Miracle-dz/UniFAR-FTUs huggingface dataset:
A 1-year characterization of organic aerosol composition and sources using an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF)

Abstract. The aerosol mass spectrometer (AMS), combined with statistical methods such as positive matrix factorization (PMF), has greatly advanced the quantification of primary organic aerosol (POA) sources and total secondary organic aerosol (SOA) mass. However, the use of thermal vaporization and electron ionization yields extensive thermal decomposition and ionization-induced fragmentation, which limit chemical information needed for SOA source apportionment. The recently developed extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) provides mass spectra of the organic aerosol fraction with a linear response to mass and no thermal decomposition or ionization-induced fragmentation. However, the costs and operational requirements of online instruments make their use impractical for long-term or spatially dense monitoring applications. This challenge was overcome for AMS measurements by measuring re-nebulized water extracts from ambient filter samples. Here, we apply the same strategy for EESI-TOF measurements of 1 year of 24 h filter samples collected approximately every fourth day throughout 2013 at an urban site. The nebulized water extracts were measured simultaneously with an AMS. The application of positive matrix factorization (PMF) to EESI-TOF spectra resolved seven factors, which describe water-soluble OA: less and more aged biomass burning aerosol (LABBEESI and MABBEESI, respectively), cigarette-smoke-related organic aerosol, primary biological organic aerosol, biogenic secondary organic aerosol, and a summer mixed oxygenated organic aerosol factor. Seasonal trends and relative contributions of the EESI-TOF OA sources were compared with AMS source apportionment factors, measured water-soluble ions, cellulose, and meteorological data. Cluster analysis was utilized to identify key factor-specific ions based on PMF. Both LABB and MABB contribute strongly during winter. LABB is distinguished by very high signals from C6H10O5 (levoglucosan and isomers) and C8H12O6, whereas MABB is characterized by a large number of CxHyOz and CxHyOzN species of two distinct populations: one with low H:C and high O:C and the other with high H:C and low O:C. Two oxygenated summertime SOA sources were attributed to terpene-derived biogenic SOA, a major summertime aerosol source in central Europe. Furthermore, a primary biological organic aerosol factor was identified, which was dominated by plant-derived fatty acids and correlated with free cellulose. The cigarette-smoke-related factor contained a high contribution of nicotine and high abundance of organic nitrate ions with low m∕z.
Late-time cosmological evolution in degenerate higher-order scalar-tensor models

We study the late cosmological evolution, from the nonrelativistic matter dominated era to the dark energy era, in modified gravity models described by degenerate higher-order scalar-tensor (DHOST) theories. They represent the most general scalar-tensor theories propagating a single scalar degree of freedom and include Horndeski and beyond Horndeski theories. We provide the homogeneous evolution equations for any quadratic DHOST theory, without restricting ourselves to theories where the speed of gravitational waves coincides with that of light since the present constraints apply to wavelengths much smaller than cosmological scales. To illustrate the potential richness of the cosmological background evolution in these theories, we consider a simple family of shift-symmetric models, characterized by three parameters and compute the evolution of dark energy and of its equation of state. We also identify the regions in parameter space where the models are perturbatively stable.
Estimating the impact of Airbnb on the local economy: Evidence from the restaurant industry

We study the effect of Airbnb on restaurant revenue in the state of Texas using a difference in difference strategy that exploits the geographical and temporal variation of Airbnb’s entry in Texas to show that a 1% increase in Airbnb listings is associated with a 0.01% increase in restaurant revenue. Moreover, this increase is revenue is driven, at least in part, by an increase in restaurant demand. Finally, we show that the positive effect of Airbnb is more pronounced for independent restaurants and less commercial—and therefore with less economic activity—zipcodes. Overall, our results provide evidence that home-sharing platforms like Airbnb can increase economic activity for businesses and in neighborhoods that are more likely to need it most.
Probability Distributions of Particle Hop Distance and Travel Time Over Equilibrium Mobile Bedforms

