Miracle-dz/UniFAR-FTUs huggingface dataset:
Evaluation of similarities and differences of LiTaO3 and LiNbO3 based on high-T-conductivity, nonlinear optical fs-spectroscopy and ab initio modeling of polaronic structures

Different aspects of ferroelectric LiTaO3 (LT) such as polaronic defects, optical response and electrical conductivity are investigated by the most recent theoretical and experimental approaches. Comparing the results with the state-of-the-art knowledge of the widely studied LiNbO3 (LN), we evaluate the general assumption that there is little difference between the aforementioned properties of LT and LN. First-principles calculations reveal the existence of point defects in LT qualitatively compatible with the polaronic picture established in LN. Though, peculiar differences with respect to the individual binding energies and polaronic deformation can be revealed. Accordingly, (sub-)picosecond transient absorption measurements show pronounced differences in the kinetics in the sub-ps time domain of small polaron formation and, even more pronounced, in the long-term evolution identified with small polaron hopping. In contrast, (sub-)ps transient luminescence, attributed to the relaxation of self-trapped excitons in LN, shows very similar kinetics. Electrical conductivity measurements are performed in air as function of temperature. Up to about 600 °C they demonstrate similar temperature dependence for the two materials, from which rather comparable activation energies can be extracted. However, in the high-temperature range from about 600 °C to 920 °C both materials show noticeable differences. The results suggest that the fundamental microscopic understanding of LN can be in part transferred to LT. However, due to differences in structure, energetic landscape and temperature behavior, discrepancies between the two materials bear a striking potential for novel applications, even at high temperatures.
The Use of Google Classroom Application in a Blended Learning Environment

Educational challenges in the era of the industrial revolution 4.0 in the form of changes in the way of learning, thinking patterns and ways of acting students in developing creative innovations in the educational process. Today’s learning has used a variety of ways and technologies as the main supporting tools to increase student knowledge and competency. The Google Classroom application is a learning application that uses internet technology that is easily accessed through smartphone devices and develops the activeness and independence of student learning. The results of this study indicated that the use of the Google Classroom application: (1) made it easy for students to access learning resources, (2) fostered student interest in learning, (3) trained student learning discipline, (4) made students learn anytime and anywhere, (4) supports Blended learning when outside the classroom.
Influence of Hydraulic Connectivity on Carbon Burial Efficiency in Mackenzie Delta Lake Sediments

The Arctic is undergoing accelerated changes in response to ongoing modifications to the climate system, and there is a need for local to regional scale records of past climate variability in order to put these changes into context. The Mackenzie Delta region in northern Canada is populated by numerous small shallow lakes. They are classified as no‐, low‐, and high‐closure (NC, LC, and HC, respectively) lakes, reflecting varying degrees of connection to the river main stem, and have different sedimentation characteristics. This study examines sedimentological (mineral surface area, grain size), carbon isotopic (bulk and molecular‐level) and inorganic isotopic (neodymium) characteristics of sediment cores from three lakes representing each class. We find that HC lake sediments exhibit strikingly different properties from the other lake sediments. Specifically, they are characterized by higher organic carbon loadings per unit mineral surface area and with relatively minor influence from allochthonous, petrogenic (rock‐derived) organic carbon. In contrast, LC and NC lakes have the potential to record basin‐scale climatic changes at a high resolution by virtue of enhanced detrital sedimentation. Overall the delta lakes have the capacity to bury about 2 MtC year−1, with little changes in the last 200 years. However, in the (near) future, an increased number of high closure lakes might change the carbon burial efficiency of the Mackenzie Delta as they seem to retain less carbon than NC and LC lakes.
Trade openness, institutions and economic growth in Sub-Saharan Africa

This research investigates the interactive effect of trade openness and the institutional quality on economic growth in sub-Sahara Africa. The sample consists of 38 sub-Saharan African countries and covers the period 1986-2015. Pooled OLS, fixed effect, and Dynamic GMM were used as estimation techniques. The empirical section used a nonlinear growth regression specification that interacts trade openness with law and order, bureaucratic quality, corruption, government stability, and democratic accountability. The study found that corruption, government stability, law and order, and bureaucratic quality as institutional quality variables harm economic growth. The interaction of trade openness and institutional quality variables positively impacted economic growth. It is an indication that trade openness better impacted economic growth in the presence of high-quality institutional variables.
Relationship Between Piano Performance Self-efficacy Perceptions and Exam Anxieties of Music Teacher Candidates

