bluuebunny/crossref_metadata_2025 huggingface dataset:
Mitoneet mediates TNFα induced necroptosis promoted by fructose and ethanol exposure
Authors: Shulga Nataly , Pastorino John G.
Published: December 2013

Fructose and ethanol are metabolized principally in the liver and are both known to contribute to the development of hepatic steatosis that can progress to hepatic steatohepatitis. The present study indentifies a synergistic interaction between fructose and ethanol in promoting hepatocyte sensitivity to TNFα induced necroptosis. Concurrent exposure to fructose and ethanol induces the over-expression of mitoneet. Mitoneet is a 2Fe-2S containing protein localized to the outer mitochondrial membrane. The increased expression of mitoneet primes the hepatocyte for TNFα induced cytotoxicity. Treatment with TNFα induces the translocation of a Stat3-Grim-19 complex to the mitochondria that binds to mitoneet and promotes the rapid release of it's 2Fe-2S cluster causing an accumulation of mitochondrial iron. The dramatic increase of mitochondrial iron provokes a surge of reactive oxygen species formation resulting in mitochondrial injury and cell death. Additionally, mitoneet is constitutively expressed at high levels in L929 fibrosarcoma cells and is required for L929 cells to undergo TNFα induced necroptosis in the presence of caspase inhibition, indicating the importance of mitoneet to the necroptotic form of cell death.
Electroporation of Adherent Cells by Direct Lamination of Hydrogel-based Microelectrode Substrates
Authors: Takahashi Daisuke , Sasaki Masato , Nagamine Kuniaki , Torimitsu Keiichi , Nishizawa Matsuhiko
Published: December 2013

We have developed a technique to fabricate Au microelectrodes on hydrogel substrates such as polyacrylamide. Electropolymerization of poly(3,4-ethylenedioxythiophene) (PEDOT) anchors the Au electrodes to the hydrogels. The resulting soft, molecularly permeable hydrogel-based microelectrodes were effective for the electroporation of adherent cells by direct lamination. The electroporation-assisted uptakes of dye molecules and genes were demonstrated for normal human dermal fibroblast cells and human induced pluripotent stem (iPS) cells.
Tissue-specific gene silencing monitored in circulating RNA
Authors: Sehgal Alfica , Chen Qingmin , Gibbings Derrick , Sah Dinah W.Y. , Bumcrot David
Published: December 2013

Pharmacologic target gene modulation is the primary objective for RNA antagonist strategies and gene therapy. Here we show that mRNAs encoding tissue-specific gene transcripts can be detected in biological fluids and that RNAi-mediated target gene silencing in the liver and brain results in quantitative reductions in serum and cerebrospinal fluid mRNA levels, respectively. Further, administration of an anti-miRNA oligonucleotide resulted in decreased levels of the miRNA in circulation. Moreover, ectopic expression of an adenoviral transgene in the liver was quantified based on measurement of serum mRNA levels. This noninvasive method for monitoring tissue-specific RNA modulation could greatly advance the clinical development of RNA-based therapeutics.
Emoções de uma mãe de primeira viagem
Authors: Luchesi Juliana Raquel de Souza , Machado Rosimeri , De Toni Deonir
Published: December 2013

O caso narra o nascimento de Miguel, o bebê de Luana e Eduardo. A partir das emoções de Luana, discute sua percepção de qualidade dos serviços do hospital.DOI: 10.12660/gvcasosv3n2c8http://dx.doi.org/10.12660/gvcasosv3n2c8
Uma tal de NI047 (Notas de ensino)
Authors: De Abreu Sergio Ricardo C. , De Araujo Maria Valeria Pereira , De Araújo Afranio Galdino
Published: December 2013

DOI: 10.12660/gvcasosv3n2n9http://dx.doi.org/10.12660/gvcasosv3n2n9
Segmentation of Ohio's Logging Industry Based on Productivity and Cost Variables
Authors: McConnell T. Eric
Published: December 2013

The objective of this research was to develop baseline information regarding the structure and performance of Ohio's logging industry. Questionnaires were distributed on-site at logger chapter meetings across the state. Multivariate clustering was used to group similar types of firms based on responses to 15 productivity and cost variables. Three clusters were identified: Local Mill Suppliers, Product Merchandisers, and Volume-Dependent Producers. The clusters were largely homogeneous as far as the overall makeup and administration of their companies. Clusters did differ regarding haul distance, pieces of equipment owned, and equipment age. Volume-Dependent Producers, while not significantly larger in size statistically, viewed the productivity, present, and future cost variables more pessimistically than the other clusters. The key variable of concern across clusters was the cost of consumables, primarily fuel, paralleling more recent findings in other states.
Hardwood Supply Chain and the Role of Log Brokers in 2012
Authors: Montague Iris , Andersch Adrienn , Wiedenbeck Jan , Buehlmann Urs
Published: December 2013

