bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Trend of Reduced Chinese Investments in the Belt and Road Initiative: Spending Contentions and Preparations for an Upcoming Financial Crisis
Authors: Spellmann Samuel , Cunha Leite Alexandre César 
Published: February 2020

Este artículo busca establecer explicaciones para el cambio en el patrón de inversiones presentado en el flujo de inversión directa no financiera (IED) de China en la Nueva Ruta de la Seda (NRS). En primer lugar, la reducción de las inversiones en nrs se verifica a través del análisis del Statistical Bulletin of China’s Outward Foreign Direct Investment entre los años 2013 y 2016. Después, al tratar de explicar la reducción del flujo de ied no financiera de China a nrs, este artículo analiza dos hipótesis. Primero, retrata las medidas actuales de control del gasto público de China, que abordan el crecimiento del exceso de capacidad del país, mientras discute las similitudes entre la economía china y la crisis japonesa de principios de la década de 1990. Posteriormente, contempla la posibilidad de que los preparativos realizados por las autoridades chinas se contrarresten por la inestabilidad anticipada de los mercados mundiales. La confluencia de estos factores ayuda a explicar la reducción del flujo no financiero de ied a nrs, que contrasta con la tendencia contemporánea hacia la inversión china en el mundo durante el mismo período.
Application of holographic interferometry in the analysis of stress states in a crack root area
Authors: Frankovský Peter , Brodnianská Zuzana , Bocko Jozef , Trebuňová Marianna , Kostka Ján , Kicko Michal , Čarák Peter 
Published: February 2020

This paper deals with the visualization and analysis of interaction of
a cutting wedge disintegrator with plastic at low loads. For
exploratory research, a contactless optical holographic interferometry
method was used, allowing a comprehensive picture of the stress state
when opening microcracks. An experimental model was set up for the
purposes of the research. The structure of the model as well as its
geometric parameters had to comply with the applied optical method.
The method of holographic interferometry enabled us to record even the
initial stages of the crack. Pictures of holographic interferograms
allowed us to observe stress fields on the cutting wedge as well as on
the loaded body in the form of interference fringes. In order to
record the interferograms, we used the method of two exposures so that
we gained double-exposure interferograms, which represent the state of
the object during the second exposure. The first exposure was caused
by superposition of object-related and reference wave after the object
was subjected to a load; the second exposure occurred after the load
was removed. We used quantitative analysis to determine stress
intensity coefficients from holographic interferograms as followed by
the calculation of stresses with respect to axes

x

and

y

. The analysis was done for loading
forces 1.57 N and 3.14 N. As the load applied to the cutting material
was increasing, the density of interference fringes was increasing,
too.
Parameterized optical properties of InxAl1-xP alloys
Authors: Nguyen Hoang Tung , Kim Tae Jung , Park Han Gyeol , Le Van Long , Nguyen Xuan Au , Kim Young Dong 
Published: February 2020

We report values of parametric-model (PM) parameters that can be used to obtain dielectric functions (refractive indices) from 1.5 to 6.0 eV for

I
n

x

A
l

1
−
x

P

alloys of arbitrary compositions

x

. Using reported pseudo-dielectric data for several In compositions, we extract their dielectric functions by multilayer calculations, then parameterize them with PM lineshapes that well describe the asymmetric nature of their critical point (CP) contributions. We follow the

E
0

fundamental bandgap as a function of

x

, and determine the composition of the indirect-to-direct crossover.
Individually resolved luminescence from closely stacked GaN/AlN quantum wells
Authors: Sheng Bowen , Schmidt Gordon , Bertram Frank , Veit Peter , Wang Yixin , Wang Tao , Rong Xin , Chen Zhaoying , Wang Ping , Bläsing Jürgen , Miyake Hideto , Li Hongwei , Guo Shiping , Qin Zhixin , Strittmatter André , Shen Bo , Christen Jürgen , Wang Xinqiang 
Published: February 2020

Investigating closely stacked GaN/AlN multiple quantum wells (MQWs) by means of cathodoluminescence spectroscopy directly performed in a scanning transmission electron microscope, we have reached an ultimate spatial resolution of

