bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phosphorus Dynamics Near Bald Cypress Roots in a Restored Wetland
Authors: Moorberg Colby J. , Vepraskas Michael J. , Niewhoener Christopher P. 
Published: December 2017

Core Ideas
Previous tree exposure to saturated conditions limited root death after ponding.
Root growth and death had no apparent effect on concentrations of Fe2+, DOC, or DTP.
Concentrations of Fe2+ were related to water table levels and redox status.
Phosphorus concentrations were controlled by iron reduction and oxidation.
Phosphorus (P) dissolution occurs commonly in wetland soils restored from agricultural land. Associated with P release are high concentrations of dissolved organic carbon (DOC) and Fe2+. This field study evaluated the effect of a fluctuating water table on the root dynamics of bald cypress (Taxodium distichum L. Rich.) to determine whether root death created soil reduction microsites, potentially contributing to P dissolution. The study site is a restored Carolina bay wetland with organic soils. Root growth and death were monitored on 16 6‐yr‐old bald cypress using minirhizotrons. Root dynamics, water table levels, and soil porewater chemistry and redox potential in the root zone were monitored for 2 yr. Soil solution samples were analyzed for Fe2+, pH, DOC, and P. High rates of root growth occurred during dry conditions, whereas root death occurred during sustained periods of saturation, particularly within 20 cm of the surface. Cyclic changes in concentrations of Fe2+, DOC, and dissolved total P (DTP) were related to water table position but not to changes in root numbers. After sustained periods of saturated conditions, redox potential decreased to 0 mV, Fe2+ increased to 1.75 mg Fe2+ L–1, and DOC increased to 350 mg L–1, resulting in peak DTP concentrations of 750 μg L–1, compared with 100 μg L–1 during dry periods. This study showed that in these high‐C soils (∼20% organic C) rooting dynamics had minimal impact on changes in P concentrations and that P dissolution was largely controlled by Fe reduction processes occurring within the C‐rich soil matrix.
"... cada macaco no seu galho". A participação democrática na escola pública
Authors: Patacho Pedro , Santomé Jurjo Torres 
Published: December 2017

A participação das famílias e da comunidade foi um dos dois argumentos em que se apoiou o regime de autonomia, administração e gestão das escolas aprovado em Portugal em 2008. Contudo, não existe evidência de que esta participação esteja a contribuir para introduzir melhorias significativas nas escolas. O presente artigo emerge de um estudo de casos mais amplo que analisou a participação das famílias em dois agrupamentos de escolas dos subúrbios de Lisboa, ambos com boa reputação na comunidade, mas bastante diferentes relativamente às variáveis de contexto. Foram aplicados 438 questionários a pais e mães, 122 questionários a docentes da Educação Básica, e foram realizadas 20 entrevistas semiestruturadas com diversos participantes. Os resultados evidenciam sobretudo uma visão conservadora da educação escolar e uma contradição entre a retórica e a prática da participação democrática, parecendo esta constituir o mero cumprimento de um formalismo legal. Palavras-chave: Participação das famílias e da comunidade; Escola democrática; Justiça social; Autonomia escolar ABSTRACTThe participation of the families and the community was one of the two arguments underlying the Portuguese school governance model approved in 2008. However, there is no evidence that this participation has contributed to significant improvements in schools. This article emerges from a larger case study that analyzed the participation of families in two school clusters in the suburbs of Lisbon, both with a good reputation in the community, but quite different regarding the context variables. 438 questionnaires were applied to families, 122 to teachers, and 20 semi-structured interviews were conducted with several participants. Results show, above all, a conservative vision of education and a marked contradiction between the rhetoric and the practice of democratic participation, which seems to constitute the mere fulfillment of a legal formalism.Keywords: Family and community participation; Democratic school; Social justice; School autonomy
Conhecimentos sobre sexualidade: Construção e validação de um instrumento de avaliação para adolescentes em contexto escolar
Authors: Carvalho Cristiana Pereira de , Pinheiro Maria do Rosário De Carvalho Nunes Manteigas e Moura , Pinto Gouveia José Augusto , Vilar Duarte Rei 
Published: December 2017

