Miracle-dz/UniFAR-FTUs huggingface dataset:
Projecting the Potential Impact of COVID-19 School Closures on Academic Achievement

As the COVID-19 pandemic upended the 2019–2020 school year, education systems scrambled to meet the needs of students and families with little available data on how school closures may impact learning. In this study, we produced a series of projections of COVID-19-related learning loss based on (a) estimates from absenteeism literature and (b) analyses of summer learning patterns of 5 million students. Under our projections, returning students are expected to start fall 2020 with approximately 63 to 68% of the learning gains in reading and 37 to 50% of the learning gains in mathematics relative to a typical school year. However, we project that losing ground during the school closures was not universal, with the top third of students potentially making gains in reading.
Effect of temperature on filtration rate in the mussel Mytilus edulis: no evidence for temperature compensation

The filtration rate of Mytilus edulis as a function of acute change in temperature was measured by means of the clearance method in a group of mussels seasonally acclimated to 18°C. This was done by stepwise changes in temperature in order to both determine the temperature- tolerance interval within which the mussels were fully open, and to ensure that the acute effects were reversible. The filtration rate (F, ml min -1 ind. -1 ) as a function of temperature (T, °C) could be expressed by a regression line with the equation: F = 3.27T + 38.2 in the temperature-tolerance inter- val between 8.3 and 20°C. A reduction in temperature to below 8.3°C initiated valve closure, and at 6.1°C all mussels were completely closed. The same group of mussels was then acclimated to 11°C over a period of 5 d before the measurements were repeated, and the filtration rate as a function of temperature was subsequently found to be: F = 3.27T + 38.1 in the temperature-tolerance interval which had extended down to 4.1°C. Next, a group of mussels seasonally acclimated to about 15°C was split up into 3 subgroups which were exposed to 10.2, 15.6 and 20.3°C over the following 23 d. During the acclimation period, the filtration rate of fully open mussels was measured every 3 to 4 d in the 3 groups. Because none of the slopes of the 3 regression lines appreciably differed from 0, it is concluded that the acute effect of a change in temperature is not modified in M. edulis over a 3 wk acclimation period; i.e., there is no evidence for temperature compensation.
“We can’t return to normal”: committing to tourism equity in the post-pandemic age

Abstract Tourism transformation must bring an actionable focus on equity. A new normal openly recognizes the crises and tensions inhabiting tourism well before the COVID-19 pandemic along with the holistic and integrated nature of a pro-equity agenda. A resilient post-pandemic tourism must be more equitable and just, in terms of how it operates, its effects on people and place, and how we as scholars teach, study and publicly engage the travel industry—particularly in preparing its current and future leaders. A commitment to equity is about making specific changes in practices and decisions at multiple levels, along with growing a wider ethical framework. This pivot of a mindset requires us, as tourists, corporations, and educators to step away from a selfish perspective and critically change our perception and understanding of tourism to a truly equitable focus. Consequently, these actions force us to question the consumerism and capitalistic lens that has contributed to mass growth across the touristic landscape and instead, choose a system that fosters sustainable and equitable growth - which in turn, ‘slows down’ our ways of consuming the world around us - transforming our values and experiences of what tourism is and should be.
Genetic study of diversity and blast resistance in Ethiopian rice cultivars adapted to different ecosystems

Rice (Oryza sativa L.) has been considered one of the most important crops in Ethiopia. Landraces and improved accessions in Ethiopia were characterized on the basis of polymorphism data for SSR markers, and classified into two groups: I and II. Cluster I was further divided into two sub-clusters, Ia and Ib. Cluster Ia corresponded to Japonica-like type, Cluster Ib to Japonica type, and Cluster II to Indica type with some Indica-like type. Many landraces and improved varieties belonged to Cluster Ia. Superior landraces were included in Cluster Ib. Further categorization based on blast resistance demonstrated three groups: Clusters A, B1, and B2. Cluster A comprised accessions with relatively high resistance, whereas Clusters B1 and B2 included susceptible accessions. Most of the improved varieties were found in Cluster A. Superior landraces, X-Jigna classified into Ib or DNA type tended to be susceptible in Cluster B2 for blast resistance. These results demonstrated that traditional landraces preferred by farmers should be improved for disease resistance using blast-resistant varieties. In order to avoid hybrid sterility occurring in cross-hybridizing breeding between Indica and Japonica types, desirable parental accessions can be chosen within the same DNA cluster. The clustering information among accessions may be useful in breeding schemes for selection of counterparts in cross-breeding programs.
Effect of dietary energy content on gilthead sea bream (Sparus aurata) feeding behaviour and nutritional use of the diet