σ

CL

=
1.8

nm

. The pseudomorphically grown MQWs with high interface quality emit in the deep ultraviolet spectral range. Demonstrating the capability of resolving the 10.8 nm separated, ultra-thin quantum wells, a cathodoluminescence profile was taken across individual ones. Applying a diffusion model of excitons generated by a Gaussian-broadened electron probe, the spatial resolution of cathodoluminescence down to the free exciton Bohr radius scale has been determined.
Out of bounds: The spatial politics of civility in The Square (Östlund, 2017) and Happy End (Haneke, 2017)
Authors: Ezra Elizabeth 
Published: February 2020

Abstract
Ruben Östlund's The Square and Michael Haneke's Happy End, both released in 2017, skirt around the edges of immigration in Europe. Both address the question of who belongs and who does not in terms of boundaries – not only the boundaries that determine where one country ends and another begins but also (and especially) those that determine who is a member of civil society. These films explore how the bounds of what is considered appropriate are breached in specific spatial contexts, questioning the meaning of 'civility' in both a social and a political sense, and prompting us to contemplate the various meanings of hospitality.
Hunting multiple bumps in graphs
Authors: Sun Yahui , Luo Jun , Lappas Theodoros , Xiao Xiaokui , Cui Bin 
Published: February 2020

Bump hunting is an important approach to the extraction of insights from Euclidean datasets. Recently, it has been explored for graph datasets for the first time, and a single bump is hunted in an unweighted graph in this exploration. Here, we extend this exploration by hunting multiple bumps in a weighted graph. Given a weighted graph and a set of
query
nodes exhibiting a property of interest, our objective is to find
k
non-overlapping and connected subgraphs, i.e., bumps, in which the discrepancy between the numbers of query and non-query nodes is maximized and the sum of edge costs is minimized simultaneously.

We prove that our extended bump hunting problem can be transformed to a recently formulated Prize-Collecting Steiner Forest Problem (PCSFP). We further prove that PCSFP is NP-hard even in trees. Then, we propose a fast approximation algorithm for solving PCSFP in trees. Based on this algorithm, we improve the state-of-the-art approximation algorithm for solving PCSFP in graphs, and prove that the solutions of our improvement are always better than or equal to those of the state-of-the-art algorithm. Moreover, we adapt the existing bump hunting algorithms for solving our extended bump hunting problem.
We evaluate our methodology via real datasets, and show that 1) our improvement scales well to large graphs, while producing solutions that dominate those of the state-of-the-art algorithm; and 2) our adaptation of an existing bump hunting algorithm can also produce solutions that are better than those of the state-of-the-art algorithm in some cases.
Dynamic speculative optimizations for SQL compilation in Apache Spark
Authors: Schiavio Filippo , Bonetta Daniele , Binder Walter 
Published: February 2020

Big-data systems have gained significant momentum, and Apache Spark is becoming a de-facto standard for modern data analytics. Spark relies on SQL query compilation to optimize the execution performance of analytical workloads on a variety of data sources. Despite its scalable architecture, Spark's SQL code generation suffers from significant runtime overheads related to data access and de-serialization. Such performance penalty can be significant, especially when applications operate on human-readable data formats such as CSV or JSON.
In this paper we present a new approach to query compilation that overcomes these limitations by relying on run-time profiling and dynamic code generation. Our new SQL compiler for Spark produces highly-efficient machine code, leading to speedups of up to 4.4x on the TPC-H benchmark with textual-form data formats such as CSV or JSON.
From TOM to the TIM23 complex – handing over of a precursor
Authors: Callegari Sylvie , Cruz-Zaragoza Luis Daniel , Rehling Peter 
Published: February 2020

