bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multistability Control of Hysteresis and Parallel Bifurcation Branches through a Linear Augmentation Scheme
Authors: Fozin T. Fonzin , Leutcho G. D. , Kouanou A. Tchagna , Tanekou G. B. , Kengne R. , Kengne J. , Pelap F. B. 
Published: December 2019

Abstract
Multistability analysis has received intensive attention in recently, however, its control in systems with more than two coexisting attractors are still to be discovered. This paper reports numerically the multistability control of five disconnected attractors in a self-excited simplified hyperchaotic canonical Chua’s oscillator (hereafter referred to as SHCCO) using a linear augmentation scheme. Such a method is appropriate in the case where system parameters are inaccessible. The five distinct attractors are uncovered through the combination of hysteresis and parallel bifurcation techniques. The effectiveness of the applied control scheme is revealed through the nonlinear dynamical tools including bifurcation diagrams, Lyapunov’s exponent spectrum, phase portraits and a cross section basin of attractions. The results of such numerical investigations revealed that the asymmetric pair of chaotic and periodic attractors which were coexisting with the symmetric periodic one in the SHCCO are progressively annihilated as the coupling parameter is increasing. Monostability is achieved in the system through three main crises. First, the two asymmetric periodic attractors are annihilated through an interior crisis after which only three attractors survive in the system. Then, comes a boundary crisis which leads to the disappearance of the symmetric attractor in the system. Finally, through a symmetry restoring crisis, a unique symmetric attractor is obtained for higher values of the control parameter and the system is now monostable.
Photoelectrochemistry of Ferrites: Theoretical Predictions vs. Experimental Results
Authors: Ulpe Anna C. , Bauerfeind Katharina C.L. , Granone Luis I. , Arimi Arsou , Megatif Lena , Dillert Ralf , Warfsmann Sven , Taffa Dereje H. , Wark Michael , Bahnemann Detlef W. , Bredow Thomas 
Published: December 2019

AbstractThis paper gives an overview about recent theoretical and experimental work on electronic and optical properties of spinel ferritesMFe2O4. These compounds have come into focus of research due to their possible application as photocatalyst material for photoelectrochemical water splitting. The theoretical background of state-of-the-art quantum-chemical approaches applied for predicting electronic and optical band gaps, absolute band positions, optical absorption spectra, dielectric functions and Raman spectra, is briefly reviewed. Recent applications of first-principles methods on magnetic and electronic properties of ferrites withM= Mg and the first row of subgroup elements Sc to Zn are presented, where it is shown that the fundamental band gap is strongly dependent on the spin state and the degree of inversion of the spinel structure. The observed variation of electronic properties may serve as an explanation for the large scattering of experimental results. The exchange ofMand Fe cations has also a pronounced effect on the Raman spectra of ferrites, which is analyzed at atomic scale from first principles. Calculated optical absorption spectra of ferrites are compared to experimental spectra. The electronic nature of the first excitations and the role of oxygen vacancies are discussed. For the calculation of absolute band positions, which have a significant impact on the photoelectrochemical activity of the ferrites, models of the most stable ferrite surfaces are developed that take into account their polar nature and the interaction with the solvent. Theoretically predicted valence and conduction band edges are compared to results from electrochemical measurements. The role of cation exchange on the surface electronic structure is investigated both theoretically and experimentally.
Co3O4/BiVO4 Heterostructures for Photochemical Water Oxidation: The Role of Synthesis Parameters and Preparation Route for the Physico-Chemical Properties and the Catalytic Activity
Authors: Heimann Manuel , Friedel Ortega Klaus , Behrens Malte 
Published: December 2019

Abstract
The synthesis conditions of the semiconductor BiVO4 have marked influence on its physicochemical and photocatalytic properties. In this work, a pH-controlled co-precipitation route was systematically investigated. Special attention was paid to the pH value during co-precipitation and co-precipitate post-treatment. In a sacrificial photocatalytic water oxidation test, the highest activity was observed for a sample precipitated at pH = 1 and 70 °C, which was post treated at 600 °C in air for 3 h after washing and drying. The activity was further improved by another 90% by the addition of the Co3O4-based co-catalyst. Good synergy between semiconductor and co-catalyst was obtained for the deposition of pre-formed nanoparticles at a loading of 0.1 w% (physical impregnation). The effects of different synthesis conditions of the semiconductor and impregnation method for the co-catalyst on the structure, morphology and optical properties of the catalysts were investigated by PXRD, SEM, UV-vis spectroscopy, and TEM, while the water oxidation activity was compared in the dark and with the aid of visible light using cerium (IV) or silver (I) as sacrificial agents, respectively, with the aim of establishing structure-activity correlations. The roles of semiconductor particle anisotropy and co-catalyst particle distribution for optimal photo-activity in the oxygen evolution reaction are discussed.
Trajectories and Predictors of Functional Capacity Decline in Older Adults From a Brazilian Northeastern Hospital
Authors: Menezes Karla V. R. S. , Auger Claudine , Barbosa Juliana F. S. , Gomes Cristiano S. , Menezes Weslley R. S. , Guerra Ricardo O. 
Published: December 2019