The recent economic crisis has greatly affected how companies conduct business. To be competitive, companies had to make changes to their product lines, distribution channels, marketing, and overall business strategies. This study was conducted to describe and analyze the log supply component of the hardwood forest products distribution chain and to investigate changes over the past 5 years. State forestry utilization and marketing specialists were interviewed to gain a regional overview of log distributions systems, followed by a survey that resulted in 57 responses from log distributors/brokers/wholesalers from 24 states. Results indicated that, on average, respondents received the majority of their logs from gatewood purchases, and the majority of logs purchased went directly into the sawmill market. From 2007 to 2011, logs sold to sawmill and veneer markets decreased by 6 and 7 percent, respectively, and logs sold to export markets increased by 30 percent. Respondents indicated that increasing fuel and trucking costs, followed by logger shortages, had the greatest negative impact on business operations. In contrast, increasing log exports had the greatest positive impact. Most respondents indicated that although current economic conditions have affected the way they conduct business, they have been able to find ways to adapt. Services such as providing log delivery, bucking logs to desired lengths, and procuring hard-to-obtain species helped companies in the log business remain competitive.
Primary and Secondary Hepatic Lymphomas Diagnosed by Image-Guided Fine-Needle Aspiration
Authors: Swadley Matthew J. , Deliu Matea , Mosunjac Marina B. , Gunthel Clifford J. , Nguyen Minh Ly T. , Hanley Krisztina Z.
Published: December 2013

Objectives:

To explore the diagnosis of hematolymphoid malignancies of the liver (hepatic lymphoma [HeL]) by image-guided fine-needle aspiration (FNA), which can often be difficult due to a low index of suspicion and nonspecific patient presentations, especially in the rare cases where the liver is the only site of disease (primary HeL [PHeL]). Understanding the clinical setting in which such lesions arise, as well as the cytomorphologic findings, may assist cytopathologists in making an accurate diagnosis and triaging samples for ancillary studies.

Methods:

In this retrospective study of 32 patients with HeL, the largest such study to our knowledge, we review the clinical and diagnostic features of HeL.

Results:

HeL and especially PHeL most commonly show a diffuse large B-cell lymphoma phenotype and have a poor prognosis (median survival of seven months). PHeL is strongly associated with human immunodeficiency virus infection (12/16 patients).

Conclusions:

Image-guided FNA with immediate evaluation is a reliable means to obtain diagnostic material and triage for ancillary tests.
El terremoto chileno del 27 de febrero de 2010: análisis preliminar de las consecuencias en la ciudad de Valdivia
Authors: Rojas Hoppe Carlos , Díez Lorente Silvia
Published: December 2013

El mayor sismo que haya afectado a la ciudad de Valdivia con posterioridad al famoso terremoto de 1960 fue el generado por el evento (Mw 8,8) del 27 de febrero de 2010 en la zona central de Chile. La intensidad asignada para la ciudad de Valdivia alcanzó el valor VI en la escala de Mercalli. Con el objeto de comprender la distribución espacial de los daños a la infraestructura urbana, se relacionó ésta con las condiciones locales de suelo. Los antecedentes de la historia sísmica y del desarrollo urbano de Valdivia proporcionan información valiosa que se agregó al análisis. La diferente severidad con la que el sismo repercutió en los diversos barrios de Valdivia, guarda una estrecha relación con las unidades geomorfológicas y los tipos de suelos de fundación existentes en la ciudad. Se pudo establecer una buena coincidencia con la respuesta sísmica de los suelos prevista para la ciudad en estudios previos.
GÓMEZ ESPÍN, J. Mª. y HERVÁS AVILÉS, R. Mª. (coords.) (2012): Patrimonio hidráulico y cultura del agua en el Mediterráneo. Murcia. Fundación Séneca. Regional Campus of Excellence “Campus Mare Nostrum”. Agencia Española de Cooperación Internacional para el Desarrollo, 287 p.
Authors: Morote Seguido Álvaro Francisco
Published: December 2013

El patrimonio hidráulico y la cultura del agua son unos de los temas de estudio que más se ha investigado en la región mediterránea y en concreto, en el sureste peninsular, dadas las condiciones geográficas como, escasez de precipitaciones, ausencia de aguas superficiales permanentes durante todo el año, etc., que han condicionado que los pueblos que han habitado esta área a lo largo de la historia hayan configurado una sociedad y unos paisajes influenciados por este bien escaso. Para estas sociedades el agua es un elemento de vida que ha caracterizado tanto la ribera mediterránea española como la norteafricana, siendo el mar Mediterráneo un puente de culturas e influencias que han ayudado a propagar diferentes sistemas hidráulicos para poder aprovechar el agua para abastecimiento y regadío. Los estudios sobre estas temáticas se han centrado principalmente en actuaciones con objeto de hacer frente a dos de los problemas asociados a las condiciones climáticas del sureste peninsular como, las sequías e inundaciones. En la actualidad, aunque gran parte del patrimonio hidráulico ha perdido su funcionalidad, tiene un enorme interés desde el punto de vista técnico y patrimonial, pues presenta sistemas de gran relevancia como, por ejemplo, las infraestructuras utilizadas para trasvases de caudales entre diferentes cuencas, donde cobra el agua un protagonismo especial ya que es necesaria para el abastecimiento y desarrollo territorial de dos sectores económicos vitales en el sureste peninsular como son, la actividad turística y la agricultura intensiva.
Exam Preparation: The Influence of Action Control, Procrastination and Examination Experience on Students’ Goal Intention and Implementation Intention
Authors: Sommer Lutz
Published: December 2013