The joint probability distribution of streamwise particle hop distance, lateral particle hop distance, and travel time constrains the relationships between topographic change and sediment transport at the granular scale. Previous studies have investigated the ensemble characteristics of particle motions over plane bed topography; however, it is unclear whether reported distributions remain valid when bedforms are present. Here, we present measurements of particle motion over bedform topography obtained in a laboratory flume and compare these to particle motions over plane bed topography with otherwise similar conditions. We find substantial differences in particle motion in the presence of bedforms that are relevant to macroscopic models of sediment transport. Most notably, bedforms increase the standard deviation of streamwise and lateral hop distances relative to the mean streamwise hop distance. This implies that bedforms increase the streamwise and lateral diffusion lengths and, equivalently, increase diffusive‐like fluxes.
Predicted effectiveness of daily and non-daily PrEP for MSM based on sex and pill-taking patterns from HPTN 067/ADAPT.

BACKGROUND HPTN 067/ADAPT evaluated the feasibility of daily and non-daily HIV pre-exposure prophylaxis (PrEP) regimens among high-risk populations, including men who have sex with men (MSM) and transgender women, in Bangkok, Thailand and Harlem, New York, U.S. We used a mathematical model to predict the efficacy and effectiveness of different dosing regimens. METHODS An individual-based mathematical model was used to simulate annual HIV incidence among MSM cohorts. PrEP efficacy for covered sex acts, as defined in the HPTN 067/ADAPT protocol, was estimated using subgroup efficacy estimates from the iPrEx trial. Effectiveness was estimated by comparison of the HIV incidence with and without PrEP use. RESULTS We estimated that PrEP was highly protective (85%-96% efficacy across regimens and sites) for fully covered acts. PrEP was more protective for partially covered acts in Bangkok (71%-88% efficacy) than in Harlem (62%-81% efficacy). Our model projects 80%, 62%, and 68% effectiveness of daily, time-driven, and event-driven PrEP for MSM in Harlem compared with 90%, 85% and 79% for MSM in Bangkok. Halving the efficacy for partially covered acts decreases effectiveness by 8-9 percentage points in Harlem and by 5-9 percentage points in Bangkok across regimens. CONCLUSIONS Our analysis suggests that PrEP was more effective among MSM in Thailand than in the U.S. as a result of more fully covered sex acts and more pills taken around partially covered acts. Overall, non-daily PrEP was less effective than daily PrEP, especially in the U.S. where the sex act coverage associated with daily use was substantially higher.
The Effectiveness of Video-Assisted Flipped Classroom Learning Model Implementation in Integral Calculus

This study aimed to determine the effectiveness of applying video-assisted flipped classroom learning models in integral calculus courses. The effectiveness of learning in this study was measured based on the achievement of learning outcomes, student activities during learning, and student responses. This study was a pre-experimental study with a purposive sampling technique. The data collection method used two tests, observation sheets, and two questionnaires. Data analysis techniques were conducted by using statistical and inferential descriptive analysis. The results of the analysis showed: (1) The score of student learning outcomes has increased reaching a minimum completeness score of 70 with an average score of student learning outcomes in posttest 1 and posttest 2 of 75.28 and 78.09, (2) The average student activity is in the very active category, and (3) The average percentage of student response questionnaires on two response questionnaires, namely student response to the implementation of mathematics learning is amounted to 88%, and student response to instructional video media is amounted to84%. In general, it can be concluded that the video-assisted flipped classroom learning model is effective to be applied in mathematics learning.
Smoke of extreme Australian bushfires observed in the stratosphere over Punta Arenas, Chile, in January 2020: optical thickness, lidar ratios, and depolarization ratios at 355 and 532 nm

