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Sample records for iconographic essay tomografia

  1. Apendicite aguda: achados na tomografia computadorizada - ensaio iconográfico Acute appendicitis: computed tomography findings - an iconographic essay

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    Marcelo Eustáquio Montandon Júnior

    2007-06-01

    Full Text Available A apendicite aguda é a causa mais comum de dor abdominal aguda que requer intervenção cirúrgica no mundo ocidental. O diagnóstico precoce é essencial para minimizar a morbidade da doença. O uso dos métodos de imagem significou grande avanço no diagnóstico desta entidade, até então avaliada apenas com base na história clínica, exame físico e dados laboratoriais, haja vista que 20% a 33% dos pacientes apresentam sintomas atípicos. O diagnóstico é mais difícil nas crianças, nos idosos e nas mulheres em idade fértil. Os principais métodos de imagem para sua avaliação são a ultra-sonografia e a tomografia computadorizada. Os objetivos deste trabalho são: descrever a fisiopatologia da doença, comentar os principais aspectos técnicos da tomografia computadorizada, demonstrar e ilustrar os achados tomográficos e citar os principais diagnósticos diferenciais.Acute appendicitis is the most important cause of abdominal pain requiring surgical intervention in the Western world. The early diagnosis of this disease is of paramount relevance for minimizing its morbidity. Imaging methods have represented a huge progress in the diagnosis of this entity, which used to be based essentially on clinical history, physical examination and laboratory tests results, considering that 20% to 33% of patients present with atypical symptoms. Diagnostic difficulty is higher in children, the elderly, and women in childbearing age. The main imaging methods for evaluation of acute appendicitis are ultrasound and computed tomography. The present study is aimed at describing the disease physiopathology, commenting main computed tomography technical aspects, demonstrating and illustrating tomographic findings, and describing main differential diagnoses.

  2. Magnetic resonance imaging in lower urinary tract endometriosis: iconographic essay

    International Nuclear Information System (INIS)

    Lima, Claudio Marcio Amaral de Oliveira; Coutinho, Elisa Pompeu Dias; Ribeiro, Erica Barreiros; Domingues, Marisa Nassar Aidar; Junqueira, Flavia Pegado; Coutinho Junior, Antonio Carlos

    2009-01-01

    Endometriosis is defined as the presence of functional endometrial tissue outside the endometrial cavity and myometrium. Although this is a frequent disease with multifactorial causes, involvement of the lower urinary tract is rare. Magnetic resonance imaging is highly sensitive, specific and accurate in the diagnosis of endometriosis in the lower urinary tract, especially for allowing the identification of lesions obscured by adhesions or with subperitoneal extension. The present iconographic essay presents the main magnetic resonance imaging findings of the lower urinary tract involvement by endometriosis. (author)

  3. Sinais de uretelolitíase na tomografia computadorizada helicoidal sem contraste: ensaio iconográfico e revisão de literatura Ureterolithiasis signs on unenhanced helical computed tomography: iconographic essay and literature review

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    Renata La Rocca Vieira

    2004-12-01

    Full Text Available O principal sinal diagnóstico de ureterolitíase na tomografia computadorizada é a visualização direta do cálculo no interior do ureter. Todavia, a sua caracterização pode ser prejudicada devido a suas pequenas dimensões, variação da respiração entre a aquisição dos cortes tomográficos, escassez de gordura retroperitoneal ou eliminação recente do cálculo. Neste contexto, foram descritos diversos sinais secundários de obstrução ureteral, observados na tomografia computadorizada, que podem auxiliar no diagnóstico de casos duvidosos, além de quantificar o grau de obstrução urinária.The most important diagnostic sign of ureterolithiasis is the direct visualization of the stone within the ureter. However, in some patients with ureterolithiasis stone visualization may be impaired due to stone small size or low attenuation, respiratory artifacts between data acquisitions, low amount of retroperitoneal fat or recent elimination of the stone. In this context, we describe many secondary computed tomography signs of ureteral obstruction that may useful in the diagnosis of inconclusive cases, and also quantify the degree of urinary obstruction.

  4. High-resolution computed tomography findings in pulmonary complications after bone marrow transplantation: iconographic essay; Tomografia computadorizada de alta resolucao nas complicacoes pulmonares pos-transplante de medula ossea: ensaio iconografico

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    Gasparetto, Emerson L.; Ono, Sergio E.; Souza, Carolina A. [Parana Univ., Curitiba, PR (Brazil). Hospital de Clinicas. Servico de Radiologia Medica e Diagnostico por Imagem]. E-mail: gasparetto@hotmail.com; Escuissato, Dante L. [Parana Univ., Curitiba, PR (Brazil). Faculdade de Medicina. Disciplina de Radiologia Medica; Rocha, Gabriela de Melo; Inoue, Cezar; Falavigna, Joao M. [Parana Univ., Curitiba, PR (Brazil). Faculdade de Medicina; Marchiori, Edson [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia; Universidade Federal, Rio de Janeiro (UFRJ), RJ (Brazil). Curso de Pos-graduacao em Radiologia

    2005-12-01

    Bone marrow transplantation has been the treatment of choice for many hematologic diseases. However, pulmonary complications, which may occur in up to 60% of the patients, are the main cause of treatment failure and may be divided in three phases according to the patient's immunity. In the first phase, up to 30 days after the procedure, there is a predominance of non-infectious complications and fungal pneumonia. Viral infections, mainly by cytomegalovirus, are common in the second phase (up to 100 days after bone marrow transplantation). Finally, in the late phase after bone marrow transplantation, non-infectious complications as bronchiolitis obliterans organizing pneumonia and graft-versus-host disease are most commonly seen. The authors present a pictorial essay of the high-resolution computed tomography findings in patients with pulmonary complications after bone marrow transplantation. (author)

  5. Imaging evaluation of middle ear cholesteatoma: iconographic essay

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    Avila, Ana Flavia Assis de; Aburjeli, Bruna de Oliveira Melim; Moreira, Wanderval; Motta, Emilia Guerra Pinto Coelho; Ribeiro, Marcelo Almeida; Diniz, Renata Lopes Furletti Caldeira, E-mail: fauassis@hotmail.com [Hospital Mater Dei, Belo Horizonte, MG (Brazil)

    2013-06-15

    Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications. (author)

  6. Mucinous carcinoma of the breast: iconographic essay with histopathological correlation

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    Gustavo Nunes Medina Coeli

    2013-07-01

    Full Text Available The present essay is aimed at describing the most characteristic imaging findings of mucinous carcinoma of the breast, with emphasis on the patterns related to better prognosis. The authors selected cases of mucinous carcinoma of the breast whose images were available, highlighting the imaging findings suggestive of this subtype of breast cancer, either at mammography, ultrasonography or magnetic resonance imaging.

  7. Imaging evaluation of middle ear cholesteatoma: iconographic essay

    OpenAIRE

    Ávila,Ana Flávia Assis de; Aburjeli,Bruna de Oliveira Melim; Moreira,Wanderval; Motta,Emília Guerra Pinto Coelho; Ribeiro,Marcelo Almeida; Diniz,Renata Lopes Furletti Caldeira

    2013-01-01

    Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications.

  8. Imaging evaluation of middle ear cholesteatoma: iconographic essay

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    Ana Flavia Assis de Avila

    2013-07-01

    Full Text Available Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications.

  9. Imaging evaluation of middle ear cholesteatoma: iconographic essay

    OpenAIRE

    Ávila, Ana Flávia Assis de; Aburjeli, Bruna de Oliveira Melim; Moreira, Wanderval; Motta, Emília Guerra Pinto Coelho; Ribeiro, Marcelo Almeida; Diniz, Renata Lopes Furletti Caldeira

    2013-01-01

    Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications. O colesteatoma da orelha média é uma doença importante e relativamente comum, podendo ter sérias consequências. Neste e...

  10. Neuropathic osteoarthropathy: iconographic essay; Osteoartropatia neurotrofica: ensaio iconografico

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    Fernandes, Joao Luiz; Rocha, Arthemizio Antonio Lopes [Hospital Santa Lucia, Brasilia, DF (Brazil); Viana, Sergio Lopes [Clinica Radiologica Vila Rica, Brasilia DF (Brazil)]. E-mail: radiolog@uol.com.br

    2005-04-15

    Neuropathic osteoarthropathy is characterized by chronic, destructive and non-infectious bone and joint disease developing in patients with some level of loss of proprioception or pain insensitivity. Currently, diabetes mellitus is the most frequent cause of neuropathic osteoarthropathy. The classic appearance on X-rays is bone fragmentation, osteophytosis, joint effusion and joint instability, with preserved bone density. Although conventional X-rays is the most frequently used imaging modality for the evaluation of neuropathic osteoarthropathy and the role of the imaging methods are reviewed as a pictorial essay. (author)

  11. Tomografia computadorizada de alta resolução nas complicações pulmonares pós-transplante de medula óssea: ensaio iconográfico High-resolution computed tomography findings in pulmonary complications after bone marrow transplantation: iconographic essay

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    Emerson L. Gasparetto

    2005-12-01

    Full Text Available O transplante de medula óssea (TMO tem sido utilizado como tratamento de escolha para diversas doenças hematológicas. Entretanto, as complicações pulmonares, que podem ocorrer em até 60% dos pacientes, são o principal motivo de falha no tratamento. As complicações pulmonares pós-TMO podem ser divididas em três fases, de acordo com a imunidade do paciente. Na primeira fase, até 30 dias após o procedimento, predominam as complicações não infecciosas e as pneumonias fúngicas. Na fase precoce, que vai até o 100º dia pós-TMO, as infecções virais, principalmente por citomegalovírus, são mais comuns. Finalmente, na fase tardia pós-TMO, complicações não infecciosas como bronquiolite obliterante com pneumonia em organização e doença do enxerto contra o hospedeiro são mais comumente observadas. Os autores apresentam um ensaio iconográfico, enfatizando os aspectos de tomografia de alta resolução em pacientes com complicações pulmonares pós-TMO.Bone marrow transplantation has been the treatment of choice for many hematologic diseases. However, pulmonary complications, which may occur in up to 60% of the patients, are the main cause of treatment failure and may be divided in three phases according to the patient's immunity. In the first phase, up to 30 days after the procedure, there is a predominance of non-infectious complications and fungal pneumonia. Viral infections, mainly by cytomegalovirus, are common in the second phase (up to 100 days after bone marrow transplantation. Finally, in the late phase after bone marrow transplantation, non-infectious complications as bronchiolitis obliterans organizing pneumonia and graft-versus-host disease are most commonly seen. The authors present a pictorial essay of the high-resolution computed tomography findings in patients with pulmonary complications after bone marrow transplantation.

  12. Magnetic resonance imaging in lower urinary tract endometriosis: iconographic essay; Ressonancia magnetica na endometriose do trato urinario baixo: ensaio iconografico

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    Lima, Claudio Marcio Amaral de Oliveira; Coutinho, Elisa Pompeu Dias; Ribeiro, Erica Barreiros; Domingues, Marisa Nassar Aidar; Junqueira, Flavia Pegado; Coutinho Junior, Antonio Carlos [Clinicas de Diagnostico Por Imagem (CDPI) e Multi-Imagem, Rio de Janeiro, RJ (Brazil)], e-mail: cmaol@br.inter.net, e-mail: cmaolima@gmail.com

    2009-05-15

    Endometriosis is defined as the presence of functional endometrial tissue outside the endometrial cavity and myometrium. Although this is a frequent disease with multifactorial causes, involvement of the lower urinary tract is rare. Magnetic resonance imaging is highly sensitive, specific and accurate in the diagnosis of endometriosis in the lower urinary tract, especially for allowing the identification of lesions obscured by adhesions or with subperitoneal extension. The present iconographic essay presents the main magnetic resonance imaging findings of the lower urinary tract involvement by endometriosis. (author)

  13. Imaging findings of myocardial revascularization at multidetector computed tomography: where are the bypass grafts?: an iconographic essay

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    Ripari, Marcelo Targa; Santaniello, Rogerio; Sasdelli Neto, Roberto; Nomura, Cesar Higa; Chate, Rodrigo Caruso; Passos, Rodrigo Bastos Duarte; Kay, Fernando Uliana; Funari, Marcelo Buarque de Gusmao [Hospital Albert Einstein, Sao Paulo, SP (Brazil). Dept. of Imaging], e-mail: mtripari@uol.com

    2009-09-15

    Multidetector coronary computed tomography angiography is a precise method for evaluating post-coronary revascularization arterial and venous bypass grafts, and is somehow superseding coronary catheterization that is an invasive and more expensive technique. The present iconographic essay is aimed at anatomically demonstrating the bypass grafts most frequently utilized, how to differentiate between arterial and venous grafts and how to find them. The studies were performed in 64-row multidetector computed tomography equipment, with breath hold, controlled heart rate and appropriate protocols with later MPR, MIP and 3D reconstructions according to electrocardiogram. The localization of the bypass grafts and anastomoses at computed tomography studies focused on chest and coronary arteries may represent a difficulty in the images analysis by the radiologist who is not familiar with the matter, so the knowledge of the surgical techniques adopted and possible courses of the saphenous bypass grafts and arterial grafts can aid in the analysis of both studies, avoiding diagnostic errors. (author)

  14. Intraventricular mass lesions at magnetic resonance imaging: iconographic essay - part 2

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    Castro, Felipe Damasio de; Reis, Fabiano; Guerra, Jose Guilherme Giocondo, E-mail: fdamasiocastro@gmail.com [Universidade Estadual de Campinas (Unicamp), Campinas, SP (Brazil)

    2014-07-15

    The present essay is illustrated with magnetic resonance images obtained at the authors’ institution over the past 15 years and discusses the main imaging findings of intraventricular tumor-like lesions (colloid cyst, oligodendroglioma, astroblastoma, lipoma, cavernoma) and of inflammatory/infectious lesions (neurocysticercosis and an atypical presentation of neurohistoplasmosis). Such lesions represent a subgroup of intracranial lesions with unique characteristics and some imaging patterns that may facilitate the differential diagnosis. (author)

  15. Congenital anomalies of the inferior vena cava: importance of multiplanar imaging methods: an iconographic essay

    International Nuclear Information System (INIS)

    Viana, Sergio Lopes; Mendonca, Jose Luiz Furtado de; Freitas, Flavia Mendes Oliveira

    2006-01-01

    The inferior vena cava is the result of a complex embryologic process which takes place between 6 and 8 weeks of intra-uterine life. Several variations can occur during this process, and a defective embryogenesis of this vessel may lead to the development of anatomic variants. Although many of these variants are asymptomatic, the radiologist should be aware of them and of the potential medico-legal issues involved, especially in cases in which abdominal surgery or hemodynamic procedures are contemplated. In this paper, the major congenital anomalies involving the inferior vena cava are reviewed under the form of a pictorial essay, highlighting the role of the multiplanar imaging methods (volumetric computed tomography and magnetic resonance imaging) in their diagnosis. Keywords: Congenital variations; Inferior vena cava; Renal veins; Computed tomography; Magnetic resonance imaging. author)

  16. Ureterolithiasis signs on unenhanced helical computed tomography: iconographic essay and literature review; Sinais de ureterolitiase na tomografia computadorizada helicoidal sem contraste: ensaio iconografico e revisao da literatura

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    Vieira, Renata La Rocca; Faintuch, Salomao; Goldman, Suzan Menasce; Ajzen, Sergio Aron; Szejnfeld, Jacob [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: relarocca@uol.com.br

    2004-12-01

    The most important diagnostic sign of ureterolithiasis is the direct visualization of the stone within the ureter. However, in some patients with ureterolithiasis stone visualization may be impaired due to stone small size or low attenuation, respiratory artifacts between data acquisitions, low amount of retroperitoneal fat or recent elimination of the stone. In this context, we describe many secondary computed tomography signs of ureteral obstruction that may useful in the diagnosis of inconclusive cases, and also quantify the degree of urinary obstruction. (author)

  17. Congenital anomalies of the inferior vena cava: importance of multiplanar imaging methods: an iconographic essay; Anomalias congenitas da veia cava inferior: valor dos metodos multiplanares em seu diagnostico - ensaio iconografico

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    Viana, Sergio Lopes; Mendonca, Jose Luiz Furtado de; Freitas, Flavia Mendes Oliveira [Clinica Radiologica Vila Rica, Brasilia, DF (Brazil)] (and others). E-mail: radiolog@uol.com.br

    2006-10-15

    The inferior vena cava is the result of a complex embryologic process which takes place between 6 and 8 weeks of intra-uterine life. Several variations can occur during this process, and a defective embryogenesis of this vessel may lead to the development of anatomic variants. Although many of these variants are asymptomatic, the radiologist should be aware of them and of the potential medico-legal issues involved, especially in cases in which abdominal surgery or hemodynamic procedures are contemplated. In this paper, the major congenital anomalies involving the inferior vena cava are reviewed under the form of a pictorial essay, highlighting the role of the multiplanar imaging methods (volumetric computed tomography and magnetic resonance imaging) in their diagnosis. Keywords: Congenital variations; Inferior vena cava; Renal veins; Computed tomography; Magnetic resonance imaging. author)

  18. Síndrome do impacto do tornozelo na ressonância magnética: ensaio iconográfico Magnetic resonance imaging of ankle impingement syndrome: iconographic essay

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    Claudio Marcio Amaral de Oliveira Lima

    2010-02-01

    Full Text Available A síndrome do impacto do tornozelo é uma condição dolorosa causada por atrito de tecidos articulares, que é tanto causa quanto consequência de uma biomecânica alterada desta articulação. A sua principal causa são as lesões pós-traumáticas, principalmente lesões ligamentares, resultando em dor crônica no tornozelo. Do ponto de vista anatômico e clínico, estas síndromes são classificadas em: ântero-lateral, anterior, ântero-medial, póstero-medial e posterior. A ressonância magnética é um ótimo método diagnóstico para demonstrar as alterações ósseas e as partes moles dos vários tipos de impacto do tornozelo, fornecendo dados que auxiliam não só na comprovação desse diagnóstico, como na diferenciação com outras causas de dor articular. Os autores objetivam ilustrar os principais achados de ressonância magnética na síndrome do impacto do tornozelo.Ankle impingement syndrome is a painful condition resulting from friction of joint tissues that is both cause and effect of an altered joint biomechanics. The leading causes of such condition are post-traumatic lesions, particularly the ligamentous ones, resulting in chronic ankle pain. From an anatomic and clinical point of view, these syndromes may be classified as anterolateral, anterior, anteromedial, posteromedial, and posterior. Magnetic resonance imaging is an excellent diagnostic method for demonstrating bone and soft tissue abnormalities resulting from different types of ankle impingement, providing useful data to confirm the diagnosis as well as to rule out other possible causes of joint pain. The present essay is aimed at illustrating the main magnetic resonance imaging findings in ankle impingement syndrome.

  19. Magnetic resonance imaging in deep pelvic endometriosis: iconographic essay

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    Coutinho Junior, Antonio Carlos; Coutinho, Elisa Pompeu Dias; Lima, Claudio Marcio Amaral de Oliveira; Ribeiro, Erica Barreiros; Aidar, Marisa Nassar [Clinica de Diagnostico por Imagem (CDPI), Rio de Janeiro, RJ (Brazil); Clinica Multi-Imagem, Rio de Janeiro, RJ (Brazil); E-mail: cmaol@br.inter.net; Gasparetto, Emerson Leandro [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Dept. de Radiologia

    2008-03-15

    Endometriosis is characterized by the presence of normal endometrial tissue outside the uterine cavity. In patients with deep pelvic endometriosis, uterosacral ligaments, rectum, rectovaginal septum, vagina or bladder may be involved. Clinical manifestations may be variable, including pelvic pain, dysmenorrhea, dyspareunia, urinary symptoms and infertility. Complete surgical excision is the gold standard for treating this disease, and hence the importance of the preoperative work-up that usually is limited to an evaluation of sonographic and clinical data. Magnetic resonance imaging is of paramount importance in the diagnosis of endometriosis, considering its high accuracy in the identification of lesions intermingled with adhesions, and in the determination of peritoneal lesions extent. The present pictorial review describes the main magnetic resonance imaging findings in deep pelvic endometriosis. (author)

  20. Magnetic resonance imaging in deep pelvic endometriosis: iconographic essay

    International Nuclear Information System (INIS)

    Coutinho Junior, Antonio Carlos; Coutinho, Elisa Pompeu Dias; Lima, Claudio Marcio Amaral de Oliveira; Ribeiro, Erica Barreiros; Aidar, Marisa Nassar; Gasparetto, Emerson Leandro

    2008-01-01

    Endometriosis is characterized by the presence of normal endometrial tissue outside the uterine cavity. In patients with deep pelvic endometriosis, uterosacral ligaments, rectum, rectovaginal septum, vagina or bladder may be involved. Clinical manifestations may be variable, including pelvic pain, dysmenorrhea, dyspareunia, urinary symptoms and infertility. Complete surgical excision is the gold standard for treating this disease, and hence the importance of the preoperative work-up that usually is limited to an evaluation of sonographic and clinical data. Magnetic resonance imaging is of paramount importance in the diagnosis of endometriosis, considering its high accuracy in the identification of lesions intermingled with adhesions, and in the determination of peritoneal lesions extent. The present pictorial review describes the main magnetic resonance imaging findings in deep pelvic endometriosis. (author)

  1. From Postcolonial Criticism to Critics on Postcolonial Poetics – Edward Said's Orientalism from an Iconographic Perspective

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    Tobias Akira Schickhaus

    2017-05-01

    Full Text Available Inside and outside the academy, Edward Said's work is both preeminent and controversial. Combining literary theory, the history of ideas, political analysis and the sociology of intellectuals, his groundbreaking book Orientalism has radically transformed the field of Oriental studies, arguably laying the foundation for postcolonial studies. Criticizing the condition of the Palestinian people, Said also has constantly provided a critique of US government policy in the Middle East and has thus proposed a model of intellectual skepticism which deals with political issues. This combination of political and academic interventions is one reason "for Said’s special position in contemporary Western intellectual life" (Kennedy 3. If we look at Said's classic monography as a painting of geographical knowledgelandscapes, an iconographical investigation into the traditions of knowledge and ideological styles becomes possible. This paper will begin by presenting Orientalism's arguments and will then summarize the main critiques aimed at Said. It continues to describe the analytic discourse in Orientalism based on the method of iconographic interpretation as described in Panofsky's collection of essays Meaning in the Visual Arts. This interdisciplinary approach intends to demonstrate the argumentative circularity and self-reflexivity inherent in Said's criticism: by drawing exclusively on Western histories of ideas, the concept Orientalism itself can become the object of postcolonial criticism.

  2. The Punishment of Tarpeia and Its Possible Iconographic Inspiration

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    Lenka Vacinová

    2017-10-01

    Full Text Available The motif of the Punishment of Tarpeia is surprisingly rare in Roman visual arts. However, the surviving examples show iconographical unity and imply their common primary visual source of inspiration. The article is exploring the possible models considering the less obvious iconographical similarities and resemblances in terms of content found in the Greek art. The cases of the infamous intriguer Dirce and traitor Dolon are discussed, as well as the remarkable resemblances found on some images of the Death of Caeneus. While the latter indicates the inspiration based on free associations and the similar circumstances of death of the both protagonists, Dolon and Dirce seem to influence the creator of the iconographic scheme of the Punishment of Tarpeia in a more straight way.

  3. THE MONK, EQUAL TO THE MARTYRS? MOLDAVIAN ICONOGRAPHIC INSTANCES

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    Vlad BEDROS

    2015-11-01

    Full Text Available This paper deal s with an aspect of the iconographic selection in Moldavian mural paintings (15th - 16th centuries. Instigated by cases which insert monks in the program of the bay linking the apse to the naos, the analysis tries to reveal the strategies of including monas tic presences in the naos, to point at several late byzantine parallels and to advance an interpretation for this peculiar option. Its diverse contexts involve also slight changes of meaning, which are addressed as well. The iconographic syntax at stake in vites to „erudite‟ analysis, but a more flexible exploration, aware of the oral aspect of cultural transmission, might prove just as suitable.

  4. Iconographic Analysis of Media Texts on Media Literacy Education Classes

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    Alexander Fedorov

    2015-07-01

    Full Text Available Iconographic analysis is associative analysis of the media texts’ images (eg, water, fire - as symbols of purity and destruction associated with the semiotic analysis. Art historians, scientists, semiotics, media theorists and practitioners of media education have written thousands of volumes, which convincingly proved that the decoding / decoding of audio-visual images sometimes difficult, requiring considerable knowledge and skills of the process of intellectual and creative work. Iconographic analysis of media texts based on the key concept of media language, and suggests that media education aims to develop knowledge of the ways in which media texts express his idea, and develop the knowledge, improving skills of textual analysis that can be attached to fixed or moving images recorded on the medium of sound or any combination of the above. The initial stage of the iconographic analysis of media texts offer students concentrate on careful perception of audiovisual images on the description of their characteristic features. The audience learns conventional codes of media texts, followed by a smooth transition to the interpretation and evaluation of media texts. As a result, the audience media competence is developing in relation to visual images.

  5. THE ICONOGRAPHIC COLOUR SYMBOLISM IN BIBLICAL POEMS BY SERGEI YESENIN

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    Natalia Vladimirovna Mikhalenko

    2014-11-01

    Full Text Available The Biblical poems by Sergei Yesenin are full of pathos of theurgic reforms and creation of a new world. All components of these poems (images, spatial-temporal organization, colour symbolics stressed the importance of ongoing changes. The colours in small poems not only correspond to normal natural colours, but also bear a symbolic meaning, drawing the reader to the iconographic mysticism. The colourful preferences correspond to the tradition (of the Old or New Testaments, iconography or liturgy, as well as scenic tradition, which Yesenin follows in his poetry. Creating images of cosmic transformation, the poet turns to the traditional icon colour combinations and reinterprets the Old and New Testaments images. It puts the cases of prophet Sergei Yesenin in line with the acts of the biblical prophets. All poems in their colour scheme are consistent with iconographic tradition. In these poems three basic colours are used which repeat the colours of thematically close icons. So, Th e Coming is coloristically associated with the icon of the Nativity, The Transfiguration corresponds to the eponymous icon of Christ. The colours show the relationship and the parallelism of the processes occurring in earthly and heavenly worlds. It emphasizes the unity of the poetic world, the engagement of the Earth and the Heaven in the conversion process. The consideration of Yesenin’s revolutionary epic in line with biblical and iconographic symbolism allows analyzing in a more detailed and deep way originality of poetic recreation of the World and enables to reveal philosophical and esoteric content of the works.

  6. Bulky abdominal masses in pediatrics: iconographic essay; Massas abdominais volumosas em pediatria: ensaio iconografico

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    Reis, Fabiano; Faria, Andreia V.; Kluge, Patricia D.; Volpato, Ricardo G.; Santos, Sergio L.M. dos; Caserta, Nelson M.G. [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Ciencias Medicas]. E-mail: fabiano97@bol.com.br

    2005-04-15

    The ultrasound, computerized tomography and magnetic resonance findings of 19 patients with abdominal bulky masses diagnosed as hydronephrosis, Wilms' tumor, neuroblastoma, adrenal carcinoma, sarcoma, hemangioendothelioma, hepatoblastoma, mesenchymal hamartoma, hepatocellular carcinoma, choledochal cyst, splenic cyst, lymphoma, enteric cyst, teratoma, hydrometrocolpos and lipoma are presented. Imaging findings (including ultrasound, computerized tomography and magnetic resonance imaging) are important tools for the evaluation of abdominal masses in pediatric patients and can contribute to the diagnosis and evaluation of the extension of these diseases. (author)

  7. Hellenistic grotesque terracotta figurines. Problems of iconographical interpretation

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    Eszter Süvegh

    2015-02-01

    Full Text Available In the study of grotesque terracotta statuettes from the Hellenistic Age many questions are yet to be answered, including the ‘identity’ of these figurines. This article aims at giving reference points for the iconographical interpretation of the grotesques. In the first part of the article I collected some circumstances hindering the decipherment of the grotesque terracottas. Then, as the majority of these objects are head fragments broken from the bodies of statuettes, I tried to present details and attributes that may hint at the original meaning of the figurines, even without any knowledge of the missing parts of their bodies. These details include hairstyle and headwear, facial features typical of certain ethnic groups, signs of medical condition, characteristic injuries and features known from the sphere of the theatre.

  8. Scholarly Essays.

    Science.gov (United States)

    American Education, 1983

    1983-01-01

    A selection of essays by 12 1983 Presidential Scholars entitled Opportunity in America; Under the Influence of High Fashion; Law and Human Freedom; The Effects of Computers in Education; Prejudice, Cultural Heritage, and National Unity; The Visual Artist in a Technological Society; Dorothy Meets Schopenhauer; Rise Above; and Mathematics as a…

  9. Ecosociological essays

    International Nuclear Information System (INIS)

    Vaillancourt, J.

    1982-01-01

    This book contains a collection of 25 essays, articles and reports of work in the domain of environmental sociology, a new area of sociology which can be labelled ΣecosociologyΣ. This area is situated on the border between sociology and ecology but from the point of view of sociology rather than that of ecology

  10. Video essay

    DEFF Research Database (Denmark)

    2015-01-01

    Camera movement has a profound influence on the way films look and the way films are experienced by spectators. In this visual essay Jakob Isak Nielsen proposes six major functions of camera movement in narrative cinema. Individual camera movements may serve more of these functions at the same time...

  11. Contested Images: Iconographical approaches to the MENA-region

    Directory of Open Access Journals (Sweden)

    Georg Leube

    2017-05-01

    Full Text Available This special issue of META: Middle East, Topics and Arguments, engages with the methodology of iconography, an area that was originally developed in the study traditions, iconography is used to reconstruct the meaning of depictions, buildings and other material artifacts, and it does so by integrating the elements of a given representation into its broader historical and cultural context. Ideally, iconography thereby becomes a means of reconstructing both the original aims of the producer of a message, and the ways in which that message was received by its original audience. In this volume of META, we argue that this approach can and should be adapted to fields transcending the frame of art history and material culture in order to allow greater field of Social and Cultural Studies as a whole. We see iconography, or the synchronistic study of the combination of discrete elements in spatially and temporally bounded areas, as a powerful tool in reconstructing the relationship between the sender and the receiver of a message by focusing on the semiotic context, or Language of Forms (Formensprache, in which communication takes place. By focusing especially on the permeability between different repertoires, the performativity inherent in any act of social communication and the technology underlying the mobilization of semantically charged elements, we aim to explore some of the most promising dimensions in which we believe iconographical approaches can be fruitfully employed in Social and Cultural Studies.

  12. Criptococose pulmonar: aspectos na tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Silva Ana Carina Gamboa da

    2003-01-01

    Full Text Available A criptococose pulmonar é uma doença causada pelo Criptococcus neoformans, um fungo unimórfico que possui distribuição mundial, existindo na mesma forma tanto no seu habitat natural quanto em animais e humanos. A doença possui apresentações clínica e patológica variáveis e pode manifestar-se tanto em pacientes com a imunidade normal como em imunocomprometidos, que representam a maioria dos casos. Neste trabalho são analisados os aspectos encontrados nas tomografias computadorizadas do tórax de 14 pacientes com criptococose pulmonar confirmada. Os achados mais freqüentes na tomografia do tórax foram as massas e os nódulos pulmonares. Outros aspectos observados foram as áreas de escavação, as consolidações, o espessamento do interstício peribroncovascular e o reticulado difuso. Massa pulmonar foi o achado isolado mais comum (64,2%, seguido dos nódulos isolados ou múltiplos (35,7%. Doença pulmonar difusa foi vista em apenas 14,2% dos casos. Os lobos superiores foram os mais comprometidos, sendo a doença mais comum nas regiões anteriores. A tomografia do tórax permitiu avaliar com precisão o grau de comprometimento do parênquima pulmonar.

  13. Sexual Essays

    DEFF Research Database (Denmark)

    Giles, James

    Through a series of interrelated essays, this book explores fundamental issues concerning gender, sexual and romantic attraction, sexual desire and fantasies, the sexual positions, age dysphoria, and the role of naked skin in human sexuality. It does so by exploring experiential, social, biological......, and evolutionary aspects of sexual life. The author criticizes several popular views, rejecting both social constructionist accounts of gender and social constructionist and biological accounts of sexual desire. It is argued instead that gender roles and gender are often confused and that gender itself is based...... on sex. It is further argued that sexual desire is an existential need based on the experience of having a gendered body. A case study of age dysphoria is presented showing how the conclusions concerning concerning gender and desire apply in an atypical case. The body's fundamental role in sexuality...

  14. Images of the Mind and Images for the Eye. An Iconographical Approach to UFO-Mythology

    Directory of Open Access Journals (Sweden)

    Mikael Rothstein

    1996-01-01

    Full Text Available In the study of contemporary new religions and popular religious or metaphysical notions, the iconographical sources are often sadly overlooked. In this article it is the intention to present an iconographical approach to one single, although significantly versatile, aspect of modern, non-traditional mythology, namely the notion of "flying saucers" or UFOs (i.e. Unidentified Flying Objects. The actual UFO-religions may be insignificant in terms of adherence, but the very concept of UFOs holds a strong position in contemporary metaphysics and spirituality, as we find it in the so called New Age movement and elsewhere. Starting with the very notion of strange circular phenomena in the sky, a vast and very differentiated mythology of "flying saucers" or UFOs has developed. As far as the iconographical presentations reflect the narrative structure(s of the UFO myth, these pictures are integrated elements of the UFO story, and sometimes even agents of a further ufological development.

  15. Three essays on banking

    NARCIS (Netherlands)

    Vlahu, R.E.

    2011-01-01

    This dissertation consists of three essays on banking and concentrates on two topics. The first two essays deal with strategic behavior of borrowers. The third essay explores the relation between bank capital and risk-taking. The first essay, Collective Strategic Defaults: Bailouts and Repayment

  16. Essays in Regulatory Economics

    OpenAIRE

    Guerrero, Santiago

    2011-01-01

    This dissertation consists of three essays. The objective of the essays is to study the impacts of different regulations on the behavior of regulated agents. The first two essays focus on the analysis of non-traditional regulatory policies that complement traditional regulations consisting of inspections and fines for plants that violate regulations. The third essay studies the impacts of the Minimum Legal Drinking Age regulation on alcohol and marijuana consumption. The first essay of this d...

  17. Step-by-step iconographic description of a prolonged but still favourable course of orbital cellulitis in a child with acute rhinosinusitis: an iconographic case study.

    Science.gov (United States)

    Torretta, Sara; Marchisio, Paola; Gaffuri, Michele; Capaccio, Pasquale; Esposito, Susanna; Pignataro, Lorenzo

    2014-03-04

    Orbital cellulitis is an infrequent complication of acute ethmoiditis possibly leading to life- or visual-threatening complications. Despite its natural history is well known, its clinical evolution may widely vary among patients, and even in the most favourable cases long-term sequelae may persist. We here provide a step-by-step iconographic description of a periorbital and orbital cellulitis occurring in a child with ipsilateral acute rhinosinusitis. Our report shows that an unusual long-term evolution of periorbital and orbital cellulitis is possible also in apparently favourable cases.

  18. Anormalidades do primeiro trimestre da gravidez: ensaio iconográfico First trimester pregnancy abnormalities: iconographic essay

    Directory of Open Access Journals (Sweden)

    Lívia Teresa Moreira Rios

    2010-04-01

    Full Text Available As anormalidades do primeiro trimestre da gravidez são detectadas pela ultrassonografia transvaginal em exame de rotina ou em caso de sangramento vaginal anormal. A ameaça de abortamento é uma afecção comum no primeiro trimestre da gestação, ocorrendo em mais de um terço dos casos. O advento de sondas vaginais de alta resolução vem revolucionando nossa compreensão da fisiopatologia e o manejo da gestação inicial. Trata-se de ferramenta essencial para determinar a viabilidade da gestação nos casos de ameaça de abortamento. Uma conduta expectante no abortamento poderia reduzir significativamente o número de esvaziamentos desnecessários de produtos retidos, dependendo dos critérios utilizados.First trimester pregnancy abnormalities may be detected by transvaginal ultrasonography at routine examinations or in cases where abnormal vaginal bleeding is present. Threatened miscarriage is frequently observed in the first trimester, occurring in more than one-third of pregnancies. The advent of high-resolution transvaginal ultrasonography has revolutionized the understanding of the pathophysiology and the management of early pregnancy. This method represents an essential tool for determining the pregnancy viability in cases of threatened miscarriage. An expectant approach in the management of miscarriage could significantly reduce the number of unnecessary evacuations of retained products of conception, depending on the adopted criteria.

  19. Assessment of embryo/fetus during pregnancy by threedimensional ultrasonography using the HD live software: iconographic essay

    Directory of Open Access Journals (Sweden)

    Edward Araujo Júnior

    2015-02-01

    Full Text Available Fetal development is studied since the advent of two-dimensional ultrasonography. However, a detailed assessment of structures and surfaces improved with three-dimensional ultrasonography. Currently, it is possible to identify embryonic components and fetal parts with greater detail, at all pregnancy trimesters, using the HD live software, where the images gain realistic features by means of appropriate control of lighting and shadowing effects. In the present study, the authors utilized this resource to follow-up, by means of images, the development of a normal pregnancy along all trimesters.

  20. Humor discursive iconographic genres in the newspaper O Pasquim: a window for the freedom of expression

    OpenAIRE

    Petrini, Paulo; Universidade Estadual de Londrina

    2013-01-01

    This study analyses a sample of humor discursive iconographic genres, represented by the caricature, by the political caricature and by the cartoon, published in the newspaper O Pasquim. The aim was to understand how the publication was able to capture the spirit of the time (zeitgeist) during the civil-military dictatorship of the 1970s, looking at the cognitive processes of development of the collective imagination and, above all, how was it able to express the critical opinions towards the...

  1. Alberta Essay Scales: Models.

    Science.gov (United States)

    Nyberg, Verner R.; Nyberg, Adell M.

    The Alberta Essay Scales were developed to assist teachers in the grading of essays. They represent a standard based on written compositions at the 12th grade level in 1964 to be compared with current composition writing achievement. A scale for mechanics in English and one for writing style and content are defined through model essays and…

  2. Essays in Energy Economics

    OpenAIRE

    Paulus, Simon

    2018-01-01

    The thesis at hand presents four ‘stand-alone’ essays in energy economics. The first essay is motivated by the basic idea that utility resulting from electricity consumption differs in every hour of the day. This hypothesis translates into a deeper analysis on demand elasticities of higher temporal resolution. The empirical results show that German hourly demand elasticity ranges from -0.02 to -0.13 with a distinct demand elasticity pattern. The second essay investigates the influences of reg...

  3. Essays in political economy

    OpenAIRE

    Mavridis, Christos

    2016-01-01

    This thesis consists of five essays in the field of political economy. The first part of the thesis includes three essays covering various aspects of the political economy of globalization and economic reforms, which are linked in several ways. The second part of the thesis includes two essays on the political economy of development in India. The aim of this introductory section is to give a brief and non-technical overview of the essays, as well as to explain the links between them. The disc...

  4. The iconographic model of the Minerva from Collippo and its historic importance

    Directory of Open Access Journals (Sweden)

    Virgílio Hipólito Correia

    2014-12-01

    Full Text Available A statue head representing Minerva from the ancient Collippo (S. Sebastião do Freixo, Batalha is studied and its iconographic model is identified in a similar piece from the temple of Apollo Sosianus in Rome; other pieces of the same model are identified.It is proposed that this piece represents a remain of an intervention in the forum of the ancient town probably dating from the Claudio‑neronian period and its relation to similar processes occurring in the capital of the province of Lusitania is discussed.http://dx.doi.org/10.14195/2183-1718_66_16

  5. Essays in behavioral strategy

    NARCIS (Netherlands)

    Dumas, Jean-Malik

    2016-01-01

    This dissertation is composed of three quantitative empirical essays. Using social psychology, psychology and economic theory, the first essay explores how fear of death, belief in afterlife, self-esteem and generation influence the way employees project themselves in the future of their working

  6. Picturing Christ’s childhood: Some examples of a rare iconographic theme inspired by the infancy gospels

    Directory of Open Access Journals (Sweden)

    Fundić Leonela

    2013-01-01

    Full Text Available This article examines Byzantine wall paintings dated to the thirteenth and fourteenth century depicting a rare iconographic theme of Jesus’s childhood inspired by the Infancy Gospels. The iconography shows the Virgin Mary leading the child Jesus by the hand. The child is depicted holding different objects, such as a writing tablet, an unfurled scroll, or a wicker basket filled with flowers or fruits. Several of the scenes under examination have been hitherto misidentified or altogether unknown. In addition to this, the article interprets these representations in a broader iconographic context and addresses the possible origin of the theme.

  7. Essay about nuclear right

    International Nuclear Information System (INIS)

    Puig, D.

    1994-01-01

    The present essay treat about all Uruguaian Nuclear Energy legislation. Nuclear energy history, international treaties, agreements, national programs, nuclear government politics, radiation protection regulations, wastes, radioactive materials transport, environment and safeguards has been given in this compilation

  8. The Market for Essays

    OpenAIRE

    Burton, Michael P.; Rigby, Dan

    2012-01-01

    We investigate the market in bespoke essays from commercial providers which students buy to submit at their University. We conduct choice experiments at 3 universities to investigate students’willingness to enter the market. Half of the sample reveal a willingness to buy. We identify valuations of essays of varying grade and how these values decay as students’ assessments of their own abilities, and the penalty if caught, increase. A choice experiment over monetary gambles yields individual-s...

  9. Essays in energy economics

    Energy Technology Data Exchange (ETDEWEB)

    Malischek, Raimund

    2016-10-25

    This thesis presents four essays in energy economics. The first essay investigates one of the workhorse models of resource economics, the Hotelling model of an inter-temporally optimizing resource extracting firm. The Hotelling model provides a convincing theory of fundamental concepts like resource scarcity, but very few empirical validations of the model have been conducted. This essay attempts to empirically validate the Hotelling model by first expanding it to include exploration activity and market power and then using a newly constructed data set for the uranium mining industry to test whether a major resource extracting mining firm in the industry is following the theory's predictions. The results show that the theory is rejected in all considered settings. The second and third essays investigate the difference in market outcomes under spot-market based trade as compared to long-term contract based trade in oligopolistic markets with investments. The second essay investigates analytically the difference in market outcomes in an electricity market setting, showing that investments and consumer welfare may be higher under spot-market based trade than under long-term contracts. The third essay proposes techniques to solve large-scale models of this kind, empirically, by exploring the practicability of this approach in an application to the international metallurgical coal market. The final essay investigates the influence of policy uncertainty on investment decisions. With France debating the role of nuclear technology, this essay analyses how policy uncertainty regarding nuclear power in France may feature in the French and European power sector. Applying a stochastic model for the European power system, the analysis shows that the costs of uncertainty in this particular application are rather low compared to the overall costs of a nuclear phase-out.

  10. Essays in energy economics

    International Nuclear Information System (INIS)

    Malischek, Raimund

    2016-01-01

    This thesis presents four essays in energy economics. The first essay investigates one of the workhorse models of resource economics, the Hotelling model of an inter-temporally optimizing resource extracting firm. The Hotelling model provides a convincing theory of fundamental concepts like resource scarcity, but very few empirical validations of the model have been conducted. This essay attempts to empirically validate the Hotelling model by first expanding it to include exploration activity and market power and then using a newly constructed data set for the uranium mining industry to test whether a major resource extracting mining firm in the industry is following the theory's predictions. The results show that the theory is rejected in all considered settings. The second and third essays investigate the difference in market outcomes under spot-market based trade as compared to long-term contract based trade in oligopolistic markets with investments. The second essay investigates analytically the difference in market outcomes in an electricity market setting, showing that investments and consumer welfare may be higher under spot-market based trade than under long-term contracts. The third essay proposes techniques to solve large-scale models of this kind, empirically, by exploring the practicability of this approach in an application to the international metallurgical coal market. The final essay investigates the influence of policy uncertainty on investment decisions. With France debating the role of nuclear technology, this essay analyses how policy uncertainty regarding nuclear power in France may feature in the French and European power sector. Applying a stochastic model for the European power system, the analysis shows that the costs of uncertainty in this particular application are rather low compared to the overall costs of a nuclear phase-out.

  11. Automated Essay Scoring

    Directory of Open Access Journals (Sweden)

    Semire DIKLI

    2006-01-01

    Full Text Available Automated Essay Scoring Semire DIKLI Florida State University Tallahassee, FL, USA ABSTRACT The impacts of computers on writing have been widely studied for three decades. Even basic computers functions, i.e. word processing, have been of great assistance to writers in modifying their essays. The research on Automated Essay Scoring (AES has revealed that computers have the capacity to function as a more effective cognitive tool (Attali, 2004. AES is defined as the computer technology that evaluates and scores the written prose (Shermis & Barrera, 2002; Shermis & Burstein, 2003; Shermis, Raymat, & Barrera, 2003. Revision and feedback are essential aspects of the writing process. Students need to receive feedback in order to increase their writing quality. However, responding to student papers can be a burden for teachers. Particularly if they have large number of students and if they assign frequent writing assignments, providing individual feedback to student essays might be quite time consuming. AES systems can be very useful because they can provide the student with a score as well as feedback within seconds (Page, 2003. Four types of AES systems, which are widely used by testing companies, universities, and public schools: Project Essay Grader (PEG, Intelligent Essay Assessor (IEA, E-rater, and IntelliMetric. AES is a developing technology. Many AES systems are used to overcome time, cost, and generalizability issues in writing assessment. The accuracy and reliability of these systems have been proven to be high. The search for excellence in machine scoring of essays is continuing and numerous studies are being conducted to improve the effectiveness of the AES systems.

  12. Essays in Household Finance

    DEFF Research Database (Denmark)

    Hanspal, Tobin

    This Ph.D. thesis, entitled Essays in Household Finance, analyzes the determinants and implications of investment biases, personal experiences in financial markets, and financing disruptions on households, individual investors, and entrepreneurs and small business owners. The first essay...... on risk taking is the potential bias resulting from inertia and inattention, which has been shown to be endemic in household finance. If individuals are inert or inattentive, it is difficult to establish whether changes in risk taking are caused by personal experiences or whether the change in risk taking...

  13. Einstein's essays in science

    CERN Document Server

    Einstein, Albert

    2009-01-01

    His name is synonymous with ""genius,"" but these essays by the renowned physicist and scholar are accessible to any reader. In addition to outlining the core of relativity theory in everyday language, Albert Einstein presents fascinating discussions of other scientific fields to which he made significant contributions. The Nobel Laureate also profiles some of history's most influential physicists, upon whose studies his own work was based.Assembled during Einstein's lifetime from his speeches and essays, this book marks the first presentation to the wider world of the scientist's accomplishme

  14. The Career Planning Essay.

    Science.gov (United States)

    Lyon, Douglas W.; Kirby, Eric G.

    2000-01-01

    Describes a career planning essay as an opportunity for students to evaluate career goals; reflect on the relationship of values, career goals, and life goals; and develop an action plan. Provides instructional tips about timing, setup, and feedback for this exercise. (SK)

  15. The primitives of Santa Clara of Ubeda: stylistic and iconographic study, critical appraisals and vicissitudes of a dispersed heritage

    Directory of Open Access Journals (Sweden)

    Clara Beltrán Catalán

    2016-12-01

    Full Text Available The authors study the stylistic and iconographic aspects of a collection of paintings on wood dating from the 15th and 16th centuries, originally in the Royal Monastery of Santa Clara at Úbeda. This collection was sold in the 1920s with the participation of the antique dealer Celestino Dupont. The research is complemented by an analysis of the critical appraisals given to these works and their history since their introduction into the art market.

  16. CAREM reactor thermohydraulic essays laboratory

    International Nuclear Information System (INIS)

    Horro, R.; Mazzi, R.; Rossini, A.

    1990-01-01

    The main characteristics, essays projected and the present state of the Thermohydraulic Essays Laboratory -under construction at present- prepared to meet the experimental needs resulting from a power reactor design of the CAREM type, are herein described. (Author) [es

  17. Tomografia computadorizada no seguimento de pacientes com tumores intracranianos

    Directory of Open Access Journals (Sweden)

    Gilberto Machado de Almeida

    1981-03-01

    Full Text Available A tomografia computadorizada tem grande valor no controle dos pacientes com tumores cerebrais. Imediatamente após o ato cirúrgico pode ser útil para avaliar a retirada do processo expansivo ou para comprovar a área atingida. Nos primeiros dias após a intervenção tem sido indicada principalmente quando há piora do quadro neurológico. Nestas condições, o exame permite verificar a existência de ar, edema, hematoma, desvios ventriculares e hidrocéfalo. Os dados fornecidos são mais precisos que os obtidos com outros exames neuror-radiológicos ou com a medida contínua da pressão intracraniana, métodos menos inócuos. A longo prazo a tomografia permite o diagnóstico precoce de recidivas, a avaliação da eficácia de tratamentos radio ou quimioterápicos e o controle do hidrocéfalo. Ainda não é possível fazer o diagnóstico diferencial entre radio-necrose e recidiva tumoral.

  18. Achondroplasia among ancient populations of mesoamerica and South America: Iconographic and Archaeological Evidence.

    Science.gov (United States)

    Rodríguez, Carlos A; Isaza, Carolina; Pachajoa, Harry

    2012-07-01

    Achondroplasia is the most frequent form of short-limb dwarfism. Affected individuals exhibit short stature caused by rhizomelic shortening of the limbs, characteristic facies with frontal bossing and mid-face hypoplasia, genu varum, and trident hand. Although the etiology of this disease was reported in 1994, evidence of this disease in ancient populations has been found in populations of ancient Egypt (2500 BC) and it has been documented in ancient American populations. To analyze the presence of individuals with achondroplasia in the Mayan state society of Mexico and Guatemala, during the Classical (100- 950 AC ) and Post-Classical (950 - 1519 AC ) periods; likewise, in the hierarchical-chieftain society of Tumaco-la Tolita (300 BC - 600 AC ) from the Colombia-Ecuador Pacific coast, and the Moche state society (100 - 600 AC ) from the northern coast of Peru. Iconographic and clinical-morphological studies of some of the most important artistic representations of individuals of short stature in these three cultures. We present the hypothesis that the individuals with short stature were somehow associated with the political and religious power elite.

  19. Essays on Leadership,

    Science.gov (United States)

    1998-12-01

    disputes. In his essay, Mikhail Gorbachev addresses nonviolent responses to the breakup of the Soviet Union. He points out that modern leaders need to...34orphaned" by the global media in general. The poverty-beset individual, the desperate family , the beleaguered mi- nority, the ghastly conflict that...when he quoted our own statistics about the number of Americans who were homeless , lacked adequate health care, or were unemployed. Gromyko’s

  20. Essay-writing

    OpenAIRE

    Etherington-Wright, Christine

    2008-01-01

    Many students find essay writing challenging. The aim of this chapter is to divide this process into ‘bite-size’ stages, which will enable you to achieve a clear and persuasive academic writing style. To make your meaning clear you need to work out exactly what you are going to say about a topic and communicate this in a confident and logical manner. All students can improve with practice and attention to detail.

  1. Essays on electricity markets

    Energy Technology Data Exchange (ETDEWEB)

    Rud, Linda

    2009-07-01

    The report covers several topics of electricity markets: The first essay, 'Selected Topics on Early Electricity Market Design in Norway' studies market design issues in establishing the market-based Norwegian electricity market. Essays 2-4 focus on issues of network congestion: 'Capacity Charges: A Price Adjustment Process for Managing Congestion in Electricity Transmission Networks' presents the capacity charge approach for managing transmission constraints in electricity networks. 'Understanding the Stochastics of Nodal Prices: Price Processes in a Constrained Network' seeks a further understanding of stochastic nodal prices processes. 'Investment Evaluation in a Constrained Electricity Network with Stochastic Nodal Price Processes' studies how the interaction of the competitive market and the capacitated network affects the evaluation of investments under uncertainty, and points out potential pitfalls of evaluation. In the last essay, 'A Newsboy Model Perspective on the Power Market: The Case of a Wind Power Producer' we discuss aspects of optimal bidding for a wind power producer. (Author)

  2. Essays in microeconomics

    Science.gov (United States)

    Davies, Tim

    This dissertation consists of three essays in applied microeconomics. Each essay explores a different issue of economic interest. The essay in Chapter 2 describes an experiment designed to investigate if using assets with an intrinsic value that increases over time leads to persistent undervaluation in laboratory asset trading markets. This question has not previously been investigated by researchers. Results from ten sessions are reported. Three used assets with an intrinsic value that decreased over time. The results from these sessions are consistent with the findings by prior researchers who frequently observed price bubbles in laboratory asset trading experiments. The remaining seven sessions used assets with an intrinsic value that increased over time. In all these sessions trading generally occurred at prices below the asset's intrinsic value. In Chapter 3, in an essay co-authored with Adrian Stoian, we study road running races. Tournaments, where ordinal position determines rewards, are an important component of our economy. By studying sporting tournaments, we hope to shed light on the nature of other economically significant tournaments where data may be less readily available. We separately quantify the sorting and incentive effects of tournament prizes by employing a novel two-part model which we apply to a unique data set of road running race results. We present a counterfactual example of how a hypothetical change in prizes would be predicted to change race participation and speed. In Chapter 4, in an essay co-authored with Jedidiah Brewer and Joseph Cullen, we examine the combined effects of the locations and the brands of retail gasoline outlets in Tucson, Arizona on market prices. We apply an innovative approach to model the impact of competing gas stations that avoids limiting analysis to predetermined nearby locations. We show that increased brand diversity is associated with higher prices and that gas stations affiliated with mass

  3. Iconographical identification of the time for complete fusion of radius and fusion trace

    International Nuclear Information System (INIS)

    Qian Li; Wang Guohong; Zang Da; Li Fuxing; Xia Zhantong; Zhu Dixin; Xu Jianmin; Wu Yongchao

    2008-01-01

    Objective: To investigate the method for iconographical identification of complete fusion of radius and fusion trace. Methods: 31 cases under age 18 were photographed in the left wrists twice at anteroposterior position and the 30 degree and 45 degree vertical position by X ray in the same day, with 124 pictures exposed totally. For each case of the control group over 18, an anteroposterior picture was obtained and pictures at an angle with 6 cases, totally 17 pictures exposed. All the pictures were 141 exposed totally from 42 cases. A comparison then was made as for the morpha of the far-end of radius, the relationship with radius, the presence of low-density epiphyseal line and the fusion status of ulna between two groups. Results: Subject Group: the gap was extended into the frame of the radius and low density-epiphyseal line and gap existed in the base of proeessus styloldeus for patients with incomplete fusion. 8 cases of low-epiphyseal lines were found from multi-angle and multi-location. In the contrast group, the far-end gap was outside of the frame of radius and didn't extend into the frame of radius and the internal edge of the gap was normally closed by the bone cortex. Dense fusion line of the radius was not found in 7 cases (64%) and the ulna was completely fused. Conclusion: Different from that of fusion trace, low-density epiphyseal line of the radius was not found from multi-angle and multi-location. It was identified that the gap was within the flame of radius and the base of the ulna proeessus styloldeus was not completely fused. Non-thoroughly fusion in radius could be confirmed. (authors)

  4. Women and Punk in Spain during the Transition: Iconographic Principles of an Attitude

    Directory of Open Access Journals (Sweden)

    Rafael Gómez Alonso

    2017-10-01

    Full Text Available This article discusses the development of music bands fronted by women during the Spanish democratic Transition —a period characterized by the emergence of youth cultures— and how these bands were to a large extent stimulated by the effervescence of what came to be known as the punk movement. The aesthetics of punk is inspired by the artistic avant-garde of the early twentieth century, and it can also be read as a process of mimetic representation of certain iconic “fallen stars”. This study aims to explore how this legitimation takes place and how the visual culture itself and its diffusion through certain means of communication fosters a change in the visual perception, with the incorporation into postmodernity of certain marginal discourses that emerge out of the very process of sociocultural liberalization that was taking place in Spain at the time. However, the iconographic elements used by the urban subcultures and adopted by female punks in Spain gain strength not only by their visual impact but also by the attitude that they convey. The role of women within this type of mediated subversion will be decisive in a country where identity policies have not yet been legitimized and where a new social context is being articulated, laying the foundations of the feminist attitude. From this point of view, the rebellious attitude adopted by the punk movement will not only imply a strategy of disruption in face of the then-prevailing conventions in the systems of visual representation, but it will also imply a radical change in the formation of feminist discourse as the basis of integration in contemporary society.