Abstract
Mitochondrial precursor proteins with amino-terminal presequences are imported via the presequence pathway, utilizing the TIM23 complex for inner membrane translocation. Initially, the precursors pass the outer membrane through the TOM complex and are handed over to the TIM23 complex where they are sorted into the inner membrane or translocated into the matrix. This handover process depends on the receptor proteins at the inner membrane, Tim50 and Tim23, which are critical for efficient import. In this review, we summarize key findings that shaped the current concepts of protein translocation along the presequence import pathway, with a particular focus on the precursor handover process from TOM to the TIM23 complex. In addition, we discuss functions of the human TIM23 pathway and the recently uncovered pathogenic mutations in TIM50.
Polyphenol content and bioactivity of Achillea moschata from the Italian and Swiss Alps
Authors: Argentieri Maria Pia , Madeo Moira , Avato Pinarosa , Iriti Marcello , Vitalini Sara 
Published: February 2020

Abstract

Achillea moschata Wulfen, which grows in the Alps, is extensively used by local people for its medicinal properties. Two studied samples were collected, at the flowering stage, in Val Mustair (Switzerland) and Valchiavenna (Italy), respectively. The aerial parts were defatted with petroleum ether (PET) and successively extracted with dichloromethane (DCM) and methanol (MeOH). High-performance liquid chromatography and electrospray ionization-tandem mass spectrometry analyses of the methanolic extracts evidenced that flavonoids were the predominant compounds compared to phenolic acids in both samples (89.5 vs. 33.0 μg/mg DW in A. moschata Valchiavenna and 82.5 vs. 40.0 μg/mg DW in A. moschata Val Mustair). Among flavonoid derivatives, luteolin and apigenin were the predominant aglycones, free and glycosilated. The A. moschata Valchiavenna extract was characterized by apigenin as the main compound (60.4 μg/mg DW), while A. moschata Val Mustair was characterized by its derivative apigenin 7-O-glucoside (44.7 μg/mg DW). The antioxidant activity of all the obtained extracts was tested by the DPPH (2,2-diphenyl-picryl hydrazyl) and ABTS (2,21-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) methods, which showed their increasing scavenger capacity in relation to extract polarity (PET extract < DCM extract < MeOH extract). The extracts were also investigated against three Gram-positive (Bacillus cereus, Enterococcus faecalis and Staphylococcus aureus) and three Gram-negative (Escherichia coli, Proteus mirabilis and Pseudomonas aeruginosa) bacterial species using the disc diffusion assay. DMC and PET were the most active extracts (inhibition diameter: ≥12 mm).
let-7-Complex MicroRNAs Regulate Broad-Z3, Which Together with Chinmo Maintains Adult Lineage Neurons in an Immature State
Authors: Wu Yen-Chi , Chawla Geetanjali , Sokol Nicholas 
Published: February 2020

Abstract
During Drosophila melanogaster metamorphosis, arrested immature neurons born during larval development differentiate into their functional adult form. This differentiation coincides with the downregulation of two zinc-finger transcription factors, Chronologically Inappropriate Morphogenesis (Chinmo) and the Z3 isoform of Broad (Br-Z3). Here, we show that br-Z3 is regulated by two microRNAs, let-7 and miR-125, that are activated at the larval-to-pupal transition and are known to also regulate chinmo. The br-Z3 3′UTR contains functional binding sites for both let-7 and miR-125 that confers sensitivity to both of these microRNAs, as determined by deletion analysis in reporter assays. Forced expression of let-7 and miR-125 miRNAs leads to early silencing of Br-Z3 and Chinmo and is associated with inappropriate neuronal sprouting and outgrowth. Similar phenotypes were observed by the combined but not separate depletion of br-Z3 and chinmo. Because persistent Br-Z3 was not detected in let-7-C mutants, this work suggests a model in which let-7 and miR-125 activation at the onset of metamorphosis may act as a failsafe mechanism that ensures the coordinated silencing of both br-Z3 and chinmo needed for the timely outgrowth of neurons arrested during larval development. The let-7 and miR-125 binding site sequences are conserved across Drosophila species and possibly other insects as well, suggesting that this functional relationship is evolutionarily conserved.
O uso da tecnologia como facilitadora para resolução de atividades extraclasse
Authors: Maciel Wilma Lima , Lima Conceição Maria Dias de 
Published: February 2020