Abstract. We present particle optical properties of stratospheric smoke layers observed with multiwavelength polarization Raman lidar over Punta Arenas (53.2 ∘ S, 70.9 ∘ W), Chile, at the southernmost tip of South America in January 2020. The smoke originated from the record-breaking bushfires in Australia. The stratospheric aerosol optical thickness reached values up to 0.85 at 532 nm in mid-January 2020. The main goal of this rapid communication letter is to provide first stratospheric measurements of smoke extinction-to-backscatter ratios (lidar ratios) and particle linear depolarization ratios at 355 and 532 nm wavelengths. These aerosol parameters are important input parameters in the analysis of spaceborne CALIPSO and Aeolus lidar observations of the Australian smoke spreading over large parts of the Southern Hemisphere in January and February 2020 up to heights of around 30 km. Lidar and depolarization ratios, simultaneously measured at 355 and 532 nm, are of key importance regarding the homogenization of the overall Aeolus (355 nm wavelength) and CALIPSO (532 nm wavelength) lidar data sets documenting the spread of the smoke and the decay of the stratospheric perturbation, which will be observable over the entire year of 2020. We found typical values and spectral dependencies of the lidar ratio and linear depolarization ratio for aged stratospheric smoke. At 355 nm, the lidar ratio and depolarization ratio ranged from 53 to 97 sr (mean 71 sr) and 0.2 to 0.26 (mean 0.23), respectively. At 532 nm, the lidar ratios were higher (75–112 sr, mean 97 sr) and the depolarization ratios were lower with values of 0.14–0.22 (mean 0.18). The determined depolarization ratios for aged Australian smoke are in very good agreement with respective ones for aged Canadian smoke, observed with lidar in stratospheric smoke layers over central Europe in the summer of 2017. The much higher 532 nm lidar ratios, however, indicate stronger absorption by the Australian smoke particles.
Creating visibility: voluntary disclosure by private firms pursuing an initial public offering

We draw on (Merton, The Journal of Finance 42:483-510, 1987) to develop predictions for the benefits of voluntary disclosures by firms pursuing an initial public offering (IPO) prior to when they begin providing regulated financial information via their IPO prospectus. We find that voluntarily issuing press releases and attending investor and industry conferences are common disclosure activities prior to filing the IPO prospectus. Consistent with these disclosures enhancing investor awareness, we find positive associations with subsequent information acquisition by prospective investors and the financial press during the IPO filing period. These relations remain significant in tests exploiting the passage of the 2005 Securities Offering Reform as a source of variation in issuers’ ability to provide disclosures designed to attract attention from prospective investors. Consistent with pre-prospectus disclosures enhancing the visibility of the firm, we find that, while direct associations between pre-prospectus voluntary disclosures and IPO pricing are limited, there are significant indirect effects operating through filing-period information acquisition by prospective investors and media coverage. We find no evidence that issuers’ disclosure activities serve as hype, as the IPO price impact does not reverse post-offering. Overall our evidence is consistent with pre-prospectus voluntary disclosures benefiting issuers by enhancing awareness, which leads to improvements in firm valuations.
Uncertainty in aerosol radiative forcing impacts the simulated global monsoon in the 20th century

Abstract. Anthropogenic aerosols are dominant drivers of historical monsoon rainfall change. However, large uncertainties in the radiative forcing associated with anthropogenic aerosol emissions, as well as the dynamical response to this forcing, lead to uncertainty in the simulated monsoon response. We use historical simulations from the “SMURPHS” project, run using HadGEM3-GC3.1, in which the time-varying aerosol emissions are scaled by factors from 0.2 to 1.5 to explore the monsoon sensitivity to historical aerosol forcing uncertainty (present-day versus preindustrial aerosol forcing in the range −0.38 to −1.50 W m−2). The hemispheric asymmetry in emissions generates a strong relationship between scaling factor and both hemispheric temperature contrast and meridional location of tropical rainfall. Averaged over the period 1950–2014, increasing the scaling factor from 0.2 to 1.5 reduces the hemispheric temperature contrast by 0.9 ∘C, reduces the tropical summertime land–sea temperature contrast by 0.3 ∘C and shifts tropical rainfall southwards by 0.28∘ of latitude. The result is a reduction in global monsoon area by 3 % and a reduction in global monsoon intensity by 2 %. Despite the complexity of the monsoon system, the monsoon properties presented above vary monotonically and roughly linearly across scalings. A switch in the dominant influence on the 1950–1980 monsoon rainfall trend between greenhouse gases and aerosol is identified as the scalings increase. Regionally, aerosol scaling has a pronounced effect on Northern Hemisphere monsoon rainfall, with the strongest influence on monsoon area and intensity located in the Asian sector, where local emissions are greatest.
Assessing psychological well-being in early adulthood: Empirical evidence for the structure of daily well-being via network analysis