  5. Pictorial essay: Distal colostography

    Directory of Open Access Journals (Sweden)

    Rahalkar Mukund

    2010-01-01

    Full Text Available Distal colostography (DC, also called distal colography or loopography, is an important step in the reparative management of anorectal malformations (ARMs with imperforate anus, Hirschsprung′s disease (occasionally and colonic atresia (rarely in children and obstructive disorders of the distal colon (colitis with stricture, carcinoma or complicated diverticulosis in adults. It serves to identify/confirm the type of ARM, presence/absence of fistulae, leakage from anastomoses, or patency of the distal colon. We present a pictorial essay of DC in a variety of cases.

  6. Three Essays on Macroeconomics

    Science.gov (United States)

    Doda, Lider Baran

    This dissertation consists of three independent essays in macroeconomics. The first essay studies the transition to a low carbon economy using an extension of the neoclassical growth model featuring endogenous energy efficiency, exhaustible energy and explicit climate-economy interaction. I derive the properties of the laissez faire equilibrium and compare them to the optimal allocations of a social planner who internalizes the climate change externality. Three main results emerge. First, the exhaustibility of energy generates strong market based incentives to improve energy efficiency and reduce CO 2 emissions without any government intervention. Second, the market and optimal allocations are substantially different suggesting a role for the government. Third, high and persistent taxes are required to implement the optimal allocations as a competitive equilibrium with taxes. The second essay focuses on coal fired power plants (CFPP) - one of the largest sources of CO2 emissions globally - and their generation efficiency using a macroeconomic model with an embedded CFPP sector. A key feature of the model is the endogenous choice of production technologies which differ in their energy efficiency. After establishing four empirical facts about the CFPP sector, I analyze the long run quantitative effects of energy taxes. Using the calibrated model, I find that sector-specific coal taxes have large effects on generation efficiency by inducing the use of more efficient technologies. Moreover, such taxes achieve large CO2 emissions reductions with relatively small effects on consumption and output. The final essay studies the procyclicality of fiscal policy in developing countries, which is a well-documented empirical observation seemingly at odds with Neoclassical and Keynesian policy prescriptions. I examine this issue by solving the optimal fiscal policy problem of a small open economy government when the interest rates on external debt are endogenous. Given an

  7. Essays in applied economics

    Science.gov (United States)

    Arano, Kathleen

    Three independent studies in applied economics are presented. The first essay looks at the US natural gas industrial sector and estimates welfare effects associated with the changes in natural gas regulatory policy over the past three decades. Using a disequilibrium model suited to the natural gas industry, welfare transfers and deadweight losses are calculated. Results indicate that deregulation policies, beginning with the NGPA of 1978, have caused the industry to become more responsive to market conditions. Over time, regulated prices converge toward the estimated equilibrium prices. As a result of this convergence, deadweight losses associated with regulation are also diminished. The second essay examines the discounted utility model (DU), the standard model used for intertemporal decision-making. Prior empirical studies challenge the descriptive validity of the model. This essay addresses the four main inconsistencies that have been raised: domain dependence, magnitude effects, time effects, and gain/loss asymmetries. These inconsistencies, however, may be the result of the implicit assumption of linear utility and not a failure of the DU model itself. In order to test this hypothesis, data was collected from in-class surveys of economics classes at Mississippi State University. A random effects model for panel data estimation which accounts for individual specific effects was then used to impute discount rates measured in terms of dollars and utility. All four inconsistencies were found to be present when the dollar measures were used. Using utility measures of the discount rate resolved the inconsistencies in some cases. The third essay brings together two perspectives in the study of religion and economics: modeling religious behavior using economic tools and variables, and modeling economic behavior using religious variables. A system of ordered probit equations is developed to simultaneously model religious activities and economic outcomes. Using data

  8. Essays on Labour Markets

    DEFF Research Database (Denmark)

    Buhai, Ioan Sebastian

    This book represents an eclectic combination of four independent, self-contained essays on various dimensions of the labour market. The main chapters focus on theoretically and empirically analyzing the dynamics of the employment relationship between workers and firms (chapters 2 and 3), on model......This book represents an eclectic combination of four independent, self-contained essays on various dimensions of the labour market. The main chapters focus on theoretically and empirically analyzing the dynamics of the employment relationship between workers and firms (chapters 2 and 3...... to its research topic with original and innovative theoretical and/or empirical insights, often building on techniques borrowed from other economic fields or disciplines. Such uncommon approaches are real options methodology applied to wage-tenure profile analysis; social network modelling...... of occupational segregation, income and employment differentials; or microeconometric estimation of firm production functions augmented with workplace health and safety indicators. Among the conclusions of this thesis, to be interpreted in the light of all corresponding assumptions and caveats extensively...

  9. Iconographic analysis of the theme of "Bathsheba Bathing" in Books of Hours of 15th and 16th Century

    Directory of Open Access Journals (Sweden)

    Elsa Guyot

    2013-04-01

    Full Text Available In the light of biblical exegesis and medieval literature, this paper proposes an iconographic analysis of the theme of "Bathsheba Bathing" as it appears in Books of Hours. From the fifteenth to the sixteenth century, pictorial representations of this Old Testament scene experienced a boom justified by the underlying eroticism of this episode in which David surprises Bathsheba as she is performing a ritual purification bath. The illuminations that we study reflect the encounter between the Christian tradition and humanistic culture.

  10. Essay Genre in Tatar Journalism

    Directory of Open Access Journals (Sweden)

    Aigul A. Guseinova

    2017-11-01

    Full Text Available In this article, an essay is considered as a journalistic genre in the context of modern Tatar journalism. Using the example of works by contemporary authors in the Tatar-speaking periodicals of Russia, the main genre and the semantic features of this genre are studied. An essay is a publicistic form to reflect on the topical issues of Russian reality. The reproduction of a fact is not so important for an essay. An important role is played by the description of the author's impressions, reflections and emotions. The periodical press has many materials in the Tatar language in which the author's opinion, author's principle and subjective opinion are strongly expressed. In fact, during the last decades of the twentieth century and the beginning of the twenty-first century there was a surge of essays in modern journalism. Due to some political events in Russia during the early 90s of the twentieth century, it was possible to express their thoughts and speak on the urgent problems in society openly in comparison with the Soviet reality. The object of research is essayism as a kind of journalistic creativity, the subject of the study is the essay genre in Tatar journalism. The empirical basis of the work consisted of the essays from Tatar journalists, publicists and writers. Provided that the personality of an author is one of the effectiveness factors concerning the publications in the genre of essay, the essayization of texts in Tatar journalism will be increased in the future.

  11. Essays on Housing Markets

    DEFF Research Database (Denmark)

    Bäckman, Claes

    In Denmark and in many countries around the world, housing markets are of considerable importance for households and policy-makers alike. As the boom and bust in the US and Danish housing market so aptly demonstrated, disruptions in the housing market potentially have wide-ranging consequences...... for individual households and for the aggregate economy. Housing is important because we all have to live somewhere, but also because it serves as a considerable source of both wealth and debt. As such, housing market policy can not only create vast benefits for many, but can also have substantial negative...... impacts for all, and should therefore be a topic of major interest for economists and policy makers alike. This Ph.D. thesis, entitled “Essays on Housing Markets”, analyzes the Danish housing market during the 2000s, with a focus on how policy changes affected house prices and how changes in house prices...

  12. Writing a pictorial essay.

    Science.gov (United States)

    Peh, W C G; Ng, K H

    2010-03-01

    A pictorial essay is a type of educational article that aims to provide both textual and visual portrayals of a topical issue. It usually consists of a short unstructured abstract, brief introduction, subheadings to organise the material and a summary. The number of references is limited to a few key articles, typically, eight to 15, or fewer. The text is usually short, often approximately 1,000 to 2,000 words in length, with much of the message contained in the figure legends. This type of article allows for a large number of figures, typically up to 20 figures or 30 figure parts. The main criteria for publication are currency, educational value and high quality of illustrations.

  13. Three essays in econometric theory

    NARCIS (Netherlands)

    Gan, Zhuojiong

    2015-01-01

    This thesis consists of three essays in econometric theory. In the first essay, he considers a prediction problem with a large number of predictors. He improves the prediction precision of the standard factor model by allowing some variables to have idiosyncratic factors that are relevant for

  14. Iconographic analysis of the covers of school editions of Don Quijote between the Second Republic and Francoism

    Directory of Open Access Journals (Sweden)

    Luis Rodrigo Martín

    2016-11-01

    Full Text Available Don Quixote is the most recognized work of Spanish and universal literature, and teaching adaptations in schools are very important for children to understand their reading. Compulsory reading of the work during the period between the Second Republic and the Franco regime caused many school adaptations to suit their classroom teaching. This study focused on the graphic elements of the work from a communicative and iconographic perspective, allows through content analysis of a cataloged and representative sample of the covers of school adaptations, verify that the hard political interventionism that suffered the work according antagonistic dominant ideologies did not influence their design, because these spaces were not ideologically charged, despite being the first element of commercial persuasion of the book and its role motivate reading. Analytical data along with historical explain the existence of a commercial image of Quixote free of ideological connotations (on the cover, from his iconographic path, which we have not found significant differences from the two dominant ideologies. However, the politicization of the work contributed to Don Quixote became the national hero of children and adults and a universal benchmark of behavior full of great ethical and moral values.

  15. Alterações difusas da traquéia: aspectos na tomografia computadorizada Diffuse abnormalities of the trachea: computed tomography findings

    Directory of Open Access Journals (Sweden)

    Edson Marchiori

    2008-01-01

    Full Text Available O objetivo deste ensaio pictórico foi apresentar as principais alterações tomográficas observadas em doenças que acometem a traquéia de forma difusa. As doenças estudadas foram amiloidose, traqueobroncopatia osteocondroplástica, traqueobroncomegalia, papilomatose laringo-traqueo-brônquica, linfoma, neurofibromatose, policondrite recidivante, granulomatose de Wegener, tuberculose, paracoccidioidomicose e traqueobroncomalácia. O principal aspecto observado na tomografia computadorizada foi o espessamento das paredes traqueais, com ou sem nodulações, calcificações parietais ou comprometimento da parede posterior. Embora a tomografia computadorizada permita a detecção e a caracterização das doenças das vias aéreas centrais, e a correlação com os dados clínicos reduza as possibilidades diagnósticas, a broncoscopia com biópsia continua sendo o procedimento mais importante no diagnóstico das lesões difusas da traquéia.The aim of this pictorial essay was to present the main computed tomography findings seen in diffuse diseases of the trachea. The diseases studied included amyloidosis, tracheobronchopathia osteochondroplastica, tracheobronchomegaly, laryngotracheobronchial papillomatosis, lymphoma, neurofibromatosis, relapsing polychondritis, Wegener's granulomatosis, tuberculosis, paracoccidioidomycosis, and tracheobronchomalacia. The most common computed tomography finding was thickening of the walls of the trachea, with or without nodules, parietal calcifications, or involvement of the posterior wall. Although computed tomography allows the detection and characterization of diseases of the central airways, and the correlation with clinical data reduces the diagnostic possibilities, bronchoscopy with biopsy remains the most useful procedure for the diagnosis of diffuse lesions of the trachea.

  16. Essays in applied microeconomics

    Science.gov (United States)

    Davis, Lucas William

    2005-11-01

    The first essay measures the impact of an outbreak of pediatric leukemia on local housing values. A model of residential location choice is used to describe conditions under which the gradient of the hedonic price function with respect to health risk is equal to household marginal willingness to pay to avoid pediatric leukemia risk. This equalizing differential is estimated using property-level sales records from a county in Nevada where residents have recently experienced a severe increase in pediatric leukemia. Housing values are compared before and after the increase with a nearby county acting as a control group. The results indicate that housing values decreased 15.6% during the period of maximum risk. Results are similar for alternative measures of risk and across houses of different sizes. With risk estimates derived using a Bayesian learning model the results imply a statistical value of pediatric leukemia of $5.6 million. The results from the paper provide some of the first market-based estimates of the value of health for children. The second essay evaluates the cost-effectiveness of public incentives that encourage households to purchase high-efficiency durable goods. The demand for durable goods and the demand for energy and other inputs are modeled jointly as the solution to a household production problem. The empirical analysis focuses on the case of clothes washers. The production technology and utilization decision are estimated using household-level data from field trials in which participants received front-loading clothes washers free of charge. The estimation strategy exploits this quasi-random replacement of washers to derive robust estimates of the utilization decision. The results indicate a price elasticity, -.06, that is statistically different from zero across specifications. The parameters from the utilization decision are used to estimate the purchase decision using data from the Consumer Expenditure Survey, 1994-2002. Households

  17. Plagiarism in residency application essays.

    Science.gov (United States)

    Segal, Scott; Gelfand, Brian J; Hurwitz, Shelley; Berkowitz, Lori; Ashley, Stanley W; Nadel, Eric S; Katz, Joel T

    2010-07-20

    Anecdotal reports suggest that some residency application essays contain plagiarized content. To determine the prevalence of plagiarism in a large cohort of residency application essays. Retrospective cohort study. 4975 application essays submitted to residency programs at a single large academic medical center between 1 September 2005 and 22 March 2007. Specialized software was used to compare residency application essays with a database of Internet pages, published works, and previously submitted essays and the percentage of the submission matching another source was calculated. A match of more than 10% to an existing work was defined as evidence of plagiarism. Evidence of plagiarism was found in 5.2% (95% CI, 4.6% to 5.9%) of essays. The essays of non-U.S. citizens were more likely to demonstrate evidence of plagiarism. Other characteristics associated with the prevalence of plagiarism included medical school location outside the United States and Canada; previous residency or fellowship; lack of research experience, volunteer experience, or publications; a low United States Medical Licensing Examination Step 1 score; and non-membership in the Alpha Omega Alpha Honor Medical Society. The software database is probably incomplete, the 10%-match threshold for defining plagiarism has not been statistically validated, and the study was confined to applicants to 1 institution. Evidence of matching content in an essay cannot be used to infer the applicant's intent and is not sensitive to variations in the cultural context of copying in some societies. Evidence of plagiarism in residency application essays is more common in international applicants but was found in those by applicants to all specialty programs, from all medical school types, and even among applicants with significant academic honors. No external funding.

  18. Rhombencephalitis: pictorial essay

    Directory of Open Access Journals (Sweden)

    Líllian Gonçalves Campos

    Full Text Available Abstract The term rhombencephalitis refers to inflammatory diseases affecting the hindbrain (brainstem and cerebellum. Rhombencephalitis has a wide variety of etiologies, including infections, autoimmune diseases, and paraneoplastic syndromes. Infection with bacteria of the genus Listeria is the most common cause of rhombencephalitis. Primary rhombencephalitis caused by infection with Listeria spp. occurs in healthy young adults. It usually has a biphasic time course with a flu-like syndrome, followed by brainstem dysfunction; 75% of patients have cerebrospinal fluid pleocytosis, and nearly 100% have an abnormal brain magnetic resonance imaging scan. However, other possible causes of rhombencephalitis must be borne in mind. In addition to the clinical aspects, the patterns seen in magnetic resonance imaging can be helpful in defining the possible cause. Some of the reported causes of rhombencephalitis are potentially severe and life threatening; therefore, an accurate initial diagnostic approach is important to establishing a proper early treatment regimen. This pictorial essay reviews the various causes of rhombencephalitis and the corresponding magnetic resonance imaging findings, by describing illustrative confirmed cases.

  19. Osteogenesis imperfecta - iconographic study of two cases and review of the literature; Osteogenese imperfeita - revisao da literatura e iconografia baseada em dois casos

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Ricardo Pires de; Fernandes, Cintia; Hilario, Marcelo Cobra; Barros, Wagner Moraes; Soares, Aldemir Humberto [Hospital Heliopolis, Sao Paulo, SP (Brazil)

    1996-07-01

    The authors present a literature review about osteogenesis imperfecta, a disease that leads to bone fragility and low height patterns caused by an abnormality of the collagen synthesis. The iconographic study is based on two cases of the tarda type. (author) 9 refs., 3 figs.

  20. Essays on medieval computational astronomy

    CERN Document Server

    Bergón, José Chabás

    2014-01-01

    In Essays on Medieval Computational Astronomy the authors provide examples of original and intelligent approaches and solutions given by medieval astronomers to the problems of their discipline, mostly presented in the form of astronomical tables.

  1. The iconographic message of the Last Supper compositions from the collection of the National Museum of the History of Moldova

    Directory of Open Access Journals (Sweden)

    Adelaida Chiroşca

    2017-12-01

    Full Text Available Resuming the theme of the Holy Eucharist, which we initiated with the presentation of the icons Jesus Christ the Vine from the collection of the National Museum of the History of Moldova, we bring into discussion five other icons that remind us of an event of profound symbolic and spiritual significance – the Last Supper. The purpose of our research is, in particular, to determine the iconographic significance of the museum compositions, to identify in these images the evangelical topics related to the Last Supper. We also wanted highlight the variants of iconographic schemes established by specialists in this field, which can be recognized in the icons in question, establish the area of their origin and the time of their creation. In the Last Supper the spiritual principles of the Christian teaching are expressed, which are actual today. Inspired by the stories of the evangelical apostles, early Christian art will translate into images the major moments of the Last Supper. The topics of the washing the feet, the communion of the apostles, the Last Supper, the Eucharist, being programmed in the church iconography, will be reflected on different areas of the altar and the nave, depending on the functional and semantic aspects, strengthening the spiritual message of the Eucharist or the cycle of the Passion of the Lord. On the five museum’s icons devoted to the subject of the Last Supper similar scenes are presented at first sight. However, a careful study of their compositions reveals some differences regarding the representation of the background architecture, the way the apostles are placed, their poses, the representation of the decoration elements, the accessories, etc. In accordance with the above, it should be noted that these icons depict different episodes of the Last Supper. The Last Supper compositions from the collections of the National Museum of the History of Moldova, first published and deserving attention of specialists, will

  2. Reliability of the Alberta Essay Scales.

    Science.gov (United States)

    Nyberg, V. R.; Nyberg, A. M.

    1980-01-01

    A respectable reliability of scoring twelfth-grade essays can be achieved through the use of essay models in the two Alberta Essay Scales (style-content and mechanics). The scales can assist classroom teachers in the day-to-day scoring of essays by providing a constant standard. (Author/SB)

  3. Essays in Applied Microeconomics

    Science.gov (United States)

    Ge, Qi

    This dissertation consists of three self-contained applied microeconomics essays on topics related to behavioral economics and industrial organization. Chapter 1 studies how sentiment as a result of sports event outcomes affects consumers' tipping behavior in the presence of social norms. I formulate a model of tipping behavior that captures consumer sentiment following a reference-dependent preference framework and empirically test its relevance using the game outcomes of the NBA and the trip and tipping data on New York City taxicabs. While I find that consumers' tipping behavior responds to unexpected wins and losses of their home team, particularly in close game outcomes, I do not find evidence for loss aversion. Coupled with the findings on default tipping, my empirical results on the asymmetric tipping responses suggest that while social norms may dominate loss aversion, affect and surprises can result in freedom on the upside of tipping. Chapter 2 utilizes a novel data source of airline entry and exit announcements and examines how the incumbent airlines adjust quality provisions as a response to their competitors' announcements and the role of timing in such responses. I find no evidence that the incumbents engage in preemptive actions when facing probable entry and exit threats as signaled by the competitors' announcements in either short term or long term. There is, however, evidence supporting their responses to the competitors' realized entry or exit. My empirical findings underscore the role of timing in determining preemptive actions and suggest that previous studies may have overestimated how the incumbent airlines respond to entry threats. Chapter 3, which is collaborated with Benjamin Ho, investigates the habit formation of consumers' thermostat setting behavior, an often implicitly made decision and yet a key determinant of home energy consumption and expenditures. We utilize a high frequency dataset on household thermostat usage and find that

  4. Essays in public economics

    Science.gov (United States)

    Seligman, Jason Scott

    2002-01-01

    Three essays in the field of public economics are included in this thesis. Chapter 1 begins this work with an introduction to public economics and places the remaining chapters in context. Like all economic agents, the government must manage its cash position. Chapter 2 considers this activity. Short-term financial requirements cause the government to solicit the market for bills not previously scheduled (Cash Management Bills). Using data from the US Treasury's Proprietary Domestic Finance Database, this chapter shows that these bills have higher costs than normal bills, suggesting that both Treasury and financial markets appreciate that demand is more inelastic for these instruments. In addition, this research identifies several factors that increase finance costs for Treasury in meeting short-term financial need. Chapter 3 explores location choices for generation investment in a re-regulated electricity market. Recently, there have been significant changes in the regulation of electricity in the State of California. These changes may affect generation investment behavior within the State, an important consideration for policy makers. This work identifies the impact of public sector regulatory change on private sector investment outcomes, by comparing the location and scope of electricity generation projects before and after two specific regulatory changes in air quality management and transmission tariff charges, while controlling for expected population growth patterns within the State. Significant changes in location preference are identified using factors for the northern and southern transmission zones, NP15 and SP15, the intermediate zone ZP26, and for areas outside of ISO control. Chapter 4 considers Disability Insurance and individual public pension investment accounts. Current debate on the Social Security Administration's long-term finance of benefits includes proposals for independent private investment via individual accounts. The author investigates

  5. Essays on numbers and figures

    CERN Document Server

    Prasolov, V V

    2000-01-01

    This is the English translation of the book originally published in Russian. It contains 20 essays, each dealing with a separate mathematical topic. The topics range from brilliant mathematical statements with interesting proofs, to simple and effective methods of problem-solving, to interesting properties of polynomials, to exceptional points of the triangle. Many of the topics have a long and interesting history. The author has lectured on them to students worldwide. The essays are independent of one another for the most part, and each presents a vivid mathematical result that led to current

  6. Scrapbook (a visual essay

    Directory of Open Access Journals (Sweden)

    Jonathan Carson

    2011-08-01

    Full Text Available

    Abstract: Working with a range of material (objects, ephemera, texts characteristic of a scrapbook, Carson & Miller will produce a visual essay that investigates the experience of reading such matter in this often underrated and undervalued form. In this context the notion of reading (and, subsequently re-reading and mis-reading will be utilised to explore the construction of narrative and the manner in which such narratives can present misleading, misinterpreted or inaccurate accounts of ‘things’. In doing so, such accounts can produce a multiplicity of new narratives.

                To develop this idea visually Carson & Miller will harness the tradition and format of a scrapbook. Scrapbooks imply the creative use of material which would be valued differently (or indeed undervalued in other contexts; the inclusion of scraps in the scrapbook claims that which is defined as ‘scrap’ as valuable and worthy of possession. In essence a scrapbook brings together disparate material and is often constructed according to its own internal ordering and logic; sometimes things are related by type, sometimes unlikely objects are combined or juxtaposed in fortuitous encounters. Such fortuitous encounters tell their own stories but also produce new narratives through generating new combinations of significance (Allmer iv.

  7. Essays in Education and Macroeconomics

    Science.gov (United States)

    Herrington, Christopher M.

    2013-01-01

    This dissertation consists of three essays on education and macroeconomics. The first chapter analyzes whether public education financing systems can account for large differences among developed countries in earnings inequality and intergenerational earnings persistence. I first document facts about public education in the U.S. and Norway, which…

  8. Essays on financial market integration

    NARCIS (Netherlands)

    Pungulescu, C.

    2009-01-01

    The four essays in this dissertation address these main questions and alternate a general perspective with focused analysis on specific measures of integration and regions, providing several novel answers. First, new relevant proxies are proposed to measure financial market integration. They give

  9. Essays on mergers and acquisitions

    NARCIS (Netherlands)

    Faelten, A.I.

    2016-01-01

    Essays on Mergers and Acquisitions" tackles some of the most prominent business challenges related to M&A activity. The Introduction examines the reasons why deals fail through well-known case studies; Chapter 1 presents a new index measuring countries M&A maturity worldwide; Chapter 2 focus on the

  10. Two Essays in Economic Education

    Science.gov (United States)

    Evans, Brent A.

    2013-01-01

    Prior researchers (Anderson et al. 1994; Ballard & Johnson 2004; Hoag & Benedict 2010) have shown that different math abilities do not equally correlate with success in economics, yet no research has specifically compared algebra and geometry skills as predictors of economics success. In the first essay, I find that students' standardized…

  11. Dance for two selected essays

    CERN Document Server

    Lightman, Alan

    1996-01-01

    The author of Einstein's Dreams now presents a collection of essays, written over the past 20 years, that displays his genius for bringing literary and scientific concerns into ringing harmony. Sometimes provocative, sometimes fanciful, always elegantly conceived and written, these meditations offer readers a fascinating look into the creative compulsions shared by the scientist and the artist. Reading tour.

  12. Essay Writing For Undergraduate And Postgraduate Medical ...

    African Journals Online (AJOL)

    The written examination in most medical examinations consists of long and/or short essays and multiple choice questions. The essays contain numerous questions on topical issues in the respective faculties and most times, all questions are compulsory.

  13. In Defense of the Formula Essay

    Science.gov (United States)

    Haluska, Jan Charles

    2007-01-01

    In 1970, the author learned a simple step in making essays from his advisor. His advisor used a drawing of the Parthenon to illustrate the creation of a five-paragraph essay. It was obvious that his advisor was hesitant on teaching them a very simple concept of essay writing because it was pretty mechanical. Like his advisor, a lot of teachers…

  14. Essays on liberalized energy markets

    International Nuclear Information System (INIS)

    Nese, Gjermund

    2003-01-01

    This thesis consists of four essays that aim at contributing to the understanding of some of the new challenges associated by the liberalized energy markets. More specifically the essays consider investments in energy generation projects; international trade of Green Certificates, market power in a Green Certificate system, and finally the behaviour of public firms in liberalized markets. Essay 1 considers energy investment, when a choice has to be made between fossil fuel and biomass fired production technologies. A dynamic model is presented to illustrate the effect of the different degrees of input price uncertainty on the choice of technology and the timing of the investment. It is shown that when the choice of technology is irreversible, it may be optimal to postpone the investment even if it would otherwise be optimal to invest in one or both of the plant types. We provide a numerical example based on cost estimates of two different power plant types. Essay 2 presents an analytical equilibrium model for simultaneously functioning international markets for electricity and Green Certificates is formulated. The percentage requirement is perceived as the policy instrument affecting the level of green electricity in end-use consumption. In none of the cases considered does an increase in the country's percentage requirement necessarily result in an increase in the generation of green electricity in that country, but it may have a positive effect on the trading partner's generation of green electricity. Further, under quite realistic assumptions, a country maximizes its generation of green electricity by setting the percentage requirement to zero. In essay 3 an analytic equilibrium model for a simultaneously functioning electricity market and a market for Green Certificates is formulated. The major focus of the paper is the effect of market power in a Green Certificate system. One of the main results is that the certificate system faced with market power may

  15. Essays on liberalized energy markets

    Energy Technology Data Exchange (ETDEWEB)

    Nese, Gjermund

    2003-07-01

    This thesis consists of four essays that aim at contributing to the understanding of some of the new challenges associated by the liberalized energy markets. More specifically the essays consider investments in energy generation projects; international trade of Green Certificates, market power in a Green Certificate system, and finally the behaviour of public firms in liberalized markets. Essay 1 considers energy investment, when a choice has to be made between fossil fuel and biomass fired production technologies. A dynamic model is presented to illustrate the effect of the different degrees of input price uncertainty on the choice of technology and the timing of the investment. It is shown that when the choice of technology is irreversible, it may be optimal to postpone the investment even if it would otherwise be optimal to invest in one or both of the plant types. We provide a numerical example based on cost estimates of two different power plant types. Essay 2 presents an analytical equilibrium model for simultaneously functioning international markets for electricity and Green Certificates is formulated. The percentage requirement is perceived as the policy instrument affecting the level of green electricity in end-use consumption. In none of the cases considered does an increase in the country's percentage requirement necessarily result in an increase in the generation of green electricity in that country, but it may have a positive effect on the trading partner's generation of green electricity. Further, under quite realistic assumptions, a country maximizes its generation of green electricity by setting the percentage requirement to zero. In essay 3 an analytic equilibrium model for a simultaneously functioning electricity market and a market for Green Certificates is formulated. The major focus of the paper is the effect of market power in a Green Certificate system. One of the main results is that the certificate system faced with market power

  16. Essays in Empirical Asset Pricing

    DEFF Research Database (Denmark)

    Rzeznik, Aleksandra

    This thesis consists of three essays investigating financial and real estate markets and identifying a relationship between them. A 2008 financial crises provides a perfect example of sizeable interactions between US housing market and equity prices, where a negative shock to house prices trigger...... a word-wide recession. Therefore, understanding forces driving investors behaviour and preferences, which in turn affect asset prices in both equity and housing market are of great interest....

  17. Essays on Cooperation and Competition

    Science.gov (United States)

    1990-01-01

    Economics in Honor of Oskar Morgenstern . Bibliographisches Institute Manheim. Wein, Zurich. 1981. Axelrod, Robert. "A Report on the Computer Tournament...Economics in Honor of Oskar Morgenstern . Bibliographisches Institute:Manheim, 1981, pp. 1 1-42. Axelrod, Robert. The Evolution of Cooperation. New York...Robert J. "Survey of Repeated Games." Essays in Game Theory and Mathematical Economics in Honor of Oskar Morgenstern . Bibliographisches

  18. Three Essays on Development Economics

    OpenAIRE

    Nakagawa, Hideyuki

    2013-01-01

    This dissertation presents three self-contained essays on topics of development economics in the context of rural villages in Bangladesh. The first paper examines how availability of microfinance influences households’ borrowing from informal sources in village economies. It uses a unique household level panel data set, which spans more than two decades (1987–2008), from rural Bangladesh. We find that households’ access to microfinance reduces the incidence of borrowing from informal sourc...

  19. Essay

    Science.gov (United States)

    Xu, Shuping

    2018-05-01

    Professor Yukihiro Ozaki has made great impacts in the spectroscopy communities all over the world. Throughout his career, he has established strong collaborations and communications with scientists from Asian countries, which solidified his grand academic stature in the field of molecular spectroscopy. In the past years, he has been pushing forward the development of spectroscopy in many Asian countries, particularly to China. Since his first trip to China in 1994, he has visited China almost 40 times. Under his continuous efforts during these years, deep and long-term collaborations with several universities and research institutes in China were established. Prof. Ozaki was endowed with honorary professorships in numerous institutes and universities in China including Jilin University and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. He has been a visiting professor of many Chinese universities including Shanghai JiaoTong University, Hunan University, Central South University, Peking University, East China Normal University, and Beijing University of Chemical Technology. Great friendships have been established between him and his Chinese colleagues as a result of mutual respect and common scientific interests. Prof. Ozaki is an expert in various facets of spectroscopy including two-dimensional correlation spectroscopy, polymer material science, deep-UV and near infrared spectroscopy, chemometrics, and surface-enhanced Raman spectroscopy. Over the past decades, Prof. Ozaki has contributed greatly to training the Chinese youth scientists: 11 doctoral students, 16 post-doctoral researchers and 9 guest-professors and 17 visiting scholars from China have been studied/worked in his research group. He is not only a historical witness for the development of molecular spectroscopy in China, but also a creator. He has served on the editorial board of several Chinese journals such as the Journal of Light Scattering, Spectroscopy and Spectral Analysis, Journal of Near Infrared and Millimeter Waves, etc. He has coauthored more than 200 publications with Chinese researchers. Owing to his great contributions to the spectroscopy research of China, Prof. Ozaki has been awarded Changbai Mountain Friendship Award, the highest honor from Jilin Province, China in 2010 and China Friendship Award on Molecular Spectroscopy, from the Chinese Optical Society in 2016. Prof. Ozaki is a trustworthy and respected mentor, as well as a meritorious friend for Chinese spectroscopic scientists. His outstanding contributions to the field of spectroscopy in China is already a shining hallmark to Prof. Ozaki's career and will be remembered by all who follow.

  20. Cross-cultural adaptation and measurement properties testing of the Iconographical Falls Efficacy Scale (Icon-FES).

    Science.gov (United States)

    Franco, Marcia Rodrigues; Pinto, Rafael Zambelli; Delbaere, Kim; Eto, Bianca Yumie; Faria, Maíra Sgobbi; Aoyagi, Giovana Ayumi; Steffens, Daniel; Pastre, Carlos Marcelo

    2018-02-14

    The Iconographical Falls Efficacy Scale (Icon-FES) is an innovative tool to assess concern of falling that uses pictures as visual cues to provide more complete environmental contexts. Advantages of Icon-FES over previous scales include the addition of more demanding balance-related activities, ability to assess concern about falling in highly functioning older people, and its normal distribution. To perform a cross-cultural adaptation and to assess the measurement properties of the 30-item and 10-item Icon-FES in a community-dwelling Brazilian older population. The cross-cultural adaptation followed the recommendations of international guidelines. We evaluated the measurement properties (i.e. internal consistency, test-retest reproducibility, standard error of the measurement, minimal detectable change, construct validity, ceiling/floor effect, data distribution and discriminative validity), in 100 community-dwelling people aged ≥60 years. The 30-item and 10-item Icon-FES-Brazil showed good internal consistency (alpha and omega >0.70) and excellent intra-rater reproducibility (ICC 2,1 =0.96 and 0.93, respectively). According to the standard error of the measurement and minimal detectable change, the magnitude of change needed to exceed the measurement error and variability were 7.2 and 3.4 points for the 30-item and 10-item Icon-FES, respectively. We observed an excellent correlation between both versions of the Icon-FES and Falls Efficacy Scale - International (rho=0.83, pFisioterapia. Publicado por Elsevier Editora Ltda. All rights reserved.

  1. Importância da tomografia de córnea para o diagnóstico de ectasia

    Directory of Open Access Journals (Sweden)

    Bruno de Freitas Valbon

    2012-10-01

    Full Text Available OBJETIVO: Utilização da metodologia para interpretação da tomografia de córnea e segmento anterior para a detecção e diagnóstico de ectasia corneana. MÉTODOS: Descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam High Resolution - Oculus, Wetzlar,Germany; relato de 3 casos, demonstrando a importância da propedêutica no exame complementar, através do Pentacam HR®. CONCLUSÃO: Nossa experiência compatibiliza-se com os relatos de literatura na demonstração do incremento de sensibilidade e especificidade para a detecção precoce de susceptibilidade e diagnóstico de ectasia corneana, utilizando a tomografia de córnea e segmento anterior.

  2. Art and Pornography: Philosophical Essays

    OpenAIRE

    2012-01-01

    Art and Pornography presents a series of essays\\ud which investigate the artistic status and aesthetic\\ud dimension of pornographic pictures, films, and\\ud literature, and explores the distinction, if there is\\ud any, between pornography and erotic art. Is there\\ud any overlap between art and pornography, or are\\ud the two mutually exclusive? If they are, why is\\ud that? If they are not, how might we characterize\\ud pornographic art or artistic pornography, and how\\ud might pornographic art b...

  3. A philosophical essay on probabilities

    CERN Document Server

    Laplace, Marquis de

    1996-01-01

    A classic of science, this famous essay by ""the Newton of France"" introduces lay readers to the concepts and uses of probability theory. It is of especial interest today as an application of mathematical techniques to problems in social and biological sciences.Generally recognized as the founder of the modern phase of probability theory, Laplace here applies the principles and general results of his theory ""to the most important questions of life, which are, in effect, for the most part, problems in probability."" Thus, without the use of higher mathematics, he demonstrates the application

  4. Essays on investment and house prices

    OpenAIRE

    Tran, Thang Long

    2017-01-01

    This thesis combines four related essays that examine investment activities and housing dynamics in Australia. The first essay investigates the key drivers of Australian aggregate business investment. Tobin’s q, income, cash flow and uncertainty impacts on investment are determined and disentangled. Uncertainty and demand constraints are revealed to be highly significant for investment over business cycle frequencies. The second essay examines the firm-level investment determinants of listed ...

  5. Essays on public policy and private incentives

    OpenAIRE

    Kjerstad, Egil

    2001-01-01

    The main question asked in this thesis is how market-based governance structures influence the resource utilisation in public sector. The four essays are predominately occupied with policy issues. For instance, all essays are inspired by public sector reforms implemented across OECD member states during the last ten to fifteen years. Three out of four essays are applied econometric work concerned with analysing and describing effects of reforms made in the health care and social care sectors....

  6. Essays on Schools, Crime, and Punishment

    OpenAIRE

    Shollenberger, Tracey Lynn

    2015-01-01

    This dissertation consists of three essays on schools, crime, and punishment. The first essay — stemming from collaborative work with Christopher Jencks, Anthony Braga, and David Deming — uses longitudinal school and arrest records to examine the long-term effects of winning the lottery to attend one's first-choice high school on students' arrest outcomes in the Boston Public Schools. The second essay uses quasi-experimental regression and matching techniques to examine the effect of out-of-...

  7. Mudanças na estrutura do solo avaliada com uso de tomografia computadorizada.

    OpenAIRE

    PIRES, L. F.; BACCHI, O. O. S.

    2010-01-01

    O objetivo deste trabalho foi avaliar, em escala milimétrica, a modificação da densidade e da porosidade de amostras deformadas de solo submetidas a ciclos de umedecimento e secamento (U-S), por meio da tomografia computadorizada de raios gama. Amostras com 98,1 cm³ foram preparadas procedendo ao peneiramento do solo em malha de 2 mm e acondicionamento de forma homogênea em tubos de PVC. As amostras de solo foram submetidas a um, dois e três ciclos de U-S. As amostras controle não foram subme...

  8. Linfangiectasia renal: achado incidental em tomografia computadorizada multicorte e revisão da literatura

    Directory of Open Access Journals (Sweden)

    Rodrigo Abdalla de Vasconcelos

    2012-06-01

    Full Text Available Linfangiectasia renal é uma condição rara, caracterizada por coleções parapiélicas e perirrenais, que pode progredir de assintomática para insuficiência renal crônica. É apresentado um caso de achado incidental em tomografia computadorizada de linfangiectasia renal bilateral em paciente assintomático, com descrição dos principais achados à luz dos métodos de imagem e ampla revisão da literatura.

  9. Constitution 200: A Bicentennial Collection of Essays.

    Science.gov (United States)

    Hepburn, Mary A., Ed.; And Others

    Constitutional essays which formed the basis of public assemblies throughout three states are compiled in this book. The first three essays consider the U.S. government principles of federalism, judicial review, and the separation of powers. Michael L. Benedict proposes that the question of ultimate sovereignty has been answered differently by…

  10. Essays on financial structure and macroeconomic performance

    NARCIS (Netherlands)

    Zhu, D.

    2006-01-01

    In addressing the matter, two essays study the effects of the debt vs. equity dimension of the financial structure on international consumption smoothing and macroeconomic volatility (in particular, economic downturns). Another essay evaluates the role of informal financial institution by looking

  11. Essays on incentives in regulation and innovation

    NARCIS (Netherlands)

    Jansen, J.A.

    2000-01-01

    The thesis contains three essays on incentives in regulation and innovation. The first essay analyzes a problem of optimal regulatory design. Key feature of the problem is that there exists asymmetric information between the regulator and the industry concerning the costs of producing complementary

  12. Essays on Customization Applications in Marketing

    NARCIS (Netherlands)

    Adiguzel, Feray

    2006-01-01

    The primary objective of this thesis is to develop and validate new methodologies to improve the collection of data and the effectiveness of promotion customization. This thesis contains two essays. In these essays, we search for optimal combinations of components of questionnaires to design split

  13. Technical Report on Alberta Essay Scales: Models.

    Science.gov (United States)

    Nyberg, Verner R.; Nyberg, Adell M.

    The supplementary information on "Alberta Essay Scales: Models" presented here includes similar models to employ in grading essays, the background and development of the scales, and the rationale for developing two scales of English mechanics and style/content. A standard is presented for evaluating current writing achievement by…

  14. Audiotape Feedback for Essays in Distance Education

    NARCIS (Netherlands)

    Kirschner, P.A.; Brink, H. van den; Meester, M.

    1991-01-01

    Students who were required to write three short essays for a university level course on photochemistry at the Open university of the Netherlands received either audio-cassette or written feedback on their essays. The students receiving the audio feedback described their experience as personal,

  15. Essays in financial reporting, tax, and politics

    NARCIS (Netherlands)

    Janssen, W.H.P.

    2015-01-01

    This dissertation contains three essays on financial reporting, tax, and politics. The first essay explores whether the tax authority is able to generate spillover effects for auditors. The IRS can generate spillover effects for auditors, as a strong IRS increases manager’s incentives to comply with

  16. Essays on La Mujer. Anthology No. 1.

    Science.gov (United States)

    Sanchez, Rosaura, Ed.; Cruz, Rosa Martinez, Ed.

    The 10 essays introduce some concepts and topics of particular concern and interest to those wishing to analyze the situation of the Chicana within her particular historical, social and economical context. Topics of the essays are: (1) the Chicana labor force; (2) the role of the Chicana within the student movement; (3) the Chicana and the Chicano…

  17. O valor da tomografia computadorizada helicoidal sem contraste na avaliação de pacientes com dor no flanco

    Directory of Open Access Journals (Sweden)

    Galvão Filho Mário de Melo

    2001-01-01

    Full Text Available Os nossos objetivos foram estabelecer a eficácia da tomografia computadorizada sem contraste em diagnosticar a ureterolitíase, calcular a freqüência dos principais sinais tomográficos e medir a concordância interobservador, comparando-a com os resultados obtidos na urografia excretora, realizando estudo prospectivo duplo-cego em 25 pacientes com cólica nefrética. Em ambos os procedimentos avaliamos a existência de aumento renal, hidronefrose e cálculo ureteral. Deste último, descrevemos a sua localização e dimensão. Nos exames de tomografia computadorizada sem contraste procuramos também por estrias perirrenais, edema periureteral e o sinal do halo. Em 23 dos 25 exames de tomografia computadorizada sem contraste (92% e em 17 das 25 urografias excretoras (68% houve concordância dos resultados entre os dois observadores. Em 21 dos 25 pacientes os resultados dos dois métodos foram concordantes. Concluímos que a tomografia computadorizada sem contraste apresenta eficácia superponível à urografia excretora na avaliação de pacientes com cólica nefrética, sendo um método reprodutível e sem promover o desconforto do uso do contraste endovenoso.

  18. Apendicite epiplóica: aspectos na ultra-sonografia e na tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Melo Alessandro Severo Alves de

    2002-01-01

    Full Text Available A apendicite epiplóica é uma condição inflamatória incomum, porém cada vez mais freqüentemente diagnosticada pelos métodos de imagem atuais (tomografia computadorizada e ultra-sonografia, os quais possibilitam a adoção de conduta terapêutica não-invasiva e eficiente. Os autores estudaram seis casos de apendicite epiplóica por meio de tomografia computadorizada, que mostraram lesões ovaladas de 1 a 2 cm de diâmetro, de localização paracólica, com atenuação de gordura e pequena lâmina hiperdensa periférica com gordura marginal peritoneal espessada. Dois desses pacientes foram submetidos a ultra-sonografia, que demonstrou formações expansivas hiperecóicas, de aspecto ovóide, não compressíveis, localizadas sob o sítio de maior sensibilidade do abdome.

  19. Essays on the theory of numbers

    CERN Document Server

    Dedekind, Richard

    1963-01-01

    Two classic essays by great German mathematician: one provides an arithmetic, rigorous foundation for the irrational numbers, the other is an attempt to give the logical basis for transfinite numbers and properties of the natural numbers.

  20. Transforming the Reserve Component: Four Essays

    National Research Council Canada - National Science Library

    Binnendijk, Hans; Baranick, Michael J; Bell, Raymond E., Jr; Cordero, Gina; Duncan, Stephen M; Holshek, Christopher; Wentz, Larry

    2005-01-01

    This volume contains four essays on various aspects of the Reserve Component. We publish it at a time when Reserves are serving overseas at historically high rates and when new missions like homeland security demand their attention...

  1. Tomografia computadorizada do cranio no diagnostico dos meningiomas: registro de 16 casos

    Directory of Open Access Journals (Sweden)

    James Pitagoras de Mattos

    1983-03-01

    Full Text Available Os autores se referem à importância do emprego da tomografia computadorizada do crânio para o preciso diagnóstico dos meningiomas. Constam da experiência 16 casos, comprovados cirúrgica e histologicamente. A média de idade foi de 52,1 anos, sendo 10 pacientes do sexo feminino e 6 do masculino. Quanto à localização, 5 eram da cavidade orbitrária e/ou asa do esfenóide, 3 parasagitais, 3 da foice, 2 supra-selares, 2 de convexidade e 1 do tentório. Concluem tratar-se de exame de grande positividade (95-98%, praticamente inócuo e que permite, na atualidade, o diagnóstico precoce conduzindo, consequentemente, a melhores resultados terapêuticos.

  2. A tomografia computadorizada na avaliação do comprometimento abdominal na paracoccidioidomicose

    Directory of Open Access Journals (Sweden)

    Roberto Martinez

    1988-06-01

    Full Text Available A tomografia computadorizada foi utilizada para avaliar o comprometimento abdominal em 25 doentes deparacoccidioidomicose. Existiam lesões intra-abdominais em, respectivamente, 75%e23% dos doentes com asformas aguda ("juvenil" e crônica ( do adulto '. A alteração mais freqüente foi o aumento dos gânglios linfáticos abdominais (12/25 casos; outras lesões foram: calcificação de gânglios linfáticos em 4 casos; obstrução das vias biliares em 5 doentes ictéricos; abscessos ou calcificação esplénica em 3 casos; 2 doentes mostraram lesões incomuns: aumento e irrgularidade do pâncreas em um e múltiplos abscessos nos músculos psoas em outro. Conclui-se que a tomografia computadorizada é procedimento útil na avaliação da disseminação da paracoccidioidomicose ao abdome e no diagnóstico de suas complicações abdominais.Computerised tomography was utilized in 25 paracoccidioidomycosis patients to evaluate abdominal involvement. This was observed in patients, 75% of acute (juvenile type and 23% of chronic (adult type patients. The most frequent alteration was abdominal lymphnode enlargement (12/25 cases. Other lesions consisted of lymphnode calcification in 4 cases, biliary tract obstruction in 5 icteric patients, splenic abscess or calcification in 3 cases. Two patients had unusual lesions: one with pancreatic enlargement and irregularity and other with multiple abscesses in both psoas muscles. It was concluded that computerised tomography is a useful procedure for evaluating paracoccidioidomycosis dissemination to the abdomen and for the diagnosis of its abdominal complications.

  3. Empirical essays on energy economics

    Energy Technology Data Exchange (ETDEWEB)

    Thoenes, Stefan

    2013-06-13

    The main part of this thesis consists of three distinct essays that empirically analyze economic issues related to energy markets in the United States and Europe. The first chapter provides an introduction and discusses the motivation for the different analyses pursued in this thesis. The second chapter examines attention effects in the market for hybrid vehicles. We show that local media coverage, gasoline price changes and unprecedented record gasoline prices have a significant impact on the consumers' attention. As attention is not directly observable, we analyze online search behavior as a proxy for the revealed consumer attention. Our study is based on a unique weekly panel dataset for 19 metropolitan areas in the US. Additionally, we use monthly state-level panel data to show that the adoption rate of hybrid vehicles is robustly related to our measure of attention. Our results show that the consumers' attention fluctuates strongly and systematically. The third chapter shows how the effect of fuel prices varies with the level of electricity demand. It analyzes the relationship between daily prices of electricity, natural gas and carbon emission allowances with a semiparametric varying smooth coefficient cointegration model. This model is used to analyze the market impact of the nuclear moratorium by the German Government in March 2011. Futures prices of electricity, natural gas and emission allowances are used to show that the market efficiently accounts for the suspended capacity and correctly expects that several nuclear plants will not be switched on after the moratorium. In the fourth chapter, we develop a structural vector autoregressive model (VAR) for the German natural gas market. In particular, we illustrate the usefulness of our approach by disentangling the effects of different fundamental influences during four specific events: The financial crisis starting in 2008, the Russian-Ukrainian gas dispute in January 2009, the Libyan civil war

  4. Two Essays in Financial Economics

    Science.gov (United States)

    Putnam, Kyle J.

    The following dissertation contains two distinct empirical essays which contribute to the overall field of Financial Economics. Chapter 1, entitled "The Determinants of Dynamic Dependence: An Analysis of Commodity Futures and Equity Markets," examines the determinants of the dynamic equity-commodity return correlations between five commodity futures sub-sectors (energy, foods and fibers, grains and oilseeds, livestock, and precious metals) and a value-weighted equity market index (S&P 500). The study utilizes the traditional DCC model, as well as three time-varying copulas: (i) the normal copula, (ii) the student's t copula, and (iii) the rotated-gumbel copula as dependence measures. Subsequently, the determinants of these various dependence measures are explored by analyzing several macroeconomic, financial, and speculation variables over different sample periods. Results indicate that the dynamic equity-commodity correlations for the energy, grains and oilseeds, precious metals, and to a lesser extent the foods and fibers, sub-sectors have become increasingly explainable by broad macroeconomic and financial market indicators, particularly after May 2003. Furthermore, these variables exhibit heterogeneous effects in terms of both magnitude and sign on each sub-sectors' equity-commodity correlation structure. Interestingly, the effects of increased financial market speculation are found to be extremely varied among the five sub-sectors. These results have important implications for portfolio selection, price formation, and risk management. Chapter 2, entitled, "US Community Bank Failure: An Empirical Investigation," examines the declining, but still pivotal role, of the US community banking industry. The study utilizes survival analysis to determine which accounting and macroeconomic variables help to predict community bank failure. Federal Deposit Insurance Corporation and Federal Reserve Bank data are utilized to compare 452 community banks which failed between

  5. Empirical essays on energy economics

    International Nuclear Information System (INIS)

    Thoenes, Stefan

    2013-01-01

    The main part of this thesis consists of three distinct essays that empirically analyze economic issues related to energy markets in the United States and Europe. The first chapter provides an introduction and discusses the motivation for the different analyses pursued in this thesis. The second chapter examines attention effects in the market for hybrid vehicles. We show that local media coverage, gasoline price changes and unprecedented record gasoline prices have a significant impact on the consumers' attention. As attention is not directly observable, we analyze online search behavior as a proxy for the revealed consumer attention. Our study is based on a unique weekly panel dataset for 19 metropolitan areas in the US. Additionally, we use monthly state-level panel data to show that the adoption rate of hybrid vehicles is robustly related to our measure of attention. Our results show that the consumers' attention fluctuates strongly and systematically. The third chapter shows how the effect of fuel prices varies with the level of electricity demand. It analyzes the relationship between daily prices of electricity, natural gas and carbon emission allowances with a semiparametric varying smooth coefficient cointegration model. This model is used to analyze the market impact of the nuclear moratorium by the German Government in March 2011. Futures prices of electricity, natural gas and emission allowances are used to show that the market efficiently accounts for the suspended capacity and correctly expects that several nuclear plants will not be switched on after the moratorium. In the fourth chapter, we develop a structural vector autoregressive model (VAR) for the German natural gas market. In particular, we illustrate the usefulness of our approach by disentangling the effects of different fundamental influences during four specific events: The financial crisis starting in 2008, the Russian-Ukrainian gas dispute in January 2009, the Libyan civil war in 2011 as

  6. Essays on incomplete contracts in regulatory activities

    Science.gov (United States)

    Saavedra, Eduardo Humberto

    This dissertation consists of three essays. The first essay, The Hold-Up Problem in Public Infrastructure Franchising, characterizes the equilibria of the investment decisions in public infrastructure franchising under incomplete contracting and ex-post renegotiation. The parties (government and a firm) are unable to credibly commit to the contracted investment plan, so that a second step investment is renegotiated by the parties at the revision stage. As expected, the possibility of renegotiation affects initial non-verifiable investments. The main conclusion of this essay is that not only underinvestment but also overinvestment in infrastructure may arise in equilibrium, compared to the complete contracting case. The second essay, Alternative Institutional Arrangements in Network Utilities: An Incomplete Contracting Approach, presents a theoretical assessment of the efficiency implications of privatizing natural monopolies which are vertically related to potential competitive firms. Based on the incomplete contracts and asymmetric information paradigm. I develop a model that analyzes the relative advantages of different institutional arrangements---alternative ownership and market structures in the industry--- in terms of their allocative and productive efficiencies. The main policy conclusion of this essay is that both ownership and the existence of conglomerates in network industries matter. Among other conclusions, this essay provides an economic rationale for a mixed economy in which the network is public and vertical separation of the industry when the natural monopoly is under private ownership. The last essay, Opportunistic Behavior and Legal Disputes in the Chilean Electricity Sector, analyzes post-contractual disputes in this newly privatized industry. It discusses the presumption that opportunistic behavior and disputes arise due to inadequate market design, ambiguous regulation, and institutional weaknesses. This chapter also assesses the presumption

  7. TRAINING OF LEARNING STRATEGIES IN WRITING ESSAY

    Directory of Open Access Journals (Sweden)

    Agus Edi Winarto

    2015-11-01

    Full Text Available Writing essay is still considered difficult for English students to master. The students are expected to be able to express their ideas correctly without making any chance of messages to be misinterpreted by the readers; therefore, they have to know and use the best or the most appropriate ways to write. The purpose of writing this article is to introduce learning strategies and the possibility of training of learning strategies in writing essay to English students. The first strategy is integration of strategy with the process of writing essay: pre-writing, writing draft, and post-writing activities. The second is training learning strategies, such as memory, cognitive, compensation, metacognitive, affective, and social strategies to students to make writing essay easier, faster, more enjoyable, more effective, and more self-directed to achieve the desired result in their writing. To get better result of improvement, the model of training of learning strategies in writing essay should be applied and developed based on the appropriateness of teachers, learners, subjects, and situations.

