bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acción tutorial y el desarrollo de las competencias del ejercicio ciudadano democrático e intercultural
Authors: Gallarday-Morales Santiago , Flores-Asencios Alicia , Padilla-Guzmán Manuel , López-Novoa Ibis , Norabuena-Figueroa Emerson 
Published: May 2019

<p>El presente artículo aborda el tema de la tutoría y el desarrollo ciudadano en estudiantes de educación secundaria, el objetivo fue establecer la relación entre la acción tutorial y el desarrollo de las competencias del ejercicio ciudadano democrático e intercultural en estudiantes del quinto grado del nivel secundaria de instituciones públicas de la Red N° 06 del Callao. La investigación fue cuantitativa, no experimental, descriptiva correlacional, de tipo básica y transeccional, la población lo conformaron 489 estudiantes, siendo la muestra determinada por 215 estudiantes, a quienes se les aplico un cuestionario a modo de encuesta para recoger la información. Los resultados muestran que existe relación moderada y positiva entre la acción tutorial y el desarrollo de las competencias del ejercicio ciudadano democrático e intercultural, dado que el Rho de Spearman es igual a 0.404, con un valor de significación p = .003 en comparación con el α = .05 donde se constata que (p &lt; α). </p>
Epidemiological features and risk factors for acquiring Hepatitis B, Hepatitis C and syphilis in HIV-infected patients in Shaanxi Province, northwest China
Authors: Zhang Chao , Chang Wenhui 
Published: May 2019

Abstract
Background

HIV-infected patients are at higher risk for co-infection with Hepatitis B virus (HBV), Hepatitis C virus (HCV), and Treponema pallidum (TP), the agent causing syphilis, than the general population. The prevalence of HBV, HCV, and syphilis had geographic differences and varied from region to region among HIV-infected patients. The aim of this study was to investigate the epidemiological features and risk factors of HBV, HCV, and syphilis infection in HIV-infected individuals in Shaanxi Province, northwest China.

Methods

A retrospective study was conducted with HIV-infected patients from June 2011 to June 2016 in Shaanxi Province. Sociodemographic data was captured from the national HIV/AIDS information system in China. Serological tests and analysis of CD4+ T-cell count levels were performed using standard procedures. Besides, the HIV infection time and age were presumed by CD4+ T-cell count levels.

Results

The average time from HIV infection to diagnosis was (4.7±2.4) years, and the HIV infection time ≥3 years accounted for 66.8%. Of the discovery routes, voluntary counseling & testing (VCT) only accounted for 20.7%. Among 1018 HIV-infected patients, the prevalence of HBV, HCV, and syphilis was 11.0%, 11.1%, and 26.0%, respectively. HBV-HCV, HCV-syphilis, HBV-syphilis, and HBV-HCV-syphilis co-infection was 1.7%, 2.2%, 2.6%, and 0.1%, respectively. The rate of ineffective vaccination against HBV was as high as 30.2% in HIV-infected patients. Ethnicity (OR=29.257, 95%CI: 11.243-76.133) and HIV transmission routes (OR=149.368, 95%CI: 16.590-1 344.861) were the risk factors of HCV infection in HIV-infected patients. In the HIV-infected patients with the antibody of Treponema pallidum, the rate of homosexual transmission was so higher but heterosexual transmission is lower (OR=0.548 95% CI: 0.382-0.786), suggesting that homosexual transmission might be a risk factor for HIV-syphilis co-infection.

Conclusion

The HIV-infected patients in Shaanxi Province had the characteristics of low active detection rate and late diagnosis. In addition, a high prevalence of HBV, HCV, and syphilis co-infection could be observed, and like HIV infection, they might not understand their HBV, HCV and syphilis infection status. At last, the high rate of ineffective vaccination against HBV suggests a need for improved vaccination services.
Cross-resistance of the pathogenic fungus Alternaria alternata to fungicides with unrelated modes of action
Authors: Yang Li-Na , He Meng-Han , Ouyang Hai-Bing , Zhu Wen , Pan Zhe-Chao , Sui Qi-Jun , Shang Li-Ping , Zhan Jiasui 
Published: May 2019

Abstract
Background

Cross-resistance, a phenomenon that a pathogen resists to one antimicrobial compound also resists to one or several other compounds, is one of major threats to human health and sustainable food production. It usually occurs among antimicrobial compounds sharing the mode of action. In this study, we determined the sensitivity profiles of Alternaria alternata, a fungal pathogen which can cause diseases in many crops to two fungicides (mancozeb and difenoconazole) with unrelated mode of action using a large number of isolates (234) collected from seven potato fields across China.

