1,720,986 research outputs found
Comparative Study Of Computacional Models Generated From Representations Of Colonoscopic Images: Normal Mucosal Tissues Vs Mucosal Tissues Of Colic Polyp [estudo Comparativo De Modelos Computacionais Gerados Sobre Representações De Imagens De Coloscopia: Tecido De Mucosa Normal Vs Tecido De Mucosa De Pólipo Cólico]
No full textPurpose: to evaluate the predictive quality of computational models to differentiate colic tissues, based on Co-occorrurence Matrices (MC) representation of Coloscopic Images (IC). Materials and Methods: Image analysis and artificial intelligence methods were employed to construct computational models. Sixty seven IC images, containing polyp, were considered in this work, from which a part containing a polypus and another without it were collected given origin to 134 images. For each one of these, different MC were constructed considering five distance parameters (D = 1 to 5) and the extraction of 11 texture characteristics. With this representation, five computational models were generated based on decision trees. These models were evaluated using two techniques: (a) cross-validation and (b) contingency tables. Results: for the (a) analysis, the model with D = 3 presented the smaller average error (22.25% ± 11.85%). For the (b) analysis, models with D = 1 and 3 presented the best precision values. Conclusion: parameters D = 1 and 3 presented models with the best predictive qualities. Results showed that the constructed models were promising to be applied within decision making computational systems.2912329Karkanis, S., Galoussi, K., Maroulis, D., Classification of Endoscopic Images Based on Texture Spectrum. Advance Course in Artificial Intelligence (1999) Proceedings of Workshop on Machine Learning in Medical Applications, pp. 63-7. , Chania, GreciaFelipe, J.C., Traina, A.J.M., Traina, C., Retrieval by Content of Medical Images Using Texture for Tissue Identification (2003) Proceeding of the 16th IEEE Symposium on Computer-based Medical Systems, pp. 175-6. , New York, USARezende, S.O., (2003) Sistemas Inteligentes: Fundamentos e Aplicações, , Barueri (SP), Brasil: Editora Manole(2007) Estimativa 2008: Incidência de Câncer no Brasil, , Instituto Nacional de Câncer (INCA)., Rio de Janeiro (RJ), BrasilFerrero, C.A., Lee, H.D., Cherman, E.A., Coy, C.S.R., Fagundes, J.J., Góes, J.R.N., Et al., Utilização de Atributos Baseados em Textura para a Caracterização de Tecidos Cólicos em Imagens de Colonoscopia. (2007) Anais do VII Workshop de Informática Médica, pp. 204-213. , Porto de Galinhas (PE), BrasilFerrero, C.A., Spolaôr, N., Lee, H.D., Coy, C.S.R., Fagundes, J.J., Wu, F.C., Estudo Comparativo de Matrizes de Co-ocorrência em Análise de Imagens Médicas: Diferenciação de Tecidos Cólicos (2008) Anales del 11° Simposio Argentino de Informática y Salud, 37° Jornadas Argentinas de Informática, pp. 1-12. , Santa Fe (SF), Argentina;Haralick, R., Shanmugam, K., Dinstein, I., Texture Features for Image Classification (1973) Proceeding of IEEE Transaction on Systems, Man, and Cybernetis, 3 (6), pp. 610-621Quinlan, J.R., (1993) C4.5: Programs for Machine Learning, , San Mateo (CA), USA: Editora Morgan KaufmannDoria, U., (1999) Introdução à Bioestatística: Para simples mortais, , São Paulo (SP), Brasil: Editora ElseiverHowarth, P., Yavlinsky, A., Heesch, D., Rüger, S., (2005) Medical Image Retrieval Using Texture, Locality and Colour, pp. 740-749. , Lecture Notes from the Cross