  8. Three essays on auction markets

    Science.gov (United States)

    Shunda, Nicholas James

    This dissertation contains a series of theoretical investigations of auction markets. The essays it contains cover wholesale electricity markets, a popular selling mechanism on eBay, and supplier entry into multi-unit procurement auctions. The study in Chapter 1 compares the procurement cost-minimizing and productive efficiency performance of the auction mechanism used by independent system operators in wholesale electricity auction markets in the U.S. with that of a proposed alternative. The current practice allocates energy contracts as if the auction featured a discriminatory final payment method when, in fact, the markets are uniform price auctions. The proposed alternative explicitly accounts for the market-clearing price during the allocation phase. We find that the proposed alternative largely outperforms the current practice on the basis of procurement costs in the context of simple auction markets featuring both day-ahead and real-time auctions and that the procurement cost advantage of the alternative is complete when we simulate the effects of increased competition. We also find that a tradeoff between the objectives of procurement cost minimization and productive efficiency emerges in our simple auction markets and persists in the face of increased competition. The study in Chapter 2 considers a possible rationale for an auction with a buy price. In an auction with a buy price, the seller provides bidders with an option to end the auction early by accepting a transaction at a posted price. The "Buy-It-Now" option on eBay is a leading example of an auction with a buy price. The study develops a model of an auction with a buy price in which bidders use the auction's reserve price and buy price to formulate a reference price. The model both explains why a revenue-maximizing seller would want to augment her auction with a buy price and demonstrates that the seller sets a higher reserve price when she can affect the bidders' reference price through the

  9. Essays on Macroeconomics and Oil

    Science.gov (United States)

    Cakir, Nida

    In these essays, I examine (i) the empirical methods that are widely used in the literature to measure total factor productivity growth and (ii) the impact of nationalization on productivity in the oil industry. The first chapter, which is an ongoing work with SHI, Wei, investigates two empirical measures, quantity-based (primal) measure and price-based (dual) measure, of total factor productivity growth. My co-author and I analyze how these two measures are affected by output market imperfection or variable capacity utilization. We find that under constant-returns-to-scale production function assumption, existence of the imperfect competition in the output market creates a gap between the measured TFP growth and the true TFP growth, no matter which method is used. However, theoretically, it does not affect the equivalence between the two measures. Under variable capacity utilization, we show that constant-returns-to-scale assumption is almost enough to guarantee the validity of the two methods in correctly capturing the true TFP growth. In the second and third chapters, I analyze the link between nationalization and productivity. The second chapter documents the trends in expropriation acts, and evaluates the impact of expropriations on labor productivity of resource-rich developing countries in the oil industry. In the first part of this chapter, I investigate the trends in the expropriation acts that took place in 102 developing countries during the period 1922-2006. I find that more than half of the acts occurred between 1970 and 1976, there has been an increase in the number of expropriations in recent years, and the extractive sector including petroleum is more likely to be expropriated. Motivated by these facts, in the second part, I examine the oil industry in a period of widespread expropriations, the 1970s. In a sample of major oil-producing countries including OPEC and non-OPEC members, I show that losses in relative labor productivity after

  10. Carcinoma de células transicionais do trato urinário: aspectos da tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Almeida Junior José Guiomar de

    2003-01-01

    Full Text Available Embora relativamente incomum, o carcinoma de células transicionais do trato urinário é o segundo tumor mais freqüente do rim. Neste trabalho foram analisadas, de forma retrospectiva, as tomografias computadorizadas de dez pacientes com carcinoma de células transicionais confirmado por exame histopatológico. A bexiga foi acometida em 60% dos casos, o sistema pielocalicinal em 60% e o ureter em 10% deles. Lesões sincrônicas estiveram presentes em 40% das vezes. Os aspectos encontrados foram lesões vegetantes, espessamento da parede do ureter e lesões infiltrativas do rim. Foram descritos dois casos de tumores calcificados e um carcinoma de células transicionais surgindo no interior de um divertículo de bexiga. A tomografia computadorizada detectou extensão local do tumor em 80% dos pacientes e lesão a distância em 20%. A tomografia computadorizada permitiu caracterizar a extensão da doença, localmente e a distância, possibilitando que um grupo selecionado de pacientes pudesse ser tratado de forma conservadora.

  11. Ressonância magnética na endometriose pélvica profunda: ensaio iconográfico Magnetic resonance imaging in deep pelvic endometriosis: iconographic essay

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Coutinho Junior

    2008-04-01

    Full Text Available A endometriose caracteriza-se pela presença de tecido endometrial funcionante heterotópico. Em pacientes com endometriose pélvica profunda pode haver acometimento dos ligamentos útero-sacros, reto, septo retovaginal, vagina ou bexiga. Os sintomas podem ser variados e incluem dor pélvica, dismenorréia, dispareunia, sintomas urinários e infertilidade. O padrão-ouro para o tratamento é a ressecção completa dessas lesões. Assim, é muito importante a avaliação pré-operatória dessas pacientes, sendo esta avaliação, em geral, limitada em relação aos dados clínicos e ultra-sonográficos. A ressonância magnética tem grande importância no diagnóstico da endometriose, principalmente por permitir a identificação das lesões de permeio a aderências e a avaliação da extensão das lesões subperitoneais. Neste estudo são ilustrados, na forma de ensaio iconográfico, os principais achados da endometriose pélvica profunda à ressonância magnética.Endometriosis is characterized by the presence of normal endometrial tissue outside the uterine cavity. In patients with deep pelvic endometriosis, uterosacral ligaments, rectum, rectovaginal septum, vagina or bladder may be involved. Clinical manifestations may be variable, including pelvic pain, dysmenorrhea, dyspareunia, urinary symptoms and infertility. Complete surgical excision is the gold standard for treating this disease, and hence the importance of the preoperative work-up that usually is limited to an evaluation of sonographic and clinical data. Magnetic resonance imaging is of paramount importance in the diagnosis of endometriosis, considering its high accuracy in the identification of lesions intermingled with adhesions, and in the determination of peritoneal lesions extent. The present pictorial review describes the main magnetic resonance imaging findings in deep pelvic endometriosis.

  12. Essays on refining markets and environmental policy

    Science.gov (United States)

    Oladunjoye, Olusegun Akintunde

    This thesis is comprised of three essays. The first two essays examine empirically the relationship between crude oil price and wholesale gasoline prices in the U.S. petroleum refining industry while the third essay determines the optimal combination of emissions tax and environmental research and development (ER&D) subsidy when firms organize ER&D either competitively or as a research joint venture (RJV). In the first essay, we estimate an error correction model to determine the effects of market structure on the speed of adjustment of wholesale gasoline prices, to crude oil price changes. The results indicate that market structure does not have a strong effect on the dynamics of price adjustment in the three regional markets examined. In the second essay, we allow for inventories to affect the relationship between crude oil and wholesale gasoline prices by allowing them to affect the probability of regime change in a Markov-switching model of the refining margin. We find that low gasoline inventory increases the probability of switching from the low margin regime to the high margin regime and also increases the probability of staying in the high margin regime. This is consistent with the predictions of the competitive storage theory. In the third essay, we extend the Industrial Organization R&D theory to the determination of optimal environmental policies. We find that RJV is socially desirable. In comparison to competitive ER&D, we suggest that regulators should encourage RJV with a lower emissions tax and higher subsidy as these will lead to the coordination of ER&D activities and eliminate duplication of efforts while firms internalize their technological spillover externality.

  13. Essays on Legal and Illegal Immigration.

    Science.gov (United States)

    Pozo, Susan, Ed.

    Major issues of the debate that led to the passage of an immigration reform bill are discussed and analyzed in this collection of six papers that were delivered as public lectures at Western Michigan University during the 1984-85 academic year. The essays reflect a broad range of views on the effects of immigration on the United States economy and…

  14. essay writing for undergraduate and postgraduate medical

    African Journals Online (AJOL)

    Dr. E. P. Gharoro

    *E.E. Okpere, ** E.J. Enabudoso. *Chairman, Faculty of Obstetrics and Gynaecology, National Postgraduate. Medical College of Nigeria, **Editor, Benin Journal of Postgraduate Medicine. INTRODUCTION. The written examination in most medical examinations consists of long and/or short essays and multiple.

  15. Essays in empirical finance and monetary policy

    NARCIS (Netherlands)

    van Holle, Frederiek

    2017-01-01

    This dissertation consists of three essays. In the first paper, “Stock-Bond Correlations, Macroeconomic Regimes and Monetary Policy”, we link the evolution of stock-bond correlations for an international sample to both local and global regimes in inflation, the output gap and monetary policy. We

  16. Beyond the Five-Paragraph Essay

    Science.gov (United States)

    Campbell, Kimberly Hill

    2014-01-01

    Although using the five-paragraph formula to teach essay writing is a ubiquitous practice--and many K-12 teachers defend it--Campbell argues that having students write according to this formula does more harm than good. The formula's tight structure stops the very critical thinking students need to do to strengthen their cognition and their…

  17. A Small Essay About a Big Boulevard

    Directory of Open Access Journals (Sweden)

    Elena Grigoryeva

    2015-08-01

    Full Text Available The essay presents the analogies of turning city borders and walls into boulevards and gardens through the examples of Moscow and Irkutsk. The main street of Irkutsk is viewed in a new light, as a boulevard. It is proposed to take into consideration the peculiarities of the four sense-parts of the street when working on design codes.

  18. essay writing for undergraduate and postgraduate medical

    African Journals Online (AJOL)

    Dr. E. P. Gharoro

    E.E. Okpere, E.J. Enabudoso. 68 or listing is not adequate, and these are common causes of poor performance in the essays. Also, remember it is a clinical examination, and a clinical approach in your analysis is required. • Communication: no matter how up- to-date and comprehensive your factual knowledge is, or how.

  19. Perfusão miocárdica dinâmica por tomografia computadorizada de dupla fonte de raio X

    Directory of Open Access Journals (Sweden)

    José Rodrigues Parga Filho

    2012-03-01

    Full Text Available Relatamos caso de perfusão dinâmica e quantitativa pela tomografia computadorizada de múltiplos detectores de dupla fonte de Raio X em um paciente de 44 anos, com diagnóstico prévio de doença coronariana. A tomografia demonstrou quantitativamente déficit de perfusão miocárdica nos territórios irrigados por artérias com estenoses significativas confirmadas pela angiotomografia e pela cineangiocoronariografia. A tomografia computadorizada com dupla fonte de Raio X permitiu a avaliação dinâmica perfusional e anatômica, em um único estudo, durante o controle evolutivo desse paciente.

  20. The revelation(s of Asher Levi: An iconographic literacy event as a tool for the exploration of fragmented selves in new literacies studies after 9/11

    Directory of Open Access Journals (Sweden)

    Jeanine M. Staples

    2011-10-01

    Full Text Available This article considers the dynamics of an iconographic literacy event that functions as a tool for explorations of literacy practices and fragmented selves, particularly in relationship to the literate lives of marginalized individuals in the post 9/11 era. The author examines what happened when a group of 10 African American women in an urban area employed new literacies in the teaching/learning spaces of their personal lives (i.e. individual homes, familiar eateries, communicative digital technologies to explore and respond to stories in post 9/11 popular culture narratives. The study employed ethnographic methods (interviews, journaling, email and instant message writing and critical observations with members of the inquiry over the course of two years. The author investigated critically the meeting of biography, fiction and autoethnography as a literacy event used to couch the literacies and fragmented selves of these women in the post 9/11 era. Findings regarding the nature of their post 9/11 literacies, as expressed through fragmented selves, are shared, along with implications for new literacies research and teaching. Findings show that the women’s post 9/11 literacies include a range and variation of critical sensibilities that include, but are not limited to, multiple levels of sociolinguistic integration, sociocultural criticality and heightened awarenesses.

  1. Aristotle, De Memoria et Reminiscentia. Text, Translation and Interpretive Essays

    DEFF Research Database (Denmark)

    Bloch, David Kristian

    2006-01-01

    The dissertation analyses Aristotle's De Memoria et Reminiscentia. It contains an introduction, a critical edition accompanied by an English translation, an essay on Aristotle's own theories and an essay on the Aristotelian tradition.......The dissertation analyses Aristotle's De Memoria et Reminiscentia. It contains an introduction, a critical edition accompanied by an English translation, an essay on Aristotle's own theories and an essay on the Aristotelian tradition....

  2. Estimativa dos valores de MSAD em procedimentos de tomografia computadorizada utilizando filmes radiocrômicos

    Directory of Open Access Journals (Sweden)

    Bruno Beraldo Oliveira

    2013-04-01

    Full Text Available OBJETIVO: Verificar a viabilidade de filmes radiocrômicos como um dosímetro alternativo para estimativa da dose média em cortes múltiplos a partir dos perfis de kerma. MATERIAIS E MÉTODOS: Os filmes foram distribuídos em cilindros posicionados no centro e nas regiões periféricas de um objeto simulador padrão de abdome utilizado para dosimetria em tomografia computadorizada. RESULTADOS: Os valores de dose média em cortes múltiplos calculados foram 13,6 ± 0,7, 13,5 ± 0,7 e 18,7 ± 1,0 mGy para os valores de passo (pitch de 0,75, 1,00 e 1,50, respectivamente. CONCLUSÃO: Apesar de os resultados mostrarem valores menores que o nível de referência de radiodiagnóstico de 25 mGy estabelecido pela legislação brasileira para exames de abdome, eles sugerem que há espaço para otimização dos procedimentos e uma revisão do valor para o nível de referência de radiodiagnóstico brasileiro.

  3. Essays on Social Media Fundraising and E-Commerce

    Science.gov (United States)

    Tan, Xue

    2017-01-01

    This dissertation has two components: social media fundraising and e-commerce. The first component of social media fundraising discusses social media users' charitable content generation in essay 1 and charitable giving in essay 2. In essay 1, we examine how reciprocity of followees affects social influence on users' charitable content generation.…

  4. Conceptualizing Essay Tests' Reliability and Validity: From Research to Theory

    Science.gov (United States)

    Badjadi, Nour El Imane

    2013-01-01

    The current paper on writing assessment surveys the literature on the reliability and validity of essay tests. The paper aims to examine the two concepts in relationship with essay testing as well as to provide a snapshot of the current understandings of the reliability and validity of essay tests as drawn in recent research studies. Bearing in…

  5. Técnicas de aquisição rápida em tomografia por ressonância magnética nuclear

    OpenAIRE

    Bernd Uwe Foerster

    1994-01-01

    Neste trabalho apresentamos e comparamos diferentes técnicas de tomografia bidimensional por RMN implementados num sistema de tomografia de campo magnético ultra-baixo (O.05T). A partir da seqüência convencional \\"Spin Echo\\" (SE), utilizada rotineiramente, implementamos a seqüência \\"Gradient Recalled Echo\\" (GRE) e duas seqüências que utilizam o principio de Steady-State Free Precession (SSFP), sendo \\"Fast Low Angle Shot\\" (FLASH) e \\"Fast Acquisition Double Echo\\" (FADE). Com as seqüência...

  6. Ruptura traumática do diafragma: aspectos na tomografia computadorizada Traumatic diaphragmatic rupture: computed tomography findings

    Directory of Open Access Journals (Sweden)

    Alessandro Severo Alves de Melo

    2002-11-01

    Full Text Available A ruptura traumática do diafragma é uma condição incomum, porém cada vez mais freqüentemente diagnosticada pela tomografia computadorizada, especialmente pela técnica helicoidal associada às reconstruções multiplanares, possibilitando a adoção de conduta terapêutica cirúrgica rápida e eficiente. Os autores estudaram seis pacientes com ruptura traumática do diafragma submetidos a tomografia computadorizada, que demonstrou herniação de estruturas abdominais para o interior do tórax através de área de ruptura na hemicúpula frênica esquerda em quatro casos; os outros dois pacientes foram submetidos a procedimento cirúrgico por trauma abdominal associado, que demonstrou lesões diafragmáticas, sem evidência de herniação na tomografia computadorizada.Traumatic diaphragmatic rupture is an uncommon condition that has been diagnosed more frequently with the aid of computed tomography, particularly when using helical technique in association with multiplanar reconstructions. This technique allows adoption of an efficient and quick surgical therapeutic approach. The authors studied six patients with traumatic diaphragmatic rupture that were submitted to computed tomography. In four of the patients there was herniation of intraabdominal viscera through a site of rupture in the left diaphragm. The two other patients underwent surgery due to abdominal injuries, which revealed diaphragmatic lesions but no herniation of intraabdominal viscera.

  7. Essays in Education, Crime, and Job Displacement

    DEFF Research Database (Denmark)

    Bennett, Patrick

    problems in another area. As such, externalities and unexpected spillover effects impact the costs and benefits of public spending to society and may have large and meaningful implications on how to most effectively allocate resources across a multitude of outcomes. For example, an increase in education...... towards immigrants can impact their employment prospects which, in turn, impacts their decision to further pursue education. Identifying how these individual level factors have an impact on society is key to informing and designing effective public policy. This Ph.D. thesis, entitled “Essays in Education......, Crime, and Job Displacement”, analyzes the determinants and social implications of these three factors. While independent, each essay within this thesis examines the impact of factors such as education, in terms of reduced crime, job loss, in terms of increased crime, and discrimination, in terms of its...

  8. Essays on Asset Pricing with Financial Frictions

    DEFF Research Database (Denmark)

    Klingler, Sven

    The first essay focuses on Credit default swap (CDS) premiums of safe sovereigns, that is, the insurance against the default of countries with a low credit risk, like Germany, Japan, or the United States. We motivate the essay by establishing the following two stylized facts. First, we document...... insurance against the default of safe sovereigns? Second, what drives safe-haven CDS premiums if not credit risk?...... between bond yield and risk-free rate, for safe sovereigns. This finding is in opposition to the no-arbitrage theory that CDS premiums and yield spreads should move in lockstep. Motivated by these stylized facts, we investigate the following two questions: First, what are the motives behind purchasing...

  9. Essays on value creation in online marketplaces

    OpenAIRE

    Khern-am-nuai, Warut

    2016-01-01

    This dissertation consists of three essays that study the transformative impact of new information technologies under three specific contexts using both empirical and theoretical approaches. Chapter 2 examines the online review system, which is the new type of information technology that replaces the traditional word-of-mouth communication. Particularly, we study the practice of the platform owner that uses monetary incentives to attract reviewers. The research problem is important as firms, ...

  10. Essays in renewable energy and emissions trading

    Science.gov (United States)

    Kneifel, Joshua D.

    Environmental issues have become a key political issue over the past forty years and has resulted in the enactment of many different environmental policies. The three essays in this dissertation add to the literature of renewable energy policies and sulfur dioxide emissions trading. The first essay ascertains which state policies are accelerating deployment of non-hydropower renewable electricity generation capacity into a states electric power industry. As would be expected, policies that lead to significant increases in actual renewable capacity in that state either set a Renewables Portfolio Standard with a certain level of required renewable capacity or use Clean Energy Funds to directly fund utility-scale renewable capacity construction. A surprising result is that Required Green Power Options, a policy that merely requires all utilities in a state to offer the option for consumers to purchase renewable energy at a premium rate, has a sizable impact on non-hydro renewable capacity in that state. The second essay studies the theoretical impacts fuel contract constraints have on an electricity generating unit's compliance costs of meeting the emissions compliance restrictions set by Phase I of the Title IV SO2 Emissions Trading Program. Fuel contract constraints restrict a utility's degrees of freedom in coal purchasing options, which can lead to the use of a more expensive compliance option and higher compliance costs. The third essay analytically and empirically shows how fuel contract constraints impact the emissions allowance market and total electric power industry compliance costs. This paper uses generating unit-level simulations to replicate results from previous studies and show that fuel contracts appear to explain a large portion (65%) of the previously unexplained compliance cost simulations. Also, my study considers a more appropriate plant-level decisions for compliance choices by analytically analyzing the plant level decision-making process to

  11. Essays on tourism and its determinants

    OpenAIRE

    Ghalia, Thaana

    2016-01-01

    This thesis was submitted for the award of Doctor of Philosophy and was awarded by Brunel University London This thesis is based on four essays dealing with tourism development and its determinants. Chapter Two explores the different definitions of ‘tourism’ and ‘tourist’, as well as the factors that influence tourism arrivals. We discuss traditional and more recent theories that underlie the study of the tourism industry. The third chapter examines the effect of tourism upon economic grow...

  12. Essays on Cognitive Development and Medical Care

    OpenAIRE

    Öhman, Mattias

    2016-01-01

    This thesis consists of four self-contained papers. Essay I (with Linuz Aggeborn): Fluoridation of the drinking water is a public policy whose aim is to improve dental health. Although the evidence is clear that fluoride is good for dental health, concerns have been raised regarding potential negative effects on cognitive development. We study the effects of fluoride exposure through the drinking water in early life on cognitive and non-cognitive ability, education and labor market outcomes i...

  13. Spiritual exercises and parrhesia in Montaigne's Essays

    OpenAIRE

    Carneiro, AS

    2011-01-01

    In his late work Michel Foucault stressed the importance of parrhesia (libertas, franc-parler, frankness of speech) in the philosophical practices of the Anciens, through a broader reflection on "spirituality" inspired chiefly by the work of Pierre Hadot. The notion of parrhesia emerges as an interesting matter also in a approach of Montaigne's Essays, where we can recognize a series of "spiritual exercises", in the sense given to the expression by Hadot: practices, not only intellectual, int...

  14. Estudo do manto superior sob o Brasil Central utilizando tomografia sísmica de tempo de percurso

    OpenAIRE

    Azevedo, Paulo Araújo de

    2013-01-01

    Neste trabalho, apresentamos os resultados de tomografia sísmica de tempo de percurso utilizando ondas P no Brasil Central. Foram realizadas inversões para dados registrados durante os anos de 2008-2012 por 15 estações distribuídas na área de estudo. Além disso, esses dados foram incluídos no banco de dados utilizado por Rocha et al. (2011), a fim de melhorar a resolução das anomalias em algumas regiões dentro da área de estudo. O objetivo foi estudar o manto superior sob o Brasil Central, pr...

  15. Malária pulmonar: aspectos na tomografia computadorizada de alta resolução - relato de caso

    Directory of Open Access Journals (Sweden)

    Rodrigues Rosana

    2004-01-01

    Full Text Available Neste trabalho é relatado o caso de paciente do sexo masculino, de 38 anos de idade, que desenvolveu quadro de malária com comprometimento pulmonar. A tomografia computadorizada de alta resolução evidenciou espessamento de septos interlobulares e de bainhas peribroncovasculares, com áreas esparsas de atenuação em vidro fosco e de consolidações, além de derrame pleural bilateral, aspectos compatíveis com edema pulmonar. O paciente recebeu tratamento específico, evoluindo bem e tendo alta 11 dias após a internação.

  16. The Early (Feminist Essays of Victoria Ocampo

    Directory of Open Access Journals (Sweden)

    Doris Meyer

    1996-01-01

    Full Text Available This study examines the essays written by Ocampo between 1920 and 1934, prior to the time when she publicly voiced her adhesion to feminism and the rights of women in Argentine society. In these works from her Testimonios in which Ocampo struggles to find her voice as a female writer, the maleable essay serves her need to engage in discursive dialogues from the margins of the literary culture of her time. Both as a woman and a member of the oligarchy, she questions cultural assumptions and gender-based binary structures common among the male writers of her time, many of whom she knew personally. Using rhetorical strategies that show the self-reflexive and subversive nature of her writing, Ocampo reads and reinterprets these works from a parenthetical feminist perspective, contesting their intellectual and aesthetic biases. The active agency of the reader as writer in these early essays shows Ocampo's awareness of her own unorthodox subject position—alienated from the conventions of her class, her gender, her national culture and language. Her autobiographical musings and her engagement with literary modernity in the 1920s and 1930s reveal a woman who accepted the liabilities of articulating an autonomous self, both in a European and a Latin American context. The influence of family bonds and patriarchal morality decisively shaped, but did not ultimately control, the way Victoria Ocampo eventually defined herself as a feminist author.

  17. Essays on environmental policies, corruption, and energy

    Science.gov (United States)

    Baksi, Soham

    This thesis consists of four essays. The first essay looks at pollution taxation under capital mobility, and analyzes the role of pre-commitment by countries to their pollution tax rate. A polluting firm sells its product in two countries, and can locate and produce in a single country or in both countries. Due to the discrete-choice nature of the firm's location problem, the countries' welfare functions are discontinuous in their pollution tax rate. We show that when the countries cannot pre-commit to their pollution tax, the firm can still engender tax competition between them by strategically locating in both the countries. Moreover, pre-commitment pollution taxation may not be welfare improving for the countries, although it always makes the firm better off. The second essay studies the effect of liberalization on corruption. Corruptible inspectors enforce an environmental regulation on firms, and are monitored by an honest regulator. Liberalization not only increases the variety of goods and the marginal utility of accepting a bribe, but also puts pressure on the regulator to curb corruption. The interaction of these two effects can cause corruption to initially increase with liberalization, and then decrease beyond a threshold. Moreover, equilibrium corruption is lower when the regulator is able to pre-commit to her monitoring frequency. The third essay analyzes optimal labeling (information revelation) procedures for hidden attributes of credence goods. Consumers are heterogeneous in their preference for the hidden attribute, and producers can either self-label their products, or have them certified by a third party. The government can impose self or third-party labeling requirements on either the "green" or the "brown" producers. When corrupt producers can affix spurious labels, the government needs to monitor them. A mandatory self-labeling policy is shown to generally dominate mandatory third-party labeling. The fourth essay develops formulas for

  18. Trauma renal grau III com fístula urinária subestadiamento pela tomografia?

    Directory of Open Access Journals (Sweden)

    Bruno Abade

    2007-06-01

    Full Text Available O rim é órgão freqüentemente lesado em traumas abdominais fechados. As indicações para tratamento conservador do trauma renal fechado estão cada vez mais amplas. Uma das complicações, a coleção urinária perirrenal, pode ser tratada de forma expectante ou mesmo minimamente invasiva, como drenagem percutânea e/ou colocação de catéter ureteral (“Duplo J” endoscópica. Relatamos um caso neste contexto, no qual a tomografia computadorizada subestadiou o grau de lesão renal, não tendo identificado inicialmente a lesão de via excretora. O caso evoluiu satisfatoriamente após instituição de tratamento minimamente invasivo. Conclui-se que este subestadiamento pode ser minimizado através de cortes tomográficos mais finos e tardios (fase excretora, reduzindo, assim, a morbidade nesta comum afecção. ABSTRACT The kidney is commonly affected by blunt abdominal trauma. The indications for nonoperative treatment are expanding. One of the complications, the extravasation of urine from the excretory path, may be treated by watchful waiting or minimally invasive ways, such as percutaneus drainage and/or an endoscopic ureteral catheter (“Double J”. We report a case to exemplify this, where the computed tomography undergraduated the renal lesion, failing to initially identify the extravasation from the excretory path. The patient had a good outcome after the instiution of a minimally invasive treatment. We conclude that this undergraduation can be minimized by narrower and later (excretory phase slices on CT, diminishing the morbidity of this condition. Key-words: kidney/injuries, tomography X-ray computed.

  19. Tomografia cerebral computadorizada e esquizofrenia: revisão crítica da literatura

    Directory of Open Access Journals (Sweden)

    Carlos Von Krakauer Hübner

    1988-09-01

    Full Text Available Vários estudos sobre tomografia cerebral computadorizada (CT relatam alteração da estrutura cerebral em esquizofrenia. A grande variação da prevalência e da localização das anomalias pode estar relacionada à heterogenidade da amostra estudada, à escolha das medidas de CT ou ao uso de diferentes critérios diagnósticos. Apesar de alguns achados contraditórios, parece estabelecido que um subgrupo de pacientes esquizofrênicos apresenta atrofia cerebral discreta ou moderada; esse subgrupo se caracterizaria por apresentar cronicidade da doença, pior resposta ao tratamento neuroléptico e pela presença de outros sinais de disfunção cerebral difusa, como distúrbios neuropsicológicos, anormalidades no EEG e «soft signs» neurológicos. Sinais de atrofia na CT foram observados em pacientes esquizofrênicos jovens, no primeiro surto psicótico, indicando que o desenvolvimento das anomalias estruturais não é conseqüência do tratamento ou da cronicidade da doença. Nos diferentes estudos, pacientes com atrofia apresentaram menor carga genética (história familiar para a esquizofrenia e se observou com maior freqüência história de complicações na gestação, no parto e trauma craniano nos primeiros anos do desenvolvimento. Em face da possibilidade de que doentes esquizofrênicos com atrofia cerebral formem um subgrupo homogêneo quanto à clínica e à etiopatologia da doença, é importante identificar e estudar as alterações da CT e caracterizar esse subgrupo de pacientes.

  20. Tomografia Computadorizada de crânio em perícias criminais: uma grande aliada

    Directory of Open Access Journals (Sweden)

    Márcio Gleidson Ribeiro Dias

    2016-11-01

    Full Text Available O presente estudo trata-se de uma revisão descritiva da literatura sobre as principais vantagens da Tomografia Computadorizada (TC de crânio na área de Criminologia. Para a revisão literária foram utilizados artigos e dissertações recentes publicados entre 2007 e 2016, livros de imagenologia e medicina legal. A partir dos dados obtidos na revisão literária, nós realizamos uma descrição sobre a TC e sua evolução ao longo dos anos, suas vantagens e aplicações em perícias criminais. Destacamos a importância do laudo pericial, a responsabilidade do perito criminal, a fisiopatologia do trauma cranioencefálico e a sua relação com a violência urbana.Entre as vantagens da virtópsia em relação aos métodos tradicionais destacam-se a preservação do corpo, o arquivamento das imagens e a capacidade de identificação de vítimas através de imagens comparativas ante mortem e post mortem. Assim, a TC tem se tornado cada vez mais presente nas investigações criminais como uma tecnologia de baixo custo que é capaz de localizar, quantificar e evidenciar o trajeto de projéteis, auxiliando na identificação de cadáveres e causas da morte.

  1. Quando a fase de equilíbrio pode ser suprimida nos exames de tomografia computadorizada de abdome?

    Directory of Open Access Journals (Sweden)

    Priscila Silveira Salvadori

    2013-04-01

    Full Text Available OBJETIVO: Avaliar a necessidade de realização da fase de equilíbrio nos exames de tomografia computadorizada de abdome. MATERIAIS E MÉTODOS: Realizou-se estudo retrospectivo, transversal e observacional, avaliando 219 exames consecutivos de tomografia computadorizada de abdome com contraste intravenoso, realizados num período de três meses, com diversas indicações clínicas. Para cada exame foram emitidos dois pareceres, um avaliando o exame sem a fase de equilíbrio (primeira análise e o outro avaliando todas as fases em conjunto (segunda análise. Ao final de cada avaliação, foi estabelecido se houve mudança nos diagnósticos principais e secundários, entre a primeira e a segunda análise. Foi utilizada a extensão do teste exato de Fisher para avaliar a modificação dos diagnósticos principais (p 0,999. Com relação aos diagnósticos secundários, cinco exames (2,3% foram modificados. CONCLUSÃO: Para indicações clínicas como estadiamento tumoral, abdome agudo e pesquisa de coleção abdominal, a fase de equilíbrio não acrescenta contribuição diagnóstica expressiva, podendo ser suprimida dos protocolos de exame.

  2. Avaliação da reprodutibilidade da tomografia computadorizada no estadiamento da pancreatite aguda Reproducibility in the assessment of acute pancreatitis with computed tomography

    Directory of Open Access Journals (Sweden)

    Edison de Oliveira Freire Filho

    2007-12-01

    Full Text Available OBJETIVO: Medir a reprodutibilidade da tomografia computadorizada sem e com contraste na avaliação da gravidade da pancreatite aguda. MATERIAIS E MÉTODOS: Cinqüenta e um exames de tomografia computadorizada abdominal sem e com contraste de pacientes com pancreatite aguda foram analisados por dois radiologistas (observadores 1 e 2. Calculamos o índice morfológico pela tomografia computadorizada sem e com contraste, separadamente, e o índice de gravidade da tomografia computadorizada para pancreatite aguda. Medimos a reprodutibilidade intra- e interobservador da tomografia computadorizada através do índice kappa (kapa. RESULTADOS: Para a concordância interobservador obtivemos kapa de 0,666, 0,705, 0,648, 0,547 e 0,631 para índice morfológico sem e com contraste, presença de necrose pancreática, extensão da necrose pancreática e índice de gravidade da tomografia computadorizada, respectivamente. Para a concordância intra-observador dos observadores 1 e 2 obtivemos, respectivamente, kapa de 0,796 e 0,732 para o índice morfológico sem contraste; 0,725 e 0,802 para o índice morfológico com contraste; 0,674 e 0,849 para a presença de necrose pancreática; 0,606 e 0,770 para a extensão da necrose pancreática; e 0,801 e 0,687 para o índice de gravidade da tomografia computadorizada. CONCLUSÃO: O estadiamento da pancreatite aguda pela tomografia computadorizada por meio do índice morfológico e do índice de gravidade da tomografia computadorizada é um método bastante reprodutível. O não-uso do contraste não afeta a reprodutibilidade da tomografia computadorizada para o cálculo do índice morfológico.OBJECTIVE: To evaluate the reproducibility of unenhanced and contrast-enhanced computed tomography in the assessment of patients with acute pancreatitis. MATERIALS AND METHODS: Fifty-one unenhanced and contrast-enhanced abdominal computed tomography studies of patients with acute pancreatitis were blindly reviewed by two

  3. Three essays on human resource management

    OpenAIRE

    Avgoustaki, Argyro

    2012-01-01

    This thesis comprises three essays on human resource management. The first one studies the effect of on-the-job training on firm productivity using a micro-dataset of a large firm in Greece for the period 2005 to 2006. The data consist of daily observations on the productivity of the same workers tracked before, during, and after the receipt of training. Overall, the empirical findings show that after the implementation of on-the-job training, productivity improves by almost 6.5 percent. Resu...

  4. Cholestatic jaundice by malignant lesions: pictorial essay

    International Nuclear Information System (INIS)

    Santa Anna, Tatiana Kelly Brasileiro de; Santana, Alex Menezes; Rizzuto, Mauricio Soares; Chagas, Alessandro Rosa Rodrigues; Zuppani, Aguinaldo Cunha; Rezende, Marcelo Bruno; Viveiros, Marcelo de Melo

    2009-01-01

    Malignant obstructive jaundice is most commonly caused by cancer of pancreatic head, papilla tumor, cholangiocarcinoma and biliary obstruction induced by secondary lesions of the liver or lymph nodes. Patients usually present with weight loss, abdominal pain, jaundice and progressive increase of direct bilirubin, being essential the evaluation by imaging methods for the proper diagnosis, staging and therapeutic planning. This essay illustrates the imaging aspects of ultrasound and computed tomography - and in specific situations magnetic resonance cholangiography - of the major malignancies that lead to cholestatic jaundice. (author)

  5. Archives and societal provenance Australian essays

    CERN Document Server

    Piggott, Michael

    2012-01-01

    Records and archival arrangements in Australia are globally relevant because Australia's indigenous people represent the oldest living culture in the world, and because modern Australia is an ex-colonial society now heavily multicultural in outlook. Archives and Societal Provenance explores this distinctiveness using the theoretical concept of societal provenance as propounded by Canadian archival scholars led by Dr Tom Nesmith. The book's seventeen essays blend new writing and re-workings of earlier work, comprising the fi rst text to apply a societal provenance perspective to a national sett

  6. Essays on consequences of economic integration

    Science.gov (United States)

    Chintrakarn, Pandej

    2007-12-01

    Economic integration is a term used to describe how different aspects between economies are integrated. As economic integration increases, the barriers of trade between markets diminishes. The most integrated economy today, between independent nations, is the European Union and its euro zone. This dissertation consists of three essays which examine consequences of economic integration. The debate over the environmental consequences of free trade is not only quite heated, but also entails significant policy ramifications. Recently, cross-sectional analysis at the country level has made use of exogenous determinants of trade to identify the causal effect of trade on the environment, finding moderate evidence of a beneficial impact of expanded trade on environmental quality. Given the stakes involved, the first essay revisits this finding using subnational data on 'trade' flows across US states and several measures of pollution. Not only does the analysis shed further light on the debate at the international level, but also addresses a heretofore unexamined question: Does greater inter-regional commerce at the subnational level harm the environment? The findings are striking, providing further evidence against a negative environmental impact of trade for the majority of measures analyzed. However, several sources of heterogeneity arise that are noteworthy. The second essay investigates the effect of the euro on trade among EMU members. Using various semi-nonparametric methods based on matching, the results suggest that the euro has a statistical and economic impact on trade. The results show that two countries sharing the euro currency trade somewhere between 9% and 14% more than other country-pairs. In addition, there is no evidence of trade diversion due to the euro. In one strand of research, analysts examine trends in and the determinants of energy usage and intensity. In a second strand, researchers analyze the impact of trade flows on environmental outcomes

  7. Essays on environmental and energy economics

    Science.gov (United States)

    Brucal, Arlan Zandro

    This dissertation applies techniques from the expanding field of econometrics to the study of contemporary issues in environmental and resource economics. Three essays are offered that aim to generate meaningful policy implications through econometric analyses of the voluminous data recently becoming available to researchers. The first essay examines how overall price, quality and welfare changed as energy efficiency standards in the US became progressively more stringent between 2001-2011. A novel index-the Constant Quality Price Index (CQPI)-is developed to delineate changes in overall price and quality. Results obtained using point-of-sale data from individual clothes washers sold in the US during the period suggest that standards on washing machines have had at worst a negligible effect on consumer welfare, or at best lowered prices and improved quality for washers. The second essay analyzes the relationship between foreign acquisition and aspects of plant-level environmental performance using micro data from the Indonesian Census of Manufacturing. To establish a causal effect of ownership change, a difference-in-differences approach is combined with coarsened exact matching. A total of 264 acquisition cases between 1983-2001 are considered, where an acquired plant is observed at least a year before and three years after undergoing a change in ownership, and for which a carefully selected control plant exists. Results suggest that FDIs can have positive scale and technique effects on the environmental performance of acquired plants. These effects are especially pronounced for small firms and firms that were relatively inefficient prior to acquisition. The third essay analyzes the impact of oil price shocks on the US economy at the individual state level. The study accounts for the endogeneity of changes in crude oil price, differences among states, and spillover effects with neighboring states. Results suggest that the implications of higher oil prices for a

  8. Three essays on hospitality management in emerging markets

    OpenAIRE

    Yan, Wei

    2017-01-01

    Esta tesis contiene artículos de investigación en anexo. This dissertation is composed of three essays on the hospitality management practices in the hotel and airline sectors of emerging markets. The three essays address the issues of loyalty programs, environmental innovations, and electronic word of mouth in hospitality management. The first essay analyzes the factors contributing to the popularity of airline and hotel companies’ loyalty programs. The results show that facto...

  9. Strategists and Academics : Essays on interaction in R&D

    OpenAIRE

    Broström, Anders

    2009-01-01

    This doctoral thesis consists of five self-contained essays on interaction in R&D between university researchers and private firms. Together, these essays explore the conditions under which private firms benefit from spillovers from publicly funded and organised research. From the first essay, which sets out to empirically validate the theoretical arguments about the benefits of university-industry interaction for private firms, the thesis follows a line of pursuit that goes back and fort...

  10. When Professors Don't Return Essays.

    Science.gov (United States)

    Feldman, William; Dhaliwal, Gurpreet

    2015-01-01

    Students devote hundreds of hours to writing notes during medical school clerkships but receive very limited feedback on that work. Medical student notes are like college essays-both are persuasive compositions. But attending physicians rarely scrutinize student notes like college professors analyze essays. This is a missed opportunity to teach clinical reasoning. A survey at our institution showed that only 16% of students received written feedback and 31% received oral feedback on their notes from more than 3 attending physicians during the first 8 months of 3rd-year clerkships. Many studies have reported a paucity of feedback across multiple domains and a sense among students that clinical reasoning is not being adequately taught during clerkships. Meanwhile, college professors teach written composition and reasoning through interactive methods that help students to develop structured, well-reasoned arguments. A recent study showed that 85% of Oxford undergraduates favored these demanding and time-intensive tutorials. Attending physicians who adopt a tutorial-based approach toward their students' notes would have a forum to teach clinical reasoning and emphasize the importance of written composition in medical practice.

  11. Thomas Trotter's 'Essay on Drunkenness' appraised.

    Science.gov (United States)

    Edwards, Griffith

    2012-09-01

    In 1804 Thomas Trotter, a recently retired Physician to the Fleet, published his 'Essay on Drunkenness'. This was the first ever book-length consideration of the phenomenon of alcohol dependence and its treatment. The aim of this paper is to explore the impact of that treatise on the evolution of relevant ideas over the years that have followed. A factual analysis of the content of the Essay is the starting-point, followed by an examination of sequential published appraisals on the significance, or lack of significance, of this work. To the modern reader, Trotter is likely to be seen as prescient, with his assertion that 'the habit of drunkenness is a disease of the mind', setting the scene for two centuries of debate. The literature, however, seems to suggest that Trotter did not, in fact, achieve much impact either on professional opinion or on the emergent temperance movement. It was Benjamin Rush's 1785 pamphlet on 'Ardent Spirits' which achieved iconic status. Rush and Trotter, although in some ways overlapping in their ideas, differed in other respects. © 2012 The Author. Addiction © 2012 Society for the Study of Addiction.

  12. Essays on regulation, institutions, and industrial organization

    Science.gov (United States)

    Bergara, Mario Esteban

    Essay I develops a comparative institutional analysis of network access price regulation and "light-handed" regulation. While the former is a specific-agency-based arrangement with higher political influence, the latter is a court-based system. Consequently, the main trade-off between both frameworks reflects the merits of having efficient political and judicial institutions. Price regulation is superior when distributional concerns are irrelevant and information asymmetries are lower. Poorly functioning political systems and high welfare costs of raising funds make price regulation less attractive. Light regulation is more attractive when potential rents are smaller, the monopolist is more risk averse, the judicial system is more efficient, and the threat of government intervention is more credible. The possibility of private transfers makes price regulation more advantageous. Higher information asymmetries among firms makes light-handed regulation more attractive. The main results are consistent with a plausible interpretation of the drastic deregulatory process in New Zealand. Essay II studies the preliminary effects of the deregulation of direct access in the New Zealand's electricity market. A slight improvement in quality standards and an overall efficiency increase took place after two years of deregulation. Retailers were able to successfully enter in large demand, dense areas, with a large proportion of industrial and commercial users, where incumbents were not distributing electricity efficiently. Pricing policies appears to be influenced by market forces (associated to economic and demographic characteristics) as expected in a light regulatory framework. Essay III focuses on the possibility of endogenous sunk costs and the introduction of new products. Firms that exert some monopoly power in one market and introduce a new good whose demand is determined by a broader set of consumers might be forced to change their competing strategies. If the new product

  13. Essays in energy economics: The electricity industry

    Science.gov (United States)

    Martinez-Chombo, Eduardo

    Electricity demand analysis using cointegration and error-correction models with time varying parameters: The Mexican case. In this essay we show how some flexibility can be allowed in modeling the parameters of the electricity demand function by employing the time varying coefficient (TVC) cointegrating model developed by Park and Hahn (1999). With the income elasticity of electricity demand modeled as a TVC, we perform tests to examine the adequacy of the proposed model against the cointegrating regression with fixed coefficients, as well as against the spuriousness of the regression with TVC. The results reject the specification of the model with fixed coefficients and favor the proposed model. We also show how some flexibility is gained in the specification of the error correction model based on the proposed TVC cointegrating model, by including more lags of the error correction term as predetermined variables. Finally, we present the results of some out-of-sample forecast comparison among competing models. Electricity demand and supply in Mexico. In this essay we present a simplified model of the Mexican electricity transmission network. We use the model to approximate the marginal cost of supplying electricity to consumers in different locations and at different times of the year. We examine how costs and system operations will be affected by proposed investments in generation and transmission capacity given a forecast of growth in regional electricity demands. Decomposing electricity prices with jumps. In this essay we propose a model that decomposes electricity prices into two independent stochastic processes: one that represents the "normal" pattern of electricity prices and the other that captures temporary shocks, or "jumps", with non-lasting effects in the market. Each contains specific mean reverting parameters to estimate. In order to identify such components we specify a state-space model with regime switching. Using Kim's (1994) filtering algorithm

  14. Winners of student essay contest receive awards

    Science.gov (United States)

    1999-01-01

    At the Apollo/Saturn V Center, George Meguiar (center left) and George English (center right) present scholarships to two students who entered an essay contest in conjunction with the 30th Anniversary of Apollo 11. The winners shown are Kyla Davis Horn, of Cocoa Beach, and Kyle Rukaczewski, of Satellite Beach. A third winner, Jason Gagnon, of Viera, was unable to attend. Meguiar and English head the Apollo 11 Commemoration Association which sponsored the contest in conjunction with Florida Today newspaper. The presentation was made at the Apollo/Saturn V Center during an anniversary banquet that honored all the people who made the Apollo Program possible. Special guests included former Apollo astronauts Neil Armstrong, Edwin 'Buzz' Aldrin, Gene Cernan and Walt Cunningham, who shared their experiences with the audience.

  15. An essay on Bion's beta function.

    Science.gov (United States)

    Oliner, Marion M

    2013-02-01

    Among the major theorists studying the effect of the external world on the individual, none had a more ambiguous relationship to the psychic manifestations of the environment than Wilfred Bion. On the one hand his theory of the mind contained a new concept, beta elements, to depict the intrusion of the material world into the mental sphere, while on the other he radically opposed the use of sensory perception as a source for clinical insight. The author examines this dichotomy as an outgrowth of her interest in the place of external reality in psychoanalytic theory. As a result, this essay is an attempt to clarify the source for Bion's theorizing, in order to be more specific about the applicability of his concepts and his precepts.

  16. Pictorial Essay: Infants of diabetic mothers

    International Nuclear Information System (INIS)

    Alorainy, Ibrahim A; Barlas, Nauman B; Al-Boukai, Amer A

    2010-01-01

    About 3 to 10% of pregnancies are complicated by glycemic control abnormalities. Maternal diabetes results in significantly greater risk for antenatal, perinatal, and neonatal morbidity and mortality, as well as congenital malformations. The number of diabetic mothers is expected to rise, as more and more of the obese pediatric female population in developed and some developing countries progresses to childbearing age. Radiologists, being part of the teams managing such pregnancies, should be well aware of the findings that may be encountered in infants of diabetic mothers. Timely, accurate, and proper radiological evaluation can reduce morbidity and mortality in these infants. The purpose of this essay is to illustrate the imaging findings in the various pathological conditions involving the major body systems in the offspring of women with diabetes

  17. Essay on Option Pricing, Hedging and Calibration

    DEFF Research Database (Denmark)

    da Silva Ribeiro, André Manuel

    Quantitative finance is concerned about applying mathematics to financial markets.This thesis is a collection of essays that study different problems in this field: How efficient are option price approximations to calibrate a stochastic volatilitymodel? (Chapter 2) How different is the discretely...... of dynamics? (Chapter 5) How can we formulate a simple free-arbitrage model to price correlationswaps? (Chapter 6) A summary of the work presented in this thesis: Approximation Behooves Calibration In this paper we show that calibration based on an expansion approximation for option prices in the Heston...... stochastic volatility model gives stable, accurate, and fast results for S&P500-index option data over the period 2005 to 2009. Discretely Sampled Variance Options: A Stochastic Approximation Approach In this paper, we expand Drimus and Farkas (2012) framework to price variance options on discretely sampled...

  18. Mathematical statistics essays on history and methodology

    CERN Document Server

    Pfanzagl, Johann

    2017-01-01

    This book presents a detailed description of the development of statistical theory. In the mid twentieth century, the development of mathematical statistics underwent an enduring change, due to the advent of more refined mathematical tools. New concepts like sufficiency, superefficiency, adaptivity etc. motivated scholars to reflect upon the interpretation of mathematical concepts in terms of their real-world relevance. Questions concerning the optimality of estimators, for instance, had remained unanswered for decades, because a meaningful concept of optimality (based on the regularity of the estimators, the representation of their limit distribution and assertions about their concentration by means of Anderson’s Theorem) was not yet available. The rapidly developing asymptotic theory provided approximate answers to questions for which non-asymptotic theory had found no satisfying solutions. In four engaging essays, this book presents a detailed description of how the use of mathematical methods stimulated...

  19. Collaborative essay testing: group work that counts.

    Science.gov (United States)

    Gallagher, Peggy A

    2009-01-01

    Because much of a nurse's work is accomplished through working in groups, nursing students need an understanding of group process as well as opportunities to problem-solve in groups. Despite an emphasis on group activities as critical for classroom learning, there is a lack of evidence in the nursing literature that describes collaborative essay testing as a teaching strategy. In this class, nursing students worked together in small groups to answer examination questions before submitting a common set of answers. In a follow-up survey, students reported that collaborative testing was a positive experience (e.g., promoting critical thinking, confidence in knowledge, and teamwork). Faculty were excited by the lively dialog heard during the testing in what appeared to be an atmosphere of teamwork. Future efforts could include providing nursing students with direct instruction on group process and more opportunities to work and test collaboratively.

  20. Jeremy Bentham's essay on "Paederasty". Part 2.

    Science.gov (United States)

    Crompton, L

    1978-01-01

    This is Part 2 of a transcription of Bentham's manuscript essay on "Paederasty" (1785), Part 1 of which appeared in Vol. 3, No. 4. In Part 1 Bentham argued for the decriminalization of sodomy and opposed the theories of Montesquieu and Voltaire as to its social dangers. In Part 2 Bentham speculates on its causes and alleges that the real reason such behavior is so severely punished is an irrational "antipathy" to pleasure generally and to sexual pleasure in particular. He discusses the danger of blackmail and false accusations and the punishment of lesbian acts, bestiality, and masturbation. Some miscellaneous related notes by Bentham are appended: these deal with religious fears based on the destruction of Sodom, the threat to population, the harshness of English naval law, and other topics.

  1. Metaphor of society (a sociological essay

    Directory of Open Access Journals (Sweden)

    Gennadii Vasil’evich Osipov

    2014-11-01

    Full Text Available The essay by Academician G.V. Osipov, who is the patriarch of Russian sociology, is dedicated to one of the most cognitive topics of modern sociology – identification of sociological metaphor as such and its application in research projects. This topic is avant-garde for the world sociological thought, and in Russia such kind of research is making its first steps. However, its future importance is difficult to overestimate. Sociological metaphor, if a methodology for its application is developed, can provide scientists with qualitatively new synthetic research tools. It can also bring together scientific structures and artifacts on the space of interdisciplinary and inter-subject borderland and give them qualitatively new intellectual and sensuous (system and mental technological capabilities for learning the surrounding world. The advantage of the following essay can be found in the fact that it is based on the objective analysis of the real embodiment of social metaphor in the work of art – a pictorial triptych “The Mystery of the 21st Century”. This is the first such experience in domestic sociological and artistic-painting practice. The authors of the final product are a scientist of great scientific and life experience and a young artist, who received in-depth sociological training and defended his Ph.D. in Sociology dissertation. But the main result of their collaboration is a product that combines scientific (sociological knowledge and insight and intuitive-creative artistic perception in a qualitatively new perception of the world and world outlook

  2. Manifestações clínicas de pacientes com diagnóstico de neurocisticercose por tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    PFUETZENREITER MÁRCIA REGINA

    1999-01-01

    Full Text Available Foram estudados através de entrevistas semi-estruturadas pacientes submetidos a tomografia computadorizada de crânio em um centro de diagnóstico por imagem na cidade de Lages. Realizaram-se entrevistas em 42 pacientes positivos para cisticercose cerebral e 57 pacientes sem alterações patológicas ao referido exame. Os pacientes com diagnóstico positivo relataram com maior frequência manifestações clínicas relacionadas à neurocisticercose, sendo este fato mais marcante para o sexo feminino, com exceção de convulsões, que ocorreram mais no sexo masculino (19,05% que no feminino (7,14%. A maior percentagem de diagnósticos de formas inativas (83,33% e o relato de sintomas em um tempo mais prolongado entre os entrevistados positivos sugerem que o problema é antigo.

  3. Variações anatômicas das cavidades paranasais à tomografia computadorizada multislice: o que procurar?

    Directory of Open Access Journals (Sweden)

    Christiana Maia Nobre Rocha de Miranda

    2011-08-01

    Full Text Available A tomografia computadorizada multislice é, atualmente, a modalidade de imagem de escolha para a avaliação dos seios paranasais e das estruturas adjacentes. Ela tem sido cada vez mais utilizada para a avaliação das variações anatômicas, identificando-as de forma precisa e com elevados detalhes anatômicos. Algumas variações anatômicas podem predispor a sinusopatias e constituir regiões de alto risco para lesões e complicações durante atos operatórios. Portanto, o reconhecimento dessas variações é de fundamental importância no pré-operatório de cirurgia endoscópica.

  4. Estudo radiográfico e por tomografia computadorizada das formações orais em cães

    OpenAIRE

    Carolina de Oliveira Ghirelli

    2008-01-01

    As neoplasias orais representam a quarta neoplasia mais comum em cães. O diagnóstico por imagem das neoplasias orais é necessário para determinar a extensão do tumor e dos tecidos locais acometidos, auxiliando no prognóstico e planejamento cirúrgico. Atualmente o exame radiográfico é o método diagnóstico mais utilizado por ser mais acessível e menos oneroso, porém o grande número de estruturas no crânio e suas sobreposições dificultam adequada avaliação desta região. A tomografia computadoriz...

  5. The future-essay as a design tool

    DEFF Research Database (Denmark)

    Thomsen, Bente Dahl; Kappel, Anne

    2007-01-01

    The aim of this paper is to present scenarios, photo-essays and future-essays as tools in communication, and as tools for clarifying the use of products in the future and the aesthetic qualities in the programme. In the design process, the programme is a description of the function, the condition...

  6. Essays in game theory and natural resource management

    NARCIS (Netherlands)

    Pham Do, K.H.

    2003-01-01

    This thesis presents a collection of essays in game theory with applications to environmental resource problems and their management. A major focus of these essays is related to coalitional games in which several classes of games, their properties and solution concepts are studied. Game theory is

  7. A Crosscultural Analysis of Argumentative Strategies in Student Essays.

    Science.gov (United States)

    Kamimura, Taeko; Oi, Kyoko

    A study of essays on a single topic (capital punishment) written by 22 American high school students and 30 second-year Japanese college students investigated: cultural differences in organizational patterns in argumentative essays; comparative use of rational and affective appeals; differences in content of rational and affective appeals;…

  8. Reliability of Holistic Scoring for the 1985 MCAT Essays.

    Science.gov (United States)

    Mitchell, Karen J.; Anderson, Judith A.

    A pilot essay was included in the 1985 Spring and Fall administrations of the Medical College Admission Test. A sample of 320 of the essays written by Fall examinees who had expressed an interest in allopathic medicine was used to calculate interrater reliability estimates. Sixteen of 20 readers who had been trained by White's suggestions for…

  9. History.edu: Essays on Teaching with Technology.

    Science.gov (United States)

    Trinkle, Dennis A., Ed.; Merriman, Scott A., Ed.

