method of enshrinement, gakchuk(各祝: individual enshrinement) or habchuk(合 祝: united enshrinement). T he s tudy f ocuses o n the fourth event. It o ccurred due to t he rearrangement of the order of spirit tablet for Saseo Jeon Sik(沙西 全湜) according to the generation instead of its original one, when repairing the temple of Okdong Seowon and returning the enshrined persons’ spirit tablets in 1804(the 4th r eigning year o f King S unjo) T hen, t he descendants of Jeon Sik enshrined additionally their ancestor’s nameplate in the temple of Donam Seowon with permission by small numbers of the staffs of Donam Seowon only. As the accident occurred without the official discussions and procedure, the conflict became exaggerated, dividing the factions into two over the responsibilities for the accident and leaving even in Saron of Namin in Sangju. The conflict lasted over one year without resolution, even spreading among the Namin line seowons in Yeongnam region. The fifth dispute started when the spirit tablet of Jeon Sik returned to the temple of Okdong Seowon with its original order by the official document by Gyeongsang Gamsa in 1808(the 8th reigning year of King Sunjo), and the house of Hwang of Jangsu opposed it fiercely and the house of Jeon of Okcheon responded to oppose the order of generation. As a result, King Gojong ordered the order of spirit tablet in the seowon should be in its original one, notifying to shut down the seowons with the board given by king following closing the private seowons in large scale at that time, and the disputes for about 80 years were resolved, finally. Since the th Century, even though there were differences depending on the seowons, in general, the institute of seowon changed its characteristics from the local community to focusing on the houses of literati c lass. T he d isputes over t he o rder o f spirit tablets i n Okdong Seowon could be its expansion. The academic function of seowons was decreased, while its enshrinement function was emphasized as a tool for competing power among the houses in local society and representing individual house’s socio-economic interests. In particular, hyangjeon (local house conflicts) focusing on seowons including various disputes over the order of ancestors and that of spirit tablets in seowons were largely derived from the changes of characteristics of seowons. As Okdong Seowon was originally run mainly by the descendants of the enshrined persons and became the institute granted with the board by king, the conflicts had to become more expanded in order to secure priority in running the seowon.

An EvoDevo Study of Salmonid Visual Opsin Dynamics and Photopigment Spectral Sensitivity.

Salmonids are ideal models as many species follow a distinct developmental program from demersal eggs and a large yolk sac to hatching at an advanced developmental stage. Further, these economically important teleosts inhabit both marine- and freshwaters and experience diverse light environments during their life histories. At a genome level, salmonids have undergone a salmonid-specific fourth whole genome duplication event (Ss4R) compared to other teleosts that are already more genetically diverse compared to many non-teleost vertebrates. Thus, salmonids display phenotypically plastic visual systems that appear to be closely related to their anadromous migration patterns. This is most likely due to a complex interplay between their larger, more gene-rich genomes and broad spectrally enriched habitats; however, the molecular basis and functional consequences for such diversity is not fully understood. This study used advances in genome sequencing to identify the repertoire and genome organization of visual opsin genes (those primarily expressed in retinal photoreceptors) from six different salmonids [Atlantic salmon (Salmo salar), brown trout (Salmo trutta), Chinook salmon (Oncorhynchus tshawytcha), coho salmon (Oncorhynchus kisutch), rainbow trout (Oncorhynchus mykiss), and sockeye salmon (Oncorhynchus nerka)] compared to the northern pike (Esox lucius), a closely related non-salmonid species. Results identified multiple orthologues for all five visual opsin classes, except for presence of a single short-wavelength-sensitive-2 opsin gene. Several visual opsin genes were not retained after the Ss4R duplication event, which is consistent with the concept of salmonid rediploidization. Developmentally, transcriptomic analyzes of Atlantic salmon revealed differential expression within each opsin class, with two of the long-wavelength-sensitive opsins not being expressed before first feeding. Also, early opsin expression in the retina was located centrally, expanding dorsally and ventrally as eye development progressed, with rod opsin being the dominant visual opsin post-hatching. Modeling by spectral tuning analysis and atomistic molecular simulation, predicted the greatest variation in the spectral peak of absorbance to be within the Rh2 class, with a ∼40 nm difference in λmax values between the four medium-wavelength-sensitive photopigments. Overall, it appears that opsin duplication and expression, and their respective spectral tuning profiles, evolved to maximize specialist color vision throughout an anadromous lifecycle, with some visual opsin genes being lost to tailor marine-based vision.

Rhyacian‐Orosirian Khondalite Belt in the Borborema Province (NE Brazil): An active margin setting based on U–Pb zircon and monazite constraints