O conhecimento, enquanto fator capaz de exercer influência sobre as atitudes, é um pré-requisito fundamental nos programas de prevenção dos comportamentos sexuais de risco. Este estudo teve como objetivo desenvolver um instrumento para avaliar os conhecimentos dos adolescentes sobre a sexualidade. O Questionário de Conhecimentos sobre Sexualidade pretende avaliar os conhecimentos num continuum de dificuldade e distinguir os alunos com diferentes níveis de saberes. A amostra foi constituída por 1545 adolescentes com uma média de 16 anos (DP=1.80) que frequentam a escola. Os resultados evidenciam que as raparigas estão mais informadas do que os rapazes, e que os jovens portugueses com mais de 15 anos, sem religião, com mais de 5 anos de educação sexual na escola e que tiveram a mãe como educadora sexual são os que têm mais conhecimentos sobre a sexualidade. As atitudes dos adolescentes em relação ao preservativo mostraram estar associadas aos conhecimentos e os adolescentes que usaram preservativo no último encontro sexual revelaram níveis mais elevados de conhecimentos. Palavras-chave: Conhecimentos; Educação Sexual; Adolescentes; Questionário ABSTRACTKnowledge, as a factor that exerts influence on attitudes, is a fundamental prerequisite in prevention programs of risky sexual behaviours. The aim of this study was to develop an instrument that would assess the knowledge that adolescents have about sexuality. The Knowledge about Sexuality Questionnaire assesses the knowledge in a difficulty continuum and also the distinction of students with different levels of knowledge. The sample was composed by 1545 adolescents with a mean age of 16 years (SD=1.80) that attend school. The results show that girls are more informed than boys, and that Portuguese adolescents older than 15, without religion, with more than 5 years of sexual education in school and having their mothers as sexual educators are the ones with more knowledge about sexuality. The attitudes of the adolescents towards the use of condom are associated with the knowledge they have about it and the adolescents that used condom in their last sexual relation reveal higher levels of knowledge. Keywords: Knowledge; Sexual Education; Adolescents; Questionnaire
SOFTWARE BASED EXPERIMENTAL SYSTEM FOR ELECTRICAL POWER QUALITY MEASUREMENT USING THE WIRELESS SENSOR NETWORK MODULES
Authors: Simić Milan , Planinšič Peter , Denić Dragan , Gleich Dušan , Živanović Dragan , Malajner Marko 
Published: December 2017

Experimental system for measurement of standard electrical power quality (PQ) parameters, based on wireless sensor network (WSN), is presented in this paper. System includes generator of reference voltage waveforms, software application for measurement of standard PQ parameters and two microcontroller based wireless sensor modules for transmitting and receiving of measurement results. Reference voltage signals are provided using signal generator with possibility for simulation of typical network disturbances, presented in some previously published papers. This PQ signal generator is functionally supported by the virtual instrumentation software and data acquisition card. Measurements of basic quality parameters for reference test signals are performed using the LabVIEW software application. Time interval for each measurement cycle is 1 s. For communication is used wireless sensor network based on communication standard IEEE 802.15.4 (Zigbee). Hardware configuration includes two wireless sensor modules SPaRCMosquito v.2, based on the microcontroller with Cortex M3 architecture. Transfer of measurement results, between computer and wireless sensor modules on transmitter and receiver points, are provided using standard USB interface.
LEVEL CROSSING RATE OF MACRODIVERSITY OUTPUT PROCESS IN THE PRESENCE OF η-μ SHORT TERM FADING AND GAMMA LONG TERM FADING
Authors: Milosavljević Srđan , Milić Dejan , Trajković Slaviša , Spalević Petar , Milosavljević Bojana 
Published: December 2017

