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Search Results: 1 - 10 of 576 matches for " Ira Neitzel "
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SUFFICIENT OPTIMALITY CONDITIONS FOR THE MOREAU-YOSIDA TYPE REGULARIZATION CONCEPT APPLIED TO SEMILINEAR ELLIPTIC OPTIMAL CONTROL PROBLEMS WITH POINTWISE STATE CONSTRAINTS
Klaus Krumbiegel,Ira Neitzel,Arnd R?sch
Mathematics and its Applications : Annals of the Academy of Romanian Scientists , 2011,
Abstract: We develop sufficient optimality conditions for a Moreau-Yosidaregularized optimal control problem governed by a semilinear ellipticPDE with pointwise constraints on the state and the control. We makeuse of the equivalence of a setting of Moreau-Yosida regularization to a special setting of the virtual control concept,for which standard second order sufficient conditions have been shown. Moreover, we present a numerical example,solving a Moreau-Yosida regularized model problem with an SQP method.
Investigando o processo de leitura por meio de ambientes colaborativos Investigating the Reading Process by Means of Collaborative Environment
Adair de Aguiar Neitzel,Luiz Carlos Neitzel
Comunicar , 2009, DOI: doi:10.3916/c33-2009-03-004
Abstract: Investigaciones brasile as acerca de los factores determinantes para el éxito de programas de formación de lectores se alan la necesidad del empleo de la literatura como objeto estético para que el ni o se aproxime al libro. Esta investigación se propuso estudiar las concepciones de los profesores acerca de la literatura a partir del punto de vista del lector infantil. Se utilizó el chat como mecanismo de recolección de datos, propuesto entre dos clases de la ense anza fundamental, y entrevistas con las profesoras regentes. El análisis de los chats siguió la metodología de Franco (1997), evidenciando que los docentes no consideran al libro como un objeto estético que necesita ser disfrutado. Esta investigación se ala tres ejes básicos para la conquista de un público lector: a) recursos humanos calificados con claridad acerca de la concepción de literatura como fenómeno estético; b) procedimientos metodológicos coherentes con esa concepción; c) acervo bibliográfico ajustado a esa concepción. Brazilian research on the determining factors for the success of programs to teach reading indicates a need to view literature as an aesthetic object that will encourage children to appreciate books. This study proposes investigating teachers' concepts of literature, from the point of view of the children. Chat was used as a data collection mechanism, proposed between two groups of elementary school children and interviews with the teachers. The analysis of the chats followed the methodology of Franco (1997). This study indicates three key areas for winning a reading public: a) qualified human resources, with a clear concept of literature as an aesthetic phenomenon; b) methodological procedures that are coherent with this concept; c) a bibliographical archive that is aligned with this concept.
Long-Term Projections of Global Food Requirements: Why Were We Wrong?  [PDF]
Ira Sohn
Natural Resources (NR) , 2013, DOI: 10.4236/nr.2013.42026
Abstract:

This article reports on and analyzes long-term projections of world food requirements compared with observed 2000 data reported by the United Nations’ Food and Agriculture Organization. The importance of this “post-mortem” is to strengthen the case for carrying out long-term projections of essential resources—food, energy, and non-fuel minerals because of the long-lead times needed to insure that adequate global output levels of these basic ingredients of living standards will be met. This study should prove useful to those preparing today’s long-term projections, with world population projected to rise to over 9bn by mid-century.

Generation of Single, Monodisperse Compound Droplets
James Black,G. Paul Neitzel
Physics , 2010,
Abstract: The generation of single, monodisperse compound droplets is shown in these fluid dynamics videos. In an apparatus designed to produce single compound droplets, a piezoelectric diaphragm generates a pressure pulse from a voltage waveform input to eject a droplet. In the method presented, oil is allowed to flow into the water nozzle with the pressure pulse ejecting both fluids as a compound droplet. Experiments were performed to demonstrate how changes in water pressure affect compound droplet compositions. It was found that increasing the water pressure decreased the thickness of the compound droplet's oil layer.
Chromosomal Aberrations Associated with Clonal Evolution and Leukemic Transformation in Fanconi Anemia: Clinical and Biological Implications
Stefan Meyer,Heidemarie Neitzel,Holger T nnies
Anemia , 2012, DOI: 10.1155/2012/349837
Abstract: Fanconi anaemia (FA) is an inherited disease with congenital and developmental abnormalities, bone marrow failure, and extreme risk of leukemic transformation. Bone marrow surveillance is an important part of the clinical management of FA and often reveals cytogenetic aberrations. Here, we review bone marrow findings in FA and discuss the clinical and biological implications of chromosomal aberrations associated with leukemic transformation.