Abstract The transitional years of early adulthood, with key tasks of identity and intimacy development, engender both opportunities and risks for well-being. We propose that the conceptualization and measurement of early adults’ well-being can be improved through (a) an integration of ideas from developmental and psychological science on well-being, (b) the use of short, daily momentary assessments of well-being, and (c) a developmentally-informed examination of the structure of well-being within (and not just across) time. We developed a daily assessment of well-being based on the PERMA model (Seligman, 2011) and used network analysis to gain understanding from this data. Using Ecological Momentary Assessments, we assessed the five PERMA elements in college students’ daily life and their network properties. Consistent with the PERMA model, network analysis showed items clustered around theorized elements and formed a unitary network of well-being. Consistent with developmental theory, we found that having positive relationships and positive emotion were most central to early adults’ daily well-being.
Anticipating and addressing the ethical implications of deepfakes in the context of elections

New media synthesis technologies are rapidly advancing and becoming more accessible, allowing users to make video and audio clips (i.e. deepfakes) of individuals doing and saying things they never did or said. Deepfakes have significant implications for the integrity of many social domains including that of elections. Focusing on the 2020 US presidential election and using an anticipatory approach, this article examines the ethical issues raised by deepfakes and discusses strategies for addressing these issues. Eight hypothetical scenarios are developed and used as the basis for this analysis, which identifies harms to voters who view deepfakes, candidates and campaigns that are the subjects of deepfakes, and threats to electoral integrity. Four potential forms of intervention are discussed with respect to multi-stakeholder responsibility for addressing harms, including education and media literacy, subject defense, verification, and publicity moderation.
Relative Performance Evaluation and Competitive Aggressiveness

We examine the relation between incentive plans based on relative performance and competitive aggressiveness. Using data on executive incentive-compensation contracts in large U.S. firms, we find a positive relation between the use of relative performance plans and competitive aggressiveness. Moreover—and consistent with our theoretical prediction—we find that this relation is stronger among firms with peer group overlap—i.e., the extent to which two firms select each other as peers in these incentive plans. Our findings indicate that these firms take more frequent as well as more complex competitive actions, relative to firms that do not use relative performance plans. Collectively, our findings provide evidence on how widely used executive incentive-compensation practices impact firm decisions.
Glacier runoff variations since 1955 in the Maipo River basin, in the semiarid Andes of central Chile

Abstract. As glaciers adjust their size in response to climate variations, long-term changes in meltwater production can be expected, affecting the local availability of water resources. We investigate glacier runoff in the period 1955–2016 in the Maipo River basin (4843 km2, 33.0–34.3∘ S, 69.8–70.5∘ W), in the semiarid Andes of Chile. The basin contains more than 800 glaciers, which cover 378 km2 in total (inventoried in 2000). We model the mass balance and runoff contribution of 26 glaciers with the physically oriented and fully distributed TOPKAPI (Topographic Kinematic Approximation and Integration)-ETH glacio-hydrological model and extrapolate the results to the entire basin. TOPKAPI-ETH is run at a daily time step using several glaciological and meteorological datasets, and its results are evaluated against streamflow records, remotely sensed snow cover, and geodetic mass balances for the periods 1955–2000 and 2000–2013. Results show that in 1955–2016 glacier mass balance had a general decreasing trend as a basin average but also had differences between the main sub-catchments. Glacier volume decreased by one-fifth (from 18.6±4.5 to 14.9±2.9 km3). Runoff from the initially glacierized areas was 177±25 mm yr−1 (16±7 % of the total contributions to the basin), but it shows a decreasing sequence of maxima, which can be linked to the interplay between a decrease in precipitation since the 1980s and the reduction of ice melt. Glaciers in the Maipo River basin will continue retreating because they are not in equilibrium with the current climate. In a hypothetical constant climate scenario, glacier volume would reduce to 81±38 % of the year 2000 volume, and glacier runoff would be 78±30 % of the 1955–2016 average. This would considerably decrease the drought mitigation capacity of the basin.
Impact of granulocyte colony‐stimulating factor on FOLFIRINOX‐induced neutropenia prevention: A population pharmacokinetic/pharmacodynamic approach