In this paper macrodiversity reception with macrodiversity selection combining (SC) receiver and two microdiversity MRC receivers operating over shadowed multipath fading channel is studied. Received signal experiences short term fading and correlated Gamma long term fading resulting in system performance degradation. Level crossing rate (LCR) of η-μ random process and level crossing rate of signals at outputs of microdiversity MRC receivers are efficiently calculated. By using these derived formulas, level crossing rate of macrodiversity SC receiver output signal process is calculated. By using this result, average fade duration (AFD) of the proposed wireless communication system can be calculated. The influence of η-μ short term fading severity parameter, Gamma long term fading severity parameter and Gamma long term correlation coefficient on level crossing rate is analysed and studied.
MIGRATION AS A FACTOR OF CHANGING THE ECONOMIC AND DEMOGRAPHIC PROFILE OF THE EUROPEAN UNION
Authors: Đorđević Dejan Ž. , Šantić Danica 
Published: December 2017

In the age of raising global migration flows and increased mobility of the labour force in the world, there is a need to understand the main determinants of this phenomenon and to direct the focus of migration research to the various challenges it brings. This is a very important theme, especially in Europe, because 2014 and 2015 were the years of the highest number of immigrants, since WWII. Migrants are economic migrants and refugees, but in unique term they are asylum seekers as they want to stay, live and work in EU countries. Their population structure is quite different from that of EU population: they are young and in optimum reproductive and working age. Is that going to change not only quantitative, but also qualitative characteristics of population living in EU countries which are facing population decline or stagnation, low fertility rate, ageing and lack of labor force? Can we expect the redistribution of EU population due to intensive migration flows in certain countries, or a change in religious structure of the continent? Those are the questions of great importance because the migration flows today are shaping the future of EU population.
UNE APPROCHE PRAGMATIQUE DE L’ANALYSE DU DISCOURS ET SON APPLICATION À LA DIDACTIQUE DU FRANÇAIS SUR OBJECTIF SPECIFIQUE
Authors: Živković Danijel 
Published: December 2017

Aujourd’hui, la communication est devenue une composante essentielle du travail et les compétences communicatives sont recherchées pour la majorité des postes de travail. La qualité des interactions est d’une grande importance pour améliorer la performance des entreprises. Étant donné que les compétences pragmatiques représentent l’un des éléments indispensables des compétences communicatives générales, notre intérêt est de révéler la manifestation de certaines caractéristiques pragmatiques du discours. Comment une approche pragmatique de l’analyse du discours peut contribuer à la didactique du français sur objectif spécifique (FOS)? La pragmatique vise à comprendre dans quelle mesure les échanges verbaux dépassent un simple échange d’information et influencent l’interlocuteur vers une action ou vers un changement de comportement, d’attitude, de la croyance, de la valeur, etc. Alors, une approche pragmatique de l’analyse du discours devrait décrire les éléments discursifs dans le discours, tels que l’organisation et la structuration des phrases, l’articulation des propositions dans le texte, l’organisation thématique et logique, la cohérence et la cohésion, la construction de l’argumentation etc. À cet effet, nous analyserons un corpus constitué des phrases issues du discours économique et commercial.
Strategi Komunikasi Persuasif Dalam Menciptakan Masyarakat Sadar Wisata Di Kawasan Wisata Pantai Padang, Kota Padang
Authors: Hanana Alna , Elian Novi , Marta Revi 
Published: December 2017