Introduction. In the framework of the intention-behavior-gap analysis in relation to exam preparation I examined whether intention – subdivided into goal and implementation intention – is influenced directly by the determinants action control, procrastination and examination experience which is inconsistent with the Theory of Planned Behavior and whether their influence varies in its intensity.Method. Basis for the research was a survey (N=204) which investigated university students’ (research participants) exam revision. In 2010, 1,149 German engineering students with an average age of 22.5 years received written questionnaires. 204 students were included in the overall evaluation. I used a structural equation modeling path analysis method to examine the possible relations between the above mentioned variables.Results. The results show that the determinant examination experience has a significant and substantial influence on implementation intention, whereas goal intention hasn’t. This influence is also relevant with regard to the determinant procrastination.Discussion. Based on the results, that examination experience influences students´exam revision more than expected by the Theory of Planned Behavior model. I concluded that more examination experience could be an opportunity to reduce the intention-behavior-gap. Furthermore, it could be stated that the development of implementation intention is promoted by goal intention and examination experience. A unilateral focus on goal intention is not reason-able. Examination experience can have a positive impact on procrastination behavior. In addition, it could be stated, that a lack or lower level of methodological skills or examination experience can be decisive for study success. With regard to the determinant action control no influence was detected.
Pre-Service Teacher Knowledge of Behavior Function: Implications within the Classroom
Authors: Youngblom Rachel , Filter Kevin
Published: December 2013

Introduction. Many teachers lack the skills to effectively deal with behavioral issues when they arise and may not be familiar with behavioral techniques to utilize with students who have behavioral disabilities. The aim of the present study is to understand the extent to which pre-service teachers adequately understand functions of behavior and behavioral principles related to classroom behavior management.Method. Participants included pre-service students who were currently enrolled in an under-graduate university-based educational licensure program. The researcher videotaped three short 4-minute vignettes that displayed adult actors portraying a variety of behaviors. A questionnaire was formulated and given to the participants of the research study that asked them to determine the type of reinforcement being displayed in the vignette as well as to determine the specific function of the behavior in a multiple choice format. Additional background in-formation was gathered from each participant.Results. Results indicate that pre-service teachers vary in their ability to correctly identify behavior function after viewing video demonstrations of behaviors and that they were even less successful in correctly labeling behavior scenarios as being demonstrations of positive reinforcement, negative reinforcement, or punishment. No variables were identified that predicted participants’ accuracy in determining behavior function.Discussion and Conclusion: These findings support the notion that many pre-service teachers lack a sufficient level of knowledge of behavior function in order to accurately identify the nature of the problem and provide differentiated behavior supports.
Attributional style of children with and without Specific Learning Disability
Authors: Pasta Tiziana , Mendola Manuela , Longobardi Claudio , Prino Laura Elvira , Gastaldi Francesca Giovanna Maria
Published: December 2013

Introduction. The literature highlights that pupils with Specific Learning Disability (SLD) often reveal a poor meta-cognitive system, with low levels of attribution to internal factors like diligence and personal skills, and high levels of attribution to external factors like ease of task, luck or help from others.Method. This study aims to analyze the attributions expressed in the school context by pupils diagnosed with Specific Learning Disability (N=38; Age in months: Mean=100.24; SD=5.828) and to compare them with those by children without learning disabilities (N=70; 38 of them with the same academic achievements as the pupils with SLD, and 32 with opposite achievement levels). The instruments are the Attribution Test 4-10 years, nationally validated learning tests and the Student-Teacher Relationship Scale.Results. The analysis shows that just the pupils with SLD do not have an attributive style of the “strategic effort” kind, and, among them, the children that obtain the best scores in the nationally validated learning tests are the ones who least often, especially in cases of success, choose the ability factor and most often choose luck as the cause. Considering the teachers’ perceptions of the relationship between the pupils in the sample, the most significant score is related to Dependency: children with SLD are perceived far more dependent than their mates without SLD.Discussion and Conclusion. Results show that SLD do not cause a disadaptive attributive style but it causes an higher level of Dependency on the teacher; these children, in fact, do not have such a strong, stable attributive style with internal locus, and are inclined to attribute their results also to factors outside their own person. As a result, they seem not aware of their potential and search help even when it is not necessary.
Gender and Achievement Differences in Secondary Students’ Verbal Self-Concepts: A Closer Look beyond Bivariate Comparison
Authors: Faber Günter
Published: December 2013

Introduction. Against the background of contradictory research findings in the field the present study aimed at unraveling the structural complexities of gender differences in secondary students’ verbal self-concepts and, thus, analyzing possible gender × achievement interaction effects in the L1 German and L2 English language subject. According to an internal distress perspective significantly depressed self-concept scores for the female learners, in particular, at the low achievement level were assumed.Method. Data were gathered in a sample of 256 ninth grade students from German inner-city grammar schools. For measuring students’ L1 and L2 self-concept two subject-specific scales were administered. For measuring their achievement in each language subject teacher competence ratings as well as (self-reported) marks were used.Results. With respect to the L1 German language subject, only a significant main effect of the achievement variable was found. Neither a gender effect nor an achievement × gender interaction could be demonstrated. Therefore, interindividually existing self-concept differences in favor of the female learners appeared to largely reflect their better achievement in the native language subject. With respect to the L2 language subject, likewise a significant main effect of the achievement variable but also a significant gender × achievement interaction effect occurred. Within the low achieving sub-group the female learners displayed substantially lower self-concept scores than their male counter-parts – at least concerning the latest mark criterion. Hence, they more strongly suffered from internal distress.Discussion. Especially, in the L2 English language subject a gender × achievement interaction effect could significantly explain differences in the learners’ self-concept. Consequently, these differences cannot merely ascribed to a gendered view of language subjects – which commonly favors the female learners. Gender stereotyping effects will operate in a more complex manner. In particular, they appear to affect the students’ self-concept not primarily as a matter of subject rather as a matter of cognitive-motivational processing in the case of individually cumulated failure experiences – thus evidently unfavoring the female learners. However, the findings considerably differed across both the L1 and the L2 language subject and, thus, still need further clarification.
Inventario de estrategias meta-cognitivas generales (IEMG) e Inventario de estrategias meta-cognitivas en integrales (IEMI)
Authors: Favieri Adriana Gladys
Published: December 2013