Results

We found that pathogens could also develop cross resistance to fungicides with different modes of action as indicated by a strong positive correlation between mancozeb and difenoconazole tolerances to A. alternata. We also found a positive association between mancozeb tolerance and aggressiveness of A. alternata, suggesting no fitness penalty of developing mancozeb resistance in the pathogen and hypothesize that mechanisms such as antimicrobial compound efflux and detoxification that limit intercellular accumulation of natural/synthetic chemicals in pathogens might account for the cross-resistance and the positive association between pathogen aggressiveness and mancozeb tolerance.

Conclusions

The detection of cross-resistance among different classes of fungicides suggests that the mode of action alone may not be an adequate sole criterion to determine what components to use in the mixture and/or rotation of fungicides in agricultural and medical sects. Similarly, the occurrence of a positive association between the pathogen’s aggressiveness and tolerance to mancozeb suggests that one unforeseen consequence of intensive application of site non-specific fungicides might be selection for enhanced aggressiveness in pathogen populations, thereby posing a greater threat to agricultural production and human health. In this case, the use of evolutionary principles in closely monitoring populations and the use of appropriate fungicide applications are important for effective use of the fungicides and durable infectious disease management.
Dispersão e concentração espaciais dos cursos de Relações Internacionais no Brasil
Authors: Pfrimer Matheus Hoffmann , Okado Giovanni Hideki Chinaglia 
Published: May 2019

O crescimento acelerado dos cursos de Relações Internacionais (RI) no Brasil revelacontrastes e desafios. Esse processo de expansão pode ser periodizado em cinco momentos:protoperíodo, expansionismo privado, transição privado-pública, expansionismo público eperíodo de reconcentração geográfica. O penúltimo deles foi caracterizado pelo fomento públicode novos cursos de RI a partir do Programa de Apoio a Planos de Reestruturação e Expansãodas Universidades Federais (Reuni) em 2007. Nesse período, cria-se vários cursos de RI emuniversidades federais. Contudo, a aprovação da Emenda Constitucional n. 95 em 2016, queestabeleceu o contingenciamento de gastos públicos, parece marcar o fim desse período.Este artigo investiga a dispersão e a concentração espacial decorrente desse crescimento,demonstrando, por meio da análise espacial e quantitativa, a herança deixada pelo Reunipara a universalização do ensino de RI. Para tanto, utilizou-se dados secundários sobre os cursos de RI disponibilizados no Portal do Ministério da Educação e Cultura (E-MEC).A análise revela que a expansão de cursos de RI caracteriza-se pela concentração espacial, emque a lógica da universalização do ensino é suplantada pela exclusão espacial, originando umperíodo de reconcentração geográfica. Essa herança indica a estagnação do número de cursos.
Statistical performance analysis of transient-based extended blockage detection in a water supply pipeline
Authors: Keramat Alireza , Zanganeh Roohollah 
Published: May 2019

Abstract
The aim of the present research is to quantify the maximum feasible accuracy (location and size) for the transient-based blockage detection in a water supply pipeline. Owing to the randomness of transient measurements, a performance bound for the extended blockage detection exists which estimated parameters cannot exceed. The Cramér–Rao lower bound (CRLB) theorem is utilized to compute the lower bound variance of noise-induced estimation errors. It gives the minimum mean square error of any estimator according to information obtained from measurements and quantified by Fisher information. The Fisher information matrix is computed using direct differentiation of the compatibility equations obtained by the method of characteristics. The influence of relevant physical parameters including valve closure time, measurement time length and noise level on the best possible localization of blockage is investigated. The connection between the signal bandwidth, noise level and the performance limit is quantified for a typical case study. The results demonstrate trade-off between the size and the location/length of blockage estimates subject to different maneuver times, roughly offering half the wave speed times maneuver duration as the resolution limit.
Effect of cell structure and heat pretreating of the microorganisms on performance of a microbial fuel cell
Authors: Kadivarian Milad , Dadkhah Ali A. , Esfahany Mohsen Nasr 
Published: May 2019