Background and Purpose:
Older adults face increased risk of loss of functional capacity both before and during hospitalization, so identifying older adults at risk for loss in functional capacity during hospitalization would help researchers and clinicians make informed decisions. This study aims to evaluate functional changes from preadmission (baseline) until discharge of hospitalized older adults and identify predictors of loss in functional capacity.

Methods:
This is a prospective cohort study conducted at a tertiary care hospital in Natal, Brazil, and enrolled all consecutive patients aged 60 years and older between January 1, 2014, and April 30, 2015. Independent variables included personal characteristics, instrumental activities of daily living (IADL) (evaluated by the Lawton and Brody scale), cognition (evaluated by the Leganés cognitive test), depression (assessed by the Geriatric Depression Scale—15), and in-hospital mobility (evaluated by the Short Physical Performance Battery). The dependent variable functional capacity was assessed by the Katz scale. These instruments were applied at 2 different times: upon admission (within first 24 hours) and at discharge (12-24 hours before). Functional trajectories were defined as the course of functioning from preadmission until discharge using functional capacity data. A multivariate analysis with generalized estimating equation estimated the longitudinal changes in functional capacity.

Results and Discussion:
The final sample consisted of 1191 older adults and 53.9% were less than 70 years of age. Regarding changes in functional capacity, 52.5% of the older adults presented worse functional capacity at discharge than at baseline. Being dependent for IADL instrumental daily living activities, the presence of depressive symptoms, low levels of cognition, and in-hospital mobility were risk factors for greater loss in functional capacity during a hospitalization event.

Conclusion:
Hospitalization events may be catastrophic for functional capacity in older adults in Brazil. Functional, cognitive, and emotional status and in-hospital mobility must be carefully assessed at hospital admission and monitored during hospitalization. Effective strategies for preventing loss in functional capacity in older people must improve in the Brazilian hospital system.
Brain-Derived Neurotrophic Factor Has a Transsynaptic Trophic Effect on Neural Activity in an Adult Forebrain Circuit
Authors: Miller Kimberly E. , Wood William E. , Brenowitz Eliot A. , Perkel David J. 
Published: December 2019

While hormone-driven plasticity in the adult brain is well studied, the underlying cellular and molecular mechanisms are less well understood. One example of this is seasonal plasticity in the avian brain, where song nuclei exhibit hormonally driven changes in response to changing photoperiod and circulating sex steroid hormones. Hormone receptor activation in song nucleus HVC (proper name) elicits a robust change in activity in target nucleus RA (robust nucleus of the arcopallium), but the molecular signal responsible for this is unknown. This study addressed whether brain-derived neurotrophic factor (BDNF) mediates a transsynaptic effect from HVC to RA in male Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii).In situhybridization confirmed an increase in BDNF expression in HVC neurons of birds switched to a long-day (LD) photoperiod plus systemically elevated testosterone (T) levels, compared with short-day (SD) conditions. BDNF expression was virtually absent in RA neurons of SD birds, increasing to barely detectable levels in a small subset of cells in LD+T birds. Infusion of BDNF protein adjacent to the RA of SD birds caused an increase in the spontaneous neuron firing rate. Conversely, the infusion of ANA12, a specific antagonist of the tyrosine-related kinase B (TrkB) for BDNF, prevented the increase in RA neuron firing rate in LD+T birds. These results indicate that BDNF is sufficient, and TrkB receptor activation is necessary, for the transsynaptic trophic effect exerted by HVC on RA. The dramatic change in the activity of RA neurons during the breeding season provides a clear example of transsynaptic BDNF effects in the adult brain in a functionally relevant circuit.SIGNIFICANCE STATEMENTSex steroid hormones drive changes in brain circuits in all vertebrates, both within specific neurons and on their synaptic targets. Such changes can lead to profound changes in behavior, but little is known about the precise molecular mechanisms that underlie this process. We addressed this question in a seasonally breeding songbird and found that the trophic effects of one forebrain song nucleus on its target are mediated transsynaptically by the neurotrophin BDNF. This suggests that, in addition to their role in development, neurotrophins have critical roles in adult brain plasticity.
Dissolved Oxygen Balance Model for Neris
Authors: Gaudenta  
Published: December 2019