Introducción. Al hablar del conocimiento sobre el propio conocimiento, sobre cómo se percibe, se comprende, se aprende, se recuerda y se piensa, estamos hablando sobre meta-cognición. La misma es considerada un aspecto decisivo en el desarrollo del pensamiento reflexivo, el aprendizaje autónomo y la construcción del conocimiento. En la literatura pueden encontrarse varios instrumentos destinados a medir aspectos meta-cognitivos, sin embargo, no ha podido hallarse algún instrumento que estuviera relacionado con las estrategias meta-cognitivas en el área de matemática. Por lo que este estudio tiene por objetivo diseñar dos inventarios, uno sobre estrategias meta-cognitivas generales y otro sobre estrategias meta-cognitivas para integrales indefinidas a partir del inventario de conciencia meta-cognitiva de adultos.Método. El estudio se centró en la traducción al castellano del inventario de conciencia meta-cognitiva de adultos (MAI) y su adaptación a las estrategias meta-cognitivas generales y de integrales indefinidas para elaborar dos inventarios. Se realizaron análisis factoriales utilizan-do el programa SPSS para analizar la validez y confiabilidad de los mismos.Resultados. Los resultados obtenidos apoyan la validez y confiablidad de los inventarios elaborados a partir de las adaptaciones del inventario de conciencia meta-cognitiva de adultos (MAI).Discusión y Conclusión. Los inventarios elaborados, adaptados del MAI, llamados IEMG y IEMI, son válidos y confiables para medir estrategias meta-cognitivas generales y estrategias meta-cognitivas específicas de integrales indefinidas, respectivamente.
“Chromoseratops meiosus”
Authors: Eliyahu Dorit
Published: December 2013

I present an activity to help students make the connection between meiosis and genetic variation. The students model meiosis in the first phase of the activity, and by that process they produce gametes of a fictitious reptilobird species, “Chromoseratops meiosus.” Later on, they will “mate” their gametes and produce a zygote and a resulting reptilobird. They will determine the phenotype of the resulting reptilobird and draw it. As they compare their reptilobirds, they will be able to see all the resulting variations and to discuss the sources of this variation. This activity can be easily used as a basis for sequel activities that will emphasize the implications of genetic variation on natural and sexual selection.
Investigations of TiO2 Nanoparticles Surface-Doped with Eu in Aqueous Fluids to High P-T Conditions
Authors: McCart Phillip A. , Farris Laurel , Mayanovic Robert A. , Yan Hao
Published: December 2013

A hydrothermal reactor has been used for surface doping of anatase TiO2 nanoparticles (∼ 13 nm across) with Eu3+ ions in aqueous fluids to 370 °C and ∼20 MPa. XRD and Raman measurements made both before and after hydrothermal treatment with Eu show that the anatase structure of the TiO2 nanoparticles (NPs) is preserved. SEM imaging, combined with XRD indicates that the size and overall morphology of the TiO2 nanoparticles is preserved subsequent to hydrothermal treatment in the presence of Eu. The photoluminescence occurring in the 400 to ∼700 nm range of the (as prepared) Eu surface-doped TiO2 NPs are red-shifted by ∼ 50 nm and reduced in intensity relative to the photoluminescence of TiO2 NPs.
The Optimization of InP/ZnS core/shell Nanocrystals and TiO2 Nanotubes for Quantum Dot Sensitized Solar Cells
Authors: Lee Seungyong , Eyi Rick , Khan Mahmood , Little Scott , Manasreh Omar
Published: December 2013

The synthesis of InP/ZnS core/shell nanocrystals and TiO2 nanotubes and the optimization study to couple them together were explored for quantum dot sensitized solar cells. InP/ZnS nanocrystals have advantages of tunable optical properties and intrinsic nontoxicity. Highly luminescent InP/ZnS nanocrystals were produced by precursor-based colloidal synthesis for a photosensitizer. In order to improve on air stability, ZnS shell was grown on InP core. The emission peak was observed at 550 nm. Transmission electron microscopy (TEM) image shows that the nanocrystals highly crystalline and monodisperse. TiO2 nanotube is main inorganic material which is capable of harvesting light as well as being a prominent anode electrode in solar cells. The nanotubular form of TiO2 enhances charge transfer and reduces interfacial charge recombination. Free-standing TiO2 nanotubes were produced by anodization using ammonium fluoride. The free-standing nanotubes were formed under the condition that chemical dissolution speed which depends on fluoride concentration was faster than the speed of Ti oxidation. Electrophoretic deposition was carried out to couple the InP/ZnS nanocrystals with the TiO2 nanotubes. Under an optimized applied voltage condition, the current during the electrophoretic deposition decreased continuously with time. The amount of the deposited nanocrystals was estimated by calculation and the deposited nanocrystals on the TiO2 nanotubes were observed in the TEM.
Ambipolar transport in MoS2 based electric double layer transistors
Authors: Ye Jianting , Zhang Yijin , Iwasa Yoshihiro
Published: December 2013

