1,721,294 research outputs found
Experimental Data_TGA_DSC_SEC_UV_PL_CD_Efficient Solution-Phase Synthesis of Sequence-DefinedOligourethanes with Precise Chirality Control
No full textThis dataset contains experimental raw data supporting the study on the efficient solution-phase synthesis of Fmoc-assisted stereo-controlled sequence-defined oligourethanes (SDOUs) with precise chirality control. The files include results from Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Size Exclusion Chromatography (SEC), UV-Vis absorption spectroscopy, Photoluminescence (PL) spectroscopy, and Circular Dichroism (CD) spectroscopy. All measurements were performed under controlled laboratory conditions, with detailed acquisition parameters provided in the file descriptions.</p
Toward Holistic Experience-Oriented Service Innovation: Co-Creating Sustainable Value With Customers and Society
No full textstatus: Publishe
Neutral, Cationic, and Anionic Low-Spin Iron(III) Complexes Stabilized by Amidophenolate and Iminobenzosemiquinonate Radical in N,N,O Ligands
No full textA brownish-black complex [Fe-III(L)(2)] (1) (S = 0), supported by two tridentate redox-active azo-appended o-amidophenolates [H2L = 2-(2-phenylazo)-anilino-4,6-di-tert-butylphenol], has been synthesized and structurally characterized. In CH2Cl2 1 displays two oxidative and two reductive 1e(-) redox processes at E-1/2 values of 0.48 and 1.06 V and -0.42 and -1.48 V vs SCE, respectively. The one-electron oxidized form [1](+) isolated as a green solid [Fe-III(L)(2)][BF4] (2) (S = 1/2) has been structurally characterized. Isolation of a dark ink-blue one-electron reduced form [1](-) has also been achieved [Co-III(eta(5)-C10H15)(2)][Fe-III(L)(2)] (3) (S = 1/2). Mossbauer spectral parameters unequivocally establish that 1 is a low-spin (LS) Fe-III complex. Careful analysis of Mossbauer spectral data of 2 and 3 at 200 and 80 K reveal that each complex has a major LS Fe-III and a minor LS Fe-II component (redox isomers): [Fe-III{(L-ISQ)(-center dot)}(2)](+) and [Fe-II{(L-IBQ)(0)}{(L-ISQ)(-center dot)}](+) (2) and [Fe-III{(L-AP)(2-)}(2)](-) and [Fe-II{(L-ISQ)(-center dot)}{(L-AP)(2-)}](-) (3). Notably, for both at 8 K mainly the major component exists. Broken-Symmetry (BS) Density Functional Theory (DFT) calculations at the B3LYP level reveals that in 1 the unpaired electron of LS Fe-III is strongly antiferromagnetically coupled with a pi-radical of o-iminobenzosemiquinonate(1-) (L-ISQ)(-center dot) form of the ligand, delocalized over two ligands providing 3- charge (X-ray structure). DFT calculations reveal that the unpaired electron in 2 is due to (L-ISQ)(-center dot) [LS Fe-III (S-Fe = 1/2) is strongly coupled to one of the (L-ISQ)(-center dot) radicals (S-rad = 1/2)] and 3 is primarily a LS Fe-III complex, supported by two o-amidophenolate(2-) ligands. Time-Dependent-DFT calculations shed light on the origin of UV-vis-NIR spectral absorptions for 1-3. The collective consideration of Mossbauer, variable-temperature (77-298 K) electron paramagnetic resonance (EPR), and absorption spectral behavior at 298 K, and DFT results reveals that in 2 and 3 the valence-tautomerism is operative in the temperature range 80-300 K
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Leading Pedestrian Interval Implementation as a Marginal Costs and Benefits Problem
Full text linkTo improve the safety of people walking at particular signalized intersections, traffic signal engineers may implement leading pedestrian intervals (LPI) to provide pedestrians with a walk signal for a few seconds prior to the parallel vehicular green indication. Previous research using before-after studies and simple economic analyses shows that LIPs are low cost tools that can reduce vehicle-pedestrian conflicts and crashes at some signalized intersections. Despite this evidence, there is a little guidance for municipalities on when to implement LPIs. this paper develops a marginal costs and benefits framework using quantitative metrics, extending the concept of traffic conflicts and marginal safety-delay tradeoffs to analyze the appropriateness of implementing an LPI at specific signalized intersections. The guidance provided by this method helps quantify the probability of a conflict happening, and provides direction on whether or not to implement an LPI at a given location based upon macroscopic level inputs, including turning movement counts, crash data, and geometry. A case study with sample data indicates that an LIP is cost effective for the scenario presented.This paper was peer-reviewed by TRB and presented at the 96th Annual Meeting of the Transportation Research Board, Washington, D.C. It can be cited as: Sharma, Anuj, Edward Smaglik, Sirisha Kothuri, Oliver Smith, Peter Koonce, and Tingting Huang, "Leading Pedestrian Interval Implementation as a Marginal Costs and Benefits Problem." No. 17-05116. 2017. Posted with permission.</p