We consider a dissolved oxygen balance model for Neris, which includes biochemical oxygen demand, nitrification, sedimentation, algae respiration and photosynthesis. The load from point sources, tributaries and distributed sources are taken into account. Long-term systematic components such as drift and seasonal components are analysed by applying time series analysis.
The model is adapted according to the State Environmental Monitoring, and source data of controlled pollution covering the period 1978-1998.
Reflexiones sobre el carácter situado de la ciencia: sus aportes para una historia de la microbiología en América Latina.
Authors: Matharan Gabriel Augusto 
Published: December 2019

El presente trabajo tiene como objetivo presentar una primera problematización de tres temas que la historiografía de la ciencia contemporánea considera centrales analizar a partir de reconocer el carácter situado de la actividad científica y de cómo pueden enriquecer una historia de la microbiología en América Latina. Con tal fin se abordan los aspectos temporales, espaciales y de género de la ciencia. El trabajo muestra que entender la microbiología de la manera situada en Latinoamérica requiere hacer visible una multiplicidad de espacios, tiempos y márcas de género en sus mutuas articulaciones.
Uso y abuso de los animales: responsabilidades éticas de la Psicología
Authors: González Suárez Mirta 
Published: December 2019

Desde sus inicios la Psicología ha tenido relación con especies no humanas, utilizándolas de diversas maneras. En los clásicos estudios de Pavlov y Skinner se evidencia la crueldad reiterada, e incluso investigaciones más recientes revelan también el uso impune de procedimientos dolorosos. Cabe señalar que desde el siglo pasado existen indicios sobre la tortura a animales en personas menores de edad y posterior conducta violenta hacia humanos, de manera que ésta se asocia a trastornos en el ICD-10 y DSM-5.
Al analizar la relación con los animales destaca también su utilización en procesos terapéuticos, sobre todo con la participación de perros, gatos y equinos, los cuales aportan beneficios a la salud mental. Sin embargo, de manera generalizada se observa una tendencia humano-céntrica, si bien, cabe destacar, existen avances éticos que indican que los seres sintientes tienen derechos, y deben ser respetados.
El artículo presenta un resumen desde la psicología sobre la relación inter-especies, concluyendo que es necesaria una aproximación en el marco de los derechos de los animales. Es urgente el desarrollo de la investigación-acción que promueva la empatía con los animales y motive la educación por una cultura de paz y respeto a los seres sintientes y al entorno en general.
A dos décadas de la Convención de Belem do Pará: Una caracterización de la investigación psicológica sobre la violencia contra las mujeres realizada en la Universidad de Costa Rica, período 1994-2016
Authors: Fernández Adriana Rodríguez , Akoka-Rovinski Mijal 
Published: December 2019

Este artículo presenta una caracterización de la investigación psicológica producida en la Universidad de Costa Rica en materia de violencia contra las mujeres durante el período comprendido entre los años 1994 a 2016. Se pretende mostrar la ruta que se ha seguido en el estudio psicológico de dicha problemática, las principales tendencias, ámbitos y contextos de la investigación desarrollada durante las dos décadas posteriores a la ratificación de la Convención Interamericana para Prevenir, Sancionar y Erradicar la Violencia contra lasMujeres.El análisis realizado permitió vislumbrar los principales desafíos para la producción del conocimiento psicológico que da cuenta de la violencia contra las mujeres en el país. A partir de este trabajo, se espera generar insumos que permitan direccionar nuevas líneas de investigación a través de proyectos y trabajos finales de graduación que aborden diversas dimensiones para el abordaje de la violencia contra las mujeres en Costa Rica.Palabras clave: violencia contra las mujeres, investigación, psicología, estado del arte.
Two-Stage Anaerobic Co-digestion of Landfill Leachate and Starch Wastes Using Anaerobic Biofilm Reactor for Methane Production
Authors: Darwin  , Triovanta Ulfa , Rinaldi Ridho 
Published: December 2019