RESUMO: Em relação ao uso das tecnologias da informação e comunicação (TIC’s) no espaço educacional, há uma longa história cultural e educativa que precisa ser pesquisada com mais atenção, interpretada, respeitada e valorizada pelos programas de formação de educadores, pelos cursos de graduação e pós-graduação, pelas agências de pesquisa, pelos formadores de política, currículos e material didático. O estudo aponta a importância de um olhar sobre o presente fenômeno educativo, considerando que a educação deve contemplar os anseios da humanidade pelo acesso à escola e por vida digna e justiça social. O procedimento metodológico compreende um estudo de caso, realizado na Escola Municipal Professora Virgília Bezerra de Lima, no município de Delmiro Gouveia – AL. A pesquisa baseou-se em um trabalho de coleta de dados, através de um questionário direcionado aos estudantes. Na busca de amarrar essas questões mais profundamente, alguns autores foram prioritários, como: LOBO NETO, (2006); entre outros. A pesquisa objetiva conhecer como está sendo desenvolvido o uso da tecnologia como instrumento para resolução de atividades extraclasse nessa escola, procurando compreender qual o papel das TIC’s na educação fundamental e analisando quais às perspectivas para a aprendizagem mediada pelas tecnologias digitais da informação e comunicação. Como sugestões de novos estudos verifica-se a necessidade de um melhor aprofundamento sobre o uso das tecnologias de informação e comunicação no espaço escolar, o processo avaliativo e a metodologia em atividades extraclasse.
PALAVRAS-CHAVE: Espaço educacional, Tecnologia da Informação e da Comunicação, estudo.
Território da comunidade travesti no centro de Teresina-PI
Authors: Araújo Thiago Emanoel Vasconcelos de , Vieira Mariana Costa 
Published: February 2020

RESUMO: O debate sobre o território foi retomado com a grande importância que de fato merece e se caracteriza como objetivo de estudo da Geografia. Para a ciência geográfica o tema território vem se destacando não pelo seu significado, mas pela sua relevância com o meio de convivência para os seres humanos, além de ser relevante à identificação dos territórios das diferentes comunidades. O território não está ligado somente ao poder politico, está ligado também a poder simbólico de apropriação. A prostituição é um ato social da minoria excluída perante a sociedade, sem oportunidade. As travestis ao entardecer são vistas nas ruas do centro de Teresina para mais uma noite de trabalho, e é fácil identificar os espaços construídos pelas mesmas ao longo dos anos. Qual a importância e quais os reais motivos levaram essas profissionais a escolherem esses territórios?
PALAVRAS-CHAVE: Território, Prostituição, Travestis.
Cortes de carne, um estudo de caso preliminar em Alagoas (Brasil), com nova abordagem
Authors: Lages André Maia Gomes , Santos Jonathan de França , Jesus Evelly Vitória Oliveira de , Silva Fabiano Lucas da , Dias Kennyo Douglas Pedrosa , Camilo Vitória Leandra Santos 
Published: February 2020

RESUMO: Esse trabalho tem o objetivo de averiguar os cortes do boi e seus respectivos preços, fazendo uma divisão entre cortes do lado dianteiro e cortes do lado traseiro do animal. Existem diferenças significativas entre essas partes e no conjunto separado delas. O consumidor vive distante dessa realidade e não tem noção dessa diferença. O caráter do trabalho é, portanto, descritivo e informativo. O ensaio utiliza dados primários com estatística descritiva e uma amostra por conveniência, assim não probabilística. Os resultados garantem um preço maior para os cortes de primeira e uma variância maior. Resultados explicados ao longo do texto, acima como menção aos cortes traseiros e dianteiros.
PALAVRAS-CHAVE: Bovino, Economia Agropecuária, Preços.
Acoso sexual en la comunidad estudiantil de la Universidad de Manizales (Colombia) 2008. Estudio de corte transversal
Authors: Castaño-Castrillón José Jaime , González Eliana Katherine , Guzmán July Andrea , Montoya Jhon Stiven , Murillo Juan Manuel , Páez-Cala Martha Luz , Parra Luisa María , Salazar Tania Victoria , Velásquez Yesica 
Published: February 2020

