bluuebunny/crossref_metadata_2025 huggingface dataset:
Andere Stimmen – Protest gegen Krieg und Gewalt in der polnischen und ukrainischen Dichtung über den Ersten Weltkrieg
Authors: Woldan Alois
Published: October 2019

Polish and Ukrainian poetry on World War I have much in common: they were written mainly by soldier-poets, young men fighting in the Polish Legions or the Ukrainian Sich Riflemen. This poetry is, first of all, a patriotic legitimation of the war as a way of regaining political independence. Heroism and suffering for the fatherland are dominating issues. Nevertheless, besides this pathetic gesture, we can find voices that point out the horror of war and question it at all. Such criticisms is expressed by certain motives, which appear in both the Legions’ and the Sich Riflemens’ poetry, like: fratricide, lists from soldiers to their families at home, devastation of nature and culture, autumn and death, as well as pacifist notions. These voices do not form any dominant discourse in the poetry on World War I, but they are not to be ignored, as they mark a common place in the Polish and Ukrainian literature at this time, which has not been researched until now.
DEEP TISSUE MASSAGE AND FLEXIBILITY IN THE STRUCTURAL COMPONENTS OF THE SUPERFICIAL BACK LINE OF PROFESSIONAL VOLLEYBALL PLAYERS: A PILOT STUDY
Authors: Mroczek Agata
Published: October 2019

Abstract
Virtual Treatments in an Integrated Primary Care-Behavioral
Health Practice: An Overview of Synchronous Telehealth Services to Address
Rural-Urban Disparities in Mental Health Care
Authors: Hills William E.
Published: October 2019

Abstract
Tie Strength in Co-authorship Social Networks: Analyses, Metrics and a New Computational Model
Authors: Brandão Michele A. , Moro Mirella M.
Published: October 2019

The study of social ties has lead to build rigorous models that reveal the evolution of social networks and their dynamism. A property related to social ties is the strength of ties, which has been largely explored in different contexts, such as information diffusion, analyses of patterns in communication logs and evaluation of scientific researchers productivity. Specially, analyzing tie strength allows investigating how distinct relationships play different roles and identifying impact at micro-macro levels in the network. We present and propose different ways to measure the strength of co-authorship ties in non-temporal and temporal real academic social networks. Specially, tie strength can be measured by topological and semantic properties, as well as their combination. Finally, this thesis reveals different concepts that define tie strength and properties that influence it, along with metrics, algorithms and a classification for distinct relationships.
iAWARE: Um modelo para Cuidado ubíquo de Pacientes com Transtornos de Ansiedade, Depressão e Estresse utilizando Gamificação e Biodata
Authors: Dias Lucas Pfeiff er Salomão , Barbosa Jorge Luis Victória
Published: October 2019

Depression and anxiety are the most prevalent mental disorders, reaching million people worldwide. As they share many characteristics these two disorders can manifest themselves together. In addition, stress is one of the related factors with both depression and anxiety, being relevant in the analysis of these disorders. This paper proposes a model for ubiquitous care of patients with depression, anxiety and stress disorders (DASD) using gamification and biodata, called iAware. A/B tests evaluated with a clinical population the interaction engagement of the patient to the treatment provided by gamification. Based on the patient’s history, the iAware monitors and applies interventions for the patient at the most appropriate time. Six patients used a prototype with a smartband for two weeks to evaluate iAware. Interactions with intervention stages were greater in patients who used iAware gamified. A more detailed analysis is still required. The evaluated patients got more occurrences of anxiety at home. The patients also filled out a survey based on the Technology Acceptance Model (TAM). TAM results show that patients have found the iAware useful in their anxiety treatment routines.
Sara - A Semi-Automatic Framework for Social Network Analysis
Authors: Barbosa Carlos , Félix Lucas , Vieira Vinícius , Xavier Carolina
Published: October 2019

Understanding the dissemination of information in social networks has become essential for modern societies. These networks have dramatically changed the mode of communication, relationship, marketing, and access to information. Platforms such as Twitter, and WhatsApp are some representatives of these new information propagation media that represented a major shift in a model centered on traditional communication vehicles. This new decentralized environment gave voice to marginalized groups, riots such as the Arab Spring, growth of populist parties and false news waves across the globe. Therefore, considering the influence of these platforms in several aspects of society, this work presents a framework for characterizing the diffusion of information in social networks, especially on Twitter. This characterization is accomplished through the use of complex network and text mining techniques, exploring the generation of a retweets network, the formation of communities around specific users, cascades of information, analysis of feelings and modeling of topics. As an evaluation this model is applied in characterizing a network of retweets generated around the discussion of pension reform of Brazil on Twitter.
PipaBot: um canal de comunicação para o PIPA UFRJ
Authors: Paula Lucas S. de , Gonçalves Taisa G. , Fernandes Thatiana V. R. B. , Travassos Guilherme H.
Published: October 2019

Chatbots make use of natural language processing to establish dialogues with people. They can be used as channels that facilitate communication between humans and entities (companies, social projects, research projects, hospitals, schools/universities, etc.). The PipaBot is a chatbot that was built to facilitate the communication between the mothers (expected two thousand participants) and researchers from the Childhood and Environmental Pollutants Project (PIPA-UFRJ). It was built following an incremental and iterative way and used the Botpress framework. The chatbot is available in two versions: Facebook Messenger and PIPA-UFRJ website. The actions provided by PipaBot are (i) registration of a project participant; (ii) information about the project, medical consultations, and result of medical exams, among others. The PipaBot was evaluated following the Technological Acceptance Model (TAM) with 13 participants, and the initial results provided evidence of user satisfaction regarding its acceptance.
Projeto experimental de colaboração entre a produção audiovisual do TCE-PB e de estudantes da rede pública
Authors: Gonçalves Sandro , Souza Helder Bruno A. M. de , Carolino Fábia , Kulesza Raoni , Toscano Rafael M. , Becker Valdecir
Published: October 2019