Abstract
The study aims to evaluate two-stage anaerobic co-digestion of leachate and starch waste using anaerobic biofilm bioreactor to enhance methane production. The anaerobic digestion process was operated under the mesophilic condition at 35 ± 1 °C. Hydraulic retention time (HRT) applied to the acidogenesis and methanogenesis reactors were 5 and 25 days, respectively. The organic loading rate (OLR) used in the process of acidogenesis was 2.91 gram volatile solid /L.day, while methanogenesis was 0.58 gram volatile solid (VS) per liter per day. Results showed that two-stage process using biofilm was an effective method for operating anaerobic co-digestion of starch waste and landfill leachate in which the system produced higher methane yield at 125.11 mL methane (CH4) per gram volatile solid (VS) added (mL.CH4/g.VS.added) in comparison to the single-stage process (20.57 mL CH4/g.VS.added) and two-stage process (77.60 mL CH4/g.VS.added) without using biofilm. Two-stage process using biofilm also effectively reduced organic matters in the culture in which the system reached 61% BOD removal in comparison to the single-stage process and two-stage process without biofilm that only had 27.6 and 39.3% BOD removal, respectively. This study suggested that the two-stage process using biofilm would be the preferred technique for treating starch waste and landfill leachate.
Considerations of Regional Coherences for the Development of Renewable Energy Technologies Used in South Part of Transdanubian Region of Hungary
Authors: Illes Zoltan , Szendro Peter , Unk Janosne 
Published: December 2019

Abstract
The existing effective domestic regional development framework requires analyses for increasingly wider areas (micro, meso and even macro regions) before operational – short-term – local developments to be prepared and implemented.
Such comprehensive complex studies or larger-term programmes may demonstrate the profitability of the given project and can complement it with combined utilization technologies; in the case of Himesháza several locally known renewable energy sources could facilitate geothermal heat, later electricity supply, e.g. local biomass (biogas-based) recovery technology (organic waste of the local pig farm) and, for example, the construction of a low-power “dwarf” hydroelectric power plant chain based on rich watercourses of the region (the “southern dwarves” in Hungary) and the connection of existing solar utility facilities to a modern “smart grid” system in the longer term.
Himesháza, located in southern Hungary in Baranya county, is developing; it has a detailed feasibility study of a thermal energy supply network and an energy supply development plan.
Based on the geothermal characteristics of Baranya county it would be reasonable to encourage the development of smaller-scale, decentralized heating systems for dynamic settlements. Several settlements in close proximity to Himesháza have already explored thermal wells. Power generation with a small scale, closed-loop system can be used in the project region for thermal water with an outflow temperature of 90 °C. The heating system may also be able to fulfill the needs of recreational, vacation-based or complex thermal spa facilities formerly planned in the region. Moreover, the system could also be capable of utilizing a larger spectrum of renewable energy through its combination with photovoltaic technology.
Due to the country's favorable agricultural characteristics, Hungary's biomass potential is higher than the European average. The utilization of organic waste from agricultural and farming sectors is highly recommended in Baranya county; biogas production seems to be the most suitable in the region of Himesháza too, broadening the utilization of renewable resources.
The realization of the current project could contribute to shifting the energy resource sector in a more modern, environmentally conscious direction.
The background for shorter-term plans and investment (carried out within the framework of operational programs) necessary for the optimal operation and maintenance of longer-term (25–50 years) energy development strategies is created by the analysis (at multiple scales) of complex regional characteristics and future potential, and the selection of optimal sites.
Single-Center Experience with Ifosfamide Monotherapy as Second-Line Treatment of Recurrent/Metastatic Osteosarcoma
Authors: Verschoor Arie Jan , Speetjens Frank M. , Dijkstra P.D. Sander , Fiocco Marta , Sande Michiel A.J. , Bovée Judith V.M.G. , Gelderblom Hans 
Published: December 2019