Language Evaluation ForumKarkanis, S., Detecting Abnormalities in Colonoscopic Images by Textural Description and Neural Networks (1999) Proceedings of Workshop on Machine Learning in Medical Applications, Advance Course in Artificial Intelligence, 5, pp. 59-62. , Chania, GreeceFerrero, C.A., Lee, H.D., Cherman, E.A., Coy, C.S.R., Góes, J.R.N., Fagundes, J.J., Wu, F.C., Utilização de Técnicas Computacionais para a Diferenciação Cólicos em Imagens Colonoscópicas (2007) 56° Congresso Brasileiro de Coloproctologia: Rev Bras de Coloproct, 27, pp. 45-46. , Curitiba (PR), Brasi
Evaluation Of The Force X Elongation Curves Dispersion Of Descending Colon Of Rats Using Boltzmann's Sigmoidal Model [avaliação Da Dispersão De Curvas Força X Elongação De Segmentos De Cólon Descendente De Ratos Por Meio Do Modelo Sigmoidal De Boltzmann]
No full textPurpose: to evaluate the dispersion of Force x Elongation curves (FE) that represents the mechanical behavior of rat's colon. Materials and Methods: ten descending colon segments were submitted to the Total Energy of Rupture Test. Each curve generated by this test was fitted to Boltzmann model that correlates the values of force and elongation through the combination of the parameters A1, A2, x0 and dx. Then, for each parameter were calculated the mean, standard deviation and their correlations. Later, the resultant dispersion was determinated in the whole deformation process by an analysis that considers the correlations between the greatnesses based on the propagation of uncertainties law. The resultant dispersion was multiplied by a coverage factor, considering a normal distribution, to determinate an interval in which 95% of force values will be present. Results: the mean, standard deviation and correlation were determined. The resultant dispersion of force values was expanded drawing limits inside which FE curves will be for a confidence interval of 95%. Conclusion: this methodology will be possibly used to evaluate variables that act on the intestinal mechanical behavior.2915156Fagundes, J.J., (1990) Estudo comparativo da cicatrização de anastomoses cólicas realizadas com auxílio do bisturi laser de dióxido de carbono: Trabalho experimental em cães, , Tese dedoutorado - Faculdade de Ciências Médicas da Universidade Estadual de Campinas, Campinas, SPWu, F.C., Lee, H.D., Machado, R.B., Dalmás, S., Coy, C.S.R., Góes, J.R.N., Fagundes, J.J., Apresentação do teste energia total de ruptura para avaliação de material biológico com propriedade viscoelástico não-linear (2004) Acta Cir Bras, 19 (6). , [serial on-line], Nov - DezWu, F.C., (2003) Estudo dos efeitos de diferentes concentrações de oxigênio e da hiperoxigenação hiperbárica sobre anastomose cólica comprometida ou não pela isquemia: Trabalho experimental em ratos, , Tese de doutorado - Faculdade de Ciências Médicas da Universidade Estadual de Campinas, Campinas, SPHendriks, T., Mastboom, W.J.B., Healing of experimental intestinal anastomoses (1990) Diseases of the Colon & Rectum, 33, pp. 891-901Burin, E.L.K., Lee, H.D., Niz, M.A.K., Silva, M.C.C., Coy, C.S.R., Góes, J.R.N., Predição do Comportamento Mecânico de Segmentos de Cólon Descendente de Ratos por meio do Modelo Sigmoidal de Boltzmann (2007) 56° Congresso Brasileiro de Coloproctologia: Anais do 56° Congresso Brasileiro de Coloproctologia, , 2007CuritibaNiz, M.A.K., Burin, E.L.K., Wu, F.C., Lee, H.D., Nogueira, F.M.A., Fagundes, J.J., Góes, J.R.N., Utilização dos modelos