Making field effect transistors (FETs) on thin flake of single crystal isolated from layered materials was pioneered by the success of graphene. To overcome the difficulties of the zero band gap in graphene electronics, we report the fabrication of an electric double layer (EDL) transistor, a variant of FET, based on another layered material, MoS2. Using strong carrier tunability found in EDL coupled by ion movement, MoS2 transistor displayed an unambiguously ambipolar operation in addition to its commonly observed n-type transport. A high on/off ratio >104, large “ON” state conductivity of ∼mS, and a high reachable n2D ∼ 1×1014 cm-2 confirmed the high performance transistor operation being important for application. The high-density carriers of both holes and electrons can drive the MoS2 channel to metallic states indicating that new electronic phases could be accessed using the protocol established in making EDL gated transistors on layered materials.
Layered Nanostructures – Electronic and Mechanical Properties
Authors: Seifert Gotthard , Lorenz Tommy , Joswig Jan-Ole
Published: December 2013

In addition to graphene, 2D transition-metal chalcogenides as, e.g., MoS2 and WS2 nanostructures are promising materials for applications in electronics and mechanical engineering. Though the structure of these materials causes a highly inert surface with a low defect concentration, defects and edge effects can strongly influence the properties of these nanostructured materials. Therefore, a basic understanding of the interplay between electronic and mechanical properties and the influence of defects, edge states and doping is needed. We demonstrate on the basis of atomistic quantum-chemical simulations of a circular MoS2 platelet, how the mechanical deformation can vary the electronic properties and other device characteristics of such a system.
Electron microscopic characterization of multi-layer boron nitride nanosheets
Authors: Sajjad Muhammad , Feng Peter
Published: December 2013

We report on the direct synthesis of multi-layer boron nitride nanosheets (BNNSs) and their electron microscopic characterization. The synthesis process is carried out by irradiating hexagonal boron nitride (h-BN) target using short laser pulses. Scanning electron microscopy showed large area (≈50×50 μm2) flat layers of BNNSs transparent to the electron beam. Low magnification transmission electron microscope (TEM) is used to characterize different areas of nanosheets. TEM revealed that each individual nanosheet is composed of several layers. High resolution TEM (HRTEM) measurements confirmed the layered structure. HRTEM analysis of the edge of a nanosheet showed 10 layers from which we obtained the thickness (3.3nm) of an individual nanosheet. Selected area electron diffraction pattern indicated polycrystalline structure of nanosheets. Raman spectroscopy clearly identified E2g vibrational mode related to h-BN.
Synthesis and Characteristics of the Zinc Effects on Eu3+ Doped (Zn,Ca)TiO3 Phosphors
Authors: Rudramadevi B. Hemalatha , Buddhudu S. , Bhatt Piyush
Published: December 2013

For the purpose of development of highly energy-efficient light sources, one needs to design highly efficient green, red and yellow phosphors, which are able to absorb excitation energy and generate emissions. In this contribution, we present our results on producing some efficient phosphors with improved luminescence properties. The effects of zinc on the zinc-doped CaTiO3:Eu3+ phosphors have been investigated by varying the zinc concentrations. X-ray powder diffraction (XRD) and Scanning electron microscopy (SEM) characterizations were studies for their structural and morphological analysis. The variation of zinc concentration influences the crystallinity and morphology of the phosphors. The luminescence spectra of (Zn,Ca)TiO3: Eu3+ have been measured. Eu3+: (Zn,Ca)TiO3 have shown five emission transitions of 5D0→7F 0,1,2,3 & 4 located at 580 nm,593nm 615 nm,655 and 704 respectively with excitation at λexci=398nm (7F0→5L6). Moreover, the emitting phosphor developed in this study can be very effectively excited at the wavelengths of 398 nm. The (Zn, Ca)TiO3:Eu3+ can be used as a complementary phosphor in there red region for the white LEDs.
Controlling Hysteresis of Metal-hydride Transformations in Epitaxial Thin Films
Authors: Boyerinas Brad M. , Bruck Hugh A. , Roytburd Alexander L.
Published: December 2013

Metal hydrides present a feasible means of energy storage and hydrogen sensing but have several performance criteria that must be addressed, including the hysteresis effect during hydrogen loading and unloading. We present the results of a theoretical and experimental study which demonstrates the possibility to control or eliminate hysteresis during metal-hydride transformation in epitaxial Pd thin films. Theoretical analysis predicts stabilization of two-phase metal-hydride state in film due to its elastic interaction with the substrate. It is shown, by atomic force and scanning electron microscopy, that transformation in 100nm thick epitaxial Pd films on Al2O3 substrate proceeds by the formation of transversely modulated two-phase nanostructure. Morphology and crystallographic orientation of the metal-hydride interface corresponds to the theoretically predicted characteristics of coherent phases.
Cobertura efectiva del manejo de la violencia contra mujeres en municipios Mexicanos: límites de la métrica
Authors: Viviescas-Vargas Diana P. , Idrovo Alvaro Javier , López-López Erika , Uicab-Pool Gloria , Herrera-Trujillo Mónica , Balam-Gómez Maricela , Hidalgo-Solórzano Elisa
Published: December 2013

