bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bridging Data Communities: Interoperability through inclusive, cross-institutional collaboration
Authors: Sackmann Anna , Ngo Lisa , Smith Elliott , Coleman Misha 
Published: November 2024

Objectives: To demonstrate how librarians can use engagement strategies to foster the exchange of knowledge and skills for data analysis and to build bridges between data communities. A second objective is to help student instructors to develop effective live-coding pedagogical practices and to gain practical experience in leading participatory workshop sessions.
Methods: Librarians developed a low-barrier introductory peer-to-peer data science workshop series to support students seeking to develop coding, data analysis, and visualization skills, with a focus on Python and SQL. We guided undergraduate peer instructors in participatory live-coding pedagogy, organized practice sessions for instructors, and managed the scheduling, logistics, outreach, and hosting of the workshops.
Results: In Fall 2023 sessions in the workshop series were delivered synchronously to over 100 participants, including students from our home institution and more than a dozen community colleges; one workshop was delivered twice—once in English, once in Spanish. Workshop recordings posted online have been viewed over 1000 times.
Conclusions: We successfully identified strategies for building upon existing relationships and strengthening connections among diverse data communities; designing programs and outreach efforts to lower barriers to participation in data science; and fostering a culture of diversity, equity, and inclusion in data science knowledge sharing.
Entente sur mesures volontaires au Québec : portrait des familles et modification des mesures en protection de la jeunesse
Authors: Lessard Julie , Simard Marie-Claude , Poitras Karine , Chateauneuf Doris , Lemardelet Laura 
Published: November 2024

Objectifs. En protection de la jeunesse, l’entente sur mesures volontaires (EMV) doit être privilégiée avant d’emprunter la voie judiciaire. Bien qu’elle soit largement utilisée au Québec, peu d’études se sont intéressées aux caractéristiques des familles suivies assujetties à cette mesure. Ainsi, cette étude exploratoire vise d’une part à dresser le portrait des enfants et des familles bénéficiant d’une EMV ainsi qu’à identifier les caractéristiques associées à un changement de l’EMV vers des mesures judiciaires. Méthode. L’échantillon de l’étude comprend 312 enfants et leurs parents pris en charge par le CIUSSS de la Capitale-Nationale dans le cadre d’une EMV. Les données sont extraites du système Projet Intégration Jeunesse (PIJ). Résultats. Les résultats de l’étude mettent en évidence quelques distinctions chez les parents concernés par l’EMV dont une plus grande proportion de familles intactes, de revenus provenant de l’emploi et ayant au moins une difficulté de fonctionnement (91,9 % des mères et 84,3 % des pères). Les motifs de compromission les plus fréquents sont la négligence et les risques sérieux de négligence. L’âge des parents contribue à diminuer la probabilité d’une modification du cadre légal alors que le placement de l’enfant avant l’EMV, le TDAH de la mère et le cumul des difficultés de fonctionnement du père augmentent cette probabilité. Discussion. Cette étude représente une première avancée dans la recherche sur ce sujet. Des études plus larges sont nécessaires pour obtenir une image complète des familles en EMV au Québec et comprendre les raisons sous-jacentes à la modification du cadre légal.
Points de vue d’adolescents en difficulté d’adaptation sur un projet d’intervention psychosociale par la nature et l’aventure : quelles signifiances et quelles retombées ?
Authors: Bergeron Geneviève , Rojo Sébastien , Massé Line , Brochu Marilyn 
Published: November 2024

Les formes moins conventionnelles d’intervention psychosociale obtiennent de plus en plus d’attention dans la perspective de soutenir les adolescents présentant des difficultés d’adaptation socioémotionnelles et comportementales pour qui l’école devient trop souvent source de méfiance, voire de souffrance. Cet article découle d’une recherche-action-formation réalisée en partenariat avec une école secondaire dans le but de soutenir des adolescents présentant d’importantes difficultés d’adaptation socioémotionnelles et comportementales par le biais d’une programmation d’intervention psychosociale par la nature et l’aventure (IPNA). Afin de dégager les retombées du programme d’intervention ainsi que les facteurs pouvant influencer ces dernières, nous avons cherché à répondre aux questions suivantes : quelles sont les aspects du projet les plus signifiantes pour les jeunes et qu’est-ce qui y contribue ? Quelles sont les retombées perçues du projet d’IPNA ? Accordant une grande valeur à la voix des jeunes encore trop peu représentée dans la recherche, nous avons réalisé des entrevues individuelles avec dix adolescents âgés de 15 à 18 ans et avons procédé à des analyses descriptives inductives. Pour ces populations vulnérables, les résultats dévoilent le rôle important du plaisir, de la mise à distance du quotidien difficile et du soutien du groupe devenu catalyseur de relations plus positives et nourrissantes. Leurs propos mettent en lumière que certains défis vécus et surmontés perturbent l’image négative qu’ils ont d’eux-mêmes et constituent des leviers à la (re) prise de confiance en leurs capacités.
Stable Sulfur‐Intercalated 1T′ MoS2 on Graphitic Nanoribbons as Hydrogen Evolution Electrocatalyst
Authors: Ekspong Joakim , Sandström Robin , Rajukumar Lakshmy Pulickal , Terrones Mauricio , Wågberg Thomas , Gracia‐Espino Eduardo 
Published: October 2018