This paper describes an experimental videocolaboration project that integrates productions of institutional videos from the Court of Auditors of the State of Paraíba (TCE-PB) to non-professional production provided by public school students. Public school students are invited by teachers to produce videos before meeting TCE-PB’s facilities. This content production feeds two applications: a collaborative map and a lecture support system. The last one focuses on assisting the institution's staff to deliver presentations at the Court's auditorium in the preparation of customized materials for each school visit. During the preparation process, the speaker can include in his presentation videos produced by students and available in a public database. Finally, the system gathers the video files, school data, and students participating in the auditorium dynamics into a single media that can be played and shared at the end of the event. This research is based on and uses Audiovisual Design workflow as a methodological route.
A mechanism for automatic preparation of media objects in Ginga-NCL
Authors: Josué Marina I. P. , Moreno Marcelo F. , Santos Joel A. F. dos , Muchaluat-Saade Debora C.
Published: October 2019

This contribution proposes a mechanism for automatic preparation of media objects incorporated in Ginga-NCL. In the automatic preparation, the middleware Ginga-NCL builds a preparation plan based on the network conditions and the presentation behaviour gathered from the multimedia document that defines the application. The automatic preparation of media objects aims to reduce or avoid synchronization faults during the presentation of distributed multimedia applications.
NCL: Storing ambient settings in media node
Authors: Barreto Fabio , Montevecchi Eyre Brasil B. , Abreu Raphael , Santos Joel A. F. dos , Muchaluat-Saade Debora C.
Published: October 2019

This proposal consists of adding one more type of variable storage setting node, called “x-ncl-ambient-settings,” which stores environment information. This information may come from sensors in the physical ambient that must update this data periodically or as defined by the author of the NCL document. These variables can be used by NCL links or procedural code to drive application behavior based on the perceived environment information.
Providing Multimodal User Interaction in NCL
Authors: Barreto Fábio , Montevecchi Eyre Brasil B. , Abreu Raphael , Santos Joel A. F. dos , Muchaluat-Saade Debora C.
Published: October 2019

This proposal consists of extending NCL events and connectors to provide multimodal user interaction in NCL, creating new types of events such as touch, motion, eyeMotion, pointer, voiceRecognition, gestureRecognition and faceRecognition. New predefined roles, such as onTouch, onMotion, onEyeMotion, onPointer, on- VoiceRecognition, onFaceRecognition and onFaceRecognition are provided to express connector conditions.
H.761 Support of a DOM Level 4 Core specification in NCLua scripts
Authors: Guedes Alan L. V. , Colcher Sergio
Published: October 2019

Web developers commonly run HTML template engines at the client-side using JavaScript. One upper hand is to give more development flexibility comparing to the server-side. In this way, we may cite web frameworks webcomponents, ReactJS, Vue, and others. Those frameworks use the DOM API to access the template data inserted in the HTML document. Then the same DOM API is used to insert more HTML code. Currently, NCL not support access to the current document. But it can modify the document by NCL Editing commands in NCLua scripts. We propose NCLua scripts partially support the DOM Code API.
H.761 Support of a New concept Element and a New "recognition" Node-Event to Enable Deep Learning-based Analyses for Media-Nodes
Authors: Busson Antônio , Guedes Alan L. V. , Colcher Sergio
Published: October 2019

Machine Learning field, methods based on Deep Learning (e.g. CNN, RNN) becomes the state-of-the-art in several problems of the multimedia domain, especially in audio-visual tasks. Typically, the training of Deep Learning Methods is done in a supervised manner, and it is trained on datasets containing thousands/millions of media examples and several related concepts/classes. During training, the Deep Learning Methods learn a hierarchy of filters that are applied to input data to classify/recognize the media content. In computer vision scenario, for example, given image pixels, the series of layers of the network can learn to extract visual features from it, the shallow layers can extract lower-level features (e.g. edges, corner, contours), while the deeper combine these features to produce higher-level features (e.g. textures, part of objects). These representative features can be clustered into groups, each one representing a specific concept. H.761 NCL currently lacks support for Deep Learning Methods inside their application specification. Because those languages still focus on presentations tasks such as capture, streaming, and presentation. They do not consider programmers to describe the semantic understanding of the used media and handle recognition of such under-standing. In this proposal, we aim at extending NCL to provide such support. More precisely, our proposal able NCL application support: (1) describe learning-based on structured multimedia datasets; (2) recognize content semantics of the media elements in presentation time. To achieve such goals, we propose, an extension that includes: (a) the new "knowledge" element describe concepts based on multimedia datasets; (b) "area" anchor with an associated "recognition" event that describes when a concept occurrences in multimedia content.
H.761 Support of a new SigGen Media Type to Enable Inaudible Sound Data Communication
Authors: Guedes Alan L. V. , Colcher Sergio
Published: October 2019