    Intended to be equally useful to high school and college instructors, this book contains studies in history pedagogy, among them the first three published essays measuring qualitatively and quantitatively the successes and failures of "e-teaching" and distance learning. Collectively, the essays urge instructors to take the next step with…

  10. Empirical essays on behavioral economics and lifecycle decisions

    NARCIS (Netherlands)

    Dillingh, Rik

    2016-01-01

    This dissertation consists of four empirical essays that study decisions on insurance, consumption and the accumulation and decumulation of wealth. The studies pay due attention to behavioral factors that may limit rationality, such as complexity and intertemporal choice. The first essay looks at

  11. Performance, Feedback, and Revision: Metacognitive Approaches to Undergraduate Essay Writing

    Science.gov (United States)

    Riddell, Jessica

    2015-01-01

    This paper explores ways in which frequent feedback and clear assessment criteria can improve students' essay writing performance in a first-year English literature course. Students (n = 68) completed a series of three scaffolded exercises over the course of a semester, where they evaluated undergraduate essays using a predetermined assessment…

  12. Writing anxiety: an affective filter for essay writing instruction among ...

    African Journals Online (AJOL)

    This study which adopted the descriptive research design investigated the relationship between writing anxiety and students' achievement in essay writing. SS2 Students from six schools in Ibadan Metropolis were used for the study. The instruments used were Essay Writing Achievement Test(r=0.81) and Writing Anxiety ...

  13. Secondary school learners\\' essays on suicide prevention | Pillay ...

    African Journals Online (AJOL)

    Methods: The present study is an analysis of 63 essays written by secondary school learners on the subject of suicide prevention. Results: Just over two-thirds of the essays revealed reasonable knowledge without serious inaccuracies, with over half the sample citing conflict with parents as precipitants to suicidal behaviour.

  14. Cooperation, networks and emotions: Three essays in behavioral economics

    NARCIS (Netherlands)

    van Leeuwen, B.

    2015-01-01

    This thesis contains three essays that study how people behave in a social context. The first two essays are on cooperation and networks. Chapter 2 investigates a mechanism to facilitate public good provision in networks. It relies on the idea that people compete for attractive network positions (or

  15. Essay-Writing: Do Study Manuals Give Relevant Advice?

    Science.gov (United States)

    Mahalski, Pauline A.

    1992-01-01

    A study of the writing of 28 geography students at Otago University (New Zealand) compared aspects of the essays with grading and rater comments. It is concluded that, although study manuals for essay-writing can help some students, their advice may not be useful to all; other methods may be more helpful. (Author/MSE)

  16. Essays examining aspects of the UK residential property market

    NARCIS (Netherlands)

    Glen, J.

    2012-01-01

    This thesis contains five essays addressing a variety of topics relating to aspects of the UK residential property market. The first essay examines the long run drivers of real residential house prices, and then seeks to develop a short run error correction model to examine the adjustment of real

  17. Essays on empirical industrial organization : Entry and innovation

    NARCIS (Netherlands)

    Fernandez Machado, Roxana

    2017-01-01

    The dissertation contains three essays on empirical industrial organization devoted to studying firms' strategic interaction in different settings. The first essay develops an entry model to address an important matter in the area of urban economics: the development of cities. In particular, it

  18. The future of the city. Essays; De toekomst van de stad. Essays

    Energy Technology Data Exchange (ETDEWEB)

    Uitermark, J.; Schinkel, W. [Erasmus Universiteit Rotterdam EUR, Rotterdam (Netherlands); Engelen, E. [Universiteit van Amsterdam UvA, Amsterdam (Netherlands); Raspe, O.; Hamers, D. [Planbureau voor de Leefomgeving PBL, Den Haag (Netherlands); Janssen, J.; Beunen, R. [Wageningen University WUR, Wageningen (Netherlands); Schutten, I. [Studio Iris Schutten, Den Haag (Netherlands); Mommaas, H. [Universiteit Tilburg, Telos, Brabants Centrum voor Duurzame Ontwikkeling, Tilburg (Netherlands); Tillie, N. [Landschapsarchitect en adviseur duurzaamheid, Technische Universiteit Delft TUD, Delft (Netherlands); Verheijen, M. [Hogeschool Rotterdam, Rotterdam (Netherlands); Schuilenburg, M. [Vrije Universiteit VU, Amsterdam (Netherlands); De Jong, J.D. [Rebond onderzoek en advies, Amsterdam (Netherlands); Van Steekelenburg, M. [Spatialplanning.com, Provinciehuis Zuid-Holland, Den Haag (Netherlands); Vermeulen, P. [Dienst Ruimtelijke Ordening Amsterdam, Amsterdam (Netherlands); De Waal, M. [The Public Matters, Amsterdam (Netherlands); Mulder, B. [Mandorla Consultancy, Bussum (Netherlands); Soeterbroek, F. [De Ruimtemaker, Utrecht (Netherlands); Wijma, J. [Programmabureau Regio Groningen-Assen, Groningen (Netherlands)

    2012-08-15

    The essays discuss nine tasks for the city. Each problem will be approached from two angles. The focus is on the relationship between governments and the self-resolving power in the city, the capacity of individuals, groups and organizations to change. Where In what cases does the self-resolving power of the city hamper? When is government intervention required? What is the role of connections between tasks, policies and groups? [Dutch] De essays gaan in op negen opgaven voor de stad. Elke opgave wordt vanuit twee invalshoeken belicht. Centraal staat de verhouding tussen overheden en zelfoplossend vermogen in de stad, de 'veranderkracht' van individuen, groepen en organisaties. Waar hapert het zelfoplossend vermogen van de stad? Wanneer is overheidsinterventie gewenst? Welke rol spelen verbindingen tussen opgaven, beleidssectoren en groepen daarbij?.

  19. Tomografia computadorizada na avaliação da densidade de um solo do semi-árido brasileiro

    Directory of Open Access Journals (Sweden)

    L. Fante Junior

    2002-12-01

    Full Text Available A densidade do solo de amostras indeformadas foi determinada por meio das técnicas de tomografia computadorizada e do torrão impermeabilizado, visando à identificação de processos de compactação do solo e a comparação de métodos. A pesquisa também visou auxiliar um levantamento pedológico elaborado com fins de classificação de terras para irrigação. As amostras de solo foram coletadas da região semi-árida de Petrolina (PE, ao longo de perfis do solo, da superfície até 1 m de profundidade, em camadas de 0,1 m e em duas áreas distintas quanto à sua ocupação vegetal e manejo: (1 vegetação natural (caatinga; (2 área cultivada e irrigada por pivô central. As tomografias foram realizadas com um tomógrafo de primeira geração, constituído por uma fonte de radiação gama de 137Cs e um detetor cintilador de NaI(Tl, com eletrônica padrão de espectrometria gama e sistema de movimentação de amostra controlados por uma interface específica acoplada a um microcomputador. Na área de caatinga, os resultados evidenciam a ocorrência de um adensamento do solo em camadas mais profundas, abaixo de 0,4 m, bem como de uma camada adensada e, ou, compactada entre aproximadamente 0 e 0,4 m, na área cultivada com pivô central, possivelmente em virtude da ação de máquinas e implementos utilizados no preparo e cultivo do solo.

  20. Stratus optical coherence tomography findings in patients with retinopathy of prematurity Tomografia de coerência óptica em pacientes com retinopatia da prematuridade

    Directory of Open Access Journals (Sweden)

    Aline do Lago

    2007-02-01

    Full Text Available PURPOSE: To describe morphological features of the macula in patients with retinopathy of prematurity. METHODS: Twelve premature babies with retinopathy of prematurity grades I, II and III underwent dilated fundus examination and optical coherence tomography evaluation. RESULTS: In all thirteen eyes of the twelve premature patients optical coherence tomography revealed a condensed retinal pigmented epithelial layer in the macular-foveal area shown by increased reflectivity. In these eyes the retinal layers were not well differentiated. Foveal depression was clearly evident in 23%. CONCLUSIONS: In premature patients with retinopathy of prematurity, optical coherence tomography revealed poorly differentiated layers in the macular region with increased reflectivity in retinal pigmented epithelial-choriocapillaris zone.OBJETIVO: Descrever os aspectos morfológicos da mácula em pacientes com retinopatia da prematuridade (ROP. MÉTODOS: Doze pacientes com retinopatia da prematuridade graus I, II and III foram submetidos a mapeamento de retina e avaliação por tomografia de coerência óptica. RESULTADOS: Em todos os treze olhos de 12 pacientes a tomografia de coerência óptica mostrou a camada do epitélio pigmentar hiperrefletiva, sendo a área macular com maior intensidade. Nesses olhos as camadas da retina não estavam totalmente diferenciadas. A depressão foveal ficou claramente evidente pela tomografia de coerência óptica em 23%. CONCLUSÃO: Nos pacientes prematuros com retinopatia da prematuridade, a tomografia de coerência óptica mostrou as camadas da retina pouco diferenciadas com aumento da refletividade na área macular do complexo epitélio retiniano pigmentar-coriocapilar.

  1. Los conjuntos palaciegos reales de las Tierras Bajas Mayas del sur: una evaluación de los datos arqueológicos e iconográficos Royal palace complexes in Southern Maya Lowlands: evaluating archaeological and iconographical data

    Directory of Open Access Journals (Sweden)

    Kai Delvendahl

    2010-01-01

    Full Text Available Este artículo va a trazar algunas conclusiones de una evaluación de los aspectos físicos, espaciales, funcionales y sociales de los conjuntos palaciegos reales tomando en cuenta evidencia arqueológica e iconográfica. Para el componente iconográfico se analizaron representaciones de escenas palaciegas pintadas sobre 87 vasijas cilíndricas de cerámica, mientras que para el componente arqueológico se evaluó información de conjuntos palaciegos bien documentados como el Grupo Palaciego M7 de Aguateca, el Palacio de Palenque, Los 27 Escalones de Kohunlich, el Grupo 10L-2 de Copán, la Acrópolis Central de Tikal y el Grupo Gran Acrópolis de Calakmul. Uno de los objetivos generales de este trabajo es proporcionar un ejemplo de cómo se puede capitalizar la información que las escenas palaciegas proveen (al comparar el corpus iconográfico con el dato arqueológico. Esto permitiría plantear ideas más ajustadas sobre los aspectos físicos, espaciales, funcionales y sociales de los conjuntos palaciegos del Clásico Tardío en el área maya.This paper will present some conclusions of an evaluation of the physical, spatial, functional, and social aspects of Classic Maya royal palaces taking into account archaeological and iconographic evidence. For the iconographic evaluation, the analysis examined representations of palace-like ambience on 87 cylindrical ceramic vases, while the archaeological information includes data from the better documented palace groups of the Southern Maya Lowlands, including the Palace Group M7 of Aguateca, the Palace of Palenque, Los 27 Escalones of Kohunlich, Group 10L-2 of Copan, the Central Acropolis of Tikal and the Grand Acropolis Group of Calakmul. In comparing the iconographic corpus with the archaeological evidence, one of the general objectives of this presentation is to provide an example of how the information inherent in the palace scenes can be capitalized to propose more adjusted ideas about the

  2. A tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia

    Directory of Open Access Journals (Sweden)

    Bruno de Freitas Valbon

    2013-02-01

    Full Text Available Descrevemos a importância da tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia. Esta descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam - Oculus, Wetzlar, Germany neste relato de caso, demonstra a relevância de uma nova tecnologia na avaliação da córnea e segmento anterior na suspeita de ceratocone. O diagnóstico de ceratocone foi excluído pela análise dos índices tomográficos de ectasia. Detectou-se assimetria entre os lados nasal e temporal por meio da avaliação do mapa de profundidade de câmara anterior. No exame biomicroscópico sob midríase foi constatado subluxação do cristalino, sendo assim devemos estar atentos não somente aos índices tomográficos corneanos na avaliação do exame complementar e sim analisarmos outros dados importantes oferecidos pela tomografia de córnea e segmento anterior.

  3. Latin America: Essays Interpretating Colonial Legacy

    Directory of Open Access Journals (Sweden)

    María Pia López

    2013-12-01

    Full Text Available A large part of the Latin–American literature of the 19th and 20th century tried to deal with the national question intertwining different dimensions: the weight of colonial legacy, the cultural peculiarity of the nation and the inner relations between social classes and ethnic groups. Thinking the nation implied, in any case, to think the difference and the conflict with others, as well as the inner conflict and the logic of local colonialism. Analyzing some of these essays that played a central role in such process of recasting the origin of the nation, the author moves around three main axes: the formulation of dualist writings (colonial/national; white /indigenous; civilization/wilderness, the issue of language (the language inherited from the colonial experience versus the multilingual nature of indigenous Latin American societies, and the hypothesis about the birth of the nation – appointed to different groups – and its normal functioning as legitimization of the order sprung from independences.

  4. The Test of Practice–An Essay

    Directory of Open Access Journals (Sweden)

    Lars Løvlie

    2017-02-01

    Full Text Available This essay starts in medias res, in the puzzling reappearance of the classical metaphor of Bildung as the transformation of man’s “first” animal nature into the “second” cultivated one. I call it the two-natures metaphor. I think it misrepresents children by prescribing form rather than asking what actually takes form in the child’s mind—in his/her relationship with adults. It made me wonder whether this mistake also lingers on in the current discourse on education. I then turn to aspects of John Dewey’s subtle and revolutionary critique of the classical theory of formation, but also to make the controversial point that he, too, seems to miss the importance of the child’s internal point of view. The importance of the subjective life of the child is suggested first by reinscribing Rousseau and Kant into the intersubjective theories of Hegel and Dewey; second, by reference to recent studies in developmental psychology that offer detailed and in-depth descriptions of our relationship with children. My basic point of departure is the existential encounters between children and adults, for example, as part of classroom practices. The title has a double connotation. It means that theory must be taken as the measure of practice. It means, too, that practice must work as the measure of theory. I will, in the main, try and pursue the last course.

  5. Magnetic resonance imaging of hepatic pseudolesions: a pictorial essay

    OpenAIRE

    Meirelles, Gustavo de Souza Portes [UNIFESP; Tiferes, Dario Ariel [UNIFESP; D'Ippolito, Giuseppe [UNIFESP

    2003-01-01

    A ressonância magnética é uma técnica de grande importância na avaliação do fígado. Assim como na tomografia computadorizada helicoidal, o emprego de aquisições rápidas, em fases diferentes da vascularização hepática, auxilia na detecção e caracterização de tumores. Contudo, algumas armadilhas podem confundir e dificultar a interpretação do exame, simulando lesões parenquimatosas. Estas armadilhas têm forma, localização e características variadas, sendo denominadas de pseudolesões. Podem ser ...

  6. Tomografia de coerência óptica na commotio retinae: relato de caso Optical coherence tomography imaging in commotio retinae: case report

    Directory of Open Access Journals (Sweden)

    Celso Morita

    2009-08-01

    Full Text Available O objetivo deste relato é correlacionar achados à tomografia de coerência óptica e prognóstico visual de pacientes com commotio retina e de gravidades diferentes. Dois pacientes do sexo masculino, de 20 e 23 anos com baixa visual unilateral após trauma ocular contuso atribuível a edema de Berlin foram avaliados pela retinografia e tomografia de coerência óptica. A acuidade visual no olho afetado era de 20/25 no primeiro paciente e conta dedos a 2 metros no segundo. O exame oftalmológico revelou uveíte traumática e, na fundoscopia, evidenciaram-se opacificação retiniana moderada no primeiro caso e grave no segundo. A tomografia de coerência óptica confirmou discreta diminuição da depressão foveal no primeiro caso e desorganização das camadas retinianas no segundo. Houve resolução anatômica e funcional completa a tomografia de coerência óptica no primeiro paciente, enquanto o segundo evoluiu com baixa visual permanente e desorganização da arquitetura retiniana. A tomografia de coerência óptica é um exame complementar útil na avaliação do trauma retiniano, ajudando a entender sua fisiopatologia e predizer prognóstico a partir da análise anatômica da região acometida.The purpose of this case report was to correlate optical coherence tomography findings and visual outcomes of patients with different degrees of commotio retinae. A 20-year-old male and a 23-year-old male that presented with decreased vision due to Berlin's edema after blunt ocular trauma were evaluated by optical coherence tomography and retinography. The visual acuity in the affected eye was 20/25 in the first patient and counting fingers in the second one. The ophthalmic examination showed traumatic uveitis and fundoscopy revealed mild retinal opacification in the first case and severe opacification in the latter. The optical coherence tomography confirmed the reduction of foveal depression on the first case and the disarrangement of all retinal

  7. Librarianship and literature essays in honour of Jack Pafford

    CERN Document Server

    Milne, A T

    2014-01-01

    These essays are produced in honour of the seventieth birthday of Dr J. H. Pafford, Goldsmith's Librarian of the University of London from 1945 to 1967, and reflect his interests in librarianship, textual editing and local history.

  8. Technology and Military Doctrine. Essays on a Challenging Relationship

    National Research Council Canada - National Science Library

    Holley, I

    2004-01-01

    .... In these essays, Holley primarily addresses the need for the Air Force to adapt its doctrine and the processes of formulating and disseminating that guidance as the technology of air and space warfare improves. Dr...

  9. Biotechnology essay competition: biotechnology and sustainable food practices.

    Science.gov (United States)

    Peng, Judy; Schoeb, Helena; Lee, Gina

    2013-06-01

    Biotechnology Journal announces our second biotechnology essay competition with the theme "biotechnology and sustainable food practices", open to all undergraduate students. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  10. Postphenomenological Investigations: Essays on Human-Technology Relations

    NARCIS (Netherlands)

    Rosenberger, Robert; Verbeek, Peter P.C.C.

    2015-01-01

    Postphenomenological Investigations: Essays on Human–Technology Relations provides an introduction to the school of thought called postphenomenology and showcases projects at the cutting edge of this perspective. Postphenomenology presents a unique blend of insights from the philosophical traditions

  11. Essays on Computable Economics, Methodology and the Philosophy of Science

    OpenAIRE

    Velupillai, Kumaraswamy

    2003-01-01

    These essays tackle standard problems in mathematical economics, macroeconomics, methodology and a particular aspect of Popperian Philosophy of Science from the point of view of classical recursion theory and constructive mathematics.

  12. Essays on U.S. energy markets

    Science.gov (United States)

    Brightwell, David A.

    2008-04-01

    This dissertation examines three facets of U.S. energy use and policy. First, I examine the Gulf Coast petroleum refining industry to determine the structure of the industry. Using the duality between cost-minimization and production functions, I estimate the demand for labor to determine the underlying production function. The results indicate that refineries have become more capital intensive due to the relative price increase of labor. The industry has consolidated in response to higher labor costs and costs of environmental compliance. Next, I examine oil production in the United States. An empirical model based on the theoretical framework of Pindyck is used to estimate production. This model differs from previous research by using state level data rather than national level data. The results indicate that the production elasticity with respect to reserves and the price elasticity of supply are both inelastic in the long run. The implication of these findings is that policies designed to increase domestic production through subsidies, tax breaks, or royalty reductions will likely provide little additional oil. We simulate production under three scenarios. In the most extreme scenario, prices double between 2005 and 2030 while reserves increase by 50%. Under this scenario, oil production in 2030 is approximately the same as the 2005 level. The third essay estimates demand for fossil fuels in the U.S. and uses these estimates to forecast CO2 emissions. The results indicate that there is almost no substitution from one fossil fuel to another and that all three fossil fuels are inelastic in the long run. Additionally, all three fuels respond differently to changes in GDP. The result of the differing elasticities with respect to GDP is that the energy mix has changed over time. The implication for forecasting CO2 emissions is that models that cannot distinguish changes in the energy mix are not effective in forecasting CO2 emissions.

  13. Four essays on market power in energy economics

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, Petter Vegard

    2008-07-01

    Market power in energy markets is discussed intensively in both academic and public arenas. There has been an intense energy debate on market power at least since the Organization of Petroleum Exporting Countries (OPEC) exercised its market power and caused the 'oil crisis' of the 1970s, and again following the deregulation of electricity markets at the beginning of the 1990s. However, this debate is not new. In 1911, for example, the US Supreme Court divided Standard Oil into 34 separate companies using antitrust law. With increasing energy prices and the ongoing process of liberalization of electricity markets throughout the world, the topic is still relevant for future markets. The four essays in this dissertation discuss specific aspects of market power in energy markets. The first essay concerns the crude oil market, and the remaining three essays relate to market power in the Nordic and Norwegian electricity markets. In the first essay, a multi-equation dynamic econometric model tests whether the behaviour of OPEC, as a whole or as different subgroups, is consistent with the behaviour of dominant producers in the world crude oil market. The second essay is a theoretical work that introduces uncertainty in inflow to the discussion of market power in hydropower markets by analysing the effects of uncertainty in inflow on market performance under alternative assumptions about market structure. In the third essay, high-frequency data are used to analyse how price signals from the spot market affect end-user demand in the Norwegian and Swedish electricity markets. Finally, in the fourth essay, retailer and household behaviour in the Norwegian electricity market are analysed using detailed information on prices and other market characteristics. In the following section, I provide highlights from a general discussion of market power in order to set the essays included in this dissertation in context. (Author). refs., figs., tabs

  14. Essays in Industrial Organization: Intermediation, Marketing, and Strategic Pricing

    OpenAIRE

    Wismer, Sebastian

    2014-01-01

    This dissertation deals with certain business strategies that have become particularly relevant with the spread and development of new information technologies. The introduction explains the motivation, discusses different ways of defining the term "two-sided market", and briefly summarizes the subsequent essays. The first essay examines the effects of product information on the pricing and advertising decision of a seller who offers an experience good whose quality is unknown to cons...

  15. Essays in economic development: education, child labour and wage inequality

    OpenAIRE

    Ahmed, Salma

    2017-01-01

    This thesis presents four self-contained essays that explore issues that are crucial in improving human well-being in a developing country: improving health, minimising child labour and reducing gender inequality. The analysis is focused on Bangladesh where the prevalence of child labour and gender differences in several domains is still widespread. The first essay aims to examine the gender wage gap along the entire wage distribution into an endowment effect and a discrimination effect, t...

  16. Essays on Labor Market Frictions, Technological Change and Macroeconomic Fluctuations

    OpenAIRE

    Vanhala, Juuso

    2007-01-01

    The dissertation consists of an introductory chapter and three essays that apply search-matching theory to study the interaction of labor market frictions, technological change and macroeconomic fluctuations. The first essay studies the impact of capital-embodied growth on equilibrium unemployment by extending a vintage capital/search model to incorporate vintage human capital. In addition to the capital obsolescence (or creative destruction) effect that tends to raise unemployment, vint...

  17. Essays on information disclosure and the environment

    Science.gov (United States)

    Mathai, Koshy

    The essays in this dissertation study information disclosure and environmental policy. The first chapter challenges the longstanding result that firms will, in general, voluntarily disclose information about product quality, in light of the unrealism of the assumption, common to much of the literature, that consumers are identical. When this assumption is relaxed, an efficiency-enhancing role may emerge for disclosure regulation, insofar as it can improve information provision and thus help protect consumers with "moderately atypical" preferences. The paper also endogenizes firms's choice of quality and suggests that disclosure regulation may also raise welfare indirectly, by inducing firms to improve product quality. The second chapter explores the significance of policy-induced technological change (ITC) for the design of carbon-abatement policies. The paper considers both R&D-based and learning-by-doing-based knowledge accumulation, examining each specification under both a cost-effectiveness and a benefit-cost policy criterion. We show analytically that the presence of ITC generally implies a lower profile of optimal carbon taxes, a shifting of abatement effort into the future (in the R&D scenarios), and an increase in the scale of abatement (in the benefit-cost scenarios). Numerical simulations indicate that the impact of ITC on abatement timing is very slight, but the effects on costs, optimal carbon taxes, and cumulative abatement can be large. The third chapter uses a World Bank dataset on Chinese state-owned enterprises to estimate price elasticities of industrial coal demand. A simple coal-demand equation is estimated in many forms, and significant price sensitivity is almost always found: the own-price elasticity is estimated to be roughly -0.5. A cost-function/share-equation system is also estimated, and although the function is frequently ill-behaved, indicating that firms may not be minimizing costs, the elasticity estimates again are large and

  18. LINFOMAS PULMONARES: CORRELAÇÃO DA TOMOGRAFIA COMPUTADORIZADA DE ALTA RESOLUÇÃO COM A ANATOMOPATOLOGIA

    Directory of Open Access Journals (Sweden)

    Marchiori Edson

    2002-01-01

    Full Text Available Neste trabalho são descritos os aspectos tomográficos de alta resolução dos linfomas pulmonares e feita correlação com os achados anatomopatológicos. Com este objetivo, foram revisados as tomografias computadorizadas de alta resolução do tórax e os dados histopatológicos de dez pacientes com diagnóstico confirmado de linfoma não-Hodgkin ou de doença de Hodgkin. Os resultados obtidos foram confrontados com os descritos na literatura. Os achados radiológicos mais comumente vistos neste estudo foram as consolidações parenquimatosas, localizadas, com broncogramas aéreos de permeio (n = 8. Em menor freqüência, foram encontrados múltiplos nódulos parenquimatosos (n = 4, espessamento peribroncovascular (n = 3 e opacidades em vidro fosco (n = 2. Na correlação com a anatomia patológica, as consolidações corresponderam a preenchimento alveolar por células neoplásicas, o espessamento peribroncovascular se deveu a infiltração das bainhas peribroncovasculares por células linfomatosas e a atenuação em vidro fosco se associou com infiltração dos septos alveolares por tais células.

  19. Computerized tomography findings in Fahr's syndrome Achados da tomografia computadorizada na síndrome de Fahr

    Directory of Open Access Journals (Sweden)

    Andréia V. Faria

    2004-09-01

    Full Text Available We analyzed computerized tomography (CT findings in six patients with Fahr's syndrome. They presented calcifications in basal ganglia, dentate nucleus, subcortical region and semioval center, due to alteration in calcium metabolism or due to senile relative hypoxemic state. The image pattern was not strictly related with etiology, although some differences in dystrophic senile calcifications (the only one present in semioval center and absent in subcortical region. CT is an easy exam, has maximum sensitivity and allows diagnosis, contributing to early treatment of many etiologies of Fahr's syndrome.Analisamos os achados de tomografia computadorizada (TC de seis pacientes com síndrome de Fahr. Eles apresentaram calcificações nos gânglios da base, núcleo denteado, região subcortical e centro semi-oval, devidas a distúrbios no metabolismo do cálcio ou a estado de hipóxia relativa, por senilidade. O padrão de imagem não apresenta relação clara com a etiologia, apesar de algumas diferenças no caso das calcificações distróficas senis (as únicas presentes nos centros semi-ovais e ausentes na região subcortical. TC é um exame de fácil realização, máxima sensibilidade e permite o diagnóstico, contribuindo para o tratamento precoce de muitas das etiologias da síndrome de Fahr.

  20. Five essays on fiscal policy, intergenerational welfare and petroleum wealth

    Energy Technology Data Exchange (ETDEWEB)

    Thoegersen, Oe.

    1994-12-01

    Motivated by current macro economic problems facing the Norwegian economy, this thesis deals with fiscal policy and the management of petroleum wealth in a small open resource economy. The thesis highlights the fact that considerable parts of the petroleum revenues are collected by the government and studies in particular the interaction between fiscal policy, uncertain petroleum revenues and welfare between generations. Essay 1 is a paper on the calculation of the Norwegian petroleum wealth and surveys economic effects of the development of the petroleum sector and the spending of the petroleum revenues. Essay 2 deals with the effects of uncertain government petroleum revenues on fiscal policy, wealth accumulation and inter generational welfare. In Essay 3 a discussion is given of the effects of oil price risk on international risk sharing. Petroleum importing and exporting countries are considered within OECD-Europe. A possible wealth consumption policy is found to have serious and long-lasting negative effects on the welfare of coming generations, as described in Essay 4. Finally, Essay 5 considers a dynamic dependent economy model extended to incorporate finite horizons of the households and structural adjustment costs in production. 121 refs., 19 figs., 10 tabs.

  1. LEARNER AUTONOMY ON ESSAY WRITING ACCURACY

    Directory of Open Access Journals (Sweden)

    Mohammad Hafidz

    2018-01-01

    Full Text Available Abstract: Learner autonomy on writing is independently teaching and learning that keeps students’ control to explore their knowledge and experiences in written language, find out and evaluate their errors based on the conceptual courses to make accurately simple essay. The aim was to know the effectiveness of the learner autonomy on writing accuracy. This quantitative research conducted in one group pretest and posttest design. The number of samples was 21 students in Bangkalan. The instrument were tests to gain students’ writing score before and after treatment. Researcher statistically analyzed the data using SPSS 23 version by running a Paired Samples Test. The result shown the means of pretes score was 66,83 and posttest score was 74,57, Paired Samples Correlations was 0,614 (strong correlation. Significance was 0,005, it means that  a (0,05 is higher than r value (0,005 with high variance of mean value (14,091. As a result, the hypothesis (H1­ was received that learner autonomy contributed effectively to learners’ in organizing own ideas (Ene, 2006 such as making a topic  map becomes some explanable sub-topics, writing down main and supporting idea, clustering some objects, editing next and learners  absolutely accumulate some selected vocabularies inappropriate topics  (Chengping W, 2008. Keyword: Learner Autonomy, Learning process, outcomes Absrak: Pembelajaran otonomi  adalah pembelajaran mandiri yang mengontrol mahasiswa untuk menyampaikan gagasan dan pengalamannya, mencatat dan mengevaluasi kesalahan yang terjadi dalam penulisan esai sederhana berdasarkan pembelajaran yang tersetruktur. Tujuan adalah untuk mengetahui efektifitas pembelajaran otonomi terhadap akurasi tulisan secara statistik. Penelitian ini dilakukan dengan menggunakan desain tes awal dan akhir. Jumlah sampel terdiri dari 21 siswa di Bangkalan. Isntrumen yang digunakan adalah tes untuk mengetahui hasil nilai mahasiswa sebelum dan sesudah melakukan

  2. Tomografia de coerência óptica em osteoma de coróide: relato de caso Optical coherence tomography in choroidal osteoma: case report

    Directory of Open Access Journals (Sweden)

    Mário Junqueira Nóbrega

    2005-10-01

    Full Text Available Os autores apresentam um caso de osteoma de coróide diagnosticado em paciente do sexo masculino aos 62 anos de idade. A lesão bem delimitada e pouco elevada no pólo posterior do olho direito acompanhada de vascularização interna e neovascularização de coróide em sua borda temporal superior e inferior levaram à suspeita do tumor. O diagnóstico de certeza foi obtido com ecografia A e B e tomografia computadorizada. A tomografia de coerência óptica mostrou alta refletividade em toda a espessura do osteoma bem como elevação do complexo EPR-cório-capilar na região da membrana neovascular subretiniana. Embora os achados tomográficos descritos na literatura e os observados neste caso sejam variados, a tomografia de coerência óptica pode colaborar no diagnóstico de osteoma de coróide.The authors present a case of choroidal osteoma diagnosed in a 62-year-old male patient. A well-defined and slightly elevated lesion located in the posterior pole of the right eye associated with internal vasculature and choroidal neovascularization at its superior and inferior temporal edge were suspicious of the tumor. Confirmation of diagnosis was obtained with A and B ecography and computed tomography. Optical coherence tomography showed high reflectivity through its thickness as well as elevation of the RPE-choriocapillaris complex at the choroidal neovascularization site. Although the literature and the present case show several different tomographical findings, optical coherence tomography can help establishing the diagnosis of choroidal osteoma.

  3. A neurocisticercose no Rio Grande do Norte antes e depois da tomografia computadorizada: apresentação de um caso

    Directory of Open Access Journals (Sweden)

    Ivanilton Galhardo

    1993-11-01

    Full Text Available Os autores fazem referência ao aparecimento de vários casos de neurocisticercose no Rio Grande do Norte após a chegada da tomografia computadorizada (TC ao Estado e enfatizam esse tipo de exame para o diagnóstico da parasitose no sistema nervoso. Apresentam um caso como sendo o primeiro diagnosticado e divulgado no Congresso Brasileiro de Neurologia realizado em Porto Alegre - RS, em outubro-1992. O diagnóstico foi feito, especialmente, pela TC e pela reação de hemaglutinação no líquido céfaloraqueano.

  4. Identificação do sexo de psitacídeos (Amazona aestiva) por meio da avaliação gonadal, utilizando a tomografia computadorizada (TC)

    OpenAIRE

    Lehmkuhl, Ricardo Coelho [UNESP

    2010-01-01

    O objetivo deste estudo foi avaliar a técnica de tomografia computadorizada como meio da visibilização e identificação dos órgãos reprodutivos (gônadas). Utilizou-se 38 aves da espécie Amazona aestiva, com sexo indeterminado e idade superior a cinco anos, para realizar o exame tomográfico utilizou-se anestesia dissociativa a base de quetamina e xilazina. As aves foram posicionadas em decúbito dorsal, e realizou-se os cortes axiais com intervalo de um milímetro. As imagens tomográficas adquiri...

  5. Essays on the frontiers of modern astrophysics and cosmology

    CERN Document Server

    Mathew, Santhosh

    2014-01-01

    This book is a collection of engaging and intriguing essays that describe an intellectual journey from the beginning to the end of universe. It is the product of an ongoing effort to know our place in the universe and share with readers the underpinnings of the magnificent cosmos where we are given a chance to exist only very briefly. The essays incorporate a group of challenging ideas that modern physics and cosmology are struggling to understand, in a unique way that incorporates mythological, religious, and philosophical perspectives. The author relies on a simple and powerful philosophy that we are part of the universe and the universe is part of us.   This wonderful collection of essays provides a journey through the current frontiers of modern astrophysics and cosmology. Its depiction of the most important unsolved mysteries about our place in the Universe is peppered with original insights and philosophical perspectives, making it an intellectual treat. – Avi Loeb, Professor, Harvard University Chai...

  6. An Essay on Project Management in Organisational Change

    DEFF Research Database (Denmark)

    Ry Nielsen, Jens Carl; Ry, Morten

    2003-01-01

    In this essay we will demonstrate that the role of project management in organisational changeprocesses is a mixture of rational and non-rational features. It is also colourful, difficult, interesting,and messy.We have named the paper `An Essay on'. An essay means treating a topic freely from...... differentangles, although not forgetting the sources you used. The implication of this is that we are not ableor willing to make an encompassing study of the literature on project management3. We thus knowthat many angles will not be covered. Furthermore we do not intend a make a negative delineation...... with successapplied decision-making theory as an approach for analysing organisation change processes5. Both authors have followed the same line in analysing organisational changes inthe Danish public sector6. That success has inspired us to re-use the distinction betweenrational, political and anarchic processes...

  7. Essays on the economics of decarbonization and renewable energy support

    Energy Technology Data Exchange (ETDEWEB)

    Jaegemann, Cosima Claudia

    2014-06-05

    The thesis consists of five essays investigating various aspects associated with the decarbonization of Europe's power sector and the politically incentivized expansion of renewable energy generation. The first essay analyzes the economic implications of alternative decarbonization pathways and policy instruments for Europe's power sector up to 2050 and illustrates the importance of ensuring competition between all low-carbon technologies in order to limit the costs of decarbonization. The second essay analyzes the economic inefficiency associated with the concept of grid parity for the case of photovoltaic (PV). In order to both enhance overall welfare and avoid redistributional effects, the indirect financial incentive for in-house PV electricity consumption should be abolished. The third essay discusses the system price effect of wind and solar power generation and illustrates that the decrease in the marginal value of wind and solar power (as a consequence of increased penetration) is already highly relevant for both wind and solar power generation in Germany. The fourth essay adds to the ongoing debate surrounding the cost-efficient achievement of politically implemented renewable energy targets. Renewable energy support schemes that fail to incentivize investors to account for differences in the marginal value of wind and solar power generation are associated with excess costs as they prevent the equalization of net marginal costs across technologies and regions. The fifth essay analyzes the economic value of storage as a function of the overall generation mix and illustrates the economic inefficiency arising from feed-in tariff systems for the special case of thermal energy storage units in concentrating solar power plants.

  8. Essays on the economics of decarbonization and renewable energy support

    International Nuclear Information System (INIS)

    Jaegemann, Cosima Claudia

    2014-01-01

    The thesis consists of five essays investigating various aspects associated with the decarbonization of Europe's power sector and the politically incentivized expansion of renewable energy generation. The first essay analyzes the economic implications of alternative decarbonization pathways and policy instruments for Europe's power sector up to 2050 and illustrates the importance of ensuring competition between all low-carbon technologies in order to limit the costs of decarbonization. The second essay analyzes the economic inefficiency associated with the concept of grid parity for the case of photovoltaic (PV). In order to both enhance overall welfare and avoid redistributional effects, the indirect financial incentive for in-house PV electricity consumption should be abolished. The third essay discusses the system price effect of wind and solar power generation and illustrates that the decrease in the marginal value of wind and solar power (as a consequence of increased penetration) is already highly relevant for both wind and solar power generation in Germany. The fourth essay adds to the ongoing debate surrounding the cost-efficient achievement of politically implemented renewable energy targets. Renewable energy support schemes that fail to incentivize investors to account for differences in the marginal value of wind and solar power generation are associated with excess costs as they prevent the equalization of net marginal costs across technologies and regions. The fifth essay analyzes the economic value of storage as a function of the overall generation mix and illustrates the economic inefficiency arising from feed-in tariff systems for the special case of thermal energy storage units in concentrating solar power plants.

  9. Space, Time, Matter, and Form Essays on Aristotle's Physics

    CERN Document Server

    Bostock, David

    2006-01-01

    Space, Time, Matter, and Form collects ten of David Bostock's essays on themes from Aristotle's Physics, four of them published here for the first time. The first five papers look at issues raised in the first two books of the Physics, centred on notions of matter and form, and the idea of substance as what persists through change. They also range over other of Aristotle's scientific works, such as his biology and psychology and the account of change in his De Generatione et Corruptione. The volume's remaining essays examine themes in later books of the Physics, including infinity, place, time

  10. Cosmopolitanism and peace in Kant's essay on 'Perpetual Peace'

    DEFF Research Database (Denmark)

    Huggler, Jørgen

    2010-01-01

    Immanuel Kant's essay on Perpetual Peace (1795/96) contains a rejection of the idea of a world government (earlier advocated by Kant himself). In connexion with a substantial argument for cosmopolitan rights based on the human body and its need for a space on the surface of the Earth, Kant presen...... the most rigorous philosophical formulation ever given of the limitations of the cosmopolitan law. In this contribution, Kant's essay is analysed and the reasons he gives for these restrictions discussed in relation to his main focus: to project a realistic path to perpetual peace....

  11. Essays on Exporting Behavior of Firms and on Inflation Persistence

    OpenAIRE

    Saxa, Branislav

    2009-01-01

    Research Journal Articles Working Papers Research in Brief Series Dissertations Other Publications Featured Article Dissertations Date: Tuesday, June 02, 2009 - 10:30 Branislav Saxa: "Essays on Exporting Behavior of Firms and on Inflation Persistence" Dissertation Committee: Jan Hanousek (chair) Evžen Kočenda Lubomír Lízal Krešimir Žigić Abstract: In the first two essays, I examine the behavior of exporters and non-exporters using a rich firmlevel panel data source from the Czech Republic. Th...

  12. Essays in general relativity a Festschrift for Abraham Taub

    CERN Document Server

    Tipler, Frank J

    1981-01-01

    Essays in General Relativity: A Festschrift for Abraham Taub is collection of essays to honor Professor Abraham H. Taub on the occasion of his retirement from the mathematics faculty of the University of California at Berkeley. Relativistic hydrodynamics has always been a subject dear to Taub's heart. In fact, many basic results on special relativistic fluid flows are due to him, and he has been a major contributor to the study of fluid flows near shocks. The book contains 16 chapters and begins with a discussion of a geometrical approach to general relativity. This is followed by separate cha

  13. Four essays on Conrad - an introduction Four essays on Conrad - an introduction

    Directory of Open Access Journals (Sweden)

    John Derrick

    2008-04-01

    Full Text Available To judge by the essays collected here, Joseph Conrad (1857 - 1924 is alive and well in Brazil. Whether they see him as some sort of reactionary Martin Bohmann, or as a stylist whose weaving of jungle vines and language still stands at the vanguard of Modernism, the four authors we present in this issue are clearly under his spell. Conrad it must be remembered, was not English at all, but a Polish self-exile whose parents were broken in the czars' camps for their revolutionary sympathies. He was also a dapper, formal little fellow who carried a goldheaded cane and liked to radiate the air of a Polish count. What wonder then that this man who claimed to dream in Polish, think in French, and write in English, should present contradictory faces to his interpreters: Ts Conrad a dated victorian whose lush style, antiquated feudal codes and quixotically macho notion of women set him apart from our world, or is he our contemporary by his psychological depth, his open-ended symbolism, and his vision of a third world tormented by colonial powers? To judge by the essays collected here, Joseph Conrad (1857 - 1924 is alive and well in Brazil. Whether they see him as some sort of reactionary Martin Bohmann, or as a stylist whose weaving of jungle vines and language still stands at the vanguard of Modernism, the four authors we present in this issue are clearly under his spell. Conrad it must be remembered, was not English at all, but a Polish self-exile whose parents were broken in the czars' camps for their revolutionary sympathies. He was also a dapper, formal little fellow who carried a goldheaded cane and liked to radiate the air of a Polish count. What wonder then that this man who claimed to dream in Polish, think in French, and write in English, should present contradictory faces to his interpreters: Ts Conrad a dated victorian whose lush style, antiquated feudal codes and quixotically macho notion of women set him apart from our world, or is he

  14. Essays on Energy Technology Innovation Policy

    Science.gov (United States)

    Chan, Gabriel Angelo Sherak

    .S. Department of Energy's National Laboratories, and provide the first quantitative evidence that technology transfer agreements at the Labs lead to greatly increased rates of innovation spillovers. This chapter also makes a key methodological contribution by introducing a technique to utilize automated text analysis in an empirical matching design that is broadly applicable to other types of social science studies. This work has important implications for how policies should be designed to maximize the social benefits of the $125 billion in annual federal funding allocated to research and development and the extent to which private firms can benefit from technology partnerships with the government. The final chapter of this dissertation explores the effectiveness of international policy to facilitate the deployment of low-emitting energy technologies in developing countries. Together with Joern Huenteler, I examine wind energy deployment in China supported through international climate finance flows under the Kyoto Protocol's Clean Development Mechanism. Utilizing a project-level financial model of wind energy projects parameterized with high-resolution observations of Chinese wind speeds, we find that the environmental benefits of projects financed under the Clean Development Mechanism are substantially lower than reported, as many Chinese wind projects would have been built without the Mechanism's support, and thus do not represent additional clean energy generation. Together, the essays in this dissertation suggest several limitations of energy technology innovation policy and areas for reform. Public funds for energy research and development could be made more effective if decision making approaches were better grounded in available technical expertise and developed in framework that captures the important interactions of technologies in a research and development portfolio. The first chapter of this dissertation suggests a politically feasible path towards this type of

  15. EDITORIAL: George W Series Memorial Essays

    Science.gov (United States)

    Dodd, J. N.

    1997-01-01

    tuneable lasers, generally with the emphasis on understanding the underlying physics rather than accumulating data. He had a highly original mind, which showed both in his choice of research topics and in his method of approach. He did not follow fashion; his instinct for an interesting problem was at odds with the modem policy of direct funding and the identification of "growth areas". His applications for research grants were often unsuccessful, despite his high international standing and integrity. He was never interested in building up a large research team, and had comparatively few research students, but his enthusiasm and commitment to the quality of his science attracted a succession of overseas visitors to his laboratory. Following my own year at the Clarendon, and some subsequent visits both to Oxford and to Reading, there was a continuing strong association between the Clarendon and Otago Physics that continues until today. George Series was the William Evans Visiting Professor to Otago University in 1972. He never lost his interest in the fundamentals of physics inspired by his first researches into the structure of the hydrogen atom; he wrote on the Rydberg constant, the physics of spontaneous emission, and on the fine-structure constant α = e2/hc. He donated a garden seat to St Edmund Hall (Oxford), of which he was a Fellow. On it he placed a plaque* in recognition of the ubiquitous nature of this constant; it almost had magical significance for him. He served physics in many ways outside research. He was for a number of years the Editor of the European Journal of Physics and was also Editor of the Journal of Physics B: Atomic and Molecular Physics, He was also on the Editorial Board of a number of journals. He was elected to Fellowship of a number of physics societies. The Editorial Board of these Memorial Essays dedicate them to George's memory, and to his wife Annette and his family.

  16. Controle de qualidade e dosimetria em equipamentos de tomografia computadorizada Quality control and dosimetry in computed tomography units

    Directory of Open Access Journals (Sweden)

    Diana Rodrigues de Pina

    2009-06-01

    Full Text Available OBJETIVO: Avaliação de condições dos equipamentos e dosimetria em setores de tomografia computadorizada utilizando protocolos de cabeça, abdome e coluna lombar em pacientes adultos (em três equipamentos distintos e pediátricos com até um ano e meio de vida (em um dos equipamentos avaliados. MATERIAIS E MÉTODOS: Foram estimados o índice de dose em tomografia computadorizada e a dose média em cortes múltiplos, em exames com pacientes adultos, em três distintos equipamentos. Ainda foram estimadas as doses na superfície de entrada e as doses absorvidas em exame de cabeça para pacientes adultos e pediátricos em um dos equipamentos avaliados. RESULTADOS: Foram realizados testes de controle de qualidade, mecânicos, demonstrando que os equipamentos satisfazem as especificações de uso estabelecidas pelas normas vigentes. Os resultados da dosimetria mostraram que valores de dose média em cortes múltiplos excederam em até 109,0% os valores de níveis de referência, apresentando consideráveis variações entre os equipamentos avaliados neste estudo. As doses absorvidas obtidas com protocolos pediátricos são inferiores aos de pacientes adultos, apresentando redução de até 51,0% na tireoide. CONCLUSÃO: Neste estudo foram avaliadas as condições de operação de três equipamentos tomográficos, estabelecendo quais parâmetros devem ser trabalhados para a implantação de um programa de controle de qualidade nas instituições onde esta pesquisa foi desenvolvida.OBJECTIVE: Evaluation of equipment conditions and dosimetry in computed tomography services utilizing protocols for head, abdomen, and lumbar spine in adult patients (in three different units and pediatric patients up to 18 months of age (in one of the units evaluated. MATERIALS AND METHODS: Computed tomography dose index and multiple-scan average dose were estimated in studies of adult patients with three different units. Additionally, entrance surface doses as well as

  17. General And Specific Features In Realizing An Essay In English Language – A Case Study Of Essay On Economic Themes

    Directory of Open Access Journals (Sweden)

    Daliana Ecaterina TASCOVICI

    2016-04-01

    Full Text Available The present paper wants to be a systematic and not only a theoretical approach on essays. This type of writing knows several points of view connecting its form, content, specific features and types, rules to be observed in its writing, structures or styles. As we know, it implies freedom of composition, originality, associations of surprising images and propensity for aphorism. We try to frame all its specifications within the economic essay, as economics is a field of exact utterance, where the speaker cannot play with the words and their meaning.

  18. The Sensible and Insensible Body: A Visual Essay

    Directory of Open Access Journals (Sweden)

    Joanna Bourke

    2012-12-01

    Full Text Available Translating pain into tangible images brings it into the public consciousness, raising the spectre of bodily suffering as virtually intrinsic to the human condition. Beginning with Descartes, who famously advanced mind-body theories in the late seventeenth century, this essay explores the effects of his influence together with shifting attitudes towards pain and its role over the long nineteenth century.

  19. Re-turn to practice: An introductory essay

    NARCIS (Netherlands)

    Miettinen, R.; Samra-Fredericks, D.; Yanow, D.

    2009-01-01

    The study of practices has a long theoretical history and draws on a wide range of methods. This introductory essay sets the stage for the five articles presented in this Special Issue by explaining its background and providing one narrative of the theoretical background on which both its editors

  20. Science and Traditional African Value System: Essay on Development

    African Journals Online (AJOL)

    The exercise of double demolition should end in the reintegration of science and the reconstruction of salient traditional values, necessary, for the development of contemporary Africa. By and large, the essay shall make an appraisal of theories of development enunciated by some African philosophers: that is, as it concerns ...

  1. Should God Get Tenure? Essays on Religion and Higher Education.

    Science.gov (United States)

    Gill, David W., Ed.

    Essays on the role of religion in higher education include: "Should God Get Tenure?" (David W. Gill); "On Being a Professor: The Case of Socrates" (Bruce R. Reichenbach); "Academic Excellence: Cliche or Humanizing Vision?" (Merold Westphal); "Religion, Science, and the Humanities in the Liberal Arts Curriculum" (H. Newton Maloney); "Tolstoy and…

  2. "The Country and the City" by Raymond Williams. Essay Review.

    Science.gov (United States)

    Johnson, Jerry D.; Howley, Craig B.

    2000-01-01

    Reviews essays by Raymond Williams, which explain how, within the context of a 150-year literary history, rural stereotypes have been constructed and imbedded within a collective consciousness by a form of cultural colonization. Suggests that Williams' insights can help rural education researchers think outside the conventional wisdom that…

  3. Three Essays on Bureaucracy at American Research Universities

    Science.gov (United States)

    Taggart, Gabel

    2017-01-01

    The three essays in this dissertation each examine how aspects of contemporary administrative structure within American research universities affect faculty outcomes. Specific aspects of administrative structure tested in this dissertation include the introduction of new administrative roles, administrative intensity (i.e., relative size of…

  4. Homer: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Steiner, George, Ed.; Fagles, Robert, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by George Steiner, Leo Tolstoy, Ezra Pound, Erich Auerbach, Edwin Muir, Cedric H. Whitman, Albert B. Lord, W. H. Auden, Ernst Bloch, Georg Lukacs, C. Day Lewis, Gabriel Germain, Franz Kafka, Rachel Bespaloff, Robert…

  5. Towards a Realist Sociology of Education: A Polyphonic Review Essay

    Science.gov (United States)

    Grenfell, Michael; Hood, Susan; Barrett, Brian D.; Schubert, Dan

    2017-01-01

    This review essay evaluates Karl Maton's "Knowledge and Knowers: Towards a Realist Sociology of Education" as a recent examination of the sociological causes and effects of education in the tradition of the French social theorist Pierre Bourdieu and the British educational sociologist Basil Bernstein. Maton's book synthesizes the…

  6. Dryden: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Schilling, Bernard N., Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Bernard Schilling, T. S. Eliot, Louis I. Bredvold, James M. Osborn, Reuben A. Brower, Edwin Morgan, Earl Wasserman, R. J. Kaufmann, Moody E. Prior, Earl W. Miner, Edward N. Hooker, E. M. W. Tillyard, John Hollander,…

  7. Baudelaire: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Peyre, Henri, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Paul Valery, Henri Peyre, Fracois Mauriac, Charles du Bos, Etienne Gilson, P.M. Pasinetti, John Middleton Murry, Marcel Proust, Georges Poulet, Erich Auerbach, and Jean Prevost--all dealing with the biography and literary…

  8. Antropologie tussen wetenschap en kunst : Essays over Clifford Geertz

    NARCIS (Netherlands)

    Kuiper, Yme; Bakker, Jan Willem; Miedema, Jelle

    1987-01-01

    Clifford Geertz (*1926) is one of the most influential anthropologists of his generation. His most famous monographs and collection of essays are The Religion of Java, Agricultural Involution, Islam Observed, The Interpretation of Cultures, Local Knowledge, Negara: The Balinese Theatre State in

  9. Stendhal: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Brombert, Victor, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Victor Brombert, Martin Turnell, Erich Auerbach, Jean Prevost, Raymond Giraud, Irving Howe, Judd D. Hubert, Leon Blum, Jean Starobinski, Jean-Pierre Richard, and Simone de Beauvoir--all dealing with the biography and…

  10. Cosmopolitanism and Peace in Kant's Essay on "Perpetual Peace"

    Science.gov (United States)

    Huggler, Jorgen

    2010-01-01

    Immanuel Kant's essay on Perpetual Peace (1795/96) contains a rejection of the idea of a world government (earlier advocated by Kant himself). In connexion with a substantial argument for cosmopolitan rights based on the human body and its need for a space on the surface of the Earth, Kant presents the most rigorous philosophical formulation ever…

  11. A Sense of Story: Essays on Contemporary Writers for Children.

    Science.gov (United States)

    Townsend, John Rowe

    This is an introduction to the work of 19 contemporary English-language writers for children. It consists of critical essays on the works of Joan Aiken, L. M. Boston, H. F. Brinsmead, John Christopher, Helen Cresswell, Meindert DeJong, Eleanor Estes, Paula Fox, Leon Garfield, Alan Garner, Madeleine L'Engle, William Mayne, Andre Norton, Scott…

  12. Mass Media and the National Experience; Essays in Communications History.

    Science.gov (United States)

    Farrar, Ronald T., Ed.; Stevens, John D., Ed.

    In 11 different essays, journalism historians reflect on the present state of their art and suggest ways and means of doing the important work that lies ahead. Areas of productive research suggested include freedom of expression, politics and economics, technology regionalism, Black journalism, the journalist as social critic, photographic…

  13. Improving Undergraduates' Argumentative Group Essay Writing through Self-Assessment

    Science.gov (United States)

    Fung, Yong Mei; Mei, Hooi Chee

    2015-01-01

    When writing an argumentative essay, writers develop and evaluate arguments to embody, initiate, or simulate various kinds of interpersonal and textual interaction for reader consideration (Wu & Allison, 2003). This is quite challenging for English as a second language (ESL) learners. To improve the quality of their writing, students need to…

  14. Group Essay Writing: Facilitating Team Learning Using ICT for Life ...

    African Journals Online (AJOL)

    Many tertiary level students do not use the Internet to develop as critical readers, writers and thinkers. The study set out to assess the impact of group essay writing method using ICT on the writing skills of B.Sc. year II science education students of the Technical Teacher Training Programme (TTTP) of Yaba College of ...

  15. Resensie: Koffer in Berlyn: Essays oor kabaret | Hambidge | Tydskrif ...

    African Journals Online (AJOL)

    Resensie: Koffer in Berlyn: Essays oor kabaret. J Hambidge. Abstract. Hennie Aucamp. Pretoria: Protea Boekhuis. 381 pp. ISBN: 978-1-86919-830-. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.4314/tvl.v50i2.30 · AJOL African ...

  16. Soft tissue cavernous haemangioma: Photo essay | Girma | Journal ...

    African Journals Online (AJOL)

    Soft tissue cavernous haemangioma: Photo essay. Edom Girma, Asfaw Atnafu. http://dx.doi.org/10.4314/jemp.v4i1.10614 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of Use · Contact AJOL · News.

  17. Tagtig gedigte en twee essays | Houellebecq | Tydskrif vir letterkunde

    African Journals Online (AJOL)

    Tydskrif vir letterkunde. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 51, No 1 (2014) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Tagtig gedigte en twee essays. M Houellebecq. Abstract. No Abstract. Full Text:.

  18. Judging essays: The challenge of interpretation | Olckers | South ...

    African Journals Online (AJOL)

    Drawing on the hermeneutical tradition, this article explores the interpretive processes of essay markers in two Health Science courses at the University of Cape Town, with a particular focus on markers' judgements about language. The analysis exposes multiple 'circles' of influence on markers' professional judgements, ...

  19. Implementing an outcomes-based approach to university essay writing

    African Journals Online (AJOL)

    In this article we present a case study to illustrate and reflect on the process of developing an outcomes‑based approach to essay writing in a university Economics 101 course. We argue that lecturers need support in the process of changing curricula and developing student writing to meet outcomes-based education policy ...

  20. Essays of a peripheral mind: An opinion on policy

    Science.gov (United States)

    Strengthening the connections between science and policy is critical if science is to have meaningful impacts. Policy is often primarily based on arrays of opinion and experience. Science typically shapes some of these opinions. This essay addresses characteristics of science and its communicatio...