AbstractThe metastable 1T′ polymorph of molybdenum disulfide (MoS2) has shown excellent catalytic activity toward the hydrogen evolution reaction (HER) in water‐splitting applications. Its basal plane exhibits high catalytic activity comparable to the edges in 2H MoS2 and noble metal platinum. However, the production and application of this polymorph are limited by its lower energetic stability compared to the semiconducting 2H MoS2 phase. Here, the production of stable intercalated 1T′ MoS2 nanosheets attached on graphitic nanoribbons is reported. The intercalated 1T′ MoS2 exhibits a stoichiometric S:Mo ratio of 2.3 (±0.1):1 with an expanded interlayer distance of 10 Å caused by a sulfur‐rich intercalation agent and is stable at room temperature for several months even after drying. The composition, structure, and catalytic activity toward HER are investigated both experimentally and theoretically. It is concluded that the 1T′ MoS2 phase is stabilized by the intercalated agents, which further improves the basal planes′ catalytic activity toward HER.
Donor Conjugated Polymers with Polar Side Chain Groups: The Role of Dielectric Constant and Energetic Disorder on Photovoltaic Performance
Authors: Xu Bing , Yi Xueping , Huang Tzu‐Yen , Zheng Zilong , Zhang Junxiang , Salehi Amin , Coropceanu Veaceslav , Ho Carr Hoi Yi , Marder Seth R. , Toney Michael F. , Brédas Jean‐Luc , So Franky , Reynolds John R. 
Published: October 2018

AbstractTo better understand the correlation of the dielectric properties with the photovoltaic response in conjugated polymer:fullerene bulk heterojunction materials, the concept of introducing minimal structural change is employed to increase the polymer dielectric constant via polar cyano groups added to the end of butyl or octyl side chains in the poly(dithienosilole‐thienopyrrolodione) system. Density functional theory calculations confirm that the polar groups do not affect the polymer electronic structure but can lead to an increase in overall dipole moment depending on the polymer chain conformation. Despite the increased dielectric constant (from 2.7 to 4.3 for cyano‐octyl side chains and from 2.7 to 3.2 for the cyano‐butyl analogues), the device characteristics employing the cyano‐containing polymers are inferior to those of the devices made with unfunctionalized alkyl chains. It is found that the hole mobilities for the cyano‐containing polymers are two orders of magnitude lower compared to those for the parent polymers and suggest this is due to an increase in energetic disorder caused by the strong local permanent dipoles associated with the cyano groups. The study highlights the complexity in the relationship between the dielectric constant of organic materials, the morphologies that are induced, and their photovoltaic performance.
Thickness‐Dependent Facet Junction Control of Layered BiOIO3 Single Crystals for Highly Efficient CO2 Photoreduction
Authors: Chen Fang , Huang Hongwei , Ye Liqun , Zhang Tierui , Zhang Yihe , Han Xiaopeng , Ma Tianyi 
Published: October 2018

AbstractThin layer fabrication and crystal facet engineering favor the prompt charge transfer from bulk to the surface of a material and spatial charge separation among different facets, tremendously benefitting photocatalytic activity. However, the thickness and surface facet composition are considered as two entwined characteristics of layered materials with well‐defined and tunable shapes, which possess great promise to achieve the simultaneous manipulation of charge transfer and spatial separation. Herein, it is demonstrated that one solution for the aforementioned issue by controllably regulating the surface {010}/{100} facet junctions of a layered thickness‐tunable bismuth‐based material, BiOIO3. The attenuation in thickness of BiOIO3 nanoplates shortens the diffusion pathway of charge carriers, and more importantly the tuning of nanolayer thickness renders the ratio variation of the top {010} facet to the lateral {100} facet, which dominates the spatial separation of photogenerated electrons and holes. As a result, the highest CO evolution rate from CO2 reduction over BiOIO3 nanoplates with the optimal thickness and ratio of exposed facets reaches 5.42 µmol g−1 h−1, over 300% that of the bulk counterpart (1.77 µmol g−1 h−1). This work paves a new way for governing charge movement behaviors on the basis of the synergistic engineering of layer structure and exposing facets.
Thin‐Film Electrode Design for High Volumetric Electrochemical Performance Using Metal Sputtering‐Combined Ligand Exchange Layer‐by‐Layer Assembly
Authors: Ko Yongmin , Kwon Minseong , Song Yongkwon , Lee Seung Woo , Cho Jinhan 
Published: October 2018