Granulocyte colony‐stimulating factor (G‐CSF) is frequently prescribed to prevent chemotherapy‐induced neutropenia, but the administration schedule remains empirical in case of bimonthly chemotherapy such as FOLFIRINOX regimen. This pharmacokinetic/pharmacodynamic (PK/PD) study was performed to determine the effect of different G‐CSF regimens on the incidence and duration of neutropenia following FOLFIRINOX administration in order to propose an optimal G‐CSF dosing schedule.
Gross and Morphometrical Studies on the Testes of Large White Yorkshire Pig (Sus scrofa)

A study was conducted on the testes of 30 Large White Yorkshire pig aged between seven months to around one and half year. The testes were procured from apparently healthy animals from private abattoir house in Bikaner. The testes were located in the perineal region. The left testis was larger and longer than right testis. Long axis of the testis was vertical in position. The parenchyma of testis was reddish grey in colour. The mediastinum testis was an axial strand of fibro-elastic tissue and white in colour. It was well developed. The parameters of length, breadth, thickness, circumference, volume and weight of left testes were non-significantly higher than right one.
Distribution of the invasive seaweed Undaria pinnatifida in Lyttelton Harbour, New Zealand, and its interactions with native mussel reef communities.

X 1 General introduction . 1 1.1 Biological invasions and invasive seaweeds . 1 1.2 Undaria’s natural distribution and invasion history . 2 1.3 Perna canaliculus . 5 1.4 Mussels as habitat formers and ecosystem engineers . 7 1.5 How seaweeds affect mussels . 8 1.6 Undaria’s impacts on rocky shore ecosystems . 10 1.7 Overview and aims of this thesis . 11 1.8 Study site . 13 2 Distribution and abundance of Undaria pinnatifida in Lyttelton Harbour and its co-occurrence with native mussels . 15 Abstract . 15 2.
Academic Performance: The Role of Grit Compared to Short and Comprehensive Inventories of Conscientiousness

Grit has been suggested as a predictor of academic success over and above established constructs like conscientiousness (C) but has only been compared to brief inventories of trait-level C. This study examined the difference between using a brief inventory of C (Big Five Inventory [BFI]) and a facet-level inventory (NEO Personality Inventory–Revised [NEO PI-R]) as controls for grit in an undergraduate sample (N = 1,394). Grit exhibited strong correlations with C, particularly the facets of self-discipline and achievement striving. When BFI was used, both grit and C added small increments in explained variance while controlling for each other. When NEO PI-R was used, grit could not explain any additional variance in university grade and minuscule amounts (4%) in high school grade. Facets of C added moderate amounts (16%–54%) of incremental variance to both university and high school grades when controlling for grit. The results demonstrated that different outcomes are to be expected depending upon the choice of C measure.
Macroeconomic Effects of Maternity Leave Legislation in Emerging Economies

This study evaluates the effects of maternity leave duration on female and male labor force participation and on macroeconomic productivity in emerging countries. We build a comprehensive maternity leave data set for a panel of emerging countries at annual frequency that augments publicly available data on maternity leave with narrative evidence that identifies the exact dates when legislative changes to maternity leave policies were enacted and enforced. The higher data frequency allows us to study both the short-term and the intermediate-term effects of maternity leave duration. Maternity leave has positive but limited effects on female labor force participation, but it significantly increases male labor force participation. There is some evidence that increases in maternity leave duration decrease productivity in the short run, but there are no significant adverse effects at longer horizons. We also find evidence of substitutability between male and female workers. The results for emerging countries look substantially different when compared to the results for a panel of developed countries.