Piyano performansinin duyussal boyutlari kapsaminda ele alinan oz yeterlik algisi ve sinav kaygisi, performansin niteligini etkilemektedir. Muzik ogretmeni adaylarinin, piyano performans basarilari bakimindan ozyeterlik algisi yuksek, kaygi duzeyini kontrol altinda tutabilen ogretmenler olarak yetismesi beklenmektedir. Bu calisma muzik ogretmeni adaylarinin piyano performansi oz yeterlik algilarinin ve sinav kaygilarinin duzeyini ve bu iki degisken arasindaki iliskiyi belirlemeyi amaclamistir. Arastirmada iliskisel tarama modeli kullanilmis, orneklemi toplam 718 muzik ogretmeni adayi olusturmustur. Veriler kisisel bilgi formu, piyano performansi oz yeterlik olcegi ve sinav kaygisi envanteri ile toplanmistir. Elde edilen veriler Pearson Korelasyon Katsayisi, tek yonlu varyans analizi (ANOVA) Welch testi, Scheffe testi ve Games Howell testi ile analiz edilmistir. Arastirma sonuclari, muzik ogretmeni adaylarinin piyano performansi oz yeterlik algilarinin ve sinav kaygilarinin orta duzeyde oldugunu gostermistir. Piyano performansi oz yeterlik algisi, piyano egitimine erken yasta baslayan, gunluk piyano calisma suresi 2 saatten fazla olan, piyano basari notu yuksek olan ve bireysel calgisi piyano olan muzik ogretmeni adaylari lehine anlamli bir fark gostermistir. Muzik ogretmeni adaylarinin piyano performansi oz yeterlik algisi ile sinav kaygilari arasinda negatif yonde anlamli ve orta duzeyde bir iliski oldugu tespit edilmistir. Arastirma sonuclari baglaminda, piyano performansi oz yeterlik algisini arttirmaya ve sinav kaygi duzeyini azaltmaya yonelik program gelistirme calismalari yapilabilir, ogretmen degerlendirme, akran degerlendirme calismalari ile yapici elestirilerin etkisi incelenebilir. Piyano performans surecine iliskin calisma aliskanliklari ve ozduzenleme ile ilgili programlarin duzenlenmesine ve bu programlarinin sinanmasina yonelik deneysel arastirmalar yapilabilir.
Sample Selection in Systematic Literature Reviews of Management Research

Systematic review techniques are about to become the “new normal” in reviews of management research. However, there is not yet much advice on how to organize the sample selection process as part of such reviews. This article addresses this void and analyzes this vital part of systematic reviews in more detail. In particular, it offers a critical review of systematic literature reviews published in the Academy of Management Annals and the International Journal of Management Reviews between 2004 and 2018. Based on this methodological literature review, the article presents issues to consider in the most critical choices during the sample selection process. Furthermore, this review identifies several descriptive features such as the mean number of research items included in systematic reviews, the mean number of databases used, and the mean coverage period of such reviews. These numbers may be used as benchmark figures in future reviews.
A review of enterprise social media: visualization of landscape and evolution

PurposeThe purpose of this review is to systematically understand the development of enterprise social media (ESM) research, quantitatively analyze the landscape and track the development of ESM literature and reveal new trends and challenges in ESM research.Design/methodology/approachBased on 321 relevant literature studies (2005–2020) collected from the Web of Science core collection, the visualization tool CiteSpace is used to conduct bibliometric cocitation and cooccurrence analyses to quantify and visualize the landscape and evolution of ESM research.FindingsThrough analyzing the author cocitation network, document cocitation network, journal cocitation network and keywords cooccurrence network, this review proposes an integrated research framework, which highlights major purposes, antecedents and consequences of ESM use in organizations and presents future research trends of ESM research.Originality/valueDifferent from the existing qualitative review of ESM, this review adopts bibliometric review to quantify and visualize the landscape of ESM research.
Social connectedness and job satisfaction in Mexican teleworkers during the pandemic: the mediating role of affective well-being