Current consumer devices, such as TVs, smartphones, smartwatches,etc., often come with built-in support for radio-frequency (RF) wireless communication. This support requires RF hardware and de-ends on technologies such as Bluetooth, IEEE 802 WiFi, or 4Gmobile networks. There are situations, however, where the RF data network is not available, or where it is more advantageous to use some other form of wireless communication. One alternative communication through inaudible sound. The same consumer devices that come with RF support usually come equipped with speakers and microphones which enables them to produce and detect inaudible sound. By inaudible sound, we mean sound waves in frequencies that cannot be heard by humans—usually those above 19–22 kHz. Many works in the literature that show that communication through inaudible sound is feasible on consumer-grade PCs, laptops, and smartphones. Here we are mainly concerned with the applicability of this technique to enable inaudible sound applications in the Ginga-NCL engines. This way, we propose a new type of media object called SigGen.
Performance Comparison of Evolutionary Algorithms in the Design of a Hand-Pump Shape Microstrip Antenna for 5G Applications
Authors: Kaur Navneet , Sharma Surbhi , Kaur Jaswinder
Published: October 2019

In this work, a single element hand-pump shape microstrip patch antenna working at 3.4 GHz–3.8 GHz for future 5G applications is proposed. The overall dimensions of the proposed antenna are 34 mm × 28 mm × 1.6 mm. In order to obtain the desired bandwidth, three rectangular slots are etched from the radiating element along with the utilization of the defected ground structure. To optimize the geometrical parameters of the proposed antenna, performance comparison of various optimization techniques viz. Particle Swarm Optimization, Bat algorithm, Differential Evolution, and Artificial Bee Colony algorithm are presented. The performance of the antenna is analyzed with the help of S-parameter, gain, and radiation efficiency. The proposed antenna is resonant at 3.6 GHz with an impedance bandwidth of 400 MHz and the radiation efficiency of 74 %, which is quite appropriate for a single element 5G antenna. Further, the suggested antenna is fabricated and experimentally tested for the validation of results.
A qualitative study of the experiences and information needs of public health inspectors that inspect small drinking water systems in Ontario, Canada
Authors: Pons Wendy , Jones-Bitton Andria , Lam Steven , McEwen Scott A. , Pintar Katarina , Young Ian , Papadopoulos Andrew
Published: October 2019

Public health inspectors (PHIs) play an important role in enforcing the regulation and monitoring of approximately 9000 small noncommunity drinking water systems across Ontario. These small drinking water systems (SDWS) are diverse and face unique challenges. The purpose of this research was to explore PHIs’ insights and needs related to these SDWS in Ontario, Canada, to inform future policy and training initiatives to support safe drinking water. Data were collected through teleconference-conducted focus groups. Transcripts were analyzed and three major themes were found: the operator–PHI relationship, PHI training and information needs, and operational challenges. Overall, participants reported that they felt confident in their ability to inspect SDWSs. Main concerns to water safety were the technical ability of the water operator to manage their water supply and the impact of having a long time period between inspections of water systems. Future research should explore the cost-benefit of increasing inspection frequency in SDWSs and a variety of training and education initiatives for PHIs and operators of SDWSs.
Filosofia Africana: um estudo sobre a conexão entre ética e estética
Authors: Paula Naiara , Wer Claudia
Published: October 2019

O artigo articula a relação da Ética com a Estética Africana através de dois conceitos de base ancestral defendidos por expoentes do pensamento africano nos textos: “Complementaridade Binária” de Sophie Bosede Oluwole e “Kugusa Mtima” de Dona Marimba Richards. O texto analisa aspectos vitais da cosmovisão Africana que reverberam na produção ético-estética dos povos Africanos e destaca o papel primordial da vida espiritual para a experiência Africana, sobretudo, nos desafios contemporâneos, como forma de afirmação e construção de uma consciência nacional.
Filosofia da Macumba: a sacralização do corpo do negro na poética de Solano Trindade
Authors: Malomalo Bas'Ilele
Published: October 2019

Esse trabalho analisa a quarta e quinta estrofes do poema “Macumba” de Trindade. Defende que esse poeta negro usa a estética poética, pautando-se nas religiões de matrizes africanas, para enfrentar o paradigma branco-racista que reduz o corpo negro à vadiagem. Trindade interpreta o corpo negro como um corpo sagrado e convida para a prática de uma política filosófica que valoriza a vida em todas suas manifestações.
Na travessia o negro se desfaz: vida, morte e memÓRÍa , possíveis leituras a partir de uma filosofia africana e afrodiaspórica
Authors: Pessanha Eliseu Amaro De Melo , Paz Francisco Phelipe Cunha , Saraiva Luís Augusto Ferreira
Published: October 2019

O presente trabalho tem como objetivo apresentar o conceito de MemÓRÍa, ainda em desenvolvimento, que possui suas bases em ontologias africanas e afrodiaspóricas para compreender as dimensões do ethos africano de vida. Ainda, neste sentido, o artigo se debruça sobre o conceito de Travessia, onde a experiência histórica do corpo negro transpõe elementos que ainda necessitam ser trabalhados e revisitados. Sendo assim, o trabalho também busca compor uma contribuição aos estudos de Filosofia(s) Africana(s) e afrodiaspóricas não mais a partir do campo da justificativa do que seja “Filosofia africana”, mas toma as Filosofia(s) Africana(s) como um conhecimento já estabelecido e que se permite na construção de novos conceitos e no questionamento dos mesmos.
Políticas do amor e sociedades do amanhã
Authors: Silva Vinícius Rodrigues Costa da , Nascimento Wanderson Flor do
Published: October 2019