  1. Source-Based Tasks in Writing Independent and Integrated Essays

    Directory of Open Access Journals (Sweden)

    Javad Gholami

    2017-07-01

    Full Text Available Integrated writing tasks have gained considerable attention in ESL and EFL writing assessment and are frequently needed and used in academic settings and daily life. However, they are very rarely practiced and promoted in writing classes. This paper explored the effects of source-based writing practice on EFL learners’ composing abilities and investigated the probable differences between those tasks and independent writing ones in improving Iranian EFL learners’ essay writing abilities. To this end, a quasi-experimental design was implemented to gauge EFL learners’ writing improvements using a pretest-posttest layout. Twenty female learners taking a TOEFL iBT preparation course were randomly divided into an only-writing group with just independent writing instruction and essay practice, and a hybrid-writing-approach group receiving instruction and practice on independent writing plus source-based essay writing for ten sessions. Based on the findings, the participants with hybrid writing practice outperformed their counterparts in integrated essay tests. Their superior performance was not observed in the case of traditional independent writing tasks. The present study calls for incorporating more source-based writing tasks in writing courses.

  2. MDCT imaging of post interventional liver: a pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Romano, Stefania [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy)]. E-mail: stefromano@libero.it; Tortora, Giovanni [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy); Scaglione, Mariano [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy); Lassandro, Francesco [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy); Guidi, Guido [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy); Grassi, Roberto [Institute of Radiology, Department ' Magrassi-Lanzara' , Second University of Naples, Naples 80138 (Italy); Romano, Luigia [Department of Diagnostic Imaging, Section of General and Emergency Radiology, A.Cardarelli Hospital, Viale Cardarelli, 9, 80131 Naples (Italy)

    2005-03-01

    In this pictorial essay, we consider the post operative MDCT findings after liver resection, transplantation, surgical managed major trauma and radiofrequency ablation of focal lesions. Common complications such as fluid collections, hemorrhage, biloma, vascular disease, hematoma, abscesses will be also considered.

  3. MDCT imaging of post interventional liver: a pictorial essay

    International Nuclear Information System (INIS)

    Romano, Stefania; Tortora, Giovanni; Scaglione, Mariano; Lassandro, Francesco; Guidi, Guido; Grassi, Roberto; Romano, Luigia

    2005-01-01

    In this pictorial essay, we consider the post operative MDCT findings after liver resection, transplantation, surgical managed major trauma and radiofrequency ablation of focal lesions. Common complications such as fluid collections, hemorrhage, biloma, vascular disease, hematoma, abscesses will be also considered

  4. Dostoevsky: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Wellek, Rene, Ed.

    One of a series of works aimed at presenting contemporary opinion on major authors, this collection includes essays by Rene Wellek, Philip Rahv, Murray Krieger, Irving Howe, Eliseo Vivas, D. H. Lawrence, Sigmund Freud, Dmitri Chizhevsky, V. V. Zenkovsky, Georg Lukacs, and Derek Traversi--all dealing with the biography and literary work of…

  5. A Basic Writer's Topoi for Timed Essay Tests.

    Science.gov (United States)

    Kirch, Ann

    1996-01-01

    Describes the problems some basic writing students have had generating ideas for writing in response to timed essay tests. Proposes a technique based on the classical notion of the "topoi," which enables students to generate ideas and equips them for participation in the social and political dialogs they encounter in higher education.…

  6. Automated Guidance for Thermodynamics Essays: Critiquing versus Revisiting

    Science.gov (United States)

    Donnelly, Dermot F.; Vitale, Jonathan M.; Linn, Marcia C.

    2015-01-01

    Middle school students struggle to explain thermodynamics concepts. In this study, to help students succeed, we use a natural language processing program to analyze their essays explaining the aspects of thermodynamics and provide guidance based on the automated score. The 346 sixth-grade students were assigned to either the critique condition…

  7. Entrepreneurship and innovation. Essays in honour of Wim During

    NARCIS (Netherlands)

    van der Sijde, Peter; Ridder, Annemarie; Groen, Arend J.

    2004-01-01

    Wim During started his work at the University of Twente in 1973. During his academic career, he elaborated two main themes: (high tech) entrepreneurship and high-tech small firms. The essays in this book -published on the occasion of his retirement as professor of Innovative Entrepreneurship at the

  8. An Essay in the Political Economy of Assessment Design

    Science.gov (United States)

    Sutton, Paul

    2012-01-01

    My point of departure in this essay is that student approaches to assessment appear to have become more instrumental, and that there has been a correlative propensity in my teaching practice to "teach to the test". Hence, both learners and teachers seem to have become more strategic in relation to assessment. This situation, I argue, is…

  9. Three Epiphanic Fragments: Education and the Essay in Memory

    Science.gov (United States)

    Aldridge, David

    2014-01-01

    Pádraig Hogan has argued for a powerful conception of education as epiphany that is illuminated by the work of Heidegger and Joyce. But what are we to make of Stephen Dedalus' intention (pretension?) to "Remember your epiphanies"? Developing the phenomenological Erinnerungsversuch or "essay in memory" of David Farrell…

  10. Evaluating the assessment of essay type questions in the basic ...

    African Journals Online (AJOL)

    Methodology: We examined the merits and demerits of the closed and open systems of assessment of essay type questions and viva voce in professional exams in the Basic Medical Sciences together with the challenges of present day Medical Education. Result: The result showed that the closed system of marking in its ...

  11. Classification of Swedish Learner Essays by CEFR Levels

    Science.gov (United States)

    Volodina, Elena; Pilán, Ildikó; Alfter, David

    2016-01-01

    The paper describes initial efforts on creating a system for the automatic assessment of Swedish second language (L2) learner essays from two points of view: holistic evaluation of the reached level according to the Common European Framework of Reference (CEFR), and the lexical analysis of texts for receptive and productive vocabulary per CEFR…

  12. Violence in the Black Imagination: Essays and Documents.

    Science.gov (United States)

    Takaki, Ronald T.

    These essays and documents, on and by Frederick Douglass, Martin Delany, and William Wells Brown focus on the oppression which they experienced and on violence and rebellion as it appears in the literature which they created. The chapters discuss Frederick Douglass and violence, rage in the fiction of Martin Delany, and the fiction of William…

  13. Anatomy of the ankle ligaments: a pictorial essay

    NARCIS (Netherlands)

    Golanó, Pau; Vega, Jordi; de Leeuw, Peter A. J.; Malagelada, Francesc; Manzanares, M. Cristina; Götzens, Víctor; van Dijk, C. Niek

    2010-01-01

    Understanding the anatomy of the ankle ligaments is important for correct diagnosis and treatment. Ankle ligament injury is the most frequent cause of acute ankle pain. Chronic ankle pain often finds its cause in laxity of one of the ankle ligaments. In this pictorial essay, the ligaments around the

  14. Anatomy of the ankle ligaments: a pictorial essay

    NARCIS (Netherlands)

    Golanó, Pau; Vega, Jordi; de Leeuw, Peter A. J.; Malagelada, Francesc; Manzanares, M. Cristina; Götzens, Víctor; van Dijk, C. Niek

    2016-01-01

    Understanding the anatomy of the ankle ligaments is important for correct diagnosis and treatment. Ankle ligament injury is the most frequent cause of acute ankle pain. Chronic ankle pain often finds its cause in laxity of one of the ankle ligaments. In this pictorial essay, the ligaments around the

  15. The Unlikelihood of Family: A Photographic Essay on Transnational Experiences

    Science.gov (United States)

    Navarro, Cristina Llerena

    2015-01-01

    In this photo essay, Cristina Llerena Navarro captures moments in the everyday lives of mixed-status families. Through her narrative and images, Llerena shares the stories of these families, their journeys to the United States as well as the consequences of deportation on the family unity. She evokes the children's deep yearning to be reunited…

  16. Ideals and realities selected essays of Abdus Salam

    CERN Document Server

    Salam, Abdus; Lai, CH

    1989-01-01

    The latest edition of "Ideals and Realities" includes some of the most recent talks given by Professor Abdus Salam. They replace a few essays which were published in the second edition. An attempt has also been made to update some of the figures rendered absolete with the passage of time.

  17. Accounting Issues: An Essay Series Part V--Intangible Assets

    Science.gov (United States)

    Laux, Judy

    2008-01-01

    This article represents the fifth in a series of theoretical essays intended to supplement the introductory financial accounting course and investigates the accounting treatment and related conceptual connections for intangibles. In addition, intangibles present unique accounting issues, conceptual challenges, and measurement dilemmas not found…

  18. Insight into osteo-articular digital tomosynthesis: a pictorial essay.

    Science.gov (United States)

    Lacout, Alexis; Thariat, Juliette; El Hajjam, Mostafa; Marcy, Pierre-Yves

    2013-02-01

    The objectives of this pictorial essay are to describe osteo-articular imaging using digital tomosynthesis. We provide characteristic examples in eight patients. Digital tomosynthesis allows easy, fast and low-dose imaging, with excellent spatial resolution. © 2012 The Authors; Journal of Medical Imaging and Radiation Oncology © 2012 The Royal Australian and New Zealand College of Radiologists.

  19. Sartre: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Kern, Edith, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Edith Kern, Claude-Edmonde Magny, Henri Peyre, Kenneth Douglas, Edmund Wilson, Theophil Spoerri, Jacques Guicharnaud, Eric Bentley, Robert Champigny, Oreste F. Pucciani, Frederic Jameson, Rene Girard, Guido…

  20. Proust: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Girard, Rene, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Rene Girard, Robert Vigneron, Henri Peyre, Jacques Riviere, Albert Thibaudet, Walter A. Strauss, Germaine Bree, Georges Cattaui, Elliott Coleman, Leo Spitzer, Richard Macksey, Robert Champigny, Charles Du Bos, Ramon…

  1. Tomografia computadorizada sem contraste intravenoso no abdome agudo: quando e por que usar When and why use unenhanced computed tomography in patients with acute abdomen

    Directory of Open Access Journals (Sweden)

    Edison de Oliveira Freire Filho

    2006-02-01

    Full Text Available A tomografia computadorizada sem contraste intravenoso tem sido freqüentemente proposta na avaliação inicial de pacientes com suspeita de abdome agudo, ocupando o espaço de outros métodos diagnósticos. Os autores apresentam uma revisão bibliográfica dos principais aspectos e eficácia da tomografia computadorizada sem contraste intravenoso no diagnóstico de apendicite aguda, cólica nefrética, diverticulite, pancreatite aguda, apendicite epiplóica, pneumoperitônio e obstrução intestinal. Discutem quais as vantagens e limitações desta técnica de exame, bem como seus aspectos práticos.The use of unenhanced computed tomography has been frequently recommended for the initial assessment of patients with clinical suspicion of acute abdomen instead of other diagnostic methods. The authors present a review of the literature on the main aspects, advantages, limitations and efficacy of unenhanced computed tomography for the diagnosis of acute appendicitis, renal colic, diverticulitis, acute pancreatitis, primary epiploic appendicitis, pneumoperitoneum and small bowel obstruction. The advantages and limitations of this technique are also discussed.

  2. Aspectos da tomografia de coerência óptica na oftalmia simpática: relato de caso Optical coherence tomography aspects of sympathetic ophthalmia: case report

    Directory of Open Access Journals (Sweden)

    Magno Antônio Ferreira

    2009-06-01

    Full Text Available A oftalmia simpática é uma panuveíte granulomatosa que se inicia após trauma ocular. O prognóstico é reservado e depende do diagnóstico e tratamento precoces. Os autores descrevem um caso de paciente portador de oftalmia simpática no qual foi realizada tomografia de coerência óptica e instituído tratamento precoce, e sugerem que a tomografia de coerência óptica possa corroborar como exame subsidiário no estudo das características da retina de pacientes portadores dessa doença, especialmente em casos de apresentação rara, com descolamento seroso da retina, como manifestação oftalmológica isolada.The sympathetic ophthalmia is a granulomatous panuveitis that starts after ocular trauma. The prognosis is poor and depends of both early diagnosis and treatment. The authors describe one case of a patient with sympathetic ophthalmia using optical coherence tomography who was submitted to early treatment, and it suggests that the optical coherence tomography can corroborate as a ancillary method in the study of retina characteristics in sympathetic ophthalmia disease specially in cases of rare presentation, with serous retinal detachment as an isolated ophthalmological manifestation.

  3. Calculation of uncertainties in influence quantities in biological essays

    Directory of Open Access Journals (Sweden)

    Pierre Morel

    2006-01-01

    Full Text Available Due to the need of showing the reliability of results from biological essays, such as in health and environmental areas, laboratories have been implementing quality systems, particularly ABNT NBR ISO/IEC 17025 (ABNT, 2001, which include as one of the requirements, the calculation of uncertainty in essays results. It is of common knowledge that estimating uncertainty in essays using organisms, such as animal and vegetal species, is difficult, preventing from meeting that requirement in the standard. The paper shows the calculation of uncertainties in influences quantities in these essays as a tool to allow validating the measuring process, by using the essays performed by Rhodia Environmental Impact Analysis Laboratory and IPEN Ecotoxicology Laboratory as examples.Devido à necessidade de demonstrar a confiabilidade dos resultados de ensaios biológicos como, por exemplo, nas áreas de saúde e ambiental, laboratórios vêm implementando sistemas da qualidade, em especial a ABNT NBR ISO/IEC 17025 (ABNT, 2001 que inclui como um dos requisitos o cálculo da incerteza dos resultados dos ensaios. É reconhecidamente difícil de estimar a incerteza de ensaios que utilizam organismos, como com espécies animais e vegetais o que impede, consequentemente, o atendimento deste requisito da norma. O trabalho apresenta o cálculo de incerteza das grandezas de influências nestes ensaios como uma ferramenta que permite validar o processo de medição, utilizando como exemplos aqueles realizados pelos Laboratórios de Análise de Impacto Ambiental da Rhodia e de Ecologia e Ecotoxicologia do IPEN.

  4. Essay Writing in Nursing: Alerting Students and Teachers to the Educational Benefits.

    Science.gov (United States)

    Brennan, Michael J.

    1995-01-01

    Research on the context and process of essay writing demonstrates its utility in developing reflection and self-appraisal. Essay writing teaches students to be evaluative in their writing and in their learning. (SK)

  5. Informative, Compare and Contrast, and Persuasive Essay Composing of Fifth and Seventh Graders: Not All Essay Writing Is the Same

    Science.gov (United States)

    Davidson, Matt; Berninger, Virginia

    2016-01-01

    Typically developing writers in fifth (n = 110, M = 10 years 8 months) or seventh (n = 97, M = 12 years 7 months) grade wrote informative, compare and contrast, and persuasive essays for which the content was held constant--two mountains with a history of volcanic eruption. Relevant background knowledge was provided by reading text and showing…

  6. Influence of Cultural Norms and Collaborative Discussions on Children's Reflective Essays

    Science.gov (United States)

    Kim, Il-Hee; Anderson, Richard C.; Miller, Brian; Jeong, Jongseong; Swim, Terri

    2011-01-01

    This study investigated the influence of culture and discussion participation on rhetorical patterns in the reflective essays of 238 Korean and 196 American 4th-graders. Results showed significant differences between Korean children's essays and American children's essays in types of reasons, uses of argument elements, and uses of rhetorical…

  7. Essays on pricing electricity and electricity derivatives in deregulated markets

    Science.gov (United States)

    Popova, Julia

    2008-10-01

    This dissertation is composed of four essays on the behavior of wholesale electricity prices and their derivatives. The first essay provides an empirical model that takes into account the spatial features of a transmission network on the electricity market. The spatial structure of the transmission grid plays a key role in determining electricity prices, but it has not been incorporated into previous empirical models. The econometric model in this essay incorporates a simple representation of the transmission system into a spatial panel data model of electricity prices, and also accounts for the effect of dynamic transmission system constraints on electricity market integration. Empirical results using PJM data confirm the existence of spatial patterns in electricity prices and show that spatial correlation diminishes as transmission lines become more congested. The second essay develops and empirically tests a model of the influence of natural gas storage inventories on the electricity forward premium. I link a model of the effect of gas storage constraints on the higher moments of the distribution of electricity prices to a model of the effect of those moments on the forward premium. Empirical results using PJM data support the model's predictions that gas storage inventories sharply reduce the electricity forward premium when demand for electricity is high and space-heating demand for gas is low. The third essay examines the efficiency of PJM electricity markets. A market is efficient if prices reflect all relevant information, so that prices follow a random walk. The hypothesis of random walk is examined using empirical tests, including the Portmanteau, Augmented Dickey-Fuller, KPSS, and multiple variance ratio tests. The results are mixed though evidence of some level of market efficiency is found. The last essay investigates the possibility that previous researchers have drawn spurious conclusions based on classical unit root tests incorrectly applied to

  8. Three Essays Examining Household Energy Demand and Behavior

    Science.gov (United States)

    Murray, Anthony G.

    This dissertation consists of three essays examining household energy decisions and behavior. The first essay examines the adoption of energy efficient Energy Star home appliances by U.S. households. Program effectiveness requires that consumers be aware of the labeling scheme and also change their purchase decisions based on label information. The first essay examines the factors associated with consumer awareness of the Energy Star label of recently purchased major appliances and the factors associated with the choice of Energy Star labeled appliances. The findings suggest that eliminating identified gaps in Energy Star appliance adoption would result in house electricity cost savings of $164 million per year and associated carbon emission reductions of about 1.1 million metric tons per year. The second essay evaluates household energy security and the effectiveness of the Low-Income Home Energy Assistance Program (LIHEAP), the single largest energy assistance program available to poor households within the United States. Energy security is conceptually akin to the well-known concept of food security. Rasch models and household responses to energy security questions in the 2005 Residential Energy Consumption Survey are used to generate an energy insecurity index that is consistent with those found in the food insecurity literature. Participating in LIHEAP is found to significantly reduce household energy insecurity score in the index. Further, simulations show that the elimination of the energy assistance safety net currently available to households increases the number of energy insecure house- holds by over 16 percent. The third essay develops a five equation demand system to estimate household own-price, cross-price and income elasticities between electricity, natural gas, food at home, food away from home, and non-durable commodity groups. Household cross-price elasticities between energy and food commodities are of particular importance. Energy price shocks

  9. Tomografia computadorizada no diagnóstico da otosclerose retrofenestral Computed tomography in the diagnosis of retrofenestral otosclerosis

    Directory of Open Access Journals (Sweden)

    Andy de Oliveira Vicente

    2004-01-01

    Full Text Available OBJETIVO: Identificar os principais achados tomográficos da otosclerose retrofenestral. MÉTODO: Estudo prospectivo multicêntrico com tomografia computadorizada (TC de ossos temporais em 54 pacientes com diagnóstico clínico e cirúrgico de otosclerose. Foi realizada uma análise tomográfica, em que foi avaliada a utilidade da TC no diagnóstico radiológico da otosclerose retrofenestral, sendo verificados os principais sítios de lesões dessa doença. Foram incluídos neste estudo 22 pacientes submetidos à TC de ossos temporais para investigação de outras afecções otológicas, que constituíram o grupo controle. RESULTADOS: Os achados tomográficos foram bilaterais na maioria dos casos e o foco retrofenestral mais prevalente foi o foco pericoclear. CONCLUSÕES: A TC monstrou-se útil na identificação dos focos retrofenestrais. A evidência tomográfica desses focos juntamente com o envolvimento endosteal da cóclea podem sugerir uma maior atividade da doença.AIM: To identify the main tomographic findings of retrofenestral otosclerosis. METHODS: A prospective and multicentric study using computed tomography (CT of the temporal bone in 54 patients with a clinical and surgical diagnosis of otosclerosis. A tomographic analysis has been performed to evaluate the utility of CT scans in diagnosing retrofenestral otosclerosis, verifying the sites of predilection for otosclerotic lesions. In this study, 22 patients undergone CT scans of temporal bones have been included in order to investigate other otologic diseases and have constituted the control group. RESULTS: The tomographic findings were mostly bilateral and the retrofenestral focus more prevalent was the pericochlear focus. CONCLUSIONS: The CT scan was useful in the identification of the retrofenestral focuses. The evidence of this focuses and the presence of the endosteal involvement of the cochlea can suggest a higher activity of the disease.

  10. The wave function essays on the metaphysics of quantum mechanics

    CERN Document Server

    Albert, David Z

    2013-01-01

    This is a new volume of original essays on the metaphysics of quantum mechanics. The essays address questions such as: What fundamental metaphysics is best motivated by quantum mechanics? What is the ontological status of the wave function? Does quantum mechanics support the existence of any other fundamental entities, e.g. particles? What is the nature of the fundamental space (or space-time manifold) of quantum mechanics? What is the relationship between the fundamental ontology of quantum mechanics and ordinary, macroscopic objects like tables, chairs, and persons? This collection includes a comprehensive introduction with a history of quantum mechanics and the debate over its metaphysical interpretation focusing especially on the main realist alternatives.

  11. Photo Essay: Pictures for Our “Honorable American Friends”

    Directory of Open Access Journals (Sweden)

    Samuel Hideo Yamashita

    2013-03-01

    Full Text Available An American minister’s outrage over a celebration of the dropping of the atomic bombs on Japan led to a generous gift of school supplies for students at a primary school in Hiroshima City. In gratitude, students at this school sent dozens of drawings and paintings to the minister’s church. This exchange was inspired by the minister’s Unitarian faith and moral decency and realized through the generosity of his parishioners. But the Japanese children’s artwork can be read in several other ways that greatly complicate the story and implicate Cold War narratives of victory and defeat as well as powerful memories of the destruction, death, and suffering caused by the war. This essay accompanies the “Hiroshima Children’s Drawings” photo essay featured in the March 2013 issue of Cross-Currents: East Asian History and Culture Review...

  12. Proptose ocular como manifestação clínica de tumores malignos extra-orbitários: estudo pela tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Baptista Ana Célia

    2003-01-01

    Full Text Available Doenças sistêmicas, doenças orbitárias primárias e lesões extra-orbitárias com extensão secundária para a órbita podem causar proptose ocular. Foram estudados, por tomografia computadorizada, 11 pacientes com proptose ocular causada por tumores malignos extra-orbitários, sem qualquer tratamento prévio do tumor. Houve predomínio de neoplasias não-epiteliais (82%, tendo sido três rabdomiossarcomas (27% e três linfomas não-Hodgkin (27%. Outros sarcomas estiveram presentes em dois casos (18%, seguidos por linfoma de Burkitt (9%, carcinoma epidermóide (9% e carcinoma pouco diferenciado (9%. Nove tumores (82% tiveram origem nas cavidades sinonasais, a maioria (cinco casos com origem no seio etmoidal. Proptose ocular foi a única alteração oftálmica em quatro casos (36%, e um paciente teve proptose ocular bilateral como único sinal da doença. Dezessete órbitas foram acometidas pelos 11 tumores, já que seis pacientes tiveram comprometimento orbitário tumoral bilateral. Os tumores se estenderam às órbitas preferencialmente através da parede óssea orbitária (16 órbitas; 94%. Das 17 órbitas comprometidas, a maioria (59% teve todos os compartimentos lesados. Em 16 órbitas o tumor apresentou situação extraconal. À tomografia computadorizada, proptose ocular esteve presente em 15 das 17 órbitas (88%, tendo sido bilateral em quatro casos (oito órbitas. Houve predomínio de proptose ocular grau 2 à tomografia computadorizada (sete pacientes; 47%. Um total de 44 regiões crânio-faciais foi comprometido, além da órbita e do sítio de origem da neoplasia, indicando a grande extensão loco-regional desses tumores no momento do diagnóstico.

  13. Análise da castanha do cajueiro por tomografia de ressonância magnética Cashew nut analysis by magnetic resonance tomography

    Directory of Open Access Journals (Sweden)

    João Rodrigues de Paiva

    2004-11-01

    Full Text Available O objetivo deste trabalho foi avaliar a técnica de tomografia de ressonância magnética na análise de castanhas de cajueiro, em relação ao método tradicional, visando sua aplicação na seleção de clones. Amostras de castanhas de 40 clones de cajueiro comum, colhidas na safra de 2002, foram analisadas por ambos os métodos. Pelo método tradicional, a maioria dos clones apresentou altos e médios valores dos indicadores industriais massa de castanha, massa de amêndoa e rendimento industrial e baixos índices de quebra das amêndoas. Pela tomografia, a maioria dos clones apresentou castanhas com espaços vazios entre a amêndoa e o endocarpo, que podem proteger a amêndoa durante a decorticação. Os resultados dos dois métodos foram complementares, e a tomografia, além de alternativa promissora na avaliação da qualidade de castanha, pode subsidiar outras áreas de pesquisa relacionadas ao estudo da castanha.The objective of this work was to evaluate the technique of magnetic resonance tomography for cashew nut analysis, compared to the traditional method of clone selection. Samples of cashew nut from 40 clones harvested in 2002 were analyzed using both methods. Using traditional method most of clones showed high and medium values of the industrial indicators nut and seed mass and industrial yield and low values of seed breakage. By magnetic resonance tomography majority of clones showed cashew nuts with empty spaces between the nut and the endocarp, which can protect the seed during decortication. The results for the two methods were complementary and the tomography, besides being a promising option for the quality evaluation of cashew nut, can give support to other researches related to cashew nut study.

  14. Bayesian interference in heterogeneous dynamic panel data models: three essays.

    OpenAIRE

    Ciccarelli, Matteo

    2001-01-01

    The task of this work is to discuss issues conceming the specification, estimation, inference and forecasting in multivariate dynamic heterogeneous panel data models from a Bayesian perspective. Three essays linked by a few conraion ideas compose the work. Multivariate dynamic models (mainly VARs) based on micro or macro panel data sets have become increasingly popular in macroeconomics, especially to study the transmission of real and monetary shocks across economies. This great use...

  15. Three essays in labour economics and the economics of education

    OpenAIRE

    Javdani Haji, Mohsen

    2012-01-01

    This thesis consists of three empirical essays. The first chapter is focused on the economics of gender, and the other two chapters are focused on the economics of education. A common theme in all these three chapters is studying the outcomes of disadvantaged groups in society, with an eye to policy interventions that could improve these outcomes. The first chapter examines whether women face a glass ceiling in the labour market, which would imply that they are under-represented in high wag...

  16. Three Essays on Strategic Considerations for Product Development

    OpenAIRE

    Sawhill, James Winslow

    2010-01-01

    This dissertation is composed of three essays focused on strategic considerations for product development. In chapter I, I address the question of whether consumers equally weigh capital and operating costs when purchasing durable goods. This trade off is important to manufacturers as they determine how much of their product design and production costs should be dedicated to keeping operating costs low. I test this empirically using data from the automobile industry. Chapter II is also an...

  17. Tourism in a World of Risks (Essay Review

    Directory of Open Access Journals (Sweden)

    Maximiliano E. KORSTANJE

    2016-06-01

    Full Text Available Though tourism combines curiosity with security, over the recent decades, we are facing an inflation of risks that caused big problems for policy makers and officials interested in promoting tourism in their respective nations. As a result of this, one might speculate that the future of industry is uncertain. This essay review explores the already existent literature in risk perception applied on tourism fields as well as introduces the theory of attachment to explain how the world is constructed.

  18. Three essays on young married women in Egypt

    OpenAIRE

    Abdel Fattah, Dina

    2017-01-01

    This thesis empirically studies three aspects of marriage pertaining to young women in Egypt using a young people specific Survey of Young People in Egypt 2009. \\ud \\ud The first essay investigates the determinants of the marriage valuation of young women in Egypt through the value of the jewellery received on marriage. The empirical analysis focuses on the role of circumcision, kinship marriages and the competitiveness in the marriage market in determining the marriage valuation of young wom...

  19. Improving Undergraduates’ Argumentative Group Essay Writing through Self-assessment

    OpenAIRE

    Yong Mei Fung; Hooi Chee Mei

    2015-01-01

    When writing an argumentative essay, writers develop and evaluate arguments to embody, initiate, or simulate various kinds of interpersonal and textual interaction for reader consideration (Wu & Allison, 2003). This is quite challenging for English as a second language (ESL) learners. To improve the quality of their writing, students need to review their draft throughout the writing process. This study aimed to investigate the effect of self-assessment in group writing and how group work impr...

  20. 2011 JSOU and NDIA SO/LIC Division Essays

    Science.gov (United States)

    2011-07-01

    JSOU) partnered with the Special Operations and Low Intensity Conflict (SO/LIC) Chapter of the National Defense Industrial Association (NDIA) in...for the 2011 National Defense Industrial Association’s Special Operations and Low Intensity Conflict Chapter (NDIA SO/LIC) Essay Contest. Photo...Barikay Bekhsang Bezhandoke Tambil (1) Tambi l (2) Sunjet Saraw Landay Loy Karez Ghbargay Chenar (1) Hotal Shir inak Chineh Chuhul Cagey (1) Maluk Surkh Bed

  1. Essays on Inequality and the Economics of Education

    OpenAIRE

    Chaturvedi, Mayuri

    2017-01-01

    This dissertation discusses some of the causes and consequences of inequality, vertical and horizontal, some theoretically and others empirically. In doing so, I try to touch upon old and new themes in the economics literature, as old as rent seeking and as new as the effect of cultural norms. The first essay reflects on the inequality of opportunity as manifest in the quality of education available to families in India. The paper explores the relative roles of the quality of schools and hous...

  2. Land, Labor and Technology: Essays in Development Economics

    OpenAIRE

    Fernando, Asanga Nilesh

    2015-01-01

    Many of the world's rural poor make a living from agriculture. Consequently, the productivity of agriculture and non-agricultural employment opportunities are important determinants of rural poverty and the subject matter of the three essays in this dissertation. The first chapter in this dissertation estimates the long-term causal effect of inheriting land in rural India. Using quasi-experimental methods, I find that inheriting land greatly influences occupational trajectories and can suppre...

  3. Incremental product development : four essays on activities, resources, and actors

    OpenAIRE

    Olsen, Nina Veflen

    2006-01-01

    Most innovations are incremental, and incremental innovations play an important role for the firm. In spite of that, traditional NPD studies most often emphasize moderate to highly innovative product development projects. In this dissertation the overall objective is to increase our understanding of incremental innovation. The dissertation is organized around four essays that emphasize different aspects of incremental innovation. NPD in hotels, retailers and food manufact...

  4. Essays on Currency Competition, Institutional Restrictions and Exchange Rates

    OpenAIRE

    Bhattacharya, Arghya

    2017-01-01

    This dissertation consists of three essays on currency competition, institutional restrictions and exchange rates. When faced with currency competition, a country's government has two tools at its disposal: reduce the level of inflation or place institutional barriers to the use of foreign currency. In the first chapter, I propose a two-country, two-currency New Monetarist model to study currency competition. I model institutional barriers as a `tax' on the real value of foreign currency hol...

  5. Essays on the Effects of Medical Marijuana Laws

    OpenAIRE

    Smart, Rosanna

    2016-01-01

    Over half of the US states have adopted "medical marijuana" laws (MMLs), and 58% of Americans now favor marijuana legalization. Despite public support, federal law continues to prohibit the use and sale of marijuana due to public health concerns of increased dependence and abuse, youth access, and drugged driving. These essays contribute toward understanding the likely health consequences of marijuana liberalization using evidence from MMLs.Chapter 1 -- Growing Like Weed: Explaining Variation...

  6. Unusual lesions that distend the knee joint: pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Luana T. Barros de, E-mail: luanatbl@hotmail.com [Universidade Federal de Alagoas (HUPAA/UFAL), Maceio (Brazil). Hospital Universitario; Albuquerque Filho, Eolo Santana de; Batista, Laecio Leitao [Universidade Federal de Pernambuco (UFPE), Recife (Brazil). Hospital das Clinicas; Moraes, Talita Peixoto de [Clinica Derbimagem, Recife, PE (Brazil); Pereira, Bruno Perez Guedes [Instituto de Medicina Integral Professor Fernando Figueira (IMIP), Recife, PE (Brazil)

    2016-09-15

    The high number of knee imaging exams at radiology clinics, together with the wide variety of knee disorders, calls for expanding the knowledge about the less common lesions seen in routine diagnostic practice. The purpose of this pictorial essay was to illustrate unusual lesions that distend the knee joint, selected by relevance and evaluated with multiple imaging modalities, including X-ray, computed tomography, and magnetic resonance imaging, as well as to perform a brief review of the literature. (author)

  7. Virtual Reality: A Definition History - A Personal Essay

    OpenAIRE

    Bryson, Steve

    2013-01-01

    This essay, written in 1998 by an active participant in both virtual reality development and the virtual reality definition debate, discusses the definition of the phrase "Virtual Reality" (VR). I start with history from a personal perspective, concentrating on the debate between the "Virtual Reality" and "Virtual Environment" labels in the late 1980's and early 1990's. Definitions of VR based on specific technologies are shown to be unsatisfactory. I propose the following definition of VR, b...

  8. Review Essay: Situational Analysis—Strauss Meets Foucault?

    OpenAIRE

    Rainer Diaz-Bone

    2012-01-01

    With the (German translation) of the volume "Situational Analysis" by Adele CLARKE, a new approach to the development of Grounded Theory Methodology (GTM) is presented. CLARKE radicalizes the methodological standpoint of classical pragmatism. She integrates structuralist and post-structuralist analytic elements into GTM. This review essay critically analyzes this new integration and employs the methodological notion of the "theory/methods package" introduced by CLARKE, which denotes the cohes...

  9. Essays on the Globalization of Production and International Trade

    OpenAIRE

    Kovaříková Arro, Anu

    2009-01-01

    This dissertation consists of three essays on the globalization of production and international trade. In the economic literature, globalization has traditionally been represented by international trade, foreign direct investment and factor mobility, although more recently it has also come to relate to the fragmentation of production. Specifically, final good firms fragment their production such that they buy the intermediate products from outside producers, giving rise to horizontally specia...

  10. THE EFFECTS OF TEACHING CRITICAL THINKING ON STUDENTS’ ARGUMENTATIVE ESSAY

    Directory of Open Access Journals (Sweden)

    A’am Rifaldi Khunaifi

    2015-03-01

    Full Text Available This study is directed to find out whether teaching critical thinking affects the writing ability of argumentative essay. This research employed quasi experimental design as it was intended to measure the effects of the strategy on the students’ ability in writing argumentative essay. The samples of the study were the students of class A and B enrolled in the seventh semester of the English Education Department of State Islamic College of Palangka Raya. To collect the data needed, it was used test as the instrument; it was Academic Writing for IELTS Test. The data were processed and analyzed by using SPSS 19.0 statistic technique of independent t-test and paired-sample t-test, and the analized data were concluded. From the result of the test, the independent t-test calculation in posttest scores in both groups shows that the significance value is higher than level of significance (0.194 > 0.05. It indicates that there is no significant difference between experimental and control groups. Moreover, the paired t-test calculation shows the result of paired sample test (0.000 < 0.05 in which there is a significant difference between pretest and posttest scores in experimental group after having treatments. Keywords: critical thinking, writing ability, argumentative essay

  11. Automated Guidance for Thermodynamics Essays: Critiquing Versus Revisiting

    Science.gov (United States)

    Donnelly, Dermot F.; Vitale, Jonathan M.; Linn, Marcia C.

    2015-12-01

    Middle school students struggle to explain thermodynamics concepts. In this study, to help students succeed, we use a natural language processing program to analyze their essays explaining the aspects of thermodynamics and provide guidance based on the automated score. The 346 sixth-grade students were assigned to either the critique condition where they criticized an explanation or the revisit condition where they reviewed visualizations. Within each condition, the student was assigned one of two types of tailored guidance based on the sophistication of their original essay. Both forms of guidance led to significant improvement in student understanding on the posttest. Guidance was more effective for students with low prior knowledge than for those with high prior knowledge (consistent with regression toward the mean). However, analysis of student responses to the guidance illustrates the value of aligning guidance with prior knowledge. All students were required to revise their essay as an embedded assessment. While effective, teachers involved in this study reported that revising is resisted by students and does not align with typical, vocabulary-focused classroom writing activities.

  12. Telling Lives in Science: Essays on Scientific Biography

    International Nuclear Information System (INIS)

    Harman, Peter

    1997-01-01

    This collection of ten essays by historians of science, several of them biographers, is concerned with the role of scientific biography in forming conceptions of science and scientists. The essays include studies of the biographies of individual scientists, assessments of the aims and style of scientific portraits in different historical contexts, examinations of changing biographical interpretations of scientists, and much discussion of the methodological issues involved in the writing of scientific biographies. Many historians consider biography to be an ambiguous genre, its appeal based on nostalgia rather than history, with a focus on personality rather than historical context, but the biographer can reply that scientific biography reveals the practice of science at its most fundamental level. Indeed, scientific biography has provided a powerful medium in which public conceptions of science have been established. Einstein observed that 'the essential being of a man of my type lies in what he thinks and how he thinks', and his Autobiographical Notes suppress personality in favour of physics. But the biographer may see matters differently, and wish to integrate the public and the private life of the scientist. In their substantial introduction the editors discuss these and other problems, and the book is directed to the professional concerns of historians of science. While there is little here on the history of physics, Geoffrey Cantor's essay on public images of Faraday as constructed in popular biographies, a discussion of conflicting portraits of Faraday as romantic genius or hard-working slogger, may interest readers of this journal. (book review)

  13. On St. Sava’s (svetosavski redaction of Holy Monks images in Mileševa church narthex: Contribution to research in iconographic common places in the Nemanjićs’ church foundation

    Directory of Open Access Journals (Sweden)

    Milanović Vesna D.

    2002-01-01

    Full Text Available This paper discusses the possibility of further completing the to-date analyses on the content and scope of the painting program in the Mileševa narthex, representing a striking two-band frieze of the images of holy monks. This new examination does not ignore the already recognized distinguishing marks, and pays special attention to investigating possible relationships and links with the solutions in some other monuments of the same era not having been previously researched in detail. The undertaking of the author was in this case determined by an attempt to look into and throw some light onto the hardly discernible, and to date unexplained, original content of a smaller, only fragmentarily saved, and indeed the most challenging segment of that numerous and complex gathering of the images of holy monks. That segment included several extremely damaged and rather faded images of holy monks in the lower zone of the narthex southern wall (the band of standing figures, and the figure in the southern end of the adjoining, west wall, in all probability, belonged to it as well. Furthermore, according to the faded traces of previous iconographic characteristics of these figures, it could be seen that they constituted a compact and specific group with regard to the nearest images or groups of images, related to them by belonging to the same, more general category of the holiness. Bearing in mind the damage to heads and faces, as well as the disappearance of the inscription with the names and texts on the scrolls in their hands, the only way to discovering, or at least to closer determining the identity of the images presented was by means of to date unused circumstantial data, which could be provided by more extensive iconographic materials from the other monuments of the time. This way was, up to a certain extent, already open by previous numerous notes of the researchers on the essential closeness of solutions in Mileševa with those of Studenica and

  14. CT findings after normal and unsuccessful functional endoscopic sinus surgery; Ruolod della tomografia computerizzata dopo chirurgia funzionale dei seni paranasali: rilievi normali e valutazioni degli insuccessi chirurgici

    Energy Technology Data Exchange (ETDEWEB)

    Scribano, E.; Ascenti, G.; Bellinvia, A.; Mazziotti, S.; Lamberto, S. [Messina Univ., Messina (Italy). Ist. di Scienze Radiologiche; Cascio, F. [Messina Univ., Messina (Italy). Ist. di Otorinolaringoiatria

    1999-09-01

    The paper investigates the functional endoscopic sinus surgery with the Messer-linger's technique which treats benign or inflammatory diseases of paranasal sinuses resistant to medical therapy. The goal of this type of surgery is to open the obstructed sinus ostia and restore normal aeration and mucociliary clearance. The computerized tomography permits an accurate assessment of extension and results of functional endoscopic sinus surgery. [Italian] L'articolo discute l'uso della tecnica di Messerklinger nella chirurgia funzionale endoscopica dei seni paranasali per il trattamento delle malattie benigne e delle infiammazioni croniche. Essa disostruisce gli osti sinusali ripristinando la normale areazione e la pulizia mucociliare. La tomografia computerizzata consente di valutare l'estensione e i risultati del trattamento chirurgico funzionale, soprattutto nel caso di insuccesso terapeutico, rilevando malattia nasosinusale ricorrente e-o recidiva.

  15. Sarcoidose pulmonar: achados na tomografia computadorizada de alta resolução Pulmonary sarcoidosis: high-resolution computed tomography findings

    Directory of Open Access Journals (Sweden)

    Bruno Barcelos da Nóbrega

    2005-06-01

    Full Text Available A sarcoidose é uma doença sistêmica de causa indeterminada, caracterizada por granulomas não-caseosos. Embora possa afetar qualquer órgão, esta doença tem sua morbi-mortalidade relacionada principalmente ao acometimento pulmonar, presente em 80% a 90% dos pacientes. Este artigo ilustra as principais manifestações pulmonares da sarcoidose na tomografia computadorizada de alta resolução, incluindo as formas típicas e atípicas.Sarcoidosis is a systemic disease of unknown etiology, characterized by noncaseating granulomas. Although it may affect any organ, morbidity and mortality are most commonly related to pulmonary involvement, which is found in 80-90% of patients. This study illustrates the principal manifestations of sarcoidosis seen in high-resolution computed tomography scans, including typical as well as atypical forms.

  16. Seguimento de portadores de coriorretinopatia serosa central por meio da tomografia de coerência óptica Evaluation of central serous chorioretinopathy with optical coherence tomography

    Directory of Open Access Journals (Sweden)

    Otacílio de Oliveira Maia Júnior

    2006-04-01

    Full Text Available OBJETIVO: Avaliar a tomografia de coerência óptica como método objetivo de diagnóstico e de seguimento da coriorretinopatia serosa central. MÉTODOS: Estudo observacional descritivo de 16 (dezesseis olhos de portadores de coriorretinopatia serosa central unilateral, em fase aguda. Estes pacientes foram submetidos à medida da acuidade visual e a exame oftalmológico completo, incluindo biomicroscopia da mácula, angiofluoresceinografia e tomografia de coerência óptica. Nenhum dos pacientes foi submetido a qualquer tipo de tratamento. RESULTADO: Dos 16 casos consecutivos de coriorretinopatia serosa central, 12 pacientes completaram o seguimento até a resolução da doença. A idade variou entre 27 e 50 anos, com média de 38,9 anos. A predominância foi do sexo masculino. Na tomografia de coerência óptica, o descolamento da retina neurossensorial foi observado em todos os casos e 33,3% dos pacientes apresentaram descolamento do epitélio pigmentado da retina. Houve diferença significativa em todas as variáveis estudadas, constatando melhora na acuidade visual, diminuição na espessura e no volume macular na resolução da doença. CONCLUSÃO: Tomografia de coerência óptica mostrou boa eficácia para detectar e quantificar alterações maculares em olhos com coriorretinopatia serosa central, podendo ser útil em avaliações clínicas na fase aguda e na resolução da doença.PURPOSE: To evaluate optical coherence tomography as an objective diagnostic and follow-up method for central serous chorioretinopathy. METHODS: Observational descriptive study of 16 (sixteen eyes of 16 patients with unilateral acute central serous chorioretinopathy. These patients had their visual acuity measured and complete ophthalmological examination was performed, including macular slit lamp examination, angiofluoresceinography and optical coherence tomography. No treatment was given to any patient. RESULTS: Of the 16 central serous chorioretinopathy eyes

  17. CT diagnosis of subphrenic abscess after splenectomy for trauma; Ruolo della tomografia computerizzata nella valutazione degli ascessi subfrenici dopo splenectomia post-traumatica

    Energy Technology Data Exchange (ETDEWEB)

    Salzano, A. [Ospedale Loreto-Mare, Neaples (IT). Serv. di Radiologia] [and others

    1999-09-01

    The paper studies subphrenic inflammatory abscesses and splenic fluid collections after splenectomy for trauma. These complications may appear early or late postoperatively; they are easily demonstrated with computerized tomography, which permits accurate spatial assessment of the lesions and appropriate treatment with percutaneous drainage. It has been also investigates the diagnostic accuracy of the CT in subphrenic inflammatory conditions after emergency splenectomy for traumatic spleen rupture and found that CT is a precious tool for rapid and easy diagnosis and follow-up of subphrenic abscesses treated with percutaneous drainage. [Italian] Scopo del lavoro e' di valutare il ruolo della tomografia computerizzata nelle flogrosi subfreniche secondarie a splenectomia d'urgenza per rottura traumatica della milza, documentando come tale metodica risulti accurata nel diagnosticare e monitorare in modo semplice e rapido l'evoluzione e il controllo degli ascessi subfrenici trattati con drenaggio percutaneo.

  18. Paracoccidioidomicose pulmonar: relato de caso clínico com aspetos em tomografia computorizada de alta resolução

    Directory of Open Access Journals (Sweden)

    M. Armas

    2012-07-01

    Full Text Available Resumo: A Paracoccidioidomicose é uma micose sistémica endémica nas áreas rurais da América Latina, uma fonte importante de imigrantes e destino de emigração e turismo europeu, a maioria dos casos ocorrendo no Brasil, Argentina, Venezuela e Colômbia. Os autores descrevem o caso clínico de um paciente com 43 anos, anteriormente emigrado na Venezuela e residente em Portugal há 8 anos, que se apresenta com lesão cutânea isolada. Embora sem queixas relevantes do foro respiratório, apresentava extensas lesões do parênquima pulmonar caracterizadas por tomografia computorizada de alta resolução (TCAR. Foi realizada biópsia da lesão cutânea e exame micológico da expetoração que revelaram infeção por Paracoccidioides brasiliensis (PB. Abstract: Paracoccidioidomycosis is a systemic mycosis which is endemic in rural areas of Latin America, an important European source of immigrants and a growing European touristic destination as well, with most cases occurring in Brazil, Argentina, Venezuela and Colombia. The authors report a case of a 43 year old man who previously worked in Venezuela and is living in Portugal for 8 years, presenting with a single cutaneous lesion. Despite the absence of valuable respiratory complaints, severe lung damage was found with high-resolution computed tomography (HRCT. Biopsy of the cutaneous lesion and mycologic sputum examination were performed revealing Paracoccidioides brasiliensis infection. Palavras-chave: Paracoccidioidomicose, Paracoccidioides brasiliensis, Fibrose pulmonar, Tomografia computorizada de alta resolução, Keywords: Paracoccidioidomycosis, Paracoccidioides brasiliensis, Pulmonary fibrosis, High-resolution computed tomography

  19. Tomografia computadorizada em pacientes portadores de neurocisticercose com hipertensão intracraniana por hidrocefalia obstrutiva: comparação com ventriculografia com Dimer-X

    Directory of Open Access Journals (Sweden)

    Benedicto Oscar Colli

    1984-06-01

    Full Text Available Estudo das alterações observadas nas tomografias computadorizadas (TCs de 16 casos de neurocisticercose, com hipertensão intracraniana por hidrocefalia. Todos os casos foram submetidos a radiografias simples do crânio e 12, à ventriculografia com Dimer-X. Nas radiografias simples foram observados sinais de hipertensão intracraniana em 7, calcificações em um, e d foram normais. A TC mostrou parênquima cerebral normal em 9 casos e nos 7 restantes áreas hipodensas arredondadas de tamanho variado, com ou sem retenção de contraste na periferia, e/ou calcificações esparsas no parenquima. Hidrocefalia foi a única alteração observada no sistema ventricular nos casos em que o exame foi realizado previamente à derivação do LCR. As ventriculografias foram analisadas em trabalho anterior e permitiram localizar e determinar as características da obstrução e a presença de massas ocupando espaço dentro dos ventrículos. A comparação das ventriculografias e TCs realizadas na mesma época evidenciou que a primeira fornece melhores informações sobre o sistema ventricular mas, por outro lado, a tomografia fornece informações adicionais sobre o parênquima cerebral. A TC e a ventriculografia são exames que se completam na avaliação e no diagnóstico destes pacientes.

  20. The SAT® Essay and College Performance: Understanding What Essay Scores Add to HSGPA and SAT. Research Report 2012-9 (REV: 4-2013)

    Science.gov (United States)

    Shaw, Emily J.; Kobrin, Jennifer L.

    2013-01-01

    This study examines the relationship between students' SAT essay scores and college outcomes, including first-year grade point average (FYGPA) and first-year English course grade average (FY EngGPA), overall and by various demographic and academic performance subgroups. Results showed that the SAT essay score has a positive relationship with both…

  1. La recepción de la tradición hispánica de la Inmaculada Concepción en Nueva España: el tipo iconográfico de la "Tota Pulchra" = The Reception of the Hispanic Tradition of the Immaculate Conception in New Spain: the Iconographic Type of "Tota Pulchra"

    Directory of Open Access Journals (Sweden)

    Sergi Doménech García

    2015-12-01

    Full Text Available El presente artículo aborda la tradición visual de la Tota pulchra en el virreinato de Nueva España, tipo iconográfico que en el siglo XVI significó la llegada de una imagen propia para la Inmaculada, siendo muestra de la tradición visual hispánica pero su continuidad y variante muestra unas características propias para el arte novohispano. La confección de esta tipología había tenido lugar después de diversas discusiones. La llegada de este asunto al virreinato americano tuvo lugar con la evangelización. Ello incluye, igualmente, una continuidad inusual del tipo en los siglo XVII y XVIII, cuando en el arte peninsular se había dejado de lado. El artículo analiza la formación, continuidad y variantes de este tipo iconográfico en Nueva España observando también su impacto en la literatura y oratoria sagrada. The aim of this article is approach the visual tradition of Tota pulchra in the Viceroyalty of New Spain. During the 16th century this iconographic type took meaning for an own image for the Immaculate, being a sample of the Hispanic visual tradition, but his continuity and his variant shows own characteristics for the art of New Spain features. The origin of this iconographic type took place after various iconographic discussions. The arrival of this subject to the American viceroy was happened during the evangelization. This includes, at the same time, an unusual type continuity in the 17th and 18th century, when it had been shelved in the Iberian art. The article analyses the formation, continuity and variants of this iconographic type in the Viceroyalty of New Spain also observing its impact on literature and sacred oratory.

  2. Avaliação da epífora de cães usando dacriocistografia e tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Nivea M.G. Vieira

    2015-12-01

    Full Text Available Resumo: A avaliação da epífora pode ser feita por exames clínicos, testes de excreção lacrimal, exames contrastados, como avaliação radiológica e estudo tomográfico; estes dois últimos permitem análise minuciosa das estruturas. O presente estudo teve como objetivo avaliar a via lacrimal excretora com uso de radiografia e tomografia computadorizada contrastadas, feitas em animais com epífora, comparando-se com animais sadios, sem essa afecção. Foram utilizados 20 cães, de raças e pelagens variadas, machos e fêmeas, com peso de 1 a 20 kg, com 0,7 a 8 anos de idade, apresentando epífora (grupo epífora - GE. Como grupo de controle (GC, foram utilizados 15 cães, sem alterações clínicas de drenagem do sistema lacrimonasal de raças e pelagens variadas, machos e fêmeas, pesando 1 a 20 kg, com 0,7 a 8 anos. Foi proposta a divisão do sistema de drenagem lacrimal em quatro regiões. Na região 1, o GE teve 29 (76,3% animais com dilatação visibilizada pelo R-X e 32 (84,2% pela TC; no GC, 4 (12,5% no R-X e 1 (3,1% na TC demonstraram dilatação. Na região 3, 13 (34,2% cães evidenciaram dilatação do DLN no R-X e 14 (36,8% na TC; e 21 (55,3% comunicação do ducto lacrimonasal com o seio nasal pelo R-X e 28 (73,7% pela TC. Já no GC, 15 (46,9% pelo R-X e 22 (68,7% pela TC possuíam comunicação do ducto lacrimonasal com o seio nasal. Concluiu-se que: dilatações também podem ser observadas em alguns cães sem sinal clínico da afecção; comunicação do ducto lacrimonasal com o seio nasal não indica alteração causadora de epífora, pois está presente em animais com e sem afecção; os dados do presente estudo confirmam que o exame DCG por si pode dar importantes informações, de forma semelhante à TC, devendo-se recorrer à ela apenas quando houver dúvidas sobre lesões ósseas, fraturas e corpos estranhos não detectados pelo primeiro.

  3. Telling Lives in Science: Essays on Scientific Biography

    Energy Technology Data Exchange (ETDEWEB)

    Harman, Peter

    1997-09-01

    This collection of ten essays by historians of science, several of them biographers, is concerned with the role of scientific biography in forming conceptions of science and scientists. The essays include studies of the biographies of individual scientists, assessments of the aims and style of scientific portraits in different historical contexts, examinations of changing biographical interpretations of scientists, and much discussion of the methodological issues involved in the writing of scientific biographies. Many historians consider biography to be an ambiguous genre, its appeal based on nostalgia rather than history, with a focus on personality rather than historical context, but the biographer can reply that scientific biography reveals the practice of science at its most fundamental level. Indeed, scientific biography has provided a powerful medium in which public conceptions of science have been established. Einstein observed that 'the essential being of a man of my type lies in what he thinks and how he thinks', and his Autobiographical Notes suppress personality in favour of physics. But the biographer may see matters differently, and wish to integrate the public and the private life of the scientist. In their substantial introduction the editors discuss these and other problems, and the book is directed to the professional concerns of historians of science. While there is little here on the history of physics, Geoffrey Cantor's essay on public images of Faraday as constructed in popular biographies, a discussion of conflicting portraits of Faraday as romantic genius or hard-working slogger, may interest readers of this journal. (book review)

  4. Essays in Energy Policy: The Interplay Between Risks and Incentives

    Science.gov (United States)

    Lordan-Perret, Rebecca Jane Bishop

    My dissertation considers examples of how social, economic, and political incentives associated with energy production, distribution, and consumption increase the risk of harm to society and the environment. In the first essay, "Why America should move toward dry cask consolidated interim storage of used nuclear fuel," my co-authors and I discuss how the confluence of the U.S. Government and electricity utilities' political and economic incentives created a gridlock preventing a long-term nuclear waste disposal solution. We find that our current policies undermine the safety and security of the nuclear waste, and so, suggest a temporary, consolidated storage solution. In the second essay, "Import-Adjusted Fatality Rates for Individual OECD Countries Caused by Accidents in the Oil Energy Chain," my co-authors and I adopt a technique from the greenhouse gas accounting literature and assign CO2 emissions to the final consumer (rather than the producer) by allocating the risk - measured in fatalities - associated with oil production to the final consumer. The new assignments show that normal methods of tracking oil production impacts only capture part of the actual costs. In the third essay, "Insurgent Attacks on Energy Infrastructure and Electoral Institutions in Colombia," my co-authors and I consider the economic and political incentives that an energy resource create in a conflict environment. Our research shows that insurgents in Colombia, Las Fuerzas Armadas Revolucionarias de Colombia (FARC) and Ejercito de Liberacion Nacional (ELN), strategically time attacks on critical energy infrastructure during elections. These results are the first to quantify insurgent tactics to target critical energy infrastructure, which potentially undermine state capacity and democratic processes.