AbstractThe design of electrode with high volumetric performance in energy storages still remains as a significant challenge because it simultaneously requires a high packing density of active materials for high energy density and a conductive porous structure for facile charge transfer. Here, a novel assembly process is introduced for thin‐film anodes for Li‐ion battery with a high volumetric energy density and rate performance by systematically controlling the interfacial structure between metal‐oxide nanoparticles and/or metal clusters. For this study, oleic‐acid‐stabilized Fe3O4 nanoparticles are layer‐by‐layer assembled with small organic molecules through a ligand exchange reaction, which enable a high packing density. During layer‐by‐layer deposition, periodic Pt‐sputtering onto multilayers significantly reduces the internal resistance of the electrodes but maintains the nanopores formed among the nanoparticles. The resulting anode exhibits an extremely high volumetric capacity of ≈3195 mA h cm−3 and rate performance, which are far superior to that reported for Li‐ion battery anodes. Additionally, all components in the electrodes have a stable covalent bond network between the metal atom and the amine group of organic molecule linker, allowing good cycle retention. This approach can be widely applied to the fabrication of various nanoparticle‐based electrodes, enabling maximum charge storage performance in confined volumes.
Decoupling Ionic and Electronic Currents in Melanin
Authors: Sheliakina Margarita , Mostert Albertus Bernardus , Meredith Paul 
Published: October 2018

AbstractMelanin, the human skin pigment, has emerged as a model material for bioelectronic interfaces due to its biocompatibility, ability to be processed into electronic‐device‐grade thin films, and transducing charge transport properties. These charge transport properties have been suggested to be of a mixed protonic/electronic nature, regulated by a redox reaction that can be manipulated by changing the material's hydration state. However, to date, there are no detailed reports which clarify, quantify, or disentangle the protonic and electronic contributions to long‐range current conduction in melanin. Described herein, is a systematic hydration controlled electrical study on synthetic melanin thin films utilizing impedance/dielectric spectroscopy, which rationally investigates the protonic and electronic contributions. Through modeling and inspecting the frequency dependent behavior, it is shown that the hydration dependent charge transport is due to proton currents. Results show a real dielectric constant for hydrated melanin of order ≈1 × 103. Surprisingly, this very high value is maintained over a wide frequency range of ≈20–104 Hz. The electronic component appears to have little influence on melanin's hydration dependent conductivity: thus the material should be considered a protonic conductor, and not as previously suggested, a mixed protonic/electronic hybrid.
Preservation of Blood Vessels with an Oxygen Generating Composite
Authors: Zhang Huaifa , Dalisson Benjamin , Tran Simon , Barralet Jake 
Published: October 2018

AbstractDamage caused by oxygen deficiency (hypoxia) is one of the major factors limiting tissue and organ preservation time. Cooling tissues slows down metabolic rate of cells thereby prolonging tissue and organ survival sufficiently to allow transport and transplantation within a few hours. Although metabolism is slowed, cells and some enzymes continue to consume oxygen that can render cold stored tissues hypoxic. Here, an oxygen‐generating composite (OGC) with sustained oxygen release is reported for ex vivo blood vessel preservation. Aorta segments are cultured under hypothermia for 25 days in vascular preservation media. The presence of OGC increases cell viability from 9 ± 6% to 96 ± 3% and retains 65 ± 8% of original KCl stimulated contractile force after 25 days compared with 25 ± 4% in controls. Culture for 7 days in nitrogen demonstrates proof‐of‐concept for normothermic blood vessel preservation, OGC increases the cell viability from 45 ± 15% to 78 ± 2%, and KCl stimulates contractile force from 49 ± 7% to 95 ± 8%, respectively. Oxygen release materials then may have a role in augmenting current preservation techniques.
Hollow Micro/Nanostructured Ceria‐Based Materials: Synthetic Strategies and Versatile Applications
Authors: Wang Zumin , Yu Ranbo 
Published: October 2018