Abstract
While microbial fuel cells are being considered as a tool for energy saving in wastewater treatment facilities, such applications in oil refineries pose a challenge due to harder acclimation of microorganisms. In this research, the effect of heat pretreating mixed culture microorganisms (MCM), and cell cross section, on the performance of a novel cell design with two cross sections (single chamber microbial fuel cells, with circular: SCMFC_CC and rectangular: SCMFC_RC cross section) fed batched with refinery wastewater were investigated. First, using original and heat pretreated MCM, the performance of SCMFC_CC in terms of chemical oxygen demand (COD) removal and electricity production was investigated. Then, using only the heat pretreated MCM, the electricity production of SCMFC_RC was measured and compared with that of SCMFC_CC. Heat pretreatment of MCM improved maximum open circuit voltage (OCV) and maximum power density generated by 14% and 16%, respectively. However, heat pretreatment reduced COD removal by about 4%. The performance of SCMFC_CC in terms of maximum OCV and power density compared to SCMFC_RC was improved by 41% and 279%, respectively. Heat treatment of MCM increases the electricity generation of the cell, while reducing the performance of COD reduction due to decreasing the microorganism varieties in the MCM.
Recent Advances in the Use of Algal Polysaccharides for Skin Wound Healing
Authors: Kumar Suneel , Marrero-Berrios Ileana , Kabat Maciej , Berthiaume Francois 
Published: May 2019

Background:Chronic skin wounds and pressure ulcers represent major health care problems in diabetic individuals, as well as patients who suffered a spinal cord injury. Current treatment methods are only partially effective and such wounds exhibit a high recurrence rate. Open wounds are at high risk of invasive wound infections, which can lead to amputation and further disability. An interdisciplinary approach is needed to develop new and more effective therapies.Methods:The purpose of this work is to review recent studies focusing on the use of algal polysaccharides in commercially available as well as experimental wound dressings. Studies that discuss wound dressings based on algal polysaccharides, some of which also contain growth factors and even living cells, were identified and included in this review.Results and Conclusion:Algal polysaccharides possess mechanical and physical properties, along with excellent biocompatibility and biodegradability that make them suitable for a variety of applications as wound dressings. Furthermore, algal polysaccharides have been used for a dual purpose, namely as wound covering, but also as a vehicle for drug delivery to the wound site.
One Pot Aqueous Synthesis of L-Histidine Amino Acid Capped Mn: ZnS Quantum Dots for Dopamine Sensing
Authors: Arunan Ravi , Joseph Printo , Sivakumar Muthusamy , Kiruba Daniel Suthanthira Cross Guevara 
Published: May 2019

Background:
Mn doped ZnS is selected as the right element which is prominent among
quantum dot for its high luminescent and quantum yield property and also non toxicity while comparing
with other organometallic quantum dot synthesized by using different capping agents.

Methods:
An interesting observation based on colorimetric sensing of dopamine using manganese
doped zinc sulfide quantum dot is discussed in this study. Mn doped ZnS quantum dot surface passivated
with capping agents such as L-histidine and also in polymers like chitosan, PVA and PVP
were studied and compared. The tunable fluorescence effect was also observed in different polymers
and amino acid as capping agents. Optical characterization studies like UV-Visible spectroscopy and
PL spectroscopy have been carried out. The functional group modification of Quantum dot has been
analyzed using FTIR and size and shape analysis was conducted by using HRTEM image.

Result:
The strong and broad peak of FTIR in the range of 3500-3300 cm-1 confirms the presence of
O-H bond. It is also observed that quenching phenomena in the luminescent peak are due to weaker
confinement effect. The average size of the particle is shown to be around 4-5 nm. Changes in color
of the quantum dot solution from transparent to dark brown has been due to the interaction with dopamine.

Conclusion:
Finally, L-Histidine amino acid capped Mn:ZnS shows better results in luminescence
and size confinement properties. Hence, it was chosen for dopamine sensing due to its colloidal nature
and inborn affinity towards dopamine, a neurotransmitter which is essential for early diagnosis
of neural diseases
68Ga/64Cu PSMA Bio-Distribution in Prostate Cancer Patients: Potential Pitfalls for Different Tracers
Authors: Calabria Ferdinando , Pichler Robert , Leporace Mario , Wolfsgruber Johannes , Coscarelli Pierluigi , Dunzinger Andreas , Schillaci Orazio , Cascini Giuseppe Lucio , Bagnato Antonio 
Published: May 2019

