Miracle-dz/UniFAR-FTUs huggingface dataset:
Redetermination of a cyclic triphosphenium hexa­chloro­stannate salt at 173 K

At 173 K, the structure of the cyclic `triphosphenium' salt, bis­[1,1,3,3-tetra­phenyl-1,3,2-triphospho­lenylium] hexa­chloro­stannate(IV) dichloro­methane solvate, (C26H24P3)2[SnCl6]·2CH2Cl2, contains one cation, one solvent mol­ecule and half of a centrosymmetric hexa­chloro­stannate dianion in the asymmetric unit. There are no unusually short anion–cation distances and the structures of the component ions are comparable to those that have been reported previously.
Integrin a3b1 controls mRNA splicing that determines Cox-2 mRNA stability in breast cancer cells

It is unknown how cues from the tumor microenvironment can regulate post-transcriptional mechanisms, such as alternative splicing, that control genes that drive malignant growth. The induction of cyclooxygenase 2 (Cox-2) by integrin a3b1 in breast cancer cells can promote tumor progression. We have used RNAi to suppress a3b1 in human MDA-MB-231 breast cancer cells and then investigated changes in global gene expression. Numerous mRNAs, including Cox-2, show altered expression and/or alternative exon usage (AEU) in a3b1-deficient cells. AEU included patterns predicted to render an mRNA susceptible to degradation, such as 39-UTR variations or retention of elements that target an mRNA for nonsense-mediated decay (NMD). PCR-based analysis of a3b1-deficient cells confirmed changes in Cox-2 mRNA that might target it for NMD, including retention of an intron that harbors premature termination codons and changes within the 39UTR. Moreover, Cox-2 mRNA has reduced stability in a3b1deficient cells, which is partially reversed by knockdown of the essential NMD factor UPF1. Our study identifies a3b1-mediated AEU as a novel paradigm of integrin-dependent gene regulation that has potential for exploitation as a therapeutic target.
Group 11 Amidinates and Guanidinates: Potential Precursors for Vapour Deposition

Several guanidinates of copper and silver, as well as amidinates and guanidinates of gold were synthesized as potential precursors for vapour deposition methods. These compounds were found to be dimers in the case of copper and gold, and trimers in the case of silver. The copper compounds showed good thermal and photostability, and were isolable by sublimation. The silver compounds proved to be very reactive to both heat and light, and were found to deposit silver metal when heated, suggesting that these sensitive compounds might be used as single source precursors. The gold compounds were found to exhibit some heat and light sensitivity, but were much more stable than their silver counterparts. Specifically, [Au(NiPr)2NMe2]2 (8) was found to be sublimable at 85 °C and 20 mTorr, and deposited gold metal under higher temperatures. These metal-depositing thermal reactions were thought to abstract a hydrogen from the guanidinate ligand, which acts as the reducing agent. Interestingly, the gold amidinate compounds were found to produce diisopropylcarbodiimide when heated, suggesting that these compounds deinsert carbodiimide rather than abstract a hydrogen atom from the ligand.
Humanity Can Still Stop Climate Change by Implementing a New International Climate Agreement and Applying Radical New Technology

There is a broad consensus worldwide that anthropogenic climate change is a scientific fact. Likewise, the fact is that the UN’s efforts to address climate change over the last 28 years have not been successful enough. It is evident that the global average temperature is on the rise (1.1 °C above pre-industrial levels in 2019). A particular concern comes from the fact that the Paris Agreement on keeping increases in the global average temperature to below +2 °C is an unenforceable ambition, since the focus is more on consequences than causes. In addition, economic policies regarding global taxes, as well as adaptation and mitigation measures, are questionable, as there is no evidence that changes in the climate system will proceed at the same rate in the coming years. This paper proposes an engineering approach that considers all relevant aspects of the climate change problem and proposes a new policy, named the “Climate New Deal”. It deals with: (i) Reorientation from a high-carbon economy to a green economy; (ii) The intensive use of radically new technology, e.g., “Seawater Steam Engine” technology for the simultaneous production of thermal and electric energy and drinking water; and (iii) The intensive use of energy efficient technologies and RES technologies, especially in transport.
The Best of Both Worlds: Context-Powered Word Embedding Combinations for Longitudinal Text Analysis