AbstractHollow micro/nanostructured CeO2‐based materials (HMNCMs) have triggered intensive attention as a result of their unique structural traits, which arise from their hollowness and the fascinating physicochemical properties of CeO2. This attention has led to widespread applications with improved performance. Herein, a comprehensive overview of methodologies applied for the synthesis of various hollow structures, such as hollow spheres, nanotubes, nanoboxes, and multishelled hollow spheres, is provided. The synthetic strategies toward CeO2 hollow structures are classified into three major categories: 1) well‐established template‐assisted (hard‐, soft‐, and in situ template) methods; 2) newly emerging self‐template approaches, including selective etching, Ostwald ripening, the Kirkendall effect, galvanic replacement, etc.; 3) bottom‐up self‐organized formation synthesis (namely, oriented attachment and self‐deformation). Their underlying mechanisms are concisely described and discussed in detail, the differences and similarities of which are compared transversely and longitudinally. Niche applications of HMNCMs in a wide range of fields including catalysis, energy conversion and storage, sensors, absorbents, photoluminescence, and biomedicines are reviewed. Finally, an outlook of future opportunities and challenges in the synthesis and application of CeO2‐based hollow structures is also presented.
Nanoparticle‐Conjugate TLR7/8 Agonist Localized Immunotherapy Provokes Safe Antitumoral Responses
Authors: Nuhn Lutz , De Koker Stefaan , Van Lint Sandra , Zhong Zifu , Catani João Portela , Combes Francis , Deswarte Kim , Li Yupeng , Lambrecht Bart N. , Lienenklaus Stefan , Sanders Niek N. , David Sunil A. , Tavernier Jan , De Geest Bruno G. 
Published: October 2018

AbstractLocalized therapeutic modalities that subvert the tumor microenvironment from immune‐suppressive to pro‐immunogenic can elicit systemic antitumor immune responses that induce regression of directly treated as well as nontreated distal tumors. A key toward generating robust antitumor T cell responses is the activation of dendritic cells (DCs) in the tumor microenvironment. Treatment with agonists triggering various pattern recognition receptors is very efficient to activate DCs, yet suffers from the induction of serious immune‐related adverse effects, which is closely linked to their unfavorable PK/PD profile causing systemic immune activation and cytokine release. Here, it is reported that nanoparticle conjugation of a highly potent TLR7/8 agonist restricts immune activation to the tumor bed and its sentinel lymph nodes without hampering therapeutic antitumor efficacy. On a mechanistic level, it is confirmed that localized treatment with a nanoparticle‐conjugated TLR7/8 agonist leads to potent activation of DCs in the sentinel lymph nodes and promotes proliferation of tumor antigen‐specific CD8 T cells. Furthermore, therapeutic improvement upon combination with anti‐PDL1 checkpoint inhibition and Flt3L, a growth factor that expands and mobilizes DCs from the bone marrow, is demonstrated. The findings provide a rational base for localized tumor engineering by nanomedicine strategies that provide spatial control over immune‐activation.
Molybdenum Carbide Nanodots Enable Efficient Electrocatalytic Nitrogen Fixation under Ambient Conditions
Authors: Cheng Hui , Ding Liang‐Xin , Chen Gao‐Feng , Zhang Lili , Xue Jian , Wang Haihui 
Published: October 2018

AbstractElectrocatalytic nitrogen fixation is considered a promising approach to achieve NH3 production. However, due to the chemical inertness of nitrogen, it is necessary to develop efficient catalysts to facilitate the process of nitrogen reduction. Here, molybdenum carbide nanodots embedded in ultrathin carbon nanosheets (Mo2C/C) are developed to serve as a catalyst candidate for highly efficient and robust N2 fixation through an electrocatalytic nitrogen reduction reaction (NRR). The as‐synthesized Mo2C/C nanosheets show excellent catalytic performance with a high NH3 yield rate (11.3 µg h−1 mg−1
Mo2C) and Faradic efficiency (7.8%) for NRR under ambient conditions. More importantly, the isotopic experiments using 15N2 as a nitrogen source confirm that the synthesized ammonia is derived from the direct supply of nitrogen. This result also demonstrates the possibility of high‐efficiency nitrogen reduction even though accompanied with vigorous hydrogen evolution.
Efficient Nonfullerene Organic Solar Cells with Small Driving Forces for Both Hole and Electron Transfer
Authors: Chen Shangshang , Wang Yuming , Zhang Lin , Zhao Jingbo , Chen Yuzhong , Zhu Danlei , Yao Huatong , Zhang Guangye , Ma Wei , Friend Richard H. , Chow Philip C. Y. , Gao Feng , Yan He 
Published: October 2018