El estudio estimó la cobertura efectiva de los servicios en salud de primer nivel de atención para el manejo de la violencia doméstica contra la mujer en tres municipios mexicanos. Se estimó la prevalencia y severidad de la violencia usando una escala validada, y la cobertura efectiva con la propuesta de Shengelia y colaboradores, con modificaciones. Se consideró atención con calidad cuando hubo sugerencia de hacer la denuncia a las autoridades. La utilización y calidad de la atención fue baja en los tres municipios analizados, siendo más frecuente la utilización cuando hubo violencia sexual o física. La cobertura efectiva en Guachochi, Jojutla y Tizimín fue de 29.41%, 16.67% y cero, respectivamente. El indicador de cobertura efectiva tiene dificultades para medir eventos y respuestas no se fundamentan en modelos biomédicos. Los hallazgos sugieren que el indicador puede ser mejorado al incorporar otras dimensiones de la calidad.
Medida do impacto da doença: validade de constructo de instrumento entre coronariopatas
Authors: Pedrosa Rafaela Batista dos Santos , Rodrigues Roberta Cunha Matheus , Padilha Kátia Melissa , Gallani Maria Cecília B.J. , Alexandre Neusa Maria Costa
Published: December 2013

Este estudo estimou a validade de constructo pelo teste de grupos conhecidos do Instrumento para Mensuração do Impacto da Doença no Cotidiano do Valvopata (IDCV) quanto a sinais e sintomas, função ventricular sistólica, fração de ejeção do ventrículo esquerdo (FEVE) e qualidade de vida relacionada à saúde (QVRS) em 153 coronariopatas em seguimento ambulatorial. Os dados foram obtidos pela aplicação do IDCV e das versões brasileiras do The Medical Study 36-item Short Form Health Survey – SF-36 e MacNew Heart Disease Health-related Quality of Life Questionnair e. Foi utilizado o teste de Mann-Whitney para verificar a capacidade do IDCV em discriminar o impacto quanto a sinais e sintomas, FEVE e disfunção sistólica ventricular, bem como o teste de Kruskal-Wallis para verificar seu poder de discriminação em relação à QVRS. Constatou-se que o IDCV discriminou o impacto entre aqueles que pontuaram nos quartis (≤Q1, Q1-Q3, ≥Q3) de QVRS. Os achados deste estudo contribuem para o refinamento do IDCV na mensuração do impacto da doença entre coronariopatas.
Associação entre sintomas de insônia e artrite reumatóide em idosos
Authors: Freitas Denise Cuoghi de Carvalho Veríssimo , Schlosser Thalyta Cristina Mansano , Santos Ariene Angelini dos , Neri Anita Liberalesso , Ceolim Maria Filomena
Published: December 2013

Esse estudo objetivou avaliar sintomas de insônia em idosos residentes na comunidade e sua associação com a artrite reumatóide. Estudo descritivo, de corte transversal, recorte do projeto multicêntrico Fragilidade em Idosos Brasileiros . Foram avaliados 689 idosos (68,9% mulheres, média de idade 72,2 anos) utilizando-se questionário sociodemográfico e sobre condições clínicas, questões sobre sintomas de insônia (Perfil de Saúde de Nottingham) e teste de rastreio para alterações cognitivas (Mini-exame do Estado Mental). Utilizou-se análise descritiva e análise de regressão logística múltipla, com nível de significância de 5%. A associação entre sintomas de insônia e artrite reumatóide manteve-se significativa na análise multivariada; outros fatores associados foram avaliação subjetiva da saúde muito ruim, não ser aposentado e apresentar depressão. Os profissionais da área da saúde devem investigar cuidadosamente a qualidade do sono noturno dos idosos acometidos por artrite reumatóide, dada sua elevada prevalência nessa população.
O cuidado a pessoas com HIV/aids na perspectiva de profissionais de saúde
Authors: Sousa Carla Sofia de Oliveira , Silva Alcione Leite da
Published: December 2013

Este estudo teve por objetivo compreender o cuidado as pessoas com HIV/aids, na perspectiva de profissionais de saúde, em Portugal. Foi desenvolvido através do método da história oral, de Thompson, com a participação de 22 profissionais de saúde. Os dados foram obtidos através de entrevista semiestruturada e analisados com base na perspectiva de coletânea de narrativas, propostas pelo autor com o apoio do programa QSR NVivo. Os aspectos éticos foram obedecidos ao longo do estudo. O cuidado foi agrupado em três dimensões: cognitiva, afetiva-relacional e técnico-instrumental. A dimensão cognitiva destacou-se no período da revelação do diagnóstico de HIV/aids e ao longo da evolução da doença. A dimensão afetivo-relacional foi transversal e valorizada em todo o processo, desde o diagnóstico até à morte das pessoas com HIV/aids. A dimensão técnico-instrumental foi mais expressiva na fase mais avançada da doença, em situação de dependência e de terminalidade. Diante do exposto, podemos concluir que estas três dimensões são fundamentais para o cuidado à pessoa com HIV/aids.
Jogo educativo sobre drogas para cegos: construção e avaliação
Authors: Mariano Monaliza Ribeiro , Rebouças Cristiana Brasil de Almeida , Pagliuca Lorita Marlena Freitag
Published: December 2013