The purpose of this study was to examine the relationship between social connectedness outside of work and job satisfaction in Mexican teleworkers during the COVID-19 pandemic The research method was correlational, non-experimental, and cross-sectional Employing an online, self-administered survey, the data were collected in a non-probabilistic sample of 214 individuals The results suggest that the relationship between social connectedness outside of work and job satisfaction is positive and mediated by positive affective well-being The mediating effect of positive affective well-being is not moderated by optimistic attributional style Social connectedness outside of work is important to keep job satisfaction high Therefore, organizations should facilitate a frequent interaction of their teleworkers with others outside the work domain Alternate abstract:El propósito de este estudio fue examinar la relación entre la conectividad social fuera del trabajo y la satisfacción laboral en teletrabajadores mexicanos durante la pandemia por COVID-19 El método de investigación fue correlacional, no experimental y transversal Los datos se recolectaron en una muestra no probabilística de 214 individuos mediante una encuesta autoadministrada en línea Los resultados sugieren que la relación entre la conectividad social fuera del trabajo y la satisfacción laboral es positiva y está mediada por el bienestar afectivo positivo El efecto mediator del bienestar afectivo positivo no está moderado por el estilo atribucional optimista Dada la importancia de la satisfacción laboral, las organizaciones deberían facilitar la interacción frecuente de sus empleados con personas fuera del trabajo Alternate abstract:O objetivo deste estudo foi examinar a relação entre conectividade social fora do trabalho e a satisfação no trabalho em teletrabalhadores mexicanos durante a pandemia COVID-19 O método de pesquisa foi correlacional, não experimental e transversal Os dados foram coletados em uma amostra não probabilística de 214 indivíduos por meio de um questionário online autoaplicável Os resultados sugerem que a relação entre conectividade social fora do trabalho e satisfação no trabalho é positiva e mediada por bem-estar afetivo positivo O efeito mediador do bem-estar afetivo positivo não é moderado pelo estilo de atribuição otimista Dada a importância da satisfação no trabalho, as organizações devem facilitar a interação frequente de seus funcionários com pessoas fora do trabalho
A Theoretical Explanation of Sport Trademark Litigation: Already v. Nike and Forever 21 v. Adidas

Abstract Trademark law provides owners of legally protected marks with a set of legal claims against unauthorized users. Law and economics and brand equity theories rationalize the system of trademarks. Meanwhile, game theory explains why trademark rights must be legally protected and how parties in sport trademark litigation make decisions in anticipation of the opponents’ expected course of action. Four game settings rationalize the utility of trademarks and showcase parties’ strategic moves in trademark litigation: (1) prisoners’ dilemma, (2) game of chicken, (3) sequential game, and (4) game of brinkmanship. Focusing on the Already v. Nike and Forever 21 v. Adidas trademark litigation cases, this study explores the interactive dynamics between parties and the factors associated with the parties’ decision-making during the process of litigation.
Gulf Stream Mean and Eddy Kinetic Energy: Three‐Dimensional Estimates From Underwater Glider Observations

The strong, meandering, and eddy‐shedding Gulf Stream is a large oceanic reservoir of both mean and eddy kinetic energy in the northwestern Atlantic. Since 2015, underwater gliders equipped with Doppler current profilers have collected over 20,000 absolute velocity profiles in and near the Gulf Stream along the US East Coast. Those observations are used to make three‐dimensional estimates of mean and eddy kinetic energy, substantially expanding the geographic coverage of prior estimates of subsurface kinetic energy in the Gulf Stream. Glider observations are combined via weighted least squares fitting with anisotropic and inhomogeneous length scales to reflect both circulation and sampling density; this averaging technique can be applied to other quantities measured by the gliders. Mean and eddy kinetic energy decay approximately exponentially away from the surface. Vertical decay scales are longest within the high‐speed core of the Gulf Stream and somewhat shorter on the flanks of the Gulf Stream.
Social Innovation and the Role of the State: Learning from the Portuguese Experience on Multi-Level Interactions