We have studied how the diet energy level affects gilthead sea bream (Sparus aurata) daily pattern of demand-feeding activity and nutritional use of the diet under summer- and winter-like conditions. To that end, animals were kept in a closed circuit under controlled temperature and photoperiod, and fed one of two commercial diets with either high (H: 238 g kg[superscript [-]1] fat) or low (L: 172 g kg[superscript [-]1] fat) energy content. In summer conditions (26 °C; 12 : 12 L : D), both diets yielded similar growth rate (0.7 ± 0.0 and 0.7 ± 0.1) and thermal unit growth coefficient values (0.6 ± 0.0 and 0.6 ± 0.0), and although the daily rate of delivered feed was somewhat higher for fish under the high-energy diet (16 ± 2 g kg[superscript [-]1] of fish) the difference was not significant. In winter conditions (17 °C; 9 : 15 L : D), on the other hand, no differences were found for any of the parameters evaluated. Thus, the higher lipid content of the diet does not appear to have any protein sparing effect. The 'summer' demand-feeding pattern displayed three daily peaks, which were quite apparent for fish under the low-energy diet, but rather smoothed for those that ate the energy-rich diet. This profile was replaced in winter conditions by a single peak around noon, and the animals also displayed a lower overall number of demands.
‘Non-traditional’ and ‘traditional’ students at a regional Finnish University: demanding customers and school pupils in need of support

ABSTRACT This article explores university students’ constructions of the ideal student at present-day university, that emphasises student-as-consumer culture and employability rather than education as a virtue in itself. The research is based on thematic narrative accounts (n = 67) generated in a generalist field in one regional Finnish university. We apply a narrative-discursive approach to analyse how ‘traditional’ young students (n = 34) and ‘non-traditional’ mature students (n = 33) position themselves in relation to the ideal good student in a present-day university and in relation to their university studies. Moreover, we examine some of the consequences of such positionings for the students themselves. Our analysis indicates that the present-day university student is constructed in line with the ideal student of the neoliberal order and student-as-consumer culture. However, whereas mature students positioned themselves as customers and were comfortable with the demands of today’s university for self-directedness and self-responsibility, younger students positioned themselves as ‘school pupils’ and were critical about being left on their own without adequate support. The study suggests that the terms ‘traditional’ and ‘non-traditional’ make differences related to age and different kinds of student positionings visible and, thus, also possible to reconstruct the ideals and normalities of the present-day neoliberal university.
Limnological studies of two contrasting but closely linked springs in Nigeria, West Africa

ABSTRACT An account is presented of the chemistry and algal flora of two streams in Ekiti State, Nigeria. The two streams, one of which is much warmer than the other, are separate upstream but subsequently merge. A comparison of the springs revealed that while they differed markedly in temperature, colour, turbidity, conductivity, solids, total alkalinity, total hardness, Ca, SiO3, SO4, Mg, Cl- and dissolved oxygen, they showed some similarities in pH, Fe, Na, K, PO4 and NO3. In the cold spring, while total alkalinity, conductivity and silicate increased in the wet season, total hardness decreased slightly and other variables exhibited fluctuations with season. For the warm spring, except for increased total alkalinity and total hardness, dissolved oxygen and pH decreased in the wet season. However, most parameters of the warm spring were unaffected by season. Floristically, the springs were rich in species with a total of 84 taxa: 56 in the warm spring, 33 in the cold spring, 44 at the confluence and 40 beyond the confluence. The warm spring was dominated mainly by blue-green algae such as Lyngbya birgei, Synechococcus aequalis and Oscillatoria spp. ; the cold spring was dominated by Rhizoclonium hieroglyphicum and Navicula spp. The confluence was dominated by Terpsinoe musica, R. hieroglyphicum and Lyngbya birgei, while the site downstream of the confluence was dominated entirely by R. hieroglyphicum. In most cases, the confluence and downstream area beyond the confluence of the springs exhibited intermediate characteristics between the two springs. This study is a contribution to the dearth of information on streams in West Africa.
Relationship between ploidy level and genome size in strawberries

This study investigated the pattern of variation in nuclear DNA content at different ploidy levels in Fragaria (Strawberry, Rosaceae) using flow cytometry based on mean fluorescent intensity (MFI) reflected by propidium-iodide-stained nuclei. On average, MFI values were 237 for diploids F. vesca, F. viridis, and F. nubicola, 416.5 for tetraploid F. orientalis, 621.5 for hexaploid F. moschata, and 798 for octoploids F. × ananassa, F. virginiana, and F. chiloensis. Within diploids MFI ranged from 225.9 in F. vesca ssp. vesca to 255.4 in F. nubicola, and within octoploids varied from 766 in F. × ananassa to 808 in F. virginiana. The nuclear DNA variation was significant among diploid species (N = 21, P < 0.008), but not across octoploid species (N = 17, P>0.386). MFI values were also variable among different genotypes of a given species though not significant. The values of mean basic genome DNA (MFI divided by ploidy level) were 118.5, 104, 103.5, and 99.8, respectively, for diploids, tetraploid, hexaploid, and octoploid species. This indicates that relative genomic size decreases by increasing ploidy level, and that there is no direct proportional relationship between DNA content and ploidy levels in Fragaria, supporting the idea of genome downsizing during polyploidization in plants.
Caracterização das glândulas mandibulares nas diferentes classes de adultos de Scaptotrigona postica Latreille (Hymenoptera: Apidae)