Partindo do cenário atual das sociedades de inimizade, tal como teorizado por Achille Mbembe, este texto segue os argumentos de Bell Hooks para pensar em uma política do amor que possa aparecer como um antídoto para os males causados pelas sociedades da inimizade que se sustentam em uma imagem da alteridade experimentada desde a figura do inimigo a ser combatido, mortificado, morto. Ao valorizar o amor como uma prática - e não somente como sentimento - que envolva o cuidado, a responsabilidade, afeto, reconhecimento, confiança, respeito, comunicação franca, sustentamos a necessidade da construção de outro modelo de sociedade guiado pela prática do amor, as sociedades do amanhã, que apresente para a experiência das pessoas negras, rotineiramente violada pelo racismo, outro jeito de estar no mundo, considerando o espírito, entendido por Sobonfu Somé como dimensão da existência que necessita do caráter coletivo das relações, como pilar incontornável.
MORFOLOŠKE KARAKTERISTIKE KAO PREDIKTORI SITUACIONE USPJEŠNOSTI U VATERPOLU
Authors: Janjić Boris , Gardašević Novica , Trivun Milomir
Published: October 2019

Na uzorku 39 vaterpolista, uzrasta 12 godina (± 6 mjeseci) sprovedeno je istraživanje sa ciljem da se utvrdi uticaj morfoloških karakteristika na situacionu uspješnost u vaterpolu. U radu je primijenjen set od 12 antropometrijskih mjera kao prediktorski set varijabli, dok su kriterijske varijable činili situaciono motorički testovi; brzina plivannja na 25 metara sa i bez lopte, vertikalni skok iz vode i bočno plivanje 8 puta 2,5 metara. Na osnovu dobijenih rezultata zaključeno je da su morfološke karakteristike znatno uticale na izvođenje situaciono motoričkih zadataka u vaterpolu, u zavisnosti od testa od 39% do čak 71%. Kao najznačajnije primijenjene varijable iz morfološkog prostora vaterpolista izdvojile su se varijable; obim grudnok koša, visina tijela, širina šake i stopla sa pozitivnim efektom, dok su težina tijela i potkožno masno tkivo bili otežavajući faktori za izvođenje situaciono motoričkih zadataka kod dvanaestogodišnjih vaterpolista.
MAIN DETERMINANTS OF YOUTH LABOUR MARKET IN SELECTED SEE COUNTRIES AND THE CASE OF MACEDONIA
Authors: Trpeski Predrag , Cvetanoska Marijana
Published: October 2019

The aim of this paper is to elabourate the youth on the labour market in selected South-East European countries with special emphaisis on Macedonia and particular reference to their present state. The analysis of Macedonian youth employment is accomplished with their educational and economic structure. The situation of the global youth employment remains unstable. Problems of long job progression and a lack of stable employment for youth exist almost all around the world. As a part of the labour force, young people can significantly contribute for increasing the economic development of the country with their knowledge and abilities. Methods of analyses and synthesis, deduction and induction, as well as descriptive statistics and comparison methods will be implemented in this research. The situation of young people on the labour market in Macedonia is illustrated by paralleling with labour market indicators at national level, as well as with South-East European countries. Recent researches show that many youth in the SEE region are not active in the labour market and Macedonian youngsters aged between 15 and 24 years old are more likely to be unemployed compared to the other age groups. Labour market in Macedonia is characterized by a relatively low activity of youth. The youth activity rate in Macedonia is lower than the European Union and the average activity rate in Western Balkan countries.
INSTITUTIONS AND INTRA-REGIONAL TRADE IN CEFTA 2006: A GRAVITY APPROACH
Authors: Klimczak Łukasz , Trivić Jelena
Published: October 2019

The purpose of this paper is to identify factors that had an influence on bilateral trade flows among the CEFTA countries with special emphasize: 1) on the role of CEFTA agreement and its preceding network of bilateral free trade agreements, and 2) on the role of institutions in facilitating intra-regional trade. In order to assess the impact of these variables on trade, we employed an augmented gravity model based on panel data of the CEFTA countries in fifteen years period (2000-2014). The results of the research suggest that there was a positive and statistically significant role of the CEFTA agreement on trade between its parties but the influence of the preceding bilateral free trade agreements was even higher. Results also showed that institutions can play an important role as trade facilitators, but mainly in the importing country while in the exporting country only three of six variables showed to have a positive sign.
THE RISE AND THE FALL OF THE GREEK ECONOMY DURING THE 1950-2017 PERIOD AND THE ISSUE OF TOURISM - SOME LESSONS FOR MODERN ECONOMIES
Authors: Economou Emmanouil M. L.
Published: October 2019

This paper analyses in brief Greek economy during the 1950-2017 period. The paper analyses the reasons that lead to the economic development (1950-1980) and the reasons that were responsible for the period of economic and systemic inconsistencies which followed, that lead, at first, to economic stagnation, then to the deterioration of the macroeconomic figures of the Greek economy during the 1981-2009, and finally, to the era of the memoranda (2010-17), which is related to the current deep economic recession that the Greek society faces. Then the paper analyses the main economic characteristics of tourism in Greece and explains why tourism is an important aspect of the Greek economy and why it can play a significant role as regards to the recovery of the Greek economy since 2010 and afterwards.
RISK DISCLOSURES IN FINANCIAL STATEMENTS OF BANKS IN BOSNIA AND HERZEGOVINA
Authors: Pobrić Amira
Published: October 2019