QF-PCR as a molecular-based method for autosomal aneuploidies detection  [PDF]
Reham Moftah, Salah Marzouk, Dalal El-Kaffash, Raymonda Varon, Christiane Bommer, Mohsen Karbasiyan, Heidemarie Neitzel
Advances in Reproductive Sciences (ARSci) , 2013, DOI: 10.4236/arsci.2013.13004
Abstract: Objectives: The currently available methods for rapid prenatal diagnosis of common chromosomal aneuploidies are either Interphase-Fluorescence in Situ Hybridisation (I-FISH) or Quanti- tative Fluorescent Polymerase Chain Reaction (QF-PCR). QF-PCR represents a rapid, high throughput, cost-effective alternative for Interphase-FISH. The objective of the study was to evaluate the performance of QF-PCR, as a molecular-based technique for the detection of chromosome 21, 18 and 13 copy numbers. Study design: A retrospective cohort of 163 samples referred for screening of common chromosomal aneuploidies was blindly tested for chromosome 21, 18 and 13 copy numbers using QF-PCR and the results were compared with those of conventional cytogenetic analysis. Results: QF-PCR demonstrated optimal sensitivity and specificity (100%) for non mosaic trisomies. QF-PCR was able to consistently detect maternal cell contamination and mosaic trisomies when the trisomic cell line was present at an adequate level (23% or more). However, QF-PCR was unable to detect chromosomal rearrangements for which the primers were not designed. Conclusion: QF- PCR proved its superior performance as a molecular-based method for autosomal aneuploidy detection concerning both sensitivity and specificity.
Chromosomal Aberrations Associated with Clonal Evolution and Leukemic Transformation in Fanconi Anemia: Clinical and Biological Implications
Stefan Meyer,Heidemarie Neitzel,Holger T?nnies
Anemia , 2012, DOI: 10.1155/2012/349837
Abstract: Fanconi anaemia (FA) is an inherited disease with congenital and developmental abnormalities, bone marrow failure, and extreme risk of leukemic transformation. Bone marrow surveillance is an important part of the clinical management of FA and often reveals cytogenetic aberrations. Here, we review bone marrow findings in FA and discuss the clinical and biological implications of chromosomal aberrations associated with leukemic transformation. 1. Introduction Fanconi anemia (FA) is an inherited disease with bone marrow failure, variable congenital and developmental abnormalities, and extreme cancer predisposition. The most common malignancies in FA are myeloid leukemia and squamous cell carcinoma. On a cellular level, FA is characterized by chromosomal instability and cross-linker sensitivity, which is the diagnostic hallmark of FA. For diagnostic testing, this is determined by demonstration of hypersensitivity to mitomycin C (MMC) or diepoxybutane (DEB) of patient derived peripheral blood cells or fibroblasts [1–3]. FA cells also display hypersensitivity to proapoptotic stimuli of certain cytokines, such as TNF-α and IFN-γ, which has been implicated in haematological manifestations of FA [4–6]. Cell cycle analysis of FA cells shows a characteristic arrest in the G2 phase, which is exacerbated by exposure to MMC [7–9]. This clinical and cellular phenotype results from a defect in a DNA damage response (DDR) pathway (FA/BRCA pathway), in which FA and associated proteins interact. So far, 15 FA genes (FANCA, FANCB, FANCC, FANCD1/BRCA2, FANCD2, FANCE, FANCF, FANCG, FANCI, FANCJ, FANCL, FANCM, FANCN/PALPB2, FANCO/RAD51C, and FANCP/SLX4) have been identified that can be mutated in FA [2, 10–12], of which FANCA, FANCG, and FANCC are the most commonly mutated genes in studied FA populations [2]. Importantly, the discovery that mutations in BRCA2 causes FA in the subgroup FA-D1, which comprises less than 5% of all FA patients, linked the FA DNA damage response pathway to hereditary breast and ovarian cancer (HBOC) [13, 14]. Hematopoiesis in the bone marrow (BM) is the most commonly affected organ system in FA, and most FA patients will develop clinically relevant hematological complications in their first or second decades of life [15]. BM complications of FA can manifest with hypoplasia, often initially being limited to thrombocytopenia in peripheral blood counts, or general aplasia. When the diagnosis of FA is made, which might happen with considerable delay, bone marrow appearances can already be more advanced and consistent with myelodysplasia. In FA, this
A leitura e a escrita do literário em meio eletr nico