The state is facing turbulent times. Financial and economic turmoil, growing inequalities, disinvestment in public and social services, and political disenchantment are but a few problems that contemporary society is facing, while traditional policies are failing to deliver the desired results. Social innovation is a possible approach to deal with emergent social needs. Research and policy experimentation on social innovation increased in the last decade, but many questions remain open. One key interrogation regards the relation of social innovation with the state. How can the state, considering the multi-level interactions that necessarily exist between different stakeholders, promote these practices? Using the case of Portugal, and the recent implementation of a pioneer public programmed dedicated to social innovation—Portugal Social Innovation—, this article contributes to the understanding of the role the state in the promotion of social innovation and the challenges, tensions, and difficulties experienced by those involved in the sector, whether as practitioners of social innovation or as heads of public institutions responsible for assisting in the development and implementation of social innovations. The article presents data gathered from a focus group involving the representatives from key third sector associations and officials responsible for public institutions that support the implementation of social innovation at the relevant levels of government (national, regional, local). Results show opportunities and tensions between the third sector and the different levels of the state, and a difficulty to adapt the processes and practices of public administration to the dynamic and creative nature of social innovation.
Left heart growth and biventricular repair after hybrid palliation.

OBJECTIVES METHODS We evaluated the outcomes of biventricular repair after initial hybrid palliation performed in small infants with various forms of left ventricle hypoplasia. RESULTS Between September 2010 and January 2020, a total of 27 patients had biventricular repair after hybrid palliation at a median age of 11 days. Indications for the hybrid approach included growth promotion of the left ventricle outflow tract and/or the aortic valve in 14 patients and that of the left ventricle in 13 patients. Seven reinterventions and 7 reoperations were performed during the interstage period. Significant growth of left ventricle parameters was noted during the median interstage period of 62 days. Sixteen subjects had aortic arch repair, ventricular septal defect closure and relief of subaortic stenosis; 5 patients had the Ross-Konno procedure; 5 patients underwent the Yasui procedure; and 1 patient had unbalanced atrioventricular septal defect and aortic arch repair. CONCLUSIONS Twenty-three patients (85.2%) are alive at a median follow-up of 3.3 years. Two and 3 patients died early and late after achieving biventricular circulation, respectively. There were 22 reinterventions and 15 reoperations after biventricular repair.
Recent Advances in Acoustics of Transitional Airfoils with Feedback-Loop Interactions: A Review

We discuss herein recent experimental and numerical studies examining resonant flow-acoustic feedback–loop interactions in transitional airfoils (i.e., possessing a notable area of laminar-to-turbulent boundary-layer transition) characteristic of low-to-medium Reynolds number flow regimes. Such interactions are commonly attributed to the viscous dynamics of the convected boundary-layer structures scattering into acoustic waves at the trailing edge which propagate upstream and re-excite the convected vortical structures. While it has been long suspected that the acoustic feedback mechanism is responsible for the highly pronounced, often multi-tonal response, the exact reason of how the boundary-layer instability structures could reach a sufficient degree of amplification to sustain the feedback-loop process and exhibit specific tonal signature remained unclear. This review thus pays particular attention to the critical role of the separation bubble in the feedback process and emphasizes the complementary roles of the experimental and numerical works in elucidating an intricate connection between the airfoil radiated tonal acoustic signature and the properties of the separation zones as determined by airfoil geometry and flow regimes.
Bimodal Microstructure Obtained by Rapid Solidification to Improve the Mechanical and Corrosion Properties of Aluminum Alloys at Elevated Temperature

The demand for aluminum alloys is increasing, as are the demands for higher strength, with the aim of using lighter products for a greener environment. To achieve high-strength, corrosion-resistant aluminum alloys, the melt is rapidly solidified using the melt-spinning technique to form ribbons, which are then plastically consolidated by extrusion at elevated temperature. Different chemical compositions, based on adding the transition-metal elements Mn and Fe, were employed to remain within the limits of the standard chemical composition of the AA5083 alloy. The samples were systematically studied using light microscopy, scanning electron, and transmission microscopy with electron diffraction spectrometry for the micro-chemical analyses. Tensile tests and Vickers microhardness were applied for mechanical analyses, and corrosion tests were performed in a comparison with the standard alloy. The tensile strength was improved by 65%, the yield strength by 45% and elongation by 14%. The mechanism by which we achieved the better mechanical and corrosion properties is explained.
Validation of Kiswahili Version of HOQOLHIVBREF Questionnaire Among People Living with HIV/AIDS in Tanzania: A Cross-Sectional Study