Estudo realizado com o objetivo de construir e avaliar um jogo educativo sobre drogas psicoativas acessível a pessoas cegas, desenvolvido em três etapas: construção do jogo educativo, avaliação por três especialistas em educação especial e doze cegos. Foi construído um jogo de tabuleiro denominado Drogas: jogando limpo . Na Versão Alfa os especialistas fizeram sugestões em relação às e instruções e ao tabuleiro: textura das casas, peças do jogo e escrita em Braille. Na Versão Beta, procedeu-se à avaliação pelos cegos, os quais sugeriram alterações na textura das casas e colocação de velcro para fixação do pino no tabuleiro. Passou-se, então, à Versão Gama, jogada pelas últimas três duplas de cegos e considerada adequada. Na avaliação dos juízes, o jogo revelou-se adequado, pois permite o acesso à informação sobre drogas psicoativas de maneira lúdica.
Proposta de reconhecimento de padrão de conforto em clientes com pênfigo vulgar utilizando a Lógica Fuzzy
Authors: Brandão Euzeli da Silva , Santos Iraci dos , Lanzillotti Regina Serrão , Moreira Júnior Augusto
Published: December 2013

Propuesta de reconocimiento del estándar de comodidad en clientes con pénfigo vulgar utilizando la Lógica FuzzyO objetivo é propor a Lógica Fuzzy para reconhecimento de padrões de conforto de pessoas submetidas a uma tecnologia de cuidar em Enfermagem por apresentarem pênfigo vulgar, uma doença cutâneo-mucosa rara que acomete principalmente adultos. A proposta aplicável em métodos experimentais com sujeitos submetidos à comparação quali-quantitativa (taxonomia/pertinência) do padrão de conforto antes e depois da intervenção. Requer o registro em escala cromática correspondente à intensidade de cada atributo: dor; mobilidade e comprometimento da autoimagem. As regras Fuzzy estabelecidas pela máquina de inferência definem o padrão de conforto em desconforto máximo, mediano e mínimo, traduzindo a eficácia dos cuidados de Enfermagem. Apesar de pouco utilizada na área de Enfermagem, essa lógica viabiliza pesquisas sem dimensionamento a priori do número de sujeitos em função da estimação de parâmetros populacionais. Espera-se avaliação do padrão de conforto do cliente com pênfigo diante da tecnologia aplicada de forma personalizada, conduzindo a avaliação global.
Representações sociais de enfermeiros acerca do estresse laboral em um serviço de urgência
Authors: Oliveira Joana D’Arc de Souza , Achieri João Carlos , Pessoa Júnior João Mário , Miranda Francisco Arnoldo Nunes de , Almeida Maria das Graças
Published: December 2013

Neste estudo objetivou-se apreender as representações de enfermeiros sobre o seu trabalho em serviço de urgência e sua relação com o estresse. Trata-se de um estudo exploratório descritivo e de abordagem qualitativa. Utilizou-se a Teoria das Representações Sociais. O cenário da pesquisa foi um hospital público de referência em urgência do município de Natal/RN. A amostra foi composta por dez enfermeiros. Para a análise dos dados, utilizou-se a técnica de análise do conteúdo. Os resultados apontam a relação das representações sociais do trabalho com o estresse dos enfermeiros, como um fenômeno complexo e multifacetado, contributivo de doenças e desgaste físico, emocional e mental.
Maternal mortality from hemorrhage in the State of Santa Catarina, Brazil
Authors: Martins Haimee Emerich Lentz , Souza Maria de Lourdes de , Arzuaga-Salazar Maria Angelica
Published: December 2013

Hemorrhage represents a set of causes that focuses on women during the pregnancy and puerperal period, and that, with improper attention, results in death. The authors aimed to analyze maternal deaths related to hemorrhage that occurred in the state of Santa Catarina, Brazil. The data were obtained from the Mortality Information System and Live Births Information System from the Brazilian Ministry of Health. This was a descriptive study, in which 491 maternal deaths that occurred in the period 1997-2010 were analyzed. Of these, 61 were related to hemorrhage, corresponding to 12.42%; postpartum hemorrhage was the most prevalent cause, with 26 deaths, followed by placental abruption with 15, representing 67.21% of the cases. The maternal mortality from hemorrhage is a public health problem in the state of Santa Catarina, due to its high prevalence and the fact that its underlying causes are preventable.
Improving patient safety: how and why incidences occur in nursing care
Authors: Toffoletto Maria Cecilia , Ruiz Ximena Ramirez
Published: December 2013