We propose a series of methods for combining word embeddings trained on small corpora with stable embeddings from a large reference corpus, with the express purpose of preserving certain properties present in the smaller text corpora. Our methods aim to leverage i) the specificity of the representation of certain terms in a word embedding based on a small corpus pertaining to a specific subject matter while ii) transferring the stability provided by vector representations learned from a larger corpus (e.g., Wikipedia). We achieve this aim by quantifying the relevance of a word to the corpus as well as evaluating the stability of its context within the original corpus. From the scores obtained for each word, we obtain a stable—yet specific—vector that is based on a weighted combination of the aligned base vector (obtained from a large corpus) and the more specific vector (learned from a smaller corpus). We evaluate our method on state-of-the-art semantic tasks and show that we are able to retain the stability of the original corpus. In order to evaluate that our methods further retain the specificity of certain terms in the original subject matter, we demonstrate that our method aids interdisciplinary analytical tools leveraging and comparing word embeddings for researchers in other domains, such as in the understanding of the evolution of public debates on economic issues over time.
NBER WORKING PAPER SERIES SOCIAL MEDIA AND THE BEHAVIOR OF POLITICIANS: EVIDENCE FROM FACEBOOK IN BRAZIL

We study the relationship between the spread of social media platforms and the communication and responsiveness of politicians towards voters, in the context of the expansion of Facebook in Brazil. We use self-collected data on the universe of Facebook activities by federal legislators and the variation in access induced by the spread of the 3G mobile phone network to establish three sets of findings:(i) Politicians use social media extensively to communicate with constituents, finely targeting localities while addressing policy-relevant topics; (ii) They increase their online engagement, especially with places where they have a large pre-existing vote share; but (iii) They shift their offline engagement (measured by speeches and earmarked transfers) away from connected municipalities within their base of support. Our results suggest that, rather than increasing responsiveness, social media may enable politicians to solidify their position with core supporters using communication strategies, while shifting resources away towards localities that lag in social media presence. Pedro Bessone Uber Technologies pedrobtepedino@gmail.com Filipe R. Campante School of Advanced International Studies (SAIS) and Department of Economics Johns Hopkins University 1740 Massachusetts Ave NW Washington, DC 20036 and NBER fcampante@jhu.edu Claudio Ferraz Vancouver School of Economics University of British Columbia 6000 Iona Drive Vancouver, BC V6T 1L4 and PUC-Rio and also NBER claudio.ferraz@ubc.ca Pedro Souza Queen Mary University of London School of Economics and Finance London E1 4NS United Kingdom p.souza@qmul.ac. uk
2020 Sequestered Data Evaluation for Known Activities in Extended Video: Summary and Results

This paper presents a summary and results for the ActEV’20 SDL (Activities in Extended Video Sequestered Data Leaderboard) challenge that was held under the CVPR’20 ActivityNet workshop [38]. The primary goal of the challenge was to provide an impetus for advancing research and capabilities in the field of human activity detection in untrimmed multi-camera videos. Advancements in activity detection will help with a wide range of public safety applications. The challenge was administered by the National Institute of Standards and Technology (NIST), where anyone could submit their system which run on sequestered data with the resulting score posted to a public leaderboard. Ten teams submitted their systems for the ActEV’20 SDL competition on the Multiview Extended Video with Activities (MEVA) test set with 37 target activities. The performance metric for the leaderboard ranking is the partial, normalized Area Under the Detection Error Tradeoff (DET) curve (nAUDC). The top rank on activity detection was by UCF at 37%, followed by CMU at 39% and OPPO at 41%.
Response to two Reviewers and Editor