: Background: Quality of life is an important element of surveillance in people living with HIV/AIDS. WHO has developed an HIV specific quality of life tool (WHOQOLHIV-Bref) for assessing Quality of life of HIV individuals. This tool takes into account the different cultural variations that exist worldwide and hence enable assessment of the quality of life across different cultures. Despite its preliminary sound validity and reliability from several studies, the developers recommend it to be validated in different cultures to fully assess its psychometric properties before its adaptation. To evaluate the validity and reliability of WHOQOLHIV-Bref questionnaire in Tanzanian culture among people living with HIV/AIDS. reliability Validity assessed through analysis of translational, concurrent, convergent and discriminant validity while the model performance assessed by Exploratory and confirmatory factor analysis.
Isotopic Signatures of Major Methane Sources in the Coal Seam Gas
Fields and Adjacent Agricultural Districts, Queensland, Australia

Abstract. In regions where there are multiple sources of methane (CH4) in close proximity, it can be difficult to apportion the CH4 measured in the atmosphere to the appropriate sources. In the Surat Basin, Queensland, Australia, coal seam gas (CSG) developments are surrounded by cattle feedlots, grazing cattle, piggeries, coal mines, urban centres and natural sources of CH4. The use of carbon (δ13C) and hydrogen (δD) stable isotopic composition of CH4 can identify, distinguish between and apportion specific emissions of CH4. However, in Australia there is a paucity of data on the various isotopic signatures of the different source types. This research examines whether dual isotopic signatures of CH4 can be used to discriminate between sources of CH4 in the Surat Basin. We also highlight the benefits of sampling at nighttime in warm to hot climate regions. During two campaigns in 2018 and 2019, a mobile CH4 monitoring system was used to detect CH4 plumes. Seventeen plumes immediately downwind from known CH4 sources were sampled and analysed for their CH4 mole fraction and δ13CCH4 and δDCH4 signatures. The isotopic signatures of the CH4 sources were determined using Miller–Tans plots. These new source signatures were then compared to values documented in reports and peer-reviewed journal articles. In the Surat Basin, CSG sources have δ13CCH4 signatures between −56.0 ‰ and −51.0 ‰ and δDCH4 signatures between −207.0 ‰ and −193.0 ‰. Emissions from an open-cut coal mine have δ13CCH4 and δDCH4 signatures of −60.3 ± 0.2 ‰ and −210.5 ± 0.5 ‰ respectively. Emissions from two ground seeps (abandoned coal exploration wells) have δ13CCH4 signatures of −60.7 ± 0.2 ‰ and −59.9 ± 0.9 ‰ and δDCH4 signatures of −191.2 ± 0.5 ‰ and −185.1 ± 0.9 ‰. A river seep had a δ13CCH4 signature of −61.1 ± 0.9 ‰ and a δDCH4 signature of −225.5± 1.4 ‰. Three dominant agricultural sources were analysed. The δ13CCH4 and δDCH4 signatures of a cattle feedlot are −63.0 ± 1.2 ‰ and −309.0 ± 1.0 ‰ respectively, grazing (pasture) cattle have δ13CCH4 and δDCH4 signatures of −59.9 ± 0.8 ‰ and −291.6 ± 2.4 ‰ respectively, and a piggery sampled had δ13CCH4 and δDCH4 signatures of −47.5 ± 0.2 ‰ and −300.3 ± 1.8 ‰ respectively, which reflects emissions from animal waste. An abattoir had δ13CCH4 and δDCH4 signatures of −44.3 ± 0.3 ‰ and −315.0 ± 1.3 ‰ respectively. A plume from a waste-water treatment plant had δ13CCH4 and δDCH4 signatures of −47.6 ± 0.2 ‰ and −177.5 ± 1.4 ‰ respectively. In the Surat Basin, source attribution is possible when both δ13CCH4 and δDCH4 are measured for the key categories of CSG, cattle, waste from feedlots and piggeries, and water treatment plants. Under most field situations using δ13CCH4 alone will not enable clear source attribution. It is common in the Surat Basin for CSG and feedlot facilities to be co-located. Measurement of both δ13CCH4 and δDCH4 will assist in source apportionment where the plumes from two such sources are mixed.