Adair de Aguiar Neitzel,Taiza Mara Rauen Moraes,Luiz Carlos Neitzel,Elisangela Viana
Ciencia, Docencia y Tecnología , 2012,
Abstract: El artículo presenta los resultados de unade las etapas de la investigación titulada: Autores, obras e acervos literários catarinenses em meio digital, en colaboración con veintidós docentes del sistema educativo de Santa Catarina, Joinville (Brasil). El objetivo del proyecto fue indagar sobre los posibles usos en la clase de textospublicados en medios electrónicos, para ampliar las prácticas de lectura. La metodología seguida fue un curso dado a los docentes de Lengua y Literatura portuguesa de escuelas estatales de Joinville, estructurado en torno a la exploración de la biblioteca digital Nupill y el cd producido por el mismo grupo: “Relógio de Ouro –Machado de Assis”. En este artículo proponemos examinar algunas de las posibilidades pedagógicas de estos materiales y discutir algunas de las estrategias de ense anza empleadas por los docentes con sus estudiantes de escuela media, las que fueron estructuradas en tres ejes: lectura, investigación y producción.
Response of HIV-associated proteinuria to antiretroviral therapy in HIV-1-infected children
Shah, Ira;
Brazilian Journal of Infectious Diseases , 2006, DOI: 10.1590/S1413-86702006000600011
Abstract: hiv-associated nephropathy has been found in children with hiv-1 infection as a late manifestation of this disease; it is associated with nephrotic syndrome with focal segmental glomerulosclerosis and/or mesangial hyperplasia with microcystic tubular dilatation. this is quite rare in children and no cases have been reported from india. several mechanisms have been hypothesized for the hiv-induced renal damage. we report on two hiv-infected children with hiv-associated proteinuria and dramatic response to antiretroviral therapy.
Experimental empirical research in pedagogy. Theoretical reflections and methodological order Ricerca empirico-sperimentale in pedagogia… Alcuni appunti su riflessione teorica e sistematicità metodologica.
Ira Vannini
Ricerche di Pedagogia e Didattica , 2009,
Abstract: In this short essay we would like to trace the main phases through which an educational research is developed in order to reflect on some important questions for the researcher during a survey. In the last decades the national and international debate on this topic has been very heated and complex; this work doesn’t pretend to be exhaustive but it aims at delineating the most significant moment characterising a survey path and at underlining the value of researching in education as praxis – of though and action – demanding to be theoretically founded, on one side, and methodologically rigorous, on the other side. In this essay the quantitative approach will be privileged to highlight its peculiarities and importance in educational research; nevertheless this approach will be critically analysed and discussed in the light of the most recent reflections on the paradigms for social sciences research and the possibilities and limits of theoretical and methodological integration between quantitative and qualitative approaches. In questo breve saggio, si vogliono ripercorrere le fasi principali attraverso le quali si sviluppa un percorso di ricerca empirica e sperimentale in educazione, allo scopo di riflettere su alcune questioni importanti che si propongono al ricercatore durante il suo lavoro di indagine. Negli ultimi decenni, il dibattito nazionale e internazionale a questo proposito è stato molto vivace e complesso; la presente trattazione non pretende dunque di essere in alcun modo esaustiva, bensì mira a delineare i momenti più significativi che caratterizzano un itinerario di indagine e a sottolineare il valore del fare ricerca in educazione quale prassi – di pensiero e di azione – che esige di essere, da un lato, teoricamente fondata e, dall’altro lato, metodologicamente rigorosa. Nel saggio verrà prediletto l’approccio più propriamente sperimentale e quantitativo, al fine di evidenziarne le peculiarità e le valenze nell’ambito della ricerca empirica in pedagogia; tale approccio sarà tuttavia analizzato e discusso criticamente alla luce delle più recenti riflessioni sui paradigmi teorici della ricerca nelle scienze sociali e sulle possibilità e i limiti dell’integrazione, teorica e metodologica, tra approcci quantitativo e qualitativo.
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