In May 2012, we conducted a hydrographic survey over the Carlsberg Ridge in the northwest Indian Ocean. In this paper, we use these station data, in combination with some free-floating Argo profiles, to obtain the sectional temperature and salinity fields, and subsequently, the hydrographic characteristics are comprehensively analyzed. Through the basic T-S diagram, three salty water masses, Arabian Sea High-Salinity Water, Persian Gulf Water, and Red Sea Water, are identified. The sectional data show a clear ventilation structure associated with Arabian Sea High-Salinity Water. The 35.8 psu salty water 5 sinks at 6.9N and extends southward to 4.4N at depths around the thermocline, where the thermocline depth is in the range of 100 to 150 m. This salty thermocline extends much further south than the climatology indicates. Furthermore, the temperature and salinity data are used to compute the absolute geostrophic current over the specific section, and the results show mesoscale eddy vertical structure different from some widely used oceanic reanalysis data. We also find a west-propagating planetary wave at 6N, and the related features are described in terms of phase speed, horizontal and vertical structures. 10
University of Groningen Effects of aerobic exercise and cognitively engaging exercise on cardiorespiratory fitness and motor skills in primary school children

This paper examined effects of two interventions on cardiorespiratory fitness and motor skills, and whether these effects are influenced by baseline levels, and dose of moderate-to-vigorous physical activity (MVPA) during the intervention. A cluster randomized controlled trial was implemented in 22 schools (n = 891; 9.2 ± 07 years). Intervention groups received aerobic or cognitively engaging exercise (14-weeks, four lessons per week). Control groups followed their regular physical education programme. Cardiorespiratory fitness, motor skills and MVPA were assessed. Multilevel analysis showed no main effects on cardiorespiratory fitness and motor skills although the amount of MVPA was higher in the aerobic than in the cognitively engaging and control group. Intervention effects did not depend on baseline cardiorespiratory fitness and motor skills. Children with a higher dose of MVPA within the intervention groups had better cardiorespiratory fitness after both interventions and better motor skills after the cognitively engaging intervention. In conclusion, the interventions were not effective to enhance cardiorespiratory fitness and motor skills at a group level, possibly due to large individual differences and to a total dose of MVPA too low to find effects. However, the amount of MVPA is an important factor that influence the effectiveness of interventions. ARTICLE HISTORY Accepted 27 April 2020
A global characterization and similarity analysis of two-dimensional potential energy surfaces

Potential energy surfaces can be classified into combinatiorial equivalence classes, based on their partitioning into catchment regions. Two classification theorems are proven: one for reaction spheres and another for reaction tori. A method for constructing all possible equivalence classes of reaction spheres and reaction tori is presented. As illustration of the general results, it is shown that not all the two-dimensional reaction spheres are combinatorially equivalent to polyhedra in the three-dimensional Euclidean space. As examples, several reaction spheres are calculated by using the RHF method at the 3-21G* level, describing the interactions between a series of polyatomic ions and H+. The calculations show that the potential energy surface of the CO …H+ interaction, combinatorially equivalent to that of the NO−3 …H+ interaction, is not combinatorially equivalent to any polyhedron in 3-space; however, the combinatorially different potential energy surface of the PO … H+ interaction is equivalent to a polyhedron in 3-space. The topological classification scheme is proposed for the study of similarities between various families of chemical reactions.
THE IMPACT OF DIFFERENT URBAN LAND USE TYPES ON AIR POLLUTION IN THE MEGACITY OF SÃO PAULO