The mandibular glands of newly-emerged, nurse and forager workers, virgin and physogastric queens, and mature males of Scaptotrigona postica Latreille were studied under histological and morphometrical analyses. These glands present differences in their histology, according to the age and/or function of the individuals. The morphometric results showed that the mandibular glands have a very markedly secretory cicle, in which the secretion starts to be produced in newly emerged workers, being accumulated into the cytoplasm and reservoir in the nurses. In forager workers the cytoplasm presents many vacuoles, which are remaining of the secretion releasing. Physogastric queens showed the largest cellular and nuclear areas. On the contrary, the males presented the smallest ones.
Habitat fragmentation affects movement and space use of a specialist folivore, the koala

Habitat fragmentation changes landscape patterns and can disrupt many important ecological processes. Movement allows individuals to find resource patches to maintain their fitness and habitat fragmentation can disrupt this process. We explored the ecological impact of habitat fragmentation on movement and space use of a specialist folivore, the koala Phascolarctos cinereus. We GPS tracked koala movements within a fragmented agricultural landscape. We calculated the total distance moved across four months and the number of core patches by each koala. We used four metrics (proximity, functional connectivity, clumpiness, perimeter‐to‐area fractal dimension) to quantify landscape fragmentation within koala home ranges and determine its effects on movement and space use. Functional connectivity had the greatest effect on individual movement and space use. Decreasing connectivity led to longer and more direct movements by koalas and more core patches within an individual home range. Our study provides insight into the effects of habitat fragmentation on animal movement and space use, which can be used by wildlife managers to plan and manage landscapes more effectively. We conclude that restoring or protecting resource patches to promote greater functional connectivity will reduce the costs associated with the isolation of resource patches for species occupying fragmented landscapes. By providing a quantitative relationship between habitat connectivity and movement and space use costs, our results enable managers to set restoration targets, by identifying the most effective way to provide the functional connectivity minimizing the negative impact on focal species.
EGG COMPOSITION AND HATCHLING PRECOCITY IN SEABIRDS

Summary This paper presents analyses of the composition (shell, yolk, albumen) and of the quality (lipid, protein and water contents) of yolk and albumen of eggs of 25 species of seabirds belonging to the Sphenisciformes, Procellariiformes, Pelecaniformes, and Lari of the Charadriiformes. These data are compared with those published for species in the same orders and suborders, and the combined seabird data are compared with published data for non-seabirds. Variation in the proportionate weight of eggshell is not related to hatchling precocity but is probably due to adaptive differences in nest substratum and the agility of the incubating birds. Lipid and protein contents of yolk, and water content of albumen, are uniform in eggs of all examined species. Protein levels of albumen and water content of yolk and of entire egg contents vary greatly between taxa. Contrary to previous claims there is no simple relationship between egg composition and hatchling precocity. Differences in egg composition will probably only be clearly understood when the nutritional needs of the embryo, and of the hatchling in the time before it regularly obtains food, are known.
Three species of arbuscular mycorrhizal fungi confer different levels of resistance to water stress in Spinacia oleracea L.

Arbuscular mycorrhizal fungi (AMF) are applied in agriculture to improve plant nutrition and confer better resistance to biotic and abiotic stresses. Spinacia oleracea L. is an economically important herbaceous crop characterized by limited tolerance to water stress. We compared the effects of three species of AMF belonging to the genus Glomus on gas exchange rates, growth and yield of spinach plants exposed to acute and prolonged water stress. Inoculated plants always gave better results than control (non-inoculated), stressed ones, being G. clarum the species that provided the significantly best effects and G. monosporum the less remarkable ones. Mycorrhizal inoculation is a valid tool to provide water stress resistance to horticultural crops, and experimental comparisons among different mycorrhizal strains can help to optimize the effect through the identification of specific associations.
Jet-installation noise and near-field characteristics of jet–surface interaction