matemáticos de Boltzmann, de Chapman e Logístico para o estudo do comportamento mecânico de segmentos de cólon descendente de ratos (2006) CBIS 2006: Anais do X Congresso Brasileiro de Informática em Saúde, , 2006FlorianópolisVoltolini, R.F., Metz, J., Machado, R.B., Lee, H.D., Wu, F.C., Fagundes, J.J., Góes, J.R.N., SABI 2.0: Um sistema para a realização de teste biomecânicos em material viscoelástico não linear (2003) Laptec2003: Proceedings of The 4th Congress of Logic Applied to Technology, , 2003MaríliaBurin, E.L.K., Niz, M.A.K., Lee, H.D., Nogueira, F.M.A., Fagundes, J.J., Góes, J.R.N., Wu, F.C., Aplicação do Modelo Sigmoidal de Boltzmann para o Ajuste das Curvas Força x Elongação de Cólon Descendente de Ratos obtidas por meio do Aplicativo SABI 2.0 (2006) WIM 2006: Anais do VI Workshop de Informática Médica, , 2006Vila Velhada Silva, G.R., Sobre o modelo catalítico reversível aplicado ao estudo da cinética epidemiológica da infecção chagásica. Rev (1969) Saúde públ, 3 (1), pp. 23-9Silva, E.M., Lima, J.E.F.W., Rodrigues, L.N., Azevedo, J.A., Comparação de modelos matemáticos para o traçado de curves granulométricas (2004) Pesq. agropec. bras., 39 (4), pp. 363-70Toledo, R.E.B., Filho, R.V., Bezutte, A.J., Pitelli, R.A., Alves, P.L.C.A., Valle, C.F., Períodos de controle de Brachiaria sp e seus reflexos na produtividade de Eucalyptus grandis (2003) Scientia Forestalis, 63, pp. 221-32Tyson, J.W., Meade, J.H., Dalrymple, G.V., Marvin, H.N., Some Biomedical Applications of a Non-Linear Curve Fit Method (1967) J Nucl Med, 8, pp. 558-69Guimarães, P.S., (2001) Ajuste de curvas experimentais, , 1a ed. Santa Maria: Editora UFSMMotulsky, H., Christopoulos, A., (2003) Fitting Models to Biological Data Using Linear and Nonlinear Regression: A Practical Guide to Curve fitting, , New York: Oxford University Press2004. 13Juan-Les-Pins, FR. New York: SpringerBurin, E.L.K., Lee, H.D., Niz, M.A.K., Silva, M.C.C., Góes, J.R.N., Wu, F.C., Estudo Matemático do Comportamento Mecânico de Segmentos de Cólon Descendente com Anastomose: Trabalho Experimental em Ratos (2007) 56° Congresso Brasileiro de Coloproctologia: Anais do 56° Congresso Brasileiro de Coloproctologia, , 2007Curitib
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Unusual Finding After Resection Of Rectal Adenocarcinoma: Report Of Two Cases [achado Incomum Após Ressecção De Adenocarcinoma Do Reto: Relato De Dois Casos]
No full textPelvic recurrence after resection of rectal adenocarcinoma is a feared complication and is associated with a worse prognosis and low resectability rates. The differential diagnosis is diff cult, as biopsy is seldom performed preoperatively. We report two cases of desmoid pelvic tumor after resection of rectal adenocarcinoma. Therapeutic options and literature review are described. © 2013 Elsevier Editora Ltda. All rights reserved.333157160Leal, R.F., Ayrizono, M.L.S., Fagundes, J.J., Oliveira, P.S.P., Ângelo, S.N., Coy, C.S.R., Góes, J.R.N., Recidiva Pélvica de Adenocarcinoma de Reto - Abordagem Cirúrgica (2008) Rev Bras Coloproct, 28 (1), pp. 040-045Shinagare, A.B., Ramaya, N.H., Jagannathan, J.P., Krajewski, K.M., Giardino, A.A., Butrynski, J.E., A to Z of Desmoid Tumors (2011) Am J Roentegnol, 197 (6), pp. 1008-1014Sakorafas, G.H., Nissotakis, C., Peros, G., Abdominal Desmoid Tumors (2007) Surg Oncol, 16 (2), pp. 131-142Escobar, C., Munker, R., Thomas, J.O., Li, B.D., Burton, G.V., Update on desmoid tumors (2012) Ann Oncol, 23 (3), pp. 