Both human and natural processes influence air pollution in megacities. Analysis of sixteen years of pollutants from four monitoring sites (vehicular, commercial, residential and urban background (U-BG)) in the greater São Paulo Metropolitan Area found significant differences in pollutant concentrations according to land use types in all temporal scales of analysis (from diurnal to monthly time series). In the diurnal/weekly cycles, concentrations of primary pollutants are two to three times higher in the vehicular and residential sites, compared to the U-BG site, where ozone (O3) is almost 50% higher. In the seasonal scale, carbon monoxide (CO) concentrations increase 80% due to land use differences, and about 55% due to seasonaity. Seasonal variations of nitrogen monoxide (NO) and O3 are of comparable magnitude to land use differences. For coarse particulate matter (PM10) and nitrogen dioxide (NO2),seasonal differences are greater than land use differences. In the longer time series, the U-BG site shows stronger and statistically significant correlations between the monthly time series of outgoing longwave radiation (OLR) and O3 (0.48) and MP10 (0.37), compared to the vehicular site (0.33 and 0.22, respectively). ese resultsconfirms that urban activity and land useplay a significant role in pollutant concentrations for all scales of analysis, though its influence becomes less pronounced with increasingly larger temporal scales, as air quality shis from a human-induced to a natural-induced system. ese findings may have implications for future decision-making and environmental, public health and transportation policies for similar megacitiesinvolving land use change.
Digital technologies in the context of university transition and disability: Theoretical and empirical advances

Since transition to higher education emerged as a research topic in the early 1970s, scholarly inquiry has focused on students without impairments and, what is more, little attention has been paid to the role of digital technologies. This article seeks to address this knowledge gap by looking at the university experiences of a group of first-year students with vision impairments from New Zealand, and the way they use digital tools, such as social media and mobile devices, to manage their transition-related challenges. The article summarises the findings from a longitudinal qualitative project which was methodologically informed by action research (AR). The article explores and discusses scholarly inquiry of transition to university and introduces a conceptual framework which includes five overlapping stages, the transition issues faced by the students and the roles played by digital technologies. The article updates and expands the theoretical understanding of transition to higher education and provides empirical evidence for practitioners to support the needs, inclusion, and participation of young people with disabilities in the tertiary setting.
A revised MRCI-algorithm coupled to an effective valence-shell Hamiltonian. II. Application to the valence excitations of butadiene

In Paper I of this work we have sketched an improved MRCI algorithm and its coupling to the effective valence-shell Hamiltonian OM2. To check the quality of the resulting OM2/MRCI approach, it is applied here to the excited valence states of all-trans butadiene. As is explained by a review of previous theoretical work, proper descriptions of these states posed severe problems within correlated ab initio treatments but seemed to be trivial within simple correlated π-electron models. We now show that an extended MRCI treatment of the correlations among all valence electrons as described by OM2 closely reproduces the experimental evidence, placing the vertical 2 1Ag excitation by about 0.2 eV below the 1 1Bu excitation. By an analysis of σ–π interactions we explain the corresponding earlier success of correlated π-electron theory. Exploiting the enhanced capabilities of the new approach we investigate the potential surfaces. Here, OM2/MRCI is shown to predict that the 2 1Ag state is energetically lowered abo.
Conducting polyaniline-graphene oxide fibrous nanocomposites: preparation, characterization and simultaneous electrochemical detection of ascorbic acid, dopamine and uric acid