  5. Essays in theoretical physics in honour of Dirk Ter Haar

    CERN Document Server

    Parry, W E

    2013-01-01

    Essays in Theoretical Physics: In Honour of Dirk ter Haar is devoted to Dirk ter Haar, detailing the breadth of Dirk's interest in physics. The book contains 15 chapters, with some chapters elucidating stellar dynamics with non-classical integrals; a mean-field treatment of charge density waves in a strong magnetic field; electrodynamics of two-dimensional (surface) superconductors; and the Bethe Ansatz and exact solutions of the Kondo and related magnetic impurity models. Other chapters focus on probing the interiors of neutron stars; macroscopic quantum tunneling; unitary transformation meth

  6. Blazing the trail essays by leading women in science

    CERN Document Server

    Ideal, Emma

    2013-01-01

    Name a famous scientist. Got one? Now name a famous physicist. Ok, now name a famous female physicist. Ok, now name a famous living female physicist. Stumped? In Blazing the Trail: Essays by Leading Women in Science, 35 highly successful physicists, engineers, and chemists share their personal histories, their passion for discovery, and their secrets for success with the next generation. Essayists candidly recount their experiences – both positive and negative – with an uplifting tone, focusing on lessons learned along the way. The combination of personal stories and advice sends a powerful message to all young women considering scientific careers: I did it, so can you. Here’s how.

  7. Ten mathematical essays on approximation in analysis and topology

    CERN Document Server

    López-Gómez, J; Ruiz del Portal, F R

    2005-01-01

    This book collects 10 mathematical essays on approximation in Analysis and Topology by some of the most influent mathematicians of the last third of the 20th Century. Besides the papers contain the very ultimate results in each of their respective fields, many of them also include a series of historical remarks about the state of mathematics at the time they found their most celebrated results, as well as some of their personal circumstances originating them, which makes particularly attractive the book for all scientist interested in these fields, from beginners to experts. These gem pieces

  8. Essays on the future in honor of Nick Metropolis

    CERN Document Server

    Rota, Gian-Carlo

    2000-01-01

    This collection represents a unique undertaking in scientific publishing to honor Nick Metropolis. Nick was the last survivor of the World War II Manhattan Project in Los Alamos, and was an important member of the Los Alamos national Laboratory until his death in October, 1999. In this volume, some of the leading scientists and humanists of our time have contributed essays related to their respective disciplines, exploring various aspects of future developments in science and society, philosophy, national security, nuclear power, pure and applied mathematics, physics and biology, particle physics, computing, and information science.

  9. Essay on Methods in Futures Studies and a Selective Bibliography

    DEFF Research Database (Denmark)

    Poulsen, Claus

    2005-01-01

    Futures studies is often conflated with science fiction or pop-futurism. Consequently there is a need for demarcation of what is futures studies and what is not. From the same reason the essay stresses the need for quality control to focus on futures research and its methods: Publications...... in futures studies must be open to critique to be accepted as a research activity. Premises, assumptions, methods and data have to be explicit as a critical discourse, cooperation, and eventual revision is to be carried out by egalitarian means, potentially accessible to all. Problems in this idealistic...

  10. Spine and spinal cord vascular malformations: pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Gariepy, J.-L.; Houdart, E.; Boukobza, M.; Chapot, R.; Cambra, R.; Merland, J.-J. [Hopital Lariboisiere, Service de Neuroradiologie Therapeutique et Interventionalle, Paris (France)

    1999-12-01

    Spine and spinal cord vascular malformations are an uncommon cause of acute, subacute, episodic or progressive myelopathy. They affect all age groups and constitute important clinical entities because of the high morbidity and even mortality associated with them if they are left untreated. These malformations are classified according to their anatomic location and angioarchitecture (Table 1). Today, magnetic resonance imaging (MRI) is the initial radiologic screening procedure of choice for acute or progressive myelopathy. This pictorial essay reviews the radiologic work-up and the imaging features of spinal vascular malformations, as well as the clinical presentation, the probable pathophysiology and the different treatment modalities. (author)

  11. THE EFECTIVENESS OF RHETORIC-BASED ESSAY WRITING TEACHING MODEL WITH CONTEXTUAL APPROACH

    OpenAIRE

    Akbar, Akbar; HP, Achmad

    2015-01-01

    This study aims to develop a rhetoric–based essay writing teaching model with contextual approach in order to improve essay writing skills of students in the English Department of the Education and Teaching Faculty of Lakidende University of Konawe. This instructional model was developed by using research and development. The results show that the model can improve students’ essay writing skills effectively.. It was done in experimental class of the Education and Teaching Faculty of Lakidende...

  12. Graduate admissions essays write your way into the graduate school of your choice

    CERN Document Server

    Asher, Donald

    2012-01-01

    Based on thousands of interviews with successful grad students and graduate admissions officers, Graduate Admissions Essays deconstructs and demystifies the ever-challenging and seemingly more impersonal application process for getting into graduate and scholarship programs. The book presents 50 sample essays in a comprehensive range of subjects, detailed strategies that have proven successful for some of the most notoriously competitive graduate programs in the country, as well as sample letters of recommendation, essays for residencies and fellowships, and postgrad applications.

  13. Essays on market design and strategic behaviour in energy markets

    International Nuclear Information System (INIS)

    Lorenczik, Stefan

    2017-01-01

    The thesis at hand consists of four essays which are divided into two parts. In the first part, consisting of the first two essays, market design issues in electricity markets are discussed. More precisely, it deals with concerns regarding security of supply: First, the concerns regarding the availability of sufficient flexibility to cope with intermittent renewable energy electricity generation. And second, the consequences of insufficient investments signals in energy only markets in interconnected electricity markets. Part two deals with strategic behaviour in spatial natural resource markets. Strategic behaviour and the exertion of market power have always been a matter of concern in energy markets, especially in natural resource markets. The exertion of market power can result in deadweight losses - regulatory bodies try to address this by market regulations aiming for a welfare maximising market outcome. The first problem is to detect collusive behaviour as available data is frequently limited. The second question is how regulatory decisions may influence the market outcome. Both topics are investigated by using the example of the international metallurgical coal market.

  14. Improving Undergraduates’ Argumentative Group Essay Writing through Self-assessment

    Directory of Open Access Journals (Sweden)

    Yong Mei Fung

    2015-10-01

    Full Text Available When writing an argumentative essay, writers develop and evaluate arguments to embody, initiate, or simulate various kinds of interpersonal and textual interaction for reader consideration (Wu & Allison, 2003. This is quite challenging for English as a second language (ESL learners. To improve the quality of their writing, students need to review their draft throughout the writing process. This study aimed to investigate the effect of self-assessment in group writing and how group work improves students’ writing ability. An intact class comprising 22 first-year undergraduates participated in the study.  Data were collected from pre- and post-treatment writing tests, semi-structured interview and reflection entries. The results revealed that self-assessment has a significant effect on students’ writing performance. Group work also enhanced social and cognitive development of the students. This study provides insights into the use of self-assessment in writing class to develop learner autonomy and improve writing ability. Keywords: Argumentative essay, Self-assessment, Learner autonomy, Group writing, ESL learners

  15. An essay on the importance of being nonlinear

    CERN Document Server

    West, Bruce J

    1985-01-01

    One of my favorite quotes is from a letter of Charles Darwin (1887): "I have long discovered that geologists never read each other's works, and that the only object in writing a book is proof of earnestness, and that you do not form your opinions without undergoing labour of some kind. " It is not clear if this private opinion of Darwin was one that he held to be absolutely true, or was one of those opinions that, as with most of us, coincides with our "bad days," but is replaced with a more optimistic view on our "good days. " I hold the sense of the statement to be true in general, but not with regard to scientists never reading each other's work. Even if that were true however, the present essay. would still have been written as a proof of earnestness. This essay outlines my personal view of how nonlinear mathematics may be of value in formulating models outside the physical sciences. This perspective has developed over a number of years during which time I have repeatedly been amazed at how an "accepted" ...

  16. Essays on carbon policy and enhanced oil recovery

    Science.gov (United States)

    Cook, Benjamin R.

    The growing concerns about climate change have led policy makers to consider various regulatory schemes designed to reduce the stock and growth of atmospheric CO2 concentrations while at the same time improving energy security. The most prominent proposals are the so called "cap-and-trade" frameworks which set aggregate emission levels for a jurisdiction and then issue or sell a corresponding number of allowances to emitters. Typically, these policy measures will also encourage the deployment of carbon capture and storage (CCS) in geological formations and mature oil fields through subsidies or other incentives. The ability to store CO 2 in mature oil fields through the deployment of CO2 enhanced oil recovery (CO2--EOR) is particularly attractive as it can simultaneously improve oil recovery at those fields, and serve as a possible financial bridge to the development of CO2 transportation infrastructure. The purpose of this research is to explore the impact that a tandem subsidy-tax policy regime may have on bargaining between emitters and sequestration providers, and also to identify oil units in Wyoming that can profitably undertake CO 2--EOR as a starting point for the build-out of CO2 pipelines. In the first essay an economics lab experiment is designed to simulate private bargaining between carbon emitters (such as power plants) and carbon sequestration sites when the emitter faces carbon taxes, sequestration subsidies or both. In a tax-subsidy policy regime the carbon tax (or purchased allowances) can be avoided by sequestering the carbon, and in some cases the emitter can also earn a subsidy to help pay for the sequestration. The main policy implications of the experiment results are that the sequestration market might be inefficient, and sequestration providers seem to have bargaining power sufficient to command high prices. This may lead to the integration of CO2 sources and sequestration sites, and reduced prices for the injectable CO2 purchased by oil

  17. From academic research articles to academic visual and video essays: Only a multimodal transition?

    DEFF Research Database (Denmark)

    Maier, Carmen Daniela

    Drawing on an interdisciplinary theoretical framework, we propose to examine multimodal texts from the academic genre set belonging to the field of presenting and discussing research results: the academic research article, the academic visual essay and the academic video essay. The data for this ......Drawing on an interdisciplinary theoretical framework, we propose to examine multimodal texts from the academic genre set belonging to the field of presenting and discussing research results: the academic research article, the academic visual essay and the academic video essay. The data...

  18. The new feminist criticism: essays on women, literature and theory The new feminist criticism: essays on women, literature and theory

    Directory of Open Access Journals (Sweden)

    Carmen Rosa Caldas

    2008-04-01

    Full Text Available This book is a collection of eighteen major essays on feminist criticism, which is basically concerned with the literary representations of sexual difference and establishes gender as a fundamental category of literary analysis. According to Showalter, the assumptions of literary study have been totally modified in the last decade due to the impact of the feminist critical revolution. This important approach to literature has "opened a space for the authority of the woman critic that extends beyond the study of women's writing to the reappraisal of the whole body of texts" (p.3. This book is a collection of eighteen major essays on feminist criticism, which is basically concerned with the literary representations of sexual difference and establishes gender as a fundamental category of literary analysis. According to Showalter, the assumptions of literary study have been totally modified in the last decade due to the impact of the feminist critical revolution. This important approach to literature has "opened a space for the authority of the woman critic that extends beyond the study of women's writing to the reappraisal of the whole body of texts" (p.3.

  19. Consistency of ocular coherence tomography fast macular thickness mapping in diabetic diffuse macular edema Consistência da tomografia de coerência óptica no edema macular difuso diabético

    Directory of Open Access Journals (Sweden)

    Fábio Petersen Saraiva

    2007-01-01

    Full Text Available OBJECTIVES: To investigate optical coherence tomography consistency on foveal thickness, foveal volume, and macular volume measurements in patients with and without diffuse diabetic macular edema. INTRODUCTION: Optical coherence tomography represents an objective technique that provides cross-sectional tomographs of retinal structure in vivo. However, it is expected that poor fixation ability, as seen in diabetic macular edema, could alter its results. Several authors have discussed the reproducibility of optical coherence tomography, but only a few have addressed the topic with respect to diabetic maculopathy. METHODS: The study recruited diabetic patients without clinically evident retinopathy (control group and with diffuse macular edema (case group. Only one eye of each patient was evaluated. Five consecutive fast macular scans were taken using Ocular Coherence Tomography 3; the 6 mm macular map was chosen. The consistency in measurements of foveal thickness, foveal volume, and total macular volume for both groups was evaluated using the Pearson's coefficient of variation. The T-test for independent samples was used in order to compare measurements of both groups. RESULTS: Each group consisted of 20 patients. All measurements had a coefficient of variation less than 10%. The most consistent parameter for both groups was the total macular volume. DISCUSSION: Consistency in measurement is a mainstay of any test. A test is unreliable if its measurements can not be correctly repeated. We found a good index of consistency, even considering patients with an unstable gaze. CONCLUSIONS: Optical coherence tomography is a consistent method for diabetic subjects with diffuse macular edema.OBJETIVOS: Investigar a consistência das medidas de espessura foveal, volume foveal e volume macular total feitas pela tomografia de coerência óptica em pacientes com e sem edema macular difuso diabético. INTRODUÇÃO: A tomografia de coerência óptica é uma t

  20. Multiphasic helical CT of hepatocellular carcinoma. Evaluation after chemoembolization; Tomografia Computerizzata spirale multifasica dell'epatocarcinoma. Valutazione dopo chemioembolizzazione

    Energy Technology Data Exchange (ETDEWEB)

    Catalano, O.; Esposito, M.; Sandomenico, F.; Siani, A. [Ospedale S. Maria delle Grazie, Pozzuoli, NA (Italy). Servizio di Radiologia; Nunziata, A. [Ospedale S. Maria delle Grazie, Naples (Italy). Area di Diagnostica per Immagini

    2000-06-01

    technique has several limitations, as also shown in recent literature papers and its clinical applications should be reduced. Multiphase helical studies may provide useful information and should be performed routinely in patients treated with chemo embolization. The present availability of alternative tools such as contrast-enhanced Doppler US and MRI should also be stressed and their potential role investigated. [Italian] Il presente lavoro si propone di illustrare la personale esperienza sull'integrazione della Tomografia Computerizzata (TC) senza mdc ev (Lipiodol-TC) con la TC spirale con mdc ev multifasica nella valutazione dei pazienti con epatocarcinoma trattati con chemioembolizzazione e analizzare il possibile ruolo attuale della TC con mdc oleoso. Si sono valutati retrospettivamente gli esami di 42 pazienti consecutivi sottoposti a chemioembolizzazione globale nell'arco di 2 anni. Lo studio con TC e' stato praticato 1830 giorni dopo il trattamento. La Lipiodol-TC e' stata eseguita con acquisione volumetrica; si sono considerati noduli quelle aree delimitate con ritenzione densa del mdc oleoso e si sono distinti la captazione in: 0=assente, I=inferiore a 10% dell'area del tumore, II=minore di 50%, III=maggiore di 50%, IV=omogenea. Lo studio con TC spirale con mdc ev e' stato praticato con tecnica bifasica in 28 pazienti e trifasica in 14; abbiamo ritenuto come nodulari quelle aree ben delimitate e relativamente omogenee con iperdensita' nella fase arteriosa e ipo-isodensita' in quella portale e/o tardiva oppure con ipo-isodensita' nella fase arteriosa e in quella portale e/o tardiva. Con la Lipiodol-TC sono stati identificati 65 noduli (1-5/paziente, media 1,5), 15 con grado I, 21 con grado II, 20 con grado III e 9 con grado IV. Con la TC multifasica sono stati dimostrati 6 noduli supplementari in 5 pazienti, di cui 5 iper-e uno ipovascolare, ed e' stata documentata meglio la reale morfovolumetria dei noduli con

  1. Tumores malignos da cavidade nasal: tomografia computadorizada e ressonância magnética Malignant tumors of the nasal cavity: computed tomography and magnetic resonance imaging

    Directory of Open Access Journals (Sweden)

    Ricardo Pires de Souza

    2004-10-01

    Full Text Available OBJETIVO: Este estudo propõe-se a avaliar o papel da tomografia computadorizada e da ressonância magnética na caracterização da extensão profunda dos tumores malignos da cavidade nasal. MATERIAIS E MÉTODOS: Entre 1990 e 2000 foram avaliados, retrospectivamente, 12 pacientes com diagnóstico de tumores malignos da cavidade nasal atendidos nos Departamentos de Diagnóstico por Imagem e Cirurgia de Cabeça e Pescoço do Complexo Hospitalar Heliópolis, São Paulo, SP. Todos os casos foram confirmados com exame anatomopatológico. RESULTADOS: Foi identificada extensão para os seios maxilares e etmoidal em seis pacientes, para a cavidade nasal contralateral, órbita e lâmina crivosa em cinco pacientes, para a nasofaringe e espaço mastigatório em dois pacientes, e para o seio cavernoso, fossas cranianas anterior e média, fossa pterigomaxilar, fissuras orbitárias superior e inferior, seio frontal, seio etmoidal contralateral, lâmina crivosa contralateral, palato duro e fossa pterigopalatina em um paciente. CONCLUSÃO: A análise precisa da extensão local e disseminação tumoral dada pela tomografia computadorizada e ressonância magnética desempenha papel importante no planejamento terapêutico, influenciando também o prognóstico.OBJECTIVE: The aim of this study is to evaluate the role of computed tomography and magnetic resonance imaging in the characterization of deep tissue extension of malignant tumors of the nasal cavity. MATERIALS AND METHODS: Twelve patients diagnosed with malignant tumors of the nasal cavity were retrospectively evaluated at the Departments of Diagnostic Imaging and Head and Neck Surgery of the "Complexo Hospitalar Heliópolis", São Paulo, Brazil, between 1990 and 2000. All cases were confirmed by histopathologic examination. RESULTS: Extension to the maxillary and ethmoid sinuses was identified in six patients, extension to contralateral nasal cavity, orbit and lamina cribosa in five patients, extension to

  2. Paracoccidioidomicose pulmonar: aspectos na tomografia computadorizada de alta resolução High-resolution computed tomography findings in pulmonary paracoccidioidomycosis

    Directory of Open Access Journals (Sweden)

    Maria Angélica Soares Muniz

    2002-06-01

    Full Text Available O comprometimento pulmonar na paracoccidioidomicose é muito freqüente, podendo até ser a única manifestação da doença. Neste trabalho são analisados os aspectos encontrados nas tomografias computadorizadas de alta resolução do tórax de 30 pacientes com paracoccidioidomicose confirmada. Por meio desta análise foram determinados os achados mais comuns e suas formas de apresentação e distribuição nos pulmões. Os aspectos mais freqüentemente observados foram: espessamento esparso de septos interlobulares (96,7%, opacidades em vidro fosco (66,7%, nódulos (60%, aumento irregular do espaço aéreo (enfisema paracicatricial (56,7%, espessamento de paredes brônquicas (46,7%, espessamento pleural (36,7%, cavidades (36,7%, dilatação da traquéia (33,3%, distorção arquitetural (30%, consolidação do espaço aéreo (30%, bandas parenquimatosas (23,3%, reticulado intralobular (13,3% e espessamento irregular do interstício axial peri-hilar (10%. A radiografia do tórax apresenta limitada capacidade de avaliar doenças pulmonares difusas, tornando a tomografia computadorizada de alta resolução do tórax essencial para avaliação dos pacientes com paracoccidioidomicose pulmonar.Pulmonary disease in paracoccidioidomycosis is very common and in some cases can be the sole manifestation of the disease. We studied the findings observed in 30 patients with pulmonary paracoccidioidomycosis submitted to high-resolution computed tomography in order to determine the most frequent findings, presentation patterns and distribution of paracoccidioidomycosis lesions in the lungs. The most frequent findings observed on high-resolution computed tomography were: interlobular septal thickening (96.7%, ground-glass opacities (66.7%, nodules (60%, irregular air-space enlargement (56.7%, bronchial wall thickening (46.7%, pleural thickening (36.7%, cavitation (36.7%, tracheal dilatation (33.3%, architectural distortion (30%, air-space consolidation (30

  3. O valor da tomografia computadorizada na mudança do paradigma cirúrgico do carcinoma epidermóide de boca e orofaringe

    Directory of Open Access Journals (Sweden)

    Joel Pinheiro de Brito Junior

    Full Text Available OBJETIVO: Determinar a importância da tomografia computadorizada na mudança do paradigma cirúrgico no carcinoma espinocelular (CEC da boca e orofaringe. MÉTODO: De 1991 e 2004, nos Departamentos de Cirurgia de Cabeça e Pescoço/ORL e Radiologia do Hospital Heliópolis, foram analisados, retrospectivamente, tomografias computadorizadas de 30 pacientes, 25 homens e cinco mulheres, com idades variando de 25 a 77 anos, todos com diagnóstico de carcinoma epidermóide do soalho da boca e/ou da língua oral e orofaringe. Todos os exames foram avaliados por dois radiologistas, separadamente, sem o conhecimento prévio do estadiamento clínico, sendo analisada a disseminação local-regional para os diferentes sítios. Para análise interobservadores, o índice Kappa foi calculado para estimar a concordância entre os mesmos, sendo o nível de significância adotado o valor de 0,05. RESULTADO: A análise da concordância entre os observadores foi considerada excelente (Kappa: 0,81 - 1,00 para três subsítios (linha média, espaço mastigador e cadeia linfonodal jugulo-carotídea alta; boa (Kappa: 0,61 - 0,80 para 10 subsítios (soalho da boca e língua oral, ramo da mandíbula, trígono retromolar, espaço submandibular, loja amigdalina e cadeias linfonodais submentoniana, submandibular, jugulo-carotídea média, jugulo-carotídea baixa e espinal; moderada (Kappa: 0,41 - 0,60 para dois subsítios (corpo da mandíbula e base da língua e não foi possível calcular o Kappa para um subsítio (cadeia linfonodal retrofaríngea. CONCLUSÃO: A concordância interobservadores predominou de boa a excelente, sendo os valores estatisticamente significantes.

  4. Edema pulmonar hidrostático: aspectos na tomografia computadorizada de alta resolução Hydrostatic pulmonary edema: high-resolution computed tomography aspects

    Directory of Open Access Journals (Sweden)

    Cláudia Maria Cunha Ribeiro

    2006-12-01

    Full Text Available OBJETIVO: A proposta deste estudo foi caracterizar por meio de tomografia computadorizada de alta resolução do tórax as principais alterações pulmonares do edema pulmonar hidrostático. MÉTODOS: Foram analisadas, retrospectivamente, as tomografias de quinze pacientes com quadro clínico de edema pulmonar hidrostático, divididos em cinco principais grupos etiológicos: insuficiência cardíaca congestiva, valvulopatia mitral aguda, infarto agudo do miocárdio, miocardite e mediastinite fibrosante, tendo sido sete pacientes classificados no primeiro grupo e dois em cada um dos demais. RESULTADOS: Os principais achados do edema hidrostático foram opacidades em vidro fosco (100%, espessamento dos septos interlobulares (100%, derrame pleural (87% e espessamento do interstício peribroncovascular (80%. Outros achados menos comuns foram aumento do calibre dos vasos, consolidações e nódulos do espaço aéreo. CONCLUSÃO: O padrão predominante encontrado nos pacientes estudados foi o de opacidades em vidro fosco associadas a espessamento dos septos interlobulares (padrão de pavimentação em mosaico, com derrame pleural bilateral, predominante à direita.OBJECTIVE: This study aimed to use high-resolution computed tomography scans of the chest to characterize the principal alterations occurring in cases of hydrostatic pulmonary edema. METHODS: A retrospective analysis was made of the tomography scans of 15 patients presenting clinical profiles of hydrostatic pulmonary edema. The cases were divided into five groups by etiology: congestive heart failure (n = 7; acute mitral valve disease (n = 2; acute myocardial infarction (n = 2; myocarditis (n = 2; and fibrosing mediastinitis (n = 2. RESULTS: The principal findings in the cases of hydrostatic pulmonary edema were ground-glass opacities (in 100%, interlobular septal thickening (in 100%, pleural effusion (in 87% and peribronchovascular interstitial thickening (in 80%. Other, less common

  5. Avaliação da artéria etmoidal anterior pela tomografia computadorizada no plano coronal Anterior ethmoidal artery evaluation on coronal CT scans

    Directory of Open Access Journals (Sweden)

    Soraia Ale Souza

    2009-02-01

    Full Text Available O conhecimento da localização da artéria etmoidal anterior (AEA constitui etapa importante na cirurgia do recesso do seio frontal e do etmóide anterior. A tomografia computadorizada (TC, em especial no plano coronal pode fornecer reparos anatômicos que identificam o trajeto da AEA. OBJETIVO: Identificar os reparos anatômicos que caracterizam o trajeto da AEA na parede medial da órbita e na parede lateral da fossa olfatória. Verificar a correlação entre a presença de pneumatização supra-orbitária e a visualização do etmoidal anterior (canal da AEA. CASUÍSTICA E MÉTODOS: Estudo retrospectivo de 198 tomografias computadorizadas dos seios paranasais no plano coronal do período de agosto a dezembro de 2006. RESULTADOS: Pneumatização supra-orbitária foi identificada em 35% (70 exames. O canal da AEA foi caracterizado em 41% (81 exames. O sulco etmoidal anterior foi visualizado em 98% (194 dos exames e o forame etmoidal anterior foi identificado em todos os exames (100%. CONCLUSÃO: O forame etmoidal anterior e o sulco etmoidal anterior foram referências anatômicas presentes em quase 100% dos exames avaliados. Houve correlação entre a presença de pneumatização supra-orbitária e a caracterização do canal da AEA.The anterior ethmoidal artery (AEA is an important point for frontal and ethmoid sinuses surgery. CT scans can identify landmarks to help the surgeon find the AEA. AIM: To identify the landmarks of the AEA on the orbital medial wall and on the lateral wall of the olfactory fossa. and to correlate the presence of supraorbital ethmoidal cells with spotting the anterior ethmoidal artery canal. MATERIALS AND METHODS: Retrospective review of 198 direct coronal paranasal sinuses computed tomography (CT scans from August to December, 2006. RESULTS: Supraorbital pneumatization was seen in 35% (70 scans. The AEA canal was seen in 41% (81 scans. The anterior ethmoidal sulcus was seen in 98% (194 scans and the anterior

  6. Hierarchical decision modeling essays in honor of Dundar F. Kocaoglu

    CERN Document Server

    2016-01-01

    This volume, developed in honor of Dr. Dundar F. Kocaoglu, aims to demonstrate the applications of the Hierarchical Decision Model (HDM) in different sectors and its capacity in decision analysis. It is comprised of essays from noted scholars, academics and researchers of engineering and technology management around the world. This book is organized into four parts: Technology Assessment, Strategic Planning, National Technology Planning and Decision Making Tools. Dr. Dundar F. Kocaoglu is one of the pioneers of multiple decision models using hierarchies, and creator of the HDM in decision analysis. HDM is a mission-oriented method for evaluation and/or selection among alternatives. A wide range of alternatives can be considered, including but not limited to, different technologies, projects, markets, jobs, products, cities to live in, houses to buy, apartments to rent, and schools to attend. Dr. Kocaoglu’s approach has been adopted for decision problems in many industrial sectors, including electronics rese...

  7. Syntactic Properties Of The English Verbs In The Students' Essays

    Directory of Open Access Journals (Sweden)

    H. Muhammad Basri D.

    2016-02-01

    Full Text Available This cross-sectional study aimed to explain the epithet of verb performance within the syntactic properties gained by the students in their essays, i.e. (1 tense, (2 aspect, (3 voice, and (4 mood. The data had been gathered from the 50 samples for each graded level by using a proportional random sampling technique. The processes of soft data attempted to search the epithet of verb performance through the equilibriums between accuracy and inaccuracy. As a result, the research findings indicated that epithet of the students' verb performance was 12.06%, including tense (27.83 %, aspect (21.51%, voice (-35.72%, and mood (34.63%.

  8. Discrete thoughts essays on mathematics, science, and philosophy

    CERN Document Server

    Kac, Mark; Schwartz, Jacob T

    1992-01-01

    This is a volume of essays and reviews that delightfully explore mathematics in all its moods — from the light and the witty, and humorous to serious, rational, and cerebral. Topics include: logic, combinatorics, statistics, economics, artificial intelligence, computer science, and applications of mathematics broadly. You will also find history and philosophy covered, including discussion of the work of Ulam, Kant, Heidegger among others. "...these papers reflect on mathematics and its influence on human society. They can help the specialist to notice what is going on around him, and they may lead educated people from other domains to a better understanding of mathematics. Many of these papers can advise educators how to form a modern mathematics education, which develops approved ideas and institutions...I admire the stimulating perspectives of the authors."---American Mathematical Society "‘Mathematicians, like Proust and everyone else, are at their best when writing about their first love’ … They a...

  9. On Emotions, Knowledge and Educational Institutions: An Explorative Essay

    Directory of Open Access Journals (Sweden)

    Thomas Karlsohn

    2016-06-01

    Full Text Available In this essay I formulate some reflections around the theme feelings and education.1 I will outline some essential features of the research and will argue that a historical approach to the subject will contribute by adding nuance to and complementing the often one-sided and misleading discussions that have marked the debate both within and outside of academia. In a subsequent part of the text I will concretise my reasoning by discussing one specific phenomenon from the past. I have chosen the example of love and will discuss the function it serves in higher education. The focus of the discussion will alternate between the Swedish context and international perspectives.

  10. Globalization, Development and Ordinary Cities: A Review Essay

    Directory of Open Access Journals (Sweden)

    James C. Fraser

    2015-08-01

    Full Text Available What are the underlying spatial assumptions about the world that renders some cities exemplars of modernity and innovation, while others are cast as being behind, and worse yet, forgotten places? This is a key question that has emerged in geography and sociology, and is addressed in Jennifer Robinson’s book Ordinary Cities: Between Modernity and Development. The purpose of this essay is two-fold in that it provides a review of Robinson’s book and it also uses her text as a vehicle to interrogate the geo-politics of urban theory development. In particular, scholars have voiced concern over the manner in which “world cities” and then “global cities” have the power/knowledge e?ect of reifying the idea that there is one “world system” that can be measured objectively.

  11. Short Essay on Managing Multicultural Students Groups within Diversity Context

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    Cătălin Ploae

    2016-01-01

    Full Text Available The present essay focuses on summarizing the key elements that should be considered wheneducators are in a position to manage and interact with a group of students from different culturesor social environments. In this respect, we consider that the challenge educators’ face inconnecting with students of diverse backgrounds is to develop a critical consciousness of the waysin which these larger discourses operate in their classrooms and to care enough to question them,to challenge them and to advocate for their students. To care for students who come fromhistorically marginalized populations educators need to remember that schooling can serve eithera liberating or marginalizing function. They can empower students to identify structures in societythat have contributed to marginalizing their perspective and seek to maintain inequitable structuresin society or even narrow communities.

  12. Essays on variational approximation techniques for stochastic optimization problems

    Science.gov (United States)

    Deride Silva, Julio A.

    This dissertation presents five essays on approximation and modeling techniques, based on variational analysis, applied to stochastic optimization problems. It is divided into two parts, where the first is devoted to equilibrium problems and maxinf optimization, and the second corresponds to two essays in statistics and uncertainty modeling. Stochastic optimization lies at the core of this research as we were interested in relevant equilibrium applications that contain an uncertain component, and the design of a solution strategy. In addition, every stochastic optimization problem relies heavily on the underlying probability distribution that models the uncertainty. We studied these distributions, in particular, their design process and theoretical properties such as their convergence. Finally, the last aspect of stochastic optimization that we covered is the scenario creation problem, in which we described a procedure based on a probabilistic model to create scenarios for the applied problem of power estimation of renewable energies. In the first part, Equilibrium problems and maxinf optimization, we considered three Walrasian equilibrium problems: from economics, we studied a stochastic general equilibrium problem in a pure exchange economy, described in Chapter 3, and a stochastic general equilibrium with financial contracts, in Chapter 4; finally from engineering, we studied an infrastructure planning problem in Chapter 5. We stated these problems as belonging to the maxinf optimization class and, in each instance, we provided an approximation scheme based on the notion of lopsided convergence and non-concave duality. This strategy is the foundation of the augmented Walrasian algorithm, whose convergence is guaranteed by lopsided convergence, that was implemented computationally, obtaining numerical results for relevant examples. The second part, Essays about statistics and uncertainty modeling, contains two essays covering a convergence problem for a sequence

  13. Two essays on real-time pricing of electric power

    Science.gov (United States)

    Gupta, Nainish Kumar

    1997-09-01

    This dissertation contains two essays on a new innovative pricing mechanism in the electric power industry known as Real Time Pricing (RTP). RTP is a method of pricing electric power wherein at least one component of the price is set at or near levels that reflect the marginal costs of providing power during each time-specific interval. These prices vary in accord with time-specific, incremental supplier costs. RTP allows customers to manage their own bills by adjusting their consumption as spot prices and supplier costs vary, which may amount during a single day from 2 cents to 85 cents for one kilowatt hour (kWh) of usage. Using 1995 data the hypothesis that industrial customers shift their usage patterns of electricity in response to real time prices is tested. To measure customer responsiveness to real time electric rates, econometric techniques are applied to estimate demand elasticities.

  14. Essay writing in biology: An example of effective student learning?

    Science.gov (United States)

    Zeegers, Petrus; Giles, Lynne

    1996-12-01

    The views of first-year biology students ( N=337) on an essay writing assignment were evaluated by means of a questionnaire. The students were asked to reflect on the strategies they employed, the number and type of resources used, their areas of difficulty and to evaluate their own performance. The data were used to elucidate possible areas of discrepancy between the approach taken by the students and that suggested by the Biology Department via information in student manuals and evaluation criteria. The data were also compared to similar studies on student writing previously reported for students of psychology and history. Finally a series of recommendations is made to help staff to allow their students to develop improved writing strategies, minimise the possible difficulties encountered and allow the writing exercise to fulfil its desired outcome, that of being an integral part of the process of learning.

  15. Common findings and pseudolesions at computed tomography colonography: pictorial essay

    International Nuclear Information System (INIS)

    Atzingen, Augusto Castelli von; Tiferes, Dario Ariel; Matsumoto, Carlos Alberto; Nunes, Thiago Franchi; Maia, Marcos Vinicius Alvim Soares; D'Ippolito, Giuseppe

    2012-01-01

    Computed tomography colonography is a minimally invasive method for screening for polyps and colorectal cancer, with extremely unusual complications, increasingly used in the clinical practice. In the last decade, developments in bowel preparation, imaging, and in the training of investigators have determined a significant increase in the method sensitivity. Images interpretation is accomplished through a combined analysis of two-dimensional source images and several types of three-dimensional renderings, with sensitivity around 96% in the detection of lesions with dimensions equal or greater than 10 mm in size, when analyzed by experienced radiologists. The present pictorial essay includes examples of diseases and pseudolesions most frequently observed in this type of imaging study. The authors present examples of flat and polypoid lesions, benign and malignant lesions, diverticular disease of the colon, among other conditions, as well as pseudolesions, including those related to inappropriate bowel preparation and misinterpretation. (author)

  16. Review Essay: Grenzgänger Seeks Reflexive Methodology

    Directory of Open Access Journals (Sweden)

    Wolff-Michael Roth

    2002-09-01

    Full Text Available Reflexive Methodology reviews major strands of current thought in epistemology, philosophy, social science, and interpretive methods. The book falls short in that it neither does a thorough job reviewing the literature nor does it provide method-related advice useful to students. Grenzgängerin constitutes a collection of essays on a broad range of topics, but which are only loosely connected if at all. Drawing on DERRIDA and the notion of a historical science of the historical subject, I attempt to practice method, something I missed in both texts. I make explicit the historical nature of my own writing and the historical nature of my subject. I make explicit intertextuality and in the process practice reflexivity in the particular way I am writing. URN: urn:nbn:de:0114-fqs020328

  17. Common findings and pseudolesions at computed tomography colonography: pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Atzingen, Augusto Castelli von [Clinical Radiology, Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP (Brazil); Tiferes, Dario Ariel; Matsumoto, Carlos Alberto; Nunes, Thiago Franchi; Maia, Marcos Vinicius Alvim Soares [Abdominal Imaging Section, Department of Imaging Diagnosis - Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP (Brazil); D' Ippolito, Giuseppe, E-mail: giuseppe_dr@uol.com.br [Department of Imaging Diagnosis, Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP (Brazil)

    2012-05-15

    Computed tomography colonography is a minimally invasive method for screening for polyps and colorectal cancer, with extremely unusual complications, increasingly used in the clinical practice. In the last decade, developments in bowel preparation, imaging, and in the training of investigators have determined a significant increase in the method sensitivity. Images interpretation is accomplished through a combined analysis of two-dimensional source images and several types of three-dimensional renderings, with sensitivity around 96% in the detection of lesions with dimensions equal or greater than 10 mm in size, when analyzed by experienced radiologists. The present pictorial essay includes examples of diseases and pseudolesions most frequently observed in this type of imaging study. The authors present examples of flat and polypoid lesions, benign and malignant lesions, diverticular disease of the colon, among other conditions, as well as pseudolesions, including those related to inappropriate bowel preparation and misinterpretation. (author)

  18. Intracranial involvement in plasmacytomas and multiple myeloma: a pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Cerase, Alfonso; Gennari, Paola; Monti, Lucia; Venturi, Carlo [Azienda Ospedaliera Universitaria Senese, Unit of Diagnostic and Therapeutic Neuroradiology, and InterDepartmental Center of Nuclear Magnetic Resonance, Policlinico ' Santa Maria alle Scotte' , Siena (Italy); Tarantino, Annachiara; Muccio, Carmine Franco [Azienda Ospedaliera ' G. Rummo' , Unit of Neuroradiology, Department of Neurosciences, Benevento (Italy); Gozzetti, Alessandro [University of Siena, Unit of Hematology and Transplants, Policlinico ' Santa Maria alle Scotte' , Siena (Italy); Di Blasi, Arturo [Azienda Ospedaliera ' G. Rummo' , Unit of Pathology, Department of Oncology, Benevento (Italy)

    2008-08-15

    The purpose of this pictorial essay is to increase awareness of the clinical presentation, neuroradiological findings, treatment options, and neuroradiological follow-up of plasmacytomas and multiple myeloma with intracranial growth. This pictorial essay reviews the clinical features and neuroradiological findings in seven patients (four women, three men; age range at diagnosis 62-82 years) followed in two institutions. Six patients, one with IgG-{kappa} plasmacytoma, and five with IgG-{kappa}(n=3), IgG-{lambda}(n=1), and nonsecretory (n=1) multiple myeloma, had been seen over a period of 9 years in one institution, and the other patient with IgG-{kappa} plasmacytoma had been seen over a period of 3.5 years in the other. Intracranial involvement is rare, most frequently resulting from osseous lesions in the cranial vault, skull base, nose, or paranasal sinuses. Primary dural or leptomeningeal involvement is rarer. Some typical findings of a dural and/or osseous plasmacytoma include iso- to hyperdensity on CT scan, T1 equal to high signal intensity and T2 markedly hypointense signal on MRI, and high vascularity possibly documented on intraarterial digital subtraction angiography. However, the neuroradiological findings generally lack specificity, since they are generally no different from those of meningioma, metastasis, lymphoma, dural sarcoma, plasma cell granuloma, infectious meningitis, and leptomeningeal carcinomatosis. The spectrum of clinical and neuroradiological evaluation shows that intracranial involvement from plasmacytoma and multiple myeloma must be taken into account in the differential diagnosis of cranial osseous and meningeal disease. (orig.)

  19. [Pierre Bayen rediscovers the Essays of Jean Rey].

    Science.gov (United States)

    Lafont, Olivier

    2014-10-01

    Jean Rey, a physician from The Bugue, a little town near Bergerac, published, in 1630, a book entitled "Essays" in which he explained the increase of the mass of lead, when it was strongly heated, by the fixation of a part of the air. This revolutionary publication was not received by the European scientists, because the Father Mersenne, "the secretary of learned Europe", was not able to repeat his experiments. Between 1774 and 1775, Pierre Bayen, who was a military apothecary, published his Works concerning the "precipitate per se", for us HgO, showing that when this compound was destroyed by heating, it produced a gas, and that the mass of this gas and the mass of the mercury obtained were equal to the mass of the "precipitate per se". He concluded that the phlogiston theory was contradictory with the results of the experiments. When, later on, Lavoisier published his important article on the increase of the mass of steal when it was heated in the air, he "forgot" to cite the Works of Bayen. In January 1775, Pierre Bayen published a letter in which he mentioned that he had discovered an exemplar of Jean Rey's book and explained that this physician of the 17th century had supposed the explanation that had been proved by Lavoisier. Nicolas Gobet then published a new edition of the "Essays" in 1777, but this new edition became itself quite rare. An inscription pencilled on the book kept by the British Museum pretends that all the exemplars Lavoisier could find were destroyed. It is not rigorous to conclude on a single document, especially when it is not signed, but it is sufficient to induce doubt.

  20. A Flipped Writing Classroom: Effects on EFL Learners’ Argumentative Essays

    Directory of Open Access Journals (Sweden)

    Fatemeh Soltanpour

    2018-02-01

    Full Text Available According to the literature, flipped teaching is a relatively new pedagogical approach in which the typical activities of classroom lectures followed by homework in common teaching practice are reversed in order, and most often integrated or supplemented with some types of instructional materials, such as instructional videos or PowerPoint files. This experimental study, using a pre-test-treatment-posttest-delayed posttest design, was aimed at investigating the effect of flipped instruction on Iranian EFL learners’ quality of argumentative essays. The participants were 55 students, who were assigned to two groups: the flipped classroom (FC and the traditional classroom (TC. Each group received 3 sessions of treatment. First, whether there was any significant difference between the FC and TC in the overall quality of the essays was investigated. The FC group significantly outperformed the TC one. Then, whether the difference between the groups varied over time was explored, and it was revealed that the FC was still significantly superior over the TC. Next, whether there would be any significant change in the FC in the long run was examined, and no significant change was seen. The promising results found in FC group can be attributed to not only the flipped instruction but also the process of actively engaging the learners in their learning in addition to incorporating different techniques, such as the video screencasting, collaborative writing, as well as in-class teacher-learner interaction and negotiation because it is argued that the crucial point in flipped instruction is how teachers best use in-class-time with students.

  1. Effects of Technology on Critical Thinking and Essay Writing among Gifted Adolescents

    Science.gov (United States)

    Dixon, Felicia; Cassady, Jerrell; Cross, Tracy; Williams, David

    2005-01-01

    This article presents results of a study that compared critical thinking in two writing samples (essays) from gifted adolescents who attended a residential school. The essays were written at the beginning of the junior year (when students were admitted to the school) and at the beginning of the senior year. All students in the study composed their…

  2. Applications of Agent Based Approaches in Business (A Three Essay Dissertation)

    Science.gov (United States)

    Prawesh, Shankar

    2013-01-01

    The goal of this dissertation is to investigate the enabling role that agent based simulation plays in business and policy. The aforementioned issue has been addressed in this dissertation through three distinct, but related essays. The first essay is a literature review of different research applications of agent based simulation in various…

  3. Relations between scripted online peer feedback processes and quality of written argumentative essay

    NARCIS (Netherlands)

    Noroozi, Omid; Biemans, Harm; Mulder, Martin

    2016-01-01

    Teachers often complain about the quality of students' written essays in higher education. This study explores the relations between scripted online peer feedback processes and quality of written argumentative essay as they occur in an authentic learning situation with direct practical relevance.

  4. A Comparison of EFL Raters' Essay-Rating Processes across Two Types of Rating Scales

    Science.gov (United States)

    Li, Hang; He, Lianzhen

    2015-01-01

    This study used think-aloud protocols to compare essay-rating processes across holistic and analytic rating scales in the context of China's College English Test Band 6 (CET-6). A group of 9 experienced CET-6 raters scored the same batch of 10 CET-6 essays produced in an operational CET-6 administration twice, using both the CET-6 holistic…

  5. Bioremediation of polluted wasewaterwater influent: phiosphorus and nitrogen removal. Scientific Research and Essays

    DEFF Research Database (Denmark)

    Muchie, Mammo; Akpor, OB

    2010-01-01

    Akpor OB and Muchie M. (2010). Bioremediation of polluted wasewaterwater influent: phiosphorus and nitrogen removal. Scientific Research and Essays, Vol. 5(21), pp. 3222–3230......Akpor OB and Muchie M. (2010). Bioremediation of polluted wasewaterwater influent: phiosphorus and nitrogen removal. Scientific Research and Essays, Vol. 5(21), pp. 3222–3230...

  6. The Effects of Browse Time on the Internet on Students' Essay Scores

    Science.gov (United States)

    Doan, Kim; Bloomfield, Aaron

    2014-01-01

    This study examined how 30 minutes of search time on the Web affected students' essay scores in response to a writing prompt. Expository essays were obtained from 49 fourth- and fifth-grade students enrolled in an elementary school in Virginia, in the United States. Students were placed by random assignment into three groups with the same writing…

  7. The development and validation of a rating scale for ESL essay writing

    African Journals Online (AJOL)

    This article describes an empirical procedure for developing and validating a rating scale for assessing essays in English as a second language. The study was motivated by a concern for the validity of the scoring grid currently used to assess ESL essay writing at Grade 12 in the final end-of-year examination in South Africa ...

  8. On the state of the debate in ecological theology : review essay ...

    African Journals Online (AJOL)

    This review essay assesses the state of the debate on a Christian Ecological Theology with specific reference to the important volume of essays Christianity and ecology: seeking the well-being of earth and humans edited by Dieter Hessel and Rosemary Ruether (2000). It also reflects on the future agenda for an ecological ...

  9. Essays on optimal hedging and investment strategies and on derivative pricing

    NARCIS (Netherlands)

    van den Goorbergh, R.W.J.

    2004-01-01

    This dissertation encompasses four essays on various topics within the field of finance. Chapter 1 presents an overview of the contributions of each essay. Chapter 2, titled Risk Aversion, Price Uncertainty, and Irreversible Investments, extends the theory of irreversible investment under

  10. Topical Structure in Argumentative Essays of EFL Learners and Implications for Writing Classes

    Science.gov (United States)

    Kiliç, Mehmet; Genç, Bilal; Bada, Erdogan

    2016-01-01

    The literature on the topical organization of essays suggests that there are four possible types of progression from the topic of one clause to the topics of the following clauses. These are parallel, sequential, extended parallel, and extended sequential progressions. Essay writers' ability to create cohesion and coherence can be evaluated on the…

  11. Assessing Writing in MOOCs: Automated Essay Scoring and Calibrated Peer Review™

    Science.gov (United States)

    Balfour, Stephen P.

    2013-01-01

    Two of the largest Massive Open Online Course (MOOC) organizations have chosen different methods for the way they will score and provide feedback on essays students submit. EdX, MIT and Harvard's non-profit MOOC federation, recently announced that they will use a machine-based Automated Essay Scoring (AES) application to assess written work in…

  12. Corrections on Grammar, Sentence Variety and Developing Detail to Qualify Academic Essay of Indonesian Learners

    Science.gov (United States)

    Solikhah, Imroatus

    2017-01-01

    This experimental research examines: (1) significant differences of corrections on grammar, sentence variety and developing details on the quality of the essay by Indonesian learners; and (2) different effect of corrections on grammar, sentence variety, and developing details on the quality of the essay. Treatments for each were served as follows:…

  13. "EJ" Extra: The Five-Paragraph Essay and the Deficit Model of Education

    Science.gov (United States)

    Brannon, Lil; Courtney, Jennifer Pooler; Urbanski, Cynthia P.; Woodward, Shana V.; Reynolds, Jeanie Marklin; Iannone, Anthony E.; Haag, Karen D.; Mach, Karen; Manship, Lacy Arnold; Kendrick, Mary

    2008-01-01

    There is a seductive "commonsense" logic to two opinion pieces that have appeared over the last two years in the "Speaking My Mind" section of "English Journal": (1) Byung-In Seo's "Defending the Five-Paragraph Essay," which appeared in the November 2007 issue; and (2) Kerri Smith's "In Defense of the Five-Paragraph Essay," which appeared in March…

  14. Libraries and the Future: Essays on the Library in the Twenty-First Century.

    Science.gov (United States)

    Lancaster, Frederick Wilfrid, Ed.

    The essays collected in this volume present the personal visions of several individuals, mostly librarians and other information professionals, on what the library might look like 25 or 30 years from now. The contributors represent a wide variety of libraries and related institutions on four continents. The essays collected are:…

  15. Automated Assessment of Non-Native Learner Essays: Investigating the Role of Linguistic Features

    Science.gov (United States)

    Vajjala, Sowmya

    2018-01-01

    Automatic essay scoring (AES) refers to the process of scoring free text responses to given prompts, considering human grader scores as the gold standard. Writing such essays is an essential component of many language and aptitude exams. Hence, AES became an active and established area of research, and there are many proprietary systems used in…

  16. A Strategy for Detection of Inconsistency in Evaluation of Essay Type Answers

    Science.gov (United States)

    Shukla, Archana; Chaudhary, Banshi D.

    2014-01-01

    The quality of evaluation of essay type answer books involving multiple evaluators for courses with large number of enrollments is likely to be affected due to heterogeneity in experience, expertise and maturity of evaluators. In this paper, we present a strategy to detect anomalies in evaluation of essay type answers by multiple evaluators based…

  17. Lexical Cohesion in Students' Argumentative Essay among a Select Group of Filipino College Students

    Science.gov (United States)

    Alarcon, Josephine B.

    2013-01-01

    This study analyzed the lexical devices used by undergraduate students in their argumentative text using Halliday and Hasan (1976) and Halliday's (2004) taxonomy. One hundred forty-eight argumentative essays were analyzed. The essays underwent interrating by three independent raters using a 20-point rubric and were grouped according to rating.…

  18. Essays on the Impact of Social Media: Evidence from the Music Industry and the Stock Market

    Science.gov (United States)

    Chen, Hailiang

    2012-01-01

    As both individuals and businesses are starting to embrace social media, understanding the power and influence of social media becomes an important question. This dissertation aims to address this issue and study the impact of social media in different contexts. It consists of two essays. The first essay examines the effectiveness of social media…

  19. The Determination of Children's Knowledge of Global Lunar Patterns from Online Essays Using Text Mining Analysis

    Science.gov (United States)

    Cheon, Jongpil; Lee, Sangno; Smith, Walter; Song, Jaeki; Kim, Yongjin

    2013-01-01

    The purpose of this study was to use text mining analysis of early adolescents' online essays to determine their knowledge of global lunar patterns. Australian and American students in grades five to seven wrote about global lunar patterns they had discovered by sharing observations with each other via the Internet. These essays were analyzed for…

  20. Three Essays on Educator Labor Markets: Evidence from Missouri Public Schools

    Science.gov (United States)

    Shi, Shishan

    2013-01-01

    This dissertation consists of three essays. The first essay investigates the feasibility of moving high-performing teachers to low-performing schools using administrative micro data from Missouri. I define teacher labor markets concentrically and construct models to allow teachers' local labor markets, within teaching, to influence their mobility…

  1. Essays on Crowdfunding: Exploring the Funding and Post-Funding Phases and Outcomes

    Science.gov (United States)

    Fan-Osuala, Onochie

    2017-01-01

    In the recent years, crowdfunding (a phenomenon where individuals collectively contribute money to back different goals and projects through the internet) has been gaining a lot of attention especially for its socio-economic impact. This dissertation explores this phenomenon in three distinct but related essays. The first essay explores the nature…

  2. THE EFECTIVENESS OF RHETORIC-BASED ESSAY WRITING TEACHING MODEL WITH CONTEXTUAL APPROACH

    Directory of Open Access Journals (Sweden)

    - Akbar

    2015-06-01

    Full Text Available This study aims to develop a rhetoric–based essay writing teaching model with contextual approach in order to improve essay writing skills of students in the English Department of the Education and Teaching Faculty of Lakidende University of Konawe. This instructional model was developed by using research and development. The results show that the model can improve students’ essay writing skills effectively.. It was done in experimental class of the Education and Teaching Faculty of Lakidende University of Konawe Southeast Sulawesi province of Indonesia with the score of 69,80. Thus, it can be concluded that the rhetoric–based essay writing teaching model with contextual approach that has been developed can improve the essay writing skills of students of English Department. It was proper.

  3. THE STRATEGY OF USING PERSUASIVE ESSAY IN ENGLISH FOR MEDICAL ACADEMIC WRITING

    Directory of Open Access Journals (Sweden)

    Ellie Setyo Wahyuni

    2014-06-01

    Full Text Available Writing persuasive essay has the purpose of providing some techniques in organizing the idea and constructing the sentences in coherence. The content of this essay contains the health issue and medical terms. The students of medical faculty are expected to make a good persuasive essay in order to find out the recommendation solution of a health problem through the strategies (1 brainstorming (2 mapping (3 the 5 W’s (4 setting thesis statement (5 providing fact, statistic, and example (5 conclusion. The techniques have improved the student writing as the essays have been evaluated and given positive input on the content and development of paragraphs. This academic writing aims to give some practices for the Medical Faculty students of Hang Tuah University in order to produce a good persuasive essay in term of coherence, sentence structure, and organization.

  4. Tomografia computadorizada do tórax de cadelas portadoras de neoplasias malignas: II - Avaliação dos campos pulmonares

    Directory of Open Access Journals (Sweden)

    Ana Carolina Brandão de Campos Fonseca Pinto

    2007-06-01

    Full Text Available Visto a importância das neoplasias mamárias na clínica médico-veterinária e as novas perspectivas do diagnóstico por imagem, o presente trabalho visou comparar o exame tomográfico contrastado com o exame radiográfico simples dos campos pulmonares de cadelas portadoras de tumores mamários malignos. Para tanto, foram realizados exames de tomografia computadorizada contrastada da cavidade torácica de vinte fêmeas da espécie canina, de diferentes raças e idades, portadoras de neoplasias mamárias malignas encaminhadas ao Serviço de Diagnóstico por Imagem do Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo pelos Serviços de Obstetrícia e Ginecologia e de Cirurgia de Pequenos Animais da mesma instituição. Concluiu-se que, o exame tomográfico se mostrou um importante complemento do exame radiográfico na pesquisa de metástases de neoplasias mamárias em cadelas no que se refere à avaliação do interstício pulmonar.

  5. Studio del danneggiamento mediante tomografia in luce del sincrotrone: impatto di un cono d’ombra sulla qualità finale delle ricostruzioni

    Directory of Open Access Journals (Sweden)

    Andrea Bernasconi

    2010-07-01

    Full Text Available Un’accurata osservazione della geometria tridimensionale di cricche e difetti è necessaria per lo studio dei meccanismi alla base del processo di danneggiamento. I metodi convenzionali utilizzati a questo scopo sono distruttivi o non possiedono una sufficiente risoluzione. Le tecniche di imaging che utilizzano la luce di sincrotrone, ed in particolare la microtomografia (micro-CT a raggi X, invece, uniscono i vantaggi di una tecnica non distruttiva ad un’elevata risoluzione spaziale e risultano quindi particolarmente interessanti. Un limite all’applicazione di questa tecnica è costituito dalla propensione della cricca a richiudersi una volta rimosso il carico che ha provocato il danneggiamento, superabile attraverso l’impiego di un dispositivo in grado di esercitare un carico di trazione durante l’acquisizione dei dati. Facendo riferimento al set-up sperimentale della linea SYRMEP di Elettra, il sincrotrone di Trieste, e tralasciando per il momento i vincoli legati a pesi e ingombri, è possibile pensare di inserire tra camera di ionizzazione e CCD una macchina per prove di trazione mono-colonna commerciale, in grado di mantenere aperto il difetto per tutta la durata della tomografia. In questo lavoro viene valutato l’impatto di questo vincolo sulla qualità finale delle ricostruzioni.