Tourism is an important asset to regional income and a place of creativity promote the region characteristics. This study aims to analyze persuasive communication strategy conducted by Government, analyzing the communication barriers that occur in the process of forming a tourism conscious society, and purpose the mode of persuasive messages and effective communication media designed to build a tourism conscious society. This study uses a qualitative approach to get the facts from the symptoms that exist and seek information factually. The results show the main persuasive communication strategy undertaken by the government is forming a ‘pokdarwis’ (tourism awareness group). However, this strategy can still be used in various forms, such as: pokdarwis has not acted as an agent of change, unclear tasks distribution in pokdarwis group, un-maximized media, uncontinuity press release, and no synergy among stakeholders. A persuasive message form that can be designed to maximize this communication strategy can be a one-sided and two-sided message. The good government and groups that have been formed this hopefully can use the media consistently so that messages can reach various layers of society. Media that could be matches with the target audience were print media media, outdoor media, group communication media, personal communication channels and internet. Pariwisata merupakan asset yang sangat penting dalam menyumbang terhadap pendapatan daerah dan ajang kreativitas untuk memperkenalkan ciri khas daerah. Untuk itu, penting strategi komunikasi persuasif sebagai faktor penarik kunjungan wisatawan. Penelitian ini bertujuan menganalisis strategi komunikasi persuasif yang dilakukan oleh Pemerintah Kota Padang, hambatan komunikasi dalam proses pembentukan masyarakat sadar wisata, dan menawarkan pesan persuasif dan media komunikasi efektif yang dapat dirancang untuk membentuk masyarakat sadar wisata. Penelitian ini menggunakan pendekatan kualitatif untuk memperoleh fakta-fakta dari gejala-gejala yang ada dan mencari keterangan secara faktual. Hasil penelitian menunjukkan strategi komunikasi persuasif utama yang dilakukan oleh pemerintah berupa pembentukan pokdarwis (kelompok sadar wisata). Strategi ini masih menemui berbagai hambatan dalam pelaksanaannya, seperti: pokdarwis belum bertindak sebagai agent of change, tidak duduknya tugas di kelompok pokdarwis, media yang belum dimaksimalkan, tidak adanya kontinuitas press release, dan tidak adanya sinergi antar stakeholder. Bentuk pesan persuasif yang dapat dirancang untuk memaksimalkan strategi komunikasi ini bisa berupa one-side issue dan two-side issue message. Media yang cocok dengan target khalayaknya di antaranya media cetak, media luar ruang, media komunikasi kelompok, saluran komunikasi pribadi dan internet.
Intensive Blood Pressure Lowering in Patients With and Patients Without Type 2 Diabetes: A Pooled Analysis From Two Randomized Trials
Authors: Brouwer Tom F. , Vehmeijer Jim T. , Kalkman Deborah N. , Berger Wouter R. , van den Born Bert-Jan H. , Peters Ron J. , Knops Reinoud E. 
Published: December 2017

OBJECTIVE
The Action to Control Cardiovascular Risk in Diabetes Blood Pressure (ACCORD-BP) study did not find a significant beneficial effect of intensive systolic blood pressure (SBP) lowering on cardiovascular events in hypertensive patients with type 2 diabetes mellitus (T2DM), while the Systolic Blood Pressure Intervention Trial (SPRINT) did find a significant beneficial effect in patients without T2DM. The objective of this analysis was to assess the effect of both T2DM and baseline cardiovascular disease risk on the treatment effect of intensive blood pressure lowering.

RESEARCH DESIGN AND METHODS
The individual patient data from the ACCORD-BP and SPRINT studies were pooled and follow-up durations harmonized. Both studies randomized hypertensive patients to an SBP target of &lt;120 mmHg or a target of &lt;140 mmHg. The composite primary end point consisted of unstable angina, myocardial infarction, acute heart failure, stroke, and cardiovascular death. The interaction between intensive blood pressure lowering and both T2DM and 10-year cardiovascular risk was assessed using Cox proportional hazards models.

RESULTS
The cohort consisted of 14,094 patients with mean age 66 ± 8.9 years and mean baseline SBP 139.5 ± 15.6 mmHg; 33.6% had T2DM. The hazard ratio for the primary composite end point was 0.82 (95% CI 0.73–0.93), P = 0.0017. The interaction between intensive blood pressure lowering and T2DM was nonsignificant (P = 0.13). The 10-year cardiovascular risk was higher in primary prevention patients with T2DM, but risk did not interact with the treatment effect (P = 0.84).

CONCLUSIONS
Intensive blood pressure lowering may have a similar favorable effect and appears to decrease cardiovascular events in both patients with and patients without T2DM.
DIREITOS AUTORAIS E A CONTEMPORANEIDADE: RESPONSABILIZAÇÃO DOS SERVIDORES DE COMPUTAÇÃO EM NUVEM
Authors: Amaral Ana Cláudia Corrêa Zuin Mattos , Zerbini Maiara Santana 
Published: December 2017