562-569Wanjeri, J.K., Opeya, C.J.O., A massive abdominal wall desmoid tumor occurring in a laparotomy scar: A case report (2011) World J Surg Oncol, 9 (35), pp. 1-4Kasper, B., Strbel, P., Hohenberger, A., Desmoid tumors: Clinical features and treatment options for advanced disease (2011) Oncologist, 16 (5), pp. 682-693Bertani, E., Chiappa, A., Testori, A., Mazzarol, G., Biff, R., Martella, S., Desmoid Tumors of the Anterior Abdominal Wall: Results from a Monocentric Surgical Experience and Review of the Literature (2009) Ann Surg Oncol, 16 (6), pp. 1642-1649Spiridakis, K., Panagiotakis, G., Grigoraki, M., Kokinnos, I., Papadakis, T., Kokkinakis, T., Isolated giant mesenteric f bromatosis (intra-abdominal desmoid tumors) (2008) Case Report. G Chir, 29 (10), pp. 413-416Bonvalot, S., Desai, A., Coppola, S., Pechoux, C.L., Terrier, P., Domont, J., The treatment of desmoid tumors: A stepwise clinical approach (2012) Ann Oncol, 22 (10), pp. 158-166Leal, R.F., Silva, P.V., Ayrizono, M.L.S., Fagundes, J.J., Amstalden, E.M., Coy, C.S., Desmoid tumor in patients with familial adenomatous polyposis (2010) Arq Gastroenterol, 47 (4), pp. 373-378Valejo, F.A.M., Tiezzi, D.G., Nai, G.A., Tumor desmoide abdomino-pélvico (2008) Rev Bras Ginecol Obstet, 31 (1), pp. 35-40Duggal, A., Dickinson, I.C., Sommerville, S., Gallie, P., The management of extra-abdominal desmoids tumours (2004) Int Orthop, 28 (4), pp. 252-256Camargo, V.P., Keohan, M.L., Adamo, D.R., Antonescu, C.R., Brennan, M.F., Singer, S., (2010) Cancer, 116 (9), pp. 2258-2265Oguz, M., Bedirli, A., Gultekin, A., Dursun, A., Mentes, B.B., (2006) Dis Colon Rectum, 49 (9), pp. 1445-1448Lee, J.C., Thomas, J.M., Phillips, S., Fisher, C., Moskovic, E., (2006) Am J Roentgenol, 186 (1), pp. 247-254Sinha, A., Hansmann, A., Bhandari, S., Gupta, A., Burling, D., Rana, S., Imaging assessment of desmoid tumours in familial adenomatous polyposis: Is state-of-the-art 1.5 T MRI better than 64-MDCT? (2012) Br J Radiol, 85 (1015), pp. 254-261Kasper, B., Dimitrakopoulou-Strauss, A., Strauss, L.G., Hohenberger, P., Positron emission tomography in patients with aggressive f bromatosis/desmoid tumours undergoing therapy with imatinib (2010) Eur J Ncl Med Mol Imaging, 37 (10), pp. 1876-1882Melis, M., Zager, J.S., Sondak, V., Multimodality Management of Desmoid Tumors: How Important Is a Negative Surgical Margin? (2008) J Surg Oncol, 98 (8), pp. 594-602Middleton, S.B., Phillips, R.K.S., Surgery for Large Intra-Abdominal Desmoid Tumors (2000) Dis Colon Rectum, 43 (12), pp. 1759-1762Merchant, B.N., Lewis, J.J., Woodruff, J.M., Leung, D.H., Brennan, M.F., Extremity and trunk desmoid tumors: A multifacial analysis of outcome (1999) Cancer, 86 (10), pp. 2045-205
Chagasic Megacolon And Large Bowel Neoplasms: Case Series And Literature Review
No full textThere is a clear association between chagasic megaesophagus and the esophageal cancer. On the other hand, the association between chagasic megacolon and intestinal neoplasm is uncommon. There are only a few cases described in literature. We selected two cases of colorectal adenocarcinoma associated with adenoma from 2000 to 2011, which are added to the four patients already described by this group. The mean age of the patients, was 68.5 years. Both had been submitted to surgical resection of the neoplasm. Survival rates ranged and were directly related to tumor staging at the time of diagnosis. In this context, we report our case series and reviwed the corresponding