Polyaniline/graphene oxide (PANI-GO) fibrous nanocomposites have been prepared and the electrochemical catalytic activity towards the electro-oxidation of ascorbic acid (AA), Dopamine (DA) and Uric acid (UA) has been investigated. The nanocomposites were synthesized via an in situ chemical polymerization method. The morphology, composition, thermal and electrochemical properties of the resulting nanocomposites were characterized by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, FT-IR spectroscopy, thermo gravimetric analysis and cyclic voltammetry. The catalytic behavior of PANI-GO nanocomposite modified glassy carbon electrode (GCE) towards AA, DA and UA has been investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV). The PANI-GO/GCE showed excellent catalytic activity towards electrochemical oxidation of AA, DA and UA compared to the bare GCE. The electrochemical oxidation signal of AA, DA and UA are well separated into three distinct peaks with peak potential separation of 343 mV, 145 mV and 488 mV between AA-DA, DA-UA and AA-UA respectively in CV studies and the corresponding peak potential separation in DPV mode are 320 mV, 230 mV and 550 mV. Under the optimized DPV experimental conditions, the peak current of AA, DA and UA give linear response over the range of 25–200 μM (R2 = 0.9955), 2–18 μM (R2 = 0.9932) and 2–18 μM (R2 = 0.9902) with detection limit of 20 μM, 0.5 μM and 0.2 μM at S/N = 3, respectively. The attractive features of PANI-GO provide potential applications in the simultaneous detection of AA, DA and UA. The excellent electrocatalytic behavior of PANI-GO may lead to new applications in electrochemical analysis.
DIGITAL LEADERSHIP PRACTICES: A SOCIAL INTELLIGENCE PERSPECTIVE

The digital transformation of the workplace impacts all involved individuals, including leaders, who have to balance institutionally implemented traditional organizational structures and new ways of working, enabled by digital platforms and (often) needed by their employees. Studies show that many leaders are still struggling to find their new individual leadership role and interaction style in the openness of the digital work environment. With this study, we want to contribute to a better understanding of actual digital leadership practices, i.e. how the digitization of the workplace changes leadership styles and approaches. Based on the theoretical lens of social intelligence, we identify five interwoven categories of digital leadership practices through a rigorous literature review and empirically refine them through a focus group as well as an illustrative case study: communicating, adapting, listening, understanding, and empathizing. Framing digital leadership through the lens of social intelligence allows us to emphasize the human perspective of this reconfiguration, which goes beyond ‘rewiring’ the work environment and acknowledges the fact that digital leaders need to learn socially intelligent behaviors.
DO NETWORKS MATTER FOR INNOVATION? THE USEFULNESS OF THE ECONOMIC NETWORK APPROACH IN ANALYSING INNOVATION

Economic network theory emphasises the importance of external resource mobilisation. In this paper, the relations between the mobilisation and use of internal and external resources in innovation processes, and the innovative performance of ®rms, are explored empirically, using an adapted version of Ha Êkansson's (1987) economic network model. The main research question was: to what extent do network variables contribute to the innovative performance of ®rms? To answer this question, we assessed the explanatory power of economic network theory within the empirical study of innovation. Firms were found to engage in various con®gurations of internal and external resource bases, enabling them to innovate with better results. The relations in the estimated models are strongly in ̄uenced by moderating variables such as sector, and type and level of innovations produced. Our main conclusion is that models that include both internal and external resources explain the innovative performance better than models in which only internal resources are used.
An assessment of transformation strategies in South Africa: A multi-case study of the accounting, financial services, government, and construction sectors

Globally, transformation is etched in all sectors of the economy. In the South African context, transformation is viewed as the catalyst to address the country’s socio-economic problems and their associated impact on different sectors and the economy at large. However, progress on transformation within the built environment has been slow in comparison with other sectors of the economy. As a result, this has led to a need to examine the transformation processes in the country. This article aims to analyse transformation strategies as conceptualised and implemented by various sectors. The article is based on a multi-case study of identified sectors and organisations that have developed and implemented transformation strategies. The materials used to conduct the study include sector transformation strategies, charters, journal articles, articles published in reputable South African newspapers, Acta Structilia 2019: 26(2) 72 organisation reports, information publicly available on the internet, and interviews conducted with sector representatives. The findings show that, for all sectors, transformation strategies are driven through skills development of human resources, with a view to redressing historical imbalances and providing equal opportunities. The process of strategy development involves sectorwide participation and having a champion for the strategy. In order to ensure that strategies are implemented, specific structured training and education programmes from the grassroots to professional level, as well as monitoring of progress are emphasised. Recommendations are made in line with the findings in order to guide the Council for the Built Environment in the development of a strategy for the built environment.