Background:68Ga-PSMA is a widely useful PET/CT tracer for prostate cancer imaging. Being a transmembrane protein acting as a glutamate carboxypeptidase enzyme, PSMA is highly expressed in prostate cancer cells. PSMA can also be labeled with 64Cu, offering a longer half-life and different resolution imaging. Several studies documented bio-distribution and pitfalls of 68Ga-PSMA as well as of 64Cu- PSMA. No data are reported on differences between these two variants of PSMA. Our aim was to evaluate physiological distribution of these two tracers and to analyze false positive cases.Methods:We examined tracer bio-distribution in prostate cancer patients with negative 68Ga-PSMA PET/CT (n=20) and negative 64Ga-PSMA PET/CT (n=10). A diagnostic pitfall for each tracer was documented.Results:Bio-distribution of both tracers was similar, with some differences due to renal excretion of 68Ga- PSMA and biliary excretion of 64Cu-PSMA. 68Ga-PSMA uptake was observed in sarcoidosis while 64Cu- PSMA uptake was recorded in pneumonitis.Discussion:Both tracers may present similar bio-distribution in the human body, with similar uptake in exocrine glands and high intestinal uptake. Similarly to other tracers, false positive cases cannot be excluded in clinical practice.Conclusion:The knowledge of difference in bio-distribution between two tracers may help in interpretation of PET data. Diagnostic pitfalls can be documented, due to the possibility of PSMA uptake in inflammation. Our results are preliminary to future studies comparing diagnostic accuracies of 68Ga-PSMA and 64Cu-PSMA.
PEER VIOLENCE AS PREDICTOR OF CYBERBULLYING AMONG ADOLESCENTS
Authors: Ivanovic Miroljub , Ivanović Uglješa 
Published: May 2019

The aim of this cross-sectional study was to examine individual, familial and peer variables as predictors of cyberbullying in early adolescence. The research included (N = 226) male students from Valjevo, aged 15.56 (SD = 0.68). The following measuring instruments were used: Socio-demographic Questionnaire, Violence Among School Children Questionnaire, Parent Behavior Questionnaire. The internal consistency of the questionnaire was examined using Cronbach’s alpha coefficient. The results of correlation analysis have shown minute and statistically significant correlation between the scores of applied variables. Hierarchical regression model has explained 36% of the variance of traditional peer violence and 10% of cyberbullying. All the examined variables have proven to be statistically significant predictors of traditional peer violence, but not cyberbullying. Seeing that the predictor variables of traditional peer violence partly explain cyberbullying, it is necessary to examine other potential determinants such as frequency of use of electronic media, electronic victimization and others, which would contribute to the prediction of the examined criterion. The applied questionnaires are of optimal use in everyday practice in Serbia and can provide relevant information in evaluating traditional peer violence and cyberbullying among preadolescents.
SURGICAL TREATMENT OF COMPLEX CROUZON SYNDROME CRANIOSYNOSTOSIS
Authors: Zdravkovic Aleksandra , Zivkovic Bojana , Micovic Mirko , Rasulic Lukas 
Published: May 2019

Crouzon syndrome is one of the most common syndromic craniosynostosis. We present complex course of treatment in a child with Crouzon syndrome presented with multisuture craniosynostosis and hydrocephalus. A 3-months-old boy was admitted with clinical signs of hydrocephalus and turribrachycephaly. Firstly, the hydrocephalus was addressed. The ventriculoperitoneal shunt with programmable valve was implanted. Secondly, in May 2017, posterior calvarial remodeling was done. Finally, after the child recovered, anterior calvarial remodeling with fronto-orbital advancement was performed. This completed the calvarial remodeling in this patient. Child is doing well, so far completing milestones of child development in time. This case presents an extremely complex case of syndromic multisuture craniosynostosis, in which it was necessary to perform the entire calvarial remodeling to correct the deformity and to provide a chance to the brain to grow and develop without constrictions.
PENGARUH CORPORATE GOVERNANCE TERHADAP TAX AVOIDANCE (Studi pada Perusahaan Manufaktur yang Terdaftar di BEI Tahun 2017)
Authors: Haryanti Agustin Dwi 
Published: May 2019

Penelitian ini bertujuan menguji dan menganalisis pengaruh corporate governance terhadap tax avoidance. Corporate governance diproyeksikan dengan dua variabel independen, yaitu proporsi komisaris independen dan jumlah komite audit. Sedangkan tax avoidance sebagai variabel dependen diproyeksikan dengan effective tax rate. Penelitian menghasilkan kesimpulan bahwa komisaris independen dan jumlah komite audit berpengaruh terhadap effective tax rate meskipun tidak terlalu signifikan.Kata Kunci : tata kelola; pajak; penghindaran
Taxonomic position and glochidia from the freshwater mussel, Anodonta luteola (Unionoida: Unionidae), in Costa Rica
Authors: Cruz Rafael A. , Quesada Rebeca 
Published: May 2019