The present investigation was a cross-sectional, quantitative research study analyzing incidents associated with nursing care using a root-cause methodological analysis. The study was conducted in a public hospital intensive care unit (ICU) in Santiago de Chile and investigated 18 incidents related to nursing care that occurred from January to March of 2012. The sample was composed of six cases involving medications and the self-removal of therapeutic devices. The contributing factors were related to the tasks and technology, the professional work team, the patients, and the environment. The analysis confirmed that the cases presented with similar contributing factors, thereby indicating that the vulnerable aspects of the system are primarily responsible for the incidence occurrence. We conclude that root-cause analysis facilitates the identification of these vulnerable points. Proactive management in system-error prevention is made possible by recommendations.
Usage analysis of the Nursing Activities Score in two Spanish ICUS
Authors: Carmona-Monge Francisco Javier , Uranga Ikerne Uria , Gomez Sonia Garcia , Herranz Cristina Quiros , Bengoetxea Maitane Bergaretxe , Unanue Goiatz Etxabe , Martin Alazne Iribarren , Hernando Maialen Echepetelecu , Saralegui Erika Badiola , Irazoqui Miren Auzmendi
Published: December 2013

The aim of this study was to analyze the discourse of health managers on aspects related to delay in tuberculosis diagnosis. This was a qualitative research study, conducted with 16 Family Health Unit managers. The empirical data were obtained through semi-structured interviews. The analysis was based on the theoretical framework of the French school of discourse analysis. According to the managers’ statements, the delay in tuberculosis diagnosis is related to patient and health service aspects. As for patient aspects, managers report fear, prejudice and lack of information as factors that may promote a delayed diagnosis. Regarding health service aspects, structural problems and lack of professional skills were reported. The discourse of managers should be considered to qualify tuberculosis control actions and to prevent delays in diagnosis.
Evaluation of SCC yield stress from L-box test using the dam break model
Authors: Chamani Mohammad R. , Hosseinpour M. , Mostofinejad D. , Esmaeilkhanian B.
Published: December 2013

In this study, an analytical method for the dam break flow of non-Newtonian fluids is extended to model self-compacting concrete flow in the L-box test. The rheology of fresh self-compacting concrete is expressed by a Bingham model. To simplify the mathematical formulation, inertia forces and the effect of rebar are neglected and the fluid is assumed to be homogeneous. Several self-compacting concrete mixtures with different yield stresses are also tested to measure the L-box blocking ratio. The proposed model arrested profiles satisfactorily coincide with the experimental results. A relation between yield stress and the L-box blocking ratio is also derived. A comparison between the predicted values of yield stress and the experimental results shows that the proposed model successfully evaluates the yield stress of the tested samples. Moreover, it is observed that the proposed model is valid in the case of an L-box with rebar. Finally, a plot of the relative yield stress against L-box blocking ratio is presented that can be practically used for workability design of self-compacting concrete.
Integrated water management for municipalities in South Africa
Authors: (Kobus) du Plessis J A
Published: December 2013

South Africa is facing serious water shortages within the next 25 years and effective water demand management forms an integrated part of the possible solution. Municipalities are responsible for the majority of the water supply functions in South Africa, but they are challenged by limited funding opportunities and a lack of capacity. Water demand management projects in municipalities focus mainly on solving the water supply shortfall instead of implementing solutions as part of an integrated water resource strategy. The main objective of the research was to develop a model to guide the municipalities through the decision-making process to manage their water situation in a more sustainable and integrated manner. The model is supported by the development of an implementation and effective public participation process. The model also makes provision for six decision support systems, one for each step of the integrated water cycle (i.e. water resources, water treatment, distribution, consumer demand, waste water treatment and institutional aspects). The role and responsibility of political decision-making is also highlighted. The model is supported by a score card system, which enable a municipality to assess its performance or readiness to implement water demand management in an integrated and sustainable manner.
Successful High Pressure Abrasive Jetting Selective Stimulation of Oil Producer Wells with High Water Cut
Authors: Ahmed Danish , Burov Anton , Baez Fernando , Srivastava Abhiroop
Published: December 2013

Drilling carbonate oil wells may encounter fluid losses, hence specific mud systems have been designed with loss control materials to stop losses and to reduce the risk of drill pipe stuck. Unfavorably, mud systems with loss control materials create near wellbore damage that lead to uneconomic hydrocarbons production.

To overcome this challenge and revive wells back to the optimal production, matrix stimulation is carried out using coiled tubing with predetermined pumping schedule, where acid is injected into oil zones and diverter is squeezed into the high water cut (WC) zones.

Thus prior to stimulation, diagnostic logs are usually constructed via well logging to identify water producing intervals. However, in some cases the post-stimulation WC is equal to or higher than WC prior the stimulation, suggesting that the diverter placement was not effective in sealing the water zone.

Innovative methods had to be brought in to confirm the isolation of high WC zones before pumping acid and to reduce the risk of stimulating water producing zones. The method discussed here also includes the use of high pressure abrasive jetting tool to bypass the near wellbore damage and increase acid stimulation efficiency.

This case history describes an open hole vertical oil well in which the operator was able to reduce the risks of acidizing high WC interval through the innovative use of Fiber Optic Enabled CT string (FOECT) and Fiber Optic Enabled Bottom Hole Assembly (FOEBHA) with pressure and temperature sensors for real-time downhole measurements. Distributed Temperature Surveys (DTS) traces were recorded with fiber optic cable inside CT to modify and evaluate fluid placement.

The combination of high pressure abrasive jetting tool for selective stimulation technique, together with FOECT, FOEBHA and DTS, allowed stimulation treatment with maximized efficiency and fluids placement control. The acid was confirmed to have been stimulated only in the upper oil zone. As a result, the well production increased significantly without any increase in water cut.