  6. Essays on the Determinants of Energy Related CO2 Emissions =

    Science.gov (United States)

    Moutinho, Victor Manuel Ferreira

    Overall, amongst the most mentioned factors for Greenhouse Gases (GHG) growth are the economic growth and the energy demand growth. To assess the determinants GHG emissions, this thesis proposed and developed a new analysis which links the emissions intensity to its main driving factors. In the first essay, we used the 'complete decomposition' technique to examine CO2 emissions intensity and its components, considering 36 economic sectors and the 1996-2009 periods in Portugal. The industry (in particular 5 industrial sectors) is contributing largely to the effects of variation of CO2 emissions intensity. We concluded, among others, the emissions intensity reacts more significantly to shocks in the weight of fossil fuels in total energy consumption compared to shocks in other variables. In the second essay, we conducted an analysis for 16 industrial sectors (Group A) and for the group of the 5 most polluting manufacturing sectors (Group B) based on the convergence examination for emissions intensity and its main drivers, as well as on an econometric analysis. We concluded that there is sigma convergence for all the effects with exception to the fossil fuel intensity, while gamma convergence was verified for all the effects, with exception of CO2 emissions by fossil fuel and fossil fuel intensity in Group B. From the econometric approach we concluded that the considered variables have a significant importance in explaining CO2 emissions and CO2 emissions intensity. In the third essay, the Tourism Industry in Portugal over 1996-2009 period was examined, specifically two groups of subsectors that affect the impacts on CO2 emissions intensity. The generalized variance decomposition and the impulse response functions pointed to sectors that affect tourism more directly, i. e. a bidirectional causality between the intensity of emissions and energy intensity. The effect of intensity of emissions is positive on energy intensity, and the effect of energy intensity on

  7. Three essays in transportation energy and environmental policy

    Science.gov (United States)

    Hajiamiri, Sara

    Concerns about climate change, dependence on oil, and unstable gasoline prices have led to significant efforts by policymakers to cut greenhouse gas (GHG) emissions and oil consumption. The transportation sector is one of the principle emitters of CO2 in the US. It accounts for two-thirds of total U.S. oil consumption and is almost entirely dependent on oil. Within the transportation sector, the light-duty vehicle (LDV) fleet is the main culprit. It is responsible for more than 65 percent of the oil used and for more than 60 percent of total GHG emissions. If a significant fraction of the LDV fleet is gradually replaced by more fuel-efficient technologies, meaningful reductions in GHG emissions and oil consumption will be achieved. This dissertation investigates the potential benefits and impacts of deploying more fuel-efficient vehicles in the LDV fleet. Findings can inform decisions surrounding the development and deployment of the next generation of LDVs. The first essay uses data on 2003 and 2006 model gasoline-powered passenger cars, light trucks and sport utility vehicles to investigate the implicit private cost of improving vehicle fuel efficiencies through reducing other desired attributes such as weight (that is valued for its perceived effect on personal safety) and horsepower. Breakeven gasoline prices that would justify the estimated implicit costs were also calculated. It is found that to justify higher fuel efficiency standards from a consumer perspective, either the external benefits need to be very large or technological advances will need to greatly reduce fuel efficiency costs. The second essay estimates the private benefits and societal impacts of electric vehicles. The findings from the analysis contribute to policy deliberations on how to incentivize the purchase and production of these vehicles. A spreadsheet model was developed to estimate the private benefits and societal impacts of purchasing and utilizing three electric vehicle

  8. PENILAIAN UJIAN BERTIPE ESSAY MENGGUNAKAN METODE TEXT SIMILARITY

    Directory of Open Access Journals (Sweden)

    Meiyanto Eko Sulistyo

    2015-07-01

    Full Text Available Exam is one way to measure the performance of students in the learning process. The type of test that is often tested on every student's learning activity is the description of the type of exam (essay. This study focuses on the manufacture of automatic assessment to test the extension of type descriptions using text similarity. This method has several stages such as text mining, text preprocessing algorithm to process stemming Nazief-Adriani, transforming text, then the assessment using tf-idf method, as well as cosine similarity. Results of this study is the final value assessment system using text similarity did not differ significantly from the results of expert assessment. This is proven by testing using paired T test with degrees of freedom (α of 5%, where the value ttabel> thitung (2,045> 0.3755 as well as the significant value> degrees of freedom (0.71> 0.05. However, there are several different types of questions that a significant result because there are unique characters that terrekam in the database as well as answers to the key does not contain relevant keywords that match the correct answer. Ujian adalah salah satu cara untuk mengukur performa siswa dalam proses belajar. Jenis ujian yang sering diujikan pada setiap kegiatan belajar siswa adalah tipe ujian uraian (essay. Penelitian ini berfokus pada pembuatan ekstensi penilaian otomatis untuk ujian bertipe uraian dengan menggunakan metode text similarity. Metode ini mempunyai beberapa tahapan seperti text mining, text preprocessing dengan proses stemming menggunakan algoritma Nazief-Adriani, text transforming, lalu penilaiannya menggunakan metode tf-idf, serta cosine similarity. Hasil penelitian ini adalah nilai akhir hasil penilaian menggunakan sistem text similarity tidak berbeda signifikan dengan hasil penilaian dari pakar. Hal ini dibuktikan dengan pengujian menggunakan uji T berpasangan dengan derajat kebebasan (α sebesar 5%, dimana nilai ttabel > thitung (2.045 > 0

  9. Three Essays In and Tests of Theoretical Urban Economics

    Science.gov (United States)

    Zhao, Weihua

    This dissertation consists of three essays on urban economics. The three essays are related to urban spatial structure change, energy consumption, greenhouse gas emissions, and housing redevelopment. Chapter 1 answers the question: Does the classic Standard Urban Model still describe the growth of cities? Chapter 2 derives the implications of telework on urban spatial structure, energy consumption, and greenhouse gas emissions. Chapter 3 investigates the long run effects of minimum lot size zoning on neighborhood redevelopment. Chapter 1 identifies a new implication of the classic Standard Urban Model, the "unitary elasticity property (UEP)", which is the sum of the elasticity of central density and the elasticity of land area with respect to population change is approximately equal to unity. When this implication of the SUM is tested, it fits US cities fairly well. Further analysis demonstrates that topographic barriers and age of housing stock are the key factors explaining deviation from the UEP. Chapter 2 develops a numerical urban simulation model with households that are able to telework to investigate the urban form, congestion, energy consumption and greenhouse gas emission implications of telework. Simulation results suggest that by reducing transportation costs, telework causes sprawl, with associated longer commutes and consumption of larger homes, both of which increase energy consumption. Overall effects depend on who captures the gains from telework (workers versus firms), urban land use regulation such as height limits or greenbelts, and the fraction of workers participating in telework. The net effects of telework on energy use and GHG emissions are generally negligible. Chapter 3 applies dynamic programming to investigate the long run effects of minimum lot size zoning on neighborhood redevelopment. With numerical simulation, comparative dynamic results show that minimum lot size zoning can delay initial land conversion and slow down demolition and

  10. A Pilot Intervention to Improve the Structural Quality of Exam Essay Writing in UK Undergraduate Psychology Students

    Science.gov (United States)

    Connelly, Vincent; Dockrell, Julie E.; Barnett, Jo

    2006-01-01

    Psychology undergraduates need to produce good quality essays in order to succeed at university. Students find the transition to university writing difficult. Using a rubric, a profile of student weakness in psychology essay writing was described. The students were generally poor at the structural organisation of their essays. A pilot intervention…

  11. PROCESS OF WRITING IN AN ESSAY WRITING TEST: DOES IT WORK?

    Directory of Open Access Journals (Sweden)

    AB Prabowo KA, S.Pd., M.Hum. AB Prabowo KA, S.Pd., M.Hum.

    2017-04-01

    Full Text Available In the writing teaching and learning, good students should involve process of writing in order to produce an effective writing. This statement is supported by Oshima (2006:3 that writing is as a process rather than a product. The process of writing includes prewriting, drafting, revising, editing and publishing. The process of writing is used to organize what the students think, plan and help them in writing a composition, especially an essay. It means that the ideas organized can be done through steps or procedures in the process of writing. However, the problem appears when students take an essay writing test. From the writer’s point of view, this process seems inapplicable in the test. Therefore, it is necessary for the writer to get further information on the factors related to the process of writing in the essay writing test. This qualitative study tries to answer the following questions: (1 Do lecturers acknowledge process of writing to the students? (2 Do students practice and apply process of writing in the essay writing tasks? (3 Does process of writing work in an essay writing test? In order to collect the data, test and questionnaire are applied. It is expected that students are able to apply the process of writing in the limited time such as an essay writing test. Therefore, the final draft of writing an essay is expected to be an effective writing.

  12. MR imaging of anterior knee pain: a pictorial essay.

    Science.gov (United States)

    Skiadas, Vasilios; Perdikakis, Evangelos; Plotas, Athanasios; Lahanis, Stefanos

    2013-02-01

    Anterior knee pathology is a frequent cause of joint pain and limitation of function and mobility among patients presenting to an orthopaedic department. Proper recognition and treatment of pathologic conditions depend on the knowledge of normal anatomy and of the various abnormalities, which affect this area of the knee and may present with anterior knee pain. A broad array of benign and malignant processes may be manifested as anterior knee discomfort, and this common clinical entity is among the most frequent indications for MR imaging of the lower extremities. Clinical history and physical examination are also of paramount importance. The disorders can be categorized and differentiated primarily according to their location. Traumatic or non-traumatic disorders of the patella, patellar retinacula, quadriceps and patellar tendons and supra or infrapatellar fat pad can be the source of symptoms. This article includes a comprehensive pictorial essay of the characteristic MR features of common and uncommon disorders causing anterior knee pain. For accurate assessment of the aforementioned clinical problem, a radiologist should be able to identify typical MR imaging patterns that contribute in establishing the correct diagnosis and thus tailoring the appropriate therapy. Level of evidence IV.

  13. PROBLEMS FACED BY INDONESIAN EFL LEARNERS IN WRITING ARGUMENTATIVE ESSAY

    Directory of Open Access Journals (Sweden)

    Wulan Rahmatunisa

    2014-12-01

    Full Text Available This study aims to find out problems in writing argumentative essay faced by Indonesian EFL learners. It is carried out in a qualitative research design as it attempted to describe the problems and their ways out. The data were taken from university students’ writing task and interview. The participants are the second year of university Indonesia students who enrol their study in English Department. Results of the data indicated that Indonesian EFL learners faced the problems in three categories, those are linguistics problems, cognitive problems, and psychological problems. Mostly, students faced problems in linguistics related to the grammatical structure (23.2%, formatting words (30.2%, words classes (16.3%, error in using words (9.3%, and the use of article (21%. Second, cognitive problems are related to organizing paragraph, difficulties in remaining word classes, getting lost the generic structure, making a conclusion, and putting punctuation. Last, psychological problems which included laziness, egoism, bad mood, and difficulties to start writing also faced by Indonesian EFL learners. Data analysis also indicated the problem solving which hopefully will be beneficial for EFL teachers in writing class. It is strongly recommended that the EFL class should strengthen all the language skills in general and writing in particular, motivate the students to use English with the teachers, introduce pair work, peer-correction, and use dictionaries frequently etc.

  14. Computed tomographic features of afferent loop syndrome: pictorial essay

    Energy Technology Data Exchange (ETDEWEB)

    Zissin, R. [Tel-Aviv Univ., Dept. of Diagnostic Imaging, Sapir Medical Center, Kfar Saba, Sackler Faculty of Medicine, Tel Aviv (Israel); Hertz, M. [Tel-Aviv Univ., Dept. of Diagnostic Imaging, Chaim Sheba Medical Center, Tel Hashomer, Tel Aviv (Israel); Paran, H. [Tel-Aviv Univ., Dept. of Diagnostic Imaging, Surgery ' A' , Sapir Medical Center, Kfar Saba, Sackler Faculty of Medicine, Tel Aviv (Israel); Osadchy, A. [Tel-Aviv Univ., Dept. of Diagnostic Imaging, Sapir Medical Center, Kfar Saba, Sackler Faculty of Medicine, Tel Aviv (Israel); Gayer, G. [Tel-Aviv Univ., Dept. of Diagnostic Imaging, Assaf Harofe Medical Center, Zrifin, Sackler Faculty of Medicine, Tel Aviv (Israel)

    2005-04-15

    This pictorial essay reviews the computed tomography (CT) findings of afferent loop syndrome (ALS) in various pathological conditions to demonstrate the contribution of a common imaging modality-that is, abdominal CT, used nowadays for various abdominal complaints-to the diagnosis of ALS. ALS is caused by obstruction of the duodenum and jejunum proximal to a gastrojejunostomy anastomosis. It is a rare complication after Billroth II subtotal gastrectomy and even more rare after total or subtotal gastrectomy with Roux-en-Y reconstruction. Although currently advanced medical treatment and endoscopic interventions have dramatically decreased the necessity of surgery for peptic ulcer disease, ALS may appear years after previously common operations. Alternatively, the use of surgical resection for early gastric cancer nowadays leads to an increasing rate of malignancy-related ALS. Clinically, ALS may be difficult to diagnose as its presentation may be vague and nonspecific, but it has a characteristic appearance on CT. Clinicians and radiologists should therefore be familiar with this rare complication. Prompt recognition and correct diagnosis of this syndrome and its probable etiology are important as a guide for treatment. This review illustrates the CT features of ALS in various conditions. (author)

  15. Essays in the history of Lie groups and algebraic groups

    CERN Document Server

    Borel, Armand

    2001-01-01

    Lie groups and algebraic groups are important in many major areas of mathematics and mathematical physics. We find them in diverse roles, notably as groups of automorphisms of geometric structures, as symmetries of differential systems, or as basic tools in the theory of automorphic forms. The author looks at their development, highlighting the evolution from the almost purely local theory at the start to the global theory that we know today. Starting from Lie's theory of local analytic transformation groups and early work on Lie algebras, he follows the process of globalization in its two main frameworks: differential geometry and topology on one hand, algebraic geometry on the other. Chapters II to IV are devoted to the former, Chapters V to VIII, to the latter. The essays in the first part of the book survey various proofs of the full reducibility of linear representations of \\mathbf{SL}_2{(\\mathbb{C})}, the contributions of H. Weyl to representations and invariant theory for semisimple Lie groups, and con...

  16. Reading and Theorizing James Baldwin: A Bibliographic Essay

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    Conseula Francis

    2015-09-01

    Full Text Available Readers and critics alike, for the past sixty years, generally agree that Baldwin is a major African-American writer. What they do not agree on is why. Because of his artistic and intellectual complexity, Baldwin’s work resists easy categorization and Baldwin scholarship, consequently, spans the critical horizon. This essay provides an overview of the three major periods of Baldwin scholarship. 1963–73 is a period that begins with the publication of The Fire Next Time and sees Baldwin grace the cover of Time magazine. This period ends with Time declaring Baldwin too passé to publish an interview with him and with critics questioning his relevance. The second period, 1974–87, finds critics attempting to rehabilitate Baldwin’s reputation and work, especially as scholars begin to codify the African-American literary canon in anthologies and American universities. Finally, scholarship in the period after Baldwin’s death takes the opportunity to challenge common assumptions and silences surrounding Baldwin’s work. Armed with the methodologies of cultural studies and the critical insights of queer theory, critics set the stage for the current Baldwin renaissance.

  17. Neuroimaging findings of congenital Zika virus infection: a pictorial essay.

    Science.gov (United States)

    Zare Mehrjardi, Mohammad; Poretti, Andrea; Huisman, Thierry A G M; Werner, Heron; Keshavarz, Elham; Araujo Júnior, Edward

    2017-03-01

    Zika virus (ZIKV) is a mosquito-borne arbovirus from the Flaviviridae family. It had caused several epidemics since its discovery in 1947, but there was no significant attention to this virus until the recent outbreak in Brazil in 2015. The main concern is the causal relationship between prenatal ZIKV infection and congenital microcephaly, which has been confirmed recently. Moreover, ZIKV may cause other central nervous system abnormalities such as brain parenchymal atrophy with secondary ventriculomegaly, intracranial calcification, malformations of cortical development (such as polymicrogyria, and lissencephaly-pachygyria), agenesis/hypoplasia of the corpus callosum, cerebellar and brainstem hypoplasia, sensorineural hearing-loss, and ocular abnormalities as well as arthrogryposis in the infected fetuses. Postnatal (acquired) ZIKV infection usually has an asymptomatic or mildly symptomatic course, while prenatal (congenital) ZIKV infection has a more severe course and may cause severe brain anomalies that are described as congenital Zika syndrome. In this pictorial essay, we aim to illustrate the prenatal and postnatal neuroimaging findings that may be seen in fetuses and neonates with congenital Zika syndrome, and will discuss possible radiological differential diagnoses. A detailed knowledge of these findings is paramount for an early correct diagnosis, prognosis determination, and counseling of the affected children and families.

  18. Can that be right? essays on experiment, evidence, and science

    CERN Document Server

    Franklin, Allan

    1999-01-01

    In this collection of essays Allan Franklin defends the view that science provides us with knowledge about the world which is based on experimental evidence and on reasoned and critical discussion. In short, he argues that science is a reasonable enterprise. He begins with detailed studies of four episodes from the history of modern physics: (1) the early attempts to detect gravity waves, (2) how the physics community decided that a proposed new elementary particle, 17-keV neutrino, did not exist, (3) a sequence of experiments on K meson decay, and (4) the origins of the Fifth Force hypothesis, a proposed modification of Newton's Law of Universal Gravitation. The case studies are then used to examine issues such as how discord between experimental results is resolved, calibration of an experimental apparatus and its legitimate use in validating an experimental result, and how experimental results provide reasonable grounds for belief in both the truth of physical theories and in the existence of the entities ...

  19. ESSAY ON THE EFFECTIVENESS OF THE COLLECTIVE PROTECTION IN PORTUGAL

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    Luciano Picoli Gagno

    2017-08-01

    Full Text Available This essay aims to examine certain aspects concerning collective judicial process by the light of some Portuguese cases, having as base the collective judicial protection understood as a fundamental right. With regard to the employed research method, the approach is the qualitative one, while the method is the deductive and the technique is the bibliographic e jurisprudential research. The theoretical framework is based on the doctrine and theory of some of the cited authors during the research. Among them are Robert Alexy, Mauro Cappelletti and Bryant Garth. In addition, this paper is divided into three sections: the first one is a brief study on access to justice clarified as a fundamental right of the citizen. In the second section a parallel is made with the first one, but the collective judicial protection is therefore seen as a fundamental right. In the third and last section we have the analysis of four cases of two superior courts of Portugal, being them the Supreme Court of Justice (STJ and the Supreme Administrative Court (STA, in order to understand the collective process in Portugal and to see which points that can offer a contribution for the brazilian collective procedural technic. As a result, it is found that collective judicial protection is inevitable and immanent for a substantial vision of the fundamental right of access to justice, understood like a orders of optimization, that may his realization in the biggest measure is possible

  20. Pictorial essay: Vascular interventions in extra cranial head and neck

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    Suyash S Kulkarni

    2012-01-01

    Full Text Available Medicine is an ever changing field and interventional radiology (IR procedures are becoming increasingly popular because of high efficacy and its minimally invasive nature of the procedure. Management of disease processes in the extra cranial head and neck (ECHN has always been a challenge due to the complex anatomy of the region. Cross sectional imaging of the ECHN has grown and evolved tremendously and occupies a pivotal and integral position in the clinical management of variety of head and neck pathologies. Advances in angiographic technologies including flat panel detector systems, biplane, and 3-dimensional rotational angiography have consolidated and expanded the role of IR in the management of various ECHN pathologies. The ECHN is at cross roads between the origins of great vessels and the cerebral vasculature. Thorough knowledge of functional and technical aspects of neuroangiography is essential before embarking on head and neck vascular interventions. The vessels of the head and neck can be involved by infectious and inflammatory conditions, get irradiated during radiotherapy and injured due to trauma or iatrogenic cause. The ECHN is also a common site for various hypervascular neoplasms and vascular malformations, which can be treated with endovascular and percutaneous embolization. This pictorial essay provides a review of variety of ECHN pathologies which were managed by various IR procedures using different approaches.

  1. Review Essay: Situational Analysis—Strauss Meets Foucault?

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    Rainer Diaz-Bone

    2012-11-01

    Full Text Available With the (German translation of the volume "Situational Analysis" by Adele CLARKE, a new approach to the development of Grounded Theory Methodology (GTM is presented. CLARKE radicalizes the methodological standpoint of classical pragmatism. She integrates structuralist and post-structuralist analytic elements into GTM. This review essay critically analyzes this new integration and employs the methodological notion of the "theory/methods package" introduced by CLARKE, which denotes the cohesion of theory, methodology and methods, and can be conceived as a kind of “methodic holism” (not to be confused with the different concept of methodological holism. CLARKE puts more emphasis on objects and power than classical GTM, and attempts to integrate a FOUCAULTian discourse model. However, she does not succeed in integrating the pragmatic and structuralist/post-structuralist methodologies in a fully coherent way. Her situational analysis does not incorporate a discourse-analytic methodology, and has not implemented the methods needed for a FOUCAULTian discourse analysis. Nevertheless, this valuable work presents an important development in pragmatic social research. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1301115

  2. Use of the Genre-Based Approach to Teach Expository Essays to English Pedagogy Students

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    Eric Gómez Burgos

    2017-07-01

    Full Text Available The following article reports the results of an action research project conducted in a public university in Chile. The project consisted of exposing ten undergraduate students from an English pedagogy program to a genre-based approach to writing expository essays. During eight weeks the three stages of the genre-based approach, namely: deconstruction, joint construction, and individual construction, were adapted and developed with the participants. Results gave evidence that a genre-based approach to teaching expository essays is effective in this context because after the application of the action research project, the students’ compositions improved in comparison to the participants’ pre-intervention essays.

  3. How to improve nuclear security worldwide: Three young women win IAEA essay contest

    International Nuclear Information System (INIS)

    Li, Jeremy

    2016-01-01

    Three essays that provided actionable and innovative recommendations to strengthen nuclear security through stronger border controls, closer international cooperation and public education won the IAEA’s first ever nuclear security essay contest. In preparation for the International Conference on Nuclear Security: Commitments and Actions, the IAEA invited students and young professionals to submit essays focusing on challenges and recommendations to strengthen nuclear security. A panel of experts from the IAEA and the International Nuclear Security Education Network selected three winners from among the 353 submissions received. The winners will present their papers at the conference, taking place in Vienna in December 2016.

  4. How to improve nuclear security worldwide: Three young women win IAEA essay contest

    International Nuclear Information System (INIS)

    Li, Jeremy

    2016-01-01

    Three essays that provided actionable and innovative recommendations to strengthen nuclear security through stronger border controls, closer international cooperation and public education won the IAEA’s first ever nuclear security essay contest. In preparation for the International Conference on Nuclear Security: Commitments and Actions, the IAEA invited students and young professionals to submit essays focusing on challenges and recommendations to strengthen nuclear security. A panel of experts from the IAEA and the International Nuclear Security Education Network selected three winners from among the 353 submissions received. The winners will present their papers at the conference, taking place in Vienna in December 2016

  5. Avaliação da capacidade de identificação de prematuridades oclusais, por meio cortes paraxiais obtidos de tomografias computadorizadas de feixe cônico (Cone Beam)

    OpenAIRE

    Machado, Naila Aparecida de Godoi

    2010-01-01

    O objetivo deste estudo foi avaliar a capacidade de identificação de prematuridades oclusais, por meio de cortes paraxiais de tomografias computadorizadas de feixe cônico, confrontando o parecer destas imagens, estabelecido por profissionais de diferentes áreas odontológicas, com a análise clínica obtida por meio de marcações com papel carbono. Dezesseis pacientes jovens assintomáticos foram submetidos a um exame clínico inicial e em seguida foram confeccionados dispositivos...

  6. Detecção de fraturas radiculares em imagens de tomografia computadorizada de feixe cônico utilizando diferentes parâmetros de exposição e materiais intracanais

    OpenAIRE

    Pinto, Martina Gerlane de Oliveira

    2015-01-01

    O objetivo deste estudo foi avaliar a detecção de fraturas radiculares (FRs) em imagens de Tomografia Computadorizada de Feixe Cônico (TCFC) utilizando diferentes parâmetros de exposição e analisar a influência da guta- percha, do núcleo metálico fundido e do pino de fibra de vidro no diagnóstico das FRs, assim como a formação de artefatos em TCFC. Cento e sessenta dentes foram selecionados e divididos em quatro grupos de acordo com o material de preenchimento (sem guta-percha, com guta-perch...

  7. Comparação do comprimento de trabalho do canal radicular usando tomografia computadorizada de feixe cônico, radiografia periapical e localizador apical eletrônico

    OpenAIRE

    MORAIS, André Luiz Gomide de

    2012-01-01

    Introdução: Estratégias para obtenção do comprimento de trabalho para preparar e obturar canais radiculares têm sido tema relevante de discussão em Endodontia. O objetivo deste estudo foi comparar in vivo as medidas de comprimento de trabalho do canal radicular determinadas por meio da tomografia computadorizada de feixe cônico (TCFC) com as obtidas por meio de radiografia periapical e localizador apical eletrônico. Metodologia: Foram avaliados os comprimentos de trabalho dos canais radicular...

  8. Rhetorical Strategies Used in Indonesian Persuasive Essays Written by Students Majoring in Indonesian and in English

    Directory of Open Access Journals (Sweden)

    Bambang Budi Cahyono

    2016-02-01

    Full Text Available This study was aimed at comparing rhetorical strategies used in the Indonesian persuasive essays written by students majoring in Indonesian and those majoring in English. Two groups were involved: the third-year students of the Department of Indonesian Language and Literature and the fourth-year students of the English Department of the State University of Malang. They were asked to write persuasive essays on whether violence on TV programs should be restricted. The results showed that there was a significant difference between the rhetorical strategies in Indonesian persuasive essays written by students majoring in Indonesian and those written by students majoring in English. In general, the essays written by the students majoring in English were more successful than those written by the students majoring in Indonesian in terms of the superstructure of argument, the Toulmin model of informal reasoning, and the persuasive appeals

  9. Lesões traumáticas do parênquima pulmonar: aspectos na tomografia computadorizada Traumatic lung lesions: computed tomography findings

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    Alessandro Severo Alves de Melo

    2003-06-01

    Full Text Available As lesões pulmonares são achados freqüentes no trauma torácico, sendo cada vez mais diagnosticadas pela tomografia computadorizada, em especial pelo rápido tempo de aquisição decorrente da técnica helicoidal, que permite a avaliação de pacientes em estado grave, possibilitando a adoção de conduta terapêutica eficiente. Os autores estudaram 150 pacientes vítimas de trauma torácico submetidos a tomografia computadorizada, que apresentaram lesões pulmonares, representadas por contusões, atelectasias, lacerações e hematomas pulmonares. As contusões pulmonares se caracterizaram por consolidações e atenuação em vidro fosco, sendo as lesões pulmonares mais comuns. As atelectasias foram observadas com os padrões subsegmentar e compressiva, e foram a segunda lesão mais comum. As lacerações se apresentaram como consolidações com ar ou nível líquido no interior. Os hematomas pulmonares representaram a lesão pulmonar mais rara, presentes em apenas cinco casos, caracterizados por opacidades arredondadas. Neste trabalho o trauma torácico fechado predominou, com 120 casos, enquanto o trauma aberto ocorreu em 30 casos. As causas de trauma fechado, em ordem decrescente de freqüência, foram: colisão automobilística, atropelamento, queda de altura, acidente de motocicleta e espancamento. A forma penetrante de traumatismo torácico decorreu de duas causas de agressão: lesão por arma de fogo e lesão por arma branca.Traumatic lesions of the lung are common findings in patients with thoracic trauma. These lesions are increasingly diagnosed using computed tomography, mostly due to the fast acquisition time helical techniques that allow evaluation of critically ill patients and an efficient therapeutic management. The authors studied 150 patients with thoracic trauma submitted to computed tomography that demonstrated lung contusions, atelectasies, lacerations and hematomas. Lung contusions were the most frequent lesions

  10. Aspectos da tomografia computadorizada no linfoma em pacientes abaixo de 20 anos de idade Computed tomography findings in patients less than 20 years old with lymphoma

    Directory of Open Access Journals (Sweden)

    Adriana Moreira Viana Borba

    2007-04-01

    Full Text Available OBJETIVO: Descrever os achados gerais do linfoma em pacientes abaixo de 20 anos de idade e por subtipo histológico. MATERIAIS E MÉTODOS: Estudo retrospectivo do arquivo digital de tomografia computadorizada do Centro de Controle do Câncer do Hospital Universitário Pedro Ernesto da Universidade do Estado do Rio de Janeiro, no período de março de 2003 a julho de 2005. Dos 22 casos - 16 do sexo masculino e 6 do sexo feminino, com média de idade de 11,5 anos -, 12 eram do subtipo Hodgkin e 10 eram não-Hodgkin. RESULTADOS: Dos achados gerais, verificamos as linfonodomegalias mediastinais como o mais freqüente (59%, com predomínio no grupo Hodgkin (75%, seguido por hepatoesplenomegalia (50% e linfonodomegalias cervicais e retroperitoneais (27,3%. No subtipo Hodgkin houve predomínio do acometimento linfonodal, em sucessivas cadeias, seguido pela hepatoesplenomegalia (50%. Verificamos um caso de massa tonsilar unilateral, opacidade pulmonar em "vidro-fosco" e nódulos renais. No subtipo não-Hodgkin houve predomínio extranodal caracterizado por hepatoesplenomegalia (50%, espessamento de alça intestinal (40%, derrame pleural (30%, nódulo pulmonar (20%, ascite (10%, derrame pericárdico (10% e lesões ósseas mistas (10%. CONCLUSÃO: A tomografia computadorizada é de grande valia no diagnóstico, estadiamento e seguimento do linfoma, com achados de alerta como massa linfonodal, notadamente mediastinal, hepatoesplenomegalia, massa unilateral na tonsila e espessamento parietal de alça intestinal.OBJECTIVE: To describe the general findings of lymphoma and their histological patterns in patients less than 20 years old. MATERIALS AND METHODS: Twenty-two cases (16 male and 6 female, mean age 11.5 years from the digital archive of computed tomography at the Cancer Control Center of "Hospital Universitário Pedro Ernesto - Universidade do Estado do Rio de Janeiro", Rio de Janeiro, RJ, Brazil, were retrospectively analyzed in the period between

  11. O valor da fase sem contraste na tomografia computadorizada do abdome The role of the unenhanced phase in the routine abdominal computed tomography

    Directory of Open Access Journals (Sweden)

    Ana Paula Klautau Leite

    2008-10-01

    Full Text Available OBJETIVO: Determinar o valor agregado da fase sem meio de contraste da tomografia computadorizada do abdome em pacientes sem diagnóstico determinado ou em estadiamento tumoral. MATERIAIS E MÉTODOS: Estudo prospectivo e transversal em 100 pacientes consecutivos submetidos a tomografia computadorizada abdominal sem e com meio de contraste intravenoso. Dois examinadores avaliaram todos os exames, procurando estabelecer, através da fase com meio de contraste intravenoso (primeira análise e posteriormente através da fase sem contraste (segunda análise, o diagnóstico principal e os secundários em função da indicação clínica do exame. Mediu-se a freqüência de mudança diagnóstica decorrente da análise combinada das fases pré- e pós-contraste intravenoso. Casos que tiveram mudança diagnóstica foram avaliados por especialistas clínicos para determinar se implicaria mudanças de conduta. RESULTADOS: Diagnósticos principal e secundário foram modificados em 1 e 18 casos, respectivamente (p = 1,000; p = 0,143. Os diagnósticos modificados foram: esteatose, definição de nódulo em adrenal, nefrolitíase, classificação de cistos renais e calcificação hepática. Nos casos em que a fase sem contraste modificou o diagnóstico, os especialistas mudaram sua conduta em 14/19 (73% dos pacientes (p = 0,038. CONCLUSÃO: A fase sem contraste não modificou significativamente o diagnóstico principal ou secundário. Porém, as mudanças nos diagnósticos secundários influenciaram na conduta adotada pelos especialistas.OBJECTIVE: To determine the role of the unenhanced phase of abdominal computed tomography in patients without a definite diagnosis or undergoing tumor staging. MATERIALS AND METHODS: A prospective and transversal study was developed with 100 consecutive patients submitted to unenhanced and contrast-enhanced abdominal computed tomography. Two observers evaluated all the computed tomography images in the contrast-enhanced phase

  12. Essays on modeling derivative claims. Essay titles: Essay 1. Modeling energy commodity futures: Is seasonality part of it? Essay 2. Modeling corporate liabilities under regime-switching asset volatility

    Science.gov (United States)

    Todorova, Milena

    Essay 1. The paper analyzes the price dynamics of two commodity futures prices---crude oil and natural gas. Some of the latest models of commodity prices are tested here---the two-factor model of Schwartz-Smith (2000), which nests other important models developed earlier. The two-factor model includes a mean-reverting short-term deviation and uncertain equilibrium level to which prices gravitate. The Schwartz-Smith two-factor model is the base case model in the paper. The model parameters of the Schwartz-Smith two-factor model are estimated from traded futures on natural gas and crude oil, using the fixed maturity format I create for futures prices. Analysis of the variance structure of natural gas prices suggests seasonality. The model is estimated on seasonally adjusted data. Model-based seasonality approaches are developed---seasonal dummies and a three-factor model with a stochastic seasonality component of log spot prices. The prediction ability of the various parameterized and non-parameterized versions of models with seasonality is compared in-sample and out-of-sample. The volatility functions model, based on principal components extraction from daily data, with seasonality in short-term volatility, seems to have the best forecasting ability, followed by the two-factor model on Kendall-type deseasonalized data and the seasonal dummies specification. Essay 2. This paper contributes to the extant structural model literature by introducing a time-varying risk-shifting barrier, to model asset substitution, and studying its theoretical and empirical implications on corporate credit spreads. Risk-shifting is expected to affect the default component of corporate spreads, because by switching to a higher level of asset volatility, managers precipitate the onset of distress and endogenously alter the probability of default. I test cross-sectionally whether the risk of volatility regime switching, measured by agency cost, is priced in market corporate spreads. The

  13. Linfangioliomiomatose pulmonar: aspectos na tomografia computadorizada de alta resolução Pulmonary lymphangioleiomyomatosis: high-resolution computed tomography findings

    Directory of Open Access Journals (Sweden)

    Eduardo Curty Castro Netto

    2003-08-01

    Full Text Available Neste trabalho foram estudados, retrospectivamente, 17 pacientes com linfangioliomiomatose pulmonar diagnosticada por biópsia pulmonar a céu aberto. Todos os pacientes eram do sexo feminino, com idade média de 39,6 anos. Duas pacientes tiveram também o diagnóstico de esclerose tuberosa. As pacientes foram submetidas a tomografia computadorizada de alta resolução, cujos achados revelaram cistos com conteúdo gasoso, de formas variadas e com diferentes tamanhos, não ultrapassando 60 mm de diâmetro. A grande maioria tinha as paredes finas. Todos os cistos apresentaram distribuição difusa pelo parênquima pulmonar. Somente duas pacientes apresentaram pneumotórax associado. Nódulos parenquimatosos e espessamento de septos interlobulares não foram observados. Dessa forma, as características tomográficas utilizadas para o diagnóstico foram a ausência de nódulos e a presença de cistos de tamanhos variados, em geral menores que 20 mm, arredondados e distribuídos difusamente pelo parênquima pulmonar.We reviewed 17 cases of pulmonary lymphangioleiomyomatosis diagnosed by open lung biopsy. All patients were women with a mean age of 39.6 years. Tuberous sclerosis was diagnosed in two cases. The patients were submitted to high-resolution computed tomography that showed diffuse thin walled cystic lesions of less than 60 mm in diameter. Associated pneumothorax was seen in two cases. The main high-resolution computed tomography findings were diffuse, rounded, cystic lesions, generally of less than 20 mm in diameter.

  14. Hemorragia subaracnoídea com tomografia de crânio sem sinais de sangramento Subarachnoidal hemorrhage with cranial tomography without bleeding signals

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    Silvio Francisco

    1997-09-01

    Full Text Available Foram observados 23 casos de pacientes com suspeita clínica de hemorragia subaracnoídea (HSA, com tomografia de crânio (CT sem sinais de sangramento, com diagnóstico definitivo realizado por exame de líquido cefalorraquiano(LCR. Desses, 20 casos foram submetidos a angiografia cerebral. Estabeleceu-se a classificação clínica de Hunt & Hess. Os principais achados neste estudo foram:1 um terço dos pacientes apresentou intervalo de tempo entre o ictus e a realização da CT e do LCR entre 24 e 48 horas, período de maior sensiblidade da CT; 2 dos pacientes estudados com angiografia cerebral, 55% tiveram o diagnóstico de aneurisma com predomínio no território de carótida e cerebral anterior; 3 o grau clínico dominante foi Hunt & Hess I e II. Todos os achados encontrados demonstraram a necessidade da realização de LCR em suspeita de HSA sem sinais de sangramento na CT.We observed 23 pacients with clinical hypothesis of subarachnoidal hemorrhage (SAH having cranial tomography (CT without bleeding signals. The final diagnosis of SAH was made upon the cerebrospinal fluid (CSF results. Twenty cases were submitted to brain angiography. They were focused under the clinical classification of Hunt & Hess. The main results were: 1 1/3 of patients had interval time between 24 and 48 hours after ictus and before CT and CSF making; this was the most sensitive CT time; 2 55% of patients with brain angiography had aneurysm predominantly in the carotid and anterior cerebral artery territory; 3 the dominant clinical degree was Hunt & Hess I e II. Conclusion: the results demonstrate the need of CSF test in case of SAH clinical diagnosis with CT showing no bleeding signals.

  15. Quantificação das grandezas dosimétricas em exames de tomografia computadorizada pediátricos do abdome

    Directory of Open Access Journals (Sweden)

    Tiago da Silva Jornada

    2014-10-01

    Full Text Available Objetivo: Visando contribuir para o conhecimento das doses em tomografia computadorizada (TC, este trabalho teve o objetivo de quantificar grandezas dosimétricas associadas a exames do abdome em pacientes pediátricos, comparando-as com os níveis de referência em radiodiagnóstico (NRD. Materiais e métodos: O estudo foi realizado em dois hospitais, em um tomógrafo Toshiba Asteion single-slice e um GE BrightSpeed multi-slice. Medidas foram feitas com uma câmara de ionização tipo lápis e um objeto simulador de tronco de polimetilmetacrilato de 16 cm de diâmetro. Resultados: Os valores do índice ponderado de kerma no ar (CW não apresentaram diferenças significativas, porém, para as grandezas índice de kerma no ar volumétrico (CVOL, produto kerma-comprimento (PKL,CT e dose efetiva, as diferenças foram relevantes. Conclusão: Apenas o CW apresentou valores menores que os NRD, sugerindo que a otimização não seria necessária. Porém, os valores de PKL,CT e dose efetiva mostraram que há espaço para reduzir as doses de radiação pediátricas. Este trabalho ressalta a importância de avaliar todas as grandezas dosimétricas associadas aos exames por TC.

  16. Trauma dos ossos temporais e suas complicações: aspectos na tomografia computadorizada Temporal bone trauma and complications: computed tomography findings

    Directory of Open Access Journals (Sweden)

    Ana Maria Doffémond Costa

    2013-04-01

    Full Text Available A maioria das fraturas dos ossos temporais resulta de traumas cranianos bruscos, de alta energia, estando muitas vezes relacionadas a outras fraturas cranianas ou a politraumatismo. As fraturas e os deslocamentos da cadeia ossicular, na orelha média, representam umas das principais complicações das injúrias nos ossos temporais e, por isso, serão abordadas de maneira mais profunda neste artigo. Os outros tipos de injúrias englobam as fraturas labirínticas, fístula dural, paralisia facial e extensão da linha de fratura ao canal carotídeo. A tomografia computadorizada tem papel fundamental na avaliação inicial dos pacientes politraumatizados, pois é capaz de identificar injúrias em importantes estruturas que podem causar graves complicações, como perda auditiva de condução ou neurossensorial, tonturas e disfunções do equilíbrio, fístulas perilinfáticas, paralisia do nervo facial, lesões vasculares, entre outras.Most temporal bone fractures result from high-energy blunt head trauma, and are frequently related to other skull fractures or to polytrauma. Fractures and displacements of ossicular chain in the middle ear represent some of the main complications of temporal bone injury, and hence they will be more deeply approached in the present article. Other types of injuries include labyrinthine fractures, dural fistula, facial nerve paralysis and extension into the carotid canal. Computed tomography plays a fundamental role in the initial evaluation of polytrauma patients, as it can help to identify important structural injuries that may lead to severe complications such as sensorineural hearing loss, conductive hearing loss, dizziness and balance dysfunction, perilymphatic fistulas, facial nerve paralysis, vascular injury and others.

  17. Essays on Monetary Integration, Inflation, and Trade Competitiveness in Transition Countries

    OpenAIRE

    Uzagalieva, Ainura

    2006-01-01

    This dissertation contains three essays focused on macroeconomic issues in the Commonwealth Independent States (CIS). The aim of the first essay is to analyze the possible impact of planned monetary integration on public sector revenues from seigniorage in Belarus, Kazakhstan and Russia. Using the concept of total gross seigniorage, the main sources and uses of the central bank revenues in these countries is investigated. Special attention is given to the role of seigniorage revenues in finan...

  18. Knighthoods of christ: Essays on the history of the crusades and the knights Templar

    DEFF Research Database (Denmark)

    Fonnesberg-Schmidt, Iben

    2008-01-01

    Anmeldelse af Knighthoods of Christ: Essays on the History of the Crusades and the Knights Templar. Presented to Malcolm Barber, ed. Norman Housley (Aldershot: Ashgate, 2007; pp. xxiii + 257. £55). Udgivelsesdato: 2008......Anmeldelse af Knighthoods of Christ: Essays on the History of the Crusades and the Knights Templar. Presented to Malcolm Barber, ed. Norman Housley (Aldershot: Ashgate, 2007; pp. xxiii + 257. £55). Udgivelsesdato: 2008...

  19. The pedagogy of essay-writing in rural Northern Province schools

    OpenAIRE

    2014-01-01

    M.Ed. (Educational Linguistics) This study focuses on the pedagogy of essay-writing in five randomly chosen rural Northern Province senior secondary schools. The aim of the research was to investigate the low standard of essay-writing of ten English Second Language Standard 10 students from the five schools. The case study design which included mostly qualitative methods was used for data collection. The qualitative research methodology was applied by the researcher in order to look closel...

  20. Essays on globalization : policies in trade, development, resources and climate change

    OpenAIRE

    Kerkelä, Leena

    2009-01-01

    This dissertation on globalization consists of an introduction on the methodology applied, a summary and four independent essays focussing on applied policy research in international trade. The study follows the CGE (Computable General Equilibrium) research tradition. The simulation environment is the publicly available GTAP model. The essays examine the specific topics of trade and aid policies, price liberalization of the Russian energy markets, trade preferences in the sugar sector of the ...

  1. Change, Institutions, and International Organisations : Essays on the English School of International Relations

    OpenAIRE

    Friedner Parrat, Charlotta

    2017-01-01

    The overall topic of this thesis is the English School understanding of international order, which I approach specifically by analysing the English School idea of international institutions and their change. The purpose is to develop the theory in a meta-theoretically conscious and coherent way. The three essays in this volume are independent in relation to each other, yet in some ways cumulative. Essays I and II aim to address primarily the question of how to conceptualise the current intern...

  2. Use of X-ray essay and fluoroscopy in the armament industry

    International Nuclear Information System (INIS)

    Bohnsack, G.

    1989-01-01

    Of the nondestructive testing the process of test by radiography has a special place. With view to great variety of problems of essays in the armament industry, the X-Ray radiography has excellent possibilities of testing, that not possible, for example, with ultrasonography. Different possibilities that the X-ray radiography offer to essays of grenade and blasting cap, through practice examples described case to case are presented. (V.R.B.)

  3. Essays on Labour Markets: Worker-Firm Dynamics, Occupational Segregation and Workplace Conditions

    OpenAIRE

    Buhai, Sebastian

    2008-01-01

    textabstractThe main chapters of this book, “Essays on Labour Markets”, focus on analyzing the dynamics of the employment relationship between workers and firms (chapters 2 and 3), modelling occupational segregation and labour market inequalities between social groups (chapter 4) and characterizing the link between a firm’s health & safety work conditions and its financial performance (chapter 5). Each essay contributes with original insights often using innovative and uncommon techniques, su...

  4. New molecular targets for PET and SPECT imaging in neurodegenerative diseases Novos alvos moleculares para tomografia por emissão de pósitrons (PET e tomografia computadorizada por emissão de fóton único (SPECT em doenças neurodegenerativas

    Directory of Open Access Journals (Sweden)

    Marcel Benadiba

    2012-10-01

    Full Text Available The pathophysiology of neurodegenerative diseases (ND such as Alzheimer's disease (AD and Parkinson's disease (PD has not yet been completely elucidated. However, in the past few years, there have been great knowledge advances about intra-and extracellular proteins that may display impaired function or expression in AD, PD and other ND, such as amyloid beta (Aβ, α-synuclein, tau protein and neuroinflammatory markers. Recent developments in the imaging techniques of positron emission tomography (PET and single photon emission computed tomography (SPECT now allow the non-invasive tracking of such molecular targets of known relevance to ND in vivo. This article summarizes recent findings of PET and SPECT studies using these novel methods, and discusses their potential role in the field of drug development for ND as well as future clinical applications in regard to differential diagnosis of ND and monitoring of disease progression.A fisiopatologia das doenças neurodegenerativas (DN, tais como a doença de Alzheimer (DA e a doença de Parkinson (DP, ainda não é completamente compreendida. No entanto, nos últimos anos, houve grandes avanços em termos do conhecimento sobre proteínas intra e extracelulares, tais como beta-amiloide (Aβ, α-sinucleína, proteína tau e marcadores neuroinflamatórios, que podem ter sua função ou expressão prejudicada na DA, DP ou em outras DN. Progressos recentes nas técnicas de tomografia por emissão de pósitrons (PET e tomografia computadorizada por emissão de fóton único (SPECT permitem hoje em dia a identificação não invasiva de tais alvos moleculares in vivo. Este artigo resume descobertas recentes de estudos de PET e SPECT cerebral usando esses alvos moleculares inovadores e discute o papel potencial dessas técnicas no campo do desenvolvimento de novos medicamentos para as DN, bem como futuras aplicações clínicas em relação ao diagnóstico diferencial e monitoramento da progressão dessas

  5. EFL Students’ Responses on Learning Academic Essays in Indonesian Higher Education

    Directory of Open Access Journals (Sweden)

    Syayid Sandi Sukandi

    2017-02-01

    Full Text Available This article provides investigation on EFL students’ responses related to learning writing academic essays in the context of higher education in one of private universities in Indonesia. The gap that is studied in this research is related to rarity of English writing instructors in identifying what their students’ responses towards their learning process after completing an essay writing course and how the responses present significant ideas on improving writing instructors’ pedagogical practices in writing classrooms. Scope of this research is teaching and learning English writing within the context of English as a foreign language. Field of this research is English composition studies. This research applies a quantitative non-experiment design, with descriptive as its method and questionnaire as its instruments. Findings show that students view English writing in neutral attitude; meanwhile, writing thesis statement in an academic essay is the most difficult part to write (40.59% of all respondents, and grammar and punctuation in writing essay is the most difficult aspect of essay writing (51.96% of all respondents. In brief, this research shows that recognising which aspect of the academic essay that is difficult for the students and which element is hard for them is crucial for adjusting pedagogical practices for English writing instructors and improving quality of their teaching gradually in Indonesia

  6. Infecção pulmonar pelo Rhodococcus equi na síndrome da imunodeficiência adquirida: Aspectos na tomografia computadorizada Rhodococcus equi infection in acquired immunodeficiency syndrome: Computed tomography aspects

    Directory of Open Access Journals (Sweden)

    Edson Marchiori

    2006-10-01

    Full Text Available OBJETIVO: Apresentar os aspectos na tomografia computadorizada da pneumonia pelo Rhodococcus equi em sete pacientes com síndrome da imunodeficiência adquirida. MÉTODOS: Estudo retrospectivo das tomografias de sete pacientes com síndrome da imunodeficiência adquirida e infecção pelo Rhodococcus equi. RESULTADOS: Os achados mais freqüentes foram: consolidação (n = 7 com escavação (n = 6, opacidades em vidro fosco (n = 6, nódulos do espaço aéreo (n = 4 e nódulos centrolobulares com árvore em brotamento (n = 3. CONCLUSÃO: Os achados mais comuns na infecção pulmonar pelo Rhodococcus equi em pacientes com síndrome da imunodeficiência adquirida foram as consolidações escavadas.OBJECTIVE: To present the computed tomography aspects of Rhodococcus equi pneumonia in seven patients with acquired immunodeficiency syndrome. METHODS: A retrospective study of the computed tomography scans of seven patients with acquired immunodeficiency syndrome and Rhodococcus equi infection. RESULTS: The most common findings were consolidation (n = 7, consolidation with cavitation (n = 6, ground glass opacities (n = 6, peribronchial nodules (n = 4 and centrilobular nodules presenting a "tree-in-bud" pattern (n = 3. CONCLUSION: The most common finding in patients with Rhodococcus equi pulmonary infection and acquired immunodeficiency syndrome was consolidation with cavitation.

  7. Determinação das coordenadas na tomografia computadorizada estereotáxica: simplificação do método convencional Determination of the coordinates in the stereotactic computed tomography: simplification of the conventional method

    Directory of Open Access Journals (Sweden)

    Sebastião Silva Gusmão

    2002-09-01

    Full Text Available Apresenta-se uma simplificação dos métodos gráfico e aritmético usualmente utilizados para determinação das coordenadas estereotáxicas de um alvo na tomografia computadorizada. O cálculo aritmético, além de mais simples, é teoricamente mais preciso por medir as coordenadas do alvo a partir de um ponto real do espaço estereotáxico. O diagrama (método gráfico proposto apresenta a vantagem de permitir a determinação das coordenadas estereotáxicas do alvo independentemente do tamanho das imagens da tomografia computadorizada.A simplification of the graphic and arithmetical method traditionally used for determination of the target stereotactic coordinates in the computed tomography is presented. The arithmetical calculation, besides simpler, is theoretically more accurate for using a real point of the stereotactic space. The proposed diagram (graphic method presents the advantage of allowing the determination of the target stereotactic coordinates independently of the computed tomographic image size.

  8. "O Ensaio como Forma" ou Um Ensaio acerca da Teoria Critica da Sociedade ("The Essay as Form" or An Essay about the Critical Theory of Society).

    Science.gov (United States)

    Giordano, Rosely

    2000-01-01

    Illuminates the critical theory project, with themes permeating the theoretical constructions of Frankfurt (Germany). Debates the predominance of positivism in the production of knowledge. Speculates that "the essay as form" constitutes itself as a representation of the concept of the Enlightenment. Concludes with a dialogue between…

  9. The Information Search Process (the ISP) and the Research Essay. How One School Library Supports Student Learning by Using the ISP as the Framework for the Extended Essay

    Science.gov (United States)

    Reynolds, Helen

    2010-01-01

    Queensland Academy for Health Sciences (QAHS) is a senior secondary high school offering the International Baccalaureate (IB) Diploma Programme (DP). As part of the Diploma, students are required to complete a referenced research essay of four thousand words. For most, this will be their first experience of such a challenging undertaking.…

  10. Essays on pricing dynamics, price dispersion, and nested logit modelling

    Science.gov (United States)

    Verlinda, Jeremy Alan

    The body of this dissertation comprises three standalone essays, presented in three respective chapters. Chapter One explores the possibility that local market power contributes to the asymmetric relationship observed between wholesale costs and retail prices in gasoline markets. I exploit an original data set of weekly gas station prices in Southern California from September 2002 to May 2003, and take advantage of highly detailed station and local market-level characteristics to determine the extent to which spatial differentiation influences price-response asymmetry. I find that brand identity, proximity to rival stations, bundling and advertising, operation type, and local market features and demographics each influence a station's predicted asymmetric relationship between prices and wholesale costs. Chapter Two extends the existing literature on the effect of market structure on price dispersion in airline fares by modeling the effect at the disaggregate ticket level. Whereas past studies rely on aggregate measures of price dispersion such as the Gini coefficient or the standard deviation of fares, this paper estimates the entire empirical distribution of airline fares and documents how the shape of the distribution is determined by market structure. Specifically, I find that monopoly markets favor a wider distribution of fares with more mass in the tails while duopoly and competitive markets exhibit a tighter fare distribution. These findings indicate that the dispersion of airline fares may result from the efforts of airlines to practice second-degree price discrimination. Chapter Three adopts a Bayesian approach to the problem of tree structure specification in nested logit modelling, which requires a heavy computational burden in calculating marginal likelihoods. I compare two different techniques for estimating marginal likelihoods: (1) the Laplace approximation, and (2) reversible jump MCMC. I apply the techniques to both a simulated and a travel mode

  11. Essays on forecasting stationary and nonstationary economic time series

    Science.gov (United States)

    Bachmeier, Lance Joseph

    This dissertation consists of three essays. Chapter II considers the question of whether M2 growth can be used to forecast inflation at horizons of up to ten years. A vector error correction (VEC) model serves as our benchmark model. We find that M2 growth does have marginal predictive content for inflation at horizons of more than two years, but only when allowing for cointegration and when the cointegrating rank and vector are specified a priori. When estimating the cointegration vector or failing to impose cointegration, there is no longer evidence of causality running from M2 growth to inflation at any forecast horizon. Finally, we present evidence that M2 needs to be redefined, as forecasts of the VEC model using data on M2 observed after 1993 are worse than the forecasts of an autoregressive model of inflation. Chapter III reconsiders the evidence for a "rockets and feathers" effect in gasoline markets. We estimate an error correction model of gasoline prices using daily data for the period 1985--1998 and fail to find any evidence of asymmetry. We show that previous work suffered from two problems. First, nonstationarity in some of the regressors was ignored, leading to invalid inference. Second, the weekly data used in previous work leads to a temporal aggregation problem, and thus biased estimates of impulse response functions. Chapter IV tests for a forecasting relationship between the volume of litigation and macroeconomic variables. We analyze annual data for the period 1960--2000 on the number of cases filed, real GDP, real consumption expenditures, inflation, unemployment, and interest rates. Bivariate Granger causality tests show that several of the macroeconomic variables can be used to forecast the volume of litigation, but show no evidence that the volume of litigation can be used to forecast any of the macroeconomic variables. The analysis is then extended to bivariate and multivariate regression models, and we find similar evidence to that of the

  12. Essays on globalization. Policies in trade, development, resources and climate change

    Energy Technology Data Exchange (ETDEWEB)

    Kerkelae, L.