literature, especially the clinical and epidemiological aspects of this rare association.314372377Adad, S.J., Etchebehere, R.M., Araújo, J.R., Madureira, A.B., Lima, V.G.F., Silva, A.A., Association of chagasic megacolon and cancer of the colon: Case report and review of the literature (2002) Rev Soc Bras Med Trop, 35, pp. 63-68Abreu, R.B., Quaglieri, P., Ribeiro, M.F., Corsi, P.R., Castro, L.T., Gagliardi, D., Megaesôfago: Doença precursora do câncer de esôfago (1990) Rev Bras Cirur, 80, pp. 91-94Brandalise, N.A., Andreollo, N.A., Leonardi, L.S., Callejas, N.F., Carcinoma associado a megaesôfago chagásico (1985) Rev Col Bras Cir, 12, pp. 196-199Huggins, D., Carcinoma do esôfago associado ao megaesôfago chagásico (relato de um caso) (1976) An Inst Hig Med Trop, 4, pp. 57-62Livstone, E.M., Skinner, D.B., Tumors of the esophagus (1985) Bockus Gastroenterology, pp. 814-840. , In: Berr JE, 4th ed. Philadelphia: WB Saunders CoLopes, E.R., Megaesôfago, megacólon e câncer (1988) Rev Soc Bras Med Trop, 21, pp. 91-94Lustig, E.S., Puricelli, L., Lansetti, J.C., Association of Chagas' disease and cancer (1980) Medicina, 40, pp. 43-46Oliveira, E.C., Associação Entre Infecção Crônica Pelo Trypanosoma Cruzi E Câncer De Cólon (1998) Estudo Experimental Em Ratos [Dissertação De Mestrado], , Goiânia (GO): Universidade Federal de GoiásRezende, J.M., Rosa, H., Vaz, M.G.M., Andrade-Sá, N., Porto, J.D., Neves, N.J., Endoscopia no megaesôfago. Estudo prospectivo de 600 casos (1985) Arq Gastroenterol, 22, pp. 53-62Rocha, A., Almeida, H.O., Esper, F.E., Moraes, D.M., Santos, E.P., Teixeira, V.P.A., Associação entre megaesôfago e carcinoma de esôfago (1983) Rev Soc Bras Med Trop, 16, pp. 94-97Pinotti, H.W., Pollara, W.M., Gemperi, R., Raia, A.A., O problema do câncer no megaesôfago (1980) Rev Ass Méd Bras, 26, pp. 379-381Fagundes, J.J., Góes, J.R.N., Coy, C.S.R., Ayrizono, M.L.S., Mochizuki, M., Chadu, M., Associação entre megacólon chagásico e câncer do intestino grosso: Apresentação de casos e revisão da literatura (2002) J Coloproctol, 22, pp. 252-256Garcia, S.B., (1995) O Câncer No Megacólon: Estudos Da Incidência No Homem E Experimental Em Ratos [Tese De Doutorado], , Ribeirão Preto (SP): Faculdade de Medicina da Universidade de São PauloGarcia, S.B., Oliveira, J.S.M., Pinto, L.Z., Muccillo, G., Zucoloto, S., The relationship between megacolon and carcinoma of the colon: An experimental approach (1996) Carcinogenesis, 17, pp. 1777-1796Oliveira, E.C., Leite, M.S.B., Miranda, J.A., Andrade, A.L., Garcia, S.B., Luquetti, A.O., Chronic Trypanosoma cruzi infection associated with low incidence of 1,2-dimethylhydrazine-induced colon cancer in rats (2001) Carcinogenesis, 22, pp. 737-740Meneses, A.C.O., Lopes, M.A.B., Rocha, A., Fatureto, M.C., Lopes, G.P., Lopes, E.R., Megas e câncer. Câncer de intestino grosso em chagásicos com megacólon (1989) Arq Gastroenterol, 26, pp. 13-16Gabella, G., Size of neurons and glial cells in the intramural ganglia of the hypertrophic intestine of the guinea-pig (1984) J Neurocyt, 13, pp. 73-84Gabriel-Neto, S., Oliveira, E.C., Carmo, F.V., Conceição, D.C., Mendonça, G.G., Leite, M.S.B., Megacólon chagásico associado à adenocarcinoma de cólon (1998) Rev Soc Bras Med Trop, 31, pp. 46-49Crema, E., Lima, V.G.F., Madureira, A.B., Adad, S.J., Silva, A.A., Oliveira, C.B., Associação de neoplasia obstrutiva com megacólon chagásico (1999) J Coloproctol, 19, pp. 87-8
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