This study examines the practice of disclosing risk information in the financial statements of banks in Bosnia and Herzegovina. The research is carried out using the content analysis. The aim of the research is to determine the volume and characteristics of risk disclosures. The results of research show that banks in Bosnia and Herzegovina disclose less risk information than banks in developed countries, such as Canada and the UK. Most information is disclosed about credit risk. More quantitative than qualitative data is disclosed. The banks are focused on providing mandatory risk disclosures but they do not provide all mandatory disclosures. They primarily disclose past and time-neutral risk information. They are more likely to disclose positive and neutral news about risk exposure and risk management rather than negative news.
Ten common statistical mistakes to watch out for when writing or reviewing a manuscript
Authors: Makin Tamar R , Orban de Xivry Jean-Jacques
Published: October 2019

Inspired by broader efforts to make the conclusions of scientific research more robust, we have compiled a list of some of the most common statistical mistakes that appear in the scientific literature. The mistakes have their origins in ineffective experimental designs, inappropriate analyses and/or flawed reasoning. We provide advice on how authors, reviewers and readers can identify and resolve these mistakes and, we hope, avoid them in the future.
A neural mechanism for contextualizing fragmented inputs during naturalistic vision
Authors: Kaiser Daniel , Turini Jacopo , Cichy Radoslaw M
Published: October 2019

With every glimpse of our eyes, we sample only a small and incomplete fragment of the visual world, which needs to be contextualized and integrated into a coherent scene representation. Here we show that the visual system achieves this contextualization by exploiting spatial schemata, that is our knowledge about the composition of natural scenes. We measured fMRI and EEG responses to incomplete scene fragments and used representational similarity analysis to reconstruct their cortical representations in space and time. We observed a sorting of representations according to the fragments' place within the scene schema, which occurred during perceptual analysis in the occipital place area and within the first 200 ms of vision. This schema-based coding operates flexibly across visual features (as measured by a deep neural network model) and different types of environments (indoor and outdoor scenes). This flexibility highlights the mechanism's ability to efficiently organize incoming information under dynamic real-world conditions.
A novel GIS-based ensemble technique for flood susceptibility mapping using evidential belief function and support vector machine: Brisbane, Australia
Authors: Shafapour Tehrany Mahyat , Kumar Lalit , Shabani Farzin
Published: October 2019

In this study, we propose and test a novel ensemble method for improving the accuracy of each method in flood susceptibility mapping using evidential belief function (EBF) and support vector machine (SVM). The outcome of the proposed method was compared with the results of each method. The proposed method was implemented four times using different SVM kernels. Hence, the efficiency of each SVM kernel was also assessed. First, a bivariate statistical analysis using EBF was performed to assess the correlations among the classes of each flood conditioning factor with flooding. Subsequently, the outcome of the first stage was used in a multivariate statistical analysis performed by SVM. A highest prediction accuracy of 92.11% was achieved by an ensemble EBF-SVM—radial basis function method; the achieved accuracy was 7% and 3% higher than that offered by the individual EBF method and the individual SVM method, respectively. Among all the applied methods, both the individual EBF and SVM methods achieved the lowest accuracies. The reason for the improved accuracy offered by the ensemble methods is that by integrating the methods, a more detailed assessment of the flooding and conditioning factors can be performed, thereby increasing the accuracy of the final map.
Molecular/Nanostructured Functional Metal Oxide Stacks for Nanoscale Nanosecond Information Storage
Authors: Balliou Angelika , Skarlatos Dimitrios , Papadimitropoulos Giorgos , Vouroutzis Nikolaos Z. , Boukos Nikos , Glezos Nikos
Published: October 2019

The metal oxide heterostructures market is exponentially growing, adhering to the trend of achieving fabrication versatility on a vast range of nonconventional electromagnetic and optical properties. A high degree of substrate tolerance and solution‐phase growth potential promise low‐cost flexible electronics and silicon‐based process compatibility. A molecule‐based complex oxide nanostructured stack integrated in an electro‐optically operable nonvolatile two‐terminal capacitive memory element is proposed. The cell demonstrates a remarkably high > 7 V memory window and write–read times down to 10 ns, promising for reliable high‐speed storage. Molecular orbital occupancy through broadband optical stimulus enables simultaneous phononic addressing and boosts the written information amount by up to 37%, achieving 10+ years storage duration. The resulting nonvolatile memories are the first‐documented complementary metal oxide semiconductor (CMOS)‐compatible long‐term‐retention molecular capacitive cell of its kind, implementing inherent structure‐emerging heat management. Great potential emerges for numerous energy‐inspired innovations, enabling functional oxide–molecular hybrids exploitation as high‐end nonvolatile memory products.
General Solvothermal Synthesis Method for Complete Solubility Range Bimetallic and High‐Entropy Alloy Nanocatalysts
Authors: Bondesgaard Martin , Broge Nils Lau Nyborg , Mamakhel Aref , Bremholm Martin , Iversen Bo Brummerstedt
Published: October 2019