    2009-07-01

    This research study on globalization consists of an introduction on the methodology applied, a summary and four independent essays focussing on applied policy research in international trade. The study follows the CGE (Computable General Equilibrium) research tradition. The simulation environment is the publicly available GTAP model. The essays examine the specific topics of trade and aid policies, price liberalization of the Russian energy markets, trade preferences in the sugar sector of the EU and the role of carbon sinks in mitigating climate change. The first essay examines trade and aid policies in Mozambique. The essay analyses the impact of alternative options like trade agreements, aid and trade facilitation. The results suggest that Mozambique has very little to gain from trade agreements or the Doha Round, although some agreements with the EU do yield some benefit. Trade facilitation and aid-for-trade programs on the other hand have the potential for larger benefits. The second essay examines the impact of liberalising RussiaAEs energy sector. The analysis is based on the implicit subsidies in regulated prices of electricity and gas and focuses on the effect of the different taxes and subsidies with respect to welfare and GDP in Russia and abroad. Increases in the price of electricity and gas improve efficiency and shift output from domestic markets to exports. The third essay investigates the impact of liberalising the EUAEs sugar sector by taking into account the complex structure of the EU sugar market and preferences in imports for developing countries. The fourth essay focuses on the effects of including carbon sinks into the analysis of the impacts of the Kyoto agreement. (orig.)

  13. Medical students writing on death, dying and palliative care: a qualitative analysis of reflective essays.

    Science.gov (United States)

    Boland, Jason W; Dikomitis, Lisa; Gadoud, Amy

    2016-12-01

    Medical students and doctors are becoming better prepared to care for patients with palliative care needs and support patients at the end of life. This preparation needs to start at medical school. To assess how medical students learn about death, dying and palliative care during a clinical placement using reflective essays and to provide insights to improve medical education about end-of-life care and/or palliative care. Qualitative study in which all reflective essays written by third-year medical students in 1 year from a UK medical school were searched electronically for those that included 'death', 'dying' and 'palliative care'. The anonymised data were managed using QSR NVivo 10 software, and a systematic analysis was conducted in three distinct phases: (1) open coding; (2) axial coding and (3) selective coding. Ethical approval was received. 54 essays met the inclusion criteria from 241 essays screened for the terms 'death', 'dying' or 'palliative'; 22 students gave consent for participation and their 24 essays were included. Saturation of themes was reached. Three overarching themes were identified: emotions, empathy and experiential and reflective learning. Students emphasised trying to develop a balance between showing empathy and their emotional state. Students learnt a lot from clinical encounters and watching doctors manage difficult situations, as well as from their refection during and after the experience. Reflective essays give insights into the way students learn about death, dying and palliative care and how it affects them personally as well as the preparation that is needed to be better equipped to deal with these kinds of experiences. Analysis of the essays enabled the proposal of new strategies to help make them more effective learning tools and to optimise students' learning from a palliative care attachment. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

  14. Astr 101 Students' Attitudes Towards Essays On Transits, Eclipses And Occultations

    Science.gov (United States)

    D'Cruz, Noella L.

    2012-05-01

    Joliet Junior College, Joliet, IL offers a one semester introductory astronomy course each semester. We teach over 110 primarily non-science major students each semester. We use proven active learning strategies such lecture tutorials, think-pair-share questions and small group discussions to help these students develop and retain a good understanding of astrophysical concepts. Occasionally, we offer projects that allow students to explore course topics beyond the classroom. We hope that such projects will increase students' interest in astronomy. We also hope that these assignments will help students to improve their critical thinking and writing skills. In Spring 12, we are offering three short individual essay assignments in our face-to-face sections. The essays focus on transits, eclipses and occultations to highlight the 2012 transit of Venus. For the first essay, students will find images of transit and occultation events using the Astronomy Picture of the Day website and describe their chosen events. In addition, students will predict how variations in certain physical and orbital parameters would alter their particular events. The second essay involves transits, eclipses and occultations observed by spacecraft. Students will describe their transit event, their spacecraft's mission, orbital path, how the orbital path was achieved, etc. The third essay deals with transiting exoplanets. Students will choose at least two exoplanets from an exoplanet database, one of which has been discovered through the transit method. This essay will enable students to learn about detecting exoplanets and how they compare with our solar system. Details of the essay assignments and students' reactions to them will be presented at the meeting.

  15. HGSA DNA day essay contest winner 60 years on: still coding for cutting-edge science.

    Science.gov (United States)

    Yates, Patrick

    2013-08-01

    MESSAGE FROM THE EDUCATION COMMITTEE: In 2013, the Education Committee of the Human Genetics Society of Australasia (HGSA) established the DNA Day Essay Contest in Australia and New Zealand. The contest was first established by the American Society of Human Genetics in 2005 and the HGSA DNA Day Essay Contest is adapted from this contest via a collaborative partnership. The aim of the contest is to engage high school students with important concepts in genetics through literature research and reflection. As 2013 marks the 60th anniversary of the discovery of the double helix of DNA by James Watson and Francis Crick and the 10th anniversary of the first sequencing of the human genome, the essay topic was to choose either of these breakthroughs and explain its broader impact on biotechnology, human health and disease, or our understanding of basic genetics, such as genetic variation or gene expression. The contest attracted 87 entrants in 2013, with the winning essay authored by Patrick Yates, a Year 12 student from Melbourne High School. Further details about the contest including the names and schools of the other finalists can be found at http://www.hgsa-essay.net.au/. The Education Committee would like to thank all the 2013 applicants and encourage students to enter in 2014.

  16. Metadiscourse in persuasive essays by elementary students in South Korea and the US

    Directory of Open Access Journals (Sweden)

    Kim Il-Hee

    2017-05-01

    Full Text Available This study investigated metadiscourse in the persuasive essays of fourth graders from both urban and rural communities: 224 students in South Korea and 188 in the US. Each student was asked to write a persuasive essay in his or her native Korean or English in response to a story not previously read or discussed. Analysis with a taxonomy developed by Hyland (2004 indicated significant differences in the metadiscourse by country. In terms of interactive metadiscourse, South Korean students used more sentence-level transitions than U.S. students, who used more frame markers and endophoric markers. With regard to interactional metadiscourse, U.S. students used more hedges, boosters, engagement markers, and self-mentions in their essays. This study also compared the students′ essays by the type of community in which the writers lived. In the US the essays of students in rural communities contained more hedges, whereas those of students in urban areas included significantly more self-mentions. In South Korea, no significant difference was detected in the metadiscourse of students living in rural and urban areas.

  17. Essays on Industry Response to Energy and Environmental Policy

    Science.gov (United States)

    Sweeney, Richard Leonard

    This dissertation consists of three essays on the relationship between firm incentives and energy and environmental policy outcomes. Chapters 1 and 2 study the impact of the 1990 Clean Air Act Amendments on the United States oil refining industry. This legislation imposed extensive restrictions on refined petroleum product markets, requiring select end users to purchase new cleaner versions of gasoline and diesel. In Chapter 2, I estimate the static impact of this intervention on refining costs, product prices and consumer welfare. Isolating these effects is complicated by several challenges likely to appear in other regulatory settings, including overlap between regulated and non-regulated markets and deviations from perfect competition. Using a rich database of refinery operations, I estimate a structural model that incorporates each of these dimensions, and then use this cost structure to simulate policy counterfactuals. I find that the policies increased gasoline production costs by 7 cents per gallon and diesel costs by 3 cents per gallon on average, although these costs varied considerably across refineries. As a result of these restrictions, consumers in regulated markets experienced welfare losses on the order of 3.7 billion per year, but this welfare loss was partially offset by gains of 1.5 billion dollars per year among consumers in markets not subject to regulation. The results highlight the importance of accounting for imperfect competition and market spillovers when assessing the cost of environmental regulation. Chapter 2 estimates the sunk costs incurred by United States oil refineries as a result of the low sulfur diesel program. The complex, regionally integrated nature of the industry poses many challenges for estimating these costs. I overcome them by placing the decision to invest in sulfur removal technology within the framework of a two period model and estimate the model using moment inequalities. I find that the regulation induced between 2

  18. Valor da ultra-sonografia e da tomografia computadorizada no tratamento cirúrgico das neoplasias da glândula parótida

    Directory of Open Access Journals (Sweden)

    Margarida Maria dos Santos Antunes

    Full Text Available OBJETIVO: Avaliar o valor da ultra-sonografia (US e tomografia computadorizada (TC no planejamento cirúrgico das neoplasias da glândula parótida. MÉTODO: Estudo retrospectivo de 56 pacientes portadores de neoplasias da glândula parótida (43 benignas e 13 malignas, tratados nos Departamentos de Cirurgia de Cabeça e Pescoço/Otorrinolaringologia e Diagnóstico por Imagem do Hospital Heliópolis, Hosphel, São Paulo (1991 a 1999. Comparamos os achados por US (45 e TC (15 com os histopatológicos pós-cirúrgicos empregando-se o teste diagnóstico de sensibilidade e especificidade. RESULTADOS: Dos 45 exames de US, a consistência sólida foi diagnosticada em 33 casos (sensibilidade de 89% e especificidade de 50% e a cística em quatro casos (sensibilidade e especificidade de 50%. Quanto à localização no lobo superficial, houve coincidência em 31 casos (sensibilidade de 91,2% e especificidade em 36,5%, e para o lobo profundo em quatro casos (sensibilidade de 40% e especificidade de 88,6%. Quanto aos 15 exames de TC, a consistência sólida foi demonstrada em 13 casos (sensibilidade de 86,7% e especificidade de 0% e a cística em nenhum caso (sensibilidade de 0% e especificidade de 86,7%. Quanto à localização no lobo superficial, houve coincidência em um caso (sensibilidade de 20% e especificidade em 90%, e para o lobo profundo em nove casos (sensibilidade de 90% e especificidade de 20%. CONCLUSÕES: 1. A US foi o método de escolha para lesões sólidas no lobo superficial e falha no lobo profundo. 2. A TC foi o método de escolha para as lesões do lobo profundo, e falhou nas lesões císticas no lobo superficial.

  19. Prognóstico visual de 'crosslinking' para ceratocone com base em tomografia de córnea pré-operatória

    Directory of Open Access Journals (Sweden)

    Lopes Bernardo

    2014-08-01

    Full Text Available Objetivo: Verificar índices tomográficos do pré-operatório de pacientes com ceratocone submetidos à crosslinking corneano (CXL como fatores preditivos para a melhora na acuidade visual corrigidas (AVc após um ano. Métodos: Estudo retrospectivo que incluiu 63 olhos de 53 pacientes com ceratocone progressivo submetidos à CXL segundo o protocolo de Dresden: deseptelização corneana, riboflavina 0,1% por 30 minutos e luz ultra-violeta A (UVA a uma irradiância de 3mW/cm2 por 30 minutos. Foram avaliados exames de tomografia corneana com sistema de Scheimpflug rotacional (Pentacam, Oculus antes do CXL e a acuidade visual corrigida antes e após a cirurgia. A análise estatística foi feita com o teste de Kolmorov-Smirnov, teste t de student e curvas de característica operador-receptor (ROC. Resultados: Houve diferença estatisticamente significante (p<0,05 entre os pacientes que obtiveram melhora de AVc em um ano e os que não experimentaram melhora na AVc nesse período nos índices tomográficos pré-operatórios relacionados com espessura e volume corneano. Entre os pacientes que obtiveram melhora na AVc todos possuíam volume corneano em 6,0mm maior que 14,55mm3 e 97,2% deles possuíam volume corneano em 6,5mm maior que 17,76mm3. Assim como, 94,29% desses pacientes apresentavam paquimetria média em 4,0mm maior que 487 μm e 82,86% paquimetria no ponto mais fino maior de 421 μm. Conclusão: Pacientes com ceratocone menos avançado (volume e espessura da córnea maiores no período pré-operatório obtiveram mais chances de ter melhora da AVc um ano após CXL. Estudos prospectivos envolvendo outras variáveis relacionadas com a aberrometria total e o estudo biomecânico da córnea são relevantes para se aumentar a capacidade prognóstica do resultado após CXL.

  20. Hemorragia intraparenquimatosa encefálica espontânea: achados à tomografia computadorizada Spontaneous intraparenchymatous hemorrhage: findings at computed tomography

    Directory of Open Access Journals (Sweden)

    Celso Monteiro Soares

    2004-09-01

    Full Text Available Foram analisados os exames de tomografia computadorizada de crânio de 250 pacientes com hematoma intraparenquimatoso encefálico espontâneo em três diferentes hospitais na cidade do Rio de Janeiro, com o objetivo de se levantar os aspectos mais freqüentes desta doença. O hematoma intraparenquimatoso cerebral profundo foi o de maior incidência, seguido do lobar. Mais raramente foi observado sangramento cerebelar e do tronco cerebral. A faixa etária de acometimento mais freqüente foi entre 61 e 70 anos de idade. Não houve diferença expressiva quanto ao sexo predominante ou ao lado mais acometido, porém verificou-se que os homens são mais acometidos em uma faixa etária mais precoce do que as mulheres. A cefaléia foi o sintoma de maior freqüência e a hipertensão arterial esteve presente na maioria dos casos. A drenagem da hemorragia para o sistema ventricular ocorreu mais comumente nos hematomas profundos.Computed tomography studies of 250 patients with spontaneous hemorrhage were examined in three hospitals in the city of Rio de Janeiro. The goal of this study was to identify the aspects of this disease that appear most frequently in this type of exam. Deep intracerebral hematomas have had the highest incidence followed by lobar hemorrhage, with thalamus being more frequently affected. Cerebelar hemorrhage was much rarer, with brainstem bleeding observed in few patients. The age group with a peak incidence was at 61 to 70 years. Headache was the most frequently related symptom and elevated levels of blood pressure were found in most of the cases. There was no pronounced difference as to predominance in either sex or side most affected but it was observed that the onset of this disease occurs at an earlier age in men than in women. Blood draining into the ventricular system occurred more frequently in deep hematomas.

  1. Reconstrução do seio maxilar atrófico com enxerto autólogo de crista ilíaca: avaliação por tomografia computadorizada e radiografia panorâmica

    Directory of Open Access Journals (Sweden)

    André Luíz Zétola

    Full Text Available OBJETIVOS: As dificuldades para a utilização de implantes dentários osteointegrados em pacientes portadores de atrofia do seio maxilar justificaram o emprego de enxerto autólogo não vascularizado de crista ilíaca isolado ou associado à hidroxiapatita (HA em 14 pacientes submetidos a 25 procedimentos no Hospital das Nações, Curitiba, Paraná, portadores de atrofia do sinus maxilar. O objetivo foi avaliar comparativamente a precisão da tomografia computadorizada e da radiografia panorâmica, através da quantificação da neoformação óssea nesta estrutura. MÉTODOS: Foram selecionadas pacientes edentados, com altura óssea residual do rebordo gengival ao soalho do seio maxilar menor que 5mm. O enxerto medular de crista ilíaca fragmentada isolado ou misturado com HA foi colocado através da parede lateral no soalho atrófico da cuba maxilar por via submucosa. A avaliação quantitativa e qualitativa foi feita através da radiografia panorâmica e tomografia computadorizada, sendo utilizado na análise estatística a distribuição t de Student (prevalência de 0,05 para análise das variâncias, considerado que a leitura dos laudos radiológicos foi feita por dois especialistas, medindo a distância entre os pontos inferiores e superiores do enxerto no soalho do seio maxilar. RESULTADOS: Tivemos um ganho médio de 14,8mm em todos os procedimentos, com um erro maior que 3mm em 16 procedimentos (64% e incorporação satisfatória do enxerto ósseo suficiente para futuro implante dentário. CONCLUSÕES: A tomografia computadorizada foi o método de escolha na avaliação qualitativa e quantitativa da incorporação de enxerto autólogo não vascularizado em seio maxilar atrófico.

  2. A tomografia computadorizada de alta resolução na avaliação da toxicidade pulmonar por amiodarona High-resolution computed tomography of amiodarone pulmonary toxicity

    Directory of Open Access Journals (Sweden)

    Daniela Peixoto Consídera

    2006-04-01

    Full Text Available OBJETIVO: Avaliar as principais alterações identificadas na tomografia computadorizada de alta resolução do tórax em pacientes com toxicidade pulmonar pela amiodarona. MATERIAIS E MÉTODOS: Foram avaliadas dez tomografias computadorizadas de alta resolução de tórax de pacientes com pneumonite pela amiodarona, seis desses pacientes do sexo masculino e quatro do sexo feminino, com idade média de 73,5 anos. RESULTADOS: Os achados tomográficos mais relevantes foram opacidades lineares ou reticulares em seis casos (60%, pequenos nódulos com densidade elevada em seis casos (60%, consolidações densas em três casos (30% e aumento da densidade do parênquima hepático em cinco de oito casos em que havia estudo tomográfico do abdome superior (62,5%. CONCLUSÃO: A tomografia computadorizada de alta resolução é um exame importante na avaliação de pacientes com toxicidade pulmonar pela amiodarona, devendo ser realizada sempre que houver suspeita deste diagnóstico. O achado de espessamento de septos interlobulares associado a lesões com aumento de densidade é altamente sugestivo deste diagnóstico.OBJECTIVE: To evaluate the main findings of chest high-resolution computed tomography in patients with amiodarone pulmonary toxicity. MATERIALS AND METHODS: Ten patients - six male and four female, average age of 73.5 years - with amiodarone-induced pneumonitis have undergone chest high-resolution computed tomography. RESULTS: The most relevant tomographic findings were linear or reticular opacities in six cases (60%, small high density nodules in six cases (60%, dense consolidations in three cases (30% and increased density in the hepatic parenchyma in five of eight cases in which there was a superior abdomen CT scan (62.5%. CONCLUSION: The high-resolution computed tomography is a valuable non-invasive test for evaluating patients with amiodarone pulmonary toxicity and should always be performed when one suspects of the presence of this

  3. RATERS’ FATIGUE AND THEIR COMMENTS DURING SCORING WRITING ESSAYS: A CASE OF IRANIAN EFL LEARNERS

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    Amir Mahshanian

    2017-09-01

    Full Text Available Rating accuracy in writing among EFL learners is crucial in determining their English proficiency. Despite the importance of its accuracy, little is known about various factors may affect the accuracy of rating writing essays. This study examines how raters’ comments on EFL writing tasks change as a result of fatigue. To this end, four raters were selected and each given 28 essays to score and comment on. Six general types of raters’ comments (i.e., those on grammar, choice of words, organization, punctuation, dictation, and capitalization were into focus in this study. Overall, results suggested that fatigue affects raters’ frequency of comments on grammar, choice of words, and organization, and that raters’ comments on punctuation, dictation, and capitalization do not seem to change significantly due to the effect of fatigue. Furthermore, this study revealed that the most and least frequent comments in 112 scored essays were those on grammar and dictation, respectively.

  4. Tales from the front lines: the creative essay as a tool for teaching genetics.

    Science.gov (United States)

    Koehler, K E; Hawley, R S

    1999-07-01

    In contrast to the more typical mock grant proposals or literature reviews, we describe the use of the creative essay as a novel tool for teaching human genetics at the college level. This method has worked well for both nonmajor and advanced courses for biology majors. The 10- to 15-page essay is written in storylike form and represents a student's response to the choice of 6-8 scenarios describing human beings coping with various genetic dilemmas. We have found this tool to be invaluable both in developing students' ability to express genetic concepts in lay terms and in promoting student awareness of genetic issues outside of the classroom. Examples from student essays are presented to illustrate these points, and guidelines are suggested regarding instructor expectations of student creativity and scientific accuracy. Methods of grading this assignment are also discussed.

  5. Humanizing mathematics and its philosophy essays celebrating the 90th birthday of Reuben Hersh

    CERN Document Server

    2017-01-01

    This Festschrift contains numerous colorful and eclectic essays from well-known mathematicians, philosophers, logicians, and linguists celebrating the 90th birthday of Reuben Hersh. The essays offer, in part, attempts to answer the following questions set forth by Reuben himself as a focus for this volume: Can practicing mathematicians, as such, contribute anything to the philosophy of math? Can or should philosophers of math, as such, say anything to practicing mathematicians? Twenty or fifty years from now, what will be similar, and what will, or could, or should be altogether different: About the philosophy of math? About math education? About math research institutions? About data processing and scientific computing? The essays also offer glimpses into Reuben’s fertile mind and his lasting influence on the mathematical community, as well as revealing the diverse roots, obstacles and philosophical dispositions that characterize the working lives of mathematicians. With contributions from a veritable “w...

  6. Do Graphic Organizers Help Students Write an Essay Based on Expository Texts?

    Science.gov (United States)

    Schwartz, Alexa

    This study explores the use of graphic organizers to write and essay based on expository texts. Comprehension of the curriculum was measured through assessments for each lesson. Each lesson consisted of a different skill needed to write a complete essay. A pre and post test was used to identify what the students knew at the start of the lesson and how much they progressed by the end. This study was conducted in a STEM (science, technology, engineering and math) for fifth graders in a suburban school. The group included 19 students, all of which were included in this study. The results indicated that students scored higher on their post-assessments and learned more through the use of graphic organizers. Students gained a higher understanding of the curriculum when graphic organizers had been used. The results proved that students are more inclined to write a better essay when they are using graphic organizers.

  7. THE RHETORIC FEATURES OF ENGLISH AND INDONESIAN ESSAYS MADE BY EFL UNDERGRADUATE STUDENTS

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    Teguh Budiharso

    2006-01-01

    Full Text Available This study was aimed at analyzing the similarities and differences between English and Indonesian essays made by EFL undergraduate students. The problems rise from the transfer of first language (L1 cultural conventions to second language (L2 performance. Three rhetorical aspects: general patterns of thought (linear or non-linear, development of ideas, and coherence were compared and analyzed by using content analysis. The results of the analysis showed that EFL students devoted similar rhetoric features in writing English and Indonesian essays. The rhetoric similarity was shared in the use of linearity and non-linearity of ideas, the development of ideas in the whole essays as well as the coherence quality.

  8. Four essays on the economics of climate change - with a supplement

    International Nuclear Information System (INIS)

    Torvanger, A.

    1993-01-01

    Climate change has been a main environmental issue over the last decade. The atmospheric concentration of some trace gases are increased through various human activities. Some of these trace gases, the greenhouse gases (GHGs), are transparent to incoming solar radiation, but absorb the infrared radiation from the Earth's surface. Through this mechanism the GHGs are able to induce global warming and climate change, even if their concentration is relatively low. The essays of this dissertation relate to different aspects of the climate change issue. The first essay and the supplement analyze the carbon dioxide emission sources and the distribution of emissions. In the first essay, ''Manufacturing sector carbon dioxide emissions in nine OECD countries 1973-87'', the relation between carbon dioxide emissions in manufacturing and output, structure, energy source mix and technology is discussed. In the supplement, ''Global, regional and national carbon dioxide emissions 1949-86'', the geographical distribution and time series of emissions are described. The next three essays relate to various aspects of climate policy. In ''An optimal growth model for Norway with a carbon dioxide emissions constraint'', the focus is on the economic consequences of an emissions abatement policy implemented as a carbon tax on fossil fuels. The topic of the subsequent essay, ''Efficient contracts in a game of nations pursuing greenhouse gas emissions abatement'', is the design and enforcement by a policing institution of efficient contracts to reduce GHG emissions under country moral hazard. Finally, in the last essay, ''Uncertain change in an intergenerational planning model'', some long-term aspects of climate policy such as intergenerational equity and uncertainty are analyzed

  9. Three essays on the incentive structure of energy conservation programs

    Science.gov (United States)

    Okwelum, Edson Ogochukwu

    This dissertation is comprised of three related essays examining the potential effectiveness of government energy efficiency programs from both the producer and consumer perspectives. The first chapter is based on a paper I coauthored with Corey Lang. In this manuscript, I address the question of whether strategic behavior by consumers could result in the erosion of energy savings in a demand response program. Understanding how the strategic behavior of consumers affects the net benefits from a demand response program has policy implications because of the increasing importance that demand response has come to play in utility load and reliability management during peak times. Using data from a large field experiment in California in 2007, we test the hypothesis that under a technology program, consumers' strategic behavior results in outcomes that are opposite what is obtainable under a program with price incentive or based of behavior. Chapter II is also an empirical study which explores how the preferences of consumers for large and heavy vehicles imposes costs on society in the form of external costs of accident. This chapter looks at how fleet changes in weight distribution due to corporate average fuel economy and consumer demand for heavier vehicles results in fatalities. It is important to understand how consumer behavior affects the accident rates so that one can obtain unbiased estimates of accident costs that go into benefit-cost analysis of the impact of regulations in automobiles. Chapter three addresses how unobserved heterogeneity and sorting affect the estimates of the consumer willingness to pay for reduction in future gasoline costs. This tradeoff is important to policy makers and manufactures because it could help explain why manufacturers fail to adopt technologies for which the fuel savings far outweigh the costs. The remainder of the abstract provides a more detailed outlines of the three essays. Chapter 1 explores strategic behavior by

  10. Definição do nível da junção ureterovesical pela tomografia computadorizada Definition of ureterovesical junction level by computed tomography

    Directory of Open Access Journals (Sweden)

    Edison de Oliveira Freire Filho

    2006-12-01

    Full Text Available OBJETIVO: Definir o nível da implantação ureteral na bexiga através da tomografia computadorizada. MATERIAIS E MÉTODOS: Através de tomografia computadorizada da pelve com contraste endovenoso de 46 pacientes (31 homens e 15 mulheres com idade entre 18 e 45 anos, com pelo menos um dos ureteres contrastado pelo contraste excretado, medimos as distâncias do meato ureteral até o teto acetabular e a borda superior da sínfise púbica, além do volume da bexiga. Utilizamos o teste t de Student para avaliar se houve diferenças estatísticas entre grupos. RESULTADOS: O nível da implantação ureteral na bexiga foi, em média, 10,6 ± 8,1 mm abaixo do teto acetabular e, em média, 29,7 ± 9,5 mm acima da borda superior da sínfise púbica. Nos pacientes com volume de repleção vesical menor que 200 ml e maior ou igual a 200 ml os níveis da implantação ureteral na bexiga foram, em média, 11,6 ± 7,3 mm e 10,2 ± 8,4 mm abaixo do teto acetabular (p = 0,61 e, em média, 28,3 ± 7,3 mm e 30,3 ± 10,2 mm acima da borda superior da sínfise púbica (p = 0,52, respectivamente, e nos pacientes do sexo masculino e feminino foram, em média, 11,8 ± 8,0 mm e 8,3 ± 8,0 mm abaixo do teto acetabular (p = 0,17 e, em média, 27,7 ± 9,2 mm e 33,9 ± 8,8 mm acima da borda superior da sínfise púbica (p = 0,34, respectivamente. CONCLUSÃO: Calcificações localizadas abaixo de 3 cm do teto acetabular e abaixo de 1,5 cm acima da borda superior da sínfise púbica provavelmente não representam cálculos ureterais. O grau de repleção vesical e o sexo não interferem significativamente na posição do meato ureteral.OBJECTIVE: To define, by means of computed tomography, the level of ureteral implantation into de bladder. MATERIALS AND METHODS: We have measured the distances from the ureteral meatus to the acetabulum, and to the superior margin of the pubic symphysis, as well as the bladder volume, using contrast enhanced computed tomography of the pelvis

  11. Games in libraries essays on using play to connect and instruct

    CERN Document Server

    Kirsch, Breanne A

    2014-01-01

    Librarians are beginning to see the importance of game based learning and the incorporation of games into library services. This book is written for them--so they can use games to improve people's understanding and enjoyment of the library. Full of practical suggestions, the essays discuss not only innovative uses of games in libraries but also the game making process. The contributors are all well versed in games and game-based learning and a variety of different types of libraries are considered. The essays will inspire librarians and educators to get into this exciting new area of patron

  12. Between inner space and outer space. Essays on science, art, and philosophy.

    Science.gov (United States)

    Barrow, J. D.

    In this fascinating and entertaining collection of essays, the author addresses the many question that we ponder in our quest to discover the universe. Key topics are: the popularity of Big Science, and physics and cosmology in particular; life on other planets; issues of time and space and quantum reality; the ancient foundations of science, mathematics, and their most modern expression - complexity theory; and how science relates to religion and aesthetics. Taken as a whole, these thought-provoking essays provide a rich introduction to contemporary scientific debate.

  13. An essay concerning human understanding: how the cerebri anatome of Thomas Willis influenced John Locke.

    Science.gov (United States)

    Lega, Bradley C

    2006-03-01

    Neurosurgeons are familiar with the anatomic investigations of Thomas Willis, but his intellectual legacy actually extends into the arena of philosophy. John Locke was a student of Willis while at Oxford, and this essay explores how some of Willis's anatomic discoveries might have influenced the ideas Locke expressed in his Essay Concerning Human Understanding. It also includes historical information about 17th century England and the group of men (including Christopher Wren and Robert Boyle) who worked with Willis and founded the Oxford Experimental Philosophy Club, which became the Royal Society.

  14. The Multimedia Essay. The Information Technologies as a Tool for The Humanities’ Statements

    Directory of Open Access Journals (Sweden)

    Piotr Cichocki

    2012-06-01

    Full Text Available The article applies for the educational experiment practiced during last several years at The Institute of Ethnology and Culture Anthropology, University of Warsaw, related to the multimedia essay. More accomplished than a multimedia presentation, more connected with textual analysis than a movie or videoclip, the multimedia essay may be mean especially fitted to humanities’ statements. The kind of attempts may result in the new discoursive hypertextual field, however nowadays they deal with dilemmas connected with copyrights and corporative control under the datas. Therefore the science is entangled with processes of constant change in the legislation.

  15. Uma rara causa de dispnéia com apresentação singular na tomografia computadorizada de tórax: síndrome de ativação macrofágica

    OpenAIRE

    Brandão-Neto,Rodrigo Antônio; Santana,Alfredo Nicodemos Cruz; Danilovic,Debora Lucia Seguro; Bernardi,Fabíola Del Carlo; Barbas,Carmen Silvia Valente; Mendonça,Berenice Bilharinho de

    2008-01-01

    A síndrome de ativação macrofágica é uma doença rara e potencialmente fatal. Ela ocorre devido a uma alteração no sistema imunológico, com excessiva proliferação de macrófagos, geralmente causando hepatoesplenomegalia, pancitopenia e disfunção hepática. Neste artigo, relatamos uma raríssima apresentação da síndrome de ativação macrofágica como insuficiência respiratória, bem como a primeira descrição de nódulo escavado, vidro fosco e consolidação na tomografia computadorizada de alta resoluçã...

  16. Aplicação das técnicas de tomografia axial computorizada e ressonância magnética no diagnóstico de hérnia discal em cão

    OpenAIRE

    Cabral, Nádia Torres Militão

    2017-01-01

    Dissertação de Mestrado Integrado em Medicina Veterinária O objetivo deste trabalho consistiu numa descrição dos princípios físicos da tomografia axial computorizada (TAC) e da ressonância magnética (RM) e das caraterísticas imagiológicas das hérnias discais na espécie canina. Ao longo do trabalho, é feita uma revisão bibliográfica acerca da anatomia da coluna vertebral, abordagem ao paciente com suspeita de doença da coluna vertebral e considerações fisiopatológicas relativas ...

  17. Camada de fibras nervosas da retina em portadores de esquistossomose mansônica na forma hepatoesplênica: análise por tomografia de coerência óptica

    Directory of Open Access Journals (Sweden)

    Ana Carolina Celino

    2015-04-01

    Full Text Available Objetivo: Avaliar a espessura da camada de fibras nervosas da retina em portadores de esquistossomose mansônica na forma hepatoesplênica utilizando a tomografia de coerência óptica. Métodos: Realizou-se estudo observacional, analítico, de corte transversal. O grupo de doentes foi composto por 24 indivíduos (13 femininos e 11 masculinos, com idades variando entre 27 e 73 anos (55,7±11,6 anos. No grupo controle foram incluídos 22 indivíduos (12 femininos e 10 masculinos com idades entre 31 e 77 anos (55,4±16,5 anos. Dos 92 olhos avaliados, três foram excluídos por apresentarem opacidade de meios que impossibilitaram o exame. Todos os participantes foram submetidos ao exame oftalmológico completo e medida da camada de fibras nervosas da retina pela tomografia de coerência óptica. Resultados: A média das espessuras da camada de fibras nervosas da retina foi de 98,1±15,2μm no grupo de estudo e 114,2±10,0 μm no grupo controle (p<0,001. Conclusão: Observou-se diminuição significante da espessura da camada de fibras nervosas da retina, em todos os quadrantes, nos pacientes com esquistossomose mansônica na forma hepatoesplênica.

  18. Pneumonia pelo vírus influenza B pós-transplante de medula óssea: relato de caso com ênfase dos achados de tomografia computadorizada de alta resolução

    Directory of Open Access Journals (Sweden)

    Emerson L. Gasparetto

    2005-01-01

    Full Text Available Resumo: Doente do sexo masculino, 9 anos, transplantado de medula óssea devido leucemia mielóide aguda, apresentou febre e tosse seca três dias após o procedimento. A radiografia de tórax demonstrou infiltrado reticular difuso bilateral. A tomografia computadorizada de alta resolução do tórax revelou espessamento do interstício peribroncovascular, pequenos nódulos centrolobulares periféricos e áreas de atenuação em vidro fosco. O lavado broncoalveolar demonstrou pesquisa positiva por imunofluorescência direta para anticorpos anti-vírus influenza B. Foi instituído tratamento com ribavirina aerolizada durante 10 dias com melhoria clínico-radiológica do quadro infeccioso.Rev Port Pneumol 2005; XI (1: 63-66 Abstract: Nine year-old male patient, who underwent bone marrow transplantation because of acute myelogenous leukemia, presented with fever and dry cough three days after the procedure. The chest radiograph demonstrated bilateral diffuse reticular infiltrate. The high resolution computed tomography showed peribronchovascular interstitial thickening, peripheral small centrilobular nodules and areas of ground-glass attenuation. The bronchoalveolar lavage demonstrated positive direct fluorescence antibody testing against influenza B virus. Treatment with aerolizated ribavirin was instituted during 10 days and the patient showed clinical-radiological improvement.Rev Port Pneumol 2005; XI (1: 63-66 Palavras-chave: Vírus influenza B, tomografia computadorizada de alta resolução, transplante de medula óssea, Key-words: Influenza B virus, high resolution computed tomography, bone marrow transplantation

  19. Tomografia emissora de positrões: Indicações no cancro do pulmão – Experiência prospectiva de um serviço

    Directory of Open Access Journals (Sweden)

    Diva Ferreira

    2007-01-01

    Full Text Available Resumo: A tomografia emissora de positrões (PET é uma tecnologia recente no âmbito da medicina nuclear. Utiliza radionuclídeos biológicos como o 18 F-fluoro-2-deo-xy-D-glicose (FDG permitindo detectar locais onde o metabolismo está aumentado, como no caso de células neoplásicas. Tem vindo a tornar-se um inovador e importante meio imagiológico no cancro do pulmão. Recomendações actuais incluem o diagnóstico de cancro do pulmão, bem como o estadiamento loco-regional e à distancia do CPNPC.Rev Port Pneumol 2007; XIII (1: 35-51 Abstract: Positron emission tomography (PET is a new technique in nuclear medicine. It uses biological radiotracers such as 18 F-fluoro-2-deoxyglucose (FDG which permit the detection of suspected lesions with metabolic alterations that take up the glucose isotope too avidly, as is the case with neoplastic cells. PET has become an innovatory and important imaging tool for evaluating patients with lung cancer. The present recommended uses of PET include lung cancer diagnosis and the intrathoracic and extrathoracic staging in N-SCLC.Rev Port Pneumol 2007; XIII (1: 35-51 Palavras-chave: Tomografia emissora de positrões, cancro do pulmão, diagnóstico, estadiamento, Key-words: Positron emission tomography, lung cancer, diagnosis, staging

  20. Disección anatómica de la musculatura mímica facial: revisión iconográfica de apoyo a los tratamientos complementarios en rejuvenecimiento facial Anatomical dissection of the mimic facial musculature: iconographic review as a support to the complementary treatments in facial rejuvenation

    Directory of Open Access Journals (Sweden)

    C. Casado Sánchez

    2011-03-01

    Full Text Available A la hora de valorar las múltiples técnicas empleadas en el rejuvenecimiento facial y centrándonos de manera particular en aquellos procedimientos mínimamente invasivos complementarios a las intervenciones habituales en Cirugía Plástica-Estética, cobra especial relevancia el conocimiento exhaustivo de las estructuras musculares implicadas en la mímica facial. A tal efecto, se ha realizado un estudio anatómico en cadáveres frescos, en los que se han disecado las principales estructuras referidas. Se presenta un resumen iconográfico de los músculos faciales implicados, haciendo hincapié en su anatomía descriptiva y funcional, así como un recuerdo de las principales áreas problemáticas por alguna circunstancia especial (presencia de un nervio sensitivo o motor.To value the multiple technologies involved in facial rejuvenation and focusing in those minimally invasive complementary procedures to the usual Plastic and Aesthetic Surgeries, it´s very important the exhaustive knowledge of the muscular structures involved in the facial movements. To such an effect, an anatomical study has been realized in fresh corpses, dissecting the principal above-mentioned structures. We present an iconographic summary of the facial implied muscles, emphasizing in his descriptive and functional anatomy, as well as a recollection of the principal problematic areas for some special circumstance (presence of a sensory or motor nerve.

  1. Investigating Information Technologies in Disasters: Three Essays on Micro-Blogging and Free and Open Source Software (FOSS) Environment

    Science.gov (United States)

    Li, Pu

    2012-01-01

    This dissertation aims to investigate how advanced information technologies cope with the various demands of disaster response. It consists of three essays on the exploration of micro-blogging and FOSS environments. The first essay looks at the usage of micro-blogging in the aftermath of the massive 2008 China earthquake and explores the…

  2. The Impact of Interactive Whiteboard Technology on Medical Students' Achievement in ESL Essay Writing: An Early Study in Egypt

    Science.gov (United States)

    Albaaly, Emad; Higgins, Steven

    2012-01-01

    This study investigated the impact of the interactive whiteboard on Egyptian medical students' achievement in essay writing in English as a second language (ESL). First, the writing micro-skills judged essential to help these students improve their essay writing were identified, using a questionnaire which investigated experts' views. This gave…

  3. The Role of Women in Foreign-Language Textbooks: A Collection of Essays. Collection d'"Etudes linguistiques" No. 24.

    Science.gov (United States)

    Freudenstein, R., Ed.

    Essays that consider the way that women are portrayed in foreign language textbooks are presented. The selected essays were submitted to a competition sponsored by the Federation Internationale des Professeurs de Langues Vivantes, which requested that language teachers assess such concerns as: (1) whether women were described in a stereotyped way;…

  4. A Metacognitive Strategy for Teaching Essay Planning to E.S.L. Students: A Computer-Based Instructional Design.

    Science.gov (United States)

    Barnes, Mary Ellen; And Others

    A lesson in essay planning designed for college and graduate students of English as a Second Language is described. The intended audience is a group with varied linguistic backgrounds and levels of English proficiency. The lesson's objective is to develop metacognitive skills for planning well-organized essays. A computer program using graphics,…

  5. Automated Subscores for TOEFL iBT[R] Independent Essays. Research Report. ETS RR-11-39

    Science.gov (United States)

    Attali, Yigal

    2011-01-01

    The e-rater[R] automated essay scoring system is used operationally in the scoring of TOEFL iBT[R] independent essays. Previous research has found support for a 3-factor structure of the e-rater features. This 3-factor structure has an attractive hierarchical linguistic interpretation with a word choice factor, a grammatical convention within a…

  6. Cohesion and the Social Construction of Meaning in the Essays of Filipino College Students Writing in L2 English

    Science.gov (United States)

    Castro, Carolyn D.

    2004-01-01

    This study compares the degree of cohesion and coherence in the essays written by thirty Filipino college freshmen and analyzes how the social construction of meaning was made evident in their writing. Results showed that low, mid and highly rated essays were comparable in grammatical cohesive device use. Lexical repetition and use of synonyms…

  7. Reflecting on 25 Years of Teaching, Researching, and Textbook Writing for Introduction to Management: An Essay with Some Lessons Learned

    Science.gov (United States)

    Dyck, Bruno

    2017-01-01

    This essay describes innovations made and lessons learned while teaching introduction to management courses during a 25-year career. The essay describes how teaching two approaches to management increases students' critical and ethical thinking, and reverses the tendency for business students to become increasingly materialistic and…

  8. Patrick Bond. Cities of Gold, Townships of Coal: Essays on South

    African Journals Online (AJOL)

    the apartheid and post-apartheid city make this volume a lively, often passion- ate call for, as he puts it in one essay introduction, 'reconstructing the politics of social and community movements in response to the strains that globalization visits, so that we transcend both anarchic “IMF” riots and tame urban reform- ism' (p 23).

  9. Development and Psychometric Properties of the Emotional Intelligence Admission Essay Scale

    Directory of Open Access Journals (Sweden)

    Sharon A. Gutman

    2016-07-01

    Full Text Available The purpose was to describe the development and psychometric properties of the Emotional Intelligence Admission Essay scale. The authors developed an admission essay question and rating scale designed to provide information about applicants’ emotional intelligence (EI. Content validity, convergent validity, interrater reliability, and internal consistency were established. The scale was also examined to determine if it could discriminate between students with and without professional behavior problems in the academic and fieldwork settings. Content validity was found to be high by a panel of three experts in EI (content validity index = 1.0. Convergent validity with the Assessing Emotions Scale was moderate (r = .46, p < .02. Interrater reliability between two trained faculty raters was high (ICC = .91, p < .000. Internal consistency of the scale was high with a Cronbach’s alpha of .95. This version of the scale was not able to discriminate between students with and without professional behavior problems. The moderate to strong psychometric properties suggest that the EI Admission Essay Scale has the ability to provide information about applicants’ EI. The wording of the essay question must be modified to better instruct applicants to address interpersonal conflict.

  10. Using the Creative Cognition Approach in Essay Assignments in Leadership Education

    Science.gov (United States)

    Atkinson, Tim

    2018-01-01

    This application brief covers, "The Final Question," an alternative essay design that encourages the learner to think creatively in Ph.D. Organization Theory or Leadership courses. "The Final Question" asks, "Do leaders change organizations or do organizations change leaders?" It is a simple question, but only the…

  11. Effects of Analytical and Holistic Scoring Patterns on Scorer Reliability in Biology Essay Tests

    Science.gov (United States)

    Ebuoh, Casmir N.

    2018-01-01

    Literature revealed that the patterns/methods of scoring essay tests had been criticized for not being reliable and this unreliability is more likely to be more in internal examinations than in the external examinations. The purpose of this study is to find out the effects of analytical and holistic scoring patterns on scorer reliability in…

  12. The Multi-Disciplinary Graduate Program in Educational Research. Final Report, Part VI; Essays.

    Science.gov (United States)

    Lazarsfeld, Paul F., Ed.

    This document, the sixth of a final report on the Multi-Disciplinary Graduate Program in Educational Research, is a collection of three essays. The first--Notes on the History of Interdisciplinarity--by Judy Rosen, brings together and outlines the general points and findings of the literature that has been generated in an attempt to evaluate the…

  13. The mediator's moral dilemma: An essay in memory of H.W. van der ...

    African Journals Online (AJOL)

    the University of Pretoria. He also serves on the Expert Panel of the Bureau for Crisis. Prevention and Recovery of the United Nations Development Programme and the. Mediation Roster of the Mediation Support Unit of the United Nations Department of. Political Affairs. The mediator's moral dilemma: An essay in memory of.

  14. Edgeware Security Risk Management: A Three Essay Thesis on Cloud, Virtualization and Wireless Grid Vulnerabilities

    Science.gov (United States)

    Brooks, Tyson T.

    2013-01-01

    This thesis identifies three essays which contribute to the foundational understanding of the vulnerabilities and risk towards potentially implementing wireless grid Edgeware technology in a virtualized cloud environment. Since communication networks and devices are subject to becoming the target of exploitation by hackers (e.g. individuals who…

  15. Racial Integration and Learners from Limited Income Families--An Essay for American Educators.

    Science.gov (United States)

    Boyer, James B.

    The challenge of educating learners from limited-income families, combined with the challenge of racial integration in the schools, is discussed in this essay. Some learning problems among impoverished children are attributed to segregation, prejudice, and the class-caste system. The inadequacies of segregated schools serving minority groups as…

  16. Global warming is a myth (Winning Essay in British Council Youth ...

    African Journals Online (AJOL)

    After opening the essay with a contentious heading, Mr Siziba then discusses the issue of global warming being a reality and gives some suggestions what can be done to reduce the problem. The Zimbabwe Science News Volume 34(1) March 2001, pp. 19-20 ...

  17. Validating Automated Essay Scoring: A (Modest) Refinement of the "Gold Standard"

    Science.gov (United States)

    Powers, Donald E.; Escoffery, David S.; Duchnowski, Matthew P.

    2015-01-01

    By far, the most frequently used method of validating (the interpretation and use of) automated essay scores has been to compare them with scores awarded by human raters. Although this practice is questionable, human-machine agreement is still often regarded as the "gold standard." Our objective was to refine this model and apply it to…

  18. A Corpus Based Study on the Preposition Error Types in Turkish EFL Learners' Essays

    Science.gov (United States)

    Tunaz, Mehmet; Muyan, Emrah; Muratoglu, Nursel

    2016-01-01

    The purpose of this study was to investigate the categories of preposition errors made by EFL learners of elementary and intermediate proficiency levels by comparing the rate of preposition errors (addition, omission, substitution) to their total preposition uses in their essays, and by comparing the overall preposition usage of learners of both…

  19. Methodology for Urbanism AR2U090 : Best essays 2010-2012

    NARCIS (Netherlands)

    Rocco, R.C.

    2012-01-01

    These are essays written by students of the course AR2U090 Research and Design Methodology for Urbanism from 2010 to 2012. This is a 5 ECTS course given within the Masters in Urbanism programme of the TU Delft by Roberto Rocco and Egbert Stolk. At the end of the course students are asked to write an

  20. Three Accounts of Feminism and Women's Studies in Higher Education. Book Review Essay.

    Science.gov (United States)

    Rice, Suzanne

    1996-01-01

    Provides an integrative essay that explores three books and their contributions to feminism and women's studies in higher education. Indicates that only one of the three works managed to escape the tendency of academic and popular media to either valorize or demonize feminists and their pursuits. (MAB)

  1. Essays on the valuation of discretionary liabilities and pension fund investment policy

    NARCIS (Netherlands)

    Broeders, D.W.G.A.

    2010-01-01

    The four essays collected in this dissertation serve as a contribution to the broad field of pension finance. They focus on the economic understanding of liability valuation on the one hand and investment policy for pension funds on the other. The first article concerns the impact of the sponsor’s

  2. Jane Austen: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Watt, Ian, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Virginia Woolf, C. S. Lewis, Edmund Wilson, Ian Watt, Alan D. McKillop, Reuben A. Brower, Marvin Mudrick, Mark Schorer, Arnold Kettle, Lionel Trilling, Kingsley Amis, Andrew H. Wright, Donald J. Greene, and D. W.…

  3. Essay-Writing Strategy for Students Enrolled in a Postsecondary Program for Individuals with Developmental Disabilities

    Science.gov (United States)

    Woods-Groves, Suzanne; Therrien, William J.; Hua, Youjia; Hendrickson, Jo M.

    2013-01-01

    This study investigated the efficacy of a writing (ANSWER) strategy to improve the essay test responses of students who were enrolled in a campus-based, postsecondary education program for individuals with developmental disabilities. Random assignment to treatment or control groups and a pre- and posttest design were employed. Students used the…

  4. Drafting and acting on feedback supports student learning when writing essay assignments.

    Science.gov (United States)

    Freestone, Nicholas

    2009-06-01

    A diverse student population is a relatively recent feature of the higher education system in the United Kingdom. Consequently, it may be thought that more "traditional" types of assessment based around essay writing skills for science undergraduates may be of decreasing value and relevance to contemporary students. This article describes a study in which the process of feedback on, and associated redrafting of, an essay was closely supervised to improve essay writing skills and subsequent exam performance. The results of this study show that students can significantly improve their learning and academic performance, as assessed by final examination mark, by a process that more closely mimics a "real-world" situation of review and redrafting. Additionally, the data show that students benefit from feedback only when this is used appropriately by the student. The article also discusses the continuing importance and relevance of essay writing skills so that writing, and acting upon feedback to do with that writing, remains an integral part of the process of learning.

  5. Using Self and Peer Assessment to Improve Students' Essay Writing: A Case Study from Geography.

    Science.gov (United States)

    Mowl, Graham; Pain, Rachel

    1995-01-01

    A project to improve students' essay writing on a first-year college geography course is described. Students attended a preparatory workshop in which they helped to generate criteria, and self and peer assessment were supervised and regulated. Project success was evaluated based on analysis of marks, student feedback, and staff opinion.…

  6. Enhancing Content Knowledge in Essay Writing Classes: A Multimedia Package for Iranian EFL Learners

    Science.gov (United States)

    Majelan, Marziyeh Tahmouresi

    2014-01-01

    The main objective of this study was to investigate empirically if promoting a multimedia package enhances content knowledge in essay writing of 80 junior English translation students at a University in Karaj, Iran; plus, whether the learners' writing content improve due to the presence of the multimedia package or not. The multimedia was…

  7. Solving the Students’ Problems in Writing Argumentative Essay Through the Provision of Planning

    Directory of Open Access Journals (Sweden)

    Lestari Setyowati

    2017-10-01

    Full Text Available Most Indonesian students who are learning English often consider writing as not only the most difficult skill to master, but also a demanding activity. To help them cope these problems, the application of planning in the writing process seems to be a solution. This study attempts to find out howdifferent planning formats can improve EFL students’ writing performance in argumentative essays. The subjects of the studywere the fourth semester students taking essay writing class. The research was conducted from May to June 2015, consisting of three cycles in Classroom Action Research design by using different planning types, namely rough drafting and outlining strategy in which each cycle consisted of two meetings.The students’ compositions were measured by using primary trait scoring rubric for argumentative essay. The result of the study shows that the provision of planning is effective to improve the students’ performance in writing argumentative essay. The effectiveness of different types planningdepends on the students’ preference of which to use.

  8. Playing Harry Potter: Essays and interviews on fandom and performance, edited by Lisa S. Brenner

    Directory of Open Access Journals (Sweden)

    Abigail De Kosnik

    2016-09-01

    Full Text Available Lisa S. Brenner, editor. Playing Harry Potter: Essays and interviews on fandom and performance. Jefferson, NC: McFarland, 2015, paperback, $29.95 (238p ISBN 978-0-7864-9657-0; e-book $14.43 (5374 KB ISBN 978-1-4766-2136-4, ASIN B012E9G0R6.

  9. Accounting Issues: An Essay Series Part VI--Investments in Securities

    Science.gov (United States)

    Laux, Judy

    2008-01-01

    The sixth in a series of theory-based essays, this article presents accounting for investments in debt and equity securities along with some related conceptual and measurement issues. Additional coverage is devoted to potential ethical dilemmas and both theoretical and empirical literature related to this asset. (Contains 1 footnote.)

  10. Onsite: A Residency with Tim Rollins/KOS. A Photo Essay.

    Science.gov (United States)

    Placky, Robert

    2000-01-01

    Presents a photo essay that visually narrates the workshop that took place in State College, Pennsylvania, from October 19-24, 1998 bringing together middle and high school students with Tim Rollins, who is a conceptual artist and educator, and Kids of Survival (KOS). (CMK)

  11. D. H. Lawrence: A Collection of Critical Essays. Twentieth Century Views Series.

    Science.gov (United States)

    Spilka, Mark, Ed.

    One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Dorothy Van Ghent, Marvin Mudrick, Mark Schorer, Harry T. Moore, Julian Moynahan, Monroe Engel, Graham Hough, Mark Spilka, W. D. Snodgrass, V. de S. Pinto, Arthur E. Waterman, Richard Foster, and Raymond Williams--all…

  12. Thank you for (not) smoking : Essays on organizational theory and strategy in a contested industry

    NARCIS (Netherlands)

    Aranda Gutierrez, Ana

    2016-01-01

    This dissertation consists of three essays that consider: i) the institutional change generated by the simultaneous actions of activist organizations and corporations, ii) the influence of coercive pressures and legitimacy threats on industry performance, and iii) the importance of the concept of

  13. A Procedure for Writing Content-Fair Essay Examination Topics for Large-Scale Writing Assessments.

    Science.gov (United States)

    Hoetker, James; Brossell, Gordon

    1986-01-01

    Reports on a study in the development of content-fair essay topics that provide the majority of examinees with the chance to write on a subject about which they know a great deal, and that reduce opportunities for linguistic misinterpretation. (HTH)

  14. Latin America’s Transformative New Extraction and Local Conflicts : review essay

    NARCIS (Netherlands)

    Hogenboom, B.

    2015-01-01

    Review essay of: A. Bebbington, J. Bury (2013) Subterranean Struggles: New Dynamics of Mining, Oil, and Gas in Latin America; F. Li (2015) Unearthing conflict: Corporate Mining, Activism, and Expertise in Peru; P.I. Vásquez (2014) Oil Sparks in the Amazon: Local Conflicts, Indigenous Populations,

  15. Public Faith and the Politics of Faith: A Review Essay | Leatt ...

    African Journals Online (AJOL)

    A symposium entitled In the Presence of Faith: An Interdisciplinary Symposium on Southern African Studies of Religion was held in Johannesburg from 24 to 26 February 2010.1 This review essay outlines our rationale for the symposium, highlights its most pressing debates, and introduces the papers included in this ...

  16. The mediator's moral dilemma: An essay in memory of H.W. van der ...

    African Journals Online (AJOL)

    Several important ecumenical declarations in the 1980s emphasised the moral and theological imperative for believers to take sides with the oppressed and poor.2 Van der Merwe's grounding of the integrity of mediation in religious faith was therefore highly relevant in the context of the time. This short essay re-visits two ...

  17. Writing Essays on a Laptop or a Desktop Computer: Does It Matter?

    Science.gov (United States)

    Ling, Guangming; Bridgeman, Brent

    2013-01-01

    To explore the potential effect of computer type on the Test of English as a Foreign Language-Internet-Based Test (TOEFL iBT) Writing Test, a sample of 444 international students was used. The students were randomly assigned to either a laptop or a desktop computer to write two TOEFL iBT practice essays in a simulated testing environment, followed…

  18. Essays on Labour Markets: Worker-Firm Dynamics, Occupational Segregation and Workplace Conditions

    NARCIS (Netherlands)

    I.S. Buhai (Sebastian)

    2008-01-01

    textabstractThe main chapters of this book, “Essays on Labour Markets”, focus on analyzing the dynamics of the employment relationship between workers and firms (chapters 2 and 3), modelling occupational segregation and labour market inequalities between social groups (chapter 4) and characterizing

  19. Material Teaching Aids: Enhancement Tool for Teaching Essay Writing in Secondary Schools

    Science.gov (United States)

    Fidelia, Okonkwo Adaobi

    2015-01-01

    The purpose of this study is to investigate the use of material teaching aids as enhancement tool for teaching essay writing in secondary schools in Ebonyi State. A 4-point Likert-scale questionnaire was used as the instrument. A trial test was conducted and tested for reliability and a value of 0.75 was obtained from the test. The instrument was…

  20. Hoe zaagt men van dik hout planken? : Een essay over publieksfilosofie

    NARCIS (Netherlands)

    Kalis, A.

    2016-01-01

    Do Heidegger-teabags give philosophy a bad name? An essay about philosophy for the general public Among many academic philosophers, philosophy for the general public has a bad reputation. In this paper I give an overview of the main points of criticism, and use these to develop a positive account of