Introducción: el objetivo de la presente investigación es analizar el acoso sexual, su frecuencia e imaginarios en la comunidad estudiantil de la Universidad de Manizales, Caldas (Colombia). Esta es una temática con escasas investigaciones en el ámbito universitario y con importantes implicaciones para la víctima.Metodología: este estudio de corte transversal se efectúo con 205 estudiantes de la Universidad de Manizales, muestra representativa de una población de 3.584 personas. Entre otras variables, se indagó sobre el acoso sexual antes y después de ingresar a la universidad, quién efectuó el acoso, la opinión de los estudiantes sobre qué se considera un acoso sexual, quién lo propicia y cómo debe ser castigado; así como la orientación sexual, la facultad y el semestre al que pertenecía el estudiante.Resultados: se observó una frecuencia de acoso sexual de 6,8% durante la permanencia en la universidad, la cual se presentó únicamente en los 4 primeros semestres y fue efectuada por docentes (50%) y compañeros de clase (21,4%, hombres y mujeres en la misma proporción). De manera adicional, sólo 7,1% de los casos fue denunciado y de éstos únicamente 66,7% recibió ayuda. En contraste, 47,1% de los acosados ha sido víctima de chantaje e intimidación para evitar que denuncie. Sin embargo, 23,5% de las víctimas consideran que en parte propiciaron el acoso.Conclusiones: el acoso sexual es una agresión a los derechos fundamentales y está ahora presente en la Universidad de Manizales. No osbstante, aunque no tiene una frecuencia tan alta comparado con otros estudios, sí constituye un problema en el cual se debe intervenir.
Extensive Atraumatic Heterotopic Ossification of the Achilles Tendon in an Adolescent with Metabolic Syndrome
Authors: Su Lisa , Arshi Armin , Beck Jennifer J. 
Published: February 2020

Case:
A 15-year-old boy with type 1 diabetes mellitus, hypertension, and obesity presented with atraumatic posterior ankle pain and stiffness due to extensive heterotopic ossification (HO) of the Achilles tendon. The ossification was successfully surgically resected and tendon primarily repaired. Wound dehiscence was noted at the first preoperative visit, managed conservatively by local wound care, and healed uneventfully by secondary intention. One-year follow-up showed no recurrence of HO, return to baseline activities, yet low Oxford scores.

Conclusion:
HO of the Achilles tendon is a rare clinical entity. We report an atraumatic case in an adolescent patient with metabolic syndrome, which may demonstrate systemic inflammation because of metabolic syndrome as a risk factor for HO.
Fatigue Modeling in BHA Connections: Is BSR Helpful?
Authors: Pettit Grant , Lee Kang 
Published: February 2020

Abstract
Bending Strength Ratio (BSR) is a time-honored technique for choosing BHA connections, and is often the basis for the popularity of some connections over others. However, experience and some isolated research indicates that it might not be accurate in predicting the best connection. This paper attempts to use Finite Element Analysis (FEA) coupled with fatigue-life modeling to develop a systematic picture of the effectiveness of BSR as a design criteria.
The modeling process used has been developed previously (Ellis et al 2008, for example). Each connection and collar size studied is modeled in detail using Finite Element Analysis (FEA) techniques, and the resulting stresses and strains can be used to calculate the number of cycles to failure for a given set of parameters. These results are not accurate for predicting actual component failure, but they are helpful for comparison between options to choose the best designs. This work represents a fairly-complete cross section of the BHA connections in regular use, studied for their relative performance.
A challenge of directly modeling fatigue lives is finding a way to compare the results for global patterns. Since different collar sizes will have different applied stress levels at different curvatures, a method for normalizing the results is developed here. This allows an easy global comparison between the different connections.
The outcome of this in-depth study of connection fatigue-modeling results is a surprise: BSR is not helpful for design, and there seems to be no clear pattern for ID and OD sizing. Instead, the drill string designer should choose the right connections at the time of manufacturing, and use a normalized comparison method to determine the relative risk in each operation.