Khondalite belts are of special importance is delimiting old suture zones and in palaeocontinental reconstruction of Precambrian terrains. In the South‐American Platform, khondalitic rocks surround cratonic areas and Archean blocks reworked in the Neoproterozoic, an example of which being the Ceará Khondalite Belt (CKB). Located in the northern portion of the Borborema Province in NE Brazil, CKB is here described by means of its petrographic, structural, and LA‐SF‐ICP‐MS zircon and monazite U–Pb geochronological characteristics. CKB constitutes an E‐W to NE–SW striking belt comprising migmatitic spinel (hercynite)‐ and graphite‐bearing cordierite‐garnet‐sillimanite‐biotite gneisses, small granulitic boudins, garnet‐biotite quartzite, lenses of garnet amphibolite, calc‐silicate rock, gondite, and mylonitized leucogneiss. Relicts of Palaeoproterozoic island and continental arcs surrounding CKB are represented by tonalitic and dioritic gneiss, respectively. The contact between CKB and the Neoproterozoic Independência Unit is marked by a transpressional shear zone to the north, whereas the contact between CKB and Archean and Palaeoproterozoic rocks to the south is via a N‐verging thrust fault. The metamorphic peak is given by the parageneses: spinel (hercynite)‐quartz, spinel (hercynite)‐cordierite, and cordierite‐sillimanite‐garnet, possibly stable under UHT conditions. Crystallization ages of 2,086 ± 8 Ma and 2,063 ± 9 Ma were obtained by dating CKB migmatitic dioritic orthogneisses using the zircon U–Pb method. The CKB para‐derived rocks yielded detrital zircon U–Pb age peaks at 2,190, 2,130, and 2,060 Ma. Three metamorphic stages are identified in the Palaeoproterozoic via U–Pb dating of zircon rims and monazite at 2,094 ± 4 Ma, 2,055 ± 5 Ma, and 1,958 ± 3 Ma. A fourth metamorphic event with associated migmatization in shear zones took place in the Neoproterozoic between 595 ± 6 Ma and 573 ± 15 Ma, as indicated by dating zircon rims and monazite, respectively. Our study shows that the metamorphic events occurring in CKB in the Palaeoproterozoic share similarities with those that affected the khondalitic rocks bordering the São Francisco and the North China cratons, which suggests the existence of a continuous orogen during the Rhyacian‐Orosirian related to the Columbia Supercontinent amalgamation.

Investigation on the spatiotemporal structures of supra-arcade spikes

Context. The vertical current sheet (VCS) trailing coronal mass ejections (CMEs) is the key place at which the flare energy release and the CME buildup take place through magnetic reconnection. The VCS is often studied from the edge-on perspective for the morphological similarity with the two-dimensional “standard” picture, but its three-dimensional structure can only be revealed when the flare arcade is observed side on. The structure and dynamics in the so-called supra-arcade region thus contain important clues to the physical processes in flares and CMEs. Aims. We focus on supra-arcade spikes (SASs), interpreted as the VCS viewed side on, to study their spatiotemporal structures. By comparing the number of spikes and the in situ derived magnetic twist in interplanetary CMEs (ICMEs), we intend to check on the inference from the standard picture that each spike represents an active reconnection site and that each episode of reconnection adds approximately one turn of twist to the CME flux rope. Methods. For this investigation we selected four events, in which the flare arcade has a significant north-south orientation and the associated CME is traversed by a near-Earth spacecraft. We studied the SASs using high-cadence high-resolution 131 Å images from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Results. By identifying each individual spike during the decay phase of the selected eruptive flares, we found that the widths of spikes are log-normal distributed. However, the Fourier power spectra of the overall supra-arcade extreme ultraviolet emission, including bright spikes, dark downflows, and the diffuse background, are power-law distributed in terms of either spatial frequency k or temporal frequency ν, which reflects the fragmentation of the VCS. We demonstrate that coronal emission-line intensity observations dominated by Kolmogorov turbulence would exhibit a power spectrum of E(k) ∼ k−13/3 or E(ν) ∼ ν−7/2, which is consistent with our observations. By comparing the number of SASs and the turns of field lines as derived from the ICMEs, we found a consistent axial length of ∼3.5 AU for three events with a CME speed of ∼1000 km s−1 in the inner heliosphere; but we found a much longer axial length (∼8 AU) for the fourth event with an exceptionally fast CME speed of ∼1500 km s−1, suggesting that when the spacecraft traversed its leg this ICME was flattened and its “nose” was significantly past the Earth.

KMT-2018-BLG-1743: planetary microlensing event occurring on two source stars

Aims. We present the analysis of the microlensing event KMT-2018-BLG-1743. The analysis was conducted as a part of the project, in which previous lensing events detected in and before the 2019 season by the KMTNet survey were reinvestigated with the aim of finding solutions of anomalous events with no suggested plausible models. Methods. The light curve of the event, with a peak magnification Apeak ~ 800, exhibits two anomaly features, one around the peak and the other on the falling side of the light curve. An interpretation with a binary lens and a single source (2L1S) cannot describe the anomalies. By conducting additional modeling that includes an extra lens (3L1S) or an extra source (2L2S) relative to a 2L1S interpretation, we find that 2L2S interpretations with a planetary lens system and a binary source best explain the observed light curve with Δχ2 ~ 188 and ~91 over the 2L1S and 3L1S solutions, respectively. Assuming that these Δχ2 values are adequate for distinguishing the models, the event is the fourth 2L2S event and the second 2L2S planetary event. The 2L2S interpretations are subject to a degeneracy, resulting in two solutions with s > 1.0 (wide solution) and s < 1.0 (close solution). Results. The masses of the lens components and the distance to the lens are (Mhost/M⊙,Mplanet/MJ,DL/kpc)~(0.19−0.111+0.27,0.25−0.14+0.34,6.48−1.03+0.94) and ~(0.42−0.25+0.34,1.61−0.97+1.30,6.04−1.27+0.93) according to the wide and close solutions, respectively. The source is a binary composed of an early G dwarf and a mid M dwarf. The values of the relative lens-source proper motion expected from the two degenerate solutions, μwide ~ 2.3 mas yr−1 and μclose ~ 4.1 mas yr−1, are substantially different, and thus the degeneracy can be broken by resolving the lens and source from future high-resolution imaging observations.