AbstractState‐of‐the‐art organic solar cells (OSCs) typically suffer from large voltage loss (Vloss) compared to their inorganic and perovskite counterparts. There are some successful attempts to reduce the Vloss by decreasing the energy offsets between the donor and acceptor materials, and the OSC community has demonstrated efficient systems with either small highest occupied molecular orbital (HOMO) offset or negligible lowest unoccupied molecular orbital (LUMO) offset between donors and acceptors. However, efficient OSCs based on a donor/acceptor system with both small HOMO and LUMO offsets have not been demonstrated simultaneously. In this work, an efficient nonfullerene OSC is reported based on a donor polymer named PffBT2T‐TT and a small‐molecular acceptor (O‐IDTBR), which have identical bandgaps and close energy levels. The Fourier‐transform photocurrent spectroscopy external quantum efficiency (FTPS‐EQE) spectrum of the blend overlaps with those of neat PffBT2T‐TT and O‐IDTBR, indicating the small driving forces for both hole and electron transfer. Meanwhile, the OSCs exhibit a high electroluminescence quantum efficiency (EQEEL) of ≈1 × 10−4, which leads to a significantly minimized nonradiative Vloss of 0.24 V. Despite the small driving forces and a low Vloss, a maximum EQE of 67% and a high power conversion efficiency of 10.4% can still be achieved.
Near‐Infrared Ternary Tandem Solar Cells
Authors: Li Yongxi , Lin Jiu‐Dong , Liu Xiao , Qu Yue , Wu Fu‐Peng , Liu Feng , Jiang Zuo‐Quan , Forrest Stephen R. 
Published: October 2018

AbstractThe paucity of near‐infrared (NIR) organic materials with high absorption at long wavelengths, combined with large diffusion lengths and charge mobilities, is an impediment to progress in achieving high‐efficiency organic tandem solar cells. Here a subcell is employed within a series tandem stack that comprises a solution‐processed ternary blend of two NIR‐absorbing nonfullerene acceptors and a polymer donor combined with a small‐molecular‐weight, short‐wavelength fullerene‐based subcell grown by vacuum thermal evaporation. The ternary cell achieves a power conversion efficiency of 12.6 ± 0.3% with a short‐circuit current of 25.5 ± 0.3 mA cm−2, an open‐circuit voltage of 0.69 ± 0.01 V, and a fill factor of 0.71 ± 0.01 under 1 sun, AM 1.5G spectral illumination. The success of this device is a result of the nearly identical offset energies between the lowest unoccupied molecular orbitals (LUMOs) of the donors with the highest occupied molecular orbital (HOMO) of the acceptor, resulting in a high open‐circuit voltage. A tandem structure with an antireflection coating combining these subcells demonstrates a power conversion efficiency of 15.4 ± 0.3%.
In Situ Li3PS4 Solid‐State Electrolyte Protection Layers for Superior Long‐Life and High‐Rate Lithium‐Metal Anodes
Authors: Liang Jianwen , Li Xiaona , Zhao Yang , Goncharova Lyudmila V. , Wang Gongming , Adair Keegan R. , Wang Changhong , Li Ruying , Zhu Yongchun , Qian Yitai , Zhang Li , Yang Rong , Lu Shigang , Sun Xueliang 
Published: October 2018

AbstractA thin and adjustable Li3PS4 (LPS) solid‐state electrolyte protection layer on the surface of Li is proposed to address the dynamic plating/stripping process of Li metal. The LPS interlayer is formed by an in situ and self‐limiting reaction between P4S16 and Li in N‐methyl‐2‐pyrrolidone. By increasing the concentration of P4S16, the thickness of the LPS layer can be adjusted up to 60 nm. Due to the high ionic conductivity and low electrochemical activity of Li3PS4, the intimate protection layer of LPS can not only prevent the formation of Li dendrites, but also reduces parasitic side reactions and improves the electrochemical performance. As a result, symmetric cells with the LPS protection layer can deliver stable Li plating/stripping for 2000 h. Full cells assembled with the LPS‐protected Li exhibit two times higher capacity retention in Li–S batteries (≈800 mAh g−1) at 5 A g−1 for over 400 cycles compared to their bare Li counterparts. Furthermore, high rate performances can be achieved with Li‐LPS/LiCoO2 cells, which are capable of cycling at rates as high as 20 C. This innovative and scalable approach to stabilizing the Li anode can serve as a basis for the development of next‐generation high‐performance lithium‐metal batteries.