Glochidia larvae from Anodonta luteola were observed in gills of Oreochromis niloticus from a farm in Cañas, Guanacaste. Samples were taken and analyzed by electron microscopy (SEM) and light microscopy. Glochidia were 311, 8μm total length (TL), 331,7μm totalheight (TH), and 251,1μm hinge dorsal length (HDL). Anodonta has 21species reported for the Panamica province, and A. luteola has five synonyms, often used in different reports.
Food Insecurity Screening Among Families of Children With Diabetes
Authors: Vitale Michele , Dorado Linda , Pais Vanita , Sidani Souraya , Gucciardi Enza 
Published: May 2019

Little is known about screening in clinical settings for food insecurity (FI) among households of children with diabetes. This study evaluated the acceptability and feasibility of an FI screening initiative in a pediatric diabetes clinic that was implemented to help diabetes dietitian educators tailor management plans for families of children with type 1 or type 2 diabetes facing FI.
The initiative comprised three validated screening questions, a care algorithm, a community resource handout, and a poster. In total, 50 families of children and adolescents aged 0–18 years with type 1 or type 2 diabetes were screened for FI. In-person semi-structured interviews combining open-ended and Likert-scale questions were conducted with 37 of the screened families and the three diabetes dietitian educators who conducted the screening. Perceived barriers and facilitators of the screening initiative were identified using content analysis, and Likert-scale questionnaires rated interviewees’ comfort level with the screening questions. A reflective journal kept by an onsite research interviewer also facilitated the data interpretation process.
Most families felt comfortable answering the screening questions. Families with FI appreciated the opportunity to express their concerns and learn about affordable food resources. However, ∼20% of these families described stigma and fear of judgment by clinicians if they screened positive for FI. Diabetes educators also felt comfortable with the screening questions but reported lack of time to screen all families and to follow-up with resources after a positive screen. A self-reported intake form was recommended to ensure that everyone is systematically screened.
A standardized and respectful method of assessing FI could help clinicians better tailor treatment plans and support for families of children with diabetes who face FI. Based on these findings, similar FI screening initiatives should be implemented in other clinical settings as part of routine clinical practice.
Estudo de caso: análise financeira da rentabilidade no transporte aéreo baseado em informações públicas e sua relação com o custo do petróleo no resultado operacional das cias. aéreas
Authors: Scholz Luiz Fernando De Barros , Santos Fernando De Almeida 
Published: May 2019

Este artigo apresenta análise do mercado brasileiro da aviação comercial. O interesse pela pesquisa consiste no fato de que o concentrado, ou seja, com poucos players. Por meio de estudo de caso, utilizou-se informações reportadas, demonstrações contábeis e outros dados, que possibilitaram métricas para analisar a lucratividade / rentabilidade das Cias. Observou-se que o planejamento empresarial e econômico dessas empresas e seus gestores conseguem adaptar-se rapidamente aos custos do querosene de aviação (QAV1), com variações de preços em todos os aeroportos nacionais em virtude da variação da alíquota do ICMS. O alto custo do QAV1 no Brasil é refinado e disponibilizado pela Petrobrás e distribuído por 3 empresas, sendo a principal uma subsidiaria da BR Distribuidora de Petróleo, com 61,4% do mercado e pertencente ao grupo Petrobrás. Pela convenção com empresas internacionais de aviação, o preço do QAV1 no Brasil é isento do ICMS, mas mesmo assim, é alto, em relação aos valores praticados externamente. A burocracia e os custos penalizam as operações e as incertezas econômicas, com o baixo crescimento do PIB brasileiro e a necessidade de redução do total de aeronaves em operação e dos Slot (aeroportos atendidos). mesmo com taxas de juros externas negativas. As receitas em reais e o leasing das aeronaves em dólar, expõe a riscos maiores. As empresas não criam opções para redução do principal custo - QAV1 - mesmo com a importação liberada. A baixa da commodity petróleo não foi prevista pelas Cias. aéreas e sua redução não tem possibilitado lucros maiores no exercício. Mesmo com o aumento da quantidade de passageiros transportados, não se obtém a rentabilidade econômica – financeira esperada, resultando em destruição de riqueza na operação.