Nanoalloys (NAs) have extraordinary catalytic properties, but metals are often immiscible giving compositional limits on catalytic design. It is generally believed that solution‐based chemical synthesis is inadequate for obtaining NAs, and often exotic shock synthesis or severe decomposition or reduction reactions are required. However, such methods only work on the laboratory scale making real‐world applications difficult. Here, a general solvothermal method is reported to obtain phase‐pure bimetallic and high‐entropy nano‐alloys across the entire composition range. Tuning of solvent chemistry and precursors leads to six different bimetallic NAs: PdxRu1‐x, PtxRu1‐x, IrxRu1‐x, RhxRu1‐x, Ir1‐xPtx, and Rh1‐xPtx, without immiscibility regions. All samples have face‐centered‐cubic crystal structures, which have not previously been observed for the ruthenium‐based systems. Additionally, quaternary and quinary systems are produced, demonstrating the ability to obtain medium‐ and high‐entropy NAs. The method described herein provides a simple, general production method of previously unknown solid solutions throughout their entire composition range potentially allowing for detailed tuning of nanocatalyst properties.
Polymer Template Synthesis of Flexible BaTiO3 Crystal Nanofibers
Authors: Yan Jianhua , Han Yuhui , Xia Shuhui , Wang Xiao , Zhang Yuanyuan , Yu Jianyong , Ding Bin
Published: October 2019

BaTiO3 crystals are attractive materials due to their high dielectric properties, but they are brittle and inelastic ceramics, which limits their broader applications in emerging fields, such as flexible electronics. A scalable strategy for the fabrication of ultra‐flexible crystalline BaTiO3 nanofiber (NF) films by a sol–gel electrospinning method, followed by a brief calcination, is reported. It facilitates the formation of perovskite BaTiO3 crystals with intricate grain boundaries at a low temperatures by growing them within polymer NF templates. The ceramic films have a polymer‐like softness of 50 mN, a large Young's modulus of 61 MPa, and an elastic strain of 0.9%. Moreover, they have a low density of 28 mg cm−3 and demonstrate superior softness without fracture after deformation. Piezoelectric sensors fabricated based on these films exhibit a high sensitivity of 80 ms with an output voltage of 1.05 V at a pressure of 100 kPa. This approach allows for the large‐scale fabrication of flexible BaTiO3 crystal NF films.
2D Mechanical Metamaterials with Widely Tunable Unusual Modes of Thermal Expansion
Authors: Ni Xiaoyue , Guo Xiaogang , Li Jiahong , Huang Yonggang , Zhang Yihui , Rogers John A.
Published: October 2019

Most natural materials expand uniformly in all directions upon heating. Artificial, engineered systems offer opportunities to tune thermal expansion properties in interesting ways. Previous reports exploit diverse design principles and fabrication techniques to achieve a negative or ultralow coefficient of thermal expansion, but very few demonstrate tunability over different behaviors. This work presents a collection of 2D material structures that exploit bimaterial serpentine lattices with micrometer feature sizes as the basis of a mechanical metamaterials system capable of supporting positive/negative, isotropic/anisotropic, and homogeneous/heterogeneous thermal expansion properties, with additional features in unusual shearing, bending, and gradient modes of thermal expansion. Control over the thermal expansion tensor achieved in this way provides a continuum‐mechanics platform for advanced strain‐field engineering, including examples of 2D metamaterials that transform into 3D surfaces upon heating. Integrated electrical and optical sources of thermal actuation provide capabilities for reversible shape reconfiguration with response times of less than 1 s, as the basis of dynamically responsive metamaterials.
A Low‐Cost Laser‐Based Nano‐3D Polymer Printer for Rapid Surface Patterning and Chemical Synthesis of Peptide and Glycan Microarrays
Authors: Eickelmann Stephan , Tsouka Alexandra , Heidepriem Jasmin , Paris Grigori , Zhang Junfang , Molinari Valerio , Mende Marco , Loeffler Felix F.
Published: October 2019

A low‐cost laser‐based printing setup is presented, which allows for the spot‐wise patterning of surfaces with defined polymer nanolayers. These nanolayer spots serve as a “solid solvent,” embedding different chemicals, chemical building blocks, materials, or precursors and can be stacked on top of each other. By melting the spot pattern, the polymer‐embedded molecules are released for chemical reaction. This enables researchers to quickly pattern a surface with different molecules and materials, mixing them directly on the surface for high‐throughput chemical synthesis to generate and screen diverse microarray libraries. In contrast to expensive ink‐jet or contact printing, this approach does not require premixing of inks, which enables in situ combinatorial mixing. Easy access and versatility of this patterning approach are shown by generating microarrays of various biomolecules, such as glycans for the first time, to screen interactions of antibodies and lectins. In addition, a layer‐by‐layer solid‐phase synthesis of peptides directly on the microarray is presented. Amino acid–containing nanolayers are repeatedly laser‐transferred and reacted with the functionalized acceptor surface in defined patterns. This simple system enables a reproducible array production, down to spot‐to‐spot distances of 100 µm, and offers a flexible and cheap alternative to expensive spotting robot technology.
Synthesis of Isoxazolines from Nitroalkanes via a [4+1]‐Annulation Strategy
Authors: Ushakov Pavel Yu. , Khatuntseva Elizaveta A. , Nelyubina Yulia V. , Tabolin Andrey A. , Ioffe Sema L. , Sukhorukov Alexey Yu.
Published: October 2019

A novel access to isoxazolines was developed using the [4+1]‐annulation of α‐keto‐stabilized sulfur ylides with N,N‐bis(siloxy)enamines derived from aliphatic nitro compounds. The resulting 5‐keto‐substituted isoxazolines were shown to be convenient precursors of polysubstituted 3‐hydroxypyrrolidines via the one‐pot catalytic N−O hydrogenolysis/intramolecular reductive amination sequence. Application of this approach to the formal synthesis of Merck's potent NK1 receptor antagonist was demonstrated.