Este artigo analisa a vulnerabilidade que os avanços tecnológicos, notadamente a conectividade em rede e a computação em nuvem, representam aos direitos de autor. Uma análise conceitualé relevante para identificar a natureza jurídica do direito autoral. Fundamentado no método dedutivo, o estudo abordaos percalços em se identificar o agente causador do dano na dimensão virtual. Identifica-se que a atividade desenvolvida trata-se de uma prestação de serviço, acarretando responsabilidade quanto à execução de seus serviços.Palavras-chaves: Direito de Autor. Tecnologia. Internet. Pirataria. Computação em Nuvem.Abstract: The study examines the vulnerability that technological advances, notably network connectivity and cloud computing, represent to copyright. A conceptual analysis is relevant to identify the legal nature of copyright. Based on the deductive method, the study addresses the mishaps in identifying the agent that causes the damage in the virtual dimension. It is identified that the activity developed is a service provision, causing responsibility for the execution of its services.Keywords: Copyright. Technology. Internet. Piracy. Cloud Computing.
Pollen–pistil interaction in pawpaw (Asimina triloba), the northernmost species of the mainly tropical family Annonaceae
Authors: Losada Juan M. , Hormaza Jose I. , Lora Jorge 
Published: December 2017

PREMISE OF THE STUDY:The pawpaw, Asimina triloba, is an underutilized fruit crop native to North America that belongs to the mainly tropical, early‐divergent family Annonaceae. Asimina is the only genus within the Annonaceae with species adapted to cold climates. A thorough analysis of its reproductive biology, specifically pollen–pistil interaction during the progamic phase, is essential to understand both its adaptation to cold climates and how to optimize its fertilization and fruit set.METHODS:We characterized pollen–pistil interaction in Asimina triloba, including the floral cycle and anatomy, stigmatic receptivity, and the pollen tube pathway. We used a combination of histological, cytological, and immunolocalization approaches.KEY RESULTS:Asimina triloba has a gynoecium formed by plicate carpels with a short stylar canal. Unicellular papillae form a continuous tissue covered by a copious secretion from the stigma to the ovary, which is most prominent on the stigma surface where it forms an extragynoecial compitum. Compared to the stigmas of other species in the Annonaceae, the stigmas of A. triloba show a long stigmatic receptivity associated with a long flowering cycle. Stigmatic receptivity is concomitant with the secretion of cell‐wall‐related arabinogalactan proteins (AGPs).CONCLUSIONS:A long female phase with a long period of stigmatic receptivity is unusual among protogynous flowers of the magnoliid clade, suggesting a derived condition of A. triloba within the Annonaceae. This phase further correlates with the presence of cell‐wall‐related arabinogalactan proteins in the secretion, which may indicate the conservation of these glycoproteins during stigmatic receptivity and pollen tube growth in angiosperms.
Absolute Properties of the Pulsating Post-mass Transfer Eclipsing Binary OO Draconis
Authors: Lee Jae Woo , Hong Kyeongsoo , Koo Jae-Rim , Park Jang-Ho 
Published: December 2017

Abstract
OO Dra is a short-period Algol system with a δ Sct-like pulsator. We obtained time-series spectra between 2016 February and May to derive the fundamental parameters of the binary star and to study its evolutionary scenario. The radial velocity (RV) curves for both components were presented, and the effective temperature of the hotter and more massive primary was determined to be

K by comparing the disentangling spectrum and the Kurucz models. Our RV measurements were solved with the BV light curves of Zhang et al. using the Wilson-Devinney binary code. The absolute dimensions of each component are determined as follows: M
1 = 2.03 ± 0.06

, M
2 = 0.19 ± 0.01

, R
1 = 2.08 ± 0.03

, R
2 = 1.20 ± 0.02

, L
1 = 18 ± 2

, and L
2 = 2.0 ± 0.2

. Comparison with stellar evolution models indicated that the primary star resides inside the δ Sct instability strip on the main sequence, while the cool secondary component is noticeably overluminous and oversized. We demonstrated that OO Dra is an oscillating post-mass transfer R CMa-type binary; the originally more massive star became the low-mass secondary component through mass loss caused by stellar wind and mass transfer, and the gainer became the pulsating primary as the result of mass accretion. The R CMa stars, such as OO Dra, are thought to have formed by non-conservative binary evolution and ultimately to evolve into EL CVn stars.