The link between jet-installation noise and the near-field flow features of the corresponding isolated jet is studied by means of lattice-Boltzmann numerical simulations. The computational set-up consists of a flat plate placed in proximity to a jet, replicating the interaction benchmark study carried out at NASA Glenn. Installation effects cause low-frequency noise increase with respect to the isolated case, mainly occurring in the direction normal to the plate and upstream of the jet’s exit plane. It is shown that the Helmholtz number, based on the wavelength of eddies in the mixing layer and their distance to the plate trailing edge, predicts the frequency range where installation noise occurs. Based on the isolated jet near field, scaling laws are also found for the far-field noise produced by different plate geometries. The linear hydrodynamic field of the isolated jet shows an exponential decay of pressure fluctuations in the radial direction; it is shown that the far-field spectrum follows the same trend when moving the plate in this direction. In the axial direction, spectral proper orthogonal decomposition is applied to filter out jet acoustic waves. The resultant hydrodynamic pressure fluctuations display a wavepacket behaviour, which can be fitted with a Gaussian envelope. It is found that installation noise for different plate lengths is proportional to the amplitude of the Gaussian curve at the position of the plate trailing edge. These analyses show that trends of jet-installation noise can be predicted by analysing the near field of the isolated case, reducing the need for extensive parametric investigations.
Evaluation of doubled haploid culture conditions and regeneration of anindicarice hybrid

A study was undertaken to develop an effective protocol to generate doubled haploid plants from a proprietary Mahyco hybrid MRP5401. A total of 20,300 anthers were plated on four different DH media (basal N6 + phytohormones) and obtained a callus induction success rate of 1.52%, of which 0.48% developed into green plants. A total of 232 lines were obtained of which, 98 lines showed homozygosity in DH2–3 generations. Well established DH lines from MRP5401 in DH3 generation had early flowering and yield gain.
Determinants of Under-five Mortality in South Africa: Results from a Cross-Sectional Demographic and Health Survey

Under-five mortality remains a public health challenge in South Africa and other developing countries where children are likely to die before reaching five years. This paper aimed to identify factors associated with under-five mortality in South Africa taking into account clustering using the 1998 South African Demographic and Health Survey data. Survival analysis techniques were used to understand under-five mortality and its determinants. Frailty models incorporating family and community frailty effects were implemented. The results revealed that preceding birth interval, birth type, breastfeeding and dwelling unit type were significant determinants of under-five mortality. The findings further confirmed that children belonging to the same family and children belonging to the same community shared certain unobserved characteristics that put them at risk of death.
Responses of the Thyroid Gland to TSH and Other Thyroid Stimulators in the Growth-Retarded (grt) Mouse

Abstract The growth-retarded (grt) mouse, originally isolated from a closed colony of Snell's dwarf mouse (DW/J strain), shows growth retardation that is inherited in a recessive manner. We have already reported that this strain exhibits severe primary hypothyroidism with significantly reduced plasma levels of thyroxine (T4), dramatically elevated plasma titers of thyroid-stimulating hormone (TSH) and an increase in the number of immunoreactive TSH cells in the pituitary gland. The thyroid gland of the grt mouse exhibits characteristically numerous smaller follicles with poor colloid accumulation. In order to elucidate the possible site of the defect in the grt mouse, and in particular to clarify the discrepancy between elevated plasma TSH titers and reduced T4 levels, we examined the bioactivity of TSH recovered from the plasma sample of the grt animal and the responses of the grt thyroid gland to exogenous TSH and other thyroid hormone secretagogues. Plasma samples from the grt mice invariably exhibited significant levels of TSH bioactivity following injection into normal test mice. Thus, the reduced responsiveness to TSH exhibited by the grt mice is not due to the reduced bioactivity of TSH. Administration of exogenous TSH to the grt mice failed to elevate the plasma T4 and triiodothyronine (T3) levels in vivo or to stimulate free T4 and free T3 releases from the grt thyroid gland in vitro. The thyroid gland of the grt mouse exhibited a markedly diminished response of adenylate cyclase to exogenous TSH as compared to the gland of euthyroid littermates. Production of cAMP in the grt mouse was significantly increased following stimulation of the thyroid glands with forskolin, cholera toxin, prostaglandin (PG) E1 and isoproterenol. These results strongly suggest a defect in TSH responsiveness, particularly in TSH-TSH receptor-Gs protein-adenylate cyclase signalling system including the expression and the function of TSH receptor and the TSH receptor-Gs protein coupling, in the thyroid gland of the grt mice.
A note on leveraging synergy in multiple meteorological data sets with deep learning for rainfall–runoff modeling

Abstract. A deep learning rainfall–runoff model can take multiple meteorological forcing products as input and learn to combine them in spatially and temporally dynamic ways. This is demonstrated with Long Short-Term Memory networks (LSTMs) trained over basins in the continental US, using the Catchment Attributes and Meteorological data set for Large Sample Studies (CAMELS). Using meteorological input from different data products (North American Land Data Assimilation System, NLDAS, Maurer, and Daymet) in a single LSTM significantly improved simulation accuracy relative to using only individual meteorological products. A sensitivity analysis showed that the LSTM combines precipitation products in different ways, depending on location, and also in different ways for the simulation of different parts of the hydrograph.