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Large‐Spin‐Gap Nodal‐Line Half‐Metal and High‐Temperature Ferromagnetic Semiconductor in Cr2X3 (X=O,S,Se) Monolayers
Authors: Chen Jian‐Yong , Li Xing‐Xing , Zhou Wen‐Zhe , Yang Jin‐Long , Ouyang Fang‐Ping , Xiong Xiang
Published: October 2019

Two‐dimensional (2D), high‐temperature, half‐metal ferromagnetic semiconductors with large spin gap and topological band structures are highly desirable for novel nanoscale spintronic applications. A family of stable 2D honeycomb‐Kagome Cr2X3 (X=O,S,Se) monolayers is proposed through first‐principles calculations. Buckled Cr2O3 is a ferromagnetic semiconductor with large out‐of‐plane magnetocrystalline anisotropy energy and a predicted Curie temperature of 332 K under moderate biaxial tensile strain. Planar Cr2S3 and Cr2Se3 are ferromagnetic half‐metals with mirror‐symmetry‐protected nodal lines for spin‐down channel and large direct gap (4.59 and 4.76 eV) for spin‐up channel. The Fermi velocities for Cr2S3 and Cr2Se3 are 2.1×105 and 1.5×105 m s−1, respectively, which is comparable with that of silicene, 5.3 × 105 m s−1. Their Berezinskii–Kosterlitz–Thouless transition temperatures are determined to be as high as 445 and 695 K. In addition, their half metallicity can be well maintained on h‐BN nanosheets and is immune to chemical perturbation and mechanical strain. Its fascinating magnetic properties and topological nodal lines render 2D Cr2X3 (X=O,S,Se) suitable for novel spintronic devices and exotic quantum applications.
Extending the UNIFAC model for ionic liquid–solute systems by combining experimental and computational databases
Authors: Song Zhen , Zhou Teng , Qi Zhiwen , Sundmacher Kai
Published: October 2019

Considering that the predictive UNIFAC model is highly valuable for the solvent selection, process design and optimization of separation tasks, a large extension of this model to ionic liquid (IL)–solute systems is presented by combining experimental and COSMO‐RS derived databases. The experimental infinite dilution activity coefficient (γ∞) data of different solutes in ILs are first collected exhaustively to extend UNIFAC‐IL to cover all involved IL and conventional functional groups. Afterwards, the experimental and COSMO‐RS calculated γ∞ are compared for different types of solutes to evaluate the potential of using COSMO‐RS predictions as quasi‐experimental data for further UNIFAC‐IL extension. In the cases where COSMO‐RS can provide quantitatively accurate predictions after calibration, additional γ∞ database is specifically generated to regress more group interaction parameters in the UNIFAC‐IL model. Finally, a large experimental liquid–liquid and vapor–liquid equilibria database is collected and employed to evaluate the predictive performance of the obtained γ∞‐based UNIFAC‐IL model.
Trapping region of impinging jets in a cross‐shaped channel
Authors: Zhang Jing‐wei , Yao Tian‐liang , Li Wei‐feng , El Hassan Mouhammad , Xu Xin‐lei , Liu Hai‐feng , Wang Fu‐chen
Published: October 2019

This study follows our previous report (Zhang et al., Phys. Fluids, vol. 31, 2019, 034105) by describing the formation and evolution of the engulfment flow in the cross‐shaped channel. First, the flow regimes were studied by planar laser induced fluorescence (PLIF). Results show the formation of a spiral vortex in the center of the chamber and the appearance of a well‐mixed zone inside the spiral vortex. Second, we proposed a novel experimental method to analyze the residence time of the fluid in the chamber, and discover an unexpected trapping region inside the well‐mixed zone. There is almost no fluid transport into or out of this region. Furthermore, three‐dimensional numerical simulation is used to reveal the origination of this trapping region. Simulation results reveal that the fluid recirculates in the trapping region and the flow feature is caused by the bubble‐type vortex breakdown.
Adsorption of bark derived polyphenols onto functionalized nanocellulose: Equilibrium modeling and kinetics
Authors: Asante Bright , Sirviö Juho A. , Li Panpan , Lavola Anu , Julkunen‐Tiitto Riitta , Haapala Antti , Liimatainen Henrikki
Published: October 2019

This article describes the kinetics and capacity of adsorbing condensed conifer tannins onto cationic cellulose nanocrystals (CCNCs). Batch adsorption experiments were carried as a function of pH, contact time, and initial tannin concentration with constant cationic cellulose nanocrystal concentration (0.01%). The adsorption process was highly pH dependent as adsorption capacities ranged from 13.2 mg/g to 112.7 mg/g at pH of 3–10. The amount of tannin adsorbed per unit mass of the cationic cellulose nanocrystals increased with increasing of tannin concentration until equilibrium was attained. The experimental data followed the Langmuir adsorption model, and the maximum experimental and theoretical adsorption capacities for the cationic nanocrystals reached 1,008 mg/g and 1,111 mg/g, respectively. The kinetics of adsorption was described best by the pseudo‐second‐order kinetics indicating a chemisorption process. The inherent adsorption has interesting applications for CCNC‐complexes with natural polyphenolics in green chemical applications for adhesives, adsorbents, preservatives, and packaging materials.
Development of reaction–diffusion DFT and its application to catalytic oxidation of NO in porous materials
Authors: Liu Yu , Liu Honglai
Published: October 2019