AbstractBackgroundThe effectiveness of second-line palliative chemotherapy in patients with recurrent/metastatic osteosarcoma is not well defined. Several small studies (6–19 patients) have reported on ifosfamide as second-line treatment. In this study we report our single-center experience with second-line ifosfamide monotherapy in patients treated for recurrent/metastatic osteosarcoma.MethodsA chart review was conducted of all patients with osteosarcoma treated with ifosfamide from 1978 until 2017. Until 1997 a 5 g/m2 regimen was used, and from 1997 onwards a 9 g/m2 regimen was used. Overall survival (OS) from start of ifosfamide was the primary endpoint. Progression-free survival (PFS) from start of treatment was also studied. To assess difference in survival between groups the log rank test was applied. To investigate the effect of ifosfamide dose and World Health Organization performance status (PS) a Cox proportional hazard regression model was estimated.ResultsSixty-two patients were selected with recurrent/metastatic osteosarcoma treated with second-line ifosfamide monotherapy (dose of 5 g/m2, n = 26; 9 g/m2, n = 36). OS was significantly better in univariate analysis for 9 g/m2 compared with 5 g/m2 (10.9 months [95% confidence interval (CI), 9.3–12.6] vs. 6.7 months [95% CI, 5.9–7.6], respectively) and for PS (median OS PS 0, 13.0 months [95% CI, 2.3–23.8]; PS 1, 8.2 months [95% CI, 5.4–11.1]; PS ≥2, 6.2 months [95% CI, 2.2–10.3]; and unknown PS, 5.4 months [95% CI, 2.2–8.5]). In multivariate analysis only PS showed a significant difference. No difference in PFS was found between 5 and 9 g/m2 ifosfamide treatment or PS.ConclusionThis study suggests that ifosfamide is an effective second-line treatment for patients with recurrent/metastatic osteosarcoma.
CFRP/Al-7075 istifli delmede matkap uç açılarının delinebilirlik üzerine etkisi
Authors: AYDIN Erman , NALBANT Muammer 
Published: December 2019

Bu çalışmada, askeri ve sivil havacılık alanında
yoğun olarak kullanılmakta olan karbon fiber takviyeli polimer kompozit (CFRP)
malzeme ve Al-7075 alaşımının oluşturduğu CFRP/Al-7075 istifli yapının, 120º-130º-140º
uç açılarına sahip kaplamasız karbür matkaplar ile delinebilirliği
araştırılmıştır. Delme süreçlerinde itme kuvveti (Fz), moment (Mz),
delik ortalama yüzey pürüzlülükleri (Ra), talaş yapıları ve CFRP
malzemede meydana gelen delaminasyonlar (Fd) incelenmiştir. Deneysel
çalışmalar kuru kesme şartlarında 50 m/dk.. kesme hızı ve 0,05 mm/dev. sabit
ilerleme değerinde, doğrudan delme yönteminde gerçekleştirilmiştir. 120° ve 130° uç açılı matkaplar CFRP malzemede
yakın Fz ve Fd değerleri sergilerken, uç açılarına göre
en düşük Fz, Mz, Ra ve en düşük Fd
verileri sırasıyla 130°-120º-140º uç açılı matkaplarda elde edilmiştir. 140° uç
açılı matkapta, esas kesici kenarda yoğun miktarda çapaklanma ve yığıntı talaş
(Built up edge BUE) meydana gelmiş ayrıca matkap helis kanallarında Al talaşları
sıvanmıştır. Deneysel çalışmaların ardından matkap uç açılarının itme kuvveti (Fz)
ve ortalama yüzey pürüzlülüğü (Ra) üzerine etkileri %95 güven
aralığında ANOVA ile belirlenmiş ve çoklu karşılaştırma testleri uygulanmıştır.
Sonuç olarak, 130º uç açılı kaplamasız karbür matkabın moment, itme kuvveti, ortalama
yüzey pürüzlülüğü ve delaminasyon bakımından belirtilen kesme parametreleri ve
delme koşulları doğrultusunda CFRP/Al-7075 istifli delme işleminde daha iyi
sonuçlar verdiği görülmüştür.
“Poesia é vertical”: Samuel Beckett e a criatividade vanguardista
Authors: Kempinska Olga 
Published: December 2019

Ao debruçar-se sobre o envolvimento de Samuel Beckett no surrealismo, evidenciado pela assinatura, em 1932, do manifesto “Poesia é vertical”, e culminado em Murphy, o artigo tenta resgatar alguns traços da teoria do sublime de Burke na visão vanguardista da criatividade. A acentuação da verticalidade subverte não apenas a experiência desencarnada do sublime, tal como conceituado na estética tradicional, como também insiste em sua reinterpretação no âmbito da psicanálise, permitindo, dessa forma, a elaboração de uma reflexão sobre o prazer do trabalho da escrita e sobre a relevância da destruição nos processos criativos. Constituindo uma resposta ao Segundo Manifesto do Surrealismo (1930), permeado pela violência, e coincidindo com a reformulação freudiana do processo da sublimação, no qual acontece a troca não apenas da direção da pulsão, mas também de seu objeto, o manifesto conta ainda com a assinatura de Hans Arp, abrindo-se, assim, a uma discussão sobre a importância da relação entre os regimes visual e verbal.