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
The Impact of bioenergy on the EU energy security: A comprehensive analysis
No full textBioenergy has received less attention in recent times due to its changing negative image. For the EU, bioenergy was considered mostly for its contribution to greening and diversifying its energy mix. While its impact on CO2 emissions is hotly debated, there is a dearth of studies regarding the energy security implications of bioenergy in the EU. This opens up a window of opportunities and challenges to perform such a study. The main research question of this thesis is:What has been the impact of bioenergy on the energy security for the EU from 2000 to 2018?The main research question and the sub-research questions are addressed in the context of the EU economy and its vision for climate mitigation. The thesis starts with the literature review of energy security leading up to framing a new theoretical framework. Past implications of bioenergy that includes biofuels in the last decade and a half since 2000 have been analyzed. The thesis has assessed what bioenergy has delivered in that time. Positive and negative developments are taken into account and analyzed with respect to the selected energy security indicators and metrics.Both ES literature and PEST tool have been employed to narrow down the data gathering and relevance of energy security indicators for bioenergy. The use of the PEST analysis tool also offers a unique combination of elements in the framework and a boarder categorization, which in traditional energy security is often not employed.To get a better overview of EU bioenergy, a review of the current policy of the EU for bioenergy has been done. It presents all relevant data related to bioenergy like various bioenergy potential, total energy consumption, and demand, etc. Then, different characteristics and features of bioenergy are described along with the various conversion routes to obtain different forms of energy (namely biofuels, bio-electricity, and bio-heat) are explained. Some of the projections for 2020 for bioenergy in the EU have also been provided to better gauge the state of availability of resources and likely policy direction taken in the future. The effects on the energy security indicators of bioenergy in the EU have been derived from the data on EU bioenergy and is assessed with respect to the 22 selected energy security indicators and metrics from the analytical framework. A rating of 3.0 here implies no or a little effect for energy security indicator or metric on account of bioenergy, anything above 3.0 is positive, and below 3.0 implies a negative impact. It is found that the overall effects have been slightly positive with an average rating of 3.09 for all the 22 selected ES indicators. With 3.5, for the dimension of ‘technology development and efficiency’, it has a positive effect implying an increase in employment in the bio-sector and high research budget for bioenergy from 2000-2018. However, with a score of 2.9 for the dimension of ‘Environmental & social sustainability’, the effects have been overall negative, implying a negative impact on the environment in the last 18 years.Electrical Engineering | Sustainable Energy Technolog
From moon landing to metaverse: Tracing the evolution of Technological Forecasting and Social Change
Full text linkTechnological Forecasting and Social Change (TFSC) is one of the most prominent journals to focus on the methodologies and practices of technological forecasting and futures studies. This study aims to analyse the topical structure of TFSC and track the most cited articles published in the journal using a combination of a structural topic model (STM) and bibliometric analysis. The STM reveals 18 prominent topics in TFSC, and the topical quality of the STM results is verified based on semantic coherence and topic exclusivity scores as well as an assessment of the correlations among topics. The STM also tracks the temporal variations in topical prevalence that occurred from 1969 to 2022, shedding light on the changing popularity of each topic. The bibliometric analysis presents a decade-by-decade perspective on the most cited articles and the geographical dispersion of authors affiliated with TFSC, thereby providing a truly global perspective on the journal's publishing activity
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