The reaction–diffusion (RD) process is an important and complex subject that involves nonequilibrium modeling and multiscale calculations and may be applied to multiple fields. State‐of‐art theories are computationally too expensive for real‐world applications. We propose a novel classical density functional theory (CDFT) for RD modeling by combining ordinary time‐dependent density functional theory (TDDFT) and reaction kinetic models to examine the multiscale RD process. The theory is applied to NO oxidation in porous materials. The uptake, flux, and density profiles are examined, to reveal that the shape of the pore could influence the selectivity of adsorption between the reactant and product, which further leads to variations in the catalytic efficiency. It is noted that open pores are more favorable for catalytic reactions. The importance of adsorption is examined in the presence as well as the absence of pore–gas attraction. Without attraction, the catalytic efficiency is decreased by three orders of magnitude.
Barcoding Biological Reactions with DNA‐Functionalized Vesicles
Authors: Peruzzi Justin A. , Jacobs Miranda L. , Vu Timothy Q. , Wang Kenneth S. , Kamat Neha P.
Published: October 2019

Targeted vesicle fusion is a promising approach to selectively control interactions between vesicle compartments and would enable the initiation of biological reactions in complex aqueous environments. Here, we explore how two features of vesicle membranes, DNA tethers and phase‐segregated membranes, promote fusion between specific vesicle populations. Membrane phase‐segregation provides an energetic driver for membrane fusion that increases the efficiency of DNA‐mediated fusion events. The orthogonality provided by DNA tethers allows us to direct fusion and delivery of DNA cargo to specific vesicle populations. Vesicle fusion between DNA‐tethered vesicles can be used to initiate in vitro protein expression to produce model soluble and membrane proteins. Engineering orthogonal fusion events between DNA‐tethered vesicles provides a new strategy to control the spatiotemporal dynamics of cell‐free reactions, expanding opportunities to engineer artificial cellular systems.
Interplay Between J‐ and H‐Type Coupling in Aggregates of π‐Conjugated Polymers: A Single‐Molecule Perspective
Authors: Eder Theresa , Vogelsang Jan , Bange Sebastian , Remmerssen Klaas , Schmitz Daniela , Jester Stefan‐S. , Keller Tristan J. , Höger Sigurd , Lupton John M.
Published: October 2019

Strong dipole–dipole coupling within and between π‐conjugated segments shifts electronic transitions, and modifies vibronic coupling and excited‐state lifetimes. Since J‐type coupling between monomers along the conjugated‐polymer (CP) chain and H‐type coupling of chromophores between chains of a CP compete, a superposition of the spectral modifications arising from each type of coupling emerges, making the two couplings hard to discern in the ensemble. We introduce a single‐molecule H‐type aggregate of fixed spacing and variable length of up to 10 nm. HJ‐type aggregate formation is visualized intuitively in the scatter of single‐molecule spectra.
Quantification of the Charge Consuming Phenomena under High‐Voltage Hold of Carbon/Carbon Supercapacitors by Coupling Operando and Post‐Mortem Analyses
Authors: Przygocki Patryk , Ratajczak Paula , Béguin François
Published: October 2019

Enhancing the operating voltage of supercapacitors (SCs), hence their specific energy, is important. However, long‐term hold at high voltage entails loss of capacitance, increase of resistance and internal pressure. Such detrimental effects could be reduced by obtaining quantitative information on the relative impact of the various mechanisms leading to the worsening of the SCs performance. Now, for a carbon/carbon supercapacitor in aqueous Li2SO4, a self‐consistent approach is used to assign leaking charge during high voltage hold to the charge: 1) distributed throughout the electrochemical cell (steady‐state leakage current measurements), 2) spent at each electrode for gases production (operando electrochemical mass spectrometry (EMS) analysis and pressure records), 3) utilized to oxidize the electrodes surface (from post‐mortem surface functionality determination by temperature programmed desorption (TPD)), and 4) used for other parasitic reactions.
The Role of miR‐326 in Adipogenic Differentiation of Human Adipose‐Derived Stem Cells by Targeting C/EBPα in vitro
Authors: Feng Yanting , Zhou Lanting , Peng Yan , Yang Yuchao , Fan Tingyu , Jiang Xin , Dai Jingxing , Ouyang Jun
Published: October 2019

The CCAAT‐enhancer‐binding protein α (C/EBPα) plays an important role in adipogenic differentiation of adipose‐derived stem cells (ASC). Recent studies have shown that microRNAs (miRNAs) participate in the regulation of self‐renewal, proliferation, and multi‐directional differentiation of ASCs. In the present study, we analyzed the targeting miRNAs on C/EBPα and found that miR‐326 played an essential role in it. The results of qPCR confirmed that the expression of miR‐326 was reduced in adipogenic differentiation. In addition, the dual‐luciferase reporter assay system verified binding between miR‐326 and the 3′ untranslated region of C/EBPα. Furthermore, transfection of miR‐326 into human adipose‐derived stem cells caused a significant reduction in C/EBPα. Our results highlight the importance of miR‐326 in adipogenic differentiation and provide a reliable basis for clinical treatment of adipose‐related diseases. Anat Rec, 2019. © 2019 American Association for Anatomy Anat Rec, 303:2054–2060